Pipe penetrating device for optical fiber bundle

Abstract

The utility model belongs to the field of optical fiber tube penetration, and discloses an optical fiber bundle tube penetration device, which comprises an optical fiber fixing assembly and a tube penetration assembly which are arranged along the direction of optical fiber tube penetration, the optical fiber fixing assembly comprises a threading component for the optical fiber bundle to penetrate through, and the threading component is provided with a plurality of wiring holes for each optical fiber of the optical fiber bundle to penetrate through; the tube penetrating assembly comprises a clamp which is used for installing an optical fiber sleeve and can move in the tube penetrating direction of the optical fiber, and the clamp is provided with a detection device used for detecting the tube penetrating pressure of the optical fiber. According to the utility model, the problems of disordered arrangement, offset and the like caused by dislocation of the optical fiber bundle due to easy stress in the pipe penetrating process can be avoided, the problem of easy breakage caused by disordered arrangement and offset is also reduced, and the clamp of the pipe penetrating assembly can be used for installing the optical fiber sleeve and detecting the pipe penetrating pressure through the detection device, so that the pipe penetrating efficiency is improved. In this way, timely stopping and tube penetrating operation can be facilitated, bending and breakage of the optical fiber are avoided, and the success rate of tube penetrating of the optical fiber bundle can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber threading, and particularly relates to an optical fiber bundle threading device. Background Art

[0002] There are three main methods for fabricating fiber combiners: side-bonding, knotting, and sleeve-bonding. Sleeving involves inserting multiple optical fibers into a quartz tube and then tapering the entire tube to achieve fusion between the fibers and between the fiber bundle and the tube. The quartz tube arranges the fibers and constrains the spacing between them. This method is commonly used to create N×1 signal combiners and (N+1)×1 pump combiners. It's important to understand that the original inner diameter of the quartz tube must be larger than the original cladding size of the fiber bundle to allow the original-sized fiber bundle to fit through the tube. The fabrication of sleeve-bonded pump combiners often imposes certain requirements on the device's insertion loss. The main cause of insertion loss, in addition to signal fiber offset affecting subsequent splicing, is deformation of the signal fiber core during the tapering process. For example, if a 20 / 400 signal fiber core is tapered to 100 μm, and its cladding is tapered from 400 μm to 100 μm, the core will be tapered from 20 μm to 5 μm. The greater the tapering, the greater the deformation of the signal fiber core, resulting in greater insertion loss.

[0003] Therefore, in order to reduce the insertion loss as much as possible, Figure 1 As shown, it is not usually chosen to significantly taper the original-size optical fiber and the original-size quartz tube 3 together to the required size. Instead, the pump fiber 2 is tapered first, the signal fiber 1 is etched first (etching the cladding does not affect the core), and the quartz tube 3 is also tapered to the corresponding size before the tube is inserted. Finally, the entire structure is slightly tapered to fuse the fibers together, ensuring that the core of the signal fiber 1 is only slightly tapered during the entire production process. This method can effectively reduce insertion loss, but it also reduces the fiber strength of the pump fiber and signal fiber, increasing the difficulty of tube insertion. In addition, the size of the quartz tube after taper can only be slightly larger than the size of the fiber bundle. If it is too small, the fiber bundle cannot pass through. If it is too large, the fiber movement range is large and the arrangement position is chaotic. When the fiber bundle is not inserted into the tube, it is impossible for the fibers to remain 100% parallel to each other. There is always a slight tilt. When this tilted fiber accidentally touches the quartz tube wall, it is easy to be squeezed by the force of other fibers, causing fiber arrangement chaos, signal fiber displacement, or even fiber breakage. The breakage of the optical fiber will inevitably lead to the failure of device manufacturing, and the deviation of the signal fiber will cause huge insertion loss after the subsequent fiber bundle and output fiber are fused, making the device unqualified. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a fiber optic bundle threading device to solve the problems of disordered arrangement, signal fiber deviation and even fiber breakage in the conventional fiber optic bundle threading process.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fiber optic bundle threading device includes an optical fiber fixing assembly and a threading assembly arranged along the optical fiber threading direction. The optical fiber fixing assembly includes a threading member for the optical fiber bundle to pass through, and the threading member is provided with a plurality of wiring holes for each optical fiber of the optical fiber bundle to pass through; the threading assembly includes a clamp for installing the optical fiber sleeve and being movable in the direction of the optical fiber threading, and the clamp is provided with a detection device for detecting the pressure of the optical fiber threading.

[0007] In a possible implementation, one end of the threading member is a tapered structure that is nested with the optical fiber sleeve, and the hole spacing between the plurality of wiring holes gradually decreases toward the tapered end.

[0008] In a possible implementation, the plurality of wiring holes include a central hole and a plurality of peripheral holes evenly distributed around the central hole, and the diameter of the central hole is greater than or equal to the outer diameter of the signal fiber core in the optical fiber bundle.

[0009] In a possible implementation, the threading member is provided with an annular elastic member for binding the optical fiber bundle at the tapered end of the threading member.

[0010] In a possible implementation, the optical fiber fixing assembly further includes a bracket and a pressing member, and the threading member and the pressing member for pressing and fixing the optical fiber bundle are arranged on the bracket.

[0011] In a possible implementation, the clamp is an annular clamp, a detection device is provided on the inner side of the annular clamp, and the detection device is a flexible detection device and is externally connected to a pressure display.

[0012] In a possible implementation, the tube threading assembly further includes a multi-directional adjustment assembly, and the clamp is provided on the multi-directional adjustment assembly so as to adjust the position of the optical fiber sleeve on the clamp in the optical fiber tube threading direction through the multi-directional adjustment assembly.

[0013] In a possible implementation, the pipe threading assembly further includes a second bracket, the multi-directional adjustment assembly is arranged on the second bracket via a lifting mechanism, and the adjustment direction of the multi-directional adjustment assembly includes at least one of the X direction, the Y direction, and the Z direction.

[0014] In a possible implementation, it also includes a focusing assembly arranged in the direction of the optical fiber passing through the tube and located behind the tube passing assembly, the focusing assembly includes a focusing lens group and an offset measuring disk arranged along the direction of the optical fiber passing through the tube, and the disk surface of the offset measuring disk is provided with a scale.

[0015] In a possible implementation, the focusing assembly further includes the bracket three fixedly arranged relative to the fixture, and the focusing lens group and the offset measuring disk are arranged on the bracket three.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The optical fiber bundle threading device of the present invention can route each optical fiber of the optical fiber bundle according to a preset threading layout through the threading component of the optical fiber fixing assembly, so that the relative positions of the optical fibers are fixed, and the optical fiber bundle is prevented from being easily stressed and misplaced during the threading process, resulting in problems such as disordered arrangement and offset, and the problem of easy breakage due to disordered arrangement and offset is also reduced. In addition, the clamp of the threading assembly can install the optical fiber sleeve and detect the threading pressure through the detection device, which can facilitate timely stopping and threading operations, avoid bending and breaking of optical fibers, and help improve the success rate of the fiber bundle threading.

[0018] Moreover, it can also realize the precise and flexible threading of optical fiber bundles through quartz tubes, and can measure the force on the optical fiber bundle and the deviation of the signal fiber during the threading process, thus ensuring the reliability of the threading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 There are two existing methods for making the pump combiner sleeve, Figure 1 a is the size of the original fiber bundle directly inserted into the original quartz tube, Figure 1 b is the quartz tube after the tapered pump fiber and the corroded signal fiber penetrate into the tapered tube;

[0020] Figure 2 Schematic diagram of the structure of a fiber bundle tube threading device, in which the fiber bundle tube threading device is in a testing state;

[0021] Figure 3 A side view of an optical fiber fixing assembly of an optical fiber bundle threading device;

[0022] Figure 4 This is a front view of an optical fiber fixing assembly of an optical fiber bundle threading device, which also shows a schematic diagram of the installation of a pressing member and a threading member;

[0023] Figure 5 A three-dimensional view of a threading component of an optical fiber fixing assembly of an optical fiber bundle threading device;

[0024] Figure 6 A schematic diagram of the optical fiber bundle routing effect of a threading component of an optical fiber fixing assembly of an optical fiber bundle threading device;

[0025] Figure 7 A side view of a tube threading assembly of an optical fiber bundle tube threading device;

[0026] Figure 8 It is a front view of a tube threading assembly of an optical fiber bundle tube threading device;

[0027] Figure 9 A schematic diagram of the fixture installation structure of a tube threading assembly of an optical fiber bundle tube threading device;

[0028] Figure 10 A schematic diagram of the tube threading principle of a tube threading assembly of an optical fiber bundle tube threading device;

[0029] Figure 11 A top view of a tube threading assembly of an optical fiber bundle tube threading device during installation of an optical fiber sleeve;

[0030] Figure 12 This is a schematic diagram of the connection structure between the focusing component and the tube threading component of an optical fiber bundle tube threading device;

[0031] Figure 13 An exploded view of a focusing lens assembly of a focusing component of an optical fiber bundle threading device;

[0032] Figure 14 A top view of an offset measurement disk of a focusing assembly of an optical fiber bundle threading device;

[0033] Figure 15 Schematic diagram of two types of deviations that are easy to occur when the optical fiber bundle is threaded through the tube, where Figure 15 a is a side view and a cross-sectional view of a partially offset side view and a cross-sectional view, Figure 15 b is the fully offset side view and cross-sectional view.

[0034] In the figure: 1 - signal fiber; 2 - pump fiber; 3 - quartz tube; 5 - bracket 1; 6 - fiber bundle; 7 - threading member; 71 - circumferential hole; 72 - center hole; 73 - rubber ring; 8 - V-groove fiber clamp; 9 - U-groove clamp; 10 - bracket 2; 101 - guide rail; 102 - lead screw and nut mechanism 2; 103 - rotating handwheel; 11 - sliding frame; 12 - 3D translation stage; 121 - adjustment handle 1; 122 - adjustment handle 2; 123 - adjustment handle 3; 13-Clamp; 131-Connecting support; 132-Annular clamp; 14-Quartz tube; 141-Tapered area; 142-Straight area; 151-Flexible detection device; 152-Pressure display; 161-Interaction force between optical fiber bundle and quartz tube; 162-Interaction force between quartz tube and flexible detection device; 17-Bracket three; 171-Focusing assembly; 172-Offset measuring disk; 18-Focusing lens; 19-Cladding light stripper; 20-Red light source. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0036] Please refer to Figure 2-14As shown, an embodiment of the present application provides an optical fiber bundle threading device, including an optical fiber fixing assembly and a threading assembly arranged along the optical fiber threading direction, the optical fiber fixing assembly includes a threading member 7 for the optical fiber bundle 6 to pass through, the threading member 7 is provided with a plurality of wiring holes for each optical fiber of the optical fiber bundle 6 to pass through; the threading assembly includes a clamp 13 for installing the optical fiber sleeve and movable in the optical fiber threading direction, the clamp 13 is provided with a detection device for detecting the optical fiber threading pressure.

[0037] The optical fiber assembly is used to fix the optical fiber bundle 6, and the tube threading assembly is used to thread the optical fiber sleeve and the optical fiber bundle 6 along the optical fiber threading direction. The threading component 7 of the optical fiber fixing assembly is used to arrange and wire the optical fiber bundle 6 composed of multiple optical fibers, so that the optical fiber bundle 6 passes through according to the required arrangement or preset arrangement, and the relative position is fixed by maintaining a certain interval, so that the arrangement disorder and easy breakage can be effectively avoided during the tube threading process. The clamp 13 of the tube threading assembly is used to load the optical fiber sleeve, and the clamp 13 can move in the optical fiber threading direction, so that the optical fiber bundle 6 can be inserted into the optical fiber sleeve. The movement of the clamp 13 can be driven by a multi-directional moving mechanism. Since the wall of the quartz tube 14 will squeeze the optical fiber bundle 6 during the tube threading process, the pressure of the optical fiber threading can be monitored by a detection device that can detect the pressure of the optical fiber threading, so that it is convenient to stop and adjust the threading operation in time to avoid the bending and breakage of the optical fiber.

[0038] Through the above-mentioned technical solution, the threading component 7 of the optical fiber fixing assembly can route each optical fiber of the optical fiber bundle 6 according to a preset pipe threading layout, so that the relative positions between the optical fibers are fixed, avoiding problems such as dislocation caused by stress during the threading process, resulting in chaotic arrangement and offset, and also reducing the problem of easy breakage due to chaotic arrangement and offset. In addition, through the clamp 13 of the pipe threading assembly, the clamp 13 can install the optical fiber sleeve and detect the pipe threading pressure through the detection device, which can facilitate timely stopping and pipe threading operations, avoid optical fiber bending and breakage, and help improve the success rate of pipe threading of the optical fiber bundle 6.

[0039] In one embodiment, combining Figure 5 and Figure 6 As shown, one end of the threading member 7 is a tapered structure that is nested with the optical fiber sleeve, and the hole spacing between the plurality of wiring holes gradually decreases toward the tapered end.

[0040] In this way, one end of the threading component 7 is used for threading the tube and is configured as a conical structure that is nested with the optical fiber sleeve. During the optical fiber threading process, when the optical fiber sleeve moves toward the optical fiber bundle 6 along the optical fiber threading direction, the optical fiber sleeve can be threaded on the conical end of the threading component 7, and with the gradual feeding of the threading action, the inner surface of the optical fiber sleeve can also move better along one end of the conical structure of the threading component 7, and then better threading can be achieved through the gradually tightening conical matching structure. At the same time, the hole spacing between several wiring holes gradually decreases toward the conical end, so that the optical fiber bundle 6 can be tightened at one end of the conical structure when passing through the threading component 7, thereby facilitating threading.

[0041] Furthermore, in order to make the arrangement of the optical fiber bundle 6 more suitable for passing through the pipe and reduce insertion loss, the plurality of wiring holes include a central hole 72 and a plurality of peripheral holes 71 evenly distributed around the central hole 72, and the aperture of the central hole 72 is greater than or equal to the outer diameter of the core of the signal fiber 1 in the optical fiber bundle 6.

[0042] In this way, the threading component 7 can pass through the wiring hole structure for the light beams distributed in a manner such as N+1, and it is more convenient to pass through in a structure similar to a lotus root hole. In addition, by configuring the aperture of the center hole 72 to be greater than or equal to the outer diameter of the optical fiber core in the optical fiber bundle 6, it is convenient for the optical fiber core after cladding corrosion to pass through the center hole 72, ensuring that the optical fiber core is only slightly tapered during the entire production process. This method can effectively reduce insertion loss.

[0043] For example, taking the production of a (6+1)×1 pump combiner as an example, the six outer pump fibers 2 are tapered and arranged around the etched signal fiber 1 in the middle, and are respectively passed through the circumferential holes 71 and the center hole 72 of the threading component 7 and fixed, and the tube is threaded in this way; in order to minimize the insertion loss as much as possible, the pump fiber 2 is tapered first and the signal fiber 1 is corroded first (corroding the cladding does not affect the fiber core), and the optical fiber sleeve is also tapered to the corresponding size before the tube is threaded, and finally the whole is slightly tapered to melt the optical fibers, ensuring that the core of the signal fiber 1 is only slightly tapered during the entire production process. This method can effectively reduce the insertion loss, and can also help avoid arrangement confusion and breakage during the threading process.

[0044] In order to better maintain the tightened state of the optical fiber bundle 6 after passing through the threading member 7, the threading member 7 is further provided with an annular elastic member for restraining the optical fiber bundle 6 at the tapered end of the threading member 7.

[0045] The annular elastic member can be an elastic rubber ring 73, which can be put on the other end of the threading member 7 when not in use. After threading, the rubber ring 73 can be slid to one end of the tapered structure to restrain the optical fiber bundle 6. In this way, the optical fiber bundle 6 can be tightened after passing through the threading member 7, which is more conducive to threading the pipe.

[0046] For example, in the process of making a (6+1)×1 pump combiner, six pump fibers 2 and one signal fiber 1 are respectively inserted into the threading components 7 of corresponding aperture sizes, the stripping points between the optical fibers are aligned, the rubber ring 73 is slid to one end of its tapered structure to restrain the optical fiber bundle 6, and the threading component 7 is fixed. In this way, the relative positions of the optical fibers can be fixed and the entire optical fiber bundle 6 can be fixed on the fixture 13.

[0047] During specific implementation, the optical fiber fixing assembly may further include a bracket 5 and a holding member. The threading member 7 and the holding member for holding and fixing the optical fiber bundle 6 are disposed on the bracket 5. The bracket 5 is used to support the holding member and the threading member 7. Both the holding member and the threading member 7 are located in the direction of optical fiber threading, thereby respectively holding and fixing the optical fiber bundle 6 and threading and routing the optical fiber bundle 6, allowing the optical fiber bundle 6 to be threaded more stably. Specifically, the holding member is a V-groove optical fiber clamp 8. The optical fiber bundle 6 is clamped and held in the V-groove of the clamp 13, thereby securing the optical fiber bundle 6. The threading member 7 is also secured by a U-groove clamp 9.

[0048] In a preferred embodiment of the clamp 13 , the clamp 13 is an annular clamp 132 , and a detection device is provided on the inner side of the annular clamp 132 . The detection device is a flexible detection device 151 and is externally connected to a pressure display 152 .

[0049] The annular clamp 132 is an annular structure, and its inner diameter is consistent with the outer diameter of the optical fiber sleeve. This can clamp the optical fiber sleeve and prevent it from falling off. The flexible detection device 151 set on its inner side can detect the pipe threading pressure during the threading process. The pressure and other information can be displayed by the Ali display. In this way, it is possible to detect whether the inner wall of the threading component 7 has squeezed the optical fiber bundle 6 during the threading process. If the value fluctuates significantly, the threading process needs to be stopped and the optical fiber bundle 6 must be straightened again before trying again. Specifically, the forces acting during the threading process include the interaction force 161 between the optical fiber bundle and the quartz tube and the interaction force 162 between the quartz tube and the flexible detection device. The flexible detection device 151 mainly reacts to the interaction force 162 between the quartz tube and the flexible detection device.

[0050] In the specific implementation process, the flexible detection device 151 can be a flexible and sheet-shaped pressure-sensitive device, and is arranged on the inner side of the annular clamp 132. The external pressure display 152 can monitor the pressure situation during the passing process, which is more convenient and practical.

[0051] In order to load the optical fiber sleeve more stably, two annular clamps 132 are provided and located on the same straight line. The annular clamp 132 located at the bottom may not be provided with a detection device. The two annular clamps 132 are set on the fixing plate of the clamp 13 through the connecting support 131.

[0052] Specifically, the optical fiber sleeve is a quartz tube 14, which is tapered before threading. After tapering, the quartz tube 14 has a straight surface and a tapered area 141. The inner diameter of the straight area 142 is slightly larger than the diameter of the optical fiber bundle 6 after being tightly fitted, so that the optical fiber bundle 6 can pass through. However, the optical fibers cannot fit tightly together in a natural state, and there must be gaps. The gaps will most likely cause the diameter of the optical fiber bundle 6 to be larger than the inner diameter of the straight area 142 of the quartz tube 14. Therefore, in the process of the tapered quartz tube 14 passing the optical fiber bundle 6 from bottom to top, the optical fiber bundle 6 will inevitably contact the wall of the quartz tube 14. Once the force between the tube wall and the optical fiber bundle 6 is too large, it is very likely to cause the corroded signal fiber 1 or the tapered pump fiber 2 to bend and break. The breakage or bending of the optical fiber will cause the spatial diameter of the optical fiber bundle 6 to increase, making it difficult to thread the pipe and generating more resistance. However, this part of the resistance change is difficult to perceive through manual or mechanical operation. Therefore, the flexible detection device 151 can effectively detect the fluctuation of the force exerted on the pipe wall by the optical fiber bundle 6 during the threading process in real time, and stop and adjust the threading operation in time to avoid bending and breakage of the optical fiber.

[0053] In an embodiment of the present application, the tube threading assembly may further include a multi-directional adjustment assembly, and the clamp 13 is arranged on the multi-directional adjustment assembly to adjust the position of the optical fiber sleeve on the clamp 13 in the optical fiber tube threading direction through the multi-directional adjustment assembly.

[0054] The fixture 13 for loading the optical fiber ferrule is set on the multi-directional adjustment component, which can adjust the position of the fixture 13 in the direction of optical fiber threading, thereby enabling it to perform the threading operation more accurately. Specifically, the fixture 13 can be connected to the multi-directional adjustment component via a connecting rod.

[0055] In one embodiment, the pipe threading assembly may further include a second bracket 10, and the multi-directional adjustment assembly is set on the second bracket 10 through a lifting mechanism. The adjustment direction of the multi-directional adjustment assembly includes at least one of the X direction, the Y direction and the Z direction.

[0056] In this way, the multi-directional adjustment mechanism can fine-tune the position in at least one direction including the X direction, the Y direction and the Z direction. The lifting mechanism can be used to enable the clamp 13 to move the optical fiber sleeve along the pipe threading direction for pipe threading. Such a movable matching relationship can make pipe threading more accurate and flexible.

[0057] In a specific implementation, the multi-directional adjustment assembly can utilize a three-dimensional translation stage 12. The three-dimensional translation stage 12 is equipped with a screw-nut mechanism (I) in each direction, and is equipped with adjustment handles (I, 121, II, 122, and III, 123) for adjustment. The lifting mechanism can also utilize a screw-nut mechanism, such as a sliding frame 11 slidably mounted on bracket 2 10 and a screw-nut mechanism (II, 102) connected between the sliding frame 11 and bracket 2, along with a rotating handwheel 103 for rotational adjustment. Furthermore, guide rails 101 can be configured to ensure smoother and more stable lifting. Of course, the lifting mechanism can also utilize other structural forms, without limitation.

[0058] In order to test the center position of the light beam signal fiber 1 after passing through the tube, it can also include a focusing component 171 arranged in the direction of the optical fiber passing through the tube and located behind the tube passing component. The focusing component 171 includes a focusing lens group and an offset measuring disk 172 arranged along the direction of the optical fiber passing through the tube. The disk surface of the offset measuring disk 172 is provided with a scale.

[0059] The focusing assembly 171 is used to focus the test light transmitted through the optical fiber bundle 6 and focus it onto the offset measurement disk 172. By determining whether the position of the light spot on the offset measurement disk 172 after focusing is in the center, it can be determined whether the pipe threading is qualified. The scale on it is used to measure whether the light spot is in the center and the offset amount.

[0060] In the specific implementation process, combined with Figure 12 and Figure 13 As shown, the focusing assembly 171 also includes the third bracket 17 fixed relative to the fixture 13. The focusing lens assembly and offset measurement disk 172 are mounted on the third bracket 17. The focusing assembly 171 can be a focusing lens 18 mounted on the lens bracket. Multiple focusing lenses 18 can be provided as needed or in accordance with the circumstances, and are not limited thereto. The offset measurement disk 172 is also mounted on the third bracket 17 via a bracket.

[0061] Combine Figure 2 As shown, before the fiber bundle 6 is threaded through the tube, the output fiber of the red light source 20 is fused to a cladding stripper 19 and then to the signal fiber 1 of the fiber bundle 6, ensuring that the red light input to the signal fiber 1 is the core red light. The fiber bundle 6 is straightened and allowed to hang naturally, ensuring that the signal fiber 1 is centered in the bundle 6. At this point, red light is introduced into the core of the signal fiber 1. The red light passes through the lower quartz tube 14 and the focusing lens to the bottom offset measurement disk 172. The position of the three-dimensional translation stage 12, the movable body, and the focusing lens are adjusted to ensure that the red light spot is clearly focused at the center of the bottom disk. The threading process is then continued. The light spot position is observed to see if it deviates. If so, it indicates that the signal fiber 1 has been deviated due to force, and the threading needs to be repeated until the threading is successful and no deviation occurs during or at the end.

[0062] As the space between optical fibers gradually becomes smaller, they will interact with each other and cause bending and offset. The changes in the optical fibers in the tube cannot be observed during manual or mechanical operations. Often, the only way to determine whether the tube insertion is successful is to observe the position of the signal fiber 1 at the cut end face after the tube insertion, taper pulling and cutting. However, at this time, the fiber bundle 6 has been melted and the signal fiber 1 can only be remade if it is offset. Therefore, detecting whether the center position of the signal fiber 1 is offset during the tube insertion process can effectively improve the yield rate of the pump combiner and reduce the production cost. Figure 15 As shown, there are two cases of offset, one is complete offset and the other is partial offset. Both cases will affect the pass rate of the optical fiber bundle 6 in the tube.

[0063] In actual use, combined with Figure 2 As shown, the optical fiber fixing assembly can be placed on the test platform through bracket 1 5, and the pipe threading assembly can be placed on another test platform at a lower height through bracket 2 10, which makes it easier to thread the optical fiber bundle 6.

[0064] In summary, a fiber optic bundle threading device according to an embodiment of the present application can realize the precise and flexible threading of the fiber optic bundle 6 through the quartz tube 14, and through the pressure detection device and the red light detection method, it realizes the measurement of the force on the fiber optic bundle 6 and the deviation of the signal fiber 1 during the threading process, thereby ensuring the reliability of the threading.

[0065] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A fiber bundle threading device, characterized in that: The invention comprises an optical fiber fixing assembly and a tube insertion assembly arranged along the direction of optical fiber tube insertion, wherein the optical fiber fixing assembly comprises a threading component (7) for an optical fiber bundle (6) to pass through, and the threading component (7) is provided with a plurality of wiring holes for each optical fiber of the optical fiber bundle (6) to pass through; and the tube insertion assembly comprises a clamp (13) for installing an optical fiber sleeve and movable in the direction of optical fiber tube insertion, and the clamp (13) is provided with a detection device for detecting the pressure of the optical fiber tube insertion.

2. The optical fiber bundle threading device according to claim 1, characterized in that: One end of the threading member (7) is a tapered structure that is nested with the optical fiber sleeve, and the hole spacing between the plurality of wiring holes gradually decreases toward the tapered end.

3. The optical fiber bundle threading device according to claim 2, characterized in that: The plurality of wiring holes include a central hole (72) and a plurality of peripheral holes (71) evenly distributed around the central hole (72); the diameter of the central hole (72) is greater than or equal to the outer diameter of the core of the signal fiber (1) in the optical fiber bundle (6).

4. The optical fiber bundle threading device according to claim 2, characterized in that: The threading member (7) is provided with an annular elastic member for binding the optical fiber bundle (6) at the tapered end of the threading member (7).

5. The optical fiber bundle threading device according to claim 1, characterized in that: The optical fiber fixing assembly further comprises a bracket (5) and a pressing member, wherein the threading member (7) and the pressing member for pressing and fixing the optical fiber bundle (6) are arranged on the bracket (5).

6. The optical fiber bundle threading device according to claim 1, characterized in that: The clamp (13) is an annular clamp (132), and a detection device is provided on the inner side of the annular clamp (132). The detection device is a flexible detection device (151) and is externally connected to a pressure display (152).

7. The optical fiber bundle threading device according to claim 1, characterized in that: The tube threading assembly further comprises a multidirectional adjustment assembly, and the clamp (13) is arranged on the multidirectional adjustment assembly so as to adjust the position of the optical fiber sleeve on the clamp (13) in the optical fiber tube threading direction through the multidirectional adjustment assembly.

8. The optical fiber bundle threading device according to claim 7, characterized in that: The pipe threading assembly further comprises a second bracket (10), the multi-directional adjustment assembly is arranged on the second bracket (10) via a lifting mechanism, and the adjustment direction of the multi-directional adjustment assembly comprises at least one of an X direction, a Y direction and a Z direction.

9. The optical fiber bundle threading device according to claim 1, characterized in that: The invention also includes a focusing assembly (171) arranged in the direction of the optical fiber passing through the tube and located behind the tube passing assembly. The focusing assembly (171) includes a focusing lens group arranged along the direction of the optical fiber passing through the tube and an offset measuring disk (172). The disk surface of the offset measuring disk (172) is provided with a scale.

10. The optical fiber bundle threading device according to claim 9, characterized in that: The focusing assembly (171) further comprises a bracket three (17) fixedly arranged relative to the clamp (13), and the focusing lens group and the offset measuring disk (172) are arranged on the bracket three (17).

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