Cable core back-twisting device and cable core thereof

Abstract

The invention relates to the technical field of optical fibers, and discloses a cable core back-twisting device and a cable core thereof, and the cable core back-twisting device comprises a main frame, a back-twisting assembly, a pay-off assembly and the cable core; the main frame comprises first plate bodies which extend along a first direction and are arranged at intervals and second plate bodies which extend along a second direction and are arranged at intervals, and the first plate bodies and the second plate bodies are connected with each other to form an untwisting space for placing a cable core; the back-twisting assembly is arranged in the back-twisting space and comprises a back-twisting frame and first rotating shafts, the back-twisting frame is arranged in the back-twisting space in the first direction, the two ends of the back-twisting frame are connected with the first rotating shafts correspondingly, and the end, away from the back-twisting frame, of each first rotating shaft is rotationally connected with the second plate body; the pay-off assembly is arranged in the back-twist frame and comprises a second rotating shaft and a reel, the second rotating shaft is arranged in the back-twist frame in the second direction, the reel is arranged on the periphery of the second rotating shaft in a sleeving mode, one end of the cable core is wound around the periphery of the reel, and the other end of the cable core extends out of the back-twist space.

Description

Technical Field

[0001] The invention relates to the technical field of optical fibers, in particular to a cable core back-twisting device and a cable core thereof. Background Art

[0002] With the continuous development of fiber grating sensor systems, the application scope of fiber grating sensor systems in large-span cables, intelligent cables and environmental monitoring is becoming wider and wider, and the demand is increasing. The fiber grating sensor system includes a display unit and a cable core. The performance of the cable core will directly affect the monitoring operation of the fiber grating sensor system. The monitoring of the performance of the cable core is particularly important. Once the cable is damaged, the usability and durability of the structure will be reduced, and it may cause catastrophic sudden damage accidents to some load-bearing structures.

[0003] At present, the cable core in the existing fiber grating sensor intelligent monitoring system is grooved on the surface of one or more metal wire units, and the fiber grating sensor is glued to the metal wire unit surface groove of the cable core with glue, or the fiber grating sensor intelligent monitoring system is wrapped around the surface of the cable core. The method of gluing the fiber grating sensor into the cable with glue has high requirements for the glue used, and the fiber grating sensor in the cable will become brittle and hard after the glue solidifies, and it is easy to break when subjected to external force and cannot play a detection role. In the actual production process, the step of gluing glue cannot be automated at present, and manual gluing is required, the production efficiency is low, and it is not suitable for batch production; the method of wrapping the fiber grating sensor intelligent monitoring system on the surface of the cable is easy to be squeezed by external force during the cable production and actual application process, resulting in the fiber grating being stressed, and the survival rate is relatively low, and it cannot play a role in long-term monitoring. At the same time, most of the intelligent sensing monitoring unit pay-off devices use the cable core take-up machine to passively pay-off and twist, and the wire is pulled by the power of the take-up machine, and the speed is uncontrollable. The fiber release speed of this back-twisting method is completely dependent on the strength of the operator or the take-up machine, and the speed cannot be controlled. It is only suitable for scenarios with low requirements for speed and accuracy and simple wire-releasing tasks. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the prior art, the fiber optic grating sensor is mostly fixed to the cable core by bonding and winding, which has low production efficiency and is easily affected by external forces. At the same time, the existing cable core back-twisting device cannot control the back-twisting speed.

[0005] In order to solve the above technical problems, the present invention provides a cable core detwist device, which includes a main frame, a detwist assembly, a pay-off assembly and a cable core; the main frame includes a first plate body extending in a first direction and spaced apart from each other and a second plate body extending in a second direction and spaced apart from each other, the first plate body and the second plate body are connected to each other to form a detwist space for placing the cable core; the detwist assembly is arranged in the detwist space, the detwist assembly includes a detwist frame and a first rotating shaft, the detwist frame is arranged in the detwist space along the first direction, and both ends of the detwist frame are respectively connected to the first rotating shaft, and each first rotating shaft is away from One end of the detwist frame is rotatably connected to the second plate body; the pay-off assembly is arranged in the detwist frame, and the pay-off assembly includes a second rotating shaft and a reel, the second rotating shaft is arranged in the detwist frame along the second direction, the reel is sleeved on the outer circumference of the second rotating shaft, one end of the cable core is wound around the outer circumference of the reel, and the other end passes through the second plate body and extends outside the detwist space; wherein, the first rotating shaft rotates along the first direction, drives the detwist frame to rotate along the first direction, and then drives the cable core to rotate along the first direction to eliminate the vertical torque of the cable core, and the reel rotates along the second direction, drives the cable core to rotate along the second direction to eliminate the horizontal torque of the cable core.

[0006] In one embodiment, the back-twist assembly further includes a first motor, which is disposed at one end of the second plate body away from the back-twist space, and a power output end of the first motor passes through the second plate body and is connected to the first rotating shaft to drive the first rotating shaft to rotate in a first direction.

[0007] In one embodiment, the tray includes support plates, which are respectively arranged at two ends of the tray, and the outer edge diameter of the support plates is larger than the outer edge diameter of the tray.

[0008] In one embodiment, the pay-off assembly further includes a second motor, which is disposed at an end of the support plate away from the reel, and a power output end of the second motor is connected to the reel for driving the reel to rotate in a second direction.

[0009] In one embodiment, the second motor is disposed in a control module, and the control module is used to control the rotation speed of the plate.

[0010] In one embodiment, the main frame also includes a multi-groove guide wheel group, which is arranged on the second plate body, and the multi-groove guide wheel group is located at one end of the back-twist space away from the first motor, and one end of the cable core passes through the second plate body through the multi-groove guide wheel group.

[0011] Based on the cable core untwisting device, the present invention further provides a cable core, comprising a metal worm wire, an outer sheath, a spiral armor layer and a fiber grating arranged in sequence from outside to inside, wherein a plurality of vibration dampers are arranged around the circumference of the fiber grating.

[0012] In one embodiment, the outer sheath is made of insulating material.

[0013] In one embodiment, there are multiple metal twisted wires, and the multiple metal twisted wires are arranged around the circumference of the fiber grating. The material of the metal twisted wires is aluminum material.

[0014] Compared with the prior art, the cable core detwist device and the cable core of the embodiment of the present invention have the following beneficial effects: 1) Detwist assembly, the detwist assembly includes a detwist frame and a first rotating shaft, the detwist frame is arranged in the detwist space along the first direction, and its two ends are respectively connected to the first rotating shaft, and one end of each first rotating shaft away from the detwist frame is rotatably connected to the second plate. The detwist frame rotates along the first direction, which effectively reduces the incomplete release of the vertical torque of the cable core caused by the inconsistent rate generated by artificial detwist, causing the fiber grating to be affected by external force, and reducing the service life of the cable core; 2) Pay-off assembly, the pay-off assembly includes a second rotating shaft and a reel, the reel rotates along the second direction under the drive of the second rotating shaft, and then drives the cable core to rotate in the same direction, and this rotation method effectively eliminates the torque of the cable core in the horizontal direction; the present invention effectively solves the technical problems that the cable core in the prior art is mostly fixed with the fiber grating sensor by bonding and winding, which has low production efficiency and is easily affected by external forces, and at the same time, the existing cable core detwist device cannot realize the control of the detwist speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a cable core back-twisting device according to an embodiment of the present invention.

[0016] Figure 2 It is a schematic structural diagram of a cable core according to an embodiment of the present invention.

[0017] In the figure, 1. main frame; 11. first plate body; 12. second plate body; 13. multi-groove guide wheel group; 2. back-twist assembly; 21. back-twist frame; 22. first rotating shaft; 23. first motor; 3. pay-off assembly; 31. second rotating shaft; 32. reel; 33. support plate; 34. second motor; 4. cable core; 41. metal reamer; 42. outer sheath; 43. spiral armor layer; 44. optical fiber grating; 45. vibration damping body. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0022] like Figure 1As shown, an embodiment of the present invention preferably provides a cable core detwist device, which includes a main frame 1, a detwist assembly 2, a pay-off assembly 3 and a cable core 4; the main frame 1 includes a first plate body 11 extending in a first direction and spaced apart from each other and a second plate body 12 extending in a second direction and spaced apart from each other, the first plate body 11 and the second plate body 12 are connected to each other to form a detwist space for placing the cable core 4; the detwist assembly 2 is arranged in the detwist space, the detwist assembly 2 includes a detwist frame 21 and a first rotating shaft 22, the detwist frame 21 is arranged in the detwist space along the first direction, and both ends of the detwist frame 21 are respectively connected to the first rotating shaft 22, and each first rotating shaft 22 is away from the detwist frame 2 1 is rotatably connected to the second plate body 12; the pay-off assembly 3 is arranged in the detwisting frame 21, and the pay-off assembly 3 includes a second rotating shaft 31 and a reel 32, the second rotating shaft 31 is arranged in the detwisting frame 21 along the second direction, the reel 32 is sleeved on the outer periphery of the second rotating shaft 31, one end of the cable core 4 is wound around the outer periphery of the reel 32, and the other end passes through the second plate body 12 and extends to the outside of the detwisting space; wherein, the first rotating shaft 22 rotates along the first direction, drives the detwisting frame 21 to rotate along the first direction, and then drives the cable core 4 to rotate along the first direction to eliminate the vertical torque of the cable core 4, and the reel 32 rotates along the second direction, drives the cable core 4 to rotate along the second direction to eliminate the horizontal torque of the cable core 4.

[0023] Based on the above technical features, the present invention is provided with a back-twist assembly 2, the back-twist assembly 2 includes a back-twist frame 21 and a first rotating shaft 22, the back-twist frame 21 is provided in the back-twist space along the first direction, and its two ends are respectively connected to the first rotating shaft 22, and one end of each first rotating shaft 22 away from the back-twist frame 21 is rotationally connected to the second plate 12. The back-twist frame 21 rotates along the first direction, which effectively reduces the incomplete release of the vertical torque of the cable core 4 caused by the inconsistent rate generated by artificial back-twist, causing the fiber grating 44 to be affected by external force, and reducing the service life of the cable core 4; through the setting of the pay-off assembly 3, the pay-off assembly 3 includes a second rotating shaft 31 and a reel 32, and the reel 32 rotates along the second direction under the drive of the second rotating shaft 31, thereby driving the cable core 4 to rotate in the same direction, and this rotation method effectively eliminates the torque of the cable core 4 in the horizontal direction.

[0024] As some embodiments of the present invention, Figure 1 As shown, the back-twist assembly 2 further includes a first motor 23, which is disposed at one end of the second plate 12 away from the back-twist space, and the power output end of the first motor 23 passes through the second plate 12 and is connected to the first rotating shaft 22 to drive the first rotating shaft 22 to rotate in the first direction. Such a layout not only ensures the stable operation of the first motor 23, but also avoids interference with other components in the back-twist space. The power output end of the first motor 23 passes through the second plate 12 and is connected to the first rotating shaft 22. This connection method ensures that the first motor 23 can directly drive the first rotating shaft 22 to rotate in the first direction.

[0025] As some embodiments of the present invention, Figure 1 As shown, the tray 32 includes support plates 33, which are respectively arranged at both ends of the tray 32, and the outer diameter of the support plates 33 is larger than the outer diameter of the tray 32. Through the arrangement of the support plates 33, the outer diameter of the support plates 33 is larger than the outer diameter of the tray 32, and the larger area of ​​the support plates 33 can more effectively disperse the weight of the tray 32 and the items carried thereon, thereby enhancing the overall stability.

[0026] As some embodiments of the present invention, Figure 1 As shown, the pay-off assembly 3 further includes a second motor 34, which is disposed at one end of the support plate 33 away from the reel 32, and the power output end of the second motor 34 is connected to the reel 32 for driving the reel 32 to rotate in the second direction. By disposing the second motor 34, the second motor 34 is located at one end of the support plate 33 away from the reel 32, and the power output end of the second motor 34 is connected to the reel 32 for driving the reel 32 to rotate in the second direction. This rotation method effectively eliminates the torsion of the cable core 4 in the horizontal direction and ensures the stability and continuity of the cable core 4 during the pay-off process.

[0027] As some embodiments of the present invention, Figure 1 As shown, the second motor 34 is provided in a control module, and the control module is used to control the rotation speed of the reel 32. Through the setting of the control module, the rotation speed of the reel 32 is effectively controlled, and then the pay-off speed is accurately controlled. When the pay-off tension of the cable core 4 changes, it can be adjusted in real time to keep the tension constant, ensuring that the cable core 4 will not be twisted too tight or too loose.

[0028] As some embodiments of the present invention, Figure 1 As shown, the main frame 1 further includes a multi-groove guide wheel set 13, which is arranged on the second plate body 12, and the multi-groove guide wheel set 13 is located at one end of the back-twist space away from the first motor 23, and one end of the cable core 4 passes through the second plate body 12 through the multi-groove guide wheel set 13. Through the arrangement of the multi-groove guide wheel set 13, when the pay-off speed of the device changes, the multi-groove guide wheel set 13 can play a buffering role, preventing the detection function of the sensing unit of the fiber grating 44 without excess length from being damaged due to force, and the yield rate of the optical unit can be increased to 98%.

[0029] Based on the above cable core 4 back-twisting device, as Figure 2As shown, the present invention also provides a cable core 4, which includes a metal reamed wire 41, an outer sheath 42, a spiral armor layer 43 and a fiber Bragg grating 44 arranged in sequence from the outside to the inside, and a plurality of vibration dampers 45 are wound around the fiber Bragg grating 44. The combination of the metal reamed wire 41, the outer sheath 42 and the spiral armor layer 43 provides strong protection and support for the cable core 4, enabling it to withstand various harsh environments and mechanical stresses. The introduction of the fiber Bragg grating 44 enables the cable core 4 to monitor parameters such as temperature and strain in real time, providing important data support for the use and maintenance of the cable core 4. The winding of multiple vibration dampers 45 effectively improves the vibration resistance of the cable core 4 and protects the integrity and performance of the fiber Bragg grating 44.

[0030] As some embodiments of the present invention, Figure 2 As shown, the outer sheath 42 is made of insulating material. As a key protective layer, the outer sheath 42 is made of insulating material, which effectively ensures the safety and stability of the cable core 4 during transmission.

[0031] As some embodiments of the present invention, Figure 2 As shown, there are multiple metal strands, and multiple metal strands are arranged around the circumference of the fiber grating 44, and the material of the metal strands is aluminum. Multiple aluminum metal strands arranged around the circumference of the fiber grating 44 are an important feature of the design of the cable core 4. This design not only enhances the mechanical strength of the cable core 4, but also improves its overall performance and stability. The metal strands made of aluminum material have the characteristics of light weight, high strength, good conductivity and corrosion resistance, which further improves the service life of the cable core 4.

[0032] In summary, the embodiments of the present invention provide a cable core detwist device and a cable core thereof, which have the following beneficial effects compared with the prior art: 1) a detwist assembly 2, the detwist assembly 2 includes a detwist frame 21 and a first rotating shaft 22, the detwist frame 21 is arranged in the detwist space along the first direction, and its two ends are respectively connected to the first rotating shaft 22, and each end of the first rotating shaft 22 away from the detwist frame 21 is rotatably connected to the second plate body 12. The detwist frame 21 rotates in the first direction, effectively reducing the incomplete release of the vertical torque of the cable core 4 caused by the inconsistent rate of artificial detwist, causing the fiber grating 44 to be affected by external forces, reducing the service life of the cable core 4; 2) the pay-off assembly 3, the pay-off assembly 3 includes a second rotating shaft 31 and a reel 32, the reel 32 rotates in the second direction under the drive of the second rotating shaft 31, and then drives the cable core 4 to rotate in the same direction. This rotation method effectively eliminates the torque of the cable core 4 in the horizontal direction; 3) the cable core 4, the outer sheath 42, the spiral armor layer 43, and the vibration damping body 45 are used to perform triple protection on the fiber grating 44, avoiding the brittle fracture of the optical fiber grating 44 caused by external forces, ensuring the monitoring quality, and ensuring the service life of the fiber grating 44. The present invention effectively solves the technical problems that the cable core 4 in the prior art is mostly fixed with the fiber grating 44 sensor by bonding and winding, which has low production efficiency and is easily affected by external forces. At the same time, the existing cable core 4 detwist device cannot realize the control of the detwist speed.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A cable core back-twisting device, characterized in that: It includes a main frame, a back-twist assembly, a pay-off assembly and a cable core; The main frame comprises a first plate extending in a first direction and spaced apart from each other, and a second plate extending in a second direction and spaced apart from each other, wherein the first plate and the second plate are connected to each other to form a back-twisting space for placing a cable core; The back-twist assembly is arranged in the back-twist space, and the back-twist assembly includes a back-twist frame and a first rotating shaft. The back-twist frame is arranged in the back-twist space along a first direction, and both ends of the back-twist frame are respectively connected to the first rotating shaft, and one end of each first rotating shaft away from the back-twist frame is rotatably connected to the second plate body; The pay-off assembly is arranged in the detwisting frame, and the pay-off assembly includes a second rotating shaft and a reel, the second rotating shaft is arranged in the detwisting frame along the second direction, the reel is connected to the second rotating shaft, one end of the cable core is wound around the outer circumference of the reel, and the other end passes through the second plate body and extends to the outside of the detwisting space; Among them, the first rotating shaft rotates along the first direction, driving the detent frame to rotate along the first direction, and then driving the cable core to rotate along the first direction to eliminate the vertical torsion of the cable core, and the disc rotates along the second direction, driving the cable core to rotate along the second direction to eliminate the horizontal torsion of the cable core.

2. The cable core back-twisting device according to claim 1, characterized in that: The back-twist assembly also includes a first motor, which is arranged at one end of the second plate body away from the back-twist space, and a power output end of the first motor passes through the second plate body and is connected to the first rotating shaft to drive the first rotating shaft to rotate along the first direction.

3. The cable core back-twisting device according to claim 2, characterized in that: The tray comprises support plates, which are respectively arranged at two ends of the tray, and the outer edge diameter of the support plates is larger than the outer edge diameter of the tray.

4. The cable core back-twisting device according to claim 3, characterized in that: The pay-off assembly also includes a second motor, which is disposed at an end of the support plate away from the reel, and a power output end of the second motor is connected to the reel for driving the reel to rotate in a second direction.

5. The cable core back-twisting device according to claim 4, characterized in that: The second motor is arranged inside a control module, and the control module is used to control the rotation speed of the plate.

6. The cable core back-twisting device according to claim 5, characterized in that: The main frame also includes a multi-groove guide wheel group, which is arranged on the second plate body and located at one end of the back-twist space away from the first motor. One end of the cable core passes through the second plate body through the multi-groove guide wheel group.

7. A cable core, characterized in that: The invention comprises a metal reamer, an outer sheath, a spiral armor layer and an optical fiber grating which are arranged in sequence from the outside to the inside. A plurality of vibration damping bodies are arranged around the circumference of the optical fiber grating.

8. The cable core according to claim 7, characterized in that: The outer sheath is made of insulating material.

9. The cable core according to claim 7, characterized in that: There are multiple metal twisted wires, which are arranged around the circumference of the fiber grating. The metal twisted wires are made of aluminum.

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