An apparatus for manufacturing a metal conductor embedded in an optical fiber

Abstract

The application relates to a metal conductor embedded with an optical fiber manufacturing device and belongs to the technical field of intelligent conductor manufacturing. The metal conductor embedded with an optical fiber manufacturing device comprises a shell sealedly connected with a top cover and a bottom disc at two ends, a heating device and a hydraulic pressing device are arranged in the shell, and a vacuum pumping system is arranged outside the shell; when the vacuum pumping system and the heating device are started, the optical fiber is embedded between the inner copper strip and the outer copper strip when the temperature of the heating layer main body is 550 DEG C-600 DEG C, the hydraulic device is started to press the inner copper strip on the outer copper strip, the piston rod of the hydraulic cylinder pushes the hydraulic ring surface to make the pressure 15MPa and keep for 3 hours, the outer copper strip and the inner copper strip are synthesized into an integral whole, and the copper strip embedded with the optical fiber is formed; the packaging reliability is good, the process is simple, the cost is low, the optical fiber is efficiently and reliably embedded into the metal conductor, and a conductor structure with intelligent sensing capability is formed.

Description

Technical Field

[0001] This invention belongs to the field of fiber optic grating manufacturing technology, specifically relating to a metal conductor manufacturing device for embedding optical fibers. Background Technology

[0002] Optical fiber, as a novel passive sensor, can be used to measure physical quantities such as temperature, pressure, and strain. Due to its many advantages, including simple structure, small size, light weight, high sensitivity, resistance to electromagnetic interference, and insensitivity to light intensity fluctuations, embedding optical fiber as a sensor in a metallic conductor is a practically valuable method for sensing the state of a metallic conductor.

[0003] Traditional composite processes of metallic conductors and optical fibers have the following problems:

[0004] 1. Poor packaging reliability: When using adhesive or surface mounting methods, optical fibers are susceptible to environmental factors (such as high temperature and corrosion), leading to failure.

[0005] 2. Low structural compatibility: The thermal expansion coefficients of optical fibers and metal conductors differ greatly, making them prone to stress fracture under extreme conditions;

[0006] 3. Lack of detection function: It is unable to monitor parameters such as internal temperature and stress of the conductor in real time, making it difficult to meet the needs of superconducting quench detection and structural health monitoring.

[0007] In the prior art, patent CN104152901B discloses a method for embedding fiber Bragg gratings into a metal substrate through a combination of chemical plating and electroplating, but this method suffers from complex processes and high costs. Patent CN117492140A proposes an embedded fiber optic splicing device, but it is only suitable for cable splicing scenarios and cannot achieve continuous production. Therefore, there is an urgent need for an efficient and reliable manufacturing equipment for embedded fiber optic metal conductors. Summary of the Invention

[0008] Based on the problems existing in the above-mentioned background technology, the present invention proposes a metal conductor manufacturing equipment for embedding optical fibers, which solves the problems of poor packaging reliability, complex process and high cost of existing embedded optical fiber technology.

[0009] The embodiments of the present invention are implemented as follows:

[0010] This invention provides a metal conductor manufacturing apparatus for embedding optical fibers. The metal conductor for embedding optical fibers includes an outer copper strip, an optical fiber, and an inner copper strip. A mounting groove is formed along the length of one end face of the outer copper strip at the middle position of its length. An optical fiber is adhered in the mounting groove and is completely located inside the mounting groove. Multiple gratings of different wavelengths are etched on the optical fiber. One end face of the inner copper strip is pressed onto the end face of the outer copper strip with the mounting groove. One end of the optical fiber is located at one end of the outer copper strip and the inner copper strip, and the other end is located at the other end of the outer copper strip and the inner copper strip.

[0011] The metal conductor manufacturing equipment for embedding optical fibers includes a housing with openings at both ends and a hollow cylindrical structure. The top and bottom openings of the housing are sealed and detachably equipped with a top cover and a base. A heating device and a hydraulic pressing device are installed inside the housing. The heating device includes a heating layer body with a hollow cylindrical structure installed inside the housing. The top and bottom of the heating layer body are detachably connected to the top cover and the base, respectively. A molybdenum strip resistor is wound around the outer circumferential surface of the heating layer body. The molybdenum strip resistor is electrically connected to a heating power source outside the housing. A first spiral groove is provided on the inner circumferential surface of the heating layer body.

[0012] The hydraulic pressing device includes a hollow cylindrical structure comprising a hydraulic outer layer body and a hydraulic inner layer body disposed inside the heating layer body. The top and bottom of the hydraulic inner layer body and the hydraulic outer layer body are detachably connected to a top cover and a chassis, respectively. A hydraulic cavity is provided between the hydraulic inner layer body and the hydraulic outer layer body. Four hydraulic annular surfaces are provided between the hydraulic outer layer body and the heating layer body, forming a hydraulic tubular body. A second spiral groove is provided on the outer circumference of the hydraulic tubular body, and the positions of the first spiral groove and the second spiral groove correspond. A hydraulic drive component is provided on the outer circumference of the hydraulic outer layer body for pushing the four hydraulic annular surfaces toward the heating layer body and communicating with the hydraulic cavity.

[0013] The outer copper strip is spirally installed in the first spiral groove, and the inner copper strip is spirally installed in the second spiral groove.

[0014] Furthermore, the top cover and the chassis are both provided with a plurality of housing fastening holes through the circumference, and the two end faces of the housing are provided with a plurality of connecting threaded holes in the circumference. The housing fastening holes and the connecting threaded holes are aligned one-to-one, and each set of aligned housing fastening holes and connecting threaded holes is provided with a bolt fastener.

[0015] Both the top cover and the chassis have an outer shell sealing ring mounting groove on their inner end faces. Each of the two outer shell sealing ring mounting grooves contains a sealing ring, and the two end faces of the shell are in close contact with the sealing rings in the outer shell sealing ring mounting grooves.

[0016] Furthermore, the top cover and the chassis are both provided with a plurality of heating layer fastening holes, and the two end faces of the heating layer body are provided with a plurality of heating layer internal thread holes in a circumferential manner. The heating layer fastening holes and the heating layer internal thread holes are aligned one-to-one. Each set of aligned heating layer fastening holes and heating layer internal thread holes is provided with a bolt fastener.

[0017] Furthermore, the top cover and chassis are each provided with a plurality of hydraulic inner layer fastening holes and hydraulic outer layer fastening holes circumferentially. The two end faces of the hydraulic inner layer body and the hydraulic outer layer body are respectively provided with a plurality of hydraulic inner layer internal threaded holes and hydraulic outer layer internal threaded holes circumferentially. The plurality of hydraulic inner layer fastening holes are aligned one-to-one with the hydraulic inner layer internal threaded holes, and the plurality of hydraulic outer layer fastening holes are aligned one-to-one with the hydraulic outer layer internal threaded holes. Each set of aligned hydraulic inner layer fastening holes and hydraulic inner layer internal threaded holes, and each set of aligned hydraulic outer layer fastening holes and hydraulic outer layer internal threaded holes, is provided with bolt fasteners.

[0018] The inner end faces of the top cover and the chassis are each provided with a hydraulic inner layer sealing ring mounting groove and a hydraulic outer layer sealing ring mounting groove; sealing rings are installed in both the hydraulic inner layer sealing ring mounting groove and the hydraulic outer layer sealing ring mounting groove, and the two ends of the hydraulic inner layer body and the hydraulic outer layer body respectively abut against the sealing rings in the hydraulic inner layer sealing ring mounting groove and the hydraulic outer layer sealing ring mounting groove.

[0019] Furthermore, the hydraulic drive component includes a hydraulic power source and eight hydraulic cylinders communicating with the hydraulic chamber. Each hydraulic annular surface is matched with two vertically spaced hydraulic cylinders. The tail end of each hydraulic cylinder is fixedly connected to the outer circumferential wall of the hydraulic outer layer body, and the piston rod of each hydraulic cylinder is fixedly connected to the inner wall of the hydraulic annular surface. The hydraulic power source is located outside the housing and includes an oil reservoir, an oil injection motor, an oil injection valve, an oil discharge motor, an oil discharge valve, an oil injection pipe, and an oil discharge pipe. The chassis has a hydraulic oil inlet and a hydraulic oil outlet communicating with the hydraulic chamber. One end of the oil injection pipe and the oil discharge pipe are respectively connected to the hydraulic oil inlet and the hydraulic oil outlet, and the other end of the oil injection pipe and the oil discharge pipe are both connected to the oil reservoir. The oil injection valve is installed on the oil injection pipe and connected to the oil injection motor. The oil discharge valve is installed on the oil discharge pipe and connected to the oil discharge pipe.

[0020] Furthermore, the top cover is equipped with a vacuum system, which is connected to the space between the hydraulic outer layer body and the shell through a vacuum tube, and a through hole is provided on the heating layer body.

[0021] Furthermore, the shell, top cover, and chassis are all outer-inner-outer sandwich structures, with the outer layer being made of a material with good mechanical properties and the inner layer being made of a material with good thermal insulation properties.

[0022] The methods of using the equipment for manufacturing metal conductors with embedded optical fibers include:

[0023] Step 1.1: Make two copper strips of equal length, one outer and one inner;

[0024] Step 1.2: Fabricate an optical fiber longer than the outer and inner copper strips and etch multiple gratings of different wavelengths onto the optical fiber; for optical fibers that do not require gratings, step 1.2 can be skipped.

[0025] Step 1.3: Open a mounting groove along the length of the outer copper strip at the middle position of one end face, and attach the optical fiber in the mounting groove, with one end of the optical fiber inside the outer copper strip and the other end outside.

[0026] Step 1.4: Coil the outer copper strip in the first spiral groove and coil the inner copper strip in the second spiral groove;

[0027] Step 1.5: Start the vacuum system and heating device. When the temperature of the main body of the heating layer is 550℃~600℃, start the hydraulic pressing device. The piston rods of multiple hydraulic cylinders push the four hydraulic ring surfaces toward the hydraulic outer layer body until the inner copper strip is pressed onto the outer copper strip. The piston rods of the hydraulic cylinders push the hydraulic ring surfaces to make their pressure 15MPa and maintain it for 3 hours. The outer copper strip and the inner copper strip are tightly connected to form a copper strip with embedded optical fiber.

[0028] Step 1.6: Stop pressurizing and heating, inject air, open the top cover, and remove the copper strip embedded with the optical fiber.

[0029] The beneficial effects of this invention are as follows: The metal conductor manufacturing equipment for embedding optical fibers provided by this invention, by setting a heating device and a hydraulic pressing device, can press optical fibers between an outer copper strip and an inner copper strip under high temperature and high pressure, and the inner copper strip and the outer copper strip are integrated into a whole. Moreover, the process is simple and the cost is low, and it can efficiently and reliably embed optical fibers into metal conductors, thus solving the manufacturing problem of optical fiber intelligent sensing metal materials. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0031] Figure 1 This is a front view of the internal structure of a metal conductor manufacturing device for embedding optical fibers according to the present invention.

[0032] Figure 2 This is a schematic diagram of the horizontal cross-sectional structure of a metal conductor manufacturing device for embedding optical fibers according to the present invention.

[0033] Figure 3 This is a top view of the chassis.

[0034] Figure 4 This is a schematic diagram of a sandwich structure consisting of an outer layer, an inner layer, and an outer layer, with the shell, top cover, and chassis as the outer layer.

[0035] Figure 5 This is a schematic diagram of the three-dimensional structure of the shell.

[0036] Figure 6 This is a schematic diagram of the three-dimensional structure of the main body of the heating layer.

[0037] Figure 7 This is a three-dimensional structural diagram of the hydraulic inner layer.

[0038] Figure 8 This is a three-dimensional structural diagram of the hydraulic outer layer.

[0039] Figure 9 A front view schematic diagram of the hydraulic cylinder mounted on the outer circumferential wall of the hydraulic outer layer body.

[0040] Figure 10 A side view of the structure in which multiple hydraulic cylinders are mounted on the outer circumferential wall of the hydraulic outer layer body.

[0041] Figure 11 This is a schematic diagram of a single hydraulic cylinder.

[0042] Figure 12 This is a schematic diagram of the structure after the hydraulic tubular main body is unfolded.

[0043] Figure 13 This is a top view of the hydraulic pressing device.

[0044] Figure 14 This is a schematic diagram of a copper strip with embedded optical fibers.

[0045] Figure 15 A schematic diagram showing the structure in which the optical fiber is placed inside the outer copper strip.

[0046] The components are as follows: 1. Outer copper strip; 2. Optical fiber; 3. Inner copper strip; 4. Mounting groove; 5. Housing; 6. Top cover; 7. Chassis; 8. Heating device; 9. Hydraulic pressing device; 10. Heating layer body; 11. Molybdenum strip resistor; 12. Heating power supply; 13. Hydraulic inner layer body; 14. Hydraulic outer layer body; 15. Hydraulic cavity; 16. Hydraulic annular surface; 17. Hydraulic tubular body; 18. Second spiral groove; 19. Housing fastening hole; 20. Connecting threaded hole; 21. Outer shell sealing ring mounting groove; 22. Heating layer fastening hole; 23. Heating layer internal threaded hole; 24. Hydraulic inner layer fastening hole; 25. Hydraulic outer layer fastening hole. 26. Hydraulic inner layer internal threaded hole; 27. Hydraulic outer layer internal threaded hole; 28. Hydraulic inner layer sealing ring mounting groove; 29. ​​Hydraulic outer layer sealing ring mounting groove; 30. Hydraulic cylinder; 31. Oil reservoir; 32. Oil injection motor; 33. Oil injection valve; 34. Oil discharge motor; 35. Oil discharge valve; 36. Oil injection pipe; 37. Oil discharge pipe; 38. Hydraulic oil inlet; 39. Hydraulic oil outlet; 40. Vacuum system; 41. Through hole; 42. Outer layer; 43. Inner layer; 45. Cylinder body; 46. Inner side of cylinder body; 47. Outer side of cylinder body; 48. Piston; 49. Piston sealing assembly; 50. End cap; 51. Piston rod; 52. Reserved hole. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0051] This invention provides a manufacturing apparatus for a metal conductor with embedded optical fiber. Please refer to [link / reference]. Figure 14 and Figure 15As shown, the metal conductor with embedded optical fiber includes an outer copper strip 1, an optical fiber 2, and an inner copper strip 3. A mounting groove 4 is formed along the length of the middle position of one end face of the outer copper strip 1. An optical fiber 2 is attached to the mounting groove 4 and is completely located inside the mounting groove 4. Multiple gratings with different wavelengths are etched on the optical fiber 2. One end face of the inner copper strip 3 is pressed onto the end face of the outer copper strip 1 with the mounting groove 4. One end of the optical fiber 2 is located at one end of the outer copper strip 1 and the inner copper strip 3, and the other end is located at the other end of the outer copper strip 1 and the inner copper strip 3.

[0052] like Figure 1 and Figure 2 As shown, the metal conductor manufacturing equipment for embedding optical fibers includes a housing 5 with openings at both ends and a hollow cylindrical structure. The top and bottom openings of the housing 5 are sealed and detachably provided with a top cover 6 and a base 7. A heating device 8 and a hydraulic pressing device 9 are provided inside the housing 5. The heating device 8 includes a heating layer body 10 with a hollow cylindrical structure disposed inside the housing 5. The top and bottom of the heating layer body 10 are detachably connected to the top cover 6 and the base 7, respectively. A molybdenum strip resistor 11 is wound around the outer circumferential surface of the heating layer body 10. The molybdenum strip resistor 11 is electrically connected to a heating power supply 12 outside the housing 5. A first spiral groove is provided on the inner circumferential surface of the heating layer body 10.

[0053] The hydraulic pressing device 9 includes a hollow cylindrical structure, comprising a hydraulic outer layer body 14 and a hydraulic inner layer body 13 disposed inside the heating layer body 10. The top and bottom of the hydraulic inner layer body 13 and the hydraulic outer layer body 14 are detachably connected to the top cover 6 and the chassis 7, respectively. A hydraulic cavity 15 is provided between the hydraulic inner layer body 13 and the hydraulic outer layer body 14. Four hydraulic annular surfaces 16 are provided between the hydraulic outer layer body 14 and the heating layer body 10, forming a hydraulic tubular body 17. Figure 12 As shown, a second spiral groove 18 is provided on the outer circumference of the hydraulic tubular body 17, and the positions of the first spiral groove and the second spiral groove 18 correspond; a hydraulic drive component is provided on the outer circumference of the hydraulic outer body 14 for pushing the four hydraulic annular surfaces 16 toward the heating layer body 10 and communicating with the hydraulic cavity 15; the outer copper strip 1 is coiled and installed in the first spiral groove, and the inner copper strip 3 is coiled and installed in the second spiral groove 18.

[0054] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, 16 housing fastening holes 19 are circumferentially arranged on both the top cover 6 and the chassis 7. 16 connecting threaded holes 20 are circumferentially arranged on both end faces of the housing 5. The housing fastening holes 19 and the connecting threaded holes 20 are aligned one-to-one. Each set of aligned housing fastening holes 19 and connecting threaded holes 20 contains a bolt fastener, which integrates the housing 5 with the top cover 6 and chassis 7 into a single unit. A ring of outer shell sealing ring mounting grooves 21 is provided on the inner end faces of both the top cover 6 and the chassis 7. A sealing ring is installed in each of the two rings of outer shell sealing ring mounting grooves 21. The end faces of the housing 5 are in close contact with the sealing rings in the outer shell sealing ring mounting grooves 21, ensuring a seal at the interface between the housing 5 and the top cover 6 and chassis 7. Specifically, both the top cover 6 and the chassis 7 have pre-drilled holes. The pre-drilled hole on the top cover 6 is used to install a vacuum system 40; the pre-drilled hole on the chassis 7 is used for the cable of the heating power supply 12.

[0055] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, 16 heating layer fastening holes 22 are circumferentially arranged on both the top cover 6 and the chassis 7. 16 internal threaded holes 23 are circumferentially arranged on both end faces of the heating layer body 10. The heating layer fastening holes 22 and the internal threaded holes 23 are aligned one-to-one. Each set of aligned heating layer fastening holes 22 and internal threaded holes 23 contains a bolt fastener. The bolt fasteners combine the heating layer body 10 with the top cover 6 and the chassis 7 into a single unit. A molybdenum strip resistor 11 is used for heating, and an alumina ceramic tube is used to insulate the molybdenum strip resistor 11 from the heating layer body 10.

[0056] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, both the top cover 6 and the chassis 7 are provided with a plurality of hydraulic inner layer fastening holes 24 and hydraulic outer layer fastening holes 25 circumferentially. In this embodiment, the number of hydraulic inner layer fastening holes 24 and hydraulic outer layer fastening holes 25 is 16. The two end faces of the hydraulic inner layer body 13 and the hydraulic outer layer body 14 are respectively provided with 16 hydraulic inner layer internal threaded holes 26 and hydraulic outer layer internal threaded holes 27 circumferentially. The plurality of hydraulic inner layer fastening holes 24 and hydraulic inner layer internal threaded holes 26 are aligned one-to-one, and the hydraulic outer layer fastening holes 25 and hydraulic outer layer internal threaded holes 27 are aligned one-to-one. Each group of aligned hydraulic inner layer fastening holes 24 and hydraulic inner layer internal threaded holes 26 and each group of aligned hydraulic outer layer fastening holes 25 and hydraulic outer layer internal threaded holes 27 are provided with bolt fasteners. The bolt fasteners combine the hydraulic inner layer body 13, hydraulic outer layer body 14, top cover 6, and chassis 7 into a whole.

[0057] Both the top cover 6 and the chassis 7 have a hydraulic inner layer sealing ring mounting groove 28 and a hydraulic outer layer sealing ring mounting groove 29 on their inner end faces. Sealing rings are installed in both the hydraulic inner layer sealing ring mounting groove 28 and the hydraulic outer layer sealing ring mounting groove 29. The two ends of the hydraulic inner layer body 13 and the hydraulic outer layer body 14 are in tight contact with the sealing rings in the hydraulic inner layer sealing ring mounting groove 28 and the hydraulic outer layer sealing ring mounting groove 29, respectively. The sealing rings ensure a seal between the hydraulic inner layer and the hydraulic outer layer body 14 and the interfaces of the top cover 6 and the chassis 7.

[0058] Furthermore, such as Figure 1 , Figure 9 , Figure 10 , Figure 12 , Figure 13 As shown, the hydraulic drive component includes a hydraulic power source and eight hydraulic cylinders 30 communicating with the hydraulic chamber 15. Each hydraulic annular surface 16 is matched with two vertically spaced hydraulic cylinders 30. The tail end of each hydraulic cylinder 30 is fixedly connected to the outer circumferential wall of the hydraulic outer layer body 14, and the piston rod of each hydraulic cylinder 30 is fixedly connected to the inner wall of the hydraulic annular surface 16. Specifically, as an implementation of a single hydraulic cylinder 30, such as... Figure 11 As shown, the hydraulic cylinder 30 consists of a cylinder body 45, a piston 48, a piston sealing assembly 49, a piston rod 51, and an end cap 20. The cylinder body 45 is tubular, and its inner side 46 is welded to the hydraulic inner layer body 13 to form a single unit, maintaining a seal. Hydraulic oil can enter the cylinder body 45 through the inner side of the hydraulic inner layer body 13 without leakage. The outer side 47 of the cylinder body has external threads, which match the internal threads of the end cap 50. The end cap 50 is cap-shaped, with internal threads on one side that match the external threads on the outer side 47 of the cylinder body. During installation, it is tightly fitted onto the cylinder body. 45 is on the top; the other side is a perforated cap top; the hole diameter is slightly larger than the outer diameter of piston rod 51 and slightly smaller than the outer diameter of piston 48; the piston rod is cylindrical; the outer diameter is slightly smaller than the outer diameter of the hole in the middle of the end cap 50, one side passes through the hole in the middle of the end cap top, and the other side is welded to piston 48; piston 48 is axially aligned with piston rod 51, is cylindrical, and its outer diameter is slightly smaller than the inner diameter of the cylinder and slightly larger than the outer diameter of piston rod 51; there are multiple sealing component mounting grooves 4 on the side of the piston; piston sealing components 49 are connected in the mounting grooves 4 on the side of piston 48 to keep the piston 48 and cylinder 45 sealed.

[0059] like Figure 1As shown, the hydraulic power source is located outside the housing 5. The hydraulic power source includes an oil storage tank 31, an oil injection motor 32, an oil injection valve 33, an oil discharge motor 34, an oil discharge valve 35, an oil injection pipe 36, and an oil discharge pipe 37. The chassis 7 has a hydraulic oil inlet 38 and a hydraulic oil outlet 39 that communicate with the hydraulic chamber 15. One end of the oil injection pipe 36 and the oil discharge pipe 37 are respectively connected to the hydraulic oil inlet 38 and the hydraulic oil outlet 39, and the other end of the oil injection pipe 36 and the oil discharge pipe 37 are both connected to the oil storage tank 31. The oil injection valve 33 is installed on the oil injection pipe 36, and the oil injection valve 33 is connected to the oil injection motor 32. The oil discharge valve 35 is installed on the oil discharge pipe 37, and the oil discharge valve 35 is connected to the oil discharge pipe 37.

[0060] like Figure 1 As shown, the top cover 6 is equipped with a vacuum system 40, which is connected to the space between the hydraulic outer body 14 and the shell 5 through a vacuum tube. Multiple through holes 41 are provided through the heating layer body 10.

[0061] Furthermore, such as Figure 4 As shown, the shell 5, top cover 6 and chassis 7 are all outer-inner-outer sandwich structures. The outer layer is made of a material with good mechanical properties, such as steel; the inner layer is made of a material with good thermal insulation properties, such as basalt fiber.

[0062] In this invention, the method of using the metal conductor manufacturing equipment with embedded optical fibers includes:

[0063] Step 1.1: Make two copper strips of equal length, one outer and one inner;

[0064] Step 1.2: Fabricate an optical fiber 2 with a length greater than that of the outer copper strip 1 and the inner copper strip 3, and etch multiple gratings of different wavelengths on the optical fiber 2; for optical fibers that do not require gratings, step 1.2 can be skipped;

[0065] Step 1.3: Open a mounting groove 4 along its length at the middle position of one end face of the outer copper strip 1, and attach the optical fiber 2 into the mounting groove 4. One end of the optical fiber 2 is located inside the outer copper strip 1, and the other end is located outside.

[0066] Step 1.4: Coil the outer copper strip 1 into the first spiral groove and coil the inner copper strip 3 into the second spiral groove 18.

[0067] Step 1.5: Start the vacuum system 40 and heating device 8. When the temperature of the heating layer body 10 is 550℃~600℃, start the hydraulic pressing device 9. The piston rods of multiple hydraulic cylinders 30 push the four hydraulic ring surfaces 16 toward the hydraulic outer body 14 until the inner copper strip 3 is pressed onto the outer copper strip 1. After the piston rods of the hydraulic cylinders 30 push the hydraulic ring surfaces 16 to a pressure of 15MPa and maintain it for 3 hours, the outer copper strip 1 and the inner copper strip 3 are tightly connected to form a copper strip with embedded optical fiber 2.

[0068] Step 1.6: Stop pressurizing and heating, inject air, open the top cover 6, and remove the copper strip with the embedded optical fiber 2.

[0069] The beneficial effects of the present invention are as follows: The metal conductor manufacturing equipment for embedding optical fibers provided by the present invention, by setting a heating device 8 and a hydraulic pressing device 9, can press the optical fiber 2 between the outer copper strip 1 and the inner copper strip 3 in a high-temperature environment. The inner copper strip 3 and the outer copper strip 1 are combined into an integral package with good reliability. Moreover, the process is simple and the cost is low. It can efficiently and reliably embed the optical fiber 2 into the metal conductor, and solve the manufacturing problem of optical fiber intelligent sensing metal materials.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A metal conductor manufacturing apparatus for embedding optical fibers, characterized in that, The embedded optical fiber metal conductor includes an outer copper strip, an optical fiber, and an inner copper strip. A mounting groove is formed along the length of the outer copper strip at the middle position of one end face. An optical fiber is adhered in the mounting groove and is completely located inside the mounting groove. Multiple gratings of different wavelengths are etched on the optical fiber. One end face of the inner copper strip is pressed onto the end face of the outer copper strip with the mounting groove. One end of the optical fiber is located at one end of the outer copper strip and the inner copper strip, and the other end is located at the other end of the outer copper strip and the inner copper strip. The metal conductor manufacturing equipment for embedding optical fibers includes a housing with openings at both ends and a hollow cylindrical structure. The top and bottom openings of the housing are sealed and detachable, and a top cover and a base are provided. A heating device and a hydraulic pressing device are provided inside the housing. The heating device includes a heating layer body with a hollow cylindrical structure disposed inside the housing. The top and bottom of the heating layer body are detachably connected to the top cover and the base, respectively. A molybdenum strip resistor is wound on the outer circumferential surface of the heating layer body, and the molybdenum strip resistor is electrically connected to a heating power supply outside the housing. A first spiral groove is provided on the inner circumferential surface of the heating layer body. The hydraulic pressing device includes a hollow cylindrical structure comprising a hydraulic outer layer body and a hydraulic inner layer body disposed inside the heating layer body. The top and bottom of the hydraulic inner layer body and the hydraulic outer layer body are detachably connected to a top cover and a chassis, respectively. A hydraulic cavity is provided between the hydraulic inner layer body and the hydraulic outer layer body. Four hydraulic annular surfaces are provided between the hydraulic outer layer body and the heating layer body, forming a hydraulic tubular body. A second spiral groove is provided on the outer circumference of the hydraulic tubular body, and the positions of the first spiral groove and the second spiral groove correspond. A hydraulic drive component is provided on the outer circumference of the hydraulic outer layer body for pushing the four hydraulic annular surfaces toward the heating layer body and communicating with the hydraulic cavity. The outer copper strip is spirally installed in the first spiral groove, and the inner copper strip is spirally installed in the second spiral groove.

2. The metal conductor manufacturing equipment with embedded optical fiber according to claim 1, characterized in that, The top cover and the chassis are both provided with a number of housing fastening holes through the circumference. The two end faces of the housing are provided with a number of connecting threaded holes in the circumference. The housing fastening holes and the connecting threaded holes are aligned one-to-one. Each set of aligned housing fastening holes and connecting threaded holes is provided with a bolt fastener. Both the top cover and the chassis have an outer shell sealing ring mounting groove on their inner end faces. Each of the two outer shell sealing ring mounting grooves contains a sealing ring, and the two end faces of the shell are in close contact with the sealing rings in the outer shell sealing ring mounting grooves.

3. The metal conductor manufacturing equipment with embedded optical fiber according to claim 2, characterized in that, The top cover and the chassis are both provided with a plurality of heating layer fastening holes, and the two end faces of the heating layer body are provided with a plurality of heating layer internal thread holes in a circumferential manner. The heating layer fastening holes and the heating layer internal thread holes are aligned one-to-one. Each set of aligned heating layer fastening holes and heating layer internal thread holes is provided with a bolt fastener.

4. The metal conductor manufacturing equipment with embedded optical fiber according to claim 3, characterized in that, Both the top cover and the chassis are provided with a plurality of hydraulic inner layer fastening holes and hydraulic outer layer fastening holes circumferentially. The two end faces of the hydraulic inner layer body and the hydraulic outer layer body are respectively provided with a plurality of hydraulic inner layer internal threaded holes and hydraulic outer layer internal threaded holes circumferentially. The plurality of hydraulic inner layer fastening holes are aligned one-to-one with the hydraulic inner layer internal threaded holes, and the plurality of hydraulic outer layer fastening holes are aligned one-to-one with the hydraulic outer layer internal threaded holes. Each set of aligned hydraulic inner layer fastening holes and hydraulic outer layer fastening holes and hydraulic outer layer internal threaded holes is fitted with a bolt fastener. The inner end faces of the top cover and the chassis are each provided with a hydraulic inner layer sealing ring mounting groove and a hydraulic outer layer sealing ring mounting groove; sealing rings are installed in both the hydraulic inner layer sealing ring mounting groove and the hydraulic outer layer sealing ring mounting groove, and the two ends of the hydraulic inner layer body and the hydraulic outer layer body respectively abut against the sealing rings in the hydraulic inner layer sealing ring mounting groove and the hydraulic outer layer sealing ring mounting groove.

5. The metal conductor manufacturing apparatus for embedding optical fibers according to claim 1, characterized in that, The hydraulic drive unit includes a hydraulic power source and eight hydraulic cylinders communicating with the hydraulic chamber. Each hydraulic annular surface is matched with two vertically spaced hydraulic cylinders. The tail end of each hydraulic cylinder is fixedly connected to the outer circumferential wall of the hydraulic outer layer body, and the piston rod of each hydraulic cylinder is fixedly connected to the inner wall of the hydraulic annular surface. The hydraulic power source is located outside the housing and includes an oil reservoir, an oil injection motor, an oil injection valve, an oil discharge motor, an oil discharge valve, an oil injection pipe, and an oil discharge pipe. The chassis has a hydraulic oil inlet and a hydraulic oil outlet communicating with the hydraulic chamber. One end of the oil injection pipe and the oil discharge pipe are respectively connected to the hydraulic oil inlet and the hydraulic oil outlet, and the other end of the oil injection pipe and the oil discharge pipe are connected to the oil reservoir. The oil injection valve is installed on the oil injection pipe and connected to the oil injection motor. The oil discharge valve is installed on the oil discharge pipe and connected to the oil discharge pipe.

6. The metal conductor manufacturing apparatus for embedding optical fibers according to claim 1, characterized in that, The top cover is equipped with a vacuum system, which is connected to the space between the hydraulic outer body and the shell through a vacuum tube. The heating layer body has through holes.

7. The metal conductor manufacturing apparatus for embedding optical fibers according to any one of claims 1 to 6, characterized in that, The shell, top cover, and chassis are all sandwich structures consisting of an outer layer, an inner layer, and an outer layer. The outer layer is made of a material with good mechanical properties, and the inner layer is made of a material with good thermal insulation properties.

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