High-temperature and high-pressure metal conductor and optical fiber fusion equipment

Abstract

The invention relates to a high-temperature and high-pressure metal conductor and optical fiber fusion device, and belongs to the technical field of intelligent conductor manufacturing. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment comprises a top cover and a chassis, wherein a hydraulic outer layer main body, a hydraulic inner layer main body and a heating layer main body are arranged between the top cover and the chassis; a molybdenum belt resistor is arranged on the heating layer main body, a hydraulic device is arranged between the hydraulic outer layer main body and the hydraulic inner layer main body, and a vacuumizing system is arranged outside the shell top cover; when the temperature of the heating layer main body is a preset temperature, an optical fiber is embedded between the inner side copper bar and the outer side copper bar, the hydraulic device presses the inner side copper bar on the outer side copper bar, a piston rod of the hydraulic cylinder pushes the hydraulic ring surface to enable the pressure to be 15MPa, and after the pressure is kept for 3 hours, the outer side copper bar and the inner side copper bar are combined into a whole, so that the fusion of a metal conductor and the optical fiber is realized; packaging is reliable, the process is simple, cost is low, the optical fiber is efficiently and reliably fused into the metal conductor, and a conductor structure with intelligent sensing capacity is formed.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber grating manufacturing, and in particular relates to a high-temperature and high-pressure metal conductor and optical fiber fusion device. Background Art

[0002] Optical fiber, as a new type of passive sensor, can be used to measure physical quantities such as temperature, pressure, and strain. Due to its many advantages, including simple structure, compact size, light weight, high sensitivity, immunity to electromagnetic interference, and immunity to light intensity fluctuations, embedding fiber Bragg gratings (FBGs) as sensors within metal conductors is a practical method for sensing the state of metal conductors.

[0003] The traditional fusion process of metal conductors and optical fibers has the following problems: 1. Poor packaging reliability: When using adhesive or surface mounting methods, optical fibers are easily affected by the environment (such as high temperature and corrosion), leading to failure; 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; 3. Lack of detection function: It is impossible to monitor the internal temperature, stress and other parameters of the conductor in real time, making it difficult to meet the needs of superconducting quench detection, structural health monitoring, etc.

[0004] Patent CN104152901B discloses a method for embedding fiber Bragg gratings (FBGs) into a metal matrix through a combination of chemical plating and electroplating, but this method is complex and costly. Patent CN117492140A proposes an embedded fiber splicing device, but this is only suitable for cable splicing and cannot be used in continuous production. Therefore, there is an urgent need for an efficient and reliable device for manufacturing metal conductors with embedded optical fibers. Summary of the Invention

[0005] Based on the problems existing in the above background technology, the present invention proposes a high-temperature and high-pressure metal conductor and optical fiber fusion device, which solves the problems of poor packaging reliability, complex process and high cost in the existing optical fiber fusion technology.

[0006] The embodiment of the present invention is achieved as follows: An embodiment of the present invention provides a high-temperature, high-pressure metal conductor and optical fiber fusion device. The metal conductor and the optical fiber are fused to form a metal conductor embedded with an optical fiber. The metal conductor embedded with an optical fiber includes an outer copper bar, an optical fiber, and an inner copper bar. A mounting groove is defined along its length at a center position of one end surface of the outer copper bar. An optical fiber is adhered to the mounting groove and is completely located within the mounting groove. The optical fiber is engraved with multiple gratings of different wavelengths. One end surface of the inner copper bar is pressed against the end surface of the outer copper bar with the mounting groove. One end of the optical fiber is located between the outer copper bar and one end of the inner copper bar, and the other end is located between the outer copper bar and one end of the inner copper bar. The high-temperature, high-pressure metal conductor and optical fiber fusion device comprises a top cover and a bottom plate vertically spaced apart, wherein a hydraulic outer layer body, a hydraulic inner layer body, and a heating layer body having cylindrical hollow structures with openings at both ends are sealed and detachably disposed between the top cover and the bottom plate; the hydraulic outer layer body, the hydraulic inner layer body, and the heating layer body are coaxially arranged; The hydraulic inner layer body is disposed within the hydraulic outer layer body, and the heating layer body is disposed within the hydraulic inner layer body; a sealed cavity is disposed between the hydraulic outer layer body and the hydraulic inner layer body, and the sealed cavity is communicated with a hydraulic power source located outside the chassis; a molybdenum ribbon resistor is spirally wound on the inner circumferential surface of the heating layer body, and the molybdenum ribbon resistor is electrically connected to the heating power source outside the chassis; a first spiral groove is disposed on the outer circumferential surface of the heating layer body along its height direction; Four hydraulic annular surfaces are provided between the hydraulic inner layer body and the heating layer body, and the four hydraulic annular surfaces enclose a hydraulic tubular body. A second spiral groove is provided on the circumferential outer wall of the hydraulic tubular body, and the positions of the first spiral groove and the second spiral groove correspond to each other. A hydraulic driving member for pushing the four hydraulic annular surfaces toward the heating layer body and communicating with the sealing cavity is provided on the circumferential outer wall of the hydraulic inner layer body; The top cover is provided with a vacuum system, and the vacuum system is communicated with the inner space of the heating layer body through two vacuum connecting holes on the top cover. A vent hole is provided through the heating layer body.

[0007] Furthermore, the top cover and the chassis are both provided with a plurality of hydraulic inner layer fastening holes and hydraulic outer layer fastening holes, and the end surfaces of the hydraulic inner layer body and the hydraulic outer layer body are respectively provided with a plurality of hydraulic inner layer internal thread screw holes and hydraulic outer layer internal thread screw holes in an annular direction, the plurality of hydraulic inner layer fastening holes are aligned one-to-one with the hydraulic inner layer internal thread screw holes, and the hydraulic outer layer fastening holes are aligned one-to-one with the hydraulic outer layer internal thread screw holes; bolt fasteners are provided in each group of aligned hydraulic inner layer fastening holes and hydraulic inner layer internal thread screw holes and each group of hydraulic outer layer fastening holes and the hydraulic outer layer internal thread screw holes; A circle of hydraulic inner sealing ring installation groove and a circle of hydraulic outer sealing ring installation groove are provided on the inner end faces of the top cover and the chassis; sealing rings are installed in the hydraulic inner sealing ring installation groove and the hydraulic outer sealing ring installation groove, and the two ends of the hydraulic inner layer body and the hydraulic outer layer body are in tight contact with the sealing rings in the hydraulic inner layer sealing ring installation groove and the hydraulic outer layer sealing ring installation groove respectively.

[0008] Furthermore, the top cover and the bottom plate are both provided with a plurality of heating layer fastening holes, and the end faces at both ends of the heating layer body are circumferentially provided with a plurality of heating layer internal screw holes, and the heating layer fastening holes are aligned one by one with the heating layer internal screw holes; bolt fasteners are provided in each group of aligned heating layer fastening holes and heating layer internal screw holes; a circle of heating layer mounting grooves are provided on the inner end faces of the top cover and the bottom plate, and the heating layer mounting grooves are installed with sealing rings, and the end faces at both ends of the heating layer body are respectively in tight contact with the sealing rings in the two heating layer mounting grooves.

[0009] Furthermore, the chassis is provided with two wire holes for the positive and negative power lines to pass through, and the two wire holes are located in the middle of the chassis. One end of the positive and negative power lines in the two wire holes is electrically connected to the heating power supply, and the other end of the positive and negative power lines is electrically connected to the two ends of the molybdenum strip resistor.

[0010] Furthermore, the hydraulic drive component includes 8 hydraulic cylinders connected to the sealing cavity, each hydraulic ring surface is matched with two hydraulic cylinders arranged vertically at intervals, the tail end of each hydraulic cylinder is fixedly connected to the circumferential outer wall of the hydraulic inner layer body, and the piston rod of each hydraulic cylinder is fixedly connected to the inner wall of the hydraulic ring surface; the hydraulic power source is arranged outside the chassis and provides hydraulic power for the 8 hydraulic cylinders.

[0011] Furthermore, the hydraulic power source includes an oil storage tank, an oil filling motor, an oil filling valve, an oil drain motor, an oil drain valve, an oil filling pipe and an oil drain pipe arranged outside the chassis; a hydraulic oil inlet hole and a hydraulic oil outlet hole connected to the sealed cavity are provided on the chassis; one end of the oil filling pipe and the oil drain pipe are respectively connected to the hydraulic oil inlet hole and the hydraulic oil outlet hole, and the other end of the oil filling pipe and the oil drain pipe are both connected to the oil storage tank; the oil filling valve is provided on the oil filling pipe, and the oil filling valve is connected to the oil filling motor; the oil drain valve is provided on the oil drain pipe, and the oil drain valve is connected to the oil drain pipe.

[0012] Furthermore, the hydraulic outer layer body, top cover and chassis are all outer layer-inner layer-outer layer sandwich structures, 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.

[0013] The method of using the high temperature and high pressure metal conductor and optical fiber fusion equipment includes: Step 1.1: Make two outer and inner copper bars of equal length; Step 1.2: Fabricate an optical fiber longer than the outer and inner copper strips and engrave multiple gratings of different wavelengths on the optical fiber. For optical fibers that do not require gratings, skip step 1.2. Step 1.3: Create a mounting groove along the length of the outer copper strip in the middle of one end. Attach the optical fiber into the groove, with one end inside the outer copper strip and the other end outside. Step 1.4: Install the outer copper bar in a spiral shape in the first spiral groove, and install the inner copper bar in a spiral shape in the second spiral groove; Step 1.5: Start the vacuum system and heating device. When the temperature of the main heating layer is between 550°C and 600°C, start multiple hydraulic cylinders. The piston rods of the multiple hydraulic cylinders push the four hydraulic rings toward the main heating layer until the inner copper bar is pressed against the outer copper bar. After the piston rods of the hydraulic cylinders push the hydraulic rings to a pressure of 15 MPa and maintain it for 3 hours, the outer copper bar and the inner copper bar are tightly connected, achieving the fusion of the metal conductor and the optical fiber. Step 1.6: Stop pressurizing and heating, inject air, open the top cover, and remove the copper bar embedded with the optical fiber.

[0014] The beneficial effects of the present invention are as follows: a high-temperature and high-pressure metal conductor and optical fiber fusion device provided by the present invention heats the optical fiber, outer copper bar and inner copper bar to a preset high temperature by setting a molybdenum strip resistor, and multiple hydraulic cylinders embed the optical fiber between the outer copper bar and the inner copper bar, so that the inner copper bar and the outer copper bar form an integral structure, with good packaging reliability, simple process and low cost, and can efficiently and reliably fuse the optical fiber into the metal conductor, solving the manufacturing problem of optical fiber intelligent sensing metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. The above and other objects, features and advantages of the present invention will become more apparent through the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings. The drawings are not intentionally scaled to their actual sizes, and the focus is on illustrating the main purpose of the present invention.

[0016] Figure 1 This is a schematic diagram of the internal structure of a high-temperature and high-pressure metal conductor and optical fiber fusion device according to the present invention.

[0017] Figure 2 This is a schematic diagram of the horizontal cross-sectional structure of the hydraulic ring surface installed on the hydraulic inner layer body.

[0018] Figure 3 A top view of the chassis.

[0019] Figure 4 This is a bottom view of the top cover.

[0020] Figure 5 Schematic diagram of the outer-inner-outer sandwich structure of the top cover and the bottom plate.

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the hydraulic outer layer body.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the hydraulic inner layer body.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the heating layer body.

[0024] Figure 9 This is a front view structural schematic diagram of a hydraulic cylinder arranged on the circumferential inner wall of a hydraulic inner layer body.

[0025] Figure 10 Schematic diagram of the structure of a single hydraulic cylinder.

[0026] Figure 11 This is a schematic diagram of the structure of the hydraulic tubular body after it is unfolded.

[0027] Figure 12 This is a schematic top view of the structure in which the hydraulic cylinder is arranged on the circumferential inner wall of the hydraulic inner layer body.

[0028] Figure 13 Schematic diagram of the structure of a copper bar embedded with optical fiber.

[0029] Figure 14 This is a structural diagram of the optical fiber being arranged inside the outer copper bar.

[0030] Among them, 1. Outer copper bar; 2. Optical fiber; 3. Inner copper bar; 4. Mounting slot; 5. Top cover; 6. Chassis; 7. Hydraulic outer layer body; 8. Hydraulic inner layer body; 9. Heating layer body; 10. Sealing chamber; 11. Hydraulic power source; 12. Molybdenum strip resistor; 13. Heating power source; 14. Hydraulic ring surface; 15. Hydraulic tubular body; 16. Vacuum system; 17. Vent hole; 18. Hydraulic inner layer fastening hole; 19. Hydraulic outer layer fastening hole; 20. Hydraulic inner layer inner thread screw hole; 21. Hydraulic outer layer inner thread screw hole; 22. Hydraulic inner layer sealing ring mounting groove; 23. Hydraulic outer layer sealing Ring mounting groove; 24, heating layer fastening hole; 25, heating layer inner screw hole; 26, wire hole; 27, hydraulic cylinder; 28, cylinder body; 29, cylinder body inner side; 30, cylinder body outer side; 31, piston; 32, piston sealing assembly; 33, end cover; 34, piston rod; 35, oil storage tank; 36, oil filling motor; 37, oil filling valve; 38, oil drain motor; 39, oil drain valve; 40, oil filling pipe; 41, oil drain pipe; 42, hydraulic oil inlet hole; 43, hydraulic oil outlet hole; 44, outer layer; 45, inner layer; 46, heating layer mounting groove; 47, vacuum connecting hole; 48, second spiral groove. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0035] The present invention improves a high temperature and high pressure metal conductor and optical fiber fusion device, the metal conductor and optical fiber 2 are fused to form a metal conductor embedded in the optical fiber 2, such as Figure 13 and Figure 14As shown, the metal conductor embedded with the optical fiber 2 includes an outer copper bar 2, an optical fiber 2 and an inner copper bar 3. A mounting groove is provided at the middle position of one end face of the outer copper bar 2 along its length direction. An optical fiber 2 is adhered in the mounting groove. The optical fiber 2 is completely located inside the mounting groove. A plurality of gratings of different wavelengths are engraved on the optical fiber 2. One end face of the inner copper bar 3 is pressed onto the end face of the outer copper bar 2 with the mounting groove; one end of the optical fiber 2 is located at one end of the outer copper bar 2 and the inner copper bar 3, and the other end is located at the other end of the outer copper bar 2 and the inner copper bar 3.

[0036] like Figure 1 and Figure 2 As shown, the high-temperature and high-pressure metal conductor and optical fiber fusion equipment includes a top cover 5 and a bottom plate 6 arranged vertically at intervals, and a hydraulic outer layer body 7, a hydraulic inner layer body 8 and a heating layer body 9 with openings at both ends and a cylindrical hollow structure are sealed and detachably arranged between the top cover 5 and the bottom plate 6; the hydraulic outer layer body 7, the hydraulic inner layer body 8 and the heating layer body 9 are coaxially arranged.

[0037] The hydraulic inner layer body 8 is disposed within the hydraulic outer layer body 7, and the heating layer body 9 is disposed within the hydraulic inner layer body 8. A sealed chamber 10 is provided between the hydraulic outer and inner layers 7 and 8, communicating with a hydraulic power source 11 located outside the chassis 6. A molybdenum ribbon resistor 12 is spirally wound around the inner circumference of the heating layer body 9, electrically connected to a heating power source 13 outside the chassis 6. A first spiral groove is provided along the outer circumference of the heating layer body 9 along its height. Specifically, the molybdenum ribbon resistor 12 is used for heating, and an alumina ceramic tube is used on the outer surface of the molybdenum ribbon resistor 12 to insulate it from the heating layer body 9.

[0038] Four hydraulic ring surfaces 14 are provided between the hydraulic inner layer body 8 and the heating layer body 9. The four hydraulic ring surfaces 14 enclose a hydraulic tubular body 15. Figure 11 As shown, a second spiral groove 48 is provided on the circumferential outer wall of the hydraulic tubular body 15, and the positions of the first spiral groove and the second spiral groove 48 correspond to each other; a hydraulic driving component for pushing the four hydraulic annular surfaces 14 toward the heating layer body 9 and communicating with the sealing cavity 10 is provided on the circumferential outer wall of the hydraulic inner layer body 8.

[0039] The top cover 5 is provided with a vacuum system 16 , which is connected to the inner space of the heating layer body 9 through two vacuum connecting holes 47 on the top cover 5 . The heating layer body 9 is penetrated by a vent hole 17 .

[0040] Furthermore, if Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, the top cover 5 and the chassis 6 are both circumferentially provided with 16 hydraulic inner fastening holes 18 and 16 hydraulic outer fastening holes 19. The end surfaces of the hydraulic inner body 8 and the hydraulic outer body 7 are circumferentially provided with 16 hydraulic inner thread screw holes 20 and 16 hydraulic outer thread screw holes 21, respectively. The plurality of hydraulic inner fastening holes 18 and hydraulic inner thread screw holes 20 are aligned one-to-one, and the plurality of hydraulic outer fastening holes 19 and hydraulic outer thread screw holes 21 are aligned one-to-one. Bolt fasteners are provided in each aligned group of hydraulic inner fastening holes 18 and hydraulic inner thread screw holes 20, and each group of hydraulic outer fastening holes 19 and hydraulic outer thread screw holes 21. The bolt fasteners integrate the hydraulic inner body 8 and the hydraulic outer body 7 with the top cover 5 and the chassis 6.

[0041] The inner end surfaces of the top cover 5 and the bottom pan 6 are each provided with a hydraulic inner sealing ring mounting groove 22 and a hydraulic outer sealing ring mounting groove 23. Sealing rings are installed in each of these grooves, and the ends of the hydraulic inner and outer bodies 8 and 7 are in close contact with the sealing rings in these grooves, respectively. The provision of the sealing rings ensures a seal between the hydraulic inner and outer bodies 8 and 7 and the top cover 5 and bottom pan 6.

[0042] Furthermore, if Figure 3 and Figure 8 As shown, 16 heating layer fastening holes 24 are provided on both the top cover 5 and the bottom plate 6 in a ring-shaped manner, and 16 heating layer internal thread screw holes 25 are provided circumferentially on the end faces of both ends of the heating layer body 9. The heating layer fastening holes 24 and the heating layer internal thread screw holes 25 are aligned one by one; bolt fasteners are provided in each group of aligned heating layer fastening holes 24 and heating layer internal thread screw holes 25. The bolt fasteners combine the heating layer body 9 with the top cover 5 and the bottom plate 6 into a whole. A circle of heating layer mounting grooves 46 are provided on the inner end faces of the top cover 5 and the bottom plate 6, and the heating layer mounting grooves 46 are installed with sealing rings. The end faces of the heating layer body 9 are respectively in tight contact with the sealing rings in the two heating layer mounting grooves 46; the provision of the sealing rings ensures that the interface between the heating layer body 9 and the top cover 5 and the bottom plate 6 remains sealed.

[0043] Such as 1 and Figure 3 As shown, the chassis 6 is provided with two wire holes 26 for the positive and negative power lines to pass through. The two wire holes 26 are located in the middle of the chassis 6. One end of the positive and negative power lines in the two wire holes 26 is electrically connected to the heating power supply 13, and the other end of the positive and negative power lines is electrically connected to the two ends of the molybdenum strip resistor 12.

[0044] like Figure 9 and Figure 12 As shown, the hydraulic drive unit includes eight hydraulic cylinders 27 connected to the sealed cavity 10. Each hydraulic ring surface 14 is matched with two hydraulic cylinders 27 vertically spaced apart. The tail end of each hydraulic cylinder 27 is fixedly connected to the circumferential outer wall of the hydraulic inner layer body 8, and the piston rod of each hydraulic cylinder 27 is fixedly connected to the inner wall of the hydraulic ring surface 14. The hydraulic power source 11 is arranged outside the chassis 6 and provides hydraulic power to the eight hydraulic cylinders 27. Specifically, as an embodiment of a single hydraulic cylinder 27, as shown in FIG. Figure 10 As shown, the hydraulic cylinder 27 is composed of a cylinder body 28, a piston 31, a piston sealing assembly 32, a piston rod 34, and an end cover 33. The cylinder body 28 is tubular, and the inner side 29 of the cylinder body is welded to the hydraulic inner layer body 8 as a whole and keeps it sealed. The hydraulic oil can enter the cylinder body 28 through the inner side of the hydraulic inner layer body 8 without leakage; the outer side 30 of the cylinder body has an external thread; the external thread matches the internal thread of the end cover 33; the end cover 33 is in the shape of a cover, and one side of the end cover 33 has an internal thread, which matches the external thread of the outer side 30 of the cylinder body; when installed, it is tightly attached to the cylinder body. 28; the other side is a cover with a hole; the hole diameter is slightly larger than the outer diameter of the piston rod 34 and slightly smaller than the outer diameter of the piston 31; the piston rod 34 is cylindrical; the outer diameter is slightly smaller than the outer diameter of the hole in the middle of the end cover top, one side passes through the hole in the middle of the end cover top, and the other side is welded to the piston 31; the piston 31 and the piston rod 34 have the same axis, are cylindrical, and the outer diameter is slightly smaller than the inner diameter of the cylinder body and slightly larger than the outer diameter of the piston rod 34; there are multiple sealing assembly mounting grooves on the side of the piston 31; the piston sealing assembly 32 is connected to the mounting groove on the side of the piston to maintain a seal between the piston 31 and the cylinder body 28.

[0045] like Figure 1 As shown, the hydraulic power source 11 includes an oil storage tank 35, an oil filling motor 36, an oil filling valve 37, an oil drain motor 38, an oil drain valve 39, an oil filling pipe 40 and an oil drain pipe 41, which are arranged outside the chassis 6; a hydraulic oil inlet hole 42 and a hydraulic oil outlet hole 43 connected to the sealed cavity 10 are provided on the chassis 6; one end of the oil filling pipe 40 and the oil drain pipe 41 are respectively connected to the hydraulic oil inlet hole 42 and the hydraulic oil outlet hole 43, and the other end of the oil filling pipe 40 and the oil drain pipe 41 are both connected to the oil storage tank 35; the oil filling valve 37 is provided on the oil filling pipe 40, and the oil filling valve 37 is connected to the oil filling motor 36; the oil drain valve 39 is provided on the oil drain pipe 41, and the oil drain valve 39 is connected to the oil drain pipe 41.

[0046] Furthermore, the hydraulic outer layer body 7, the top cover 5 and the chassis 6 are all outer layer-inner layer-outer layer sandwich structures, the material of the outer layer 44 is a material with good mechanical properties, and the material of the inner layer 45 is a material with good thermal insulation properties.

[0047] Furthermore, if Figure 5As shown, the top cover 5 and the chassis 6 are both outer layer-inner layer-outer layer 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.

[0048] The method of using the high temperature and high pressure metal conductor and optical fiber fusion equipment includes: Step 1.1, make two outer copper bars 2 and inner copper bars 3 of equal length; Step 1.2, making an optical fiber 2 whose length is greater than that of the outer copper bar 2 and the inner copper bar 3 and engraving a plurality of gratings with different wavelengths on the optical fiber 2; Step 1.3: Create a mounting groove along the length of the outer copper strip 2 at the middle of one end thereof, and attach the optical fiber 2 into the mounting groove, with one end of the optical fiber 2 located inside the outer copper strip 2 and the other end outside. Step 1.4: spirally install the outer copper bar 2 in the first spiral groove, and spirally install the inner copper bar 3 in the second spiral groove 48; Step 1.5: Start the vacuum system 16 and the heating device. When the temperature of the heating layer body 9 is between 550°C and 600°C, start the multiple hydraulic cylinders 27. The piston rods of the multiple hydraulic cylinders 27 push the four hydraulic ring surfaces 14 toward the heating layer body 9 until the inner copper bar 3 is pressed against the outer copper bar 2. The piston rods of the hydraulic cylinders 27 push the hydraulic ring surfaces 14 to a pressure of 15 MPa and maintain it for 3 hours. After that, the outer copper bar 2 is tightly connected to the inner copper bar 3, achieving fusion of the metal conductor and the optical fiber 2. Step 1.6: Stop pressurizing and heating, inject air, open the top cover 5, and take out the copper bar embedded with the optical fiber 2.

[0049] The beneficial effects of the present invention are as follows: a high-temperature and high-pressure metal conductor and optical fiber fusion device provided by the present invention heats the optical fiber 2, the outer copper bar 2 and the inner copper bar 3 to a preset high temperature by setting a molybdenum ribbon resistor 12, and multiple hydraulic cylinders 27 embed the optical fiber 2 between the outer copper bar 2 and the inner copper bar 3, so that the inner copper bar 3 and the outer copper bar 2 form an integral structure, with good packaging reliability, simple process and low cost, and can efficiently and reliably fuse the optical fiber 2 into the metal conductor, solving the manufacturing problem of optical fiber intelligent sensing metal materials.

[0050] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-temperature and high-pressure metal conductor and optical fiber fusion device, characterized in that: The metal conductor and the optical fiber are fused to form a metal conductor embedded with the optical fiber. The metal conductor embedded with the optical fiber includes an outer copper bar, an optical fiber, and an inner copper bar. A mounting groove is provided at a middle position along the length of one end surface of the outer copper bar. The optical fiber is adhered to the mounting groove and is completely located within the mounting groove. The optical fiber is engraved with multiple gratings of different wavelengths. One end surface of the inner copper bar is pressed against the end surface of the outer copper bar with the mounting groove. One end of the optical fiber is located between the outer copper bar and one end of the inner copper bar, and the other end is located between the outer copper bar and one end of the inner copper bar. The high-temperature, high-pressure metal conductor and optical fiber fusion device comprises a top cover and a bottom plate vertically spaced apart, wherein a hydraulic outer layer body, a hydraulic inner layer body, and a heating layer body having cylindrical hollow structures with openings at both ends are sealed and detachably disposed between the top cover and the bottom plate; the hydraulic outer layer body, the hydraulic inner layer body, and the heating layer body are coaxially arranged; The hydraulic inner layer body is disposed within the hydraulic outer layer body, and the heating layer body is disposed within the hydraulic inner layer body; a sealed cavity is disposed between the hydraulic outer layer body and the hydraulic inner layer body, and the sealed cavity is communicated with a hydraulic power source located outside the chassis; a molybdenum ribbon resistor is spirally wound on the inner circumferential surface of the heating layer body, and the molybdenum ribbon resistor is electrically connected to the heating power source outside the chassis; a first spiral groove is disposed on the outer circumferential surface of the heating layer body along its height direction; Four hydraulic annular surfaces are provided between the hydraulic inner layer body and the heating layer body, and the four hydraulic annular surfaces enclose a hydraulic tubular body. A second spiral groove is provided on the circumferential outer wall of the hydraulic tubular body, and the positions of the first spiral groove and the second spiral groove correspond to each other. A hydraulic driving member for pushing the four hydraulic annular surfaces toward the heating layer body and communicating with the sealing cavity is provided on the circumferential outer wall of the hydraulic inner layer body; The top cover is provided with a vacuum system, and the vacuum system is communicated with the inner space of the heating layer body through two vacuum connecting holes on the top cover. A vent hole is provided through the heating layer body.

2. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment according to claim 1, characterized in that: A plurality of hydraulic inner layer fastening holes and hydraulic outer layer fastening holes are provided on the top cover and the chassis in a ring-shaped manner, and a plurality of hydraulic inner layer internal thread screw holes and hydraulic outer layer internal thread screw holes are provided on both end surfaces of the hydraulic inner layer body and the hydraulic outer layer body in a ring-shaped manner respectively. The plurality of hydraulic inner layer fastening holes are aligned one-to-one with the hydraulic inner layer internal thread screw holes, and the hydraulic outer layer fastening holes are aligned one-to-one with the hydraulic outer layer internal thread screw holes; bolt fasteners are provided in each group of aligned hydraulic inner layer fastening holes and hydraulic inner layer internal thread screw holes and each group of aligned hydraulic outer layer fastening holes and the hydraulic outer layer internal thread screw holes; A circle of hydraulic inner sealing ring installation groove and a circle of hydraulic outer sealing ring installation groove are provided on the inner end faces of the top cover and the chassis; sealing rings are installed in the hydraulic inner sealing ring installation groove and the hydraulic outer sealing ring installation groove, and the two ends of the hydraulic inner layer body and the hydraulic outer layer body are in tight contact with the sealing rings in the hydraulic inner layer sealing ring installation groove and the hydraulic outer layer sealing ring installation groove respectively.

3. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment according to claim 2, characterized in that: The top cover and the bottom plate are both provided with a plurality of heating layer fastening holes, and the end faces of both ends of the heating layer body are circumferentially provided with a plurality of heating layer internal screw holes, and the heating layer fastening holes are aligned one by one with the heating layer internal screw holes; bolt fasteners are provided in each group of aligned heating layer fastening holes and heating layer internal screw holes; a circle of heating layer mounting grooves are provided on the inner end faces of the top cover and the bottom plate, and the heating layer mounting grooves are installed with sealing rings, and the end faces of both ends of the heating layer body are respectively in tight contact with the sealing rings in the two heating layer mounting grooves.

4. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment according to claim 3, characterized in that: The chassis is provided with two wire holes for the positive and negative power lines to pass through. The two wire holes are located in the middle of the chassis. One end of the positive and negative power lines in the two wire holes is electrically connected to the heating power supply, and the other end of the positive and negative power lines is electrically connected to the two ends of the molybdenum strip resistor.

5. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment according to claim 1, characterized in that: The hydraulic drive component includes 8 hydraulic cylinders connected to the sealing cavity. Each hydraulic ring surface is matched with two hydraulic cylinders arranged vertically at intervals. The tail end of each hydraulic cylinder is fixedly connected to the circumferential outer wall of the hydraulic inner layer body, and the piston rod of each hydraulic cylinder is fixedly connected to the inner wall of the hydraulic ring surface. The hydraulic power source is arranged outside the chassis and provides hydraulic power for the 8 hydraulic cylinders.

6. The high-temperature and high-pressure metal conductor and optical fiber fusion equipment according to claim 5, characterized in that: The hydraulic power source includes an oil storage tank, an oil filling motor, an oil filling valve, an oil drain motor, an oil drain valve, an oil filling pipe and an oil drain pipe arranged outside the chassis; a hydraulic oil inlet hole and a hydraulic oil outlet hole connected to the sealed cavity are provided on the chassis; one end of the oil filling pipe and the oil drain pipe are connected to the hydraulic oil inlet hole and the hydraulic oil outlet hole respectively, and the other end of the oil filling pipe and the oil drain pipe are both connected to the oil storage tank; the oil filling valve is provided on the oil filling pipe, and the oil filling valve is connected to the oil filling motor; the oil drain pipe is provided with the oil drain valve, and the oil drain valve is connected to the oil drain pipe.

7. The high-temperature and high-pressure metal conductor and optical fiber fusion device according to any one of claims 1 to 6, characterized in that: The hydraulic outer layer body, top cover and chassis all have an outer layer-inner layer-outer layer sandwich structure. 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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