An online cable recycling device for internal cables of nuclear fusion armored superconducting coils

Abstract

The present invention discloses an online recovery device for the internal cable of a nuclear fusion armored superconducting coil, wherein the conductor to be cut enters a sprocket drive module from an input guide roller, is adjusted through positive and negative screw rods to clamp the conductor to be cut, and drives the conductor to be cut to move forward to a cutting surface. Before cutting, the upper and lower surfaces of the conductor to be cut are simultaneously contacted with two saw blades through the joint adjustment of a pressure wheel module and a cutting module, and the cutting module is started. After the armor and inner core formed by cutting form a certain length, the two are passed through a bending device and then wound into a circle, thereby realizing the online continuous cutting and winding function of the armored coil / cable. The present invention realizes the online lossless recovery of armored superconducting cables, has the advantages of simple structure, easy operation, high degree of automation, etc., and has broad application prospects in the processes of nuclear fusion superconducting conductor manufacturing, superconducting coil winding, etc.

Description

Technical Field

[0001] The invention belongs to the field of research and development of superconducting coils for nuclear fusion, and in particular relates to an online recovery device for internal cables of a nuclear fusion armored superconducting coil. Background Art

[0002] Nuclear fusion energy is an ideal clean energy for mankind. It has low pollution to the environment and the fusion products are non-radioactive. At the same time, since the conditions required for fusion reactions are relatively high, once an accident occurs, the plasma confinement of the reaction will be broken and the fusion reaction will be terminated, which is highly safe. The superconducting magnet system is the core component of the magnetic confinement tokamak device. The superconducting magnet system for fusion usually adopts the CICC (Cable in Conduit Conductor) structure. The NbTi or Nb3Sn superconducting strands after multi-stage cable twisting are inserted into the stainless steel armor. The conductor is manufactured through a multi-stage cable shrinking process. The superconducting strands are used to bear the strong current during the magnet excitation process. The stainless steel armor is used as a superfluid helium cooling channel to achieve a low temperature environment for the superconducting strands, and on the other hand, it is used to bear the strong electromagnetic force during the magnet excitation process.

[0003] During the coil manufacturing process, for NbTi superconducting coils, the coiled superconducting conductor is wound and formed through the process of conductor delivery, conductor pre-straightening, online ultrasonic cleaning, online sandblasting and cleaning, tension-free bending, conductor die dropping, etc., followed by joint manufacturing, coil heat treatment, coil inter-turn insulation online winding, coil VPI manufacturing and other processes to complete the manufacturing; for Nb3Sn superconducting coils, the coiled superconducting conductor is wound and formed through the process of conductor delivery, conductor pre-straightening, online ultrasonic cleaning, online sandblasting and cleaning, tension-free bending, coil inter-turn insulation winding, conductor die dropping, etc., followed by joint manufacturing, coil VPI manufacturing and other processes to complete the manufacturing. In the actual scientific research process, in order to verify the precision winding and forming equipment and related processes of the coil, it is usually necessary to complete the verification of the model coil winding. At present, after the relevant tests are completed on the wound armored superconducting coils at home and abroad, they are usually scrapped, resulting in the waste of internal superconducting cables. In order to make more effective use of the internal superconducting cable, it is urgent to design a set of online stripping equipment for nuclear fusion armored superconducting conductors as soon as possible. On the one hand, it can complete the reuse of the superconducting cable inside the early experimental coil. At the same time, in the subsequent coil winding process, if there are process and technical problems such as armor leakage and coil winding profile out of tolerance, the internal superconducting cable can be reused by stripping off the external armor to reduce losses. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an online recovery device for the internal cable of a nuclear fusion armored superconducting coil, which can pull apart the superconducting cable that has been collected and the superconducting coil that has been wound, and realize online cutting of the external armor, online cooling, and online recovery of the armor and superconducting cable.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] The conductor to be cut enters the sprocket drive module from the input guide roller, and is clamped by adjusting the positive and negative screw rods, and is driven to move toward the cutting surface. Before cutting, the upper and lower surfaces of the conductor to be cut are contacted with two saw blades at the same time through the joint adjustment of the pressure wheel module and the cutting module. The cutting module is started, and after the armor and inner core formed by cutting have formed a certain length, the two are passed through the bending device and then wound into a circle.

[0007] The beneficial effects of the present invention are:

[0008] The present invention solves the problem of effective recycling of superconducting cables inside armored superconducting coils. Through the online cable stripping device, the online recycling of the coiled conductors after collection can be completed to avoid the risk of conductor scrapping due to armor defects; and the continuous unwinding of the armored superconducting coils that have been wound and the online lossless cutting of superconducting cables can be realized. The device can adapt to the online recycling of armored superconducting cables with different cross-sections and different materials, and has the advantages of simple structure, high degree of automation, low equipment cost, simple operation, and low operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic structural diagram of an online recovery device for internal cables of a nuclear fusion armored superconducting coil according to the present invention;

[0010] Figure 2 Schematic diagram of the sprocket drive module structure;

[0011] Figure 3 It is a schematic diagram of the structure of the pressure wheel module;

[0012] Figure 4 It is a schematic diagram of the cutting module structure;

[0013] Figure 5 It is a top view of the cutting submodule;

[0014] Figure 6 It is a cross-sectional view of the cutting surface of the conductor to be cut along the "AA" direction;

[0015] Figure 7 The schematic diagram is a principle diagram of the process from cutting to winding the conductor into a circle.

[0016] 1-frame; 2-sprocket drive module; 3-cutting module; 4-output guide roller; 5-pressing wheel module; 6-high-pressure air pipe; 7-input guide roller; 8-conductor to be cut; 21-sprocket base plate; 22-guide rail; 23-driven sprocket; 24-positive and negative screw rod; 25-first reduction motor; 26-driving sprocket; 27-sprocket; 28-chain; 29-pressing block; 210-mounting plate; 31-cutting stand; 32-fixing plate; 33-cutting shaft; 34-saw blade; 35-pressing plate; 36-locking nut ;37-second hand-cranked screw;38-second reduction motor;39-grating digital display scale;310-L-shaped connecting plate;311-cutting submodule;312-linear guide;313-buffer pad;314-base;315-coupling;51-first hand-cranked screw;52-connecting piece;53-pressure wheel;54-rotary encoder;55-guide rod;56-bracket;712-bending device;713-cutting surface;81-armor;811-armor winding;82-inner core;821-inner core winding. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments.

[0018] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0019] like Figure 1 As shown, an online recovery device for internal cables of a nuclear fusion armored superconducting coil of the present invention includes a frame 1 and a sprocket drive module 2, a cutting module 3, an output guide roller 4, a pressure wheel module 5, a high-pressure air pipe 6, and an input guide roller 7 located inside the frame 1.

[0020] The input guide roller 7, the pressure wheel module 5, and the output guide roller 4 are sequentially connected to form a transportation space for the conductor 8 to be cut;

[0021] The sprocket drive module 2 is installed on both sides of the input guide roller 7, and serves as a driving source to drive the conductor 8 to be cut forward. Specifically, the sprocket drive module 2 is fixedly installed on the side of the frame 1 close to the input guide roller 7, and the lower half of the sprocket drive module 2 is located below the frame 1, and the upper half of the sprocket drive module 2 is located on both sides of the input guide roller 7, serving as a driving source for the conductor 8 to be cut forward.

[0022] The cutting module 3 is located at the beginning of the output guide roller 4 and is fixedly connected to the frame 1, and is used to cut the conductor 8 to be cut, and the conductor is output from the output guide roller 4 after cutting.

[0023] The pressing wheel module 5 is located between the end of the input guide roller 7 and the cutting module 3, and is fixedly connected to the frame 1, and is used to adjust the center of the conductor 8 to be cut to coincide with the cutting center of the cutting module 3;

[0024] The high-pressure air pipe 6 is fixedly mounted on the upper and lower sides of the frame 1, and its air outlet is aligned with the cutting point of the saw blade 34, so as to dissipate heat and remove chips for the saw blade 34 during the cutting process.

[0025] like Figure 2 As shown, the sprocket drive module 2 includes a sprocket base plate 21, a guide rail 22, a driven sprocket 23, a forward and reverse threaded screw rod 24, a first reduction motor 25, and a driving sprocket 26, which are used to drive the conductor 8 to be cut forward.

[0026] The sprocket bottom plate 21 is rectangular in shape as a whole, and four edges are provided with "Z"-shaped steps to facilitate the installation of the sprocket drive module 2 on the frame 1. The sprocket bottom plate 21 is provided with a square hole for avoidance at the position where the first reduction motor 25 is placed.

[0027] The guide rails 22 are distributed on the left and right sides of the upper surface of the sprocket base plate 21 to provide linear positioning for the driving sprocket 26 and the driven sprocket 23 .

[0028] The forward and reverse screw rod 24 is located below the driving sprocket 26 and the driven sprocket 23, horizontally between the two guide rails 22, and parallel to the two guide rails 22, with a length greater than the length of the guide rails 22, and is rotationally connected with the front and rear ends in contact with the sprocket base plate 21, and is respectively connected with the end faces in contact with the driving sprocket 26 and the driven sprocket 23 in a front and rear trapezoidal thread connection, and the thread lead of the two threaded connection parts is the same, and the rotation direction is opposite; when the forward and reverse screw rod 24 rotates clockwise or counterclockwise, the driving sprocket 26 and the driven sprocket 23 simultaneously move closer to the middle or separate to both sides.

[0029] The driving sprocket 26 and the driven sprocket 23 have the same structure, are symmetrically distributed on both sides of the sprocket bottom plate 21, are perpendicular to the length direction of the two guide rails 22, and are fixedly connected to the guide rails 22. Taking the driving sprocket 26 as an example, it includes a sprocket 27, a chain 28, and a pressure block 29 from the inside to the outside, and the three are assembled on the mounting plate 210, and the left and right ends of the mounting plate 210 are mounted on the guide rails 22. Under the action of the positive and negative threaded rods 24, the driving sprocket 26 and the driven sprocket 23 can approach the middle and form a space smaller than the width of the conductor 8 to be cut, which is convenient for clamping and driving the conductor 8 to be cut, wherein a sprocket 27 of the driving sprocket 26 is connected to the first reduction motor 25, which serves as a driving source for the sprocket drive module 2 to drive the conductor 8 to be cut.

[0030] The sprocket 27 has a double-layer tooth shape and is matched and connected with the chain 28 .

[0031] The pressing blocks 29 are made of metal and wear-resistant rubber-coated parts, and are evenly distributed and fixed along the periphery of the chain 28. The length of the pressing blocks 29 is greater than the height of the conductor 8 to be cut.

[0032] The mounting plate 210 is located at the bottom of the sprocket 27 , and its width is smaller than that of the driving sprocket 26 , so as to form a smaller space between the driving sprocket 26 and the driven sprocket 23 .

[0033] like Figure 3 As shown, the pressure wheel module 5 includes a first hand-cranked screw rod 51, a connecting piece 52, a pressure wheel 53, a rotary encoder 54, a guide rod 55, and a bracket 56. The pressure wheel module 5 is used as a pre-order module before cutting the conductor 8 to be cut, and is used to adjust the center of the conductor 8 to be cut to coincide with the cutting center of the cutting module 3. At the same time, its pressure wheel 53 presses the conductor 8 to be cut to ensure that the saw blade 34 will not be damaged during the cutting process due to the offset of the conductor 8 to be cut.

[0034] The first hand-cranked screw rod 51, the connecting piece 52, and the two pressure wheels 53 are connected and combined in sequence, with a total of two sets symmetrically distributed at the upper and lower ends of the bracket 56. The first hand-cranked screw rod 51 passes through the bracket 56 and is threadedly connected to the bracket 56, and is fixedly connected to the upper end of the connecting piece 52. The two first hand-cranked screw rods 51 are operated independently.

[0035] Every two of the pressing wheels 53 are placed side by side and are rotatably connected to the connecting member 52 , and the radial edges of the pressing wheels 53 extend beyond the end faces of the connecting member 52 in the opening direction. The pressing wheels 53 are made of wear-resistant rubber.

[0036] The rotary encoder 54 is located outside the upper section of the bracket 56 and is axially fixedly connected to the pressing wheel 53. It rotates synchronously with the pressing wheel 53 to measure the distance traveled by the conductor 8 to be cut.

[0037] The connecting member 52 is in a “C”-shaped structure with its opening downward, and one side of the connecting member 52 close to the bracket 56 protrudes to slide with the guide rod 55 .

[0038] The bracket 56 is an overall "C"-shaped structure, which is used to accommodate the first hand-cranked screw 51, the connecting piece 52, the pressure wheel 53, the rotary encoder 54, and the guide rod 55. It is fixedly connected to the guide rod 55 between the upper and lower ends of the "C"-shaped structure, and the back side of the "C"-shaped structure includes a protruding step for installation on the frame 1.

[0039] like Figure 4 , Figure 5As shown, the cutting module 3 includes 2 sets of cutting sub-modules 311, 2 sets of linear guide rails 312, a cutting stand 31, a grating digital display scale 39, an L-shaped connecting plate 310, a second hand-cranked screw 37, and a plurality of buffer pads 313. The cutting module 3 rotates through the second hand-cranked screw 37 to drive the two cutting sub-modules 311 to approach the middle at the same time, thereby realizing the upper and lower surface cutting of the conductor 8 to be cut.

[0040] The cutting submodule 311 includes a second reduction motor 38, a base 314, a coupling 315, a fixing plate 32, a cutting shaft 33, a saw blade 34, a pressure plate 35 and a locking nut 36 connected in sequence from left to right. The cutting submodule 311 is installed on the linear guide rails 312 on both sides of the cutting stand 31 through the fixing plate 32, and can slide up and down respectively.

[0041] The second reduction motor 38 is composed of a servo motor and a reduction gear, and is fixedly mounted on the base 314 , and its output end is connected to the input end of the cutting shaft 33 through a coupling 315 .

[0042] The base 314 is in a “C” shape, and an opening is fixedly connected to the left end surface of the fixing plate 32 .

[0043] The fixing plate 32 is square in shape and is rotatably matched with the cutting shaft 33 . A trapezoidal threaded hole is provided on one side of the fixing plate 32 close to the linear guide rail 312 , which is threadably matched with the second hand screw 37 .

[0044] The cutting shaft 33 is provided with a large step on one side close to the saw blade 34 . The outer diameter of the large step is the same as that of the pressure plate 35 . Together with the pressure plate 35 and the locking nut 36 , the saw blade 34 is clamped, and it is also convenient to replace the worn or damaged saw blade 34 .

[0045] The cutting stand 31 is arranged longitudinally, and bosses are provided on both sides to facilitate fixed connection with the frame 1 .

[0046] The grating digital display scale 39 is fixedly mounted on the cutting stand 31 , and its digital display portion is fixedly connected to the fixing plate 32 located above via an L-shaped connecting plate 310 , thereby providing a reference for adjusting the distance between the two cutting submodules 311 .

[0047] The second hand-cranked screw 37 is arranged on one side of the cutting stand 31 close to the fixed plate 32, and is connected to the fixed plate 32 of the cutting sub-module 311 by a trapezoidal thread, and both ends are rotatably matched with the cutting stand 31; the thread lead of the two threaded connection parts is the same, and the rotation direction is opposite. When the second hand-cranked screw 37 rotates clockwise or counterclockwise, the two cutting sub-modules 311 move closer to the middle or separate to the sides at the same time.

[0048] like Figure 6As shown, the conductor 8 to be cut is divided into an armor 81 and an inner core 82 after being cut by the saw blade 34 at the cutting surface 713 .

[0049] For the convenience of description, with the help of a virtual plane, the cutting surface 713 is a virtual plane that is perpendicular to the two saw blades 34 and coincides with the upper and lower quadrants of the saw blades 34 .

[0050] like Figure 7 As shown, the bending device 712 is provided with three staggered cylindrical surfaces, and a total of three contact points of the three cylindrical surfaces close to one side of the armor 81 and the inner core 82 can form a circle of a certain size, thereby making the armor winding 811 and the inner core winding 821 bend and wind along the bending direction of the bending device 712; the input guide roller 7 is arranged below the conductor 8 to be cut, and is kept away from air within the cutting diameter range of the saw blade 34, and its width is smaller than the width of the conductor 8 to be cut, and under the drive of the sprocket drive module 2, it assists the conductor 8 to be cut to move toward the cutting surface 713.

[0051] After passing through the cutting surface 713, the conductor 8 to be cut is limited by the input guide roller 7 and the output guide roller 4 below, and then output to the bending device 712 for rounding. The output guide roller 4 is located behind the cutting surface 713, and two are provided to limit the conductor 8 to be cut at the cutting surface 713 to the left and right to avoid damage to the cutter.

[0052] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online recovery device for the internal cable of a nuclear fusion armored superconducting coil, characterized in that: It includes a frame and a sprocket drive module, a cutting module, an output guide roller, a pressure wheel module, a high-pressure air pipe, and an input guide roller located inside the frame; The input guide roller, the pressure wheel module, and the output guide roller are sequentially connected to form a transportation space for the conductor to be cut; The sprocket drive module is installed on both sides of the input guide roller and serves as a driving source to drive the conductor to be cut forward; The cutting module is located at the beginning of the output guide roller and is used to cut the conductor to be cut; The pressing wheel module is located between the input guide roller and the cutting module, and is used to adjust the center of the conductor to be cut to coincide with the cutting center of the cutting module; The output guide roller is used to output the cut conductor to be cut for transportation; The air outlets of the high-pressure air pipe are respectively located on both sides of the saw blade of the cutting module, and are used to provide heat dissipation and chip removal for the cutting process; The sprocket drive module includes a sprocket base plate, a guide rail, a driven sprocket, a positive and negative threaded screw, a first reduction motor, and a driving sprocket; The guide rails are distributed on the left and right sides of the upper surface of the sprocket base plate, the driving sprocket and the driven sprocket are symmetrically distributed on the other two sides of the sprocket base plate perpendicular to the length direction of the two guide rails, and are fixedly connected to the two guide rails respectively, the positive and negative threaded rods are located below the driving sprocket and the driven sprocket, between the two guide rails, parallel to the guide rails and having a length greater than the length of the guide rails, and are rotationally matched with the front and rear end faces in contact with the sprocket base plate, and are connected with the end face trapezoidal threads in contact with the driving sprocket and the driven sprocket, and the thread lead of the two sections of the trapezoidal threaded connection parts is the same, and the rotation direction is opposite; One sprocket of the driving sprocket is connected to the first reduction motor and serves as a driving source for the sprocket driving module to drive the conductor to be cut; The pressure wheel module includes a first hand screw, a connecting piece, a pressure wheel, a rotary encoder, a guide rod, and a bracket; wherein, The bracket is in a "C"-shaped structure as a whole, and is used to accommodate the first hand-cranked screw, the connecting piece, the pressure wheel, the rotary encoder, and the guide rod; the first hand-cranked screw passes through the bracket and is fixedly connected to the upper end of the connecting piece, and every two pressure wheels are placed side by side and accommodated in the connecting piece, and the rotary encoder is axially fixedly connected to the pressure wheel; The first hand-cranked screw rod, the connecting piece, and the two pressure wheels are connected in sequence to form a combination, with a total of two sets symmetrically distributed at the upper and lower ends of the bracket; the guide rod is connected between the two connecting pieces.

2. The online recovery device for the internal cable of the nuclear fusion armored superconducting coil according to claim 1 is characterized in that: The cutting module comprises two cutting submodules and a second hand-cranked screw. The cutting module is rotated by the second hand-cranked screw to drive the two cutting submodules to approach the middle at the same time, so as to achieve cutting of the upper and lower surfaces of the conductor to be cut.

3. The online recovery device for the internal cable of the nuclear fusion armored superconducting coil according to claim 1 is characterized in that: The device also includes a bending device, which is provided with three staggered cylindrical surfaces, and the three cylindrical surfaces are used to wind the armor and the inner core of the conductor to be cut into rolls according to preset radius.

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