A cooling and lubrication device for stranding superconducting cables using a cantilever single twister

Abstract

This utility model relates to the field of superconducting cable stranding technology, and discloses a cooling and lubrication device for stranding superconducting cables using a cantilever single-strand stranding machine. It consists of a storage box, a fixing ring, a connecting screw, a pure cotton rope, a plastic bottle, anhydrous alcohol, and sealing components. The plastic bottle is installed upside down, and the anhydrous alcohol inside is continuously and in small amounts dripped through the pure cotton rope onto the surface of multiple superconducting monofilaments and the stranding core, achieving temporary lubrication. The alcohol evaporates rapidly at room temperature, leaving no residue and causing no corrosion, significantly reducing friction between monofilaments and between monofilaments and the inner hole of the stranding die, avoiding scratches, temperature rises, and microstructural damage, thus ensuring superconducting performance. The fixing ring can be quickly positioned and locked on the die base, and the extension length of the connecting screw and the density of the cotton rope are adjustable to ensure that the lubrication point is accurately located at the entrance of the stranding die. This utility model has a simple structure, low cost, and convenient installation and maintenance, effectively improving the utilization rate of superconducting materials and reducing the manufacturing cost of superconducting cables.

Description

Technical Field

[0001] This utility model relates to the field of superconducting cable stranding technology, and in particular to a cooling and lubrication device for stranding superconducting cables using a cantilever single stranding machine. Background Technology

[0002] Superconducting cables are a high-efficiency energy transmission technology that utilizes the zero-resistance characteristic of superconducting materials at low temperatures to transmit electricity. During the stranding process of superconducting cables on a cantilever single-strand twister, multiple superconducting monofilaments (such as Nb3Sn or NbTi) not only experience friction when in contact with each other, but also rub against the inner hole of the twisting die. This causes scratches and wear on the surface of the stranded superconducting cable, failing to meet the technical specifications for superconducting cables. This results in a significant waste of superconducting materials, reduces their utilization rate, and undoubtedly increases the cost of stranding superconducting cables.

[0003] Designing a reliable cooling and lubrication device for stranding superconducting cables using a cantilever single twister, ensuring that the surface of the stranded superconducting cable is not scratched or worn when multiple superconducting monofilaments pass through the inner hole of the twisting die, and that the cable meets the technical specifications for superconducting cables while further improving the utilization rate of superconducting materials, has always been a difficult problem for those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a cooling and lubrication device for stranding superconducting cables using a cantilever single twister, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A cooling and lubrication device for cantilever single-twisted superconducting cables includes:

[0007] Storage box, fixing ring, connecting screw, two hexagonal nuts, pure cotton rope, bottle cap, plastic bottle, anhydrous alcohol, two sealing gaskets and flat washers;

[0008] The bottle mouth and cap are threaded together, and the bottle contains anhydrous alcohol.

[0009] The bottle cap has a through hole in the center. The external thread of the connecting screw passes through the through hole, and a sealing gasket and a flat washer are placed at both ends of the through hole in sequence. The hexagonal nut located on the outside of the bottle cap is screwed into the external thread to press the sealing gasket and the flat washer onto the end face of the bottle cap to form an end face seal.

[0010] The connecting screw has an axial through hole inside, which is filled with pure cotton rope. One end of the pure cotton rope extends out of the lower end of the through hole and hangs above the wire inlet of the wire-connecting die. The other end is knotted and pressed at the conical surface inside the hexagonal head of the connecting screw.

[0011] The fixing ring has a screw hole. After the external thread of the connecting screw is screwed into the screw hole, it is tightened by the hexagonal nut located on the outside of the fixing ring, so that the connecting screw is fixed to the fixing ring.

[0012] The fixing ring is also provided with two screw holes two that are perpendicular to screw hole one. The internal hexagonal head screw passes through screw hole two and presses against the outer periphery of the mold base, holding the fixing ring tightly against the large end face of the mold base.

[0013] The storage box is placed below the mold frame to receive anhydrous alcohol dripping from the pure cotton rope.

[0014] The retaining ring has a through hole at the lower end of the vertical center line of the screw hole, which allows excess anhydrous alcohol dripping from the pure cotton rope to fall vertically into the storage box.

[0015] The pure cotton rope is a solid rope with a high cotton content, and its diameter is adapted to the size of the through hole. It is filled by twisting single or multiple ropes together.

[0016] The top of the plastic bottle has a through hole for refilling the anhydrous alcohol collected in the storage box into the plastic bottle.

[0017] The distance between the outer end of the connecting screw and the end face of the inlet of the ducting die is adjusted by the screwing depth so that the lower end of the pure cotton rope is close to the inlet of the ducting die.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] This utility model has a simple structure, is easy to manufacture, has low cost, and is convenient to install and use. It has the advantages of being easy to promote and easy to install. When multiple superconducting monofilaments pass through the inner hole of the wire-splitting die, the surface of the stranded superconducting cable will not be scratched or worn, thus meeting the technical specifications of superconducting cables. This further improves the utilization rate of superconducting materials and effectively reduces the manufacturing cost of superconducting cables. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the fixing ring in this utility model.

[0022] Figure 3 This is a schematic diagram of the connecting screw in this utility model.

[0023] Attached Figures and Their Names: 1. Mold Frame; 2. Storage Box; 3. Parallel Wire Mold; 4. Single Superconducting Wire; 5. Fixing Ring; 5.1. Screw Hole 1; 5.2. Through Hole; 5.3. Inner Hole; 5.4. Screw Hole 2; 6. Hexagonal Nut; 7. Connecting Screw; 7.1. External Thread; 7.2. Hexagonal Head; 7.3. Conical Surface; 7.4. Through Hole; 8. Pure Cotton Rope; 9. Bottle Cap; 10. Plastic Bottle; 10.1. Through Hole; 11. Anhydrous Alcohol; 12. Sealing Gasket; 13. Flat Washer; 14. Socket Head Screw; 15. Socket Head Screw; 16. Shaft Elastic Retaining Ring; 17. Mold Base; 18. Multi-Strand Superconducting Wire; 19. Socket Head Screw. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] 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 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 present invention without inventive effort are within the scope of protection of the present invention.

[0026] like Figure 1-3 As shown, this utility model provides a cooling and lubrication device for stranding superconducting cables using a cantilever single twister, which consists of a storage box 2, a fixing ring 5, two hexagonal nuts 6, a connecting screw 7, a pure cotton rope 8, a bottle cap 9, a plastic bottle 10, anhydrous alcohol 11, two sealing gaskets 12, a flat washer 13, and an internal hexagonal head screw 19.

[0027] The anhydrous alcohol 11, used as a temporary lubricant during the stranding process of the superconducting cable, evaporates rapidly at room temperature without leaving any residue. This effectively reduces the friction coefficient between multiple superconducting monofilaments and between each monofilament and the inner hole of the paralleling die 3, preventing localized temperature rise and damage to the material's microstructure while protecting the superconducting performance. Furthermore, the anhydrous alcohol 11 is non-corrosive to copper substrates or superconducting materials, and short-term contact will not trigger a chemical reaction, ensuring the stability of the material. The anhydrous alcohol 11 is contained in a plastic bottle 10, which can be replaced by other suitable-sized plastic bottles such as mineral water bottles. The plastic bottle 10 is threadedly connected to a cap 9. By tightening the cap 9, the anhydrous alcohol contained in the inverted plastic bottle 10 can be released. The plastic bottle 10 is sealed with a through hole 10.1 at the top to facilitate the timely pouring of anhydrous alcohol 11 or anhydrous alcohol 11 collected in the storage box 2 into the plastic bottle; the bottle cap 9 has a through hole at the center position, which is transitionally fitted with the external thread 7.1 of the connecting screw 7; when the external thread 7.1 of the connecting screw 7 passes through the through hole at the center position of the bottle cap 9, sealing gaskets 12 and flat washers 13 that meet the installation requirements need to be installed in sequence at both ends of the through hole at the center position of the bottle cap 9. By tightening the hexagonal nut 6 that is threaded to the external thread 7.1 of the connecting screw 7, the connecting screw 7 can be fastened to the center position of the bottle cap 9, and the sealing gaskets 12 clamped at both ends of the bottle cap 9 provide end face sealing for the connecting screw 7 and the bottle cap 9 assembly.

[0028] The core of the connecting screw 7 is machined with a through hole 7.4, and the inside of the through hole 7.4 is filled with a pure cotton rope 8 of appropriate size; one end of the pure cotton rope 8 filled inside the through hole 7.4 needs to extend a certain length beyond the end of the through hole 7.4 to ensure that the anhydrous alcohol 11 in the plastic bottle 10 drips through the pure cotton rope 8 onto the surface of each stranded single superconducting wire 4 and the stranded core, and the other end is tied into a knot and pressed into the conical surface 7.3 inside the hexagonal head 7.2 of the connecting screw 7.

[0029] The cooling and lubrication device uses a solid, tightly packed pure cotton rope 8. This pure cotton rope 8 has a high cotton content, high cost performance, good quality and is not easy to break. It can be used for a long time. The wire diameter can be made of single or multiple strands twisted together according to the size of the through hole 7.4.

[0030] The external thread 7.1 of the connecting screw 7 is threaded to the screw hole 5.1 of the fixing ring 5. By tightening the hexagonal nut 6 that threads it, the connecting screw 7 can be installed and tightened onto the fixing ring 5. The inner hole 5.3 of the fixing ring 5 is clearance-fitted with the large end face of the mold base 17. Two equally sized screw holes 5.4 are machined on the outer circumference of the fixing ring 5. Both screw holes 5.4 are at 90 degrees to the screw hole 5.1. The screw holes 5.4 of the fixing ring 5 are threaded to the socket head cap screws 19. By tightening each socket head cap screw 19, the fixing ring 5 can be tightened onto the fixing ring 5. The fixing ring 5 is fastened to a suitable position on the large end face of the mold base 17; the outer end of the fixing ring 5 is also machined with a through hole 5.2, which is clearance-fitted with the external thread of the internal hexagonal head screw 14. By tightening the internal hexagonal head screw 14 that passes through the through hole 5.2 and is threaded to the large end face of the mold base 17, the paralleling mold 3 can be fastened in the inner hole of the large end face of the mold base 17; the external thread 7.1 of the connecting screw 7 installed to the fixing ring 5 should be as close as possible to the end face of the wire inlet of the paralleling mold 3, so that the anhydrous alcohol 11 will drip as much as possible through the pure cotton rope 8 onto the surface of each stranded superconducting wire 4 and the stranding core.

[0031] The outer diameter of the small end face of the mold base 17 is clearance-fitted with the inner hole of the mold frame 1. The mold base 17 can be fastened to the end face of the inner hole of the mold frame 1 by tightening the hexagon socket head cap screw 15 that is threaded to the screw hole of the mold base 17. A groove is machined at a suitable position on the small end face of the mold base 17. The axial movement of the mold base 17 can be limited by installing the axial elastic retaining ring 16 to the groove.

[0032] The storage box 2 needs to be placed in a suitable position on the mold frame 1 so that the anhydrous alcohol 11 that flows down can be collected into the storage box 2 in a timely manner.

[0033] As a further improvement of this utility model, if a through hole of suitable size is machined at the lower end of the vertical center line of the screw hole 5.1 of the fixing ring 5, excess anhydrous alcohol 11 can be vertically dripped into the storage box 2, which can further improve the recycling rate of anhydrous alcohol 11 in the cooling and lubrication device.

[0034] The working principle of this utility model is as follows:

[0035] 1) Based on the installation position dimensions of the cantilever single twister mold frame 1, the paralleling mold 3, the mold base 17, and the pressing mold frame 2, as well as the installation position dimensions of the fastening hexagon socket head cap screws 14 and 15, and in conjunction with the above technical solutions, a drawing of a cooling and lubrication device for stranding superconducting cables using a cantilever single twister is designed.

[0036] 2) Based on the design drawings of a cooling and lubrication device for stranding superconducting cables using a cantilever single twister, and considering the quantity of the cooling and lubrication device to be installed, process the storage boxes 2, fixing rings 5, connecting screws 7 that meet the actual needs, and prepare the required hexagonal nuts 6, pure cotton ropes 8, bottle caps 9, plastic bottles 10, anhydrous alcohol 11, sealing gaskets 12, flat washers 13, and internal hexagonal head screws 19.

[0037] 3) Next, according to the drawing requirements of a cooling and lubrication device for stranding superconducting cables using a cantilever single twister, assemble multiple sets of the cooling and lubrication device in sequence according to the drawing requirements.

[0038] 4) With the machine stopped, fasten each of the cooling and lubrication devices to the appropriate position on the large end face of the mold base 17 in sequence. By adjusting the position of the connecting screw 7 and the density of the pure cotton rope 8 filling the through hole 7.4, ensure that the anhydrous alcohol 11 drips as much as possible through the pure cotton rope 8 onto the surface and core of each stranded single superconducting wire 4.

[0039] 5) At this point, the installation of a cooling and lubrication device for stranding superconducting cables on each cantilever single twister is completed. After all the preparations for starting the machine are completed, it can be started normally.

Claims

1. A cooling and lubrication device for cantilever single-twisted superconducting cables, characterized in that, include: Storage box (2), fixing ring (5), connecting screw (7), two hexagonal nuts (6), pure cotton rope (8), bottle cap (9), plastic bottle (10), anhydrous alcohol (11), two sealing gaskets (12) and flat gasket (13); The mouth of the plastic bottle (10) is threadedly connected to the cap (9), and the bottle contains anhydrous alcohol (11); The bottle cap (9) has a through hole in the center. The external thread (7.1) of the connecting screw (7) passes through the through hole, and a sealing gasket (12) and a flat washer (13) are placed in sequence at both ends of the through hole. The hexagonal nut (6) located on the outside of the bottle cap (9) is screwed together with the external thread (7.1) to press the sealing gasket (12) and the flat washer (13) onto the end face of the bottle cap (9) to form an end face seal. The connecting screw (7) has an axial through hole (7.4) inside. The through hole (7.4) is filled with pure cotton rope (8). One end of the pure cotton rope (8) extends out of the lower end of the through hole (7.4) and hangs above the wire inlet of the wire-jointing die (3). The other end is knotted and pressed at the conical surface (7.3) inside the hexagonal head (7.2) of the connecting screw (7). The fixing ring (5) is provided with a screw hole (5.1). The external thread (7.1) of the connecting screw (7) is screwed into the screw hole (5.1) and then tightened by the hexagonal nut (6) located outside the fixing ring (5), so that the connecting screw (7) is fixed to the fixing ring (5). The fixing ring (5) is also provided with two screw holes (5.4) perpendicular to screw hole one (5.1). The internal hexagonal head screw (19) passes through screw hole two (5.4) and presses against the outer periphery of the mold base (17), holding the fixing ring (5) tightly on the large end face of the mold base (17). The storage box (2) is placed below the mold frame (1) to receive anhydrous alcohol (11) dripping from the pure cotton rope (8).

2. The cooling and lubrication device for cantilever single-twisted superconducting cables according to claim 1, characterized in that: The fixing ring (5) has a through hole at the lower end of the vertical center line of the screw hole (5.1), which allows excess anhydrous alcohol (11) dripping from the pure cotton rope (8) to fall vertically into the storage box (2).

3. The cooling and lubrication device for cantilever single-twisted superconducting cables according to claim 1, characterized in that: The pure cotton rope (8) is a solid high cotton content rope with a wire diameter that is compatible with the size of the through hole (7.4) and is filled by twisting single or multiple strands together.

4. A cooling and lubrication device for cantilever single-twisted superconducting cables according to claim 1, characterized in that: The top of the plastic bottle (10) is provided with a through hole (10.1) for refilling the anhydrous alcohol (11) collected in the storage box (2) back into the plastic bottle (10).

5. A cooling and lubrication device for cantilever single-twisted superconducting cables according to claim 1, characterized in that: The distance between the protruding end of the outer thread (7.1) of the connecting screw (7) and the end face of the inlet of the spooling die (3) is adjusted by the screwing depth so that the lower end of the pure cotton rope (8) is close to the inlet of the spooling die (3).

Images