WO2020253084A1

WO2020253084A1 - Ybco superconducting material-based superconductor power cable with simplified connection operation

Info

Publication number: WO2020253084A1
Application number: PCT/CN2019/119144
Authority: WO
Inventors: 袁文; 莫思铭; 蔡渊; 程鹏
Original assignee: 东部超导科技（苏州）有限公司; 苏州新材料研究所有限公司; 江苏永鼎股份有限公司
Priority date: 2019-06-19
Filing date: 2019-11-18
Publication date: 2020-12-24
Also published as: CN110136883B; CN110136883A

Abstract

A YBCO superconducting material-based superconductor power cable with a simplified connection operation. The superconductor power cable is sequentially provided, from an inner side to an outer side in a radial direction, with a core (1), a first cryogenic cold insulation layer (2), a superconductor layer (3), a second cryogenic cold insulation layer (4), a support ring (5), a cryogenic channel (6), an armored copper wire (7), and an outer sheath layer (8). A terminal portion of the superconductor power cable is provided with a truncation protection sleeve (11), a connection cover (13), and a fastening ring (15). A layered structure of the truncation protection sleeve (11) configured from an inner side to an outer side in a radial direction thereof corresponds to that of the superconductor power cable. The layered structure of the truncation protection sleeve (11), apart from the core (1), is connected to the corresponding layered structure of the superconductor power cable via virtual open wires (12). When two superconductor power cables are connected, the connection cover (13) is fixed at a terminal portion of the superconductor power cables, the fastening ring (15) is pulled, and the fastening ring (15) is fastened at an outer surface of a conversion connector (10). The solution achieves operational convenience in the field of connecting superconductor power cables, and provides a truncation protection sleeve (11) that can be directly peeled off, thereby eliminating cutting operations to be performed by external apparatuses, and reducing wear and tear of superconductor cables.

Description

A superconducting cable for easy connection based on YBCO superconducting material

Technical field

The invention relates to the technical field of superconducting cables, in particular to a superconducting cable that is easy to connect based on YBCO superconducting material.

Background technique

The superconducting cable is designed and manufactured by using the characteristics of superconducting to become a zero-resistance superconducting state at its critical temperature, high current density, and capable of carrying large currents. Superconducting cables are new types of cables on the market, and a single superconducting cable has a limited length and requires multiple connections for long-distance laying. When connecting, it needs to be connected through the connection of the current-carrying layer, the connection of the cold insulation layer and the connection of the low-temperature layer pipeline.

In the market for superconducting cables, a new type of superconducting cable made of YBCO superconducting material has appeared. The cable is based on YBCO superconducting material. The superconducting cable is currently in use on the market. When connecting two superconducting cables, it is necessary to cut and cut the outer sheath directly, and an external cutting device must be used to affect the installation and connection time.

Summary of the invention

The purpose of the present invention is to provide a superconducting cable based on YBCO superconducting material, which is suitable for superconducting-superconducting connection, so as to solve the problem that the connection cores in the current market proposed by the above background technology are relatively complicated. The problem of inconvenient cable connection.

In order to achieve the above objectives, the present invention provides the following technical solutions:

An easy-to-connect superconducting cable based on YBCO superconducting material. The superconducting cable is sequentially provided with a core, a first low-temperature cold insulating layer, a superconducting layer, and a second low-temperature cold insulating layer along its radial direction from the inside to the outside , Support ring, low-temperature pipeline, armored copper wire and outer protective layer; wherein the core is formed by twisting a plurality of copper wires, and the first low-temperature cold insulation layer and the second low-temperature cold insulation layer are both cold The insulating material is spirally wound, the superconducting layer is a YBCO superconducting tape multi-layer parallel spiral wound structure, and the supporting rings are arranged at intervals and directly sleeved on the outside of the second low-temperature cold insulating layer The wire core, the first low-temperature cold insulating layer, the superconducting layer, the second low-temperature cold insulating layer and the support ring are integrated inside the low-temperature pipeline, and the armored copper wire is spirally wound on the outside of the low-temperature pipeline , The outer protective layer is an insulated straight pipe structure extruded outside the armored copper wire;

The end of the superconducting cable is provided with a cut-off sheath, the cut-off sheath is a multilayer structure, and the cut-off sheath is arranged in a radial direction from the inside to the outside with a layer structure corresponding to the superconducting cable , The layer structure of the truncated sheath excluding the core and the corresponding layer structure of the superconducting cable are all connected by a virtual disconnection;

The outer side of the outer sheath of the superconducting cable end is also provided with a connecting sleeve and a fastening ring, and the connecting sleeve and the fastening ring are both sleeved on the outer side of the superconducting cable outer sheath and located inside the cut-off sheath , And the connecting sleeve is connected to the fastening ring by an elastic connecting rope. When two superconducting cables are connected, the connecting sleeve is fixed at the end of the superconducting cable and does not move, pulling the fastening ring and Fasten the fastening ring on the outer surface of the adapter.

Further, the cold insulating material is PPLP or polyimide film.

Further, the support ring is a support ring structure with a spacing width of 10 cm, and the material of the support ring is tetrafluoroethylene.

Further, the low-temperature pipeline is a double-layer non-magnetic stainless steel corrugated pipe, and the internal interlayer is vacuum.

Further, the material of the outer protective layer is a cross-linked polyethylene material.

Further, a number of signal receiving slots are evenly arranged on the inner side of the superconducting layer for transmitting voltage signals.

Further, the fastening ring is made of elastic material.

Further, both the connecting sleeve and the fastening ring are provided with positioning holes adapted to the connecting rope.

Compared with the prior art, the beneficial effects of the present invention are:

1) The superconducting cable of the present invention is provided with a truncated sheath at the end, and when the superconducting cable layer structure is sequentially cut, force is applied to the truncated sheath connected to the end of the superconducting cable through the virtual disconnection line to cut off the sheath Rotating and tearing, the cut-off sheath is separated from the end of the superconducting cable, so that the cut-off sheath can be directly peeled off, reducing the use of external equipment and reducing the wear of the superconducting cable.

2) After the superconducting cable is connected, pull the fastening ring on the outside of the adapter. The connecting rope driven by the fastening ring is buckled with the corresponding positioning hole. The fastening ring is sleeved on the outer surface of the adapter to directly protect the adapter. To make the connection safer and more convenient.

Description of the drawings

Figure 1 is a schematic diagram of the main structure of the superconducting cable according to the present invention;

2 is a schematic diagram of the cross-sectional structure of the superconducting cable according to the present invention;

3 is a schematic diagram of the connection structure of adjacent superconducting cables according to the present invention;

4 is a schematic diagram of the unfolded structure of the fastening ring and the connecting sleeve when adjacent superconducting cables are connected according to the present invention;

5 is a schematic diagram of the internal connection structure of the core in the hollow copper tube according to the present invention;

Figure 6 is a schematic diagram of the low-temperature pipeline connection structure of the present invention;

Figure 7 is a schematic diagram of the superconducting layer connection structure of the present invention;

In the picture: 1. Wire core, 2. The first low temperature cold insulation layer, 3. Superconducting layer, 4. The second low temperature cold insulation layer, 5. Support ring, 6. Low temperature pipeline, 7. Armored copper wire, 8. , Outer sheath, 10, conversion joint, 11, cut off sheath, 12, virtual disconnection, 13, connection sleeve, 14, elastic connecting rope, 15, fastening ring, 16, positioning hole, 17, hollow copper pipe, 18. Knife edge, 19. Superconducting connection end.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

An easy-to-connect superconducting cable based on YBCO superconducting material. As shown in Figures 1 and 2, the superconducting cable is sequentially provided with a core 1, a first low-temperature cold insulation layer 2, and a radial direction from the inside to the outside. The superconducting layer 3, the second low-temperature cold insulating layer 4, the support ring 5, the low-temperature pipe 6, the armored copper wire 7 and the outer protective layer 8.

Wherein, the core 1 is formed by twisting a plurality of copper wires with a diameter of 1 mm, and the copper wires are pure electrical copper. The first low-temperature cold insulating layer 2 and the second low-temperature cold insulating layer 4 are made of cold insulating material half-wrapped spirally, and the cold insulating material can be PPLP (polypropylene laminated paper) or polyamide. The imine film, the first low-temperature cold insulating layer 2 is wound on the outer surface of the core 1. The superconducting layer 3 is a multi-layer parallel spiral wound structure of YBCO high temperature superconducting tape, which is wound on the outer surface of the first low temperature cold insulating layer 2. The second low-temperature cold insulating layer 4 is wound on the outer surface of the superconducting layer 3. The support ring is a support ring structure with a spacing width of 10 cm and is made of tetrafluoroethylene material. The support ring is directly sleeved on the outside of the second low temperature cold insulating layer 4. The core 1, the first low-temperature cold insulating layer 2, the superconducting layer 3, the second low-temperature cold insulating layer 4, and the support ring 5 are integrated inside the low-temperature pipeline 6, and the low-temperature pipeline is a corrugated vacuum Dewar tube , And flexible vacuum pipeline structure, its material is double-layer non-magnetic stainless steel corrugated pipe, and its sandwich is vacuum. The armored copper wire is spirally wound on the outside of the cryogenic pipeline 6. The outer sheath is a one-time extruded cable insulation straight pipe structure, and its material is cross-linked polyethylene.

A number of signal receiving slots 9 are evenly arranged on the inner side of the superconducting layer 7 for transmitting voltage signals.

As shown in Fig. 3, the end of the superconducting cable is provided with a cut-off sheath 11. As shown in Figure 2, the truncated sheath 11 has a multi-layer structure, and the layer structure of the truncated sheath 11 along its radial direction from the inside to the outside corresponds to the superconducting cable. The layer structure of the sleeve 11 excluding the core 1 and the corresponding layer structure of the superconducting cable are all connected by a virtual disconnection 12.

The outer sheath 8 of the superconducting cable end is also provided with a connecting sleeve 13 and a fastening ring 15, and the connecting sleeve 13 and the fastening ring 15 are both sleeved outside the superconducting cable outer sheath and located at all The inside of the truncated sheath 11, and the connecting sleeve 13 is connected to the fastening ring 15 by an elastic connecting rope 14. When two superconducting cables are connected, the connecting sleeve 13 is fixed at the end of the superconducting cable Without moving, pull the fastening ring 15 and fasten the fastening ring 15 on the outer surface of the adapter 10. Wherein, the fastening ring 15 is made of elastic material. Both the connecting sleeve 13 and the fastening ring 15 are provided with positioning holes 16 adapted to the connecting rope.

When the superconducting cable of the present invention is connected, the cut off sheath 11 is torn off, and the cut off sheath is separated from the end of the superconducting cable, so that the cut off sheath can be stripped directly, and the core 1 can be directly reduced in diameter, as shown in the figure As shown in 1, the armored copper wire, the support ring, the high voltage layer, the superconducting layer, the high voltage insulation layer and the low temperature pipe are sequentially exposed, thereby reducing the cutting and use of external equipment and reducing the wear of the superconducting cable. As shown in Figure 5, the cores at the ends of adjacent superconducting cables can be connected through the hollow copper tube. On the outside of the hollow copper tube, carbon paper or cold insulating material is used between the first low-temperature cold insulating layers at the ends of adjacent superconducting cables to complete the connection by semi-stacked spiral winding, to obtain the first low-temperature cold insulating layer connection end. On the outside of the connecting end of the first low-temperature cold insulating layer, the superconducting layers at the ends of the adjacent superconducting cables are connected by spiral winding of YBCO superconducting tape. After the spiral winding is completed, the superconducting layers are connected at the ends of the superconducting layer. Solder connection, as shown in Figure 7. On the outside of the connecting end of the superconducting layer, the second low-temperature cold insulation layers of adjacent superconducting cable ends are also connected by carbon paper or cold insulation material half-wrapped spiral winding to obtain a second low-temperature cold insulation layer Connect the end. The second low-temperature cold insulation layer connection end is integrated into the connection low-temperature pipe, as shown in Figure 6, the connection low-temperature pipe and the low-temperature pipes at the ends of the superconducting cable at both ends are butted to form a low-temperature pipe connection end, where There is no difference in diameter between the low temperature pipe for connection and the low temperature pipe at the ends of the superconducting cable at both ends. An outer protective layer is extruded on the outer surface of the connecting end of the low-temperature pipeline to obtain a conversion joint. Fix the connecting sleeve at the end of the superconducting cable, pull the fastening ring and fasten the fastening ring on the outer surface of the outer sheath of the conversion joint, and the elastic connecting rope covers On the outer surface of the adapter, complete the superconducting cable connection, as shown in Figure 4.

The foregoing descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

An easy-to-connect superconducting cable based on YBCO superconducting material, characterized in that the superconducting cable is provided with a core (1), a first low-temperature cold insulation layer (2), The superconducting layer (3), the second low-temperature cold insulating layer (4), the support ring (5), the low-temperature pipe (6), the armored copper wire (7) and the outer protective layer (8); wherein, the core It is formed by twisting a plurality of copper wires, the first low-temperature cold insulating layer (2) and the second low-temperature cold insulating layer (4) are both spirally wound of cold insulating materials, and the superconducting layer (3) It is a YBCO superconducting tape multi-layer parallel spiral winding structure, and the support ring (5) is arranged at intervals and directly sleeved on the outside of the second low temperature cold insulating layer (4), and the wire core (1) ), the first low-temperature cold insulating layer (2), the superconducting layer (3), the second low-temperature cold insulating layer (4) and the support ring (5) are integrated inside the low-temperature pipeline (6), and the armored copper The wire (7) is spirally wound on the outer side of the low-temperature pipeline (6), and the outer sheath (8) is an insulated straight pipe structure extruded on the outer side of the armored copper wire (7);

The end of the superconducting cable is provided with a cut-off sheath (11), the cut-off sheath (11) is a multilayer structure, and the cut-off sheath (11) is arranged in a radial direction from inside to outside. The structure corresponds to the superconducting cable, and the layer structure of the truncated sheath (11) other than the core (1) and the corresponding layer structure of the superconducting cable are all connected by a virtual disconnection (12);

The outer sheath (8) of the superconducting cable end is also provided with a connecting sleeve (13) and a fastening ring (15), and the connecting sleeve (13) and the fastening ring (15) are both sleeved on the The outer sheath of the superconducting cable is located outside and inside the cut-off sheath (11), and the connecting sleeve (13) is connected to the fastening ring (15) by an elastic connecting rope (14), when two superconducting cables When connecting, the connecting sleeve (13) is fixed at the end of the superconducting cable, and the fastening ring (15) is pulled and the fastening ring (15) is fastened to the conversion joint (10) On the outer surface.
The YBCO superconducting material-based superconducting cable for easy connection according to claim 1, wherein the cold insulating material is PPLP or polyimide film.
The easy-to-connect superconducting cable based on YBCO superconducting material according to claim 1, characterized in that: the support ring (5) is a support ring structure with a spacing width of 10 cm, and the support ring (5) The material is tetrafluoroethylene.
The easy-to-connect superconducting cable based on YBCO superconducting material according to claim 1, characterized in that: the low-temperature pipe (6) is a double-layer non-magnetic stainless steel corrugated pipe, and the inner interlayer is vacuum.
The easy-to-connect superconducting cable based on YBCO superconducting material according to claim 1, characterized in that the material of the outer sheath (8) is a cross-linked polyethylene material.
The easy-to-connect superconducting cable based on YBCO superconducting material according to claim 1, characterized in that: the inner side of the superconducting layer (3) is evenly provided with a number of signal receiving slots for transmitting voltage signals.
The superconducting cable based on YBCO superconducting material for easy connection according to claim 1, wherein the fastening ring (15) is made of elastic material.
The easy-to-connect superconducting cable based on YBCO superconducting material according to claim 1, characterized in that: the connecting sleeve (13) and the fastening ring (15) are both provided with a cable compatible with the connecting rope Positioning hole (16).