High-temperature superconducting cable structure

Abstract

The invention discloses a high-temperature superconducting cable structure, which comprises a plurality of mutually spliced central supporting pieces (1), the surface of each central supporting piece (1) is provided with a group of axial slots (2) which are annularly distributed and have T-shaped cross sections, the axial slots (2) are connected with axial supporting frames (3), the axial supporting frames (3) are internally provided with grooves (4), and the grooves (4) are internally provided with high-temperature superconducting cables (5) and anti-drop covers (6); the heat preservation and insulation layer (7), the wrapping layer (8) and the armor layer (9) are located outside the axial supporting frame (3). The method has the characteristics of effectively improving the production speed and reducing the production cost.

Description

Technical Field

[0001] The invention relates to the field of high-temperature superconducting cables, in particular to a high-temperature superconducting cable structure. Background Art

[0002] High-temperature superconducting cables have outstanding advantages such as large capacity, low loss, self-limiting current, and environmental friendliness. They are an emerging solution to solve the problem of upgrading urban power grids, achieve high-efficiency power transmission, and enable large-capacity power applications. At present, the traditional high-temperature superconducting cable structure mainly includes a central support frame, multiple superconducting conductor cables arranged outside the support frame, and a cooling system for maintaining the superconducting state. The support frame is usually made of high-strength materials to ensure sufficient mechanical strength and stability during cable operation; superconducting conductor cables are made of superconducting materials, which exhibit zero resistance characteristics at low temperatures, thereby achieving efficient power transmission; the cooling system is a key part of the entire high-temperature superconducting cable structure. It usually uses liquid nitrogen or other cooling media to maintain the superconducting cable below the critical temperature to ensure its superconducting performance.

[0003] However, the existing support frame is generally an integrated structure, and the length required for different usage scenarios is also different, so the factory needs to customize the production according to actual needs, which is slow, complicated and costly. Therefore, the existing technology has the problems of slow production speed and high cost. Summary of the invention

[0004] The purpose of the present invention is to provide a high-temperature superconducting cable structure, which has the characteristics of being able to effectively increase production speed and reduce production costs.

[0005] The technical solution of the present invention is: a high-temperature superconducting cable structure, including a plurality of central support members spliced ​​to each other, each central support member having a group of annularly distributed axial slots with a T-shaped cross-section on the surface, an axial support frame connected to the axial slot, the axial support frame having a groove in the groove, a high-temperature superconducting cable and an anti-detachment cover in the groove; and also including a thermal insulation layer, a coating layer and an armor layer located outside the axial support frame.

[0006] In the aforementioned high-temperature superconducting cable structure, L-shaped slots are provided on both sides of the axial support frame; it also includes a cooling support frame, a cooling channel is provided in the cooling support frame, and clamping plates are provided on both sides of the cooling support frame to match the L-shaped slots of two adjacent axial support members.

[0007] In the aforementioned high-temperature superconducting cable structure, sealing step grooves are provided at both ends of the cooling channel, and secondary sealing grooves are provided on the inner wall of the sealing step grooves; it also includes an annular sealing gasket located between two adjacent sealing step grooves, and secondary sealing rings are provided at both ends of the outer side of the annular sealing gasket.

[0008] In the aforementioned high-temperature superconducting cable structure, the central support member includes a hollow central tube, one end of the central tube is provided with an internal threaded surface, the other end of the central tube is provided with a matching external threaded column, and the bottom end surface of the external threaded column is also sleeved with a sealing ring.

[0009] In the aforementioned high-temperature superconducting cable structure, the central support member includes a hollow central tube, one end of the central tube is provided with an internal threaded surface, the other end of the central tube is provided with a matching external threaded column, and the bottom end surface of the external threaded column is also sleeved with a sealing ring.

[0010] In the aforementioned high-temperature superconducting cable structure, the anti-detachment cover includes a cover body matching the shape of the groove, an inner cover matching the shape of the high-temperature superconducting cable is provided inside the cover body, and a telescopic rod and a spring are provided between the inner cover and the cover body.

[0011] Compared with the prior art, the present invention is composed of a plurality of mutually spliced ​​central supports, axial support frames, high-temperature superconducting cables and anti-stripping covers, thermal insulation layers, coating layers and armor layers arranged in the axial support frames, which can effectively improve the production speed and reduce the production cost under the premise of ensuring that the high-temperature superconducting cable can stably exert its performance. Specifically, the support member of the present application is composed of a plurality of mutually spliced ​​central supports, and a plug-in axial support frame (for placing the high-temperature superconducting cable) is arranged on the surface of each central support member, so that modular production can be realized, and only splicing is required according to the length required by the customer, without customized production, and only one set of molds is required, so that the production efficiency can be effectively improved and the production cost can be reduced. At the same time, the present application arranges a cooling support frame fixed by plugging between the axial support frames, and a built-in cooling channel, which can ensure the connection stability of adjacent axial support frames on the one hand, and cooperate with the hollow central support member on the other hand, and can cool and dissipate the high-temperature superconducting cable from multiple positions, thereby ensuring the performance of the high-temperature superconducting cable. In summary, the present invention has the characteristics of being able to effectively improve the production speed and reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 It is a schematic diagram of assembling adjacent cooling support frames.

[0014] The markings in the accompanying drawings are: 1-center support member, 2-axial slot, 3-axial support frame, 4-groove, 5-high-temperature superconducting cable, 6-anti-drop cover, 7-thermal insulation layer, 8-coating layer, 9-armor layer, 10-L-shaped slot, 11-cooling support frame, 12-cooling channel, 13-card plate, 14-sealing step groove, 15-secondary sealing groove, 16-annular sealing gasket, 17-secondary sealing ring. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0016] Embodiment. A high temperature superconducting cable structure is composed of Figure 1-2 As shown, it includes a plurality of central support members 1 connected to each other, each of which is provided with a group of axial slots 2 with annular distribution and T-shaped cross-section on the surface, an axial support frame 3 is connected to the axial slot 2, a groove 4 is provided in the axial support frame 3, a high-temperature superconducting cable 5 and an anti-detachment cover 6 are provided in the groove 4; it also includes a thermal insulation layer 7, a coating layer 8 and an armor layer 9 located outside the axial support frame 3.

[0017] The axial support frame 3 has L-shaped slots 10 on both sides; it also includes a cooling support frame 11, a cooling channel 12 is provided in the cooling support frame 11, and clamping plates 13 are provided on both sides of the cooling support frame 11 to match the L-shaped slots 10 of two adjacent axial support members 3.

[0018] The cooling channel 12 has sealing step grooves 14 at both ends, and a secondary sealing groove 15 on the inner wall of the sealing step groove 14; it also includes an annular sealing pad 16 located between two adjacent sealing step grooves 14, and secondary sealing rings 17 at both ends of the outer side of the annular sealing pad 16. It can play a sealing role and a positioning role to prevent the displacement between the two adjacent cooling support frames.

[0019] The central support member 1 comprises a hollow central tube, one end of which is provided with an internal thread surface, and the other end of which is provided with a matching external thread column, and a sealing ring is also sleeved on the bottom end surface of the external thread column.

[0020] The axial support frame of the present application is connected to the axial slot by plugging, so that the axial support frame of corresponding specifications and shapes can be selected according to the high-temperature superconducting cables of different specifications, and the installation is more flexible and convenient. As a preferred embodiment, after the axial support frame is plugged in place, it is fixed to the central support member by screws.

[0021] High-temperature superconducting cables can be made of superconducting wires and strips including the first-generation Bi series, the second-generation Y series, and iron-based.

[0022] The thermal insulation layer is phenolic resin or rock wool or vacuum glass wool.

[0023] The anti-drop cover comprises a cover body matching the shape of the groove, an inner cover matching the shape of the high-temperature superconducting cable is arranged on the inner side of the cover body, and a telescopic rod and a spring are arranged between the inner cover and the cover body; through the mutual cooperation between the above structures, the high-temperature superconducting cable can be effectively supported and fixed, and the stress can be dispersed and supported inside the cable, thereby reducing the stress-strain performance degradation characteristics of the cable and improving the operation stability.

[0024] The center support, axial support frame, anti-drop cover and cooling support frame can all be mass-produced.

[0025] The installation and splicing process of the present invention is as follows: an axial support frame is inserted into the axial slot of each central support member, and then it is fixed by screws; during assembly, first on the central support member at the head end, a cooling support frame equipped with an annular sealing gasket at one end of the sealing step groove (located on the side of the inner thread surface of the central tube) is inserted between adjacent axial support frames, and the clamping plate is engaged with the L-shaped clamping groove (the adjacent axial support frames are connected and fixed), and the installation of the components on the central support frame is completed; then the inner thread surface of the adjacent central support member is screwed into the outer thread column of the central support member at the head end, and after tightening, the cooling support member equipped with the annular sealing gasket is inserted between the adjacent axial support frames until the annular sealing gasket is engaged with the sealing step groove of the cooling channel of the cooling support member at the head end, so as to realize the assembly of the two central support members; according to the above steps, the remaining central support members are assembled in sequence, and after completion, the high-temperature superconducting cable is placed in the groove, and the anti-detachment cover is placed in the groove, and then the thermal insulation layer, the coating layer and the armor layer are sequentially coated to complete the production.

[0026] When in use, the hollow part of the central support constitutes a central cooling channel, and the cooling channels of each cooling support frame constitute an external cooling channel, which is connected to the cooling system to circulate the cooling medium (such as liquid nitrogen) to achieve multiple cooling of the high-temperature superconducting cable, thereby effectively improving the cooling effect.

[0027] Preferably, the high-temperature superconducting cable comprises a central support skeleton, one or more concentrically distributed outer support skeletons are arranged outside the central support skeleton, an outer insulating layer, a thermal insulation layer and an outer protective sleeve are arranged on the outer side of the outermost outer support skeleton in sequence, and an anti-corrosion protective layer is also arranged outside the outer protective sleeve;

[0028] The central support skeleton comprises a central tube of a hollow cylindrical structure, a group of axial plug-in strips with a T-shaped cross section and annular distribution are arranged on the outer surface of the central tube, and an axial superconducting tape located on the surface of the central tube is arranged between adjacent axial plug-in strips;

[0029] The outer support skeleton comprises an outer tube with a hollow cylindrical structure, an inner rotating sleeve and an outer rotating sleeve are respectively arranged on the inner and outer sides of the outer tube, an inner surface of the inner rotating sleeve is provided with an inner axial plug-in strip matching with the axial plug-in strip, an inner superconducting tape is arranged between adjacent inner axial plug-in strips, and an outer surface of the outer rotating sleeve is provided with a matching outer axial plug-in strip, an outer superconducting tape is arranged between adjacent outer axial plug-in strips.

[0030] The high-temperature superconducting cable is composed of a central support skeleton, one or more concentrically distributed outer support skeletons, an outer insulating layer, a thermal insulation layer, an outer protective sleeve and an anti-corrosion protective layer arranged outside the outer support skeleton. The central support skeleton and the outer support skeleton are connected by plug-in, which is convenient for installation. An axial superconducting tape is arranged outside the central support skeleton, and an inner superconducting tape and an outer superconducting tape are arranged on the inner and outer sides of the outer support skeleton, so that the axial superconducting tape, the inner superconducting tape and the outer superconducting tape can be staggered and stacked, effectively reducing AC loss; and the number of stacked layers of the tape can also be increased to improve the power transmission capacity. At the same time, the inner and outer sides of the outer support skeleton of the present application are provided with a rotatable inner rotating sleeve and an outer rotating sleeve structure, so that the staggered position between the inner and outer superconducting tapes can be flexibly adjusted to further reduce AC loss.

Claims

1. A high temperature superconducting cable structure, characterized in that: The invention comprises a plurality of central support members (1) connected to each other, each central support member (1) having a group of axial slots (2) distributed in an annular manner and having a T-shaped cross section on its surface, an axial support frame (3) being connected to the axial slots (2), a groove (4) being provided in the axial support frame (3), a high-temperature superconducting cable (5) and an anti-detachment cover (6) being provided in the groove (4); and also comprising a thermal insulation layer (7), a coating layer (8) and an armor layer (9) located outside the axial support frame (3).

2. A high temperature superconducting cable structure according to claim 1, characterized in that: The axial support frame (3) is provided with L-shaped slots (10) on both sides; it also includes a cooling support frame (11), a cooling channel (12) is provided in the cooling support frame (11), and clamping plates (13) are provided on both sides of the cooling support frame (11) to match the L-shaped slots (10) of two adjacent axial support members (3).

3. A high temperature superconducting cable structure according to claim 1, characterized in that: The cooling channel (12) is provided with sealing step grooves (14) at both ends, and a secondary sealing groove (15) is provided on the inner wall surface of the sealing step groove (14); and also includes an annular sealing gasket (16) located between two adjacent sealing step grooves (14), and secondary sealing rings (17) are provided at both ends of the outer side surface of the annular sealing gasket (16).

4. A high temperature superconducting cable structure according to claim 1, characterized in that: The central support member (1) comprises a hollow central tube, one end of which is provided with an internal thread surface, and the other end of which is provided with a matching external thread column, and the bottom end surface of the external thread column is also sleeved with a sealing ring.

5. A high temperature superconducting cable structure according to claim 1, characterized in that: The anti-drop cover (6) comprises a cover body whose shape matches that of the groove (4); an inner cover whose shape matches that of the high-temperature superconducting cable (5) is arranged inside the cover body; a telescopic rod and a spring are arranged between the inner cover and the cover body.

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