A superconducting current limiter current limiting unit and winding method thereof

Abstract

The present application discloses a superconducting current limiter current limiting unit and a winding method thereof, wherein the superconducting current limiter current limiting unit comprises: a coil support, a superconducting coil spirally wound outside the coil support, and a base; the surface of the base is provided with: a downwardly sunken pivot hole, two downwardly sunken slide grooves respectively located on both sides of the pivot hole radially, and two threaded holes respectively connected with the two slide grooves; the bottom of the coil support is pivotally connected to the pivot hole, and a spirally extending embedding groove is arranged around the surface of the coil support, and the superconducting coil is embedded in the embedding groove, and a slider is movably arranged in the slide groove, and the slider is rotatably connected to a screw rod that is threadedly matched with the threaded hole and extends out of the threaded hole, and the slider is fixedly connected to a baffle that extends upward and is located on the side of the coil support. This superconducting current limiter current limiting unit has a simple and ingenious structure, and can quickly and accurately wind the superconducting tape around the outer periphery of the coil support according to the required trajectory during production.

Description

Technical Field

[0001] The present application relates to a superconducting current limiter current limiting unit and a winding method thereof. Background Art

[0002] As an effective short-circuit current limiting device, the superconducting current limiter can quickly limit the short-circuit current to an acceptable level when a short-circuit fault occurs, thereby preventing large short-circuit currents in the power grid from causing serious damage to the safe and stable operation of the power grid and electrical equipment. It can greatly improve the stability of the power grid and improve the reliability and safety of power supply.

[0003] When the superconducting current limiter current limiting unit is produced and assembled, the superconducting tape is installed on a fixed frame in a spiral shape, and then current flows through the superconducting tape to solve the problem of circuit short circuit by limiting the current due to the loss of superresistance of the high-temperature superconductor.

[0004] In order to improve the production efficiency and quality of superconducting current limiters, technicians have been committed to developing a superconducting current limiter with this structure: during production, the superconducting tape can be quickly and efficiently wound around the periphery of the coil bracket according to the required trajectory.

[0005] This application arises from this. Summary of the invention

[0006] The purpose of this application is to propose a superconducting current limiter current limiting unit and a winding method thereof. The superconducting current limiter current limiting unit has a simple and ingenious structure, and during production, the superconducting tape can be quickly and accurately wound around the periphery of the coil support according to the required trajectory.

[0007] The technical solution of this application is:

[0008] A superconducting current limiter current limiting unit, comprising:

[0009] Coil holder, and

[0010] A superconducting coil spirally wound outside the coil support;

[0011] The invention also comprises a base, the surface of which is provided with:

[0012] The downwardly recessed pivot hole,

[0013] two sliding grooves respectively located on both sides of the pivot hole and recessed downward, and

[0014] Two threaded holes extending horizontally inward and communicating with the two slide grooves respectively;

[0015] The bottom of the coil support is pivotally connected to the pivot hole, and a spirally extending embedding groove is arranged around the surface of the coil support, the superconducting coil is embedded in the embedding groove, and a slider is movably arranged in the slide groove, the slider is rotatably connected to a screw rod that is threadedly matched with the threaded hole and extends out of the threaded hole, and the slider is fixedly connected to a baffle that extends upward and is located on the side of the coil support.

[0016] The outer contour of the coil support is cylindrical.

[0017] The side surface of the baffle facing the coil support is an arc surface.

[0018] The top of the coil support is fixedly connected to a vertical pole extending upward, and the top of the vertical pole is detachably connected to a handle.

[0019] A groove is formed at the top of the vertical rod, and a part of the handle is detachably embedded and fixed in the groove.

[0020] The sliding block is provided with a slot, and the bottom of the baffle is provided with a block which is fixed in the slot.

[0021] A rotating shaft extending downward is fixedly arranged at the bottom of the coil support, and the rotating shaft is pivotally inserted in the pivot hole.

[0022] The pivot hole includes an upper hole section and a lower hole section arranged coaxially, both of which are circular holes, and the hole diameter of the upper hole section is smaller than that of the lower hole section; the rotating shaft includes an upper shaft section and a lower shaft section fixedly connected, both of which are cylindrical structures, and the diameter of the upper shaft section is smaller than that of the lower shaft section; the upper shaft section and the lower shaft section are movably embedded in the upper hole section and the lower hole section respectively.

[0023] The method for manufacturing the above-mentioned superconducting current limiter includes: fixing one end of the superconducting tape in the embedding groove, and inserting the superconducting tape between the coil support and the baffle, rotating the screw to drive the baffle to move toward the coil support until the baffle and the coil support are in contact with each other, and then rotating the coil support so that the superconducting tape is embedded in the embedding groove under the limit of the baffle to form the superconducting coil.

[0024] The advantages of the present application are as follows: the superconducting current limiter of the present application is provided with a spirally extending embedding groove around the surface of its coil support, and baffles driven by screws are provided on both sides of the coil support. During manufacturing, the baffles abutting against the outside of the embedding groove are used to limit the winding trajectory of the superconducting tape, so that the superconducting tape is completely wound along the trajectory guided by the spiral embedding groove, and finally a spiral superconducting coil embedded in the embedding groove is formed, which greatly improves the winding speed and winding accuracy of the superconducting coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 This is the general assembly diagram of the current limiting unit of the superconducting current limiter in the embodiment of the present application;

[0027] Figure 2 This is an exploded view of the overall components of the current limiting unit of the superconducting current limiter in the embodiment of the present application;

[0028] Figure 3 This is an exploded view of some components of the current limiting unit of the superconducting current limiter in the embodiment of the present application;

[0029] Figure 4 It is a schematic cross-sectional structural diagram of the base portion of the current limiting unit of the superconducting current limiter in the embodiment of the present application;

[0030] Figure 5 for Figure 4 Magnified view of the X part;

[0031] Figure 6 This is an exploded view of a superconducting current limiter current limiting unit after the superconducting coil is removed from the current limiting unit of the embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of the folded structure of the superconducting tape in the embodiment of the present application;

[0033] in:

[0034] 1-Superconducting coil, 1 ， -superconducting tape, 1a-midpoint, 101-left half, 102-right half, 2-coil support, 201-embedded groove, 3-base, 301-pivot hole, 302-slide groove, 303-threaded hole, 304-screw hole, 301a-upper hole section, 301b-lower hole section, 4-slider, 401-slot, 5-screw, 6-baffle, 601-block, 7-vertical rod, 701-groove, 8-handle, 9-isolation cover, 901-export hole, 902-annular flange, 902a-bolt hole, 10-rotating shaft, 10a-upper shaft section, 10b-lower shaft section, 11-bolt. DETAILED DESCRIPTION

[0035] In order to be able to more clearly understand the above-mentioned purpose, features and advantages of the application, the application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are used to illustrate the application and are not limited to the scope of the application. The implementation conditions adopted in the embodiment can be further adjusted according to the conditions of the specific manufacturer, and the unindicated implementation conditions are generally the conditions in routine experiments. In the following description, a lot of specific details are set forth to fully understand the application, but the application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the application is not limited by the specific embodiments disclosed below.

[0036] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediary medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the description of this specification, the terms "upper", "lower", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0038] Figures 1 to 7 The present invention shows a specific embodiment of the superconducting current limiter current limiting unit that can reduce the influence of magnetic induction. Similar to the conventional superconducting current limiter current limiting unit, it also includes: a coil support 2 and a superconducting coil 1 spirally wound outside the coil support - that is, the superconducting coil is a spiral structure, and the superconducting coil 1 is made of a superconducting tape 1. ， Wound.

[0039] The key improvement of this embodiment is that, in order to facilitate the winding of the superconducting coil 1 outside the coil support 2, a substantially disc-shaped base 3 is further configured, and the upper surface of the base 3 is provided with:

[0040] The pivot hole 301 is recessed downwards,

[0041] Two sliding grooves 302 respectively located on both sides of the pivot hole and recessed downwards, and

[0042] Two threaded holes 303 extend horizontally inward and are respectively connected to the two slide grooves.

[0043] The bottom of the coil support 2 is pivotally connected to the pivot hole 301, and the surface of the coil support 2 is surrounded by a spirally extending embedding groove 201, and the superconducting coil 1 is embedded in the embedding groove 201. The slide 4 is movably arranged in the slide groove 302, and the slide 4 is rotatably connected to the screw 5 that is threadedly matched with the threaded hole 303 and extends out of the threaded hole 303. The slide 4 is fixedly connected to the baffle 6 that extends upward and is located on the side of the coil support 2.

[0044] Specifically, the outer contour of the coil support 2 is cylindrical, and the embedding groove 201 is arranged around the circumferential surface of the cylinder.

[0045] During the production process, the superconducting tape 1 is pre- ， One end (see below, the “one end” is actually the folded part at the midpoint of the superconducting tape) is fixed in the embedding groove 201 (the lower end of the embedding groove 201), and the superconducting tape 1 is fixed in the embedding groove 201. ， Insert between the coil support 2 and (one of) the baffles 6. Rotate the screw 5 manually or with the aid of a tool, and the screw 5 rotates and moves toward the slide slot 302 by virtue of the external thread on its surface cooperating with the thread of the threaded hole 303 on the base 3. The slider 4, which is rotatably connected to the screw 5, moves toward the pivot hole 301 and the coil support 2 under the drive of the screw 5, and the slider 4 drives the baffle 6 fixed thereto to move toward the coil support 2 until the baffle 6 and the coil support 2 are in contact with each other, and the screw 5 stops rotating. At this time, the superconducting tape 1 ， A portion of the superconducting tape is embedded in the groove 201 and pressed between the coil support 2 and (one of) the baffles 6. Then the coil support 2 is rotated, and the end of the superconducting tape previously fixed in the groove 201 of the coil support 2 rotates synchronously with the coil support 2, so that the superconducting tape 1 ， The superconducting tape 1 is wound around the outer periphery of the coil support 2. ， The baffle 6 is always blocked and limited, so that the superconducting tape 1 ， The coil is completely wound along the trajectory guided by the spiral embedding groove 201, and finally a spiral superconducting coil 1 embedded in the embedding groove is formed.

[0046] The fixed connection method of the above-mentioned slider 4 and the baffle 6 is specifically as follows: a clamping groove 401 is provided on the slider 4 , and a clamping block 601 which is clamped and fixed in the clamping groove 401 is provided at the bottom of the baffle 6 .

[0047] The pivotal connection between the coil support 2 and the base 3 is specifically as follows: a rotating shaft 10 extending downward is fixedly provided at the bottom of the coil support 2 , and the rotating shaft 10 is pivotally inserted into the pivot hole 301 of the base 3 .

[0048] Furthermore, the pivot hole 301 comprises an upper hole section 301a and a lower hole section 301b arranged coaxially, the upper hole section 301a and the lower hole section 301b are both circular holes, and the hole diameter of the upper hole section 301a is smaller than the hole diameter of the lower hole section 301b. The rotating shaft 10 comprises an upper shaft section 10a and a lower shaft section 10b which are fixedly connected, the upper shaft section 10a and the lower shaft section 10b are both cylindrical structures, and the diameter of the upper shaft section 10a is smaller than the diameter of the lower shaft section 10b; the upper shaft section 10a and the lower shaft section 10b are movably embedded in the upper hole section 301a and the lower hole section 301b respectively.

[0049] It is easy to understand that the aforementioned mutually cooperating lower shaft section 10 b and lower hole section 301 b have a limiting effect on the connection between the rotating shaft 10 and the base 3 , thereby preventing the rotating shaft 10 from being separated from the base 3 .

[0050] Considering that the outer contour of the coil support 2 in this embodiment is cylindrical, in this embodiment, the side surface of the baffle 6 facing the coil support 2 is set to be an arc surface.

[0051] To facilitate the rotation of the coil support 2 when winding the superconducting coil 1, in this embodiment, a vertical rod 7 extending upward is fixedly connected to the top of the coil support 2, and a handle 8 is detachably connected to the top of the vertical rod 7. The coil support 2 can be rotated by holding the handle 8.

[0052] The detachable connection structure between the handle 8 and the vertical rod 7 is specifically as follows: a groove 701 is provided at the top of the vertical rod 7, and a part of the handle 8 is detachably embedded and fixed in the aforementioned groove.

[0053] Reference Figure 7 As shown, the superconducting tape 1 ， The superconducting coil 1 is formed by folding in half at the midpoint 1a in the longitudinal direction and then spirally winding. ， Before being wound into a spiral superconducting coil, the superconducting tape 1 ， The superconducting coil 1 is formed by folding the coil in half at the midpoint 1a thereof and then spirally winding the coil. The superconducting coil 1 of this structure has very low inductance.

[0054] The superconducting tape 1 ， Adopt YBCO superconducting tape with excellent performance.

[0055] Furthermore, in the above-mentioned superconducting tape 1 ， When the middle part is folded, the degree and shape of the fold should be well controlled (the bending radius should not be too small) to ensure that the folded part still has superconductivity. ， The folded portion is arranged to be an arc-shaped structure.

[0056] Obviously, superconducting tape 1 ， The superconducting coil 1 can be divided into a left half 101 and a right half 102 by taking the midpoint 1a as the boundary point. ， After the coil unit 1 is folded in half at its midpoint and wound into a spiral shape, it is best to ensure that the left half section 101 and the right half section 102 are arranged close to each other at all locations.

[0057] In addition, the present embodiment is further provided with an isolation cover 9 covering the coil support 2 and the superconducting coil 1. The isolation cover 9 is fixedly connected to the base 3, and a lead-out hole 901 is provided on the cover wall of the isolation cover 9. The end of the superconducting coil 1 is led out from the lead-out hole 901 to connect to an external circuit. The isolation cover 9 disposed outside the coil can form an electrostatic shielding field, thereby reducing the negative impact of the magnetic induction generated by the superconducting coil.

[0058] The bottom of the isolation cover 9 is an open structure, and a circle of radially outwardly protruding annular flange 902 is integrally provided at the open bottom of the isolation cover 9. The annular flange 902 at the bottom of the isolation cover 9 is fastened to the base 3 by bolts 11 - this is the connection method between the isolation cover 9 and the base 3.

[0059] Furthermore, the annular flange 902 is vertically penetrated with a plurality of bolt holes 902a evenly distributed along the circumferential direction, and the upper surface of the base 3 is provided with a plurality of screw holes 304 extending downward and evenly distributed along the circumferential direction, and a plurality of bolts 11 are respectively passed through each bolt hole 902a and are locked and connected with the corresponding screw holes 304. The base 3 completely blocks the opening at the bottom of the isolation cover 9 to enhance the protection of the internal coil.

[0060] The above-mentioned isolation cover 9 and coil support 2 are both made of iron. The inner cavity of the isolation cover 9 is a cylindrical inner cavity adapted to the outer shape of the coil support, and the isolation cover 9 and the coil support 2 are arranged in a tightly fitting manner, so that the embedding groove 201 is sealed and the shielding performance is better.

[0061] Obviously, the isolation cover 9 which is closely fitted with the coil support 2 has a position fixing function for the coil support 2 and the superconducting coil 1. During manufacturing, after the superconducting coil 1 is wound, the isolation cover 9 is locked.

[0062] Of course, the above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the main technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A superconducting current limiter current limiting unit, comprising: a coil support (2), and A superconducting coil (1) spirally wound outside the coil support; The invention is characterized in that it further comprises a base (3), the surface of the base (3) being provided with: A pivot hole (301) recessed downwards, two sliding grooves (302) respectively located on both sides of the pivot hole and recessed downwards, and Two threaded holes (303) extending horizontally inward and respectively communicating with the two slide grooves; The bottom of the coil support (2) is pivotally connected to the pivot hole (301), a rotating shaft (10) extending downward is fixedly arranged at the bottom of the coil support (2), the rotating shaft (10) is pivotally inserted in the pivot hole (301), and a surface of the coil support (2) is surrounded by a helically extending embedding groove (201), the superconducting coil (1) is embedded in the embedding groove (201), a slider (4) is movably arranged in the slide groove (302), the slider (4) is rotatably connected to a screw rod (5) threadably matched with the threaded hole (303) and extending out of the threaded hole (303), and the slider (4) is fixedly connected to a baffle (6) extending upward and located on the side of the coil support (2).

2. The superconducting current limiter current limiting unit according to claim 1, characterized in that: The outer contour of the coil support (2) is cylindrical.

3. The superconducting current limiter current limiting unit according to claim 2, characterized in that: The side surface of the baffle (6) facing the coil support (2) is an arc surface.

4. The superconducting current limiter current limiting unit according to claim 1, characterized in that: The top of the coil support (2) is fixedly connected to a vertical pole (7) extending upward, and the top of the vertical pole (7) is detachably connected to a handle (8).

5. The superconducting current limiter current limiting unit according to claim 4, characterized in that: A groove (701) is formed at the top end of the upright pole (7), and a portion of the handle (8) is detachably embedded and fixed in the groove (701).

6. The superconducting current limiter current limiting unit according to claim 1, characterized in that: The sliding block (4) is provided with a slot (401), and the bottom of the baffle (6) is provided with a block (601) which is engaged and fixed in the slot (401).

7. The superconducting current limiter current limiting unit according to claim 1, characterized in that: The pivot hole (301) comprises an upper hole section (301a) and a lower hole section (301b) which are coaxially arranged, the upper hole section (301a) and the lower hole section (301b) are both circular holes, and the hole diameter of the upper hole section (301a) is smaller than the hole diameter of the lower hole section (301b); the rotating shaft (10) comprises an upper shaft section (10a) and a lower shaft section (10b) which are fixedly connected, the upper shaft section (10a) and the lower shaft section (10b) are both cylindrical structures, and the diameter of the upper shaft section (10a) is smaller than the diameter of the lower shaft section (10b); the upper shaft section (10a) and the lower shaft section (10b) are movably embedded in the upper hole section (301a) and the lower hole section (301b), respectively.

8. A method for winding a current limiting unit of a superconducting current limiter according to any one of claims 1 to 7, characterized in that: include: One end of a superconducting tape (1') is fixed in the embedding groove (201), and the superconducting tape (1') is inserted between the coil support (2) and the baffle (6), and the screw (5) is rotated to drive the baffle (6) to move toward the coil support (2) until the baffle (6) and the coil support (2) are in contact with each other, and then the coil support (2) is rotated so that the superconducting tape (1') is embedded in the embedding groove (201) under the limit of the baffle (6) to form the superconducting coil (1).

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