A superconducting shielded signal line for protection against magnetic field pulses

Abstract

The present invention discloses a superconducting shielded signal line for preventing magnetic field pulses, the signal line mainly comprises a single-strand or multiple-strand Teflon conductor, a Teflon coating layer or a copper layer, a double-layer cross-folded high-temperature superconducting tape layer, a copper layer, and an insulating layer. The main mutual cooperation relationship is that the outer layer of the single-strand or multiple-strand mutually twisted Teflon conductor is coated with a Teflon layer or a copper layer casing, wherein the double-layer cross-folded high-temperature superconducting tape layer can also be a multi-layer cross-folded high-temperature superconducting tape layer. The Teflon layer or copper layer is a spiral structure or a casing structure, the outer layer of the Teflon layer or copper layer is coated with a double-layer cross-folded superconducting tape, the outer layer of the double-layer cross-folded superconducting tape is coated with a copper layer, and the outermost layer is coated with an insulating layer. The present invention can be used for electrical signal transmission in liquid helium, liquid nitrogen, and conductive cooling systems.

Description

Technical Field

[0001] The invention belongs to the technical field of superconducting magnets, and in particular relates to a superconducting shielding signal line for preventing magnetic field pulses. Background Art

[0002] When superconducting magnets are running or in other systems with low temperature environments, in some application scenarios, it is necessary to shield against interference from external strong magnetic pulse signals. Existing system signal cables are low-temperature signal wires twisted into cables, which cannot achieve the signal interference resistance of strong magnetic pulses. Summary of the invention

[0003] In order to solve the above problems, the present invention uses a winding device to bidirectionally wrap two layers of YBCO superconducting tapes and other high-temperature superconducting materials as a superconducting shielded cable. The superconducting shielding layer is directly linked to the conductive screen or immersed in liquid nitrogen or liquid helium to achieve superconducting shielding, thereby obtaining a superconducting shielded signal line with strong anti-interference ability and good low-temperature stability for preventing magnetic field pulses. The superconducting shielded cable can achieve magnetic shielding when there is external medium-strong magnetic pulse interference.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] A superconducting shielded signal line for preventing magnetic field pulses comprises a Teflon conductor, a coating layer, a cross-folded high-temperature superconducting tape, a copper layer and an insulating layer; the outer side of the Teflon conductor is wrapped with the coating layer, and the coating layer is a spiral coating layer or a sleeve-shaped coating layer; the outer side of the coating layer is wrapped with the cross-folded high-temperature superconducting tape; in a liquid helium-free environment, the outer side of the cross-folded high-temperature superconducting tape is wrapped with the copper layer, and the outermost side of the copper layer is wrapped with an insulating layer; the cross-folded high-temperature superconducting tape has at least two layers.

[0006] Furthermore, the cross-folded structure high-temperature superconducting tape is two layers, including a first layer of cross-folded structure superconducting tape and a second layer of cross-folded structure superconducting tape. The first layer of cross-folded structure superconducting tape is arranged in two rows side by side as a group, and the second layer of cross-folded structure superconducting tape is also arranged in two rows side by side as a group. The second layer of cross-folded structure superconducting tape is coated on the outside of the first layer of cross-folded structure superconducting tape, and the two layers of superconducting tapes are reversely equidistantly cross-folded and wound structures.

[0007] Furthermore, a single strand or multiple strands of the Teflon wire are twisted together into a cable using a twisting device, and then the coating layer is wrapped around the outside of the cable.

[0008] Furthermore, a spiral coating layer having a spiral structure is formed by bidirectional winding using a winding device.

[0009] Furthermore, the material of the coating layer is Teflon or copper.

[0010] Furthermore, the double-layer cross-folded high-temperature superconducting tape is replaced by a multi-layer cross-folded high-temperature superconducting tape.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The multi-strand twisted Teflon wire reduces the coupling effect of the strands; the Teflon coating or copper layer wrapped around the outside of the wire can provide good protection and support for the Teflon wire; the double-layer or multi-layer cross-folded structure of the high-temperature superconducting tape can play a good signal shielding role; the copper layer in a liquid helium-free environment can isolate heat and achieve a good insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric diagram of a superconducting shielding signal line for preventing magnetic field pulses of the present invention;

[0014] Figure 2 It is an axonometric diagram of the sleeve-shaped superconducting shielding signal line of the present invention;

[0015] Figure 3 A cross-sectional view of a superconducting shielding signal line for preventing magnetic field pulses according to the present invention;

[0016] Figure 4 The schematic diagram of the double-layer cross-folded superconducting tape structure of the superconducting shielding signal line for preventing magnetic field pulses of the present invention.

[0017] Among them, 1-Teflon wire, 2-spiral coating layer, 3-layer cross-folded structure high-temperature superconducting tape, 4-copper layer, 5-insulating layer, 6-sleeve-shaped coating layer, 7-first layer of cross-folded structure superconducting tape, 8-second layer of cross-folded structure superconducting tape. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1 As shown, the superconducting shielded signal line for preventing magnetic field pulses of the present invention comprises a Teflon conductor 1, a coating layer, a double-layer cross-folded high-temperature superconducting tape 3, a copper layer 4 in a liquid helium-free environment, and an insulating layer 5. The single or multiple strands of the Teflon conductor 1 are twisted with each other. The outer side of the Teflon conductor 1 is wrapped with a coating layer, and the material of the coating layer is Teflon or copper. The coating layer can be a spiral coating layer 2 formed by spiral winding or a spiral coating layer 2 formed by spiral winding. Figure 2 The sleeve-shaped coating layer 6 is shown. The double-layer cross-folded high-temperature superconducting tape 3 is wrapped on the outside of the coating layer, wherein the double-layer cross-folded high-temperature superconducting tape 3 can also be replaced by a multi-layer cross-folded high-temperature superconducting tape. In a liquid helium-free environment, the copper layer 4 is wrapped on the outside of the double-layer cross-folded high-temperature superconducting tape 3, and the insulating layer 5 is wrapped on the outermost side of the copper layer 4. Figure 4 As shown, the double-layer cross-folded structure high-temperature superconducting tape 3 includes a first layer of cross-folded structure superconducting tape 7 and a second layer of cross-folded structure superconducting tape 8. The first layer of cross-folded structure superconducting tape 7 is arranged in two rows side by side as a group, and the second layer of cross-folded structure superconducting tape 8 is also arranged in two rows side by side as a group. The second layer of cross-folded structure superconducting tape 8 is coated on the outside of the first layer of cross-folded structure superconducting tape 7, and the two layers of superconducting tapes are respectively in reverse equidistant cross-folded winding structures.

[0020] like Figure 3 As shown in FIG. 1 , the manufacturing process of the superconducting shielding signal line for preventing magnetic field pulses of the present invention is as follows: firstly, a single strand or multiple strands of Teflon wires 1 are twisted into a cable by a stranding device, and then a coating layer made of Teflon or copper is wrapped on the outside of the cable in the shape of Figure 2 The sleeve-shaped coating layer 6 shown is a spiral coating layer 2 that is bidirectionally wound into a spiral structure by a winding device. A double-layer cross-folded high-temperature superconducting tape 3 or a multi-layer cross-folded high-temperature superconducting tape is wrapped on the outside of the coating layer. In an environment without liquid helium, a copper layer 4 is wrapped on the outside of the double-layer cross-folded high-temperature superconducting tape 3 or a multi-layer cross-folded high-temperature superconducting tape. In an environment with liquid helium, the copper layer 4 can be eliminated. Finally, the insulating layer 5 is wrapped on the outermost side.

[0021] 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.

Claims

1. A superconducting shielded signal line for preventing magnetic field pulses, characterized in that: The invention comprises a Teflon conductor, a coating layer, a cross-folded high-temperature superconducting tape, a copper layer and an insulating layer; the coating layer is wrapped around the outside of the Teflon conductor, and the coating layer is a spiral coating layer or a sleeve-shaped coating layer; the cross-folded high-temperature superconducting tape is wrapped around the outside of the coating layer; in a liquid helium-free environment, the copper layer is wrapped around the outside of the cross-folded high-temperature superconducting tape, and the insulating layer is wrapped around the outermost side of the copper layer; the cross-folded high-temperature superconducting tape is two layers, including a first layer and a second layer, the first layer has two columns arranged side by side as a group, and the second layer also has two columns arranged side by side as a group, the second layer is wrapped around the outside of the first layer, and the two layers of superconducting tape are a reverse equidistant cross-folded winding structure.

2. A superconducting shielded signal line for preventing magnetic field pulses according to claim 1, characterized in that: The single or multiple strands of Teflon wire are twisted together into a cable using a twisting device, and then the sheath is wrapped around the outside of the cable.

3. A superconducting shielded signal line for preventing magnetic field pulses according to claim 1, characterized in that: The spiral coating layer having a spiral structure is formed by bidirectional winding using a winding device.

4. A superconducting shielded signal line for preventing magnetic field pulses according to claim 1, characterized in that: The material of the coating layer is Teflon or copper.

Images