Method for measuring length of superconductive braided flat wire by utilizing accumulation of turn number

A number of turns, superconducting technology, applied in the field of superconducting braided flat wire length, can solve the problems of high cost, not suitable for large-scale production, easy to damage the braiding layer, etc., achieve process standardization, solve instability factors, and simple operation the effect of

A number of turns, superconducting technology, applied in the field of superconducting braided flat wire length, can solve the problems of high cost, not suitable for large-scale production, easy to damage the braiding layer, etc., achieve process standardization, solve instability factors, and simple operation the effect of

CN110608698AInactive Publication Date: 2019-12-24西部超导材料科技股份有限公司
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  • Method for measuring length of superconductive braided flat wire by utilizing accumulation of turn number
  • Method for measuring length of superconductive braided flat wire by utilizing accumulation of turn number
  • Method for measuring length of superconductive braided flat wire by utilizing accumulation of turn number

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: The present invention uses the cumulative number of turns to measure the method for the length of superconducting braided flat wire

[0041] The invention provides a method for measuring the length of a superconducting braided flat wire by accumulating the number of turns, comprising the following steps:

[0042] (1) Measure the cylinder diameter D of the braided wire take-up wheel.

[0043] (2) Clean the close-packed rewinding equipment, put the reel 1 into the close-packed rewinding equipment take-up machine, prepare a superconducting flat wire with a braided layer, and fix the superconducting flat wire to the close-packed rewinding equipment Pay-off machine, pass the thread ends through each guide wheel, laser meter system and cable arrangement in turn, and finally receive it on the take-up wheel, set the rewinding tension to 20N, start densely arranging rewinding wires, and the rewinding speed is less than 50m / min, start the laser meter counter and t...

Embodiment 2

[0051] Embodiment 2: Accuracy measurement of the method of measuring the length of superconducting braided flat wire by accumulative number of turns in the present invention

[0052] Step 1: Take 4 selected wire wheels, clean the surface in contact with the wire, wipe it with clean water, dehydrate with absolute ethanol, and blow dry.

[0053] Step 2: Use a long claw vernier caliper to measure the cylinder diameter of each reel to ensure that the cylinder diameter is within D 名义 Within the range of ±1mm, they are named as spool 2, spool 3, spool 4, and spool 5. Please refer to the appendix figure 1 .

[0054] Step 3: Select 4 wires with the same nominal size as NbTi 1, and name them NbTi 2, NbTi 3, NbTi4, and NbTi 5 respectively.

[0055] Step 4: Select the corresponding reel and wire (such as reel 2 and NbTi 2), and prepare for rewinding, that is, step 3 (step 1 to step 4).

[0056] Step 5: Increase the number of turns counter on the rewinding equipment, see the attached ...

Embodiment 3

[0060] Embodiment three: the volume measuring device of the present invention

[0061] In the present invention, the braided wire take-up reel is put into the volume measuring device to measure the volume, and the braided wire take-up reel is classified according to different specifications through the detection liquid volume discharged after the braided wire take-up reel is put in. The volume measurement device includes a detection Tank 1, detection liquid tank 2 and pipeline 4, the bottom of the detection tank 1 and detection liquid tank 2 are connected through the pipeline 4, a telescopic rod 3 is arranged under the middle part of the pipeline 4, a valve 5 is arranged on the pipeline 4, and the detection tank 1 There is a gap on the side, and a sealing plate 7 is provided at the gap, and the sealing plate 7 protrudes through the bottom of the detection tank 1, and a measuring tube 6 is provided on the side of the testing tank 1 opposite to the gap, and the measuring tube 6 a...

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Abstract

The invention provides a method for measuring a length of a superconductive braided flat wire by utilizing accumulation of a turn number. The method comprises the steps that: a cylinder diameter D isunified; a thread end of the superconductive flat wire is enabled to sequentially pass through each guide wheel, a laser meter counting system and a wire arrangement device and finally is taken up ona take-up wheel; a compound winding tension is set as 25N; close-packed compound winding of the wire is started, wherein a compound winding speed is 50m / min; four parameters, such as a layer turn number Ni, a first-layer single turn length x1, a tolerance delta x and a total turn number N after compound winding is ended, are obtained by a compound winding experiment, and a corresponding wire length L is calculated by a turn number meter counting formula; the wire length L is compared to a length displayed by a laser meter counting device to calculate turn number meter counting accuracy. According to the invention, after a plurality of pieces of data are simply measured, high-accuracy meter counting can be implemented by utilizing a counter; and accuracy can reach 0.3%.

Description

technical field [0001] The invention belongs to the technical field of superconducting material processing, and relates to a method for braiding the length of a superconducting flat wire. Background technique [0002] Low temperature superconducting wire is currently the most widely used superconductor material, among which NbTi and Nb 3 Sn is the representative. They are widely used in magnetic resonance imaging (MRI), nuclear magnetic resonance spectroscopy (NMR), large particle accelerators and superconducting energy storage systems (SMES), magnetic confinement nuclear fusion devices (Tokamak) and other magnet winding. In order to ensure the safety of the magnet operation, the outer surface of the low-temperature superconducting wire needs to be coated with insulating material. The insulating material of the superconducting flat wire used in MRI is obtained by braiding. The commonly used braiding insulating materials are high-performance polyester filaments and glass fil...

Claims

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Application Information

Patent Timeline
24 Dec 2019
Publication
CN110608698A
IPC
G01B21/06; G01B11/04; G01F17/00
CPC
G01B11/043; G01B21/06; G01F17/00
Inventors
柳祥; 郭强