Medical ion-chamber cable

An ionization chamber and cable technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problem that the ionization chamber cannot fully meet the requirements of measuring the dose of brachytherapy, and achieve strong toughness, reinforced insulation, and good dielectric properties. Effect

Inactive Publication Date: 2009-03-04
高思义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outer conductor shielding of the existing shielded cables usually has a shielding layer made of braided copper wires, or is composed of an integral copper tube, which cannot fully meet the requirements of ionization chambers for measuring brachytherapy doses in actual use.

Method used

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Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 , figure 2 As shown, the present invention is a medical ionization chamber cable, which includes an inner conductor. Its special feature is that a copper-plated silver-plated steel wire with an outer diameter of 0.28 mm is used as the inner conductor 1. Sequentially covered: an insulating layer 2 in the shape of a round tube made of PTFE material with an outer diameter of 0.9mm; a graphite coating 3 with a thickness of 0.03mm; a silver-plated copper wire woven mesh with a thickness of 0.07mm The first electric field electromagnetic interference shielding layer 4 formed in the shape of a circular tube, wherein the diameter of each silver-plated copper wire is: 0.07mm, the braiding density is: 95%; the thickness of the PVC inner sheath 5 is 0.25mm; Thickness: 0.035mm polyester tape 6; thickness: 0.092mm silver-plated copper wire braided circular tube-shaped second electric field electromagnetic interference shielding layer 7, wherein the diameter of each sil...

Embodiment 2

[0028] Such as figure 1 , figure 2 As shown, the present invention is a medical ionization chamber cable, including an inner conductor, and its special feature is that a copper-plated silver-plated steel wire with an outer diameter of 0.32 mm is used as the inner conductor 1, and the outer periphery of the inner conductor 1 extends from the inside to the outside. Sequentially covered: Insulation layer 2 in the shape of a round tube made of PTFE material with an outer diameter of 1.02mm; graphite coating 3 with a thickness of 0.04mm; a silver-plated copper wire woven mesh with a thickness of 0.086mm The first electric field electromagnetic interference shielding layer 4 is formed in the shape of a circular tube, in which the diameter of each silver-plated copper wire is: 0.086mm, the braiding density is: 99%; the thickness of the polyvinyl chloride inner protective layer 5 is 0.35mm; Thickness: 0.045mm polyester tape 6; thickness: 0.12mm silver-plated copper wire braided circular ...

Embodiment 3

[0030] Such as figure 1 , figure 2 As shown, the present invention is a medical ionization chamber cable, which includes an inner conductor. Its special feature is that a copper-plated silver-plated steel wire with an outer diameter of 0.28 mm is used as the inner conductor 1. Sequentially covered: an insulating layer 2 in the shape of a round tube made of polytetrafluoroethylene with an outer diameter of 1.0mm; a graphite coating 3 with a thickness of 0.03mm; a silver-plated copper wire woven mesh with a thickness of 0.08mm The first electric field electromagnetic interference shielding layer 4 formed in the shape of a circular tube, wherein the diameter of each silver-plated copper wire is: 0.08mm, the braiding density is: 99%; the thickness of the PVC inner sheath 5 is 0.25mm; Thickness: 0.04mm polyester tape 6; thickness: 0.10mm silver-plated copper wire braided circular tube-shaped second electric field electromagnetic interference shielding layer 7, wherein the diameter of ...

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Abstract

This invention relates to a kind of medical ion chamber cable, ento-ectad including a inner conductor, a high megohm resistance insulating layer, a plumbago layer, the first shielding layer preventing electromagnetic field interfering, a PVC inner protective layer, a polyester layer, the second shielding layer preventing electromagnetic field interfering, an outer protective layer preventing fire. The feature of the inner conductor is that it is made up of a nickel-copper silvering wire. The advantage of the invention is that the high-density, optimized and multi-layer shielding structure not only prevents electromagnetic field interfering effectively, but improves the effect of the medical ion chamber measuring low-activity radial source in the short range.

Description

Technical field [0001] The invention relates to a transmission cable, in particular to a double-layer high-shielding cable for a medical ionization chamber. Background technique [0002] In the ionization chamber measurement, especially the well-type ionization chamber measurement, the particle source signal generated by ionizing radiation is weak. In order to detect the signal of these weak, low-activity radioactive sources, the connection cable between the instruments in the ionization chamber measurement is required. Excellent anti-interference ability to achieve the best shielding effect. The outer conductor shield of the existing shielded cable usually has a shielding layer woven of copper wires, or is composed of a whole copper tube, which cannot fully meet the requirements of the ionization chamber to measure the brachytherapy dose in actual use. Summary of the invention [0003] The purpose of the present invention is to overcome the defects and deficiencies in the prior...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/02H01B7/17H01B3/44H01B11/06
Inventor 高思义
Owner 高思义
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