Liquid nitrogen container leak detection system and method

A liquid nitrogen and leak detection technology, which is applied in the direction of detecting the appearance of fluid at the leak point and using the liquid/vacuum degree for liquid tightness measurement, etc., to achieve the effect of low cost, good detection effect and good elegance

Active Publication Date: 2018-09-18
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the convenience, accuracy and reliability of its operation still need to be further improved.

Method used

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  • Liquid nitrogen container leak detection system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 , a liquid nitrogen container leak detection system, comprising a liquid nitrogen container body 1, a video camera 2 and an ultraviolet light source 3, the cavity of the liquid nitrogen container body 1 has liquid nitrogen with a composite fluorescent agent microporous material, so The composite fluorescent agent microporous material is uniformly suspended and dispersed in liquid nitrogen. The composite fluorescent agent microporous material is prepared by uniformly dispersing ultraviolet fluorescent agent particles in a microporous carrier. The pore diameter of the microporous carrier is 10-500 nm. The camera 2 and the ultraviolet light source 3 are distributed around the liquid nitrogen container body 1 .

[0037] The microporous carrier is a polyvinylidene fluoride microporous material, and the composite fluorescent agent microporous material is prepared by the following steps:

[0038] (1) Dibutyl phthalate and dodecanol are prepared as a mixed so...

Embodiment 2

[0045] refer to figure 1 , a liquid nitrogen container leak detection system, comprising a liquid nitrogen container body 1, a video camera 2 and an ultraviolet light source 3, the cavity of the liquid nitrogen container body 1 has liquid nitrogen with a composite fluorescent agent microporous material, so The composite fluorescent agent microporous material is uniformly suspended and dispersed in liquid nitrogen. The composite fluorescent agent microporous material is prepared by uniformly dispersing ultraviolet fluorescent agent particles in a microporous carrier. The camera 2 and the ultraviolet light source 3 are distributed in the liquid nitrogen Around the container body 1.

[0046] The microporous carrier is an activated carbon microporous material, and the composite fluorescent agent microporous material is prepared by the following steps:

[0047] (1) Activated carbon is homogeneously pulverized, and the particle size is controlled below 300 mesh;

[0048](2) Mix ac...

Embodiment 3

[0052] refer to figure 1 , a liquid nitrogen container leak detection system, comprising a liquid nitrogen container body 1, a video camera 2 and an ultraviolet light source 3, the cavity of the liquid nitrogen container body 1 has liquid nitrogen with a composite fluorescent agent microporous material, so The composite fluorescent agent microporous material is uniformly suspended and dispersed in liquid nitrogen. The composite fluorescent agent microporous material is prepared by uniformly dispersing ultraviolet fluorescent agent particles in a microporous carrier. The camera 2 and the ultraviolet light source 3 are distributed in the liquid nitrogen Around the container body 1.

[0053] The microporous carrier is a perlite microporous material, and the composite fluorescent agent microporous material is prepared by the following steps:

[0054] (1) Expanded perlite is homogeneously crushed, and the particle size is controlled below 300 mesh;

[0055] (2) Mix perlite with u...

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Abstract

The invention discloses a system and a method for leak detection of liquefied ammonia container. The leak detection system comprises a liquefied ammonia container body and UV light sources. The cavity of the liquefied ammonia container is filled with liquefied ammonia; composite fluorescent agent cellular materials are uniformly suspended and dispersed in the liquefied ammonia; the composite fluorescent agent cellular material is obtained through uniformly scattering the ultraviolet ray fluorescent agent particles in a micropore carrier, wherein the aperture of the micropore carrier is 10-500nm; the weight ratio between the fluorescent agent particles and the micropore carrier is 0.5-5:100; and the uv light sources are arranged on the circumference of the liquefied ammonia container body. The invention can detect whether leakage exists through the fluorescence effect, and is simple in operation, less in workload, safe and reliable, good in detection effect and low in the cost.

Description

technical field [0001] The invention relates to a leak detection system, in particular to a liquid nitrogen container leak detection system and method. Background technique [0002] Liquid nitrogen is liquid nitrogen, inert, colorless, odorless, non-corrosive, non-flammable, and extremely low temperature. A dedicated liquid nitrogen tank is required for storage. [0003] In industrial production, liquid nitrogen is obtained by fractional distillation of compressed liquid air, which can be used as a deep refrigerant. Due to its chemical inertness, it can directly contact biological tissues and freeze immediately without destroying biological activity, so it can be used for: ( 1) Quickly freeze and transport food, or make ice products; (2) conduct research on low-temperature physics; (3) demonstrate low-temperature states in science education; (4) provide the temperature required for high-temperature superconductors to display superconductivity, such as Yttrium barium copper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/20
Inventor 林丽莉王宝根何倩倩
Owner ZHEJIANG GONGSHANG UNIVERSITY
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