Turnbuckle type edge leakage proof hydrogen sensor outer housing structure

A hydrogen sensor and anti-side leakage technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of high cost, complex structure, loose fixation and easy leakage, etc., achieve low cost, good mechanical properties, and eliminate the need for sealing circle effect

Inactive Publication Date: 2011-10-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the housing structure of the fuel cell gas sensor is not fixed and easy to leak or has a complex structure and high cost.

Method used

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  • Turnbuckle type edge leakage proof hydrogen sensor outer housing structure
  • Turnbuckle type edge leakage proof hydrogen sensor outer housing structure
  • Turnbuckle type edge leakage proof hydrogen sensor outer housing structure

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Refer to attached Figure 5 , Assemble the screw-type hydrogen sensor shell and the membrane electrode to form a hydrogen sensor, wherein the membrane electrode uses Nafion 112 membrane as the electrolyte membrane, uses Pt / C (mass fraction is 40%) as the catalyst, and the cathode and anode Pt loads are 1.2mg respectively / cm 2 , 1.0mg / cm 2 . according to figure 1 The test system shown in the test is tested. Arrow 1 is the mixed gas containing hydrogen at the anode end, and arrow 2 is the fuel gas air at the cathode end. A DC digital voltmeter is used to detect the current between the anode wire and the cathode wire, and the voltage value corresponds to the measured mixed gas. the hydrogen concentration.

example 2

[0025] Refer to attached Figure 5 , Assemble the shell of the screw-type anti-side leakage hydrogen sensor and the membrane electrode to form a hydrogen sensor, and the membrane electrode is the same as in Example 1. Arrow 1 in the figure is the mixed gas containing hydrogen at the anode end, and arrow 2 is the fuel gas oxygen at the cathode end. A DC digital ammeter is used to detect the current between the anode lead and the cathode lead. The current value corresponds to the hydrogen concentration in the measured mixed gas.

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PUM

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Abstract

The invention discloses a turnbuckle type anti-side leakage hydrogen sensor outer shell structure which belongs to the air sensor field. The outer shell of the invention uses the turnbuckle type structure. The outer shell of the sensor and a flow combine plate are separately designed. The sandwich structure of a membrane electrode of two flow combine plates is positioned in the concave groove of the anode end of the outer shell, the cathode end of the outer shell is screwed in the concave groove of the anode end to close the shell body of the outer shell, and the flow combine plates and the membrane electrode are correspondingly clamped tightly. The structure of the sensor is screwed tightly and closed with each point stressed evenly, prevents the membrane electrode from being damaged andreduces contact resistance; furthermore the structure effectively prevents the tested air from side leaking without using two side sealing rings of the membrane electrode, simplifies the structure ofthe sensor, reduces production cost and improves the test precision. Moreover, the different materials of the outer shell and the flow combine plate can avoid a short circuit and the use of an independent flow combine plate facilitates the maintenance and replacement of components.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a novel side leakage-proof, short-circuit-proof and easy-to-maintain housing structure for a fuel cell gas sensor. Background technique [0002] The electrochemical hydrogen sensor is a measuring device that converts the electrocatalytic reaction of the component hydrogen to be measured on the electrode into an electrical signal, so as to obtain the hydrogen content according to the strength of the electrical signal. The working principle of the device is the working principle of the fuel cell. Its internal core component is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). Conductive materials such as carbon paper have evenly dispersed catalysts that initiate electrochemical reactions. Usually, the proton exchange membrane and the carbon paper sandwiched on both sides are hot-pressed to form a membrane electrode. [0003] In fuel cell sensors the an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01N27/26
Inventor 王智瑛白洋乔利杰
Owner UNIV OF SCI & TECH BEIJING
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