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Method for testing critical energy of detonation formed by direct initiation

A technology of critical energy and test method, applied in the direction of material explosiveness, etc., can solve the problem of test system without direct detonation critical energy, and achieve the effect of reducing the harm of life safety and property loss, easy operation and low cost.

Inactive Publication Date: 2012-07-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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Problems solved by technology

Although the existing technology is relatively mature for the measurement of the explosive characteristics and explosion limits of combustible gases, there is no test system for direct detonation critical energy.

Method used

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  • Method for testing critical energy of detonation formed by direct initiation
  • Method for testing critical energy of detonation formed by direct initiation
  • Method for testing critical energy of detonation formed by direct initiation

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Embodiment Construction

[0020] See attached figure 1 , 2, a kind of critical energy test method that direct detonation forms detonation, it uses a kind of critical energy test system that direct detonation forms detonation, and the critical energy test system that described direct detonation forms detonation comprises: initiation device 1, oscilloscope and ignition circuit;

[0021] The detonating device 1 is a spherical container with an internal diameter of 200 mm, a wall thickness of 50 mm, and a maximum pressure of 100 MPa. An ignition rod 2 is arranged on the top thereof, and the cross section of the ignition head of the ignition rod 2 is a circle with a radius of 3.5 mm. The positive pole is located at the center of the circle, and a layer of insulating ceramics is wrapped between the negative pole and the positive pole; a heating belt 3 is provided at the bottom, and a control panel 4 is connected to one side of the control panel 4. One end of the control panel 4 is provided with the detonatin...

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Abstract

The invention belongs to the technical field of inflammable gas accident prevention, and particularly relates to inflammable gas testing methods. The technical scheme includes that a system for testing critical energy of detonation formed by direct initiation comprises an initiation device (1), an oscilloscope and an ignition circuit, wherein the oscilloscope is connected with output of a pressure sensor (5) of the initiation device, and the ignition circuit is connected to the initiation device (1) through a triggering switch. The initiation device is applicable to measurement of initial pressure ranging from 1kPa to 20atm so as to be wide in testing pressure range, and is applicable to measurement of the critical energy formed by direct initiation of mixed gases of all gaseous fuel and oxygen or air. Detonation sensitiveness of various substances can be judged by measuring the critical energy of detonation formed by direct initiation of various inflammable mixed gases, so that a dangerous source can be controlled, and damage of detonation to life safety and property loss is avoided or reduced. The system is simple in structure, low in cost, easy in operation and accurate in measurement result.

Description

technical field [0001] The invention belongs to the technical field of combustible gas accident prevention, in particular to a test method for combustible gas. Background technique [0002] A large amount of flammable and explosive gases are inevitably involved in the modern industrial production process. Once the flammable substances are mixed with air and reach a certain concentration range, combustion, explosion, and even more destructive detonation can occur under the action of a certain ignition energy. , causing property damage and casualties in a large range. Through the measurement of the critical energy directly forming the detonation, the risk assessment ability of the detonation hazard of the flammable mixture gas can be improved, so as to effectively avoid or reduce the harm of the detonation to personnel and property. In 1993, Zhang Jinglin invented and designed a test device for the explosion characteristics of combustible gases, which can test the explosion l...

Claims

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Application Information

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IPC IPC(8): G01N25/54
Inventor 张博白春华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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