Multi-component fuel gas mixing system for pre-combustion heating type constant volume bomb

Abstract

The invention provides a multi-component fuel gas mixing system for a pre-combustion heating type constant volume bomb. The system comprises a gas exhaust system, a gas supply system, a gas exhaust system and a control system, wherein the gas supply system comprises a gas cylinder, a gas mixer and a constant volume bomb; a pressure sensor and a micro-pressure sensor are arranged on the gas mixer; and a flowmeter with connecting and disconnecting functions is arranged on an access of the gas cylinder and the gas mixer. According to the system, advanced stepwise mixing is adopted, automatically controlled operation is realized in the gas mixing process, various parameters can be set at any time through a data input device, and a gas mixing result can be analyzed by a gas component analyzer, so that the safety coefficient can be improved, gases can be mixed more uniformly, and the gas mixing component has higher precision.

Description

technical field [0001] The invention relates to a multi-component gas mixing system of a pre-combustion heating constant volume bomb, which belongs to the field of testing technology and the field of power devices. Background technique [0002] The constant volume bomb is a kind of airtight container commonly used in the field of power mechanical device testing, and the pre-combustion heating type constant volume bomb is a constant volume bomb that needs to be filled with premixed gas in the bomb body and ignited for heating. It is necessary to pre-mix the gas before ignition. Due to the controllability of the combustion conditions, it is necessary to precisely control the composition and pressure of the gas entering the pre-combustion heating constant volume bomb. The traditional gas mixing process directly puts the gas in the cylinder The gas is sprayed into the constant volume bomb, and the quantitative and mixing of the gas is carried out in the constant volume bomb, whi...

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Problems solved by technology

[0002] The constant volume bomb is a kind of airtight container commonly used in the field of power mechanical device testing, and the pre-combustion heating type constant volume bomb is a constant volume bomb that needs to be filled with premixed gas in the bomb body and ignited for heating. It is necessary to pre-mix the gas before ignition. Due to the controllability of the combustion conditions, it is necessary to precisely control the composition and pressure of the gas entering the pre-combustion heating constant volume bomb. The traditional gas mixing process directly puts the gas in the cylinder The gas is sprayed into the constant volume bomb, and the quantitative and mixing of the gas is carried out in the constant volume bomb, which is not only prone to danger and directly damages the bomb body, but also directly causes the change of the injection flow rate due to the constant change of the pressure difference during the injection process. , resulting in inaccurate final mixture results

In addition, this method also has many defects such as low control accuracy, insufficient gas mixing, and susceptibility to interference.

In particular, the traditional gas mixing method is prone to local accumulation of components that account for a small proportion in the mixed gas. Complex equipment such as stirring must be used to mix evenly, which increases system costs virtually and also puts pressure on the system. The sealing performance of the

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