Regulating valve for proportioning air and fuel gas

Abstract

The invention discloses a regulating valve for proportioning air and fuel gas. A valve body seat which is connected on a fuel gas pipeline is provided with two cavities, namely an upper cavity connected with a fuel gas inlet and a lower cavity connected with a fuel gas outlet, and the a valve sheet is arranged between the upper cavity and the lower cavity for opening and closing of the pass of thefuel gas; an airtight induction cavity is arranged in the middle of the valve body, a pulse diaphragm is arranged in the middle of the induction cavity for dividing the induction cavity into an upperinduction cavity and a lower induction cavity which are mutually insolated and excellently sealed, and a sealing diaphragm is arranged between the lower induction cavity and the upper cavity of the valve body seat; a connecting rod is arranged and fixedly connected on the valve sheet vertically, and is fixedly connected with the sealing diaphragm and the pulse diaphragm after vertically penetrating through the sealing diaphragm and the pulse diaphragm; and the top end of the connecting rod is fixedly connected with a tension spring, the top part of which is fixedly connected with a screw rodwhich is thread connected with the shell of the valve body.

Description

Technical field: [0001] The invention relates to a mechanical proportional regulating valve, in particular to an air and gas proportional regulating valve used in industrial combustion equipment and kiln heating systems. Background technique: [0002] For existing industrial combustion systems, most of the double butterfly valves are used to adjust the air / gas flow ratio, such as figure 1 As shown, for this combustion system, the butterfly valve 3 on the gas pipeline 2 and the butterfly valve 3 on the air pipeline need to be manually adjusted and controlled respectively, which is cumbersome to use, and the adjustment of the air and gas flow cannot be carried out synchronously. The adjustment response is slow, and the air / gas ratio adjustment cannot be quickly and effectively achieved. The work efficiency is low. At the same time, due to the inaccurate manual adjustment accuracy, the proportional adjustment cannot be performed, resulting in incomplete combustion of fuel and e...

AI Technical Summary

Problems solved by technology

[0002] For existing industrial combustion systems, most of the double butterfly valves are used to adjust the air / gas flow ratio, such as figure 1 As shown, for this kind of combustion system, the butterfly valve 3 on the gas pipeline 2 and the butterfly valve 3 on the air pipeline need to be manually adjusted and controlled separately, which is troublesome to use, and the air and gas flow adjustment cannot be performed simultaneously.

The adjustment response is slow, and the proportional adjustment of air / gas cannot be quickly and effectively achieved, and the work efficiency is low. At the same time, due to the inaccurate manual adjustment accuracy, it cannot be adjusted proportionally, resulting in incomplete combustion of fuel and energy waste.

And because of the low adjustment accuracy, the combustion atmosphere cannot be well controlled during combustion, and defective products are likely to be produced in the furnace chamber that requires an oxygen-deficient atmosphere.

Can not effectively prevent tempering during work, resulting in certain safety hazards

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