A Precisely Adjustable Gas Flow Nozzle

Abstract

The invention provides a precise and adjustable gas flow spray pipe and relates to the field of air flow adjustment. The precise and adjustable gas flow spray pipe comprises an equipment shell, an upper end cover, a first installation support, a front adjustment sealing plate, a sealing pad, a spray nozzle adjustment mechanism and a pressing and sealing mechanism. The upper end cover is fixedly installed on the outer edge of a ladder-shaped groove of the equipment shell; the spray nozzle adjustment mechanism is fixedly installed in the middle of the top of the upper end cover; the pressing and sealing mechanism is fixedly installed at one end of the top of the upper end cover; the end, close to the pressing and sealing mechanism, of the bottom of the ladder-shaped groove of the equipment shell, and the top end is fixedly provided with the sealing pad; and one end of the bottom of the ladder-shaped groove of the equipment shell is provided with the first installation support. By means of the precise and adjustable gas flow spray pipe, the problem of precise control over gas flow is solved, a high-precision flow adjustable spray pipe meets the requirement for precise adjustment on wide-range gas flow and flow velocity, the problem that a pore plate, a Venturi spray nozzle and other flow adjustment devices can only correspond to one flow parameter under the situation that the pressure is unchanged is solved, and a novel device is provided for pipe gas flow adjustment.

Description

technical field [0001] The invention relates to the field of air flow regulation, in particular to a precisely adjustable gas flow nozzle. Background technique [0002] At present, the commonly used air flow adjustment schemes can be divided into two categories: one is direct adjustment, and the other is throttling adjustment. [0003] Direct adjustment generally uses a flow control valve to directly use the flow meter acquisition signal as a feedback signal, generate a control signal through an intelligent PID control algorithm, and drive the control valve to perform flow adjustment. This method has a relatively simple system structure, but is limited by the accuracy of the existing gas flow meter and the valve Influenced by the size of front and rear airflow disturbances, the accuracy deviation is more than 5%, and the flow control accuracy is not high. [0004] The other is the throttling method, which is a multi-pipe group with a pressure reducing valve and a throttle o...

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Problems solved by technology

[0003] Direct adjustment generally uses a flow control valve to directly use the flow meter acquisition signal as a feedback signal, generate a control signal through an intelligent PID control algorithm, and drive the control valve to perform flow adjustment. This method has a relatively simple system structure, but is limited by the accuracy of the existing gas flow meter and the valve Influenced by the size of front and rear airflow disturbances, the accuracy deviation is more than 5%, and the flow control accuracy is not high

[0004] The other is the throttling method, which is a multi-pipe group with a pressure reducing valve and a throttle orifice. According to the combination of pipelines, the pressure reducing valve reduces the pressure of the gas source to the required pressure. , to precisely control the air flow, the control system of this method is relatively simple, and the air flow control accuracy is high, but the equipment structure is relatively complicated, the working conditions that can adjust the flow are limited, and it is impossible to adjust the air flow in a large range

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