SU1522166A1 - Device for controlling gas consumption - Google Patents

Abstract

The invention relates to gas systems that perform the functions of preparing, distributing, controlling and transporting gases and gas mixtures, in particular, to devices for controlling the flow rate of the gaseous component in supply systems. The aim of the invention is to improve the accuracy. The device contains a source of gas 1, a supply valve 2, a pressure regulator in the form of a reducer 3, a throttle 4, a sleeve 5 and an insert 6., 2 Il.

Description

The invention relates to gas systems, performs the functions of preparing, distributing, controlling and transporting gases and gas mixtures, in particular, to devices for controlling the flow rate of the gaseous component in supply systems.

The aim of the invention is to improve the accuracy of the regulator by tracking the surface area of the change in temperature of the gas stream.

Figure 1 shows a graph of changes in xenon consumption; FIG. 2 is a general diagram of the proposed device and a choke device, section

The device contains a source of gas in the form of a high-pressure cylinder 1, a valve, 2 inlets, a pressure regulator in the form of a reducer 3, and a throttle 4. The throttle contains a sleeve 5 and an insert 6-. As the material of the sleeve can be used copper alloy Ml or | M2. Stainless steel or quartz glass can be used as the material of the nozzle.

The device works as follows.

When the valve 2 is removed, gas from cylinder 1 enters the reducer 3 and into the throttling device A. In this case, due to the large flow rate, the temperature changes significantly (in this case decreases), the flow area of the annular gap changes depending on the temperature change. formed by the sleeve 5 and the insert 6. Moreover, with a thin-walled sleeve made, for example, of copper and with a ratio of wall thickness

to the inner diameter O, 1-0.05, the area of the annular gap changes almost instantaneously depending on the change in temperature.

When testing devices in which the liner is made with a ratio of wall thickness to the inner diameter of more than 0.1 or

ratios ----- less than 20 (,, - ats g n

coefficients of thermal diffusivity of liner and insert materials), the flow rate varies practically. curve F const (figure 1). When the ratio of the wall thickness to the internal diameter less than 0.05, the material is crushed and the consumption characteristics are disturbed,

Formula inventions

A device for controlling the gas flow, containing a pressure regulator and a choke, successively installed on a gas main, characterized in that, in order to increase the accuracy of the regulator by tracking the flow area of the gas flow temperature, the choke is made in the form of a liner with a wall thickness ratio of the sleeve and its internal diameter 0.05-0.10 and the insert in the form of a body of rotation of a convex shape installed coaxially in it with the ratio of the thermal diffusivity of the material of the sleeve a , f and

inserts a

and

aL 20, en

223 7S3 283 303 5Л / Г FIG. one

Claims (1)

Claim A device for regulating the gas flow rate, comprising a pressure regulator and a throttle sequentially mounted on the gas line, characterized in that, in order to increase the accuracy of the regulator by monitoring the passage area of the gas flow temperature, the throttle is made in the form of a sleeve with a ratio of the thickness of the sleeve wall and its inner diameter 0.05-0.10 and an insert coaxially mounted in it in the form of a convex-shaped body of revolution with a ratio of thermal diffusivity coefficients of the sleeve materials a $ and rates a _{and a}