SU1418585A1 - Elastic sensitive element - Google Patents

Abstract

The invention relates to instrumentation technology and allows / provides for the possibility of measuring the pressure difference. The sensing element consists of two identical single-turn manometric springs. The coils of the spring are opposed. The blind ends 5, 6 of the springs are displaced depending on the magnitude of the pressure difference in one direction or another. 2 Il.

Description

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: The invention relates to the control- I of the NS-measuring technique and can nai; These applications are used in instruments for measuring differential pressure.

The purpose of the invention is to make it possible to measure the differential pressure.

Fig. 1 shows a schematic of the elastic sensing element of Fig. 2 - it is possible to connect it when measuring the liquid level.

The elastic sensing element contains two identical single-turn manometric springs 1 and 2, equipped with fittings 3 and A for connection to pressure measuring lines, which must be rigidly fixed, for example, on the sensor body.

Manometric springs 1 and 2 are located in the same plane, and their turns are opposite, while the blind ends 5 and 6 of springs 1 and 2 are respectively interconnected by a hinge 7,

Elastic sensing element works as follows.

If the fluid (gas) flowing through the fittings 3 and 4 has the same pressure (P, P), then the forces F and F, acting on the blind ends of the springs 5 and 6, will balance out between themselves and the springs will remain stationary. When supplied through fittings 3 and 4, fluids with different pressures (P n P, forces F and F will not balance each other, and the hinge point of the tubular springs (point A) will shift depending on the pressure difference in one direction or the other.

In this case, an arrow connected to g, for example, through a transmission-multiplier mechanism to the hinge, will show the difference in pressure of the liquid (gas) J located in two magnets.

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Graduation gauge with a sensitive 5-shaped. The element can be made by supplying the same pressure to each of the single-turn tubular springs. With such a pressure gauge, it is possible to measure not only the pressure difference, but also the absolute pressure from the flow pressure (gas) in the line. To do this, the gauge must be equipped with an additional scale.

A pressure gauge with the proposed elastic sensor element also measures the level of the fluid under pressure. If one tubular spring 1 is connected by line B to the vapor space of vessel 9, and the second tubular spring 2 of the sensing element is connected by line 10 to the bottom of the vessel, then the manometer-level gage will show the pressure of the liquid column with height h and subtract the pressure of the vapor vapor vessel. By calibrating the instrument scale accordingly, it is possible to record the change in the liquid level.

The elastic sensing element can be made in the form of a solid S-shaped bent tube with an internal partition. The connection of single-turn tubular bars can also be rigid.

Claims (1)

Invention Formula An elastic sensing element containing two identical single-turn manometric tubular springs, the blind ends of which are interconnected, characterized in that, in order to make it possible to measure the pressure difference, there are tubular springs in the same plane and interconnected between themselves by means of a hinge , while the coils of the springs are located opposite. FIG. 2 Compiled by M.Zhukov Editor E.Papp Tehred L.Oliynyk Proofreader L.Patay Order 4146/40 Circulation 847 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Subscription