SU881555A1 - Gaseous media pressure pickup - Google Patents

Description

one

The invention relates to a technique for measuring pressure, and more specifically to sensors for measuring excess pressure of gaseous media with remote transmission of readings.

Devices are known for measuring pressure with remote transmission of readings in which mechanical deformations of the measuring part of the device are converted into an electrical signal DJ

The disadvantages of these pressure sensors include the complexity of the design, the presence of a mechanical pressure transducer, the need to power the sensor by electrical voltage. The output signal is of low power and transducers are introduced into the device to amplify it.

The purpose of the invention is to simplify the device of the pressure sensor and, the ability to directly convert the pressure differential to an electrical signal.

This goal is achieved by using a known vortex tube with a heat and energy separation chamber as a pressure sensor for gaseous media.

The drawing shows schematically a vortex thermoelectric tube.

Vortex thermoelectric tube contains snail nozzle inlet with

to a tangential nozzle 1, a diaphragm with an opening 2 for the exit of the cold flow and a chamber.3 of the heat and power separation with a throttle 4 for outputting and regulating the fuel noToKat

Claims (1)

s The walls of chamber 3 are made in the form of a thermoelectric battery 5, the hot junctions of which form the inner surface of the chamber and the cold ones form its outer surface. A thermoelectricity of the battery 5 is enclosed in a chill; a jacket 6 that has a diaphragm opening 2 through the nozzle 7. 3 To measure the vortex pressure, the thermoelectric pipe is connected via a snail nozzle input with a tangential nozzle 1 to an object in which pressure is measured. The pressure is measured as follows. The gaseous medium through the tangential nozzle 1 is introduced into the chamber. 3 where the energy separation of gas occurs in cold and hot streams. A cold stream of gas through the hole 2 of the diaphragm is discharged into the jacket 6., and the hot stream washes the hot thermopile junctions 5 and. The choke comes out 4. In this case, the hot flow gives off heat to the hot springs of the thermoelectric battery 5, and the cold flow in the shirt 6 cools the cold junctions of the thermopile 5, Due to the temperature difference between the cold and hot spas, the thermoelectric battery generates a constant electromotive force (EMF), which is removed from the poles of the thermoelectric battery 5. The value of the electromotive force generated by the thermoelectric battery 5 depends on the temperature difference between the cold and hot gas streams flowing from vortex tube. In turn, the temperature difference between cold and hot flows depends on the magnitude of the pressure of the gaseous medium flowing to the tangential nozzle 1. With increasing pressure, the temperature difference increases, and with decreasing -. decreases. For ease of use 4 the recording device is graduated in units of pressure. The use of a known vortex tube with a heat and power separation chamber as a pressure sensor for gaseous media has several advantages, since the sensor (unlike the known ones) is simple in design and operation, has small dimensions and costs, and has no which makes it reliable. It can be successfully used in various fields of technology for measuring and recording the pressure of gaseous media, for example, pressure measurement in gas mains, in compressed air receivers, steam in steam boilers, etc. Gas consumption through the sensor is negligible. The use of a vortex tube with a heat and energy separation chamber as a sensor for measuring pressure makes it easy to solve the problem of remote sensing of the pressure of gaseous media. Claims The use of a vortex tube with a heat and energy chamber, separation as a pressure sensor for gaseous media. Sources of information taken into account in the examination 1. G. Murin A. Thermal measurements. M., Energie, 1968, p. 270275.