SU1719902A1 - Steam flow meter - Google Patents

Abstract

The invention relates to a measurement technique and can be used in the energy and chemical industries. The purpose of the invention is to improve the accuracy of measuring steam consumption and simplify the operation of the device. As excess condensate accumulates in the tank 3, its excess is poured into the inner tank 7 and at some point the float 9 pops up, and the stop valve 10 releases the inlet end of the additional pipeline 8 and the excess condensate is removed to a cavity of lower pressure. As a result, a mode of operation is established when the lifting height of the locking member 10 is such that the amount of condensate leaving through pipeline 8 corresponds to its profit from tank 3 to tank 7, and such resistance to condensate flow is established in the annular gap between the locking member 10 and the end of pipeline 8 , which is the largest measured pressure drop across the diaphragm 1.2 il. (L C

Description

The invention relates to a measurement technique, and more specifically to the measurement of the flow rate of condensing media, and can be used in the power engineering and chemical industries.

A device for measuring steam flow rate is known, which contains a restriction device (diaphragm) installed in the supply line (pipeline) and a differential pressure gauge connected through compensation vessels to cavities of higher and lower pressure of the restriction device. This device is closest to the one proposed.

A disadvantage of this device is that when working with condensing media (vapors of various substances) due to the continuous removal of excess

condensate from the compensation vessel to the cavity of greater pressure (in front of the diaphragm); condensate flows directly into the restriction device. This reduces the accuracy of steam flow measurement, since a non-phase medium passes through the diaphragm, and condensate accumulates in the pipeline in front of the restriction device.

The purpose of the invention is to improve the accuracy of measuring steam consumption and simplify the operation of devices.

This goal is achieved by the fact that a device for measuring steam consumption, containing a restriction device installed in the supply line and a differential pressure gauge connected to cavities of higher and lower pressure and

ABOUT

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.performed in the form of two tanks placed one in another and a measuring element, provided with a body with positive buoyancy, a shut-off member and an additional pipeline. At the same time, a positive buoyancy body is installed in the cavity of the internal tank of the differential pressure gauge, and the locking member is fixed on this body and placed in the inlet end of an additional pipeline with the possibility of movement. The cavity of the inner reservoir is connected to a cavity of lower pressure of the restriction device.

FIG. 1 and 2 is a diagram of the proposed device.

The device contains a narrowing device. Solventure (diaphragm) 1. installed in pipe 2, to which external reservoir 3 (from the higher pressure side) is connected to the steam cavity through pipe 4, and through the liquid cavity through pipe 5 through the measuring element (tube) 6 with a cavity of lower pressure. The internal tank 7 of the pressure gauge is connected via a pipe 8 to a cavity of lower pressure of the restriction device 1. In tank 7, a body 9 is installed with positive buoyancy (a float) to which a shut-off member 10 located at the inlet end of the pipeline 8 is movably attached.

The device works as follows

At the initial moment of flow measurement, when there is no condensate in tank 7, float 9 and shut-off member 10 are in the lower position and the internal cavity of tank 7 is disconnected from the cavity of lower pressure of restriction device 1. As excess condensate accumulates in tank 3, its excess overflows in the inner tank 7 (shown by arrows) and, starting from a certain moment, the float 9 pops up

to a certain height. In this case, the locking member 10 releases the inlet end of the pipeline 8 and the excess condensate is removed to the cavity of lower pressure.

this pipeline (shown by arrows). As a result, a mode of operation is established when the lifting height of the locking member 10 is such that the amount of condensate leaving through the duct 8 corresponds to its profit from tank 3 to tank 7, and in the annular gap between the locking member 10 and the end of the pipeline 8 is also established resistance to flow of condensate, which is the largest

equal to the measured pressure drop across the diaphragm 1. If, for any reason, in the tank 7 the level of condensate decreases until it disappears completely, the float 9 drops and the shut-off member 10

completely closes the entrance of the pipeline 8, which also eliminates pressure equalization before and after the restricting device and ensures the required device performance and measurement accuracy. By measuring the pressure drop across the constriction device, the steam consumption is determined by known methods.

Claims (1)

The invention The device for measuring steam flow, containing a tapering device and a differential pressure gauge installed in the supply line, is required so that, in order to improve the accuracy of measuring steam flow and simplify the operation of the device, it is provided with a body positive buoyancy, a shut-off member and an additional pipeline, with a positive-buoyant body installed in the cavity of the differential pressure gauge’s inner tank, the shut-off member is fixed on this body and placed in the inlet face an additional pipeline is movable, and an additional pipeline connects the cavity of the internal reservoir of the differential pressure gauge with a cavity. v FIG. 2