SU491831A1 - Device for measuring the flow of gas-saturated liquid - Google Patents

Description

one

The invention relates to a measurement technique and can be used, in particular, to measure the amount of liquid in a mixed gas-liquid product stream.

A device for measuring the flow rate of a gas-saturated liquid, comprising a housing, with inlet and outlet pipes installed in its upper and lower parts, a partition, outflow openings, flow transducers and secondary devices, is known.

However, such devices do not provide the required measurement accuracy in the transition zone from one measurement range to another, and also require sophisticated secondary equipment for switching the measurement range, which makes it difficult to automate the measurement process.

To improve the measurement accuracy and simplify the design of the proposed device, the housing is divided into upper and lower parts by a partition equipped with at least two branch pipes with outflow openings installed at different levels, and a gas overflow branch pipe, with this:, 1 flow transducers installed in the lower part of the housing under the outflow openings and connected to secondary devices, and a float valve is installed in the lower outflow outlet.

The drawing shows a diagram of the proposed device.

The device comprises a housing 1, divided by a partition 2 into upper and lower parts, branch pipes 3 and 4 with openings installed in the partition 2, and flow transducers of the first 5 and second 6 ranges, placed respectively under the openings of branch pipes 3 and 4, secondary devices 7 , inlet 8 and outlet 9 inlets, inlet 10 for the flow of gas from the upper part of the body to the lower, an adder 11 and a float valve 12 installed above the opening in the inlet n.

The hole in the pipe 4 is made at a higher level than the hole in the pipe 3.

The device works as follows.

The gas-liquid mixture enters through the connecting pipe 8 to the upper part of housing I, where it is separated.

The gas phase through the pipe 10 flows into the lower part of the housing, and the liquid phase spreads over the surface of the partition 2 and through the opening in the pipe 3 expires into the transducer 5 of the first measuring range and then flows through the outlet pipe 9 into the external network.

If the liquid level above the septum S is negligible, then the float of the valve 12 is in the lower position, i.e.

the pipe 3 is open and all liquid from the upper part of the housing 1 flows through it into the converter 5 of the first range.

When the flow rate increases, the hole in the nozzle 3 does not have time to miss the entire flow, and in this case the liquid level above the partition 2 increases.

If the liquid level rises to the level of the hole in the pipe 4, the liquid begins to flow and through this pipe into the second range flow transducer 6, i.e., two flow transducers 6 and 5 are measured simultaneously.

Normal operation of the first range flow transducer 5 with a significant increase in flow rate is provided by the float valve 12, which regulates the amount of liquid flow through the opening in the nozzle 3 by changing its passage (shutting it off).

When both converters 5 and 6 of the flow rate are simultaneously operated, signals from them coming through the secondary devices 7 are summed by adder 11, which gives information about the value of the total flow.

If you need to expand the measurement, you can set the number of nozzles with holes and flow transducers more than two.

Formula of invention

A device for measuring the flow rate of a gas-saturated liquid, containing a corps with inlet and outlet pipes installed in its upper and lower parts, a septum, outflow holes, flow transducers and secondary devices, respectively, in order to improve measurement accuracy and simplifying the construction, in it the casing is divided into upper and lower parts with a non-enclosure equipped with at least two branch pipes with outflow openings installed at different levels and a gas overflow branch pipe with In this case, the flow transducers are installed in the lower part of the housing under the outflow openings and connected to the secondary devices, and a float valve is installed in the lower outflow opening.