RU2666179C1 - Mass chamber liquid counter - Google Patents

Abstract

FIELD: measuring equipment.SUBSTANCE: invention relates to the field of measurement technology and can be used for mass and mass flow measurements of the liquid phase of a gas-liquid mixture. Mass chamber liquid meter consists of a primary and a secondary converter. Primary converter consists of a housing with inlet and outlet nozzles. Measuring unit is installed in the body, which contains a cover and a rear support, connected by rods. Between the lid and the rear support, a measuring chamber is installed with the possibility of turning it. Measuring chamber contains two open cavities and side plates on which counter loads are fixed. Angle of rotation of the measuring chamber is limited by shock absorbers. On the cover there is a pulse sensor connected to the secondary converter. Inside the body, after the inlet nozzle, a nozzle is installed. Two magnets are fixed on the cavities of the measuring chamber, each of which can interact with the pulse sensor only in the extreme positions of the measuring chamber. Pulse sensor can generate signals that differ from each other, depending on which of the magnets it interacts with. If the complete rotation of the measuring chamber does not take place, and one of the magnets acts on the pulse sensor more than once, then the mass converter does not produce the mass calculation.EFFECT: decrease in the error in measuring the mass of liquid by a chamber counter.1 cl, 2 dwg

Description

The invention relates to the field of measuring equipment and can be used to measure the mass and mass flow rate of the liquid phase in the composition of the gas-liquid mixture, for example oil in the oil and gas mixture.

The tipping gravimetric fuel oil meter of the Kirmalov design, described in the reference book of the Kremlin P.P., is known from the prior art. "Flowmeters and counters of the amount of substances" (first book). The well-known counter is a cylindrical body, covered with thermal insulation, equipped with a hatch for inspection and closed with a lid. Inside the housing there are two prismatic buckets having a section in the form of isosceles triangles. The measured medium enters through the inlet pipe into the distribution chute, and from it into one of the buckets. After operation, the measured medium is poured from the bucket into the outlet pipe. A counterweight is attached to the buckets. In the known counter, a counting mechanism is provided, as well as a liquid level regulator, consisting of a float, a system of levers and a valve on the inlet pipe.

A known counter of the amount of liquid - crude oil described in the patent of the Russian Federation No. 154443 (G01F 3/28, published on 08.27.2015). A well-known counter consists of a housing, a measuring unit, input and output collectors, a separation unit. The meter body is a horizontally located cylindrical vessel, on the shell of which, perpendicular to the axis, two coaxial openings are made for the inlet / outlet of the oil and gas mixture by means of hermetically connected inlet and outlet manifolds, and an adjustable inlet device is installed at the inlet. The cover of the measuring unit is attached to the housing through the flange, and a rubber gasket is used to impart a tight connection. Three threaded holes are made on the inner end of the lid, into which studs are installed, which serve to fasten the support, in addition, shock absorbers are installed on these axes, the movement of which is limited by the washer and cotter pin. There are coaxial holes with bearings at the end of the cover and support and the axis of the measuring unit is installed in them. The measuring unit is a movable system and consists of two prismatic buckets of triangular section and side plates to which the load is attached. Two permanent magnets are installed on one of the plates, and on the outer end of the cover of the measuring unit there are holes for mounting electromagnetic sensors, a density sensor, handles and level, and holes for mounting electromagnetic sensors are made in such a way that their center coincides with the path of the permanent magnets of the camera measuring. The separation unit contains two ejectors mounted on the inlet and outlet manifolds. Along with this, the well-known meter includes oil and gas and gas manifolds connecting the ejectors and the housing together, as well as a damper installed in the housing, which is a perforated sheet, and a funnel.

Known counter mass flow and mass of viscous liquids described in the patent of the Russian Federation No. 163766 (G01F 3/28, published 08/10/2016). A well-known counter consists of a housing, a measuring unit, input and output collectors. The housing is a horizontally located cylindrical vessel, on the shell of which, perpendicular to the axis, two coaxial openings are made for viscous fluid inlet / outlet by means of hermetically connected inlet and outlet manifolds, and a flow shape modeling device is installed at the inlet. A cover of the measuring unit is attached to the housing through a flange with sealing the connection using a rubber gasket, and on the inner end of the cover there are three threaded holes in which studs are installed that serve as axles for attaching the support and installing shock absorbers on them, the movement of which is limited by the washer and cotter pin. There are coaxial holes with bearings at the end of the cover and support and the axis of the measuring unit is installed in them. The measuring unit is a movable system and consists of two triangular prismatic buckets and side plates to which weights are attached, while the measuring unit is equipped with at least one permanent magnet. On the outer end of the cover of the measuring unit, holes are made for attaching at least one electromagnetic sensor associated with the calculator, pens and level, and the hole for mounting the electromagnetic sensor is made in such a way that its center coincides with the path of the permanent magnet of the measuring unit. The known counter comprises an electric heating device, consisting of an electric heating cable fixed on the outer surface of the housing, located in a heat-insulating casing with a heat-insulating cover, in which an explosion-proof terminal box is fixed for supplying power to this cable. The space between the cable, the cover and the casing is filled with a heat-insulating volumetric filler. The permanent magnet in the measuring unit is mounted on the lower plane in the middle between the prismatic buckets. The electromagnetic sensor contains an additional electronic corrector board, which is a programmable device, additionally placed in an explosion-proof housing. The output manifold is made in the form of a straight section of the pipe.

A known fluid meter described in the patent of the Russian Federation No. 129220 (G01F 1/05, published on 06/20/2013). The known counter comprises a hollow body in which a measuring unit is located, including a pulse sensor, and the cover and back support interconnected by pins. Between the cover and the back support, a measuring chamber is installed with limited rotation, containing two cavities open from above (in the previous analogues - buckets) and a magnet located so that in one of the positions of the measuring chamber the pulse sensor is located in the zone of its action. The known liquid meter further comprises a sensor of optical permeability of the medium.

The closest to the claimed technical solution for the combination of essential features is a liquid quantity meter manufactured by NPO NTES LLC, described on the official electronic website nponts.ru/products/counters/schetchik-zhidkosti-skzh/ (certificate RU. P. 29.065. A No. 50957 on the approval of the type of measuring instruments from 06/11/13). The known liquid quantity meter consists of primary and secondary converters. The primary transducer consists of a horizontally arranged cylindrical body with inlet and outlet nozzles. A measuring unit is installed inside the housing, comprising a cover and a back support, which in turn are interconnected by two upper and one lower rods. Between the lid and the back support there is a measuring chamber with the possibility of its rotation, containing two cavities open from above (in the above-described analogs - buckets), formed by flat sidewalls and bottoms, as well as side plates. Counterweights are fixed on the side plates. The rotation angle of the measuring chamber is limited by shock absorbers mounted on the upper rods. A pulse sensor is located on the lid, which can interact with a magnet mounted on the lower part of the measuring chamber so that in one of the positions of the measuring chamber the pulse sensor is located in the zone of its action. The pulse sensor is connected to the secondary converter. Inside the body after the inlet nozzle, a nozzle is installed.

The disadvantage of all the described analogues is the presence of such a possible state of the measuring chamber under certain measurement conditions, characterized by partial flooding of the housing, in which it occupies an intermediate position between the two extreme positions, held by the fluid flow. In this case, the magnet (magnets) is constantly located (are) in the sensitivity zone of the pulse sensor (s). Due to slight fluctuations of the measuring chamber, a series of pulses arrives at the secondary transducer, leading to the measurement of additional non-existent mass of liquid, but the process of complete mass gain in the cavities of the measuring chamber and, accordingly, its discharge does not occur.

The objective of the proposed technical solution is to reduce the error in measuring the mass of liquid by a chamber counter.

The problem is solved as follows.

The measuring chamber contains two magnets mounted on its cavities. During the operation of the mass chamber liquid counter, each of the two magnets is located in the sensitivity zone of one pulse sensor only in the extreme positions of the measuring chamber. The pulse sensor has the ability to generate different signals depending on which of the two magnets it interacts with (novelty). One of the magnets, for example, can be turned to the pulse sensor by the south pole, and the other by the north.

The claimed technical solution is illustrated by the figures:

FIG. 1 is a diagram of a mass chamber fluid meter;

FIG. 2 is a diagram of a primary converter.

A mass chamber fluid meter consists of a primary 1 and a secondary 2 transducers. The primary Converter 1 contains a horizontally arranged cylindrical housing 4 with input 5 and output 6 nozzles. A measuring unit 7 is installed in the housing 4, comprising a cover 8 and a back support 9, interconnected by two upper 10 and one lower 11 rods. Between lid 8 and the rear support 9 of the measuring unit 7 measuring chamber 12 is installed with the possibility of rotation, comprising two open-top cavity 13 and the side plates 14. The side plates 14 are fixed counterweight 15. Rotation angle φ _PIW measuring chamber 12 is limited shock absorbers 16, mounted on the upper rods 10. Inside the housing 4, after the inlet 5, a nozzle 18. is installed. On the cover 8 of the measuring unit 7 there is a pulse sensor 3 connected to the secondary transducer 2. On the cavities 13 of the measuring chamber 12 magnets 17 are fixed so that each of them has the ability to interact with the pulse sensor 3 only in the extreme positions of the measuring chamber 12. The pulse sensor 3 has the ability to generate different signals depending on which of the two magnets 17 it interacts.

A mass chamber fluid meter measures the mass of a liquid as follows.

The measured liquid enters from the inlet pipe 5 through the nozzle 18 into one of the cavities of the measuring chamber 12. At the moment when the position of the measuring chamber 12 is balanced by the counterweights 15, the measuring chamber 12 is rotated, the filled cavity is emptied, and an adjacent cavity is installed under the filling. The impact of the rotating measuring chamber 12 is mitigated by shock absorbers 16. The drained liquid flows into the lower part of the housing 4 and then into the outlet pipe 6. After rotation in the sensitivity zone of the pulse sensor 3, the magnets change 17. The mass and mass flow are calculated by the secondary transducer 2 according to the periods between different signals from the pulse sensor. In the event that a complete rotation of the measuring chamber 12 from one extreme position to another does not occur for any reason, and one of the magnets 17, due to slight fluctuations, acts on the pulse sensor 3 more than once, then at that time the secondary transducer 2 calculates the mass does not produce.

Claims (1)

A mass chamber liquid meter consisting of primary and secondary transducers, the primary transducer consisting of a horizontally arranged cylindrical body with inlet and outlet nozzles, in which a measuring unit is installed, comprising a cover and a back support, interconnected by two upper and one lower rods, moreover between the cover and the back support there is a measuring chamber with the possibility of its rotation, containing two open above the cavity and side plates, and on the side plates counterweights are fixed to the plates, and the angle of rotation of the measuring chamber is limited by shock absorbers installed on the upper rods, and on the cover there is a pulse sensor connected to the secondary transducer, and a nozzle is installed inside the housing after the inlet pipe, characterized in that two magnets are fixed on the cavities of the measuring chamber so that each of them has the ability to interact with the pulse sensor only in the extreme positions of the measuring chamber, and the pulse sensor has the ability enerirovat differing signals depending on which of the two magnets it interacts.

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