UA65737A - Membrane gas meter - Google Patents

Abstract

The proposed membrane gas meter contains a measuring unit that contains a casing with two sealed chambers, with a membrane in each chamber, and gas distribution unit. The chambers are separated from each other by a common partition. At the side surfaces of the casing, flanges are provided that are intended for coupling the measuring unit with the gas supply pipeline. At the upper part of the casing, a central longitudinal passage and side passages are made that connect the chamber cavities to the manifold of the gas distribution unit. In this manifold, a control valve is installed that opens and closes the manifold openings coupled with the casing passages. To displace the control valve, a driving mechanism is used that contains a shaft with an outside lever and an inside lever. The said levers are rigidly fitted to the shaft. The inside lever interacts with the control valve, and the outside lever is hinged to the rod of the drive mechanism actuator. At the casing flanges, rectangular grooves are provided that engage with rectangular projections of the corresponding flanges of the pipeline.

Description

The claimed invention relates to means of measuring consumed natural or vapors of liquefied hydrocarbon gases during commercial accounting in the utility sector, as well as during control of technological processes.

A well-known gas meter (application RF Me200032229/28 dated 04/29/1999), which contains several measuring chambers with deformable membranes, the central housing, has several channels that provide gas supply from the outside into the measuring chambers and its removal outside the central housing. The sealing plate is located on the surface of the central body in such a way as to partially cover the channels. The distribution cover contains four sections, each of which has the shape of a quarter of a circular sector and which are separated from each other by radial sealing membranes. When manufacturing the central body of the meter, casting is carried out under pressure.

A known gas meter that has improved guiding means (application of the Russian Federation Mo2000132221/28 dated 14.05.1999), containing several measuring chambers with deformed membranes, a distribution device installed with the possibility of rotation around the axis of rotation along the distribution surface, in which holes are made , each of which is connected to one of the measuring chambers, while the distribution device allows the gas to alternately enter and exit the measuring chambers as it rotates, and means for directing the rotation, containing a guiding part, at least a part of which has an elongated shape and which contains two cylindrical sections, distant from each other; two bearings in which cylindrical sections are installed with the possibility of free rotation. At the same time, the guide part is made of thermoplastic material, and the cylindrical sections have different diameters.

Known gas meters of the membrane type have the following general disadvantages: - uneven shrinkage of a casting of a complex shape with a variable cross-section; - sign-changing forces caused by cyclic oscillations of the membrane during meter operation.

A well-known membrane gas meter ("Oktagaz" gas meter AE1T (1.6; 52.5; 54 TU U 3.88-14312051-099-97), which contains a flow converter consisting of a measuring device that includes two hermetic membrane chambers, each of them has a double sealing unit, as well as internal and external cavities, separated by an elastic membrane with fastening and compression around its perimeter by a thin-walled flange of a U-shaped profile, which is the first sealing unit located inside the housing, and fixing the flange in in a pressed state due to fused pins made together with the housing and pre-inserted into the holes of the membrane and flange, the cavities are limited by the walls from the middle of the housing, and from the outside by the walls of the lids, the hermetic connection of the lids with the housing, which is the second unit of sealing of the membrane chamber, carried out due to ultrasonic welding along the planes of the outer flanges of the body and covers, rigid connection of the inner and outer levers with the shafts and is made by pressing the grooved surface of the shafts into the smooth holes of the levers, the movement of the shafts with the levers along the axis of the shafts is limited by protrusions made on the nozzle, the body is made by the method of casting under pressure, includes two inner cavities of membrane chambers with a common wall, which separates, and the side walls with internal flanges, along the supporting edges of the internal cavities of the membrane chambers, which have the shape of rounded rectangles with grooves made on the short side of the rectangle, located near the connection of the internal levers with the shafts and placed on the planes of the flanges with pins and external flanges, connected to the covers, which have contact planes made on two levels and on two inclined planes connecting them, there are holes for centering the internal levers with the shafts and placing a movable hermetic connection with the shafts, in the upper part of the case there are supporting elements for installing and connecting the nozzle on four screws, and each rack is on two pins with their displacement from the axis of the case, there is a pin located along the axis of the case, designed to fix the collector from turning, as well as a system of output channels located along the longitudinal axis of the case and connected in series - central, longitudinal, lateral, with a protrusion , made in the center of the central outlet channel, the upper part of which is located at the level of the upper plane of the housing, in which there is a hole in the center for installing the axis and connecting channels, and the two channels connecting the outer cavities of the membrane chambers are formed by the walls of the housing and are located with an offset from the axis of the housing, while the channels are elements of the gas distribution mechanism, which includes a collector located along the axis of the housing due to its centering with an axis installed in the central hole of the housing and which passes through the central hole of the collector, and the fixation against reversal is carried out due to a groove made by axis of the collector, which sits on the body pin, the lower part of the collector is glued without a guaranteed gap to the corresponding walls of the housing channels, and in the upper part, which has diaphragms of the collector grid, annular, located on the inner, middle, outer circles and four radial ones between the middle and outer circles, while all the membranes are in the form of narrow strips of width b, which are ground into a common plane and form a working surface in the form of a collector grid, which has through windows - the central outlet is limited by the middle and inner circles of the membrane and is connected through longitudinal and lateral channels made in the body and collector, through a nozzle with an outlet fitting, at therefore, a part of the side outlet channel is made in the collector, in the upper part of which there is an internal ledge, closed around the perimeter of the channel to ensure an adhesive connection with the nozzle, in the middle of the central outlet window there is a plane bounded by the inner circle of the membrane, through a hole in the center of which passes the axis installed in the housing, which determines the axis of rotation of the crank and the axle tnic, as well as the area of two or three ribs that connect the inner with the middle circles of the jumpers, four circular sector windows, while every two opposite windows are connected to the inner and outer cavities of the corresponding membrane chambers, while two channels that are connected to the outer cavities of the membrane chambers, made with an offset from the axis of the meter, and the centers of the sectors of the ring windows are located at a distance equal to half the width of the radial bridges from the axis of the mutually perpendicular axes of the collector, the spool, which includes the central outlet cavity and four ring sectors, while in in the middle of the central outlet cavity there is a tubular protrusion, the lower end of which is ground into a common plane along the working surface of the spool, the central outlet cavity is convex, and four annular sectors, one sector is made in the form of an open groove, intended for opening the sector windows of the collector, when filled with gas corresponding cavities of the membrane early chambers, the opposite sector is made in the form of a convex cavity, connected to the central outlet cavity and intended for opening the opposite windows of the collector when the corresponding cavities of the membrane chambers are freed from gas, the other two opposite sectors are made in the form of sliding planes, which after grinding slide on the ground surface the collector grids are free without a gap and are designed to close the corresponding windows of the membrane chambers when the membranes pass through the extreme positions, while the centers of the ring sectors are at a distance equal to half the width of the radial sections of the collector from the mutually perpendicular axes of the spool, a collet sleeve is installed in the central through hole of the spool with the ledge of the crank so that the connection has clearances in both the radial and axial directions, while the possibility of arbitrary disassembly is excluded, the protrusion of the crank enters the slot of the spool at a distance from the center of the spool, creating a leash hook ning of the crank with a spool, which is centered and receives rotational motion from the crank and has the ability to slide freely without distortions in a floating motion along the working surface of the collector grid, while the crank is installed on an axis with a minimum radial clearance, having support on the spherical end of the axis, at the same time rotating the movement from the crank with a toothed crown is transmitted by means of gear wheels installed on the rack, the output axis, to the counting device, and the mounting place of the rack on the body is shifted from the axis of the counter, in the hinged joints of the connecting rods with the fingers of the upper levers and the crank, on the upper cut part of the cylindrical fingers has a conical collar with a larger diameter than the diameter in the holes of the connecting rods, when assembling, the opening of the connecting rod squeezes the collar of the finger, while its diameter decreases, and after the collar exits the hole, its diameter increases due to the elastic forces of individual petals of the cut finger, preventing themselves, arbitrary disassembly of hinged joints, p the spigot, when it is fastened with four screws, rests on four supporting elements made on the body, while the protruding part, which is made on the lower part of the spigot, enters the collector channel with an adhesive connection, a sealed shell with connecting fittings and an output shaft, counting device.

This device is the closest in terms of technical essence to the declared device. Fig. 17, 18 shows a drawing of the prototype.

The prototype has the following significant shortcomings.

Membrane chambers have two sealing nodes, the inner one - between the inner and outer cavities and the outer one - between the outer cavity of the membrane chamber and the inner cavity of the gas meter.

External sealing units made by ultrasonic welding of the outer flanges of the case with the flanges of the covers, which are connected along planes located on two levels and inclined planes connecting them, significantly complicate the design of the case and covers and the processes of ultrasonic welding due to the complexity of ensuring the connection simultaneously on four surfaces.

The internal sealing unit due to the compression of the membrane with a thickness of 0.2 mm in the axial direction cannot ensure reliable tightness due to the following factors: - there is no stability in terms of the flatness of the flanges in the body, on which the membrane is pressed, due to the uneven shrinkage of the casting of a complex shape with a variable cross-section; - uneven pressing of the membrane is carried out by a thin-walled U-shaped flange, the reduction of membrane compression occurs as it moves away from the fastening pin; - a small thickness of the sealing material (equal to the thickness of the membrane fabric), which cannot compensate for the non-flatness of the support surface of the flange in the housing and the deflection of the pressure flange, which has insufficient rigidity; - sign-changing forces caused by cyclic oscillations of the membrane during meter operation are directed directly at the membrane compression node, which leads to loosening of the membrane compression site.

As a result, during the loads on the membrane caused by the operation of the meter at maximum flow rates, there are cases of the membrane pulling out from under the pressure flange, which leads to a deterioration of the tightness between the cavities of the membrane chambers, an increase in the cyclic volume, an increase in the relative error of the flow rate measurement of the meter, and in the case fluctuating gas pressure in the network, sudden gas switching on in the network or backlash, the membrane completely pulls out from under the flange, which leads to the loss of the tightness of the membrane chamber, and therefore to the failure of the meter, which reduces the reliability of the meter.

The rigid connection of the shafts with the internal and external levers, made by pressing the levers on the grooved surface of the shaft, does not ensure a reliable connection and, as a result of the forces on the lever, which occur during the period of sudden switching on of the maximum costs, the levers are scrolled on the surface of the shaft , which leads to a violation of the adjustment of the levers and failure of the meter due to jamming, which reduces the reliability of the meter.

Slots in the fingers of the hinged joints reduce the strength of the fingers, because during repeated assembly and disassembly of the hinged joints, caused by the need to adjust the flow converter or, in the presence of hidden casting shells, increased concentrated stresses occur in the elastic petals of the fingers, which lead to the failure of the petal and disconnection of the hinge connection, which leads to a violation of the setting or jamming of the meter, which reduces the reliability of the meter.

The axis, which is pressed into the housing, centers the collector and determines the axis of rotation of the crank and spool, while its location in the center of the collector and spool required the implementation of an additional hermetic movable connection in the design along the inner circle of the collector grid and the protrusion of the spool, which led to the complication of the design case, collector and spool.

Making a protrusion on the housing and two protrusions that define a groove between them, or a tide with a hole on the collector, designed to fix the collector from turning on the housing also leads to the complication of the design of the housing and collector.

There is a loss of tightness along the worn movable joint (collector grid - spool) due to a violation of the planarity of the collector grid during deformation of the inner circle of the membranes, caused by internal stresses due to the heterogeneity of the box-shaped collector design, as well as during thermocyclic fluctuations, which leads to an increase in the relative error flow measurement, especially for small flows.

The area that is limited by the inner circle of the diaphragms of the collector grid and the area of the ribs located between the inner and middle circles of the collector grid, as well as the area of the internal protrusion of the spool and the housing reduce the useful cross section of the central outlet window in the collector, the central outlet cavity in the spool, the central outlet channel in the housing , which leads to an increase in pressure loss in the gas meter at maximum flow rates, and being in the middle of the channel, they contribute to the formation of a turbulent gas flow, which leads to an increase in pressure loss at maximum flow rates in the meter.

The radial webs of the collector grid, Fig. 18, have the form of straight strips with a width p, the centers of the sectors of the annular windows of the collector grid E and the centers of the annular sectors of the spool p are located at a distance of half the width of the radial webs from the mutually perpendicular axes of the collector and the spool, respectively, which leads to the fact that when rotation of the spool, the overlapping of the sector windows of the collector grid occurs during rotation by a certain angle y, i.e. the line of the edge of the sector of the spool initially coincides with the line of the edge of the radial membrane of the collector grid at a point near the middle circle of the membrane of the collector grid, and as the spool continues to rotate, the point of coincidence moves along the edge of the radial membrane to the outer circle of the membrane of the collector grid and when the outer circle is reached, the sector window in the collector grid is completely overlapped. Thus, from the beginning of the closing moment to the end of the closing moment of the window, the inner and outer cavities of the membrane chamber continue, respectively, one to be filled with gas, the other to be freed from it, while the moment of switching the gas flows in the meter occurs for a certain period of time, which leads to to an increase in the relative error of gas flow measurement by a known gas meter (prototype).

The adhesive connection of the collector with the body, made without a guaranteed gap, does not provide a reliable hermetic connection in case of sharp changes in the temperature of the surrounding and working environment due to the fact that the materials being connected have different coefficients of thermal expansion, which leads to the fact that in the adhesive tangential stresses arise in the connection, and the small thickness of the glue in the form of a film that works on the cut does not provide compensation for breaking stresses that exceed the allowable ones, which leads to the destruction of the adhesive connection and loss of tightness, which, in turn, leads to an increase relative error of gas flow measurement, especially at minimum flow rates.

The part of the outlet channel, which is connected to the nozzle and is made in the collector, significantly complicates the design of the collector, in addition, excess glue when connecting the nozzle to the collector is pushed into the outlet channel and after polymerization of the glue, the formed flows reduce the cross section of the outlet channel, which leads to an increase meter pressure losses at maximum costs.

The attachment of the nozzle on the side outlet channel of the collector by four support elements with holes made on the body with the help of four screwed screws through the eyes made on the support flange of the nozzle complicates the design of the body, collector and nozzle and the assembly process.

The strength of the spigot attachment with the help of four screws clearly exceeds the required one, but it is impossible to implement the spigot attachment with two screws due to the location in the zone symmetrical to the plane of the connection of the spigot of the output shafts with the external levers, and with three screws it is impossible due to the fact that the spigot is attached to the body, and the adhesive is with its connection - with the collector.

The two channels in the collector and the housing, which are connected to the outer cavities of the membrane chamber, are made with an offset from the axis of symmetry of the gas meter, do not allow placing the place of attachment of the rack on the housing symmetrically to the axis of the gas meter, which does not allow in this design to realize the left-hand movement of gas in counter

The consumer qualities of the prototype are reduced, because the connection of a gas meter with right-hand movement of gas in the meter (a known technical solution) at a consumer where the supply pipelines fit on the left (about 5095 consumers) requires a complex installation kit, which increases the cost of the installation kit and installation work when connecting the meter and reduces aesthetic qualities due to the interweaving of pipes above the connected gas meter.

The technical shortcomings listed above lead to a decrease in the following consumer qualities of the membrane gas meter - prototype: - complexity and lack of the possibility of transformation of the design; - the possibility of jamming of the counter (stop) in case of loss of tightness in the case of rearranging the levers on the shafts; - low stability of the relative error of gas flow measurement; - high pressure losses at maximum gas consumption; - instability, (up to shutdown) operation with minimal, unstable gas consumption; - low consumer properties due to the high cost of a set of installation and installation works, the lack of universality of the design in relation to the left-hand passage of gas through the meter.

During the development of the declared membrane gas meter, the task of ensuring continuous functioning of the gas meter was solved under minimum, maximum, unstable gas consumption, as well as under other force majeure circumstances that lead to unstable passage of gas volumes through the meter. At the same time, the task of reducing the possibility of depressurization of membrane chambers, increasing the stability of the relative error of gas flow measurements, as well as creating a universal simple design of the meter, which provides the possibility of reducing costs when installing the meter at the consumer, regardless of the direction of gas supply (left or right), was solved.

The task is solved by the fact that in a membrane gas meter containing a flow converter, which consists of a measuring device that includes two sealed membrane chambers made of a single block, each of them has an inner and outer cavity, separated by an elastic membrane with its arrangement and compression along of the perimeter between the flanges and the fastening due to fused pins and limited from the middle by the walls of the case, and from the outside - by the walls of the covers, a system of shafts, with internal and external levers rigidly connected to each other, a case made by the method of casting under pressure, which includes two internal cavities of membrane chambers with a common wall that separates them and side walls with flanges, in the upper part it has supporting elements for installing and fixing a nozzle and a rack, as well as a system of outlet channels, consisting of serially connected central, longitudinal and lateral, and also connecting channels with the cavities of the membrane chambers, while there are channels elements of the gas distribution mechanism, which includes a collector, the walls of the lower part of which are glued to the corresponding walls of the housing channels, and the upper part has annular and radial diaphragms of the collector grille and through windows limited by diaphragms - the central outlet, which is connected through channels and a nozzle to the outlet fitting, and also four annular sector windows, a spool, which includes a central output cavity and four annular sectors, while the position of the axis and the rotary movement of the spool determines the crank, which receives movement from connecting rods, hinged to the outer levers and which, at the same time, transmits rotation to gears mounted on a rack fixed to the housing and an output shaft included in the hermetic shell with connecting fittings, a counting device, the sealing of each membrane chamber is carried out by one sealing unit due to compression of the membrane in the radial direction by a protrusion in the groove at the same time from two sides of the protrusion in two strips of equal width, which close the perimeter of the membrane chamber, while the groove is made on one of the connecting flanges of the body or cover, and on the other flange, a protrusion is made that enters the groove, with the same gap on both sides of the protrusion, the groove and the protrusion are rectangular in shape , in the connection of the shafts with the inner and outer levers, there are shims, in the hinge joints of the outer levers with the connecting rods at the upper end of the cylindrical pin of the lever, two diametrically opposite protrusions are made, located along the axis of the pin perpendicular to the longitudinal axis of the lever, and in the opening of the connecting rod there are two corresponding through grooves located along the axis of the hole perpendicular to the longitudinal axis of the connecting rod, the axis of the cantilever hole of the nozzle is located in the common axis of the collector grill and the opening of the body and determines the axis of rotation of the crank, and the collector is fixed from turning due to the insertion of its neck into the groove of the nozzle, while the central outlet the channel in the body, the window in the collector and the cavity in the spool are completed hollow, in the collector grids, the radial membranes have the form of ring sectors, while their centers and the centers of the ring window sectors, as well as the centers of the ring sectors of the spool are located in the center of the collector and the spool, respectively, two channels connecting the outer cavities of the membrane chambers, formed by the walls of the case, lids and collector, connected to each other by an adhesive joint and located with a stand fixed on the case along the axis of the meter, the nozzle is directly connected to the case and at the same time to the collector by an adhesive joint with a guaranteed gap determined by placement of the collector and nozzle on three protrusions made on the housing with a height equal to the gap, while the cuff, which is made on the lower part of the nozzle, goes along the inner diameter into the output side channel of the housing, and in the connection of the nozzle with the collector - the depth of the groove, equal to the gap , made inside the groove of the nozzle, into which the neck of the collector enters, the attachment of the nozzle on the side outlet one channel of the housing is carried out in one of the three reference points with the help of a nozzle protrusion that goes into an eye made in the housing, the axis of rotation of the spool can be determined by an axis installed in the opening of the housing and which passes through the center of the central outlets of the channel in the housing, windows in the collector and cavities in the spool.

Implementation of the claimed features of the invention allows solving the task and obtaining the claimed technical result, since: - strengthening the sealing of membrane chambers when compressing the membrane in the radial direction allows: a) instead of two sealing nodes of each membrane chamber, one can be performed, which ensures the tightness of the inner and outer cavity of the membrane chamber , both among themselves and with the internal cavity of the gas meter; b) exclude the pressure flange of the U-shaped profile from the design of the meter; c) to simplify the construction of the housing and covers and reduce their dimensions while maintaining the dimensions of the membrane chamber cavities, as well as to the possibility of making connecting planes of the housing and covers in one plane; - execution by casting method with fairly high accuracy of the protrusion and groove, rectangular shape between the walls of which the membrane is simultaneously clamped from two sides, the balancing of clamping forces between the walls of the groove and the protrusion in the radial direction allows not to transfer deformations to the body and cover, and compression of the membrane occurs at depth immersion of the protrusion into the groove, i.e. along two strips of equal width, located on two sides of the protrusion and closing the perimeter of the membrane chambers; - non-planarity of the flanges can lead to a local decrease in the depth of immersion of the protrusion into the groove, as a result of which the width of the strips of the compressed membrane can decrease, but this will not lead to a violation of the tightness of the connection; - during assembly with the help of tools, a significant axial force is applied to the flanges of the housing and cover to pull in and compress the membrane with a protrusion in the groove, then the flanges are fixed in a compressed state due to fused pins, which are made by the method of casting simultaneously with the housing and are previously inserted into the holes of the membrane and covers, and after melting the pins in the axial direction, the force is practically absent, in the radial direction, the force is localized in the groove; - alternating loads acting on the membrane during the operation of the meter are applied along the inner edges of the flanges of the case and cover, and the place of compression of the membrane is in the depth between the flanges, which prevents loosening of the connection. An additional advantage of the claimed invention is the weakening of the requirements for non-planarity of the flanges of the body and cover, increasing the reliability of the meter due to the exclusion of the possible pulling out of the membrane, increasing the stability of the relative error of the flow measurement due to the improvement of the tightness of the membrane chambers and the exclusion of changes in the cyclic volume; - cotters, made in a rigid connection of shafts with internal and external levers, exclude the possibility of scrolling in the connections of shafts - levers, which increases the reliability of the meter by eliminating the possibility of increasing the forces of the transition of the membranes in the extreme positions or jamming of the gas meter;

- in the hinge joints of the external levers with the connecting rods, two diametrically opposite protrusions located along the axis of the finger, perpendicular to the longitudinal axis of the lever, are made on the upper end of the cylindrical finger of the lever, and two corresponding through grooves are made in the hole of the connecting rod, located along the axis of the hole, perpendicular to the longitudinal axis connecting rod, while the assembly of the hinge joint is carried out by aligning the grooves of the connecting rod with the protrusions on the lever finger, with the position of the connecting rod in the non-working range with the subsequent rotation of the connecting rod to the position of the working range of rotational-oscillating movement of the connecting rod around the axis of the lever finger, and the protrusions on the finger prevent joint joint.

In the hinged joints of the external levers with the connecting rods, the fingers are made continuous, the hole of the connecting rods, when the grooves are aligned with the protrusions on the finger, will connect freely without elastic deformations and does not cause tension in the finger, this implies multiple assembly and disassembly of the hinged joint, during which the possibility of finger breakage is excluded, even if there are hidden casting shells in it, which increases the reliability of the counter by increasing the reliability of the hinged joints, which excludes the possibility of disconnecting the hinged joints, which leads to a violation of the setting or jamming of the meter;

- the axis of the cantilever opening of the nozzle, which is located in the common axis of the collector grill and the housing opening, and determines the axis of rotation of the crank, allowed the central output channel in the housing, the window in the collector and the cavity in the spool to be made hollow, that is, it allowed to exclude the shaft that determines the axis from the design of the meter the rotation of the crank and spool, as well as the centering collector from the collector design - the inner circle of the membrane of the collector grid and the ribs connecting the inner with the middle circle of the collector, as well as the internal projection of the body and spool and transfer the setting functions to the common axis of the axis of the nozzle cantilever opening, grids of the collector and the opening of the housing on the centering equipment, which is used repeatedly, without complicating the process of assembly and gluing, which led to the simplification of the design of the housing, collector, spool and improved tightness of the moving connection of the collector - spool due to the exclusion from the design of the most prone to the deformation of tick, the inner circle of the collector grid with the internal protrusion of the spool, which made it possible to increase the stability of the relative error of flow measurement at low flows and, thereby, to increase reliability and reduce pressure losses in the meter at maximum flows due to the increase in the cross-sectional area of the outlet central channels of the housing, the collector window and spool cavities, as well as the exclusion of elements that contribute to the formation of a turbulent flow;

- the collector, which is fixed from turning by inserting its neck into the groove of the nozzle, made it possible to exclude from the design of the body a protrusion and two protrusions that define a groove between them or a tide with a hole from the design of the collector, intended for fixing the collector from turning it on the body and transfer the function of fixing from turning on the structural element - the neck of the collector, which enters the groove of the nozzle to ensure an adhesive connection with the nozzle and at the same time fixes the collector from turning on the body, which made it possible to simplify the design of the body and collector;

- it is possible to determine the axis of rotation of the spool directly due to the axis installed in the housing and which passes through the center of the central outlet channel of the housing, the window of the collector grid and the cavity of the spool, while the small diameter of the axis does not affect the reduction of the cross section of the outlet window and does not create conditions for the formation of a turbulent flow , while maintaining the advantages and, in the case when the axis of rotation of the spool is determined by the axis of the crank installed in the cantilever hole of the nozzle;

- the presence of four radial diaphragms in the form of ring sectors in the collector grids, while their centers and the centers of the ring windows, as well as the centers of the ring sectors of the spool located in the center of the collector and the spool, respectively, allows you to overlap the windows in the collector grid instantly, that is, the edges of the planes of the annular sectors of the spool, which act as gate valves located along the radius of the spool, when the spool rotates, run into the edges of the planes of the radial webs in the collector grid, which are also located along the radius of the collector and, when the centers of rotation of the spool and the center of the collector are combined, the lines of the edges of the planes the sectors of the spool and the radial membrane of the collector are connected along the same line of radius in the common center of the spool and the collector, which made it possible to cut off with greater accuracy the moment of the end of gas filling of one cavity and the release of gas from the other cavity of the membrane chambers, which in turn leads to an increase in the accuracy of the relative error gas meter consumption measurement;

- two channels connecting the outer cavities of the membrane chambers, formed by the walls of the case, lids and collector, connected directly to each other with an adhesive joint and located with a stand fixed on the case along the axis of the meter, allow expanding the design possibilities of the product without complicating the design, that is, they allow products with right-hand or left-hand movement of gas in the meter to be obtained from the same parts due to rearrangement;

- a nozzle directly connected to the body and, at the same time, to the collector by an adhesive connection with a guaranteed gap 5, filled with glue, which is determined by placing the collector and the nozzle on three protrusions made on the body with a height equal to the gap, while the cuff, which is made on the lower part of the nozzle, goes along the inner diameter into the outlet side channel of the body, and in the connection of the nozzle with the collector - the depth of the groove, made inside the groove of the nozzle into which the neck of the collector enters, allow:

a) after polymerization of the glue, with a thickness of 5, it acts as an elastic gasket of the same thickness, which takes on the deformations of the connected parts, compensating for them with the elastic properties of the gasket, which protects the adhesive joint from destruction and loss of tightness in the event of a sharp temperature drop working and environment, which allows to increase the reliability of the meter in terms of the stability of the relative error of flow measurement, especially at minimum costs;

b) the adhesive connection of the nozzle directly to the body and at the same time to the collector made it possible to transfer part of the outlet channel from the collector to the nozzle, which greatly simplified the design of the collector as a part, which has a more complex manufacturing technology by pressing or casting under high pressure from phenoplastics and transferred to the nozzle , which is made from polyformaldehyde by the pouring method, practically without complicating the technological process for the pipe; c) the cuff of the pipe entering the side outlet channel of the housing prevents the leakage of glue with the formation of overflows on the inner surface of the outlet channel, which stabilizes the pressure loss of the meter at maximum flow; - the fitting of the nozzle on the side outlet channel of the housing, carried out at one of the three support points using the protrusion of the nozzle that goes into the eye, made on the housing made it possible to simplify the design of the housing, the nozzle and the process of assembling the nozzle with the housing.

The proposed membrane gas meter has the following consumer properties: - a simple design that ensures a continuous measurement process in unstable and extreme operating conditions; - high stability of the accuracy of the relative error of gas flow measurement, regardless of operating conditions; - small pressure losses at maximum gas consumption; - low costs for installation work at the consumer with high ergonomic and aesthetic characteristics.

Fig. 1 shows the construction of a membrane gas meter, a general front view in section; Fig. 2 shows view A from the left in section; Fig. 3 shows the remote element B of the assembly kit in connection with the meter fitting; Fig. 4 shows the remote element B of the membrane chamber sealing unit; Fig. 5, 6, 7, 8, 9 show the structure of the case - head view, top view G, section D - D along the axis, sections E-E and Z-Z, respectively; Fig. 10, 11, 12 show the construction of the collector, bottom view, section I-I, top view, respectively; Fig. 13, 14 shows the design of the spool, bottom view, section along the axis, respectively; Fig. 15 shows the construction of a membrane gas meter with left-side gas movement, front view; Fig. 16 shows the construction of a membrane gas meter with the definition of the center of rotation of the spool due to the axis installed in the housing, view A on the left, in section; Fig. 17 shows the design of the membrane chamber sealing unit of the gas meter "Oktagaz" АРИ 1.6; 02.5; 64 TU U 3.88-14312051-099-97; Fig. 18 shows the diagram of overlapping the windows of the collector grid with the annular sector planes of the spool in the membrane gas meter "Oktagaz" АРИ 1.6; 52.5; 54 TU U 3.88-14312051-099-97;

The claimed membrane meter contains the elements presented in Fig. 1 - Fig. 16: - gas flow converter 1, - hermetically sealed shell of the meter 2, - counting device 3, - installation kit 4, - measuring device 5, - gas distribution mechanism 6, - clamp 7 , - housings lower 8, upper 9, - input connecting piece 10, - output connecting piece 11, - sealed output axis 12, - corrector 13, - roller type adder 14, - nozzle 15, - nut 16, - gasket 17, - sealed membrane chambers 18, 19, - internal cavities 20, 21, - external cavities 22, 23, - body 24, - covers 25, 26, - elastic membranes 27, 28, - body flanges 29, 30; - cover flanges 31, 32; - performances 33, 34; - projection planes 35, 36, 37, 38, - grooves 39, 40, - groove planes 41, 42, 43, 44, - pin heads 45.46, - pins 47 48, - external cheeks 49, 50, - internal cheeks 51, 52, - internal levers 53, 54, - external levers 55, 56 - shaft diameters 57, 58, - cotters 59, 60, - shafts 61, 62, - cuffs 63, 64, - plugs 65, 66, - protrusions in the housing , which limit the movement of the shafts 67, 68,

- plane of channels in the upper part of the body 69, - protrusions under the collector 70, 71, 72, - protrusions under the nozzle 73, 74, 75, - eyelet 76, - central outlet channel 77, - longitudinal outlet channel 78, - side outlet channel 79 , - hole in the center of the body 80, - channels connecting to the internal cavities of the membrane chambers 82, 83, - channels connecting to the external cavities of the membrane chambers 84, 85, - supporting elements 86, 87, 88, 89, - collector 90 , - spool 91, - leash 92, - crank 93, - connecting rods 94, 95, - nozzle 96, - rack 97, - gear gear 98, - ratchet gear 99, - dog 100, - inner ring of membrane 101, - outer ring of membranes 102, - radial membranes 103, - collector grid 104, - central outlet window 105, - circular sector windows 106,107,108,109, - channels symmetrical along the meter axis 110, 111, - screw walls 112, 113, - collector neck 114, - central exit cavity 115, - open sector 116, - convex sector 117, - sec tori-planes 118,119, - a blind hole in the center 120, - a protrusion, offset from the center for engagement with a leash 121, - a cantilever hole 122, - a nozzle protrusion 123, - a nozzle eye 124,125 - a protruding cuff 126, - a side groove 127, - a groove in the groove 128, - the axis that determines the axis of rotation of the spool 129, - the internal hole of the spool 130.

Thus, the claimed membrane gas meter contains a flow converter 1, a hermetic shell 2, a counting device 3, a mounting kit 4.

The flow converter 1 consists of a measuring device 5 and a gas distribution mechanism 6.

The hermetic shell 2 consists of a clamp 7, which hermetically connects the lower case 8 and the upper case 9, which includes connecting fittings input 10 and output 11, as well as a hermetic output axis 12, located along the axis of the gas meter.

The counting device Z consists of a corrector 13, which includes a gear with transmission and correcting wheels, as well as a roller-type adder 14, which registers the volume of gas consumed.

Assembly kit 4 consists of nozzles 15, nuts 16, gaskets 17 (2 pcs. each).

The measuring device 5 includes two hermetic membrane chambers 18, 19 made of a single unit, each of them has internal cavities 20, 21 and external cavities 22, 23, which are limited by the walls from the middle of the body 24, and outside by the walls of the covers 25, 26 and separated by elastic membranes 27, 28, fixed along the contour between the housing flanges 29, 30 and covers 31, 32, and the tightness of the membrane chambers between the cavities 20, 21, 22, 23, as well as between these cavities and the inner cavity of the meter is achieved due to compression of the membrane in the radial direction protrusions 33, 34 along the planes 35, 36, 37, 38 simultaneously from two sides in the grooves 39, 40 along the planes 41, 42, 43, 44, i.e. the compression of the membrane occurs along two strips of equal width Г, which close the perimeter of the membrane chambers, when in this way, the flanges are kept in a compressed state due to the fused heads 45, 46 of the pins 47, 48, made by the casting method together with the body 24, on which the membranes are put through the pre-prepared holes rings 27, 28 and flanges 31, 32 of covers 25, 26.

The middle part of the elastic membranes 27, 28 is fixed with the help of fused pins between the outer cheeks 49, 50 and the inner cheeks 51, 52, which form the movable rigid centers of the elastic membranes and due to the hinged connection of the inner cheeks 51, 52 with one end of the inner levers 53 .

57, 58 and cotter pins 59, 60 on shafts 61, 62, which with the help of cuffs 63, 64 and plugs 65, 66 form movable hermetic connections of the rotary-oscillating movement of the shaft with the fixed body 24.

The body has protrusions 67, 68 that limit the movement of the shafts 61, 62 with rigidly connected internal 53, 54 and external 55, 56 levers along the axis of the shafts, respectively.

In the upper part of the case, channels are made, the walls of which have a common plane 69, above which three protrusions are made, which determine the guaranteed gap of the adhesive joint for installing the collector 70, 71, 72 and the nozzle 73, 74, 75, and near the protrusion, located along the axis of the housing, an eyelet 76 is made for attaching a nozzle.

The system of output channels consists of serially connected central 77, longitudinal 78 and lateral 79 channels located along the axis of the body.

In the center of the output channel, a hole 80 is made for centering the collector grid and the cantilever hole on the nozzle bracket or for installing an axis that can determine the axis of rotation of the spool.

Connecting channels connecting with the cavities of membrane chambers of internal 82, 83 and external 84, 85, which are formed by the walls of the housing 24 and covers 25, 26 and are located along the axis of the housing, are also made fastening of the rack when performing a counter with a right-hand movement of gas in it and 88, 89 - with a left-hand one.

The gas distribution mechanism b includes a collector 90, a spool 91, a leash 92, a crank 93 with a toothed crown, connecting rods 94, 95, a nozzle 96, a rack 97 fixed on the support elements 86, 87 of the body 24 along the axis of symmetry of the body with gear wheels installed on it: gear 98, which engages with the toothed crown of the crank 93; ratchet 99, with end engagement and which has a leash engagement with the output shaft 12, as well as a dog 100, which blocks the countdown of the counter.

The collector 90 has webs located along the inner 101 and outer 102 circles in the form of annular strips and four radial, ring-shaped sectors 103 located between the inner and outer circles 101, 102 of the webs, while the upper edges of the webs are ground into one common plane and form a grid 104, a collector, in which there are through windows - a central outlet 105 and four circular sectors 106, 107, 108, 109, with the center located in the center of the collector grid.

In the lower part of the collector there are cavities connected to the corresponding windows and limited by walls, the configuration of which in the lower plane of the collector corresponds in the plane of the adhesive connection to the configuration of the walls of the channels in the plane 69, made in the upper part of the housing 24 and covers 25, 26, while the channels 110, 111 of the collector are located along the axis of the collector, and the walls 112, 113, which form these cavities, have a helical surface.

The central outlet window 105 of the collector is connected through a system of outlet channels of the central 77, longitudinal 78, side 79, which are formed together by the walls of the body 24, the collector 90 and the nozzle 96, then through the nozzle with the outlet fitting.

The neck 114 of the collector is made on the longitudinal channel 78, intended for adhesive connection with the nozzle 96, as well as for fixing the collector against its reversal.

The spool 91 in the lower part has a central exit cavity 115 of a convex shape and four annular sectors, one sector is made in the form of an open groove 116 and is intended for opening windows when filling the corresponding cavities of the membrane chambers with gas, the opposite sector is made in the form of a convex cavity 117, connected with the central exit cavity 115 and intended for opening the windows when the corresponding cavities of the membrane chambers are freed from gas, the other two opposite sectors 118, 119 are made in the form of sliding planes, which, after grinding, slide along the polished surface of the grid 104 of the collector 90 freely without a gap and are intended for closing corresponding windows of the membrane chambers when the membranes pass through the extreme positions, while the centers of the ring sectors 116, 117, 118, 119 are located in the center of the spool.

In the upper part of the spool, there is a blind hole 120 in the center, intended for centering the spool, and a projection 121 offset from the center, intended for engagement with the leash when the rotational movement is transmitted to the spool.

The nozzle 96 has a bracket on which the hole 122 cantilever is located, which is located in the common axis of the grid 104 of the collector 90, the hole 80 of the housing 24 and the meter as a whole.

In the lower part of the nozzle, a flange is made, on which there is a protrusion 123, and two lugs 124, 125, which rest at three points on the corresponding protrusions 73, 74, 75 of the body, while creating a guaranteed gap 5 of the adhesive connection with the plane 69 of the body, equal to the height of the protrusions made during fastening of the nozzle on the side 79 outlet channel of the housing due to the insertion of the protrusion 123 of the nozzle into the lug 76 of the casing and the tightening of two screws through the lugs 124, 125 of the nozzle into the holes of the support elements 74, 75 of the casing.

On the flange of the nozzle in the lower part, a protruding cuff 126 is made, which enters along the inner diameter of the side outlet channel 79 of the housing, while the distance of the axis of the cantilever hole 122 of the nozzle to the axis of the opening 80 of the housing is determined, and the cuff also prevents the leakage of glue with the formation of overflows inside the side outlet channel 79.

The pipe has a lateral vaulted groove 127, inside which a groove 128 with a depth of 5 is made, which defines a guaranteed gap filled with glue in the adhesive connection of the collector neck 114 with the nozzle 96, in addition, the collector neck 114, which is in connection with the groove 127 the nozzle prevents the collector from turning.

The polymerized glue located in the guaranteed gaps of 5 glue joints of the nozzle with the collector and at the same time with the body acts as an elastic gasket.

A crank 93 with a toothed crown is installed in the cantilever hole 122 from above. From below, under the bracket, a leash 92 with a tight fit is installed on the crank rod, which eliminates the displacement of the leash along the axis and scrolling due to the reverse cone and key connection, while the crank and leash rotate in the hole 122 freely and without jamming.

The lower end of the crank enters the hole 120, which determines the position of the axis of the spool, and the groove of the leash enters the offset protrusion 121 of the spool, thereby creating a leash engagement and, due to which, the rotational movement is transmitted from the crank through the leash to the spool.

Connecting rods 94, 95 are hingedly connected at one end to the outer levers 55, 56, respectively, and at the other end to the crank 93.

The hinged connection of the connecting rod with the upper lever is made in such a way that on the upper end of the cylindrical finger of the lever, two diametrically opposite projections are made, located along the axis of the finger, perpendicular to the longitudinal axis of the lever, and in the hole of the connecting rod, two corresponding through grooves are made, located along the axis of the hole perpendicular to the longitudinal axis axis of the connecting rod, assembly of the hinge joint is carried out by aligning the grooves of the connecting rod with the protrusions on the finger, when the longitudinal axes of the connecting rod and the lever are located in one line and this position of the connecting rod is in the non-working range, with the subsequent rotation of the connecting rod to the position of the working range of the rotary-oscillating movement of the connecting rod around the axis of the lever finger, while the protrusions on the finger do not coincide with the grooves of the connecting rod and prevent disconnection of the hinge joint.

The hinged connection of the connecting rods with the crank finger is made in such a way that the upper cut part of the cylindrical finger has a conical collar with a larger diameter than the diameter in the connecting rod holes, when assembling the connecting rod holes, the finger collar is pressed, while its diameter decreases, and after the collar exits the hole its diameter increases due to the elastic forces of the individual petals of the cut finger, which prevents arbitrary disassembly of the hinge joint.

The axis 129, installed in the hole 80 of the housing 24, determines the axis of rotation of the spool 91 due to the fact that the spool with the inner hole 130 is installed on the upper part of the axis 129, while the crank 93 is made without the lower part of the rod and does not determine the axis of rotation of the spool, but the rotational movement to the spool is also transmitted from the crank 93 due to the entry into the engagement of the groove of the leash 92 on the protrusion 121 of the spool 91 displaced from the center.

Purpose of the main nodes of the gas meter: - the measuring device 5 consists of two membrane chambers 18, 19, which is the primary element of measurement, the amount of gas passing through them in one cycle determines the cyclic volume of the gas meter, the membrane chambers are filled with gas and released from it due to the action of the gas distribution mechanism 6; - the gas distribution mechanism 6 simultaneously performs the functions of: a) connecting gas flows from the meter inlet to the measuring membrane chambers 18, 19 and from them to the meter outlet due to the rotation of the spool 91; b) transmission of movement from the rigid center of the membranes 27, 28 through internal levers 53, 54, shafts 61, 62, external levers 55, 56, connecting rods 94, 95, crank 93, gears 98, 99 and through the output axis 12 to the counting device 3; c) self-locking of the counter countdown due to the dog 100, which engages in ratchet engagement with the wheel 99 and stops its rotation if the gas meter is connected to the network in the opposite direction indicated by the arrow on the body; - hermetic shell 2, consisting of steel cases 8, 9, ensures the hermeticity of the meter in operation, as well as fire safety requirements; - the corrector 13 transfers the rotation from the output axis 12 to the adder 14 with the help of a gear, while at the adjustment stage the necessary correction of the cyclic volume is established and the permissible relative error of the flow measurement is adjusted; - totalizer 14 of the roller type with a digital scale allows you to register and read the measurement results in the decimal position system of indicating the volume of gas passing through the meter, in m3; - assembly kit 4 provides a hermetic connection of the gas meter to the gas main due to the welded connection to the pipeline on one side of the nozzles 15 and on the other side of the connection to the fittings 10, 11 of the meter due to the nuts 16 and gaskets 17; - the modification of the gas meter with the left-side movement of gas in it differs from the basic design with the right-side movement of gas in that: a) the rack 97 with the wheels 98, 99 and the dog 100 installed on it is reinstalled on the body 24 from the other side on the support elements 88, 89 ; b) the flow converter 1 is turned 180", while fitting 10 becomes the outlet, and 11 - the inlet; c) the arrow indicating the direction of gas movement on the body 9 is applied with the tip to the left.

The claimed membrane gas meter can be made from known standardized elements and by known technologies from standardized materials. The proposed membrane gas meter works as follows. When gas-consuming devices (stove, boiler, column, etc.) are turned on, gas from the main line under operating pressure enters through the inlet fitting 10 into the cavity of the hermetic shell of the meter 2 as it is consumed.

The spool 91, being on the collector 90 in an arbitrary position, with its sector groove 116 opens any sector window of the collector grid 104, for example, when the sector window 106 is opened, gas enters the outer cavity 22 of the membrane chamber 18 and moves the rigid center of the membrane 27 to the wall of the case , while the gas in the internal cavity 20 is displaced through the channels, the sector window 108 of the collector grid 104, the sector cavity 117 and the central output cavity 115 of the spool 91, the central output window 105 of the collector grid, the channel, the nozzle 96 and the outlet fitting 11.

When the membrane 27 reaches the extreme position, near the wall of the housing 24, the cavity 22 is completely filled with gas, and the cavity 20 is completely freed from gas, that is, when the membrane 27 is moved from one extreme position (near the outer cover 25) to another extreme position (near the housing 24) the operation of the counter is half a cycle and the spool, turning 180", switches the flows in the opposite direction, while the spool 91 opens the sector window 108 of the collector 90 with the sector groove 116, the gas enters the inner cavity 20 and moves the rigid center of the membrane 27 to the outer cover 25, at the same time, the gas in the outer cavity 22 is displaced through the channels, the sector window 106 of the collector grid 104, the sector cavity 117 and the central outlet cavity 115 of the spool 91, the central outlet window 105 of the collector grid, the channel, the nozzle 96 and the outlet fitting 11, when reaching the membrane 27 of the extreme position near the cover 25, the cavity 20 is completely filled with gas, and the cavity 22 is completely freed from gas, that is, when moving the membrane 27 from the other extreme position (from the body 24) to the first extreme position (near the cover

25) the operation of the counter is the second half of the cycle and the spool, turning another 180", returns to its previous position and switches the flow of gas in the reverse direction, the operation of the counter is one full cycle, which is repeated in the same way.

The reciprocating movement of the membrane 27 is transmitted through the hinged connection in the inner cheek 51 to the internal lever 53, the shaft 61, the external lever 55, which perform rotational-oscillating movement around the axis of the shaft 61, is transmitted by means of the connecting rod 94 with hinged connections on the crank 93, which performs a rotational movement, is transmitted through the leash 92 to the spool 91, which performs the switching of gas flows that pass through the membrane chambers 18, 19, at the same time, the rotational movement from the crank 93 using the gear transmission of the wheels 98, 99, the output axis 12 on counting device 3.

The diaphragm chamber 19, which is shifted by the cycle by 90", works similarly, that is, when the rigid center of one membrane chamber is in the extreme position with the greatest resistance forces, at this time the rigid center of the other membrane chamber is in the middle position with the smallest resistance forces, in such method, membrane chambers 18, 19 help each other to overcome the forces when passing the extreme positions, which also smooths out the pulsations of the gas that passes through the meter.

Compared to the prototype, the claimed membrane meter has the following advantages: - simplification of the meter design by ensuring the tightness of each membrane chamber with one sealing unit instead of two, exclusion of the U-shaped profile flange from the design, simplification of the design of the housing and covers and reduction of their overall dimensions, relaxation of requirements for non-planarity presented to the mating surfaces of the body and covers; - increasing the stability of the relative error of gas flow measurements made it possible to exclude partial pulling out of the membrane from under the flange. Eliminating the possibility of depressurization of the membrane chambers also made it possible to increase the reliability of the meter in case of sudden switching on of large gas flows, fluctuations in gas pressure in the network, backlashes; - the rigid connection of the shafts with the levers, made by a tight fit along the diameter and the shims, made it possible to increase the reliability of the meter by eliminating the possibility of the levers turning on the shafts, which leads to a violation of the meter setting and its jamming; - the axis of rotation of the crank, which is determined by the axis of the cantilever hole made on the nozzle bracket, made it possible to make the central outlet window in the collector and the cavity in the spool and the channel in the housing hollow, which led to a simplification of the meter design, to an increase in the stability of the relative error of gas flow measurements, a decrease pressure losses on the gas meter due to the exclusion from the design of the collector and spool of elements that are most prone to deformation and the formation of a turbulent flow; - execution of radial membranes in the collector grids, which have the shape of sectors, so that their centers and the centers of the sectors of the ring windows, as well as the centers of the ring sectors of the spool located in the center of the collector and the spool, respectively, made it possible to increase the accuracy of the relative measurement error of the declared membrane counter of gas due to a clearer switching of gas flows, which fills and empties the cavities of the membrane chambers, which occurs when the edges of the radial sector planes of the spool and the radial membranes of the collector are completely aligned; - the stated design of the gas meter makes it possible to reduce the costs of its installation at the consumer and to increase the ergonomic and aesthetic characteristics due to providing the possibility by means of installation rearrangement, to obtain a ready-made meter with the left-hand movement of gas through the meter, as well as the use of a simple installation kit, which excludes the interweaving of pipes during connection counter; - performing an adhesive connection of the collector with the nozzle and connecting them to the body with a guaranteed gap, which determines the thickness of the polymerized glue in the joints, made it possible to increase the reliability of the adhesive connection in terms of tightness under sharp changes in the working and ambient temperatures, which, in its in turn, stabilizes the relative error of gas flow measurements, especially at minimum consumption, in addition, the adhesive connection of the nozzle simultaneously with the body and the collector greatly simplifies the design of the collector due to the exclusion of the outlet channel from the design of the collector and its transfer to the nozzle; - in the hinged connections of external levers with connecting rods on the fingers of two projections, and in the holes of the connecting rods - two corresponding through grooves made it possible to increase the reliability of the hinged connection due to the elimination of deformations when assembling the hinged connection; - fastening of the nozzle on the body with the help of a protrusion of the nozzle that goes into the eye of the body, made it possible to simplify the design of the body and the nozzle. - fastening of the nozzle on the body with the help of a protrusion of the nozzle that goes into the eye of the body, made it possible to simplify the design of the body and the nozzle.

Research and development of the claimed membrane gas meter has been carried out.

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B/2 from the center of the spool.y - the angle during which the overlap ends or the opening of the collector windows, connected to the corresponding cavities of the membrane chambers, occurs.

Claims (2)

1. Membrane gas meter containing a flow converter, which consists of a measuring device that includes two sealed membrane chambers made of a single block, each of which has an internal and external cavity separated by an elastic membrane fixed around the perimeter between the flanges and fixed with fused pins , and limited from the middle by the walls of the case, and from the outside by the walls of the covers, a system of shafts with internal and external levers rigidly connected to each other, a case made by the method of casting under pressure, which includes two internal cavities of membrane chambers with a common wall separating them, and side walls with flanges, in the upper part, the case has supporting elements for installing and fixing the nozzle 1 of the rack, and a system of output channels consisting of serially connected central, longitudinal and side channels, as well as connecting channels with membrane chamber cavities, at the same time, the channels are elements of the gas distribution mechanism, which includes a collector, which the walls of the lower part are glued to the corresponding walls of the housing channels, and in the upper part it has ring and radial membranes of the collector grid and through windows limited by membranes - the central outlet, which is connected through channels and a nozzle to the outlet fitting, as well as four ring sector windows, a spool, which includes a central outlet cavity and four annular sectors, while the position of the axis and the rotary movement of the spool is determined by a crank connected to connecting rods that are hinged to external levers, the crank is simultaneously connected to gear wheels mounted on a rack that is fixed to the body, and with the output axis, which is included in a sealed shell with connecting fittings, 1 in a counting device, which differs in that in each membrane chamber, to ensure sealing, the membrane is fixed in a groove in two strips of equal width on two sides of the protrusion, while the groove made on one of the connecting flanges of the body or cover, and on the second flank, there is a protrusion that enters the groove with the same gap on both sides of the protrusion, the groove and protrusion are rectangular in shape, in the connection of the shafts with the inner and outer levers, there are shims, in the hinge joints of the outer levers with connecting rods on the upper at the end of the cylindrical pin of the lever, two diametrically opposite projections are made, located along the axis of the pin, perpendicular to the longitudinal axis of the lever, and in the hole of the connecting rod, two corresponding through grooves are made, which are located along the axis of the hole, perpendicular to the longitudinal axis of the connecting rod, the axis of the cantilever hole of the nozzle is located in the common axis collector grilles and the opening of the housing and determines the axis of rotation of the crank, and the collector has a neck for fixing it in the groove of the nozzle from turning, while the central outlet channel in the housing and the window in the collector are hollow, in the collector grilles, the radial membranes have the form of annular sectors, while their centers and centers of ring window sectors, as well as ring centers x sectors of the spool are placed in the center of the collector and the spool, respectively, two channels connecting the outer cavities of the membrane chambers, which are formed by the walls of the housing, covers 1 of the collector, connected to each other by an adhesive joint, 1 are located with a rack fixed to the housing along the axis of the meter, the nozzle is directly connected to the body and at the same time to the collector by an adhesive connection with a guaranteed gap, which is determined by placing the collector and the nozzle on three protrusions made on the body with a height equal to the gap, while the cuff, which is made on in the lower part of the nozzle, inserted along the inner diameter into the outlet side channel of the housing, and in the connection of the nozzle with the collector - the depth of the groove, equal to the gap made inside the groove of the nozzle, into which the neck of the collector is inserted, the attachment of the nozzle to the side outlet channel of the housing is carried out in one from three support points using the protrusion of the nozzle, which is inserted into the eyelet, which is made in the body. 2. The counter according to point I, which differs in that the axis of rotation of the spool is determined by the axis installed in the opening of the housing, which passes through the center of the central outlet of the channel in the housing, the window in the collector and the cavity in the spool.