CN106123987B - G2.5 diaphragm type gas table - Google Patents
G2.5 diaphragm type gas table Download PDFInfo
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- CN106123987B CN106123987B CN201610704825.0A CN201610704825A CN106123987B CN 106123987 B CN106123987 B CN 106123987B CN 201610704825 A CN201610704825 A CN 201610704825A CN 106123987 B CN106123987 B CN 106123987B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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Abstract
The invention discloses a G2.5 diaphragm gas meter, wherein a machine core is arranged in a mounting shell, the machine core comprises a machine core body, a flow channel structure is arranged at the top of the machine core body, the cross sections of a gas distribution flow channel and a gas outlet flow channel are of hexagonal structures formed by overlapping any one side of a rectangle and the longer bottom edge of an isosceles trapezoid, a partition plate is arranged in the gas distribution flow channel, a valve grid is arranged at the top of the machine core, and two valve covers are arranged on the valve grid; the two vertical shaft fixing pipes are respectively provided with a vertical shaft, the other ends of the vertical shafts are connected with a transmission mechanism, an error adjusting mechanism is arranged on the transmission mechanism, and the transmission mechanism is connected with two valve covers. According to the invention, the flow channel and the valve grating in the movement are improved and designed, and the error adjusting mechanism is further arranged, so that the revolution volume in the G2.5 diaphragm gas meter is 0.8L, the national standard GB/T6968 of the diaphragm gas meter can be met, the flow channel structure is more optimized, the metering precision is high, the volume of the gas meter is reduced, and the cost of parts, packaging, transportation and storage is greatly reduced.
Description
Technical Field
The invention relates to the field of diaphragm gas meters, in particular to a G2.5 diaphragm gas meter with a revolution volume of 0.8L.
Background
The diaphragm gas meter belongs to a volumetric gas volume metering instrument, and is a metering system consisting of two containers, each container is divided into two metering chambers through a diaphragm, the diaphragm is pushed to move by the pressure difference at the inlet and outlet of the gas meter, under the action of the pressure difference, the diaphragm continuously moves alternately, the two valve covers are pushed to continuously discharge the gas filled in the metering chambers to the gas outlet of the gas meter, and the metering system is connected with a counter through a mechanical transmission mechanism, so that the volume metering of the gas passing through the diaphragm gas meter is realized. The membrane gas meters commonly used at home and abroad at present are G2.5 membrane gas meters, and the G2.5 membrane gas meters can meter the gas with the flow rate in the range of 0.025-4 square meters per hour; the rotation volume of the existing G2.5 membrane gas meter is 1.2L, so that the performance requirement specified by the membrane gas meter standard can be met, the existing gas meter is large in volume, poor in structural aging and poor in matching performance of a flow channel, the pressure loss of the existing G2.5 membrane gas meter is 210-220Pa, therefore, the pressure loss value of the existing G2.5 membrane gas meter is close to the maximum allowable value 200Pa of the pressure loss specified by the membrane gas meter GB/T6968-2011, the maximum allowable value of the pressure loss not meeting the membrane gas meter standard is not met, and the measurement accuracy, the measurement stability and the measurement repeatability of the membrane gas meter are poor, so that the product quality of the existing membrane gas meter is poor.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a G2.5 film type gas meter, which solves the technical problem that the G2.5 film type gas meter cannot be manufactured by using a movement with the rotation volume of 0.8L at present; the technical problems of large volume, ageing structure, poor matching property of the flow channel, large pressure loss and the like of the conventional mode gas meter are solved.
The technical scheme of the invention is as follows: the G2.5 diaphragm gas meter comprises a mounting shell, wherein a gas inlet and a gas outlet are formed in the mounting shell, a movement is mounted in the mounting shell and comprises a movement body, a first metering shell and a second metering shell, a first bellows and a second bellows are arranged on the movement body, the first bellows and the first metering shell, the second bellows and the second metering shell respectively form a first chamber and a second chamber, a first diaphragm and a second diaphragm are respectively arranged between the first bellows and the first metering shell, between the second bellows and the second metering shell, and the first diaphragm divides the first chamber into an A metering chamber and a B metering chamber which are mutually independent, the second diaphragm divides the second chamber into a C metering chamber and a D metering chamber which are mutually independent, and the tops of the first metering shell and the second metering shell are respectively provided with a first opening communicated with the A metering chamber and a fourth opening communicated with the D metering chamber; the top of the machine core body is provided with a flow channel structure, a vertical shaft fixing pipe which is respectively communicated with the first leather diaphragm box and the second leather diaphragm box is arranged on the side wall of the machine core body, which is vertical to the leather diaphragm, the vertical shaft fixing pipe is positioned at one end of the flow channel structure, the other end of the flow channel structure is provided with an air outlet structure, and a fixing column is arranged above the flow channel structure and near the air outlet; the flow channel structure comprises a gas distribution flow channel and a gas outlet flow channel, wherein the cross sections of the gas distribution flow channel and the gas outlet flow channel are of a hexagonal structure formed by overlapping any side of a rectangle with the longer bottom edge of an isosceles trapezoid, the gas outlet flow channel comprises a first square section and a first trapezoid section, the end head of the first trapezoid section is communicated with the gas outlet structure, the side wall at the end head of the first square section is fixed at a position close to a vertical shaft fixing pipe, and the two side walls of the first square section are attached to the side wall parallel to a leather membrane at the top of a machine core; the air distribution flow passage comprises a second square section and a second trapezoid section, the side wall at the end of the second square section is connected with the outer side wall of the vertical shaft fixing pipe, and the second square section is embedded into the side wall at the end of the first square section; a supporting plate connected with the side wall at the end of the first trapezoid is arranged on the side wall at the end of the second trapezoid, the top surface of the supporting plate is level with the top surfaces of the second trapezoid and the first trapezoid, and a suspension structure is arranged right below the supporting plate; a partition plate is arranged in the air distribution flow passage, the partition plate divides the air distribution flow passage into a second opening communicated with the metering chamber B and a third opening communicated with the metering chamber C, and the second opening and the third opening are bilaterally symmetrical relative to the partition plate; the top of the machine core body is provided with a valve grid through a fixing mechanism, and two valve covers are fixed on the valve grid through guide rails fixed at two ends of the valve grid; the two vertical shaft fixing pipes are respectively provided with a vertical shaft connected with the first leather film and the second leather film through folded plates, the other end of the vertical shaft is connected with a transmission mechanism, an error transmission mechanism is further arranged in the transmission mechanism, and the transmission mechanism is connected with two valve covers.
Further, the length of the longer bottom edge of the second trapezoid section is 21-24.5 mm, the length of the shorter bottom edge of the second trapezoid section is 14.5-15.5 mm, and the length of the partition plate is 32.5-34 mm; the length of the two side walls of the second square section is 15.5-16.5 mm; the distance between the intersection point of the shorter bottom edge of the second trapezoid segment and the inclined edge of the second trapezoid segment and the intersection point of the longer bottom edge of the first trapezoid segment positioned on the same side and the inclined edge of the first trapezoid segment is 14-15 mm.
Further, the first opening and the fourth opening are rectangular structures, the lengths of the first opening and the fourth opening are 35-36.5 mm, and the widths of the first opening and the fourth opening are 7-8 mm.
Further, the fixing mechanism comprises two positioning blocks and a fixing hole positioned on the supporting plate, and the two positioning blocks are respectively positioned at the junction of the two side walls of the second square section and the side wall at the end head of the first square section.
Further, the air outlet structure is approximately in a three-way pipe structure, the three-way pipe structure comprises an inlet end and two outlet ends, the inlet end is communicated with the end head of the first trapezoid section, any one of the two outlet ends serves as an air outlet, and the other outlet end is provided with a sealing cover.
Further, the fixed column is 2, and two fixed columns are located the lateral wall department that is close to core top respectively, are equipped with the supporting shoe between two fixed columns, and the supporting shoe is fixed on the lateral wall of structure of giving vent to anger.
Further, the valve grating comprises a valve grating body and a fixed block, the valve grating body is of a cuboid structure, an A channel, a first public channel, a B channel, a separation area, a C channel, a second public channel and a D channel are sequentially arranged on the valve grating body along the extending direction of a long side, the A channel, the first public channel, the B channel, the C channel, the second public channel and the D channel are communicated with the top and the bottom of the valve grating body, the A channel, the B channel, the C channel and the D channel are used for being communicated with a first opening, a second opening, a third opening and a fourth opening in one-to-one correspondence, the first public channel and the second public channel are communicated with an air outlet flow channel, the fixed block is integrally formed with the valve grating body and is positioned on the side wall of the valve grating body, and the bottom of the fixed block is flush with the bottom of the valve grating body; the middle lower part of the A channel and the D channel are respectively connected with an A channel lengthening section and a D channel lengthening section, the A channel lengthening section and the D channel lengthening section are positioned on one side of the fixed block, and a first lengthening section and a second lengthening section which are communicated with one end of the first public channel and one end of the second public channel are respectively arranged at the position of the fixed block close to the bottom.
Further, the tops of the channel A, the channel B, the channel C and the channel D are all provided with the same trapezoid openings, the length of one parallel side of each trapezoid opening is 32.5-33 mm, and the length of the other parallel side of each trapezoid opening is 33.8-34.2mm; the width between two parallel sides of the trapezoid opening is 6.2 mm-6.4 mm, the tops of the first public channel and the second public channel are rectangular openings, the length of each rectangular opening is 33.8 mm-34.2 mm, and the width of each rectangular opening is 12.5 mm-12.7 mm.
Further, the length of the valve cover opening is 31.5 mm-33.5 mm, and the width of the valve cover opening is 12.5 mm-13.5 mm.
In the invention, the movement is arranged in the installation device, the outlet end of the air outlet structure on the movement body is aligned with the gas outlet, when the gas inlet passes through the gas, the valve grating and the valve cover are mutually matched to sequentially charge and discharge the four metering chambers, so that the leather film between the metering chambers is subjected to pressure difference generated in the movement process of the gas in the movement body, the leather film is pushed to do linear reciprocating motion, the leather film moves to drive the vertical shaft connected with the leather film through the folded plate to move, the vertical shaft is connected with the transmission mechanism, the vertical shaft drives the transmission mechanism to do rotary motion, the transmission mechanism drives the transmission mechanism to be connected with the valve cover, and the transmission mechanism drives the valve cover to do reciprocating motion on the guide rail to continuously charge and discharge the four metering chambers, so that the gas is continuously metered.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the revolution volume of the G2.5 diaphragm gas meter is 0.8L, and the diaphragm gas meter with the revolution volume of 0.8L realizes the accurate detection function of the gas flow in the range of 0.025-4 square meters per hour by virtue of the design and improvement of the flow structure and the valve grating, so that the performance index specified by the national standard of the diaphragm gas meter is satisfied; the improvement of the structure of the flow channel ensures that the structure of the machine core is more reasonable, the flow channel matching performance is better, the volume of the G2.5 film type gas meter is one half of that of the existing G2.5 film type gas meter, the cost of packing, transporting and storing the gas meter is reduced, the cost of parts for producing the gas meter is greatly reduced, and the assembly and detection cost of the gas meter is reduced.
(2) The air outlet structure is designed into a three-way pipe structure, so that the air outlet structure is provided with two outlet ends, one outlet end can be arbitrarily selected as an air outlet, and then the other outlet end is provided with the sealing cover, so that different outlet ends can be selected as the air outlets according to the positions of the air outlets of the installation shell, and the applicability of the machine core is better; and the gas outlet structure is arranged on the machine core body, so that the strength of the gas outlet structure is better, the condition that gas leakage occurs in the gas meter due to deformation of the gas outlet is avoided, and the metering accuracy of the G2.5 diaphragm gas meter is ensured.
(3) According to the invention, the valve grid is accurately positioned before being fixed on the machine core through the positioning block, the situation that the opening on the valve grid is inaccurate in correspondence or gaps appear between the opening on the valve grid and the first opening to the fourth opening is avoided, the valve grid is initially fixed through the positioning block, and the valve grid is prevented from being offset or tilted when being fixed, so that the valve grid can be accurately and tightly fixed on the machine core, and the metering accuracy of the non-gas meter is ensured.
(4) According to the invention, through improving the valve grid structure, the A channel lengthening section, the D channel lengthening section, the first lengthening section and the second lengthening section are respectively arranged, so that the lengths of the middle lower parts of the A channel, the D channel, the first public channel and the second public channel are lengthened, fuel gas enters from the top of the channel and flows out from the bottom of the channel, the length of the bottom of the channel is lengthened, the cross section area of the bottom of the channel is increased, the pressure loss of the fuel gas can be reduced, the pressure loss value in the invention is 160-170 Pa, the requirement that the maximum pressure loss allowable value specified in a diaphragm gas meter GB/T6968-2011 is 200Pa is met, and the product quality, the stability and the repeatability of fuel gas metering of the invention are ensured.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a front view of the movement of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic diagram of the movement with the transmission mechanism removed.
Fig. 5 is a schematic cross-sectional view of the movement with the transmission mechanism removed in accordance with the present invention.
Fig. 6 is a top view of a valve gate in accordance with the present invention.
Fig. 7 is a bottom view of the valve gate of the present invention.
Fig. 8 is a schematic cross-sectional view of a valve gate according to the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, 2, 3, 4 and 5, the invention comprises a mounting shell 1, wherein a gas inlet 2 and a gas outlet 3 are arranged on the mounting shell 1, a movement is arranged in the mounting shell 1, the movement comprises a movement body 6, a first metering shell 4 and a second metering shell 5, a first bellows 7 and a second bellows 8 are arranged on the movement body 6, the first bellows 7 and the first metering shell 4, the second bellows 8 and the second metering shell 5 respectively form a first chamber and a second chamber, a first leather film 34 and a second leather film 35 are respectively arranged between the first bellows 7 and the first metering shell 4, between the second bellows 8 and the second metering shell 5, the first leather film 34 divides the first chamber into an independent A metering chamber 9 and an independent B metering chamber 10, the second leather film 35 divides the second chamber into an independent C metering chamber 11 and an independent D metering chamber 12, a first opening 13 communicated with the A metering chamber 9 and a fourth opening 14 communicated with the D metering chamber 12 are respectively arranged at the top of the first metering shell 4 and the second metering shell 5; the top of the machine core body 6 is provided with a flow channel structure 17, the side wall of the machine core body 6 vertical to the leather diaphragm is provided with a vertical shaft fixing pipe 15 which is respectively communicated with the first leather diaphragm box 7 and the second leather diaphragm box 8, and the vertical shaft fixing pipe 15 is used for installing a vertical shaft 16; the vertical shaft fixing pipe 15 is positioned at one end of the flow channel structure 17, the other end of the flow channel structure 17 is provided with an air outlet structure 18, the air outlet structure 18 discharges fuel gas which is metered in the movement, and a fixing column 19 is arranged above the flow channel structure 17 and near the air outlet, and the fixing column 19 is used for fixing the transmission mechanism; the flow channel structure 17 comprises a gas distribution flow channel 17a and a gas outlet flow channel 17b, wherein the cross sections of the gas distribution flow channel 17a and the gas outlet flow channel 17b are hexagonal structures formed by overlapping any side of a rectangle with the longer bottom side of an isosceles trapezoid; the air outlet flow passage 17b comprises a first square section and a first trapezoid section, the end head of the first trapezoid section is communicated with the air outlet structure 18, the side wall at the end head of the first square section is fixed at a position close to the vertical shaft fixing pipe 15, and the two side walls of the first square section are attached to the side wall parallel to the leather film at the top of the machine core 6; the air distribution flow passage 17a comprises a second square section and a second trapezoid section, the side wall at the end of the second square section is connected with the outer side wall of the vertical shaft fixing pipe 15, and the second square section is embedded in the side wall at the end of the first square section; the runner structure 17 is arranged in such a way that when the revolution volume of the diaphragm gas meter is 0.8L, the performance requirement specified in the diaphragm gas meter GB/T6968-2011 can be met, and the gas metering function with the flow in the range of 0.025-4 square meters/h can still be realized when the revolution volume of the diaphragm gas meter is 0.8L; under the condition of meeting the performance standard of the G2.5 film type gas meter, the volume of the G2.5 film type gas meter is minimized, which is about one half of the volume of the existing G2.5 film type gas meter, so that the cost of parts, packaging, transportation and storage of the gas meter is minimized, the matching performance of the flow channel structure 17 is strong, and the applicability is wider; a supporting plate 20 connected with the side wall at the end of the first trapezoid is arranged on the side wall at the end of the second trapezoid, the top surface of the supporting plate is flush with the tops of the end of the second trapezoid and the end of the first trapezoid, and a suspension structure is arranged below the supporting plate 20, so that an air outlet flow channel meets the standard of the G2.5 diaphragm gas meter; the support plate 20 is used for fixing the valve gate 21 and the transmission mechanism; a partition plate 22 is arranged in the air distribution flow passage 17a, the partition plate 22 divides the air distribution flow passage 17a into a second opening 23 communicated with the B metering chamber 10 and a third opening 24 communicated with the C metering chamber 11, and the second opening 23 and the third opening 24 are bilaterally symmetrical relative to the partition plate 22; the valve grid 21 is arranged on the top of the machine core 6 through a fixing mechanism, after the valve grid 21 is fixed, the valve grid 21 and the first opening 13 to the fourth opening 14 are sealed through glue, so that the problem of air leakage is avoided; the two valve caps 25 are fixed on the valve grid 21 through the guide rails 33 fixed at the two ends of the valve grid 21, so that the two valve caps 25 do linear reciprocating motion only, the guide rails 33 can ensure that the positions of the valve caps 25 cannot deviate in the motion process, and the gas distribution accuracy of the metering chamber is good; the two vertical shaft fixing pipes 15 are respectively provided with a vertical shaft 16 connected with a first leather film 34 and a second leather film 35 through folded plates, the other end of the vertical shaft 16 is connected with a transmission mechanism, and an error adjusting mechanism is also arranged in the transmission mechanism; the transmission mechanism is connected with two valve covers 25; the transmission mechanism comprises a rocker arm 26 connected with the vertical shaft 16, and the other end of the rocker arm 26 is connected with a connecting rod 27; the other end of the connecting rod 27 is connected with an error adjusting mechanism 28, the error adjusting mechanism 28 is arranged on a bracket 29, one end of the bracket 29 is fixed on the fixed column 19, and the other end of the bracket 29 is fixed on the valve cover 25; thus, the error adjusting mechanism 28 can adjust the accuracy of the valve cover in the valve grid air distribution; because the first leather film 34 and the second leather film 35 are subjected to the action of pressure difference generated by the fuel gas, the first leather film 34 and the second leather film 35 do reciprocating motion, the first leather film 34 and the second leather film 35 drive the vertical shaft 16 to move, the vertical shaft 16 drives the error adjusting mechanism 28 and the bracket 29 to rotate, meanwhile, the one-way counter counts, the bracket 29 drives the valve cover 25 to move for gas distribution, and the accurate volume measurement of the fuel gas flow of the diaphragm gas meter is realized.
Referring to fig. 5, the length of the longer bottom edge of the second trapezoid segment is 21-24.5 mm, the length of the shorter bottom edge of the second trapezoid segment is 14.5-15.5 mm, and the length of the partition board is 32.5-34 mm; the length of two side walls of the second square section is 15.5-16.5 mm; the distance between the intersection point of the shorter bottom edge in the second trapezoid segment and the inclined edge in the second trapezoid segment and the intersection point of the longer bottom edge in the first trapezoid segment positioned on the same side and the inclined edge in the first trapezoid segment is 14-15 mm; the first opening 13 and the fourth opening 14 are rectangular structures, the length of the first opening 13 and the fourth opening 14 is 35-36.5 mm, and the width is 7-8 mm. The arrangement of the flow channel structure 17 can meet the requirements of the first to fourth openings 14 in the invention on air intake and exhaust, so that the diaphragm type gas meter with the revolution volume of 0.8L can realize the metering of fuel gas with the flow rate of more than 4 square meters per hour, the flow channel structure 17 in the invention is optimal under the condition that the invention meets the performance standard, the volume of the invention is minimized, the cost of parts, packaging, transportation, storage, installation, overhaul and the like of products is reduced, the air outlet flow channel starts from the connection position of the side wall of the second square section and the bevel edge of the second trapezoid section, the width of the air outlet flow channel is increased, the pressure loss in the gas metering process is reduced, and the product quality, the metering stability, the accuracy and the repeatability of the invention are ensured.
Referring to fig. 4, the fixing mechanism includes two positioning blocks 30 and a fixing hole 31 located on the supporting plate 20, the fixing hole 31 is a blind hole, and the two positioning blocks 30 are respectively located at the junction of two side walls of the second square section and the side wall at the end of the first square section; according to the invention, the positioning is performed before the valve grid 21 is fixed on the machine core 6 through the positioning block 30, the situation that the opening on the valve grid 21 is inaccurate in correspondence with the first opening 13 to the fourth opening 14 or gaps appear is avoided, the valve grid 21 is initially fixed through the positioning block 30, and the valve grid 21 is prevented from being offset or tilted when being fixed, so that the valve grid 21 can be accurately and tightly fixed on the machine core 6, and the metering accuracy of a gas meter is ensured.
Referring to fig. 4, the air outlet structure 18 is generally a three-way pipe structure, and the three-way pipe structure includes an inlet end and two outlet ends, wherein the inlet end is communicated with the end of the first trapezoid segment, any one of the two outlet ends is used as an air outlet, and the other outlet end is provided with a sealing cover 36; the air outlet structure 18 is provided with two outlet ends, one outlet end can be selected as an air outlet at will, and then the other outlet end is provided with the sealing cover 36, so that different outlet ends can be selected as the air outlets according to the position of the air outlet of the installation shell 1, and the applicability of the machine core 6 in the invention is better; and the air outlet structure 18 is arranged on the machine core 6, so that the strength of the air outlet structure 18 is better, the condition that the air outlet deforms to cause air leakage in the gas meter is avoided, and the metering accuracy of the G2.5 diaphragm type gas meter is ensured.
The number of the fixing columns 19 is 2, the two fixing columns 19 are respectively positioned at the side wall close to the top of the machine core body 6, a supporting block 32 is arranged between the two fixing columns 19, and the supporting block 32 is fixed on the outer side wall of the air outlet structure 18; the strength of the fixed column 19 is ensured, the fixed column 19 is prevented from being deformed under the influence of external force and temperature when being used for a long time, the stability of the fixed column is ensured to be better, the error caused by the whole transmission system is avoided to influence the valve grid 21 and the valve cover 25 to perform air distribution work, and the good metering precision of the invention is ensured.
Referring to fig. 6, 7 and 8, the valve grating 21 includes a valve grating body 211 and a fixing block 212, the valve grating body 211 is in a substantially rectangular parallelepiped structure, the valve grating body 211 is sequentially provided with an a channel 37, a first common channel 38, a B channel 39, a partition 40, a C channel 41, a second common channel 42 and a D channel 43 along the extending direction of the long side, the a channel 37, the first common channel 38, the B channel 39, the C channel 41, the second common channel 42 and the D channel 43 are communicated with the top and the bottom of the valve grating body 211, the a channel 37, the B channel 39, the C channel 41 and the D channel 43 are used for being communicated with the first opening 13, the second opening 23, the third opening 24 and the fourth opening 14 in a one-to-one correspondence, the first common channel 38 is communicated with the second common channel 40 and the air outlet flow channel 17B, and the bottom surface of the valve grating body 211 is matched with the flow channel structure 17 in structure and size; the fixed block 212 is integrally formed with the valve gate body 211 and is positioned on the side wall of the valve gate body 211, the bottom of the fixed block 212 is flush with the bottom of the valve gate body 211, and the shape of the fixed block 212 is matched with the shape of the supporting plate 20; the middle lower parts of the A channel 37 and the D channel 43 are respectively connected with an A channel lengthening section 44 and a D channel lengthening section 45, the A channel lengthening section 44 and the D channel lengthening section 45 are positioned on one side of the fixed block 212, and a first lengthening section 46 and a second lengthening section 47 which are communicated with one end of the first common channel 38 and one end of the second common channel 40 are respectively arranged at the position of the fixed block 212 close to the bottom. According to the invention, through improving the valve gate structure, the length of the middle lower part of the A channel lengthening section 44, the D channel lengthening section 45, the first lengthening section 46 and the second lengthening section 47 is respectively arranged, so that the lengths of the middle lower part of the A channel 37, the D channel 43, the first public channel 38 and the second public channel 40 are lengthened, fuel gas enters from the top of the channel and flows out from the bottom of the channel, the length of the bottom of the channel is lengthened, the cross-sectional area of the bottom of the channel is increased, the pressure loss of the fuel gas can be reduced, the pressure loss value in the invention is 160-170 Pa, the requirement of the maximum pressure loss allowable value specified in a diaphragm gas meter GB/T6968-2011 is met, the product quality of the invention is ensured, the stability and repeatability of fuel gas metering of the invention are ensured, and on the other hand, the contact area between the valve gate body and the flow channel structure is increased, the stability and the sealing performance of bonding the valve gate body on the flow channel structure through glue are better, and the occurrence of gas leakage and inaccurate metering condition is prevented.
The tops of the channel A37, the channel B39, the channel C41 and the channel D43 are all provided with identical trapezoid openings, the length of one parallel side of each trapezoid opening is 32.5-33 mm, and the length of the other parallel side of each trapezoid opening is 33.8-34.2 mm; the width between two parallel sides of the trapezoid opening is 6.2 mm-6.4 mm, the tops of the first public channel 38 and the second public channel 40 are rectangular openings, the length of each rectangular opening is 33.8 mm-34.2 mm, the width of each rectangular opening is 12.5 mm-12.7 mm, the length of each valve cover opening is 31.5 mm-33.5 mm, and the width of each valve cover opening is 12.5 mm-13.5 mm; the length of the valve grating and the valve cover is increased, so that the gas flow entering the machine core meets the air inlet requirement of the invention, the gas metering accuracy of the invention is more accurate, and the good product performance of the gas meter is ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The G2.5 diaphragm gas meter comprises a mounting shell, wherein a gas inlet and a gas outlet are formed in the mounting shell, a movement is mounted in the mounting shell and comprises a movement body, a first metering shell and a second metering shell, a first bellows and a second bellows are arranged on the movement body, the first bellows and the first metering shell, the second bellows and the second metering shell respectively form a first chamber and a second chamber, a first diaphragm and a second diaphragm are respectively arranged between the first bellows and the first metering shell, between the second bellows and the second metering shell, and the first diaphragm divides the first chamber into an A metering chamber and a B metering chamber which are mutually independent, the second diaphragm divides the second chamber into a C metering chamber and a D metering chamber which are mutually independent, and the tops of the first metering shell and the second metering shell are respectively provided with a first opening communicated with the A metering chamber and a fourth opening communicated with the D metering chamber; the method is characterized in that: the top of the machine core body is provided with a flow channel structure, a vertical shaft fixing pipe which is respectively communicated with the first leather diaphragm box and the second leather diaphragm box is arranged on the side wall of the machine core body, which is vertical to the leather diaphragm, the vertical shaft fixing pipe is positioned at one end of the flow channel structure, the other end of the flow channel structure is provided with an air outlet structure, and a fixing column is arranged above the flow channel structure and near the air outlet; the flow channel structure comprises a gas distribution flow channel and a gas outlet flow channel, wherein the cross sections of the gas distribution flow channel and the gas outlet flow channel are of a hexagonal structure formed by overlapping any side of a rectangle with the longer bottom edge of an isosceles trapezoid, the gas outlet flow channel comprises a first square section and a first trapezoid section, the end head of the first trapezoid section is communicated with the gas outlet structure, the side wall at the end head of the first square section is fixed at a position close to a vertical shaft fixing pipe, and the two side walls of the first square section are attached to the side wall parallel to a leather membrane at the top of a machine core; the air distribution flow passage comprises a second square section and a second trapezoid section, the side wall at the end of the second square section is connected with the outer side wall of the vertical shaft fixing pipe, and the second square section is embedded into the side wall at the end of the first square section; a supporting plate connected with the side wall at the end of the first trapezoid is arranged on the side wall at the end of the second trapezoid, the top surface of the supporting plate is level with the top surfaces of the second trapezoid and the first trapezoid, and a suspension structure is arranged right below the supporting plate; a partition plate is arranged in the air distribution flow passage, the partition plate divides the air distribution flow passage into a second opening communicated with the metering chamber B and a third opening communicated with the metering chamber C, and the second opening and the third opening are bilaterally symmetrical relative to the partition plate; the top of the machine core body is provided with a valve grid through a fixing mechanism, and two valve covers are fixed on the valve grid through guide rails fixed at two ends of the valve grid; the two vertical shaft fixing pipes are respectively provided with a vertical shaft connected with the first leather film and the second leather film through folded plates, the other end of the vertical shaft is connected with a transmission mechanism, an error transmission mechanism is further arranged in the transmission mechanism, and the transmission mechanism is connected with two valve covers.
2. The G2.5 diaphragm gas meter of claim 1, wherein: the length of the longer bottom edge of the second trapezoid segment is 21-24.5 mm, the length of the shorter bottom edge of the second trapezoid segment is 14.5-15.5 mm, and the length of the partition board is 32.5-34 mm; the length of the two side walls of the second square section is 15.5-16.5 mm; the distance between the intersection point of the shorter bottom edge of the second trapezoid segment and the inclined edge of the second trapezoid segment and the intersection point of the longer bottom edge of the first trapezoid segment positioned on the same side and the inclined edge of the first trapezoid segment is 14-15 mm.
3. The G2.5 diaphragm gas meter of claim 1, wherein: the first opening and the fourth opening are rectangular structures, the lengths of the first opening and the fourth opening are 35-36.5 mm, and the widths of the first opening and the fourth opening are 7-8 mm.
4. The G2.5 diaphragm gas meter of claim 1, wherein: the fixing mechanism comprises two positioning blocks and a fixing hole positioned on the supporting plate, and the two positioning blocks are respectively positioned at the junction of the two side walls of the second square section and the side wall at the end head of the first square section.
5. The G2.5 diaphragm gas meter of claim 1, wherein: the three-way pipe structure comprises an inlet end and two outlet ends, wherein the inlet end is communicated with the end head of the first trapezoid section, any one of the two outlet ends is used as an air outlet, and the other outlet end is provided with a sealing cover.
6. The G2.5 diaphragm gas meter of claim 1, wherein: the fixed column is 2, and two fixed columns are located the lateral wall department that is close to core top respectively, are equipped with the supporting shoe between two fixed columns, and the supporting shoe is fixed on the lateral wall of structure of giving vent to anger.
7. The G2.5 diaphragm gas meter of claim 1, wherein: the valve grating comprises a valve grating body and a fixed block, wherein the valve grating body is of a cuboid structure, an A channel, a first public channel, a B channel, a separation area, a C channel, a second public channel and a D channel are sequentially arranged on the valve grating body along the extending direction of a long side, the A channel, the first public channel, the B channel, the C channel, the second public channel and the D channel are communicated with the top and the bottom of the valve grating body, the A channel, the B channel, the C channel and the D channel are used for being communicated with a first opening, a second opening, a third opening and a fourth opening in one-to-one correspondence, the first public channel and the second public channel are communicated with an air outlet flow channel, the fixed block is integrally formed with the valve grating body and is positioned on the side wall of the valve grating body, and the bottom of the fixed block is flush with the bottom of the valve grating body; the middle lower part of the A channel and the D channel are respectively connected with an A channel lengthening section and a D channel lengthening section, the A channel lengthening section and the D channel lengthening section are positioned on one side of the fixed block, and a first lengthening section and a second lengthening section which are communicated with one end of the first public channel and one end of the second public channel are respectively arranged at the position of the fixed block close to the bottom.
8. The G2.5 diaphragm gas meter of claim 7, wherein: the tops of the channel A, the channel B, the channel C and the channel D are all provided with identical trapezoid openings, the length of one parallel side of each trapezoid opening is 32.5-33 mm, and the length of the other parallel side of each trapezoid opening is 33.8-34.2 mm; the width between two parallel sides of the trapezoid opening is 6.2 mm-6.4 mm, the tops of the first public channel and the second public channel are rectangular openings, the length of each rectangular opening is 33.8 mm-34.2 mm, and the width of each rectangular opening is 12.5 mm-12.7 mm.
9. The G2.5 diaphragm gas meter of claim 7, wherein: the length of the valve cover opening is 31.5-33.5 mm, and the width of the valve cover opening is 12.5-13.5 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610704825.0A CN106123987B (en) | 2016-08-23 | 2016-08-23 | G2.5 diaphragm type gas table |
| PCT/CN2017/098671 WO2018036525A1 (en) | 2016-08-23 | 2017-08-23 | G2.5 membrane-type gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610704825.0A CN106123987B (en) | 2016-08-23 | 2016-08-23 | G2.5 diaphragm type gas table |
Publications (2)
| Publication Number | Publication Date |
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| CN106123987A CN106123987A (en) | 2016-11-16 |
| CN106123987B true CN106123987B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610704825.0A Active CN106123987B (en) | 2016-08-23 | 2016-08-23 | G2.5 diaphragm type gas table |
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| Country | Link |
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| CN (1) | CN106123987B (en) |
| WO (1) | WO2018036525A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123987B (en) * | 2016-08-23 | 2023-08-08 | 德国埃尔斯特公司 | G2.5 diaphragm type gas table |
| CN106595792A (en) * | 2017-01-16 | 2017-04-26 | 上海真兰仪表科技股份有限公司 | Small high-precision membrane type gas meter |
| CN108844593B (en) * | 2018-08-23 | 2024-01-26 | 上海真兰仪表科技股份有限公司 | High-safety high-reliability small-sized diaphragm gas meter |
| CN108760193B (en) * | 2018-09-05 | 2023-06-30 | 成都秦川物联网科技股份有限公司 | Rocker positioning structure, gas meter movement tightness detection device and method |
| CN110793588B (en) * | 2019-11-19 | 2022-07-05 | 重庆前卫表业有限公司 | Direct drive set and method of assembling same |
| CN112985531A (en) * | 2021-02-07 | 2021-06-18 | 上海飞奥燃气设备有限公司 | Skin membrane gas table |
| CN114018351B (en) * | 2021-10-20 | 2024-01-23 | 新郦璞科技(上海)有限公司 | Electronic diaphragm gas meter metering system based on eddy current induction principle |
| CN114102127B (en) * | 2021-11-20 | 2023-04-18 | 重庆前卫表业有限公司 | Automatic production line for movement of diaphragm gas meter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106123987A (en) | 2016-11-16 |
| WO2018036525A1 (en) | 2018-03-01 |
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Effective date of registration: 20200821 Address after: Mainz Castile, Germany Applicant after: Elster, Germany Address before: 401121 No. 69, Mount Huangshan Avenue, Yubei District, Chongqing Applicant before: QIANWEI KROMSCHRODER METERS (CHONGQING) Co.,Ltd. |
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