CN201034662Y - Passive correction of temperature gas gage table - Google Patents
Passive correction of temperature gas gage table Download PDFInfo
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- CN201034662Y CN201034662Y CNU2006200365482U CN200620036548U CN201034662Y CN 201034662 Y CN201034662 Y CN 201034662Y CN U2006200365482 U CNU2006200365482 U CN U2006200365482U CN 200620036548 U CN200620036548 U CN 200620036548U CN 201034662 Y CN201034662 Y CN 201034662Y
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Abstract
The utility model discloses a passive temperature correction gas meter, which is a membrane structure, comprising a core membrane, a rocker arm, a rocker and a linking rod. The both ends of the linking rod are respectively connected with the rocker arm and the rocker. The utility model is characterized in that a temperature compensation device is also included. The temperature compensation device is connected with the core membrane through the rocker arm or the rocker the length of which can change. The meter does not adopt electronic technology but whole mechanical structure, which can realize that in a large temperature variation range, the continuous volume measurement can be corrected to standard measurement volume. The technology realizes the solution of the problem that in the real atmospheric environment, the gas meter can be impacted by the measurement error temperature. Simultaneously the technology can be realized in all the membrane gas meters. The utility model has the advantages of simple structure, easy manufacture, simple debugging, continuous correction, wide correction range and same measurement accuracy after correction as the common gas meter.
Description
Technical field
The utility model relates to a kind of gas meter, is specifically related to a kind of passive continuous temperature volume correction diaphragm gas gauging table.
Background technology
The diaphragm gas gauging table is the domestic gas measuring instrument of present whole world use amount maximum, existing more than 100 year of its developing history, the diaphragm gas gauging table is because it is simple in structure, service condition is less demanding, working condition is simple, measuring accuracy is higher, broad quantum, and therefore countries in the world are all producing in a large number and using now.But the measuring accuracy of diaphragm gas gauging table is affected by environment very big, particularly environment for use temperature and gas pressure change.The measuring accuracy of diaphragm gas gauging table is examined and determine under various countries' specified standard condition, and therefore, when actual environment for use and standard conditions were inconsistent, its measuring accuracy was also different.
In actual use, the measuring accuracy of diaphragm gas gauging table can not considered the gaseous tension influence, because the gaseous tension of registering one's residence of gas company is through being transported in the user family after voltage adjusting device pressure regulation and the constant voltage, by gas meter metering, therefore the pressure through gas meter is in steady state substantially then.Even gaseous tension is inconsistent when pressure and gas meter calibrating, suitable and the measuring accuracy when this calibrating pressure of the measuring accuracy of its gas meter, it can often not change, also be a fixing precision (even inconsistent) with the precision in when calibrating, gas company can calculate accurately and analyze the combustion gas error by this calculating, therefore there is no need to carry out pressure correction, waste resource and increase combustion gas user buy the financial burden of gas meter.
In actual use, the measuring accuracy of diaphragm gas gauging table must be considered the gas temperature influence, because before combustion gas enters the user, one section very long pipeline is arranged, this pipeline is directly and is exposed to airborne, therefore the temperature of this pipeline changes with the variation of environment temperature, and the gas temperature in the pipeline also changes with the variation of pipe temperature, and the gas temperature that enters gas meter also changes with the variation of pipe temperature.The temperature of gas is not constant, changes at any time, and just the gas that changes at any time of temperature measures by gas meter.Gas temperature is inconsistent when the gas temperature of gas meter actual metered and calibrating, and changes at any time, so gas meter error in dipping in actual use is non-constant, and it is continually varying with the variation of gas temperature.So gas company cannot calculate accurately and analyze the combustion gas error by any one measuring accuracy, therefore must carry out the correction of temperature volume to gas meter, realize combustion gas both sides of supply and demand interests equality.
Simultaneously, the combustion gas that gas company is bought is measured by large-scale measuring instrument, and its measuring accuracy is by the correction of electronic type temperature and pressure, and what metering reflected is the gas volume of standard.The domestic gas gauging table is not because the restriction of price factor has the temperature and pressure correction, and what metering reflected is not the gas volume of standard, but the gas volume of prevailing condition.Therefore there is the volume metering error in both, and this also is the unequal reasons of combustion gas both sides of supply and demand interests.
How to increase under the condition of cost and the basic structure of utilizing existing diaphragm gas gauging table in little amplitude, increase gas temperature volume correcting device, the metered volume that is implemented in the different temperatures environment is modified to the metered volume of standard verification condition (to call standard conditions in the following text) continuously automatically, thereby guaranteeing combustion gas both sides of supply and demand interests equality, is a problem that presses for solution.
The utility model content
Technical problem to be solved in the utility model is how a kind of no source temperature correction gas meter is provided, and this table does not adopt electronic technology, adopts pure physical construction, can realize that continuous volume metering is adapted to the standard metering volume in big range of temperature.This technology has realized the error in dipping temperature effect problem of gas meter in the real atmosphere environment, can realize on all diaphragm gas gauging tables simultaneously, and is simple in structure, produce easily, debugging is simple, revises continuously, extent of amendment is wide, and it is the same with the general gas gauging table to revise the back measuring accuracy.
The technical matters that the utility model proposed is to solve like this: construct a kind of passive continuous temperature correction gas meter, it is the membrane type structure, comprise movement diaphragm, rocking arm, rocking bar and connecting rod, the connecting rod two ends connect rocking arm and rocking bar respectively, it is characterized in that, also include temperature compensation means, described temperature compensation means can change the extension size of movement diaphragm by the length that changes rocking arm or rocking bar, thereby changes diaphragm revolution volume.
According to passive continuous temperature correction gas meter provided by the utility model, it is characterized in that, described temperature compensation means, it is two rocker structures, comprise fixedly parts such as rocking arm, compensating part, movable rocking arm, gib screw and guider screw, fixedly have chute on the rocking arm, described guider screw and chute flexibly connect, rocking arm and movable rocking arm are rigidly connected with gib screw respectively with fixedly at the two ends of described compensating part, described movable rocking arm one end flexibly connects by guider screw and gib screw, and the other end is connected with connecting rod.
According to passive continuous temperature correction gas meter provided by the utility model, it is characterized in that, described temperature compensation means comprises parts such as rolling disc, slide block, terminal pad, compensating part, described rolling disc connects compensating part and terminal pad, and described terminal pad is connected the back and forms a chute with rolling disc; Described slide block is provided with joint pin, is used for being connected with connecting link, also is connected with compensating part simultaneously, moves in the chute of the distortion of the broken compensating part of slide block between terminal pad and rolling disc.
According to passive continuous temperature correction gas meter provided by the utility model, it is characterized in that described compensating part is the bimetallic strip structure, described bimetallic strip can be with variation of temperature dilatation.
According to passive continuous temperature correction gas meter provided by the utility model, it is characterized in that, as belong to relational structure diaphragm gas gauging table, also be provided with the auxiliary connecting rod structure, described auxiliary connecting rod structure is made of auxiliary rocker arm, auxiliary connecting rod, auxiliary rocker arm one end is connected with the rotation axis hinge, and an end is connected with connecting rod with auxiliary connecting rod, and the other end of auxiliary connecting rod is connected with the crank hinge.
The utility model is the structure at existing diaphragm gas gauging table, the gas meter of developing with passive continuous temperature volume correction volume metering, and it is simple in structure, produce easily, debugging is simple, revises continuously, extent of amendment is wide, and it is the same with the general gas gauging table to revise the back measuring accuracy.
Description of drawings
Fig. 1 is the structural representation of relational structure diaphragm gas gauging table in the prior art;
Fig. 2 is the structural representation of absolute construction diaphragm gas gauging table in the prior art;
Fig. 3 is the principle of work synoptic diagram of diaphragm gas gauging table;
Fig. 4 (Fig. 4 a, Fig. 4 b) is the structural representation of first kind of embodiment of two rocking arm temperature compensation means of the change rocking arm length that provides of the utility model;
Fig. 5 (Fig. 5 a, Fig. 5 b) is the structural representation of second kind of embodiment of two rocking arm temperature compensation means of the change rocking arm length that provides of the utility model;
Fig. 6 (Fig. 6 a, Fig. 6 b) is the structural representation of the third embodiment of two rocking arm temperature compensation means of the change rocking arm length that provides of the utility model;
Fig. 7 is the structural representation of the temperature compensation means of change rocking bar length provided by the utility model;
Fig. 8 is the structural representation that is provided with the gas meter (rotational structure movement) of two rocking arm temperature compensation means provided by the utility model;
Fig. 9 is the structural representation that is provided with the gas meter (to-and-fro movement structure movement) of two rocking arm temperature compensation means provided by the utility model;
Figure 10 is the structural representation of the gas meter (rotational structure movement) of the temperature compensation means of change rocking bar length provided by the utility model;
Figure 11 is the structural representation of the gas meter (to-and-fro movement structure movement) of the temperature compensation means of change rocking bar length provided by the utility model;
Figure 12 is the structural representation of the gas meter of the temperature compensation means that is provided with the auxiliary rocker arm device provided by the utility model.
Wherein, 1; Connecting rod, 2; Connecting rod, 3; Support; 4; Collapser, 5; Rocking arm, 6; Leading truck, 7; Guide post; 8; Crank axle, 9; Rocker, 10; Epithelium, 11; End anti-card; 12; Support, 13; Driven pulley, 14; Transition wheel, 15; Driving wheel; 16; Valve gap, 17; Valve seat, 18; Connecting rod; 19; Fixing rocking arm, 20; Wireway, 21; Turning cylinder; 22; Rocker, 23; Collapser, 24; Collapser; 25; Epithelium, 26; The movement lid, 27; Pressing plate; 28; Rubber cushion, 29; Core body, 30; Rocking arm; 31; Body, 32; Connecting rod, 33; Distant bar; 34; Hinge, 35; Fixing rocking arm, 36; Hold-down screw; 37; Guider screw, 38; Movable rocker arm, 39; Compensating part; 40; Chute, 41; Slide block, 42; Screw; 43; Compensating part, 44; Screw, 45; Rolling disc; 46; Connecting hole, 47; Terminal pad, 48; Joint pin; 49; Distant bar, 50; Auxiliary rocker arm, 51; Back-up ring; 52; Connecting rod, 53; Guide post, 54; Sealing is emitted; 55; Leading truck, 56; Screw, 57; Axle sleeve; 58; Connecting rod, 59; Crank, 60; Crank axle; 61; Crank, 62; Crank axle, 63; Connecting rod.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
Passive continuous temperature correction gas meter provided by the utility model, as Fig. 1, Fig. 2, shown in Figure 3, its principle of work is as follows:
Now a large amount of gas meters that use in the whole world all are the diaphragm gas gauging tables, and its measuring principle all is that gas meter is passed through in combustion gas, promote diaphragm and move back and forth (volume that diaphragm forms), gas is discharged carry out volume metering.Gas meter is a kind of automatic instrument, and its power resources are the gaseous tensions in the tube road, and gas promotes the motion of gas meter interior diaphragm by the pressure differential that forms before and after the gas meter.The motion tape travel motion of mechanism of gas meter interior diaphragm, the motion of gas meter is symmetrically arranged four-bar mechanism, the continuous motion of the mutual motion formation gas meter of two cover four-bar mechanisms.The motion of connecting rod drives counting assembly volume is measured, a week is a metered volume unit (the revolution volume that also claims gas meter) to each diaphragm back and forth, in case design is finished or the gas meter assembling is finished, the metered volume unit of its gas meter (not being quality) is exactly a constant value.Under different condition, quality with volume under the quality of this volume and the standard state is different, that is to say, the metered volume unit of revolution volume reflection was (quality is different) inequality when the metered volume unit of gas meter revolution volume reflection was with standard state in actual environment, just the error in dipping under Fan Ying the different condition.Make the volume amount that under the volume metering quantity of one of the gas meter under the different condition (following only finger ring border temperature conditions) revolution volume projection and standard conditions, reflects identical, must change the revolution volume of gas meter with the difference of environment temperature at any time, the metering that is implemented under any environmental baseline is all consistent with the metering under the standard conditions.The metered volume unit's (quality) that is implemented under the varying environment temperature conditions is identical with standard conditions, must change the size of gas meter revolution volume with the difference of environment temperature, the revolution volume size that reaches gas meter movement motion one week reflection is with to be converted into the standard volume size consistent, thus the correction of realization temperature volume.To change the revolution volume of gas meter with the conversion of environment temperature, can not influence the motion of gas meter again,, can draw to draw a conclusion according to the characteristics of motion of gas meter motion structure and four connecting rods:
(1), four-bar mechanism principle
Under the prerequisite that satisfies the four-bar linkage structure moving condition, can not change the centre of gyration of rocking arm by the length that changes fork or rocking arm, but can change the size of the amplitude of fluctuation of rocking arm.Realize changing the size of rocker amplitude of fluctuation by the size that changes the rocking arm amplitude of fluctuation, change the extension size of movement diaphragm, realize changing the purpose of gas meter revolution volume.。
According to the four-bar mechanism principle, if change the length of connecting rod, will change the position of the rocking arm centre of gyration, can not increase the size of the amplitude of fluctuation of rocking arm, that is to say the extension size that can not change the movement diaphragm; To cause rocker oscillation centre position change simultaneously, change the centre of gyration position of movement diaphragm, cause motion ataxia, and seriously cause and to move.
Therefore, any film gas meter will change the size of revolution volume, does not change robust motion again simultaneously, has only the length by changing fork or rocking arm to realize, can not realize by the length that changes connecting rod.
(2) the diaphragm gas gauging table that does not directly link with four connecting rod rocking arms for the valve gap movement locus is called at this: absolute construction diaphragm gas gauging table.Valve gap does not link to each other with rocking arm, and the motion of valve gap is to be driven by the axe movement of rocking bar, so the motion of the movement locus of valve gap and four-bar mechanism is irrelevant, and the size of rocking arm amplitude of fluctuation is moved with valve gap and had nothing to do.Therefore the gas meter of this kind structure does not need to change its structure, only needs to change the length of rocking arm or fork, just can realize changing the purpose of gas meter revolution volume, does not influence the movement motion simultaneously.Present diaphragm gas gauging table, no matter be iron-clad table or aluminum hull table, basically all be to adopt " absolute construction " form, therefore to realize that for this class gas meter the correction of temperature volume is easily, only need to change the length that the diaphragm degree of depth promptly changes rocking arm or rocking bar and just can realize.
(3) the diaphragm gas gauging table that directly links for valve gap movement locus and four connecting rod rocking arms is called at this: relational structure diaphragm gas gauging table.Connecting rod and valve gap are rigidly connected, and connecting rod links to each other with rocking arm, and the size of rocking arm amplitude of fluctuation has directly determined the track position of valve gap motion.Because the movement position of valve gap on valve seat must not change, otherwise the motion of gas meter will lack of proper care in case debugging is finished, cause gas meter not move and performance decline.
The gas meter of this kind structure will realize that temperature compensation just must change the version that valve gap and the rocking arm of four connecting rods directly link to each other, otherwise after the length of change rocking arm, will influence the relative position of valve gap and valve seat, causes movement ataxia.Therefore, for the gas meter of this kind structure, must change original structure, the auxiliary connecting rod structure of redesign one cover symmetry realizes rocking arm and valve gap motion independent structures form.The auxiliary connecting rod structure is made up of auxiliary rocker arm, auxiliary connecting rod.Auxiliary rocker arm one end is connected with the rotation axis hinge, and an end is connected with connecting rod link with auxiliary connecting rod; Connecting rod one end is connected with the auxiliary rocker arm hinge, and an end and valve gap are rigidly connected; Auxiliary connecting rod one end is connected with the auxiliary rocker arm hinge, and the other end is connected with the crank hinge; Crank is a part of four-bar mechanism, and crank-motion is a circular motion, therefore under the situation that does not change crank length, when the motion of crank drives the auxiliary connecting rod motion, can not change the movement locus position of valve gap.
1, construction design method A: realize temperature compensation with the way that changes rocking arm length
Construction design method A adopts on the basis of existing diaphragm gas gauging table, and with the rocking arm redesign of diaphragm gas gauging table, changing a rocking arm is two rocking arm combinations, and is the version that flexibly connects, and realizes freely elongating or shortening of rocking arm.Freely elongating or shortening of rocking arm is by bimetallic material control in gas meter, flexible reaching by rocking arm changes the variation of gas meter motion of membrane stroke, thereby realize that gas meter revolution volume changes with variation of temperature, realizes the purpose of the temperature volume correction of gas meter in metering process.Concrete structure is just like the form shown in Fig. 4,5,6.Above-mentioned the sort of version no matter all is made up of fixing accessories such as rocking arm 35, compensating part 39, gib screw 36, guider screw 37 and movable rocking arm 38.Below each parts is described:
Fixing rocking arm: fixedly have chute on the rocking arm, be convenient to guider screw along runner movement, guider screw and chute be connected to flexible connection, the end positions of chute has determined the maximum displacement that movable rocking arm moves, fixedly an end with holes and the rotation axis of rocking arm are rigidly connected.
Compensating part: compensating part is to be made by bimetallic material, and its characteristic is dilatation with the variation of environment temperature.Rocking arm and movable rocking arm are rigidly connected with gib screw respectively with fixedly at the compensating part two ends.Move on the dilatation drive activity rocking arm edge of the compensating part fixedly chute of rocking arm.
Gib screw: gib screw adopts standard component, is to be used for fixing being fastenedly connected of rocking arm and movable rocking arm and compensating part.
Guider screw: guider screw passes the via hole of movable rocking arm and the fixing chute of rocking arm, both are linked to each other, and maintenance activity rocking arm can free activity in the chute of fixing rocking arm.The guiding spiral shell plays guiding and is connected.
Movable rocking arm: movable rocking arm one end is by guider screw and fixedly rocking arm flexible connection, and the other end is connected with the connecting rod link of gas meter.Movable rocking arm fixedly moving on the rocking arm, realizes changing the purpose of rocking arm length with the distortion of compensating part.
2, construction design method B: realize temperature compensation with the way that changes rocking bar length
(1) mentality of designing
Construction design method B adopts on the basis of existing diaphragm gas gauging table, rocking bar (being rolling disc) redesign with the diaphragm gas gauging table, change the fixedly connected post of former rolling disc into the flexible connection post, realize flexibly connecting post and under the drive of bimetallic strip, freely elongate or shorten.Change the variation of gas meter motion of membrane stroke by flexible the reaching that flexibly connects post, thereby realize that gas meter revolution volume changes with variation of temperature, realizes the purpose of the temperature volume correction of gas meter in metering process.Concrete structure form as shown in Figure 7.The structure of construction design method B is made up of accessories such as rolling disc 45, slide block 41, terminal pad 47, compensating parts 42, below each parts is described:
Rolling disc: rolling disc just is the rocking bar of gas meter four-bar mechanism, on rolling disc, set up a fulcrum with a certain distance from the position of the rolling disc centre of gyration, and be connected with the connecting rod of four-bar mechanism, just be equivalent to the rocking bar of four-bar mechanism between the fulcrum and the rolling disc centre of gyration.In this mechanism, rolling disc is used for the effect of solid bimetallic strip and terminal pad, and around the purpose of the central shaft gyration of gas meter.
Terminal pad: be used for being connected the back and form a chute, for slide block movement with rolling disc.
Slide block: joint pin is arranged on the slide block, be used for being connected with connecting rod, slide block is connected with compensating part simultaneously.Slide block is with moving in the chute of distortion between terminal pad and rolling disc of compensating part.Distance in the center of slide block joint pin and the rolling disc revolution is exactly the length of rocking bar.
Compensating part: compensating part is to be made by bimetallic material, and its characteristic is dilatation with the variation of environment temperature.The compensating part two ends are rigidly connected with gib screw with slide block and rolling disc respectively.The dilatation of compensating part drives slide block and moves along the chute that forms between rolling disc and the terminal pad.
Specification of the present utility model is as follows:
(1), " absolute construction " diaphragm gas gauging table temperature volume correction design
As previously mentioned, the correction of " absolute construction " diaphragm gas gauging table temperature volume, do not need to change the structure of existing gas meter, the respective accessory that only needs the structure of " construction design method A " or " construction design method B " to be replaced existing gas meter gets final product.Two kinds of frame modes can be realized the purpose of temperature correction, and specific implementation is as follows:
1, adopt " construction design method A " to realize the temperature correction.
Implementation: the rocking arm with above-mentioned " construction design method A " is replaced the rocking arm that has " absolute construction " diaphragm gas gauging table now, realizes temperature compensation.
Cassette mechanism structure: as Fig. 8, shown in Figure 9
Cassette mechanism structure consists of: the movement of the sort of structure no matter all is that the rocking arm that rocking arm with former gas meter movement replaces to " structural design A " forms.Vary with temperature by rocking arm and to elongate or shorten, the rotational angle that changes rocker is realized the variation of epithelium volume, realizes the temperature correction.The figure relevant with the temperature correcting principle sees " construction design method A ".
Operating principle: under the situation that temperature is not too hanged down and pressure is little, the gas of gas meter metering can be shown ideal gas, and the variation of its volume can be analyzed by the desirable equation of gas state.Its formula is: P
1V
1/ T
1=P
2V
2/ T
2Suppose be designated as down 1 be the standard conditions of gas, being designated as 2 down is the residing natural environmental condition of gas meter, supposes that in addition gas meter pressure in metering process is constant, is V with simplified formula
1/ T
1=V
2/ T
2This shows: the proportional relation of the variation of gas volume and variation of temperature.Make the metering of gas meter be always the metering (being the identical in quality of combustion gas) of standard conditions, must make the volume of epithelium also proportional with temperature variation, promptly temperature is high more, and the volume of epithelium is big more; Temperature is low more, and the volume of epithelium is more little.
Make volume with the proportional variation of temperature, must make the corner variation of rocker also become certain relationship change with temperature variation; Rocker and rocking arm are rigidly connected, so the corner of rocking arm also becomes certain relationship change with temperature.According to four-bar mechanism principle (as shown in Figure 3), under the constant situation of rocking bar, connecting rod and fulcrum, make the corner of rocking arm become certain relationship change with temperature, the length of rocking arm must become certain relationship change with temperature.As described in " construction design method A ", rocking arm is under the drive of compensating part (bimetallic strip), and temperature raises, the thermometal distortion, and rocking arm shortens, and drives the rocker corner and becomes big, realizes that volume and variation of temperature are proportional, and vice versa.As Fig. 8, shown in Figure 9.
2, adopt " construction design method B " to realize the temperature correction.
Implementation: the rocking bar with above-mentioned " construction design method B " is replaced the rocking bar that has " absolute construction " diaphragm gas gauging table now, realizes temperature compensation.
Cassette mechanism structure: as Figure 10, shown in Figure 11.
Cassette mechanism structure consists of: the movement of the sort of structure no matter all is that the rocking bar that rocking bar with former gas meter movement replaces to " structural design B " forms.Vary with temperature by rocking bar and to elongate or shorten, the rotational angle that changes rocker is realized the variation of epithelium volume, realizes the temperature correction.The figure relevant with the temperature correcting principle sees " construction design method B ".
Operating principle: operating principle is identical with " employing " construction design method A " ".Make volume with the proportional variation of temperature, must make the corner variation of rocker also become certain relation with temperature variation; Rocker and rocking arm are rigidly connected, so the corner of rocking arm also becomes certain relationship change with temperature.According to four-bar mechanism principle (shown in figure four), under the constant situation of rocking arm, connecting rod and fulcrum, make the corner of rocking arm become certain relationship change with temperature, the length of rocking bar must become certain relationship change with temperature.As described in " construction design method B ", rocking bar is under the drive of compensating part (bimetallic strip), and temperature raises, the thermometal distortion, and rocking bar is elongated, and the rocking arm rotational angle strengthens, and drives the rocker corner and becomes big, realizes that volume and variation of temperature are proportional; Vice versa.As Figure 10, Figure 11.
(2), " relational structure " diaphragm gas gauging table temperature volume correction design
The correction of relational structure diaphragm gas gauging table temperature volume generally adopts the method for " structural design A " to realize.Because the gas meter of this kind structure is a kind of four-bar mechanism of space multistory structure, realize relatively difficulty of temperature correction by changing rocking bar.
As previously mentioned, this kind structure gas meter to realize the temperature correction, must change its relational structure, become the absolute construction form, increase auxiliary connecting rod mechanism, figure is shown in 12.
Implementation: at first relational structure is become the absolute construction form, as shown in Figure 3.Secondly, replace the rocking arm of gas meter, realization temperature compensation with the rocking arm of above-mentioned " construction design method A ".
Cassette mechanism structure: as Fig. 3.
Cassette mechanism structure consists of: increase the auxiliary connecting rod structure on the basis of original core, the auxiliary connecting rod structure is made up of auxiliary rocker arm, auxiliary connecting rod.Auxiliary rocker arm one end is connected with the rotation axis hinge, and an end is connected with connecting rod link with auxiliary connecting rod; Connecting rod one end is connected with the auxiliary rocker arm hinge, and an end and valve gap are rigidly connected; Auxiliary connecting rod one end is connected with the auxiliary rocker arm hinge, and the other end is connected with the crank hinge; Crank is a part of four-bar mechanism, and crank-motion is a circular motion, therefore under the situation that does not change crank length, when the motion of crank drives the auxiliary connecting rod motion, can not change the movement locus position of valve gap.
After increasing the auxiliary connecting rod structure, the rocking arm of former gas meter movement replaced to the rocking arm of " structural design A " forms.Vary with temperature by rocking arm and to elongate or shorten, the rotational angle that changes rocker is realized the variation of epithelium volume, realizes the temperature correction.The figure relevant with the temperature correcting principle sees " construction design method A ".
Operating principle: operating principle is identical with " employing " construction design method A " ".Make volume with the proportional variation of temperature, must make the corner variation of rocker also become certain relation with temperature variation; Rocker and rocking arm are rigidly connected, so under the constant situation of corner rocking bar, connecting rod and the fulcrum of rocking arm, make the corner of rocking arm become certain relationship change with temperature, and the length of rocking arm must become certain relationship change with temperature.As described in " construction design method A ", rocking arm is under the drive of compensating part (bimetallic strip), and temperature raises, the thermometal distortion, and rocking arm shortens, and the rocking arm rotational angle strengthens, and drives the rocker corner and becomes big, realizes that volume and variation of temperature are proportional; Vice versa.
Claims (5)
1. no source temperature correction gas meter, it is the membrane type structure, comprise movement diaphragm, rocking arm, rocking bar and connecting rod, the connecting rod two ends connect rocking arm and rocking bar respectively, it is characterized in that, also include temperature compensation means, described temperature compensation means is connected with described movement diaphragm by the rocking arm or the rocking bar that can change length.
2. no source temperature correction gas meter according to claim 1, it is characterized in that, described temperature compensation means, it is two rocker structures, comprise fixedly rocking arm, compensating part, movable rocking arm, gib screw and guider screw, fixedly have chute on the rocking arm, described guider screw and chute flexibly connect, rocking arm and movable rocking arm are rigidly connected with gib screw respectively with fixedly at the two ends of described compensating part, described movable rocking arm one end flexibly connects by guider screw and gib screw, and the other end is connected with connecting rod.
3. no source temperature correction gas meter according to claim 1, it is characterized in that, described temperature compensation means comprises parts such as rolling disc, slide block, terminal pad, compensating part, and described rolling disc connects compensating part and terminal pad, and described terminal pad is connected the back and forms a chute with rolling disc; Described slide block is provided with joint pin, is used for being connected with connecting link, also is connected with compensating part simultaneously, moves in the chute of the distortion of the broken compensating part of slide block between terminal pad and rolling disc.
4. according to the no source temperature correction gas meter of claim 2 or 3, it is characterized in that described compensating part is the bimetallic strip structure, described bimetallic strip can be with variation of temperature dilatation.
5. according to claim 1 or 2 or 3 described no source temperature correction gas meters, it is characterized in that, also be provided with the auxiliary connecting rod structure, described auxiliary connecting rod structure is made of auxiliary rocker arm, auxiliary connecting rod, auxiliary rocker arm one end is connected with the rotation axis hinge, one end is connected with connecting rod with auxiliary connecting rod, and the other end of auxiliary connecting rod is connected with the crank hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200365482U CN201034662Y (en) | 2006-12-07 | 2006-12-07 | Passive correction of temperature gas gage table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200365482U CN201034662Y (en) | 2006-12-07 | 2006-12-07 | Passive correction of temperature gas gage table |
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| Publication Number | Publication Date |
|---|---|
| CN201034662Y true CN201034662Y (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006200365482U Expired - Fee Related CN201034662Y (en) | 2006-12-07 | 2006-12-07 | Passive correction of temperature gas gage table |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788315B (en) * | 2010-02-05 | 2012-11-14 | 曲靖众一精细化工股份有限公司 | Method for precisely measuring wet gas |
-
2006
- 2006-12-07 CN CNU2006200365482U patent/CN201034662Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788315B (en) * | 2010-02-05 | 2012-11-14 | 曲靖众一精细化工股份有限公司 | Method for precisely measuring wet gas |
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