CN109738037A - A method of diaphragm gas meter temperature-compensating is solved using tensile stress - Google Patents
A method of diaphragm gas meter temperature-compensating is solved using tensile stress Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 210000000981 epithelium Anatomy 0.000 claims abstract description 46
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 230000004044 response Effects 0.000 claims abstract description 12
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
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- 230000009466 transformation Effects 0.000 claims description 4
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- 239000007789 gas Substances 0.000 description 28
- 238000010586 diagram Methods 0.000 description 11
- 239000000567 combustion gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- NBGBEUITCPENLJ-UHFFFAOYSA-N Bunazosin hydrochloride Chemical compound Cl.C1CN(C(=O)CCC)CCCN1C1=NC(N)=C(C=C(OC)C(OC)=C2)C2=N1 NBGBEUITCPENLJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a kind of methods for solving diaphragm gas meter temperature-compensating using tensile stress, it is related to diaphragm gas meter technical field, specially machine core, the front and rear sides of the machine core are mounted on rocker arm, and collapser is provided on the outside of rocker arm, epithelium, parallel-plate, side cover, and diaphragm press strip is provided with around the epithelium, the side wall of the machine core is vertically provided with vertical shaft, the top of the vertical shaft is combined with toggle and connecting rod, and by displacement axis through connection, the displacement axis positioned beneath has toothed disc, and the surface side position on the lower side of toothed disc is through with track groove in arcuation, axis cooperation is conjugated in the inside of track groove.The method for solving diaphragm gas meter temperature-compensating using tensile stress, using the material (by taking polytetrafluoroethylene (PTFE) as an example) that a kind of thermal capacitance is small, response is fast is temperature-compensating line, its response time compares bimetal leaf, 30 times or more can be shortened, furthermore compensation error caused by epithelium Free Transform is fitted, measuring accuracy can be greatly improved.
Description
Technical field
It is specially a kind of to solve diaphragm gas meter temperature benefit using tensile stress the present invention relates to diaphragm gas meter technical field
The method repaid.
Background technique
Diaphragm gas meter is still most widely used combustion gas meter so far certainly by invention because its stability is good, cheap
Measuring device tool, however the disadvantage is that only metered volume, does not have compensation function for temperature, learnt according to equation of gaseous state, environment temperature
Every 3 DEG C of difference, measurement error just differ 1%, and intraday variation was often for ten several years to twenties degree, and Various Seasonal is even more to have
Four or five ten degree of variable quantity；On the basis of 20 degree, minus 20 degrees are arrived, volume will reduce 13.6%, therefore, it can be stated that without temperature
Degree compensation is the main reason for causing combustion gas supply and marketing difference.
Currently, the diaphragm gas meter compensation schemes implemented, are essentially all to be made using the temperature strain of bimetal leaf
Transmission mechanism is used to go to change valve stroke and then realize temperature-compensating.
Main problem existing for above-mentioned compensation scheme is that bimetal leaf quality is big, thermal capacitance is big, bad response, such as 50 grams
The thermal capacitance of the every degree of bimetal leaf is about 23 joules or so, and lower liter 1 degree of combustion gas of normal pressure of thermal capacitance is only 1.57 joules,
In addition the thermal coefficient of gas is small, thermal inertia is big, will lead to that the response time is too long, and measurement error is excessive；Further, since bimetallic
Quality is big, acts on moving link and will lead to long-term eccentric operating, it is easy to which combustion gas is shortened in the eccentric wear of initiating mechanism part
The service life of table, in addition, epithelium free portion can be formed arc-shaped convex by gas pressure when reducing epithelium amplitude of fluctuation
It rises, and original mechanical temperature compensation mechanism does not consider to compensate error caused by the deformation of epithelium free portion, volume change line
Property is poor, also results in bigger error.
Summary of the invention
In view of the deficiencies of the prior art, diaphragm gas meter temperature-compensating is solved using tensile stress the present invention provides a kind of
Method solves the problems mentioned above in the background art.
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of to solve membrane type using tensile stress
The method of gas meter, flow meter temperature-compensating, including machine core, the front and rear sides of the machine core are mounted on rocker arm, and are all provided on the outside of rocker arm
It is equipped with collapser, epithelium is installed on the outside of the collapser, diaphragm press strip, and the epithelium are provided with around the epithelium
The other side be provided with parallel-plate, the outside of the parallel-plate is fitted with side cover, and the side wall of the machine core is vertically provided with vertical shaft,
The top cooperation of the vertical shaft is mounted with toggle, and the connecting pin of toggle is connected with connecting rod, and the connecting rod is provided with two altogether
It is a, and connection is run through by displacement axis between connecting rod, the displacement axis positioned beneath has toothed disc, and the surface side of toothed disc
Position on the lower side is through with track groove in arcuation, and in the inside of track groove, the surface of the toothed disc is another for the displacement axis cooperation
Side is triangular in shape to be distributed with center of circle column, the first wrapping post and the second wrapping post, and the is provided between the center of circle column and displacement axis
One spring, the periphery of the center of circle column, the first wrapping post and the second wrapping post are surrounded with temperature-compensating line, put down between the vertical shaft
Line middle position is provided with the first positioning column, and the end of the first positioning column is fixed with one end of second spring, and described second
The other end of spring is fixed in connecting shaft, and the temperature-compensating wire loop is wound on the outside of connecting shaft, the top peace of the toggle
It is equipped with clipping sliding block, and the top of clipping sliding block is provided with drive rod, there are two the drive rod is arranged altogether, and between drive rod
By connecting axis connection, the clipping sliding block is internally provided with the first clipping column, and the first clipping column is from toggle portion protrusion,
The second clipping column is provided on the upside of the vertical shaft, and the vertical lower of the second clipping column is mounted with third positioning column, it is described flat
The first limit hole and the second limit hole are symmetrically opened up on andante, the side of the side cover symmetrically offers the first threading hole and second
Threading hole, the midline position of the epithelium free end is disposed with ring, and is provided with and leads at ring long side symmetric position 1/4
Draw fixed point, traction fixed point position corresponding section is provided with location hole, a side ring of the location hole on the parallel-plate
Around the 4th positioning column is disposed with, the distal end of the temperature-compensating line increases cam to realize compensation fitting.
Optionally, the rocker arm controls epithelium by collapser and moves back and forth to form air cavity, and the rocker arm passes through machine core
The vertical shaft of side wall is connected to external toggle, and toggle is connected to connecting rod, and the connecting rod of two sides is fixed by conjugating axis, conjugates axis lower end
It is inserted into the track groove on toothed disc, can be slided in track groove.
Optionally, described for temperature compensation membrane type gas meter, the first bullet is set between the displacement axis and center of circle column
Spring, to keep maximum radius rotation during keeping temperature perseverance timing mechanism to operate, temperature-compensating line passes through the first spring, and one solid
Due to conjugating on axis, through center of circle column post-tensioning to the first wrapping post, then after the second wrapping post wraps to center of circle column again, according to tool
Body length selects one end to fix, and displacement axis upper end is connected with connecting rod, and the both ends of connecting rod are respectively connected with toggle, are connected under the toggle other end
Vertical shaft, vertical shaft and rocker arm cooperate, and realize the reciprocating motion of epithelium.
Optionally, in the method for the temperature-compensating, for temperature compensation membrane type gas meter, a kind of mode is in gas
Room side wall increases amplitude limiter, and two sides vertical shaft parallel lines interposition installs the second positioning column, one end of fixed second spring, the
The other end of two springs is connected to connecting shaft, and temperature-compensating line bypasses after connecting shaft behind top, according to specific length around to
Bottom is fixed, and connecting shaft is connected to two sides drive rod, connects Finite Amplitude sliding block in drive rod lower part, clipping sliding block is in slider track
Interior sliding, clipping sliding block are up-narrow and down-wide groove, there is a first clipping column from toggle portion protrusion inside clipping sliding block,
First clipping column can finally limit the amplitude of fluctuation of rocker arm by the movement inside clipping sliding block；
In the method for the temperature-compensating, another way is by the way of two temperature compensating line, i.e., in gas chamber side
Axis side stand like a wall equipped with the second clipping column, is equipped with third positioning column in the second clipping column vertical lower, wherein temperature-compensating line is logical
After crossing the second clipping column, around to after third positioning column, fixed further around to bottom；
Above two mode is symmetrical structure, as the transformation temperature compensating line of temperature is flexible or increases, and passes through limit
Toggle hunting range processed, so that rocker arm amplitude of fluctuation becomes larger or becomes smaller, to achieve the purpose that temperature-compensating.
Optionally, in the method for the temperature-compensating, for temperature compensation membrane type gas meter, a kind of mode is in side
Lid side symmetrically opens up the first threading hole and the second threading hole, and the first limit hole and the second limit are symmetrically opened up on parallel-plate
One end of a wherein temperature-compensating line is fixed on the first threading hole of side cover by hole, then passes through the of parallel-plate or more
One limit hole and the second limit hole eventually pass through and select fixed point according to length after the second threading hole；
In the method for the temperature-compensating, another way is that the midline position in epithelium free end arranges ring, is gone in ring
Line need to be arranged temperature using elasticity modulus is larger, the lesser metal fine of temperature linear expansion coefficient, and at long side symmetric position 1/4 and mend
Repay the traction fixed point of line, and it is corresponding location hole is equipped on parallel-plate, wherein temperature-compensating line leading from ring
Draw fixed point, be wrapped on the 4th positioning column through the location hole on parallel-plate, and fixed point, the above knot are selected according to specific length
Structure is symmetrical.
Optionally, described for mechanical temperature compensation diaphragm gas meter, when reducing epithelium amplitude of fluctuation, epithelium is certainly
Arc-shaped convex can be formed by gas pressure by part, epithelium free portion can be divided into two sections, be L1 and L2 respectively, wherein L2
Isometric with side wall support face, L1 is free wxpansion part, while being also the arc length of dilation；S1 is that compensation rear arm reduces width
Degree, whole to generate arc-shaped protrusion, non-linear volume change is the area that circular arc and its string are constituted；
According to formula:
Thus, area is under string
Wherein, it is arc length L that the length of free portion is constant in epithelium moving process, and chord length can be by displacement and fixed point
It determines, a is camber line central angle, and R is radius；
Non-linear result is presented in compensated deviation；
When selecting 20 degree to adjust standard value (3mm) as amplitude with -5 degree, amplitude adjusted value and volume change are -25 to 20
Deviation is smaller after compensation in range, less than 1%, be approximately considered it is in a linear relationship, with polytetrafluoroethylene (PTFE) (linear expansion coefficient is 1.1~
2.56 × 10-4/ DEG C) for, amplitude reduces 3mm, needs 1.2 meters of wire length that can meet needs.
Optionally, the temperature-compensating line (by taking polytetrafluoroethylene (PTFE) as an example), response time than bimetal leaf, can shorten
30 times or more, greatly improve measuring accuracy；
Raw tensile stress is sold of one's property using temperature and changes swing range, can effectively reduce the volume and thermal capacitance of temperature stress body, pole
The big reduction response time improves measuring accuracy；
When the amplitude linearity of air cavity inner rocker arm is decreased or increased, it is possible that nonlinear problem is reduced or increased in volume,
The mode that the radius of turn for conjugating axis on toothed disc is become homologous thread is taken to be fitted to correct nonlinearity erron.
Optionally, described when the amplitude linearity of air cavity inner rocker arm is decreased or increased, it is possible that volume reduces or increases
Add nonlinear problem, take the mode that clipping sliding block bevel edge is become to homologous thread, or the second clipping column end is designed to convex
It takes turns shape and cooperates linear type clipping wall, be fitted to correct nonlinearity erron.
Optionally, the stroke of the collapser amplitude of fluctuation and temperature-compensating line is not linear relationship, but in amplitude of fluctuation
When degree compensation rate is less big, linear approximate relationship.
Optionally, the described temperature-compensation method can increase cam in the distal end of temperature-compensating line and carry out with cam
Single-point is fixed, and the non-linear conversion output of compensating line linear change is realized in temperature compensation procedure, is returned to be fitted (quasi-complement)
Turn bulk temperature compensation swing arm amplitude of oscillation linear change and the nonlinear problem of volume change.
The present invention provides a kind of methods for solving diaphragm gas meter temperature-compensating using tensile stress, have following beneficial to effect
Fruit: the method for solving diaphragm gas meter temperature-compensating using tensile stress uses the material that a kind of thermal capacitance is small, response is fast (with poly-
For tetrafluoroethene) it is temperature-compensating line, the response time than bimetal leaf, can shorten 30 times or more, greatly improve
Measuring accuracy；In addition, it is contemplated that compensation error and the Fitting Calculation caused by the deformation of epithelium free portion, more accurate can measure
Precision；Specific embodiment has reasonable structure design, and installation is simple, and easy to use, structure motion is flexible, accurate positioning.
Detailed description of the invention
Fig. 1 is diaphragm gas meter structural schematic diagram of the present invention；
Fig. 2 is that temperature-compensating non-linear deviation of the present invention calculates schematic diagram；
Fig. 3 is structural schematic diagram of the present invention using toothed disc bracing wire compensation；
Fig. 4 is a part of structural schematic diagram that the present invention swings clipping compensation using swing arm；
Fig. 5 is another part structural schematic diagram that the present invention swings clipping compensation using swing arm；
Fig. 6 is a part of structural schematic diagram of the present invention using the compensation of epithelium clipping；
Fig. 7 is another part structural schematic diagram of the present invention using the compensation of epithelium clipping；
Fig. 8 is the structural schematic diagram that the present invention realizes fitting by installation cam.
In figure: 1, machine core；2, rocker arm；3, collapser；4, epithelium；5, diaphragm press strip；6, parallel-plate；7, side cover；8, connecting rod；
9, toggle；10, vertical shaft；11, toothed disc；12, axis is conjugated；13, track groove；14, the first spring；15, temperature-compensating line；16, circle
Stem；17, the first wrapping post；18, the second wrapping post；19, the first positioning column；20, second spring；21, slider track；22,
One clipping column；23, connecting shaft；24, clipping sliding block；25, drive rod；26, the second positioning column；27, the second clipping column；28, third
Positioning column；29, the first threading hole；30, the first limit hole；31, the second limit hole；32, the second threading hole；33, ring；34,
Draw fixed point；35, location hole；36, the 4th positioning column；37, cam.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Embodiment 1:
As shown in Figure 1, a kind of diaphragm gas meter temperature compensation means is mainly made of metering device, metering device is by machine core
1, measuring room and the transmission device on top are constituted, measuring room include rocker arm 2, collapser 3, epithelium 4, diaphragm press strip 5, parallel-plate 6,
Side cover 7, rocker arm 2 are moved back and forth by collapser 3, control epithelium 4 to form air cavity, it is characterized in that rocker arm 2 passes through gas chamber sidewall
Vertical shaft 10 be connected to external toggle 9, toggle 9 is connected to connecting rod 8, and the connecting rod 8 of two sides is fixed by displacement axis 12, displacement
12 lower end of axis is inserted into the track groove 13 on toothed disc 11, and can be slided in track groove 13.When there is gas to enter, toothed disc
11 rotation can drive the movement of connecting rod 8, toggle 9 by displacement axis 12, and drive epithelium 4 by the rocker arm 2 that vertical shaft 10 connects
Reciprocating motion realize metering.
As shown in Fig. 2, 4 free portion of epithelium can be formed arc-shaped convex by gas pressure when reducing 4 amplitude of fluctuation of epithelium
It rises, 4 free portion of epithelium can be divided into 2 sections, be that L1 and L2, wherein L2 and side wall support face are isometric respectively, L1 is free wxpansion
Part, while being also the arc length of dilation；S1 is that compensation rear arm 2 reduces amplitude, and whole generation arc-shaped protrusion is non-linear
Volume change is the area that circular arc and its string are constituted.
According to formula:
Thus, area is under string
Wherein, it is arc length L that the length of free portion is constant in 4 moving process of epithelium, and chord length can be by displacement and fixation
Point determines that a is camber line central angle, and R is radius.
It can be obtained by above-mentioned formula, compensation error calculation result caused by the deformation of 4 free wxpansion part of epithelium is as follows:
| Temperature | Volume deviation 1 | Amplitude adjustment amount | Volume deviation 2 | Deviation after compensation |
| 20 | 0.00% | 0 | 0.00% | 0.00% |
| 15 | - 1.74% | 0.6 | - 1.17% | - 0.57% |
| 10 | - 3.53% | 1.2 | - 3.07% | - 0.46% |
| 5 | - 5.39% | 1.8 | - 5.09% | - 0.31% |
| 0 | - 7.32% | 2.4 | - 7.18% | - 0.15% |
| -5 | - 9.32% | 3 | - 9.32% | 0.00% |
| -10 | - 11.40% | 3.6 | - 11.54% | 0.14% |
| -15 | - 13.56% | 4.2 | - 13.84% | 0.28% |
| -20 | - 15.80% | 4.8 | - 16.23% | 0.43% |
| -25 | - 18.13% | 5.4 | - 18.71% | 0.58% |
Volume deviation 1 is the theoretical com-pensation value calculated according to temperature change；Volume deviation 2 is calculated according to amplitude adjustment amount
Practical offset；
As seen from the above table, non-linear result is presented in compensated deviation；It is marked when selecting 20 degree to adjust with -5 degree as amplitude
Deviation is smaller after quasi- value (3mm), amplitude adjusted value and volume change compensate in -25 to 20 ranges, less than 1%, is approximately considered
It is in a linear relationship.By taking polytetrafluoroethylene (PTFE) (linear expansion coefficient is 1.1~2.56 × 10-4/ DEG C) as an example, amplitude diminution 3mm, need 0.5~
1.2 meters of wire length can meet needs.
Using polytetrafluoroethylene (PTFE) as temperature-compensating line 15, mainly according to the measurement of its linear expansion coefficient；To turn round volume
For 1.2 liters of diaphragm gas meters, the stroke of valve reduces 3mm, and volume adjusting can achieve 18%, be equivalent to 45 degree of temperature difference
Compensation rate, needs can be met according to 40 degree of contractions 3mm, 60~80cm of length；With polytetrafluoroethylene (PTFE) (specific heat capacity 1.05J/g*
Degree) for, diameter 1mm, 1 meter less than 1 gram, thermal capacitance deficiency erg-ten, compared with bimetal leaf, thermal capacitance reduces by 23 times, if appropriate increase
Add surface area, then the response time can also reduce.Experiment shows that polytetrafluoroethylene tape can shorten 30 than the bimetal leaf response time
Times or more, greatly improve measuring accuracy.
Embodiment 2:
Fig. 3 is the structural schematic diagram that temperature-compensating is realized by way of the bracing wire on toothed disc 11.As shown in figure 3, its
A kind of middle structure is to conjugate 12 lower end of axis to be inserted into the track groove 13 on toothed disc 11, and can slide in track groove 13, is being become
First spring 14 is set between position axis 12 and center of circle column 16 to keep maximum radius rotation during keeping temperature perseverance timing mechanism to operate
Turn, temperature-compensating line 15 passes through the first spring 14, and one is fixed on displacement axis 12, through 16 post-tensioning of center of circle column to the first wrapping post
17, then it is fixed after the second wrapping post 18 wraps to center of circle column 16 again according to regular length；Conjugate 12 upper end of axis and company
Bar 8 is connected, its both ends of connecting rod 8 are respectively connected with toggle 9, and vertical shaft 10, the cooperation of vertical shaft 10 and rocker arm 2 are connected under 9 other end of toggle, is realized
The reciprocating motion of epithelium 4.
When gas meter, flow meter is under low temperature condition, the meeting contraction distortion of temperature-compensating line 15 passes through tensile stress and drives displacement axis 12
It is mobile to 16 direction of center of circle column, then by the geometric dimension the constraint relationship of connecting rod 8, toggle 9, vertical shaft 10, rocker arm 2 and epithelium 4, make
Stroke is obtained to shorten to achieve the purpose that temperature-compensating.When gas meter, flow meter is under high-temperature condition, temperature-compensating line 15 can expand change
Shape, and drive displacement axis 12 far from 16 direction of center of circle column, then pass through the geometry of connecting rod 8, toggle 9, vertical shaft 10, rocker arm 2 and epithelium 4
Dimension constraint relation, so that 2 stroke of rocker arm is elongated to achieve the purpose that temperature-compensating.
When the amplitude linearity of air cavity inner rocker arm 2 is decreased or increased, it is possible that nonlinear problem is reduced or increased in volume,
The mode that the radius of turn for conjugating axis 11 on toothed disc 12 is become homologous thread is taken to be fitted to correct nonlinearity erron.
Embodiment 3:
Referring to fig. 4 and Fig. 5, to swing clipping compensation scheme schematic diagram using rocker arm 2, as shown in figure 4, one of structure
To increase amplitude limiter in gas chamber sidewall, in two sides, 10 parallel lines interposition of vertical shaft installs the first positioning column 19, and fixed second
One end of spring 20, the other end of second spring 20 are connected to connecting shaft 23, and temperature-compensating line 15 bypasses after connecting shaft 23 through upper
It is fixed after second positioning column 26 in portion around to bottom and according to specific length, connecting shaft 23 is connected to two sides drive rod 25, is passing
25 lower part of lever connect Finite Amplitude sliding block 24, clipping sliding block 24 be up-narrow and down-wide groove, have inside clipping sliding block 24 one from
First clipping column 22 of 9 part protrusion of toggle, the first clipping column 22 can be by the movements inside clipping sliding block 24 to final
Limit the amplitude of fluctuation of rocker arm 2.
When temperature-compensating line 15 shortens because of temperature decline length, drive rod 25 will drive clipping sliding block 24 in slider track
21 move down, and 22 amplitude of swinging of the first clipping column is caused to become smaller, and 2 amplitude of fluctuation of rocker arm also becomes smaller, and revolution volume also becomes
It is small；Otherwise when the temperature increases, drive rod 25 will drive clipping sliding block 24 and move up, and 22 amplitude of fluctuation of the first clipping column becomes
Greatly, 2 amplitude of fluctuation of rocker arm also becomes larger, and revolution volume becomes larger simultaneously；Using symmetric design, a temperature-compensating line 15 can be simultaneously
Play the role of clipping simultaneously to two sides rocker arm 2.
According to before to the analysis of air cavity, when the amplitude linearity of air cavity inner rocker arm 2 is decreased or increased, it is possible that body
Nonlinear problem is reduced or increased in product, takes 24 bevel edge of clipping sliding block becoming the mode of homologous thread (or by clipping column end
It is designed to that cam face cooperates linear type clipping wall) it is fitted to correct nonlinearity erron.
As shown in figure 5, another structure is to be equipped with by the way of two temperature compensating line in 10 side of gas chamber sidewall vertical shaft
Second clipping column 27 is equipped with third positioning column 28 in 27 vertical lower of the second clipping column, and wherein temperature-compensating line 15 passes through second
It is fixed after clipping column 27 around to around to bottom after third positioning column 28 and according to specific length.Above two mode is symmetrical junction
Structure.As the transformation temperature compensating line 15 of temperature is flexible or increases, and by limitation 9 hunting range of toggle, so that rocker arm 2 is swung
Amplitude becomes larger or becomes smaller to achieve the purpose that temperature-compensating.As the transformation temperature compensating line 15 of temperature is flexible or increases, and
By limiting 9 hunting range of toggle, so that 2 amplitude of fluctuation of rocker arm becomes larger or becomes smaller to achieve the purpose that temperature-compensating.
Embodiment 4:
As shown in Figure 6 and Figure 7, for using the temperature-compensating mode of 4 clipping scheme of epithelium.As shown in fig. 6, one of which is
Using 4 clipping mode of epithelium.One of structure is symmetrically to open up the first threading hole 29, the second threading hole in air cavity side wall side
32, and the first limit hole 30, the second limit hole 31 are symmetrically opened up on parallel-plate 6, by the one of a wherein temperature-compensating line 15
End is fixed on the first threading hole of air cavity side wall 29, and the first limit hole 30 and the second limit hole of about 6 parallel-plate are then passed through
31, it eventually passes through the second threading hole 32 and is fixed according to specific length.As shown in fig. 7, another structure is in 4 free end of epithelium
Midline position arrange ring 33, ring 33 need to using elasticity modulus is larger, the lesser metal fine of temperature linear expansion coefficient,
And at long side symmetric position 1/4 setting traction fixed point 34, and it is corresponding on parallel-plate 6 be equipped with location hole 35, wherein one
Bar temperature-compensating line 15 is wrapped in the 4th positioning column 36 through the location hole 35 on parallel-plate 6 from the traction fixed point 34 of ring 33
On, and fixed point is selected according to specific length, the above structure is symmetrical.
When the temperature decreases, after temperature-compensating line 15 is shunk, therefore amplitude of fluctuation is two-way limited for the meeting of collapser 3, reaches benefit
Repay purpose.It should be noted that the stroke of 3 amplitude of fluctuation of collapser and temperature-compensating line 15 is not linear relationship, but swinging
When Amplitude Compensation amount is less big, linear approximate relationship.
Embodiment 5:
Fig. 8 is the schematic diagram that fitting is realized by installation cam 37.For by installing cam 37 on toothed disc 11,
Since the length variation of temperature-compensating line 15 is linear relationship to be presented, and the amplitude of fluctuation of diaphragm is in the drive of mechanism with temperature
Under it is also in a linear relationship with stretching for wire length, but the revolution volume compensation variation of corresponding air cavity is not and the linear phase of the diaphragm amplitude of oscillation
It closes；Increase cam 37 in the distal end of temperature-compensating line 15 and carry out single-point with cam 37 and fixes, it can be real in temperature compensation procedure
The non-linear conversion output of existing compensating line linear change, so that it is linear to be fitted (quasi-complement) revolution bulk temperature compensation 2 amplitude of oscillation of rocker arm
Change and the nonlinear problem of volume change.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress, including machine core (1), it is characterised in that: described
The front and rear sides of machine core (1) are mounted on rocker arm (2), and collapser (3), the collapser are provided on the outside of rocker arm (2)
(3) it is equipped with epithelium (4), is provided with diaphragm press strip (5) around the epithelium (4), and the epithelium (4) is another on the outside of
Side is provided with parallel-plate (6), and the outside of the parallel-plate (6) is fitted with side cover (7), and the side wall of the machine core (1) is vertically arranged
Have vertical shaft (10), the top cooperation of the vertical shaft (10) is mounted with toggle (9), and the connecting pin of toggle (9) is connected with company
Bar (8), the connecting rod (8) pass through displacement axis (12) through connection, the displacement axis altogether there are two settings, and between connecting rod (8)
(12) positioned beneath has toothed disc (11), and the surface side position on the lower side of toothed disc (11) is through with track groove in arcuation
(13), in the inside of track groove (13), the surface other side of the toothed disc (11) is triangular in shape for displacement axis (12) cooperation
Be distributed with center of circle column (16), the first wrapping post (17) and the second wrapping post (18), the center of circle column (16) and displacement axis (12) it
Between be provided with the first spring (14), the periphery of the center of circle column (16), the first wrapping post (17) and the second wrapping post (18) is surround
Have temperature-compensating line (15), parallel lines middle position is provided with the first positioning column (19) between the vertical shaft (10), and first is fixed
The end of position column (19) is fixed with one end of second spring (20), and the other end of the second spring (20) is fixed on connecting shaft
(23) on, the temperature-compensating line (15) is looped around the outside of connecting shaft (23), and the top placement Finite Amplitude of the toggle (9) is sliding
Block (24), and the top of clipping sliding block (24) is provided with drive rod (25), there are two the total settings of the drive rod (25), and is driven
It being connected between bar (25) by connecting shaft (23), the clipping sliding block (24) is internally provided with the first clipping column (22), and the
One clipping column (22) is provided with the second clipping column (27), and the second limit on the upside of toggle (9) part protrusion, the vertical shaft (10)
The vertical lower of width column (27) is mounted with third positioning column (28), symmetrically opens up the first limit hole (30) on the parallel-plate (6)
The first threading hole (29) and the second threading hole (32), institute are symmetrically offered with the side of the second limit hole (31), the side cover (7)
The midline position for stating epithelium (4) free end is disposed with ring (33), and is provided at ring (33) long side symmetric position 1/4
It draws fixed point (34), traction fixed point (34) position corresponding section is provided with location hole (35), institute on the parallel-plate (6)
The side for stating location hole (35) increases cam around the 4th positioning column (36), the distal end of the temperature-compensating line (15) is disposed with
(37) to realize compensation fitting.
2. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 1, feature exist
In: the rocker arm (2) is moved back and forth by collapser (3) control epithelium (4) to form air cavity, and the rocker arm (2) passes through machine core
(1) vertical shaft (10) of side wall is connected to external toggle (9), and toggle (9) is connected to connecting rod (8), and the connecting rod (8) of two sides passes through change
Position axis (12) is fixed, in the track groove (13) in displacement axis (12) lower end insertion toothed disc (11), can slide in track groove (13)
It is dynamic.
3. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 1, feature exist
In: for temperature compensation membrane type gas meter, the first spring (14) are set between the displacement axis (12) and center of circle column (16), with
It keeping keeping maximum radius rotation during the operating of temperature perseverance timing mechanism, temperature-compensating line (15) passes through the first spring (14), and one
Head is fixed in displacement axis (12), through center of circle column (16) post-tensioning to the first wrapping post (17), then again through the second wrapping post (18)
After wrapping to center of circle column (16), one end is selected to fix according to specific length, displacement axis (12) upper end is connected with connecting rod (8), connecting rod
(8) both ends are respectively connected with toggle (9), are connected with vertical shaft (10) under toggle (9) other end, and vertical shaft (10) and rocker arm (2) cooperate, and are realized
The reciprocating motion of epithelium (4).
4. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 1, feature exist
In: in the method for the temperature-compensating, for temperature compensation membrane type gas meter, a kind of mode is to increase to limit in gas chamber sidewall
Width device, two sides vertical shaft (10) parallel lines interposition install the second positioning column (26), one end of fixed second spring (20), the
The other end of two springs (20) is connected to connecting shaft (23), and temperature-compensating line (15) is around connecting shaft (23) by (26) on top
Afterwards, it is fixed according to specific length around to bottom, connecting shaft (23) is connected to two sides drive rod (25), connects in drive rod (25) lower part
It is connected to clipping sliding block (24), clipping sliding block (24) sliding in the slider track (21), clipping sliding block (24) is up-narrow and down-wide recessed
Slot has a first clipping column (22) from toggle (9) part protrusion inside clipping sliding block (24), and the first clipping column (22) can lead to
Cross the amplitude of fluctuation that rocker arm (2) are finally limited in the internal movement of clipping sliding block (24)；
In the method for the temperature-compensating, another way is by the way of two temperature compensating line (15), i.e., in gas chamber side
Axis (10) side stand like a wall equipped with the second clipping column (27), is equipped with third positioning column (28) in the second clipping column (27) vertical lower,
Wherein temperature-compensating line (15) further around to bottom by around to after third positioning column (28), fixing after the second clipping column (27)；
Above two mode is symmetrical structure, as the transformation temperature compensating line (15) of temperature is flexible or increases, and passes through limit
Toggle (9) hunting range processed, so that rocker arm (2) amplitude of fluctuation becomes larger or becomes smaller, to achieve the purpose that temperature-compensating.
5. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 1, feature exist
In: in the method for the temperature-compensating, for temperature compensation membrane type gas meter, a kind of mode is in side cover (7) side pair
Title opens up the first threading hole (29) and the second threading hole (32), and symmetrically open up on parallel-plate (6) the first limit hole (30) and
One end of a wherein temperature-compensating line (15) is fixed on the first threading hole (29) of side cover (7) by the second limit hole (31),
The first limit hole (30) and the second limit hole (31) of parallel-plate (6) up and down are then passed through, the second threading hole (32) are eventually passed through
Fixed point is selected according to length afterwards；
In the method for the temperature-compensating, another way is that the midline position in epithelium (4) free end arranges ring (33), ring
Line (33) need to be arranged using elasticity modulus is larger, the lesser metal fine of temperature linear expansion coefficient, and at long side symmetric position 1/4
The traction fixed point (34) of temperature-compensating line (15), and it is corresponding on parallel-plate (6) be equipped with location hole (35), wherein a temperature
The traction fixed point (34) of compensating line (15) from ring (33) is spent, is wrapped in the 4th through the location hole (35) on parallel-plate (6)
On positioning column (36), and fixed point is selected according to specific length, the above structure is symmetrical.
6. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 1, feature exist
In: for mechanical temperature compensation diaphragm gas meter, when reducing epithelium (4) amplitude of fluctuation, epithelium (4) free portion can be by
Gas pressure forms arc-shaped convex, epithelium (4) free portion can be divided into two sections, be L1 and L2, wherein L2 and side wall respectively
Supporting surface is isometric, and L1 is free wxpansion part, while being also the arc length of dilation；S1 is that compensation rear arm (2) reduces amplitude,
Whole to generate arc-shaped protrusion, non-linear volume change is the area that circular arc and its string are constituted；
According to formula:
Thus, area is under string
Wherein, it is arc length L that the length of free portion is constant in epithelium moving process, and chord length can be true by displacement and fixed point
Fixed, a is camber line central angle, and R is radius；
Non-linear result is presented in compensated deviation；
When selecting 20 degree to adjust standard value (3mm) as amplitude with -5 degree, amplitude adjusted value and volume change are in -25 to 20 ranges
Deviation is smaller after interior compensation, less than 1%, be approximately considered it is in a linear relationship, with polytetrafluoroethylene (PTFE) (linear expansion coefficient be 1.1~2.56
× 10-4/ DEG C) for, amplitude reduces 3mm, needs 1.2 meters of wire length that can meet needs.
7. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 3, feature exist
In the temperature-compensating line (15) (by taking polytetrafluoroethylene (PTFE) as an example), the response time than bimetal leaf, can shorten 30 times with
On, greatly improve measuring accuracy；
Raw tensile stress is sold of one's property using temperature and changes swing range, can effectively reduce the volume and thermal capacitance of temperature stress body, greatly
Reduce the response time, improves measuring accuracy；
When the amplitude linearity of air cavity inner rocker arm (2) is decreased or increased, it is possible that nonlinear problem is reduced or increased in volume, adopt
The mode that the radius of turn for conjugating axis (12) on toothed disc (11) is become homologous thread is taken to be fitted to correct non-linear mistake
Difference.
8. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 4, feature exist
In: when the amplitude linearity of air cavity inner rocker arm (2) is decreased or increased, it is possible that nonlinear problem is reduced or increased in volume,
The mode that clipping sliding block (24) bevel edge is become to homologous thread is taken, or second clipping column (27) end is designed to cam face
Cooperate linear type clipping wall, is fitted to correct nonlinearity erron.
9. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 5, feature exist
In: the stroke of collapser (3) amplitude of fluctuation and temperature-compensating line (15) is not linear relationship, but is compensated in amplitude of fluctuation
When measuring less big, linear approximate relationship.
10. a kind of method for solving diaphragm gas meter temperature-compensating using tensile stress according to claim 5, feature exist
In: the temperature-compensation method can increase cam (37) in the distal end of temperature-compensating line (15) and carry out single-point with cam (37)
It is fixed, the non-linear conversion output of compensating line linear change is realized in temperature compensation procedure, to be fitted (quasi-complement) revolving body
Accumulated temperature degree compensates swing arm (2) amplitude of oscillation linear change and the nonlinear problem of volume change.
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| CN110174148A (en) * | 2019-06-18 | 2019-08-27 | 台州杜瑞仪表有限公司 | Coal gas meter with temperature compensation means |
| CN112525282A (en) * | 2020-11-24 | 2021-03-19 | 重庆市山城燃气设备有限公司 | Membrane module |
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