CN1450342A - Piston flowmeter - Google Patents
Piston flowmeter Download PDFInfo
- Publication number
- CN1450342A CN1450342A CN 02105921 CN02105921A CN1450342A CN 1450342 A CN1450342 A CN 1450342A CN 02105921 CN02105921 CN 02105921 CN 02105921 A CN02105921 A CN 02105921A CN 1450342 A CN1450342 A CN 1450342A
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- Prior art keywords
- piston
- revolving shaft
- flowmeter
- magnet
- driving shaft
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Abstract
The invention provides a measure-insured, reliable, small, low-cost piston flowmeter. The reciprocation of the connecting rod of the piston in multiple cylinders converts into the rotary motion of the driving shaft through the crankshaft, the driving shaft making the rotary shaft of the flowmeter's measuring framework rotate, the horizontal long hole corresponding to the piston travel formed on the connecting rod, the crankpin set on the crankshaft inserted in the horizontal long hole through the clearance and the upper dead-center limiting part set in the contraposition to the inner surface on the top of the cylinder.
Description
Technical field
The present invention relates to a kind of piston flowmeter that on the fueller of supply fuel oils such as automobile, uses.
Background technology
In the past, in the fueller of fuel oils such as automobile supply gasoline, use a kind of piston flowmeter of positive displacement, to-and-fro movement with the piston that will slide in cylinder passes to revolving shaft through bent axle, be converted to pulse signal to detect variable by revolution, perhaps by the counter of this revolution with the driving device formula with this revolving shaft.
The employed piston flowmeter of fueller in the past, must make that the surface area of piston is consistent with the variable of being counted by the revolution of revolving shaft with the volume of number of pistons gained with the product of throw of poston, but can cause because of the change in size or the phenomenon of leakage due to the wearing and tearing of various parts, based on the pulse-losing of pulse transmitter structure, precision can reduce in perhaps moving.In addition, the operation that all part count are then processed for a long time, assembled also becomes many, thus much just can cause high cost.
The present invention in view of the above-mentioned problems, its purpose is to provide a kind of the guarantee reliability of measuring and equipment miniaturization and piston flowmeter cheaply.
Summary of the invention
To achieve these goals, the described invention of claim 1 is a kind of piston flowmeter, will be in a plurality of cylinders the connecting link of pistons reciprocating convert the gyration of driving shaft to by bent axle, make the revolving shaft revolution of flow measurement mechanism by this driving shaft, it is characterized in that, form the hole of growing crosswise on the described connecting link corresponding to throw of poston, be arranged on crank pin on the bent axle by the gap intercalation in this grows crosswise the hole, and be provided with the upper dead center restrictions of piston in the position of the top inner surface that is opposite to described cylinder.Owing to when the piston arrives upper dead center, contact with the upper dead center restrictions, limited its above moving, thereby can make the stroke of piston keep certain, can not reduce precision.
The described invention of claim 2 is characterised in that described upper dead center restrictions forms can adjust the position from the outside.Can adjust the upper dead center restrictions from the outside.
Claim 3 invention is characterised in that, it is outstanding to the outside of the housing that is provided with flow measurement mechanism that described revolving shaft is arranged to its end, and near the revolving shaft of this housing perpendicular to described revolving shaft keep plate is set, on described revolving shaft, be provided with the pressed part of suppressing described keep plate by brake pad.Under the state that the inflow of fluid stops, revolving shaft is accepted friction force by brake pad, has positively stoped vibration to wait the revolution that causes, and can guarantee the reliability of variable.
The invention of claim 4 is characterised in that, described flow measurement mechanism is by luminophor, photoreceptor constitutes with the impulse sender that is disposed at the return slot dish that slit is arranged between the two and they are accommodated in the housing, form the luminophor patchhole in described case lid side, the photoreceptor that is formed with the undergauge peristome in described enclosure body side inserts fixed orifice, and described return slot dish has by connecting the supporting core that all-in-one-piece hub portion and pressing plate portion and key portion constitute with described revolving shaft, form opening and the keyway that engages with the key portion of supporting core and the disk that forms a plurality of slits at circumference of the hub portion of passing described supporting core at central part, also constitute with the opening that forms the hub portion of accepting described supporting core at central part with the pressing plate of the pressing plate portion of the supporting core described disk of clamping together.Because undergauge peristome and photoreceptor insert fixed orifice and form as one, part count is few, and assembling procedure also is reduced, and can make at low cost, in addition, good pulse can take place, and this external cause body is concavo-convex the joint with the chimeric of lid, can be easy to assembling.
The described invention of claim 5 is characterised in that, described piston is constituted by the seal pad of the ring-type of the discoid piston only of the oil resistance synthetic resin of hard and soft oil resistance synthetic resin, described piston only by injection moulding be embedded in seal pad interior perimembranous to be integral with it.Can not reduce part count and assembling procedure, become flowmeter cheaply from the composition surface leakage of oil of seal pad with piston only.
The invention of claim 6 is, a kind of piston flowmeter, will be in a plurality of cylinders the connecting link of pistons reciprocating convert the gyration of driving shaft to by bent axle, make the revolving shaft revolution of flow measurement mechanism by this driving shaft, it is characterized in that, the housing on the top of described driving shaft forms the receiving room of upper opening, inside at this receiving room, magnet cover with the 1st magnet receiving room of taking in the 1st ringshaped magnet can be installed on freely to rotate described driving shaft the upper end be contained, in described the 1st magnet receiving room, make the 2nd ringshaped magnet and central shaft coaxial, taken in freely to rotate on the magnet frame with the revolving shaft that described the 1st ringshaped magnet face-off ground is installed, magnet frame is by being arranged on the flange part of upper side, be installed to the upper end of housing by means of encapsulant, and the upper end of described revolving shaft is directed in the axle sleeve and outstanding to the outside.Because driving shaft separates with the revolving shaft mechanical type, and the flange part on top is fixed on the housing by encapsulant, and the phenomenon of leakage can not take place in the revolving shaft side.
Description of drawings
Fig. 1 is the cut-open view of the piston flowmeter of the present invention the 1st embodiment,
Near the view of Fig. 2 for amplifying the axis hole of the piston flowmeter of the present invention the 1st embodiment,
Fig. 3 is the cut-open view of the withstand voltage explosion-proof cell part of the piston flowmeter of the present invention the 2nd embodiment,
Fig. 4 is the skeleton view at the top of the piston flowmeter of the present invention the 2nd embodiment,
Fig. 5 is the cut-open view that near each member arrestment mechanism of piston flowmeter of the present invention the 2nd embodiment is shown,
Fig. 6 is the skeleton view of other embodiment of keep plate that the piston flowmeter of the present invention the 2nd embodiment is shown,
Fig. 7 is the sectional view of upper body section that the piston flowmeter of the present invention the 3rd embodiment is shown,
The vertical view that Fig. 8 looks from the lid side for the piston flowmeter of the present invention the 3rd embodiment,
The upward view that Fig. 9 looks from base side for the piston flowmeter of the present invention the 3rd embodiment,
Figure 10 is the view that illustrates under the return slot plate confined state of piston flowmeter of the present invention the 3rd embodiment,
Figure 11 is the cut-open view of the amplification of the photoreceptor mounting hole of the piston flowmeter of the present invention the 3rd embodiment,
Figure 12 is the vertical view of the piston of the piston flowmeter of the present invention the 4th embodiment,
Figure 13 is the cut-open view of the piston of the piston flowmeter of the present invention the 4th embodiment,
Figure 14 for the seal pad of the piston of the piston flowmeter of the present invention the 4th embodiment vertical view,
Figure 15 is the view of work side of piston that the piston flowmeter of the present invention the 4th embodiment is shown,
Figure 16 is with the cut-open view in the installing piston into cylinder of the piston flowmeter of the present invention the 4th embodiment,
Figure 17 is the cut-open view on the housing top of the piston flowmeter of explanation the present invention the 5th embodiment.
Embodiment
Below, be described more specifically the present invention by an illustrated embodiment.Fig. 1 and Fig. 2 are the view of the piston flowmeter of explanation the present invention the 1st embodiment, and Fig. 1 is the cut-open view of piston flowmeter, and Fig. 2 is near the view that amplifies the axis hole.
In these views, the piston flowmeter of present embodiment is a kind of flowmeter that has impulse sender, the path of fluids such as fuel oil on being arranged on rotary valve 2 and valve seat 3 that flows into from inflow entrance 1 imports a side the cylinder 6, pressure by this fluid moves a side piston 7, simultaneously, the fluid in the opposing party's cylinder 6 ' is flowed out from flow export 9 through the outflow pathway of rotary valve 2, the central corridor 8 and the crankshaft room 26 of valve seat 3 by the opposing party's path 5.
Then, piston 7,7 ' to-and-fro movement are converted to gyration through connecting link 10 and pass to bent axle 11, to send into next cylinder from the fluid sequence ground that inflow entrance 1 flows into by the rotary valve 2 that is installed on the bent axle 11, simultaneously, fluid through crankshaft room 26 to flow export 9 outflows.
At the top of rotary valve 2 driving shaft 12 is housed, turning power is passed to the revolving shaft 28 of the symbol dish 24 that constitutes flow pulse trigger mechanism described later.
Symbol 13 is a housing among the figure, and this housing 13 is separated into body case 16 and loam cake 17 by having the valve chamber 15 of taking in piston 7,7 ' cylinder 6,6 ' measuring room 14 and taking in rotary valve 2.2 cylinders other on the measuring room 14 with cylinder 6,6 ' perpendicular formation, and take in the piston that is installed on the connecting link 10 '.Constitute in the loam cake 17 of valve chamber 15, its top forms as one with the housing section 17a that takes in the flow pulse trigger mechanism, and its upper opening is by top shell 21 sealings, to form withstand voltage explosion-proof cell 20.
Form respectively on the connecting link 10,10 ' and each piston 7,7 ' the corresponding hole 10a that grows crosswise of stroke, 10 ' a, the crank pin 11a, the 11 ' a that are arranged on the bent axle 11 are intercalated among this hole 10a that grows crosswise, 10 ' a by the gap.In addition, guarantee piston 7,7 ' the certain upper dead center restrictions 16a of stroke, 16b being provided with cylinder 6,6 ' the mutually opposed place of top inner surface.One side's upper dead center restrictions 16a makes the projection tab with the contacted definite shape in end of connecting link 10, and the opposing party's upper dead center restrictions 16b forms the screw that contacts by the end with connecting link 10 and can adjust its position from the outside.In addition, this upper dead center restrictions 16b by after adjustment with can not be sealed like that from outside adjustment once more.
The loam cake 17 that forms valve chamber 15 and withstand voltage explosion-proof cell 20 is provided with the axis hole 22 of perforation, passes aforesaid driving shaft 12 in this axis hole 22.Driving shaft 12 is sealed pivotally by the seal member 23 that is arranged on valve chamber 15 1 sides, and its lower end is positioned at the top of rotary valve 2, and the upper end is projected in withstand voltage explosion-proof cell 20, and the upper end is provided with shaft coupling 29a.
The upper end of driving shaft 12 be installed to pivotally on the top shell 21 by shaft coupling 29a and top, and the lower end has shaft coupling 29b, and is connected with the revolving shaft 28 of mark-hold dish 24.On top shell 21, fixing the testing agency 25 of the symbol that detects symbol dish 24, by running through through hole 21a that wears on the top shell 21 and the cable 27 that seals by seal member 31, so that flow pulse is exported to the outside.
As required, can revolving shaft 28 is outstanding to the outside through seal member 32 from the top through hole 21b of top shell 21, this outstanding end links to each other with mechanical counter 30.
And spring bearer plate 34 is equipped with on the top that is positioned at the driving shaft 12 on the valve chamber 15, and pressing plate is caught the upper end of spring 33, and spring 33 is with rotary valve 2 and valve seat 3 crimping.
In the piston flowmeter of said structure, owing to be opposite to the upper dead center restrictions 16a that cylinder 6,6 ' top underside place are provided with limited piston 7,7 ' stroke, 16b, by from the liquid mobile piston 7,7 ' of inflow entrance 1 in rotary valve 2 sequentially flows into cylinder 6,6 ', when piston 7,7 ' arrives upper dead center, with upper dead center restrictions 16a, the 16b contact, owing to can not more than it, move, make piston 7,7 ' stroke keep necessarily can not reducing precision.And the crank pin 11a, the 11 ' a that are arranged on the bent axle 11 are intercalated among the hole 10a that grows crosswise, the 10 ' a on the piston 7,7 ' by the gap, thereby even limited piston 7,7 ' upper dead center position, also can be suitable.Thereby the wearing and tearing because of crank pin 11a, 11 ' a, the hole 10a that grows crosswise, 10 ' a or connecting link 10,10 ' parts such as bearing can not reduce precision.
Owing to adopt such casing structure, top shell 21 is under the opened state, the shaft coupling 29a of driving shaft 12 front ends exposes, the top shell 21 that only will be assembled with symbol dish 24, symbol detection mechanism 25 and cable 27 the shaft coupling 29b that makes revolving shaft 28 lower ends be fixed on the housing section 17a after shaft coupling 29a combines, just the flow pulse trigger mechanism can be installed on the flowmeter bodies simply.In addition, when maintenance or maintenance, only take off top shell 21, just can overhaul symbol dish 24 or symbol detection mechanism 25.
In the present embodiment, the fluid that flows into from inflow entrance 1 flows into the cylinder 6 selectively by rotary valve 2 so that piston 7 slides, with the proportional speed of flow under, turning crankshaft 11.This revolution passes to withstand voltage explosion-proof cell 20 by driving shaft 12, so that be accommodated in this symbol dish 24 revolutions.
Thus,,, be sent to not shown mensuration mechanism, show, and represent the revolution of accumulation by mechanical counter 30 as flow by cable 27 from 25 outputs and the proportional flow pulse of flow of symbol detection mechanism.
Although in this valve chamber 15, be full of the fluid that is enough to make under the pressure that piston 7 slides is arranged,, can stop fluid from valve chamber 15 outflows owing between driving shaft 12 and valve chamber 15, be provided with seal member 23.
At this, even because of sealing forces such as seal member 23 variation in time descend, fluid or steam are impregnated in the axis hole 22, and can flow in the withstand voltage explosion-proof cell 20, but, just can not invade in the withstand voltage explosion-proof cell 20 owing to can evaporate into outside the housing from the through hole 22a on being located in axis hole 22 sidepieces.
In addition, in the above-described embodiment, it is that example is illustrated that rotary valve 2 and valve seat 3 are disposed at cylinder 6 tops, but also can adopt the mode that rotary valve 2 and valve seat 3 is arranged on cylinder 6 belows.In addition, in the present embodiment, be to be the explanation that example is carried out, equally also applicable to 2 pistons or a plurality of piston with 4 pistons.
Fig. 3～Fig. 6 is the view of the piston flowmeter of explanation the present invention the 2nd embodiment, Fig. 3 is the cut-open view of the withstand voltage explosion-proof cell part of piston flowmeter, Fig. 4 is the skeleton view that the top is shown, Fig. 5 is the cut-open view that near each parts of arrestment mechanism are shown, and Fig. 6 is the skeleton view that other embodiment of keep plate are shown.In addition, part and the identical symbol of parts employing corresponding to the 1st embodiment at this, omit detailed description thereof.
In these views, the structure of the piston flowmeter of present embodiment and the 1st embodiment's is roughly the same, has just improved to prevent the free rotating arrestment mechanism of revolving shaft.On top shell 21, be fixed with the symbol detection mechanism 25 of the symbol that detects symbol dish 24, by flow pulse being exported to the outside by the cable 27 of seal member 31 sealing.
Near the revolving shaft 28 that passes top shell 21, inside and outside keep plate 35 through polishing processing is with perpendicular to the mode of revolving shaft 28, be fixed on a plurality of protuberance 21a that form on the top shell 21 by bolt 36.In addition, in the present embodiment, revolving shaft 28 forms as one with driving shaft.Much less, compare with the polishing processing that carry out in required zone on the housing of abnormal shape, polish processing and want simple many on sheet material, therefore, the cost of the slipping plane of processing keep plate 35 is lower.
In addition, revolving shaft 28 form section " D " font from the outstanding zones of top shell 21, brake pad 37,38 is crimped onto the upper surface of keep plate 35 and the mode of lower surface is installed.
The brake pad 37 of lower surface passes through E type ring 40 through packing ring 39, limited revolving shaft 28 towards axial moving, and brake pad 38 its tops of upper surface are by E type ring 41, limited revolving shaft 28 towards axial moving, and under the effect of the pressed part 50 that constitutes by spring base portion 42,43 and volute spring 44, be crimped onto on the keep plate 35.In addition, symbol 45 is expressed as the connector that is installed on revolving shaft 28 upper ends among the figure.Other structures are identical with the 1st embodiment.
In the present embodiment, the fluid that flows into from inflow entrance 1 flows into the cylinder 6 selectively by rotary valve 2 so that piston 7 slides, and with the proportional speed of flow under, turning crankshaft 11.This revolution rotates symbol dish 24 and 2 brake pads 37,38 through revolving shaft 28.In addition, because keep plate 35 is from the clamping of inside and outside two sides by 2 pads 37,38, thereby long-time use also can prevent its distortion.
Thus, export and the proportional flow pulses of flow from symbol detection mechanism 25, and be sent to not shown mensuration mechanism, show, and as required, drive the not shown mechanical counter that links to each other with connector 45 as flow by cable 27.
Although revolution by revolving shaft 28, brake pad 37,38 turns round in the mode of compacting keep plate 35, can produce certain friction torque, but because of keep plate 35 has carried out polishing processing, can not produce powder, thereby the bearing 46 that is arranged under it can not immerse the foreign matter of separating from brake pad 37,38.
In addition, flow under the state stop at fluid, revolving shaft 28 is accepted friction force by 2 brake pads 37,38, thereby the revolution that causes such as can prevent to vibrate reliably.In addition, the planar portions 28a of spring base portion 42,43 that keeps volute spring 44 by forming, make that section is that the revolving shaft 28 of " D " font axially can not move, but but setting-in become to make and can not relatively move between itself and the revolving shaft 28 and can turn round synchronously with revolving shaft 28.Thus, can not produce reversing of volute spring 40 that the friction because of brake pad 38 causes, in the moment that flow measurement finishes, revolving shaft 28 can not reverse yet.
In the above-described embodiment, be at the two sides of keep plate 35 crimping brake pad 37,38, even but, also can prevent freely turning round of revolving shaft only at the one side crimping brake pad of keep plate 35.
In addition, in the above-described embodiment, keep plate 35 is flat, but as shown in Figure 6, keep under the sliding contact surface situation of brake pad 37,38, when forming window 35a in its vicinity, can guarantee elasticity with the sliding contact surface of brake pad 37,38, the difference of the pushing force of up and down brake pad 37,38 is absorbed as bending, can be prevented one-sided wearing and tearing.
Fig. 7～Figure 11 is the view of the piston flowmeter of explanation the present invention the 3rd embodiment, Fig. 7 is a sectional view of analysing and observe the upper body of piston flowmeter, the vertical view of Fig. 8 for looking from the lid side, the backplan of Fig. 9 for looking from base side, Figure 10 is the view that illustrates under the return slot plate assembled state, and Figure 11 is the cut-open view of the amplification of photoreceptor mounting hole.
The piston flowmeter of present embodiment is improved the structure of the impulse sender that is arranged on top, impulse sender 51 of the present invention is by constituting as lower member, by body 53 and lid 54 upper body that constitute 52, be installed to symbol boards 70 on the revolving shaft 58, be arranged on and cover the luminophor 55 in 54 and be arranged on the interior photoreceptor 56 of body 53.This symbol dish 70 in housing 52 along with the revolution of revolving shaft 58, but by free rotaring ground supporting.Symbol boards 70 by the keyway 80 that forms proper number at central part and opening 82 and circumference form a plurality of slits 72 disk 73 (being generally metal makes), support the supporting core 74 of this disk 73 and constitute from the pressing plate portion 75 that this disk 73 is being supported in the opposition side pushing.Supporting core 74 is by passing axle 58 hub portion 76 and pressing plate portion 77 and constituting with the corresponding key of the keyway 80 of disk 73 portion 81 thereon, and at opening 78 that forms the hub portion 76 of accepting supporting core 74 on the pressing plate 75 and a plurality of breach 79 on its circumference.
Figure 10 is the view that illustrates under these symbol boards 70 preceding states of assembling.An example that is formed on the slit 72 on the disk 73 is with 7.2 degree pitches 50 slits to be set.Pressing plate 75 is made by more resilient synthetic resin.
The upper body 52 of impulse sender 51 of the present invention is made of body 53 and the lid 54 that can seal thereon.To insert and be fixed in this housing 52 for 2 luminophors 55,55 and photoreceptor 56,56 respectively by moulded parts such as epoxy resin 57,57.Each luminophor 55,55 and photoreceptor 56,56 opposite disposed, the former is arranged on covers in 54, and the latter is arranged in the body 53, is about the angle configuration apart of 27 degree with the center of housing 52.As luminophor 55 is light emitting diode, is phototransistor as photoreceptor 56.The body 53 that constitutes this housing 52 is by bottom surface sections and circumferential side wall face cup-shaped that constitute, the top opening, form the photoreceptor of accepting photoreceptor 56,56 at assigned position and insert fixed orifice 90,90, form wheel hub 60 with through hole 59 at central part, in through hole 59, insert the revolving shaft 58 that links to each other with driving shaft such as flowmeter, in addition, also avoiding above-mentioned photoreceptor at circumference inserts fixed orifice 90,90 ground and forms a plurality of, the hole 61 of 3 insertion impulse sender hold-down barss preferably.The top open end of the circumferential side wall face of body 53 forms a plurality of less grooves 62 and the big slightly groove 63,63 that compares, these groove symmetric arrangement.In illustrated embodiment, sulculus 62 forms 4, they give body 53 when lid 54 embeds in the bodies 53 fitting portion elastic force, and in addition, vat 63,63 forms 2, is used as and is formed on 2 engages tab, 64,64 concavo-convex joints of covering on 54.In addition, cover 54 chimericly reliably, near the interior Zhou Shangduan of the circumference wall of body 53, form circumferential groove 65, and be formed on circular protrusion 66 concavo-convex joints of covering on 54 the periphery with body 53 in order to make.Lid 54 is by constituting for and top part facial corresponding to the facial and open downwards circumferential side wall of the circumferential side wall of body 53, form the luminophor of accepting luminophor 55,55 on fixed orifice 90, the 90 corresponding positions and insert fixed orifice 67,67 inserting, form the bearing portion 68 of extending the input shaft 58 that comes of accepting from the through hole 59 of body 53 at core with the photoreceptor of body 53.On this lid circumference wall of 54, form as described above like that, with larger slot 63, the 63 corresponding engages tab 64,64 and the circular protrusions 66 of body 53.
The enlarged drawing that the photoreceptor of body 53 inserts fixed orifice 90 as shown in figure 11, its photoconduction inlet is made of inclinations that become 45 degree approximately facial 83 and the continuous with it undergauge peristome 84 that forms.Usually, the diameter of photoreceptor patchhole 90 is about 2～3mm φ, but the opening diameter of undergauge peristome 84 is preferably about 0.8mm φ.
As above-mentioned, the impulse sender 51 of piston flowmeter of the present invention for example is applicable to the revolution of the driving shaft that obtains the revolution flowmeter, send and the proportional pulse of its winding number, owing to need not to be provided with the cover tool of such in the past split, undergauge peristome and photoreceptor insertion fixed orifice are formed as one, can reduce part count, also can reduce the assembling procedure number, can make at low cost.In addition, the cover tool occasion of split is being arranged, the location during assembling is difficult to, but in the present invention, can not have the good pulse of this shortcoming.Have again,, be convenient to assembling because of body is concavo-convex the joint with the chimeric of lid.
Figure 12～Figure 16 is the view of the piston flowmeter of explanation the present invention the 4th embodiment, Figure 12 is the vertical view of piston, and Figure 13 is the cut-open view of piston, Figure 14 be piston seal pad vertical view, Figure 15 is the view of piston production method, and Figure 16 is the cut-open view in the cylinder that piston set is packed into.In addition, be marked with identical symbol,, omit its explanation at this with corresponding part of the 1st embodiment and parts.
In the piston flowmeter of present embodiment, the piston structure of the 1st embodiment is improved.Shown in these views, the piston 101 of flowmeter of the present invention is made of the annular sealing plate 103 of the discoid piston only 102 of the oil resistance synthetic resin of hard and soft oil resistance synthetic resin, and piston only 102 forms as one with it by the mode of injection moulding with the interior perimembranous 103a that buries seal pad 103 underground.Because piston only and seal pad so form as one, leakage can not take place with the composition surface of piston only in seal pad, can become the piston cheaply that needn't assemble.
As the hard oil resistance synthetic resin that forms piston only 102, for example preferably use, can be in polyphenylene sulfide (PPS), nylon 66, nylon 46 the material, liquid crystal liquid crystal property aromatic polyester resins, polyamide-imide, poly-imines, polyethers nitrile etc. of supporting material such as filled glass fiber.
As the oil resistance synthetic resin of the softness that forms seal pad 103, preferably for example use polytetrafluoroethylene (PTFE), tetrafluoroethene perfluoroalkyl vinethene copolymer (PFA), tetrafluoroethene hexafluoropropylene copolymer fluoroplasts such as (FEP).
Piston only 102 is at central part formation piston rod mounting hole 102a, to form the 1st flange 102b that diameter d 1 is about 70mm on the one side of circumferential end, formation diameter d 2 to the 1 flange 102b the 2nd flange 102c little, about 64mm on another side.And, between hole 102a and each flange 102b, 102c, be provided with muscle 102d, 102e.Periphery at piston only is provided with flange like this, and is provided with muscle between hole and flange, can obtain full intensity as the piston of flowmeter.
The making of this piston as shown in figure 15, metal die 105a with the grasping part of formingspace with piston only 102 and seal pad 103, the peripheral part 103b of seal pad 103 in the 105b clamping, injects the oil resistance synthetic resin of hard with injection moulding in the formingspace of piston only 102.
Then, as shown in figure 16, the peripheral part 103b of the seal pad 103 of piston 101 towards the 2nd flange 102c lateral bending song, with among the connecting link 10 patchhole 102a and fixing with nut 107, is assembled in the cylinder 6.Like this since seal pad peripheral part towards the 2nd flanges flex, seal pad the length of bend elongated, elasticity increases, and improved the sealing with cylinder one surface, and this preferable sealing property can keep for a long time.
Thereby, on the composition surface of seal pad and piston only the phenomenon of leakage can not take place, reduced part count and assembly process, can obtain the piston of flowmeter cheaply.
Figure 17 is the cut-open view on the housing top of the piston flowmeter of explanation the 5th embodiment of the present invention.
The structure of this flowmeter is, by the liquid that flows into from inflow entrance 111 with the housing 110 of the same piston flowmeter of the 1st embodiment, the to-and-fro movement of not shown piston converted to through bent axle make driving shaft 112 revolutions, the revolution of this driving shaft 112 passes to the revolving shaft 113 that is arranged on driving shaft top by the magnetic coupling body.
One side is formed with the measuring room of the cylinder of taking in not shown piston and takes in the valve chamber of rotary valve housing 110 in the bottom, form the receiving room of taking in the magnetic coupling body 114 of side opening in top one side, and partly form flange part 116 at upper opening.In addition, at the central part formation axis hole 115 of housing 110, but this axis hole 115 driving shaft 112 by bearing 117 free rotaring ground supportings.The upper end of this driving shaft 112 forms like that in the face of receiving room 114.
The magnet cover 119 of taking in the 1st ringshaped magnet 120 is accommodated in the receiving room 114 in the mode that can be installed to the upper end of driving shaft 112 freely to rotate.This magnet cover 119 is, make top one side be accommodated in last side opening in the receiving room 114, and form the 1st magnet receiving room 119a cylindraceous that takes in the 1st ringshaped magnet 120, bottom one side forms and the chimeric axial region 119b in driving shaft 112 upper ends, the bearing 118 of axis hole 115 upsides of its axial region 119b by being arranged on housing 110 can be installed with freely to rotate.
In addition, in taking in the 1st magnet receiving room 119a of the 1st ringshaped magnet 120, on the revolving shaft 113 of central shaft, be provided with the magnet frame 121 that the 2nd ringshaped magnet 124 is set.This magnet frame 121 is, bottom one side direction upper shed and form the 2nd magnet receiving room 121a, the big I of magnet receiving room 121a is arranged in the 1st magnet receiving room 119a that takes in the 1st ringshaped magnet 120, and the opening periphery of one side forms flange part 121b on top.In the 2nd magnet receiving room 121a, be provided with the revolving shaft 113 coaxial with the central shaft of driving shaft 112, but the bottom of revolving shaft 113 by bearing 122 free rotaring ground supportings that are arranged on magnet receiving room 121a bottom, and the upper end is outstanding from opening, and the 2nd ringshaped magnet 124 is installed on this revolving shaft 113.Magnet frame 121 contacts the 121b of upper flange portion by encapsulant 128 and is fixing by bolt 126 with the flange part 116 of housing 110.In addition, upper end one side of revolving shaft 113 directs into by Screw 127 and is installed in the axle sleeve 125 of opening part of magnet frame 121, and outstanding to the outside.The 2nd ringshaped magnet 124 forms the state that combines with the 1st ringshaped magnet 120 magnetic.In addition, illustrated flow pulse transmitter or the mechanical counter 30 of aforementioned each embodiment installed in the upper end of revolving shaft 113.
In the piston flowmeter of said structure, by flowing into the liquid of inflow entrance 111, during driving shaft 112 revolutions, the just revolution of magnet cover 119 in the receiving room 114 of housing 110 is accommodated in the also just revolution of the 1st ringshaped magnet 120 in this magnet cover 119.The 1st ringshaped magnet 120 revolution in a single day, the 2nd ringshaped magnet 124 of the combination of magnetic with it that is provided with on the magnet frame 121 also just together turns round with revolving shaft 113.Therefore, flow pulse transmitter or mechanical counter 30 are installed by top at this revolving shaft 113, but with regard to calculated flow rate.In the piston flowmeter of present embodiment, driving shaft 112 mechanically separates with revolving shaft 113, and revolving shaft 113 is arranged in the 2nd container-like magnet receiving room 121a of last side opening of magnet frame 121, and the flange part 121b on top is fixed on the flange part 116 of housing 110 by encapsulant 128, thereby the leakage that the wearing and tearing of the encapsulant of driving shaft 112 sides etc. cause can not drain to revolving shaft 113 sides.The piston flowmeter of present embodiment is compared with the fueller of gasoline, is applicable to the flowmeter that uses on the fueller of the liquefied petroleum gas (LPG) of making high pressure.
As above-mentioned, piston flowmeter of the present invention can be guaranteed the reliability of variable by above-mentioned structure, can make equipment miniaturization and low cost.
Claims (6)
1, a kind of piston flowmeter, will be in a plurality of cylinders the connecting link of pistons reciprocating convert the gyration of driving shaft to by bent axle, make the revolving shaft revolution of flow measurement mechanism by this driving shaft, it is characterized in that, form the hole of growing crosswise on the described connecting link corresponding to throw of poston, be arranged on crank pin on the bent axle by the gap intercalation in this grows crosswise the hole, and be provided with the upper dead center restrictions of piston in the position of the top inner surface that is opposite to described cylinder.
According to the described piston flowmeter of claim 1, it is characterized in that 2, described upper dead center restrictions forms can adjust the position from the outside.
3, according to the described piston flowmeter of claim 1, it is characterized in that, it is outstanding to the outside of the housing that is provided with flow measurement mechanism that described revolving shaft is arranged to its end, and near the revolving shaft of this housing perpendicular to described revolving shaft keep plate is set, on described revolving shaft, be provided with the pressed part of suppressing described keep plate by brake pad.
4, according to the described piston flowmeter of claim 1, it is characterized in that, described flow measurement mechanism is by luminophor, photoreceptor constitutes with the impulse sender that is disposed at the return slot dish that slit is arranged between the two and they are accommodated in the housing, form the luminophor patchhole in described case lid side, the photoreceptor that is formed with the undergauge peristome in described enclosure body side inserts fixed orifice, and described return slot dish has by connecting the supporting core that all-in-one-piece hub portion and pressing plate portion and key portion constitute with described revolving shaft, form opening and the keyway that engages with the key portion of supporting core and the disk that forms a plurality of slits at circumference of the hub portion of passing described supporting core at central part, also constitute with the opening that forms the hub portion of accepting described supporting core at central part with the pressing plate of the pressing plate portion of the supporting core described disk of clamping together.
5, according to the described piston flowmeter of claim 1, it is characterized in that, described piston is constituted by the seal pad of the ring-type of the discoid piston only of the oil resistance synthetic resin of hard and soft oil resistance synthetic resin, described piston only by injection moulding be embedded in seal pad interior perimembranous to be integral with it.
6, a kind of piston flowmeter, will be in a plurality of cylinders the connecting link of pistons reciprocating convert the gyration of driving shaft to by bent axle, make the revolving shaft revolution of flow measurement mechanism by this driving shaft, it is characterized in that, the housing on the top of described driving shaft forms the receiving room of upper opening, inside at this receiving room, magnet cover with the 1st magnet receiving room of taking in the 1st ringshaped magnet can be installed on freely to rotate described driving shaft the upper end be contained, in described the 1st magnet receiving room, make the 2nd ringshaped magnet and central shaft coaxial, the revolving shaft of installing with described the 1st ringshaped magnet face-off ground is accommodated on the magnet frame freely to rotate, magnet frame is by being arranged on the flange part of upper side, be installed to the upper end of housing by means of encapsulant, and the upper end of described revolving shaft is directed in the axle sleeve and outstanding to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105921 CN1259549C (en) | 2002-04-09 | 2002-04-09 | Piston flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105921 CN1259549C (en) | 2002-04-09 | 2002-04-09 | Piston flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450342A true CN1450342A (en) | 2003-10-22 |
| CN1259549C CN1259549C (en) | 2006-06-14 |
Family
ID=28680097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02105921 Expired - Lifetime CN1259549C (en) | 2002-04-09 | 2002-04-09 | Piston flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259549C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052945A (en) * | 2009-10-07 | 2011-05-11 | 德莱赛稳公司 | Fluid meter |
| CN103298732A (en) * | 2010-12-28 | 2013-09-11 | 德莱赛稳公司 | Fluid meter with improved piston guidance |
| CN103298733A (en) * | 2010-12-28 | 2013-09-11 | 德莱赛稳公司 | Piston fluid meter with improved yoke arrangement |
-
2002
- 2002-04-09 CN CN 02105921 patent/CN1259549C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052945A (en) * | 2009-10-07 | 2011-05-11 | 德莱赛稳公司 | Fluid meter |
| CN102052945B (en) * | 2009-10-07 | 2014-06-11 | 德莱赛稳公司 | Fluid meter |
| CN103298732A (en) * | 2010-12-28 | 2013-09-11 | 德莱赛稳公司 | Fluid meter with improved piston guidance |
| CN103298733A (en) * | 2010-12-28 | 2013-09-11 | 德莱赛稳公司 | Piston fluid meter with improved yoke arrangement |
| CN103298732B (en) * | 2010-12-28 | 2015-07-01 | 韦恩加油系统瑞典公司 | Fluid meter, multi-fluid meter components, and fuel distribution unit for adding fuel to vehicle |
| CN103298733B (en) * | 2010-12-28 | 2015-09-09 | 韦恩加油系统瑞典公司 | Flow counter, multithread gauge assembly and fuel allocation units |
| US9222818B2 (en) | 2010-12-28 | 2015-12-29 | Wayne Fueling Systems Sweden Ab | Fluid meter with improved piston guidance |
| US9540224B2 (en) | 2010-12-28 | 2017-01-10 | Wayne Fueling Systems Sweden Ab | Fluid meter with improved piston guidance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259549C (en) | 2006-06-14 |
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