CN208688589U

CN208688589U - A kind of graphite blade flowmeter

Info

Publication number: CN208688589U
Application number: CN201821551853.4U
Authority: CN
Inventors: 涂汉炯; 李津泽; 敖千; 张智友
Original assignee: Chongqing Endurance Industry Stock Co Ltd
Current assignee: Chongqing Endurance Industry Stock Co Ltd
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2019-04-02
Anticipated expiration: 2028-09-21

Abstract

The utility model discloses graphite blade flowmeter, including measuring room component, gauge outfit and adjusts poor component, measuring room and is mounted on the indoor rotor assembly of metering；Measuring room includes measuring room cavity and the inlet and outlet that is respectively communicated with measuring room cavity, and the inlet and outlet is arranged on the side wall of measuring room cavity；Rotor assembly includes the cylindrical core and a pair of of blade member of cylindrical shape, this is in be set in cylindrical core cross-shapedly to blade member, and each piece of blade member can radially slide in cylindrical core along cylindrical core, the poor component of the tune includes main shaft, axially mounted on main shaft to have the first gear connecting with the rotating shaft transmission of rotor assembly, the second gear being sequentially connected with gauge outfit input shaft, a pair of spaced apart third gear and the frictional disk positioned at main shaft bottom end.The measuring room component has many excellent properties such as measuring accuracy is high, error compensation is good, reliability is good.

Description

A kind of graphite blade flowmeter

Technical field

The utility model belongs to blade flowmeter technical field more particularly to a kind of graphite graphite blade flowmeter.

Background technique

Blade flowmeter is a kind of higher volumetric flowmeter of measuring accuracy, at present using it is relatively broad be using convex The metal scrape plate flow meter of wheel construction, with surging, the work also higher and higher to the measuring accuracy of blade flowmeter of oil price The metering room housing of one of kernel component for metering, also requires higher and higher metering performance therewith.Existing scraper plate stream Meter, structure are usually " CN102721442A " and " CN2748875Y " " CN206919952U " such as Authorization Notice No., i.e., Measuring room cavity with a similar cylindrical cavity is each provided with for a feed liquor and out liquid in the two sides of cavity Entry/exit runner, measuring room is interior to be equipped with the metallic rotator component for being located at the intracorporal slidable metal plate composition of cylinder, such The measuring room component of structure is traditional design structure, and the metering more stable for current fuel oil higher precision is uncomfortable already With causing the fuel oil of two sides mutual for example, being easy that there are measuring room inside cavities cannot effectively separate between import and export Channelling influences the measuring accuracy of its volumetric metering.Such as " CN102721442A " and " CN2748875Y " The blade flowmeter of " CN206919952U " etc, the movement of the scraper plate of rotor assembly are all by a cam as profiling The pattern of movement determines the motion profile of scraper plate from the geometry of cam completely, is easy because cam etc. is associated Component abrasion and cause precision impaired, for measuring room when with rotor engagement, the contact between inner wall and rotor scraper edge is difficult To remain in sealing contact, causes the measuring chute surrounded between rotor scraper plate and metering chamber interior walls sufficiently closed, exist Leakage and the risk for influencing precision, in addition, existing blade flowmeter do not have also for the compensation way of measuring accuracy it is comparatively ideal Structure type, the precision largely measured only rely only on the measuring accuracy of measuring room component itself.It would therefore be highly desirable to design A kind of novel flowmeter meets ever-increasing metering requirements.

Utility model content

Utility model aims to solve above-mentioned technical problems, provide a kind of graphite blade flowmeter, the flowmeter With many excellent properties such as precision is high, stability is good, error compensation is good.

The technical solution of the utility model is as follows:

A kind of graphite blade flowmeter including measuring room component, adjusts poor component and shows the gauge outfit of metering reading, measuring room Component is by adjusting the input shaft of poor component and gauge outfit to be sequentially connected；

The measuring room component includes being located to measure indoor rotor assembly in measuring room；

The measuring room includes measuring room cavity and the inlet and outlet that is respectively communicated with measuring room cavity, the import and Outlet is arranged on the side wall of measuring room cavity；Measuring room cavity cross section is in cam contour shape, and the cam contour is by 4 Curve surrounds, including the first curve that radius is r, radius be R third curve and R > r, the first curve and third curve are just The center of circle of setting and the first curve is located in the shaft of measuring room inner rotator, between the first curve and third curve respectively Identical equipped with shape and the arrangement that is mutually symmetrical the second curve and the 4th curve, so that four curves surround the cam contour Curve；

The rotor assembly includes the cylindrical core and a pair of of blade member of cylindrical shape, this hands over blade member in cross It is set in cylindrical core forkedly, and each piece of blade member can radially slide in cylindrical core along cylindrical core；

Cylindrical core, including the through-hole being arranged along its central axes, interference fit has shaft in through-hole, and shaft is equipped with two groups Perpendicular to one another and disjoint perforation, cylindrical core respectively offer one at two mutually perpendicular both ends diametrically The notch of rectangle, the length direction two sides of the notch extend through the upper and lower end face of cylindrical core；

Blade member, including quantity and the consistent connecting rod arranged in parallel of every group of the number of holes, connecting rod two end difference It is connected with the graphite scraper plate of one piece of rectangular plate-like, the graphite scraper plate can be free to slide in the notch；All graphite scraper plates The thrust slot of recess is equipped in face of the side of fluid impact, face is arranged in the thrust slot on two graphite scraper plates of every piece of blade member On the contrary；

All connecting rods of every piece of blade member axially displaceably correspond in one group of perforation being matched therewith, with So that two pairs of blade members in be set in cylindrical core cross-shapedly and every piece of blade member can in cylindrical core edge Cylindrical core radially slides；

The poor component of the tune includes main shaft, the axially mounted on rotating shaft transmission having with rotor assembly on main shaft The first gear of connection；Further include and the second gear of the input shaft of gauge outfit transmission connection, a pair of spaced apart third up and down Gear and the frictional disk being integrally connected with first gear positioned at main shaft bottom end；Wherein, superposed third gear It being fixedly connected with main shaft, the third gear positioned at lower part coaxially connects and is fixed as one with the second gear, and the Two gears can be freely rotated with the entirety that the third gear for being located at lower part is formed around main shaft；Master between two third gears It is rotationally equipped with the 4th gear on transmission shaft, is coaxially equipped with respectively in upper and lower end faces of the 4th gear by its edge One the 5th gear, two the 5th gears, which are mounted on, to be extended vertically through in the both ends of the shaft on the 4th gear, and two the 5th gears with It is all that two thirds gear arranged up and down corresponds engagement, so that main drive shaft can pass through the third tooth on top when rotating The third gear engaged transmission of the 5th gear and lower part for engaging to drive lower part between wheel and the 5th gear on top；

4th gear is engaged with the 6th gear of the counter drive shaft upper end for being parallel to main shaft setting, counter drive shaft The turbine of bottom end is connect with worm-drive, and worm screw is equipped with thread segment, and being combined with wheel rim on thread segment can be with the frictional disk bottom The friction pulley that end face connects, friction pulley are embedded with worm screw when preventing friction pulley from rotating that one is tightly placed on thread segment relative to rubbing The friction sleeve that wheel skids is wiped, is additionally provided with a dismountable guide rod on the direction parallel with worm screw, on bracket and friction pulley Through-hole equipped with one for guide rod insertion, turns worm screw and makes the hole on friction pulley and bracket can be with co-axially align so as to rapid It is inserted into guide rod.

Preferably, the expression formula of the curve ρ 1 of second curve and the 4th curve are as follows:

In the above parameter, L is the half of scraper thickness, and θ 1 is the second curve or point and the first curve on the 4th curve Angle between the center of circle between line and X-axis, Y-axis corresponding to the X-axis are the symmetry axis between second, the 4th liang of curve Line.

Further, the import is by first arc-shaped diversion trench and measuring room cavity connection, and described first Diversion trench is an interlayer space in the metering room housing of the first curve position.

Further, second curve and the 4th curve include leading portion and back segment, wherein for the second curve, Leading portion is connected with first curve one end, and back segment is connected with third curve one end；For the 4th curve, leading portion and third curve The other end is connected, and back segment is connected with the other end of the first curve；It is led for described first the leading portion region of second curve Intersectional region between chute and measuring room cavity, section is located at radially projecting in spaced in metering chamber interior walls thereafter On several layers water conservancy diversion gusset, which is surface where back segment in circular arc plate and its circular arc concave surface；Adjacent two fuisw rib It is the second diversion trench that arc-shaped groove is formed by between plate, and second diversion trench is smoothly mutually connected into one with the first diversion trench Body, intersectional region of the intersection between first diversion trench and measuring room cavity between two diversion trenches.

Further, the leading portion position of the 4th curve also is provided with several water conservancy diversion gussets, the second curve and Symmetrical about the axis of symmetry between two groups of water conservancy diversion gussets on four curves, the back segment of the 4th curve leans on the part of the first curve The metering room housing of institute's face is equipped with the separation muscle for separating the inlet and outlet, and the separation muscle is in " people " font, Its tip portion separates the inlet and outlet, two towards one extended on the inside of measuring room in curved two branch with Metering chamber interior walls where the interlayer space are linked together, and another article of leading portion bending towards the 4th curve extends and do not protrude into meter Measure chamber body in so that between two branches one buffer fluid of shape buffer area.

Further, mode is connected and fixed between the graphite scraper plate and connecting rod are as follows: width of the connecting rod along graphite scraper plate Direction is inserted through thrust slot, and the positioning ring end face that graphite scraper plate is arranged on the side of shaft and connecting rod connects, described to push away It is also fixedly inserted with locking pin on connecting rod in power slot, between the inner wall of the locking pin and thrust slot by positioning ring side The holddown spring that be locked pin and thrust slot inner wall press also is cased on connecting rod, so that graphite scraper plate is fixed on interlinking lever end.

Further, a sliding sleeve is equipped in the cylindrical core at the both ends of each perforation of the shaft, it is described Sliding sleeve is screwed in cylindrical core and is coaxially disposed with perforation, and the inner hole of sliding sleeve is for connecting rod along axially free sliding.

Further, it is screwed with locking nut and adjusting nut by the part of the graphite scraper plate in connecting rod at least one end, institute The wherein one end for stating adjusting nut, which connects away from a side end face of graphite scraper plate with the positioning ring and generates to graphite scraper plate, to be squeezed Pressure and realizing adjusts graphite scraper plate in the function of interlinking lever end installation site, the locking nut and adjusting nut close proximity with Realization is locked to adjusting nut and graphite scraper plate.

Further, the wheel rim of the friction pulley can connect in semicircle shape and its circular arc vertex with frictional disk bottom face, institute The free end for stating worm screw, which is equipped with, turns portion for what spanner turned.

Further, the measuring room component is at least provided with two, and all measuring room components are coaxially arranged in series, and institute Some rotor assembly are coaxially attached in same shaft, 3 degree of rotational offset between adjacent two rotor assembly.

The utility model has the beneficial effects that the utility model is cooperated using special measuring room and rotor assembly, and Be aided with the poor component compensation error of special tune, it can be achieved that it is following the utility model has the advantages that

1, the first diversion trench makes more stable into the indoor fluid of metering, and effectively guarantees effective between inlet and outlet Partition, can preferably fit together when graphite scraper plate is at third curve, so that metering is more accurate.

2, the second diversion trench can guarantee that liquid does not act on power on the curved surface of scraper plate, influence scraper plate and the fitting of third curve Together, thrust F2 is gradually increased by diversion trench.

3, aerial drainage gas pressure relief slot gradually pressure release reduce act on graphite scraper plate push away F4, bounce back convenient for scraper plate.

4, erosion control block, buffer area prevent impact of the outlet liquid to rotor assembly, shake back and forth to avoid rotor assembly.

5, the first curve negotiating and cylindrical core external cylindrical surface phase inscribe form sealing, to guarantee the partition of inlet port, shape At pressure difference.

6, second, four curves make blade member ensure that graphite scraper plate to radially slide brief acceleration as small as possible It is steady as far as possible in this two sections of curvilinear motion contacts.

7, third curve is as metering curve, scraper plate in this region, due to gravity, centrifugal force and, the effect of liquid thrust Lower graphite scraper plate is fitted on curve always.

8, the design of graphite blade surface thrust slot, increasing action preferably paste scraper plate and curve in the thrust of scraper plate It is combined.

9, in rotor assembly, the sealing between connecting rod and cylindrical core is sealed using loop graphite bearing, both can guarantee Effect sealing, can also promote sliding flexibility, convenient for manufacture, prevent damage of the connecting rod to bearing in the case where concentricity is inadequate.

10, plural serial stage is in use, 3 degree of rotational offset between adjacent two rotor assembly, to guarantee scraper plate in turning alone Without generating interference, measuring accuracy is reliable and stable for sliding in pilot trench.

Detailed description of the invention

Fig. 1 is the utility model schematic perspective view.

Fig. 2 is the schematic perspective view of the measuring room component of the utility model.

Fig. 3 is the measuring room structural schematic diagram of the utility model.

Fig. 4 is perspective view of the measuring room of the utility model after its vertical axial cutting.

Fig. 5 is the measuring room wherein cross-sectional view of the utility model.

Fig. 6 is the cross-section curve figure of measuring room cavity cam contour shape.

Fig. 7 is the structural schematic diagram of the rotor assembly of the utility model.

Fig. 8 is the structural schematic diagram after two blade members and cylindrical core fractionation.

Fig. 9 is the top view of the rotor assembly of the utility model.

Figure 10 is A-A cross-sectional view in Fig. 8.

Figure 11 is the cross-sectional view of the utility model.

Figure 12 is the stress analysis schematic diagram at the first position of rotor assembly.

Figure 13 is the stress analysis schematic diagram at second of position of rotor assembly.

Figure 14 is the stress analysis schematic diagram at the third position of rotor assembly.

Figure 15 is the stress analysis schematic diagram at the 4th kind of position of rotor assembly.

Figure 16 is discharge capacity account schematic diagram.

Figure 17 is the first derivation schematic diagram of measuring room curve.

Figure 18 is the second derivation schematic diagram of measuring room curve.

Figure 19 is that the third of measuring room curve derives schematic diagram.

Figure 20 is the connection schematic diagram adjusted between poor component and gauge outfit.

Figure 21 is the structural schematic diagram for adjusting poor component.

Figure 22 is the main view for adjusting poor component.

Figure 23 is the side sectional view for adjusting poor component.

Component label instructions: the first curve 1, the leading portion 2 of the second curve, the back segment 3 of the second curve, third curve the 4, the 4th The leading portion 5 of curve, the back segment 6 of the 4th curve, the axis of symmetry 7, the second curve 8, the 4th curve 9, rotor scraper plate 10, import 11, It exports the 12, first diversion trench 13, water conservancy diversion gusset 14, the second diversion trench 15, separate muscle 16, buffer area 17, cylindrical core 18, erosion control Block 19, shaft 21, connecting rod 22, graphite scraper plate 23, locking pin 24, holddown spring 25, thrust slot 26, is lived at aerial drainage gas pressure relief slot 20 It covers graphite bearing 27, positioning ring 28, adjusting nut 29, rectangular notch 1801, gauge outfit 30, adjust poor component 31, main shaft 32, the One gear 33, transition transmission shaft 34, second gear 35, third gear 36, frictional disk 37, the 4th gear 38, the 5th gear 39, pair Transmission shaft 40, the 6th gear 41, worm screw 42, friction pulley 43, guide rod 44, bracket 45, friction sleeve 46.

Specific embodiment

The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the utility model easily.

The utility model is described in further detail with reference to the accompanying drawings and examples:

A kind of graphite blade flowmeter, as shown in Figure 1, including measuring room component, adjusting poor component and display metering reading Gauge outfit, measuring room component is by adjusting the input shaft of poor component and gauge outfit to be sequentially connected.

Wherein, as shown in Fig. 2, the measuring room component includes measuring room and is located at the indoor rotor assembly of metering:

As shown in Fig. 3-6, measuring room includes measuring room cavity and the import being respectively communicated with measuring room cavity 11 and outlet 12, the import 11 and outlet 12 are arranged on the side wall of measuring room cavity；Measuring room cavity cross section is in cam contour Shape, the cam contour are surrounded by 4 curves, including the first curve 1 that radius is r, radius be R third curve 4 and R > r, First curve 1 and the setting of 4 face of third curve and the center of circle of the first curve 1 is located in the shaft of measuring room inner rotator, the It is respectively equipped with that shape is identical and the second curve 8 and the 4th curve 9 of the arrangement that is mutually symmetrical between one curve 1 and third curve 4, with So that four curves surround the cam profile curve.

As shown in Fig. 7-10, the rotor assembly of the graphite blade flowmeter of the present embodiment, the cylinder including cylindrical shape Core 18 and a pair of of blade member, this to blade member in being set in cylindrical core 18 cross-shapedly, and each piece of scraper plate Component can radially slide in cylindrical core 18 along cylindrical core 18.

As shown in Fig. 7-8, cylindrical core 18 includes the through-hole along the setting of its central axes, and interference fit has shaft in through-hole 21, shaft 21 is equipped with two groups of perpendicular to one another and disjoint perforation, and cylindrical core 18 is mutually perpendicular diametrically at two Both ends at respectively offer the notch of a rectangle, the length direction two sides of the notch extend through the upper of cylindrical core 18 Lower end surface, so that weight can be mitigated significantly to enhance the service life of bearing using design empty in outer reality.

As shown in Fig. 7-8, blade member includes quantity and the consistent connecting rod arranged in parallel of every group of the number of holes 22,22 both ends of connecting rod are connected separately with the graphite scraper plate 23 of one piece of rectangular plate-like, and the graphite scraper plate 23 can be in the notch It is free to slide；All graphite scraper plates 23 are equipped with the thrust slot 26 of recess in face of the side of fluid impact, every piece of blade member Face is arranged on the contrary, the thrust slot 26 is preferably stretched under the cooperation of rectangular notch 1801 in thrust slot 26 on two graphite scraper plates 23 Out cylindrical core 18 and cater to the impact of fluid so that when scraper component rotates more reliably between metering chamber interior walls effectively Contact promotes measuring accuracy.

As shown in Fig. 9-10, axially displaceably correspondence matches all connecting rods 22 of every piece of blade member across with it In the one group of perforation closed, so that two pairs of blade members are in and every piece blade member interior set on cylindrical core 18 cross-shapedly It can be radially slided in cylindrical core 18 along cylindrical core 18.

As shown in Figure 20-23, the poor component of the tune includes main shaft 32, axially mounted on main shaft 32 to have The first gear 33 connecting with the rotating shaft transmission of rotor assembly specifically can be first gear 33 and nibble with 34 gear of transition transmission shaft It closes, and transition transmission shaft is coaxially connected with the roller end of rotor assembly.It further include being sequentially connected with the input shaft of gauge outfit 30 Second gear 35, a pair of spaced apart third gear 36 up and down and connecting with first gear 33 positioned at 32 bottom end of main shaft The frictional disk 37 being integrated.Wherein superposed third gear 36 is fixedly connected with main shaft 32, the third positioned at lower part Gear 36 and the second gear 35 are coaxial to connect and is fixed as one, and second gear 35 and the third gear 36 that is located at lower part It can be freely rotated around main shaft 32.The 4th gear is rotationally equipped on main shaft 32 between two third gears 36 38, it is coaxially equipped with the 5th gear 39, two the 5th teeth respectively in upper and lower end faces of the 4th gear 38 by its edge Wheel 39, which is mounted on, to be extended vertically through in the both ends of the shaft on the 4th gear 38, and two the 5th gears 39 be all arranged up and down two Third gear 36 corresponds engagement, so that main drive shaft 32 can pass through the third gear 36 on top and top when rotating 36 engaged transmission of third gear engaged to drive the 5th gear 39 of lower part with lower part between 5th gear 39.

4th gear 38 is engaged with the 6th gear 41 of 40 upper end of counter drive shaft for being parallel to the setting of main shaft 32, The turbine of 40 bottom end of counter drive shaft and worm screw 42 are sequentially connected, and worm screw 42 is equipped with thread segment, and being combined with wheel rim on thread segment can The friction pulley 43 to connect with 37 bottom face of frictional disk, friction pulley 43 are embedded with the friction sleeve being tightly placed on thread segment 46, which can be used rubber and is made, and worm screw 42 is skidded relative to friction pulley 43 when mainly preventing friction pulley 43 from rotating, A dismountable guide rod 44 is additionally provided on the direction parallel with worm screw 42, which is just inserted into when needing to adjust, not It then removes and is placed on one side when needing to adjust, one is equipped on bracket 45 and friction pulley 43 and is led to for what guide rod 44 was inserted into Hole turns worm screw 42 with tools such as spanners when needing to adjust and three holes on friction pulley 43 and bracket 45 is aligned so as to fast Speed insertion guide rod 44.When guide rod 44 is inserted on the fixed bracket 45 for adjusting poor component when needing to adjust 43 position of friction pulley, and it is same When pass through the friction pulley 43, with the tools such as spanner continue rotary worm 42, then friction pulley 43 along worm screw 42 move axially, reach Not people having the same aspiration and interest difference position.

This tune difference component at work, first gear 33 withFrictional disk 37 synchronizes togetherRotation,Frictional disk 37 drives under it The friction pulley 43 of side rotates, so thatIt is describedWorm screw 42 is rotated by turbine drives counter drive shaft 40, counter drive shaft 40 Transmission drive the 6th gear 41 rotate synchronously, and the 6th gear 41 then drive the 4th gear 38 being engaged with rotate, the 4th Shaft where the rotation of gear 38 has driven two the 5th gear 39 is rotated around main shaft 32, thus just with third gear 36 etc. Planetary gear train is formed, whole progress accessory drive is formed by third gear 36 and second gear 35, adjusts difference to realize Effect for preferably fixed first gear 33 and is allowed to that friction pulley 43 is integrally formed and enhanced with frictional disk 37) and frictional disk 37 Between contact friction force and avoid transmission clamping stagnation, accessory drive effect is better achieved, can be by cylindrical spring pocket in master To hold out against first gear 33 on transmission shaft 32, thus stronger reliable between frictional disk 37, further prevent frictional disk 37 with Friction pulley 43 skids, and main shaft 32 and frictional disk 37 are integrated, and first gear 33 is covered on frictional disk 37 by spline structure, First gear 33 and spring contact position are equipped with plane bearing, and spring is positioned by fixing sleeve), it can be effective using this kind of structure Prevent from skidding between friction pulley 43 and frictional disk 37, long-play avoids clamping stagnation) because under sudden surge or vibration Cylindrical spring itself has certain buffer capacity.The specific working principle of Tiao Cha mechanism in the present embodiment is as follows: passing through work The elastic force of cylindrical spring on frictional disk 37,43 points/line of frictional disk 37 and friction pulley contact, by knowing, as pressure N and friction system Mono- timing of number μ, when forced area is infinitely small, then frictional force is infinitely great, to guarantee that friction pulley 43 and frictional disk 37 can be effective Transmission and it is non-slip, and frictional disk 37 and friction pulley 43 select special substance and after specially treated, and long-term engaged transmission is not Deformation (will not increase contact surface because of deformation, to influence to reduce frictional force, frictional disk 37 and friction pulley 43 be made to there is the wind to skid Danger).Since input adjusts the revolving speed of poor gear assembly constant, i.e., angular velocity omega is constant, when friction pulley 43 is in the difference of frictional disk 37 When the radius position r, tangential velocity v=r ω is also different, i.e. 43 velocity of rotation of friction pulley is different, thus make the 6th gear 41, The revolving speed change of worm screw 42, the 4th gear 38.It is assumed that input first gear 33 rotates counterclockwise, and as r=0, v=0, friction pulley It does not rotate, the 4th gear 38 does not rotate i.e. auxiliary driving and do not work；As r < 0 (on the left of the center of circle), friction pulley is rotated counterclockwise, 4th gear 38 rotates counterclockwise, and r is remoter from the center of circle, and the rotation of the 4th gear 38 is faster, and total output is faster；(the center of circle as r > 0 Right side), friction pulley rotates clockwise, and the 4th gear 38 rotates clockwise, and r is remoter from the center of circle, and the rotation of the 4th gear 38 is faster, always It exports slower.

When adjusting difference, it is inserted into guide rod 44, with poor spanner rotary worm 42 is adjusted, changes friction pulley 43 in 37 lower contact of frictional disk Position, to change revolving speed.It rotates in an anti-clockwise direction, even if Fluid Volume, there is no variation, this hour counter will also obtain One very high displayed quantity.On the contrary, then obtain lower displayed quantity rotationally clockwise, the flowmeter that rotates a circle of worm screw 42 is aobvious The amount of showing will change.

In above-described embodiment, for measuring room, the first curve 1 passes through and rotor outer circle (18 outside cylinder of cylindrical core Face) sealing is formed, to guarantee the partition of inlet port, form pressure difference.Second curve 8 and the 4th curve 9 are transition arc curve, are protected It is steady as far as possible in this two sections of curves to have demonstrate,proved scraper plate, scraper plate acceleration when radially sliding is made for circular cylindrical cavity Spend it is as small as possible, and make third curve 4 as metering curve when scraper plate in this region, since gravity, centrifugal force and liquid push away Scraper plate is fitted in always on third curve 4 under the action of power, accurate measurement.It can be seen that surrounded using this four curves Cross section is in the special metering cavity of cam contour shape, advantageously allows rotor inside metering cavity in the percussion of fluid Under can preferably push fluid motion, measured, measuring chute be third curve 4 corresponding to rotor and metering chamber interior walls Between cavity, the graphite scraper plate of rotor assembly is preferably continuously and stably contacted with measuring room cavity inner wall, relative to such as It is measured for the cylindrical measuring room cavity or other shapes cavity of traditional cockscomb etc more accurate.

After rotor assembly is packed into measuring room cavity, since connecting rod 22 can be in cylindrical core 18 along cylindrical core 18 Radial slippage, therefore, in measuring room enter fluid media (medium) to be batched after, in fluid impact to the promotion of graphite scraper plate 23 Under effect, rotor assembly is started turning, and cooperates the unique cam profile of measuring room cavity of measuring room, with measuring room The curvilinear motion of cavity inner wall, correspondingly realizes radial slippage, so that keeping always with cavity wall of cavity wall during rotation Good contact, graphite is smooth and wearability is good, can guarantee that its permanently effective between measuring room cavity inner wall contacts, connecting rod 22 Cross connects graphite scraper plate 23 with being staggeredly arranged so that entire rotor component construction is compact and flexibility is good, it is often more important that The design of rotor thrust slot 26, increasing action is in the thrust of blade member, especially using the recessed of waist hole type as shown in drawings When slot designs, fluid thrust can be more fully utilized, preferably pastes the curve of graphite scraper plate 23 and measuring room cavity inner wall It is combined, guarantees measuring accuracy.

Explanation is explained in detail to the working principle combination respective drawings of the measuring room component of the present embodiment below:

One, Force Calculation

Because graphite scraper plate 23 and the finish of thrust slot 26 are very high, the single-sided friction resistance pair of scraper plate and slot can be ignored herein The influence of movement, for convenient for the link position relationship between statement response curve, the second curve 8 and the 4th curve 9 are divided respectively For the leading portion 2 of the second curve, the back segment 3 of the second curve, the back segment 6 of the leading portion 5 of the 4th curve, the 4th curve.

When the working condition shown in Figure 12, the stress Fa=Tacos θ a+Ga+Na=Tacos θ a+mg+m ω 2ra of scraper plate a

The stress Fc=Gc-Nc+Tccos θ c of scraper plate c (the thrust Tc for acting on scraper plate C is zero)

=mg-m ω 2r c+Tccos θ c

Along the resultant force Fac=Tacos θ a+Ga+Na+Gc-Nc+Tccos θ c of scraper plate ac

=Tacos θ a+mg+m ω 2ra+mg-m ω 2r c+Tccos θ c (ra > r c) > 0

Therefore the back segment 3 that scraper plate a pastes the second curve slides.

The stress Fd=Tdcos θ d+Nd=Tdcos θ d+m ω 2r d of scraper plate d

The stress Fb=Nb=m ω 2r b of scraper plate b

Along resultant force Fbd=Tdcos θ d+Nd-Nb=Tdcos θ d+m ω 2r d-m ω 2r b (rd > r b) > 0 of scraper plate bd

Therefore scraper plate d patch third curve 4 slides.

When the working condition shown in Figure 13, the stress Fa=Tacos θ a+Gacos β a+Na=Tacos θ a+mgcos of scraper plate a βa+mω2ra

The stress Fc=Gccos β c-Nc of scraper plate c (the thrust Tc for acting on scraper plate C is zero)

=mgcos β c-m ω 2r c

Along scraper plate ac resultant force Fac=Tacos θ a+Gacos β a+Na+Gccos β c-Nc

=Tacos θ a+mgcos β a+m ω 2ra+mg cos β c--m ω 2r c (ra > r c) > 0

Therefore scraper plate a patch third curve 4 slides.

The stress Fd=Gdcos θ d-Nd-Tdcos θ d=mgcos θ d+m ω 2r d-Tdcos θ d of scraper plate d

The stress Fb=Nb+Gbcos θ b+Tbcos θ b of scraper plate b

=m ω 2r b+mgcos θ b+Tbcos θ b

Along the resultant force Fbd=Gdcos θ d-Nd-Tdcos θ d+Nb+Gbcos θ b+Tbcos θ b=mgcos θ d-m ω of scraper plate bd 2r d-Tdcosθd+mω2r b+mgcosθb+Tbcosθb

As mgcos θ d+m ω 2r b+mgcos θ b+Tbcos θ b < m ω 2r d+Tdcos θ d

Scraper plate d is slided close to the leading portion 5 of the 4th curve.

As the rotation of rotor is as mgcos θ d+m ω 2r b+mgcos θ b+Tbcos θ b > m ω 2r d+Tdcos θ d

Scraper plate d gradually disengages the leading portion 5 of the 4th curve and b is then slided close to the leading portion 2 of the second curve.

When the working condition shown in Figure 14, the stress Fa=Tacos θ a-Gacos β a+Na=Tacos θ a- of scraper plate a mgcosβa+mω2ra

The stress Fc=Gccos β c+Nc of scraper plate c (the thrust Tc for acting on scraper plate C is zero)

=mgcos β c+m ω 2r c

Along the resultant force Fac=Tacos θ a-Gacos β a+Na-Gccos β c-Nc=Tacos θ a-mgcos β a+m ω of scraper plate ac 2ra-mgcos β c-m ω 2r c (ra > r c, Tacos θ a > mgcos β a+mgcos β c) > 0

Therefore scraper plate a patch third curve 4 slides.

The stress Fd=Tdcos θ d-Nd+Gdcos β d=Tdcos θ d-m ω 2r d+mgcos β d of scraper plate d

The stress Fb=Nb+Tbcos θ b+Gbcos β b=m ω 2r b+Tbcos θ b+mgcos β b of scraper plate b

Along the resultant force Fbd=Tdcos θ d-Nd+Gdcos β d-Nb-Tbcos θ b-Gbcos β b=Tdcos θ d-m ω of scraper plate bd 2r d+mgcos β d+m ω 2r b+Tbcos θ b+mgcos β b (rd < r b) > 0

Therefore scraper plate b patch third curve 4 slides.

When rotor assembly goes to Figure 15 as in the operating condition of Figure 13, details are not described herein again.

In conclusion the utility model specially devises the measuring room and rotor assembly having their own characteristics each, and by two kinds of components Preferably combine together, collectively constituted core component-measuring room component of graphite blade flowmeter, rotor assembly from Mental and physical efforts, the thrust self gravity of media flow are contacted with the cam contour shape Curve Matching of measuring room cavity, so that blade member It is naturally contacted with measuring room cavity inner wall under multiple power force actions, relies on cam relative to traditional cockscomb For shape guarantees its motion profile as pattern, the movement between blade member and measuring room in the present embodiment is to rely on Fluid flow when thrust, blade member gravity and rotation when centrifugal force caused by resultant force come guarantee graphite scraper plate be close to Measuring room cavity inner wall is mobile, takes advantage of a situation and moves from being largely synthesis stress when complying with flow meters work, not only It is only mechanically to limit its motion profile by measuring room cavity geometry in particular, in addition, the measuring room of the present embodiment Component is different from the measuring room component measuring principle of general blade flowmeter, and the cross-shaped arrangement of this measuring room component is scraped What is formed between plate component, with metering chamber interior walls is four regions, wherein the fan-shaped region being only located on third curve is only meter Storehouse is measured, when rotated rather than general blade flowmeter, with four volumes measuring chute the same always, due to cam contour The special metering cavity body structure form of shape, is aided with adaptable rotor assembly, graphite scraper plate is passing through under above-mentioned force action The measuring room that automatically can towards one Slideslip of third curve and be thus close to where third curve when third curve (at measuring chute) Cavity inner wall has fully ensured that the airtightness at measuring chute, to ensure that measuring accuracy, also, due under force action Graphite scraper plate can be naturally towards third curved slide motion, therefore, and even the corresponding contact side of graphite scraper plate has certain The abrasion of amount will not influence graphite scraper plate at measuring chute with the contact tightness of third curve, thus just will not influence To measuring accuracy.

As another embodiment, on that basi of the above embodiments, by the design parameter of the second curve 8 and the 4th curve 9 into The further optimization design of row, obtains the expression formula of the curve ρ 1 of the second curve 8 and the 4th curve 9 are as follows:

In the above parameter, L is the half of scraper thickness, and θ 1 is the second curve 8 or point and the first song on the 4th curve 9 Angle between the center of circle of line 1 between line and X-axis, Y-axis corresponding to the X-axis are pair between second, the 4th liang of curve Claim axis 7.It is directed to the expression formula of above-mentioned curve ρ 1, specific derivation process is as follows:

The discharge capacity account method of blade flowmeter is introduced first, and the R in above-described embodiment and r are and flowmeter itself The measurement unit (discharge capacity) of setting is directly related, and specific value is determined by flowmeter discharge capacity itself, also, wherein r is equal to The radius value of cylindrical core 18 used by rotor assembly, therefore, r value are needed according to the radius of used cylindrical core come really It is fixed.The discharge capacity account schematic diagram of measuring room is as shown in figure 16, wherein

Scraper thickness: B

Measuring room height: H

Discharge capacity: q1

It is not difficult to find out that the every of measuring room turns discharge capacity according to the principle of blade flowmeter are as follows:

Q1=(π × (R2-r2) -4S1+4 (R-r) × B) × H (1)

In formula, S1 is the area that scraper plate cross-sectional area accounts in circular ring shape chamber volume cross-sectional area, can from attached drawing S1 is the bow-shaped area that a rectangular area adds top out, subtracts the bow-shaped area of lower part, obtains following formula after collated (2):

It brings formula (2) into formula (1) and obtains q1:

Therefore, after setting the discharge capacity q1 of flowmeter itself, due to the cylindrical core of r value and used rotor assembly Partial diameter is related, therefore the value of R can be calculated according to discharge capacity q1 and r.

Then, the present embodiment continues to provide the second curve 8 and the calculating process of the 4th curve 9 is as follows:

Rotor uniform rotation, as shown in figure 17, at the first curve 1 and third curve 4, rotor scraper plate 10 (that is, scraper plate Component) do not radially slide that (its blade/scraper plate can be slided in the radial direction inside measuring room when rotated because of rotor assembly Dynamic, to continuously contact with metering chamber interior walls holding, and two curves are therefore sliding is not present in standard circular arc herein), in third 4 upper scraping plate of curve and inner wall are face contacts, and on the first curve 1, and scraper plate and inner wall are that line is contacted and (shown a little after taking section A, B), and on the second curve 8 and the 4th curve 9, scraper plate then radially slides that (contact point of upper scraping plate and inner wall is begun in section It is eventually M, N and M1, N1).

When at this time scraper plate being required to radially slide, acceleration as far as possible it is small in the hope of rotate it is more steady, to guarantee The noise of flowmeter, stability, precision are more preferable, may know that the second curve 8 and the 4th curve 9 respectively just by the motion process of scraper plate It is the moving contact track of scraper plate endpoint M and N, formula equation is carried out to the second curve 8 and the 4th curve 9 and is carried out gradually excellent Change, this two easement curves need to meet the following conditions:

Condition one: scraper plate overall length is fixed length.

The back segment 6 of the leading portion 2 of two: the first curve 1 of condition and the second curve, the 4th curve；Third curve 4 and the second curve Back segment 3 and the 4th curve leading portion 5；The leading portion 2 of second curve and the back segment 3 of second segment curve, 5 He of leading portion of the 4th curve 6 transition of back segment of 4th curve is smooth (tangent), to eliminate scraper plate to the impact force of inner wall.

Condition three: when scraper plate radially slides in the rotor, acceleration is small as far as possible, keeps its rotation more steady.

As shown in figure 18, first assume that scraper plate is that (4 radius R of third curve, 1 radius r of the first curve, second is bent for a straight line The leading portion 2 of line, the back segment 3 of the second curve are the easement curve that angle is 2 α).

(1) ρ (θ)+ρ (- θ)=R+r (constant), (meeting condition one)

(2) ρ (α)=R, ρ (- α)=r (meet condition two)

(3) acceleration is as small as possible when requiring scraper plate to do radial motion, that is, requiresIt is numerically as small as possible (full Sufficient condition three)

Angular speedInherently

It is required thatNumerical value is small as far as possible, is equivalent to" (θ) numerically as small as possible.

According to condition one: ρ (θ)+ρ (- θ)=R+r (constant), the amount that ρ is changed when polar angle changes to θ by 0, with by 0 to- The amount that ρ is changed when θ should cancel out each other.If this variable quantity presses the sinusoidal variation such as sin θ or sin2 θ, just there are this feelings Condition enables variable quantity ρ (θ)-ρ (0)=f (θ), and f (θ) is equal with f (- θ) numerical value, contrary to be

F (θ)=- f (- θ)

F (θ) is odd function

ρ=ρ (θ)=f (0)+f (θ)=a+f (θ) (f (0)=a is a constant)

If choosing f (θ)=b θ, that is, ρ=a+b θ, the condition a of satisfaction still

ρ ' (θ)=b, in b ≠ 0, ρ ' (θ) ≠ 0 is unsatisfactory for condition c

Therefore it can try to take ρ=a+b θ+c θ³

According to condition one, two:

a+bα+cα³=R

a-bα-cα³=r

b+3cα²=0

Therefore,

Temporarily to take in view of the leakproofness at metering third curve 4

2, scraper plate is actually not straight line but width is 2L, as shown in figure 19:

M1 and M are linked up, and when OM1 goes to the angle that OM is passed through, which can regard as

Then:

ρ=ρ 1

The track i.e. side of the second curve 8 of M1 (ρ 1, θ 1) then can be obtained in the equation of locus (formula one) of band access point M (ρ, θ) Journey, but be only limitted in sectionAbove, in sectionIt is upper existing Therefore M (ρ, θ) is located on orthodrome 4, and ρ 1=R obtains the expression formula of the second curve 8 are as follows:

Therefore the expression formula of the 4th curve 9 has also been obtained.

The difference (ρ 1 is actually reduced into ρ) of ρ 1 and ρ is not considered in above-mentioned operation, and replaces arc length to scrape board width 2L, Because their difference is very small, (formula two) is enough accurate.

It is derived according to above-mentioned a series of curve as can be seen that the measuring room cavity use based on cam contour shape structure should After specific parameter of curve manufacture, it can to cooperate more preferably between measuring room itself and rotor, excellent combination property, adaptability It by force, can larger promotion measuring accuracy.

As embodiment, it is preferable that the import 11 and outlet 12 are also symmetrical about the axis of symmetry 7, the import 11 by arc-shaped first diversion trench 13 and measuring room cavity connection, and first diversion trench 13 is 1 institute of the first curve An interlayer space in metering room housing at position, so that external fluid is successfully introduced into measuring room cavity Interior, the fluid of entrance is more stable, and effective guarantee inlet and outlet are effectively separated, and rotor scraper plate 10 is at third curve 4 When can preferably fit together (close to 1 side of the first curve scraper plate stress it is smaller, hardly by External force interference).

Further, for the second curve 8, leading portion is connected with 1 one end of the first curve, back segment and 4 one end of third curve It is connected；For the 4th curve 9, leading portion is connected with the other end of third curve 4, and back segment is connected with the other end of the first curve 1； Intersectional region of the leading portion region of second curve 8 between first diversion trench 13 and measuring room cavity, thereafter Section is located on the radially projecting spaced several layers water conservancy diversion gusset 14 in metering chamber interior walls, and the water conservancy diversion gusset 14 is in circle Arc plate and its circular arc concave surface are surface where back segment；It is second that arc-shaped groove is formed by between adjacent two water conservancy diversion gusset 14 Diversion trench 15, second diversion trench 15 smoothly connect integrally with the first diversion trench 13, and intersection is institute between two diversion trenches State the intersectional region between the first diversion trench 13 and measuring room cavity.Second diversion trench 15 can guarantee that liquid does not act on power In on the curved surface of scraper plate, influencing scraper plate and third curve 4 fits together, it is gradually increased by the second diversion trench 15 to scraper plate Thrust.

Further, as shown in Fig. 4-5, the leading portion position of the 4th curve also is provided with several water conservancy diversion gussets 14, water conservancy diversion this at symmetrical about the axis of symmetry 7 between two groups of water conservancy diversion gussets 14 on the second curve 8 and the 4th curve 9 The arc-shaped groove formed between plate 14 is used as aerial drainage gas pressure relief slot 20, and gradually pressure release reduces the thrust for acting on scraper plate, just It is retracted into cylindrical core 18 in scraper plate.The back segment of 4th curve 9 is in the metering room housing of the part institute face of the first curve 1 Equipped with the separation muscle 16 for separating the import 11 and outlet 12, the separation muscle 16 is in " people " font, and tip portion will The import 11 and outlet 12 separate, and two extend one and the interlayer in curved two branch towards measuring room inside Metering chamber interior walls where space are linked together, another article as erosion control block 19 towards the 4th curve 9 leading portion bending extend and Do not protrude into measuring room cavity so that between two branches one buffer fluid of shape buffer area 17, can be highly desirable Impact of the outlet liquid to rotor assembly is prevented, is shaken back and forth to avoid rotor assembly.

Further, on the basis of above-mentioned all embodiments, the connection between the graphite scraper plate 23 and connecting rod 22 is solid Determine mode are as follows: connecting rod 22 is inserted through thrust slot 26 along the width direction of graphite scraper plate 23, and graphite scraper plate 23 is by shaft 21 28 end face of positioning ring being arranged on side and connecting rod 22 connects, and is also fixedly inserted with locking on the connecting rod 22 in the thrust slot 26 Pin 24 is also cased with the pin that is locked on the connecting rod 22 between the inner wall of the locking pin 24 and thrust slot 26 by 28 side of positioning ring 24 and the holddown spring 25 that presses of 26 inner wall of thrust slot so that graphite scraper plate 23 is fixed on 22 end of connecting rod, locking pin 24 with Scraper plate is mounted on connecting rod 22 by spring cooperation with holding out against, and wants firm for general direct interference fit is fixed, this It is axially to be pushed up because the material characteristic of graphite itself is not suitable for metal material like that using interference fit using this locking spring Graphite scraper plate 23 is fixed on connecting rod 22 by tight mode efficiently avoids this problem, and convenient for assembly and disassembly maintenance.

Further, a loop stone is equipped in the cylindrical core 18 at the both ends of each perforation of the shaft 21 Black bearing 27, the loop graphite bearing 27 are screwed in cylindrical core 18 and are coaxially disposed with perforation, loop graphite bearing 27 For connecting rod 22 along axially free sliding, additional loop graphite bearing 27 is arranged can reduce for cylindrical core 18 inner hole Material requires and requirement on machining accuracy, when production, need to only consider that the material of loop graphite bearing 27 and machining accuracy are i.e. certifiable The flexibility and reliability that slides axially of connecting rod 22, to guarantee the working performance of blade member, and most important purpose is to borrow stone The lubrication and leakproofness of black bearing, so that the interspersed cooperation between connecting rod 22 and cylindrical core 18 will not be because (medium is in stone for leakage Flowing is permeated in the area of space encircled a city between black scraper plate 23 and metering chamber interior walls) and influence measuring accuracy.

Further, locking nut and adjusting nut are screwed with by the part of the graphite scraper plate 23 in at least one end of connecting rod 22 29, wherein one end of the adjusting nut connects away from a side end face of graphite scraper plate 23 with the positioning ring 28 and scrapes to graphite The generation of plate 23 squeezes and realizes and adjust graphite scraper plate 23 in the function of 22 end installation site of connecting rod, the locking nut and adjusting 29 close proximity of nut is to realize being locked to adjusting nut 29 and graphite scraper plate 23.The structure design primarily to It is needing to be the adjusting for carrying out entire scraper component length direction, is adjusting graphite scraper component by adjusting this to nut Length achievees the purpose that the gap for adjusting graphite scraper plate and shell inner cavity, to guarantee measuring accuracy.

Further, the wheel rim of the friction pulley 43 is in semicircle shape and its circular arc vertex can be with 37 bottom face phase of frictional disk It connects, increases friction when contact, to guarantee that friction pulley 43 and frictional disk 37 can be effectively driven and non-slip, the worm screw 42 free end, which is equipped with, turns portion 421 for what spanner turned, so as to rotary worm 42, adjusts 43 position of friction pulley.

Further, the measuring room component is at least provided with two, and all measuring room components are coaxially arranged in series, and institute Some rotor assembly are coaxially attached in same shaft, so that the gauge flexibility and changeability of flowmeter, passes through multiple meters Amount room is used in series, and expands measures range, easy to produce and use.It is staggered between adjacent two rotor assembly 3 degree, i.e., it is adjacent Formed angle is 3 degree between the neighbouring graphite scraper plate 23 of upper and lower two rotor assembly, to guarantee graphite scraper plate 23 alone Rotor slot in sliding without generate interference, guarantee the feasibility being used in series and reliability.

The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.

Claims

1. a kind of graphite blade flowmeter including measuring room component, adjusts poor component and shows the gauge outfit of metering reading, measuring room portion Part is by adjusting the input shaft of poor component and gauge outfit to be sequentially connected；

Wherein, the measuring room component includes measuring room and is mounted on the indoor rotor assembly of metering；

Measuring room includes measuring room cavity and the inlet and outlet that is respectively communicated with measuring room cavity, the inlet and outlet setting On the side wall of measuring room cavity；It is characterized by: measuring room cavity cross section is in cam contour shape, the cam contour Surrounded by 4 curves, including the first curve that radius is r, radius be R third curve and R > r, the first curve and third curve The center of circle of face setting and the first curve is located in the shaft of measuring room inner rotator, divides between the first curve and third curve Not She You shape is identical and the second curve and the 4th curve of the arrangement that is mutually symmetrical so that four curves surround the cam wheel Wide curve；

Rotor assembly includes the cylindrical core and a pair of of blade member of cylindrical shape, this is in set cross-shapedly to blade member In in cylindrical core, and each piece of blade member can radially slide in cylindrical core along cylindrical core；

Cylindrical core, including the through-hole being arranged along its central axes, interference fit has shaft in through-hole, and shaft is equipped with two groups each other Vertical and disjoint perforation, cylindrical core respectively offer a rectangle at two mutually perpendicular both ends diametrically Notch, the length direction two sides of the notch extend through the upper and lower end face of cylindrical core；

Blade member, including quantity and the consistent connecting rod arranged in parallel of every group of the number of holes, connecting rod two end is separately connected There is the graphite scraper plate of one piece of rectangular plate-like, the graphite scraper plate can be free to slide in the notch；All graphite scraper plates face The side of fluid impact is equipped with the thrust slot of recess, and face phase is arranged in the thrust slot on two graphite scraper plates of every piece of blade member Instead；

All connecting rods of every piece of blade member axially displaceably correspond in one group of perforation being matched therewith, so that Cylindrical core is interior and every piece of blade member can be in cylindrical core along cylinder in being set to cross-shapedly for two pairs of blade members Core radially slides；

The poor component of the tune includes main shaft, on main shaft it is axially mounted on have connect with the rotating shaft transmission of rotor assembly First gear；Further include and the second gear of the input shaft of gauge outfit transmission connection, a pair of spaced apart third gear up and down And the frictional disk being integrally connected with first gear positioned at main shaft bottom end；Wherein, superposed third gear and master Transmission shaft is fixedly connected, and the third gear positioned at lower part coaxially connects and is fixed as one with the second gear, and the second tooth Taking turns the entirety formed with the third gear for being located at lower part can be freely rotated around main shaft；Main transmission between two third gears It is rotationally equipped with the 4th gear on axis, is coaxially equipped with one respectively in upper and lower end faces of the 4th gear by its edge 5th gear, two the 5th gears, which are mounted on, to be extended vertically through in the both ends of the shaft on the 4th gear, and two the 5th gears be all Two thirds gear arranged up and down corresponds engagement so that main drive shaft when rotating can by the third gear on top with The third gear engaged transmission of the 5th gear and lower part for engaging to drive lower part between 5th gear on top；

4th gear is engaged with the 6th gear of the counter drive shaft upper end for being parallel to main shaft setting, counter drive shaft bottom end Turbine connect with worm-drive, worm screw is equipped with thread segment, and being combined with wheel rim on thread segment can be with the frictional disk bottom face The friction pulley to connect, friction pulley are embedded with worm screw when preventing friction pulley from rotating that one is tightly placed on thread segment relative to friction pulley The friction sleeve of skidding is additionally provided with a dismountable guide rod on the direction parallel with worm screw, is equipped on bracket and friction pulley One through-hole for guide rod insertion turns worm screw and makes hole on friction pulley and bracket can be with co-axially align to be rapidly inserted into Guide rod.

2. graphite blade flowmeter according to claim 1, it is characterised in that: the curve of second curve and the 4th curve The expression formula of ρ 1 are as follows:

ρ 1=R,

In the above parameter, L is the half of scraper thickness, and θ 1 is the second curve or point and the first curve center of circle on the 4th curve Between angle between line and X-axis, Y-axis corresponding to the X-axis is the axis of symmetry between second, the 4th liang of curve.

3. graphite blade flowmeter according to claim 1 or claim 2, it is characterised in that: the import is arc-shaped by one First diversion trench and measuring room cavity connection, first diversion trench are in the metering room housing of the first curve position One interlayer space.

4. graphite blade flowmeter according to claim 3, it is characterised in that: second curve and the 4th curve include Leading portion and back segment, wherein for the second curve, leading portion is connected with first curve one end, and back segment is connected with third curve one end； For the 4th curve, leading portion is connected with the other end of third curve, and back segment is connected with the other end of the first curve；Described second Intersectional region of the leading portion region of curve between first diversion trench and measuring room cavity, section is located at radially thereafter It protrudes from the spaced several layers water conservancy diversion gusset in metering chamber interior walls, which is in circular arc plate and its circular arc is recessed Face is surface where back segment；It is the second diversion trench that arc-shaped groove is formed by between adjacent two water conservancy diversion gusset, and described second leads Chute smoothly connects integrally with the first diversion trench, and intersection is first diversion trench and measuring room cavity between two diversion trenches Between intersectional region.

5. graphite blade flowmeter according to claim 4, it is characterised in that: the leading portion position of the 4th curve Several water conservancy diversion gussets also are provided with, about the axis of symmetry pair between two groups of water conservancy diversion gussets on the second curve and the 4th curve Claim, the back segment of the 4th curve is equipped with by the metering room housing of the part institute face of the first curve for separating the import and going out Mouthful separation muscle, for the separations muscle in " people " font, tip portion separates the inlet and outlet, and two towards metering Extend in curved two branch one of indoor is linked together with the metering chamber interior walls where the interlayer space, another court The leading portion bending of 4th curve extends and does not protrude into measuring room cavity, so that one buffer fluid of shape between two branches Buffer area.

6. according to claim 1 or the 5 graphite blade flowmeters, it is characterised in that: between the graphite scraper plate and connecting rod It is connected and fixed mode are as follows: connecting rod is inserted through thrust slot along the width direction of graphite scraper plate, and graphite scraper plate leans on the side of shaft Connect with the positioning ring end face being arranged on connecting rod, locking pin is also fixedly inserted on the connecting rod in the thrust slot, in the lock Tight pin and thrust slot are also cased with the pressure that be locked pin and thrust slot inner wall press on the connecting rod between the inner wall of positioning ring side Tight spring, so that graphite scraper plate is fixed on interlinking lever end.

7. graphite blade flowmeter according to claim 6, it is characterised in that: at the both ends of each perforation of the shaft Cylindrical core in be equipped with a sliding sleeve, the sliding sleeve is screwed in cylindrical core and is coaxially disposed with perforation, the inner hole of sliding sleeve For connecting rod along axially free sliding.

8. graphite blade flowmeter according to claim 7, it is characterised in that: lean on the graphite scraper plate in connecting rod at least one end Part be screwed with locking nut and adjusting nut, wherein one end of the adjusting nut and the positioning ring are away from graphite scraper plate One side end face, which connects and generates to graphite scraper plate, to be squeezed and realizes the function of adjusting graphite scraper plate in interlinking lever end installation site, institute It states locking nut and is locked with realizing to adjusting nut and graphite scraper plate with adjusting nut close proximity.

9. graphite blade flowmeter according to claim 1 or 8, it is characterised in that: the wheel rim of the friction pulley is in semicircle shape And its circular arc vertex can connect with frictional disk bottom face, the free end of the worm screw, which is equipped with, turns portion for what spanner turned.

10. graphite blade flowmeter according to claim 1 or 8, which is characterized in that the measuring room component is at least provided with two A, all measuring room components are coaxially arranged in series, and all rotor assembly are coaxially attached in same shaft, adjacent 3 degree of rotational offset between two rotor assembly.