CN103742705B - A kind of drive mechanism for mechanical type timing valve - Google Patents
A kind of drive mechanism for mechanical type timing valve Download PDFInfo
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- CN103742705B CN103742705B CN201310472181.3A CN201310472181A CN103742705B CN 103742705 B CN103742705 B CN 103742705B CN 201310472181 A CN201310472181 A CN 201310472181A CN 103742705 B CN103742705 B CN 103742705B
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- sector gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/48—Mechanical actuating means actuated by mechanical timing-device, e.g. with dash-pot
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to valve gate technology, disclose a kind of drive mechanism for mechanical type timing valve, open or close the rotating shaft of valve including one by forward and reverse campaign, for the sector gear of rotating shaft Yu the limited linkage of timer spindle.Described sector gear has a freely rotatable angle relative to rotating shaft, effective angle of engagement of described sector gear is not less than the phase angle of the open and close valve of described rotating shaft, and no more than sector gear is relative to the freely rotatable angle of rotating shaft, sector gear resetting-mechanism promotes the sector gear of dislocation to be close to connected gear.The opening action of valve is associated with the main shaft of intervalometer by the present invention by sector gear, not only increases the convenience of operation, also provides absolute guarantee for the safety during using.Further through the setting at freely rotatable angle, solving the problem how keeping valve full open position in timing course, it is ensured that in timing course, the open mode of valve is not affected by time movement.
Description
Technical field
The invention belongs to valve technology field, relate to how to realize the technology that valve timing is closed, be mainly used in the valve of gas pipeline.
Background technology
Gaseous fuel popularizing in domestic. applications, the life for people brings great convenience, but some problems the most progressively display.The problem i.e. safety problem that people are paid attention to the most, for many years, people focus in fuel leakage take precautions against, but it is anti-existing to pay close attention to the accident occurred for many years, mostly forgets that closedown causes because of valve.For this problem, the valve with timing function occurs, but uses electronic timer more, but because of the price reason such as partially, not being in, it is universal to use.And its disadvantage is, when battery failure, timing function lost efficacy therewith.For easily forgetting the user of closedown valve, it is desirable to it changes battery on time, it is clear that be not easily achieved.As changed battery not in time, Timed valve wouldn't perform practically no function.
Additionally, reliability of electronic components is low in electronic timer, being easily damaged lost efficacy or be interfered makes mistakes, and electronic component is water funk.Therefore electronic type Timed valve reliability is the lowest.
Mechanical timer, mainly it is made up of timing mechanism and escapement speed-adjusting mechanism two parts, timing mechanism is turned round as motive power drive shaft by clockwork spring (calling timing clockwork spring in the following text), actuator action at the end of timing is triggered as trigger mechanism by cam, timer cam is the most individually assemblied on camshaft, camshaft and main shaft are by gear drive, and for the main shaft timing range intervalometer less than a week, timer cam can also be fit directly on main shaft.
Regularly handle is typically assemblied on main shaft, also has part intervalometer separately to set a timing axle, regularly assembling timing handle on axle, and regularly axle and main shaft pass through gear drive.
Escapement speed-adjusting mechanism is identical with the structural principle of clock and watch (to be seen " mechanical timing instrument " that Jing Yixi timing teaching and research room of University Of Tianjin writes, Tianjin science tech publishing house, Tianjin, 1980." the watch structure principle " that Chen Changshan writes, Shanghai science tech publishing house, Shanghai, 1980), produced the swing of fixed frequency by balance spring mechanism, by escapement lever, swing is transferred to escape wheel, two of escapement lever end forks watt or cylindrical pins alternating action (escapement often swings once to control the rotating speed of escape wheel, escape wheel rotates the angle of a tooth), the rotation of escape wheel is passed through gear set drive by the terminal flywheel of guiding mechanism.Terminal flywheel is coordinated by ratchet mechanism (internal messing formula ratchet mechanism) with main shaft, links (ratchet and ratchet engagement) both during main shaft gyration, and escape wheel is controlled in the final body control now to main shaft gyration rotating speed by escapement lever.Storing force direction by handle to clockwork spring and rotate main shaft, main shaft band moving cam leaves phase-triggered.Decontroling handle, timing starts.Clockwork spring drive shaft is slowly turned round under escapement speed-adjusting mechanism restriction effect, until cam revert to phase-triggered, timing terminates, and actuator is by cam trigger action.
Timer cam common are two kinds, and a kind of is the common disc cams of circumferential band lobe, and a kind of is the disc structure of band recess on circumference.The first is by protruding pushing executing mechanism execution, and cam is directly as the power source of execution action, and the motive force being generally used for actuator needs is less, and the simple occasion of actuator action, as triggered touch switch.The second is to release the restriction to actuator by recess, by actuator execution voluntarily, it is typically used for performing mechanism to complete to perform the occasion that required power is relatively big or execution action is more complicated, as the cam of the timing mechanism of alarm clock is the disc structure of band recess on circumference, the effect of recess is that releasing the swing to alarm clock percussion hammer limits.
Currently there are the valve using mechanical timer on gas pipeline, but in valve opening action mechanism, design unreasonable, typically valve opening door is separated with when setting, two handles are set when being respectively used to open valve and set, this structure is not only brought not only to user operation, but also inevitably, some user can be when using valve, only open valve, and when not setting, the timing function leading Timed valve performs practically no function, do not have and take precautions against dangerous effect.
Summary of the invention
Present invention aim at, based on above-mentioned prior art, propose a kind of drive mechanism action opening valve associated with the action setting timing, it is achieved the effect of enforced opening timing when opening valve.
The technical scheme is that a kind of drive mechanism for mechanical type timing valve, it is characterised in that include that one opens or closes the rotating shaft of valve by forward and reverse campaign, for the sector gear of rotating shaft Yu the limited linkage of timer spindle.Described sector gear has a freely rotatable angle relative to rotating shaft, effective angle of engagement (sector gear engages, with higher level's gear, the angle being initially rotated to be turned over from opposite side dislocation end from side) of described sector gear is not less than the phase angle (rotating shaft is opened from valve and turned to the angle that valve pass is turned over) of the open and close valve of described rotating shaft, and no more than sector gear is relative to the freely rotatable angle of rotating shaft.Sector gear resetting-mechanism promotes the sector gear of dislocation to be close to connected gear (the first gear being subsequently noted).
Adjusting the phase relation of sector gear and rotating shaft, make when sector gear is dislocated in forward direction, valve is in open mode, and sector gear relative to the freely rotatable angle of rotating shaft in its reverse directions.
The opening action of valve is associated with the main shaft of intervalometer by scheme of the present invention by sector gear, the timed activity reversing timer spindle upper handle indirectly open valve.On the one hand, by the setting time with open two actions of valve and unite two into one, substantially increase the convenience of operation.On the other hand, it is not necessary to be provided for opening the handle of valve specially, be conducive to reducing product size.The third aspect, two the rigid combinations of action of valve opening door and timing, force user to must be turned on the timing function of valve when opening valve, provide absolute guarantee for the safety during using.Further through the design at freely rotatable angle, solving the technical problem how keeping valve full open position in timing course, it is ensured that in timing course, the open mode of valve is not inverted by timer spindle to be affected
In technical solution of the present invention, what the pivotal role of sector gear was between the switch of limited linkage, i.e. valve and timer spindle associates only generation in certain angle range that timer spindle rotates.So can solve when the switch of valve associates with timer spindle, valve switch hard-over limits the maximum timing corner problem of timer spindle, and by optimizing design gear ratio, the opening operation of valve can be made, complete in the least angle range in timer spindle timing process.When timing range exceedes this least angle range, valve i.e. can fully open and (such as, set main shaft rotation and turn around as timing 1 hour, and set sector gear be engaged to from side opposite side dislocation, main axis angle is 36 degree, then timing is more than 6 points, can fully open valve).
And sector gear is then relative to the freely rotatable angle between rotating shaft, effect, after making timing start, the reversion of timer spindle does not affect the full opening of state of valve.Make valve before timing terminates, full open position can be kept all the time.
Described sector gear can be assemblied in described rotating shaft；Can also be assemblied in other and install on axle, other is installed axle and is connected by drive mechanisms such as gears with described rotating shaft.
Realize described sector gear, relative to rotating shaft, there is a freely rotatable angle, only need to there is relative freely rotatable angle between any two drive disk assemblies being connected between sector gear with rotating shaft.
Rotate relatively freely angle between two connected components to be realized by a variety of assembling structures.Generally can divide two classes, the first kind is aimed at the fit structure of axle and hole, such as the arch shaft shoulder and coordinates concentric arcuate axis hole, and the arc chord angle in hole is more than the arc chord angle of axle.For example, described rotating shaft upper end is the arch shaft shoulder, and the center of circle of described sector gear sets matched arch axis hole, and the arc chord angle of arch axis hole is more than the arc chord angle of the arch shaft shoulder.Equations of The Second Kind is additonal limit structure in revolute pair, and in this class position limiting structure, most typical structure is projection and the coordinating of chute.Such as, described sector gear is sleeved in described rotating shaft by axis hole loose fit, in described rotating shaft and sector gear, is respectively provided with the position limiting structure cooperated simultaneously.Specifically, sector gear by peg-in-hole assembly thereon in rotating shaft, the installation axis hole of sector gear is slidably matched with rotating shaft surface, it is provided with circumferentially extending groove along installing axis hole edge, rotating shaft is provided with the projection with groove fit, groove circumferential width is more than projection circumferential width, and projection contacts turned over angle with the groove other end from turning to groove one end in groove, is i.e. the sector gear freely rotatable angle relative to rotating shaft.When sector gear rotates in a certain direction and offsets with projection side to upper recess thereof groove end face, sector gear and axle start between turning to produce torque transmission.Deforming as one, described projection can be by being that the end that a lateral pin through rotating shaft core stretches out outside rotating shaft is constituted.This structure is relatively easy to machine.Projection and groove are arranged in turn also may be used, i.e. projection arranges the installation axis hole edge of sector gear, protrudes to axle center, and groove is formed in rotating shaft, recessed to axle center.No matter sum it up, use which kind of assembling structure to realize depositing between two connected components rotating relatively freely angle, all needing to meet following condition: one, connecting and composing revolute pair between the two, its two, both limited angle in relative rotation.
Attachment structure between timer spindle and sector gear can have multiple concrete form, only need to realize linking with sector gear.Simplest a kind of structure is directly by gear mechanism transmission, such as: on described timer spindle, assembling is for opening the first gear of valve, and the first gear engages with described sector gear.Certainly, between the first gear and sector gear, it is also possible to carrier gear is set with the gear ratio between tune main shaft to sector gear and moment of torsion.
The effect of described sector gear resetting-mechanism is when sector gear is after gear (above-mentioned first gear or the carrier gear being attached thereto) a certain lateral dislocation being attached thereto, and when needs reset, promotes sector gear to be close to coupled gear and again engages.Purpose is to make the drive mechanism disconnecting transmission proper time again link needs when.Based on this purpose, it is contemplated that, described resetting-mechanism should include two identical driver parts, or only include a driver part, but including two driving parts, to be each responsible for the promotion when two dislocations of coupled gear of described sector gear, or parts, but there is the function of bi-directional drive.Described driver part can be spring, shell fragment or other any parts that can produce pushing tow, tractive or twisting action or mechanism.
According to the mechanism having an effect, described sector gear resetting-mechanism can be divided into two kinds: a kind of is the mechanism the most immediately having an effect, and is such as triggered the mechanism of its action by the gear revolution being attached thereto.Relatively wanting complexity, trigger unit to be included and the execution unit of promotion sector gear revolution in this mechanism structure, described trigger unit can be mechanical part, it is also possible to be a kind of electronic component with detection function.What certainly complicated structure increased is not only material cost, processing cost, also makes troubles to dismounting, so unless in the most high-grade equipment, general it is not recommended that use this resetting-mechanism.Another kind is the mechanism of continuous action, and the elastomeric element of elastic deformation such as can occur, when described sector gear certain side will before certain corner in, described sector gear starts to act on and is allowed to elastic deformation on elastomeric element.From the beginning of described sector gear touches described elastomeric element, during turning round to described sector gear and depart from described elastomeric element, described sector gear is persistently had an effect by described elastomeric element.Include during this sector gear and elastomeric element dislocate to sector gear after connecing during, after the dislocation of described sector gear before the gear that is attached thereto be rotated further period, depart from elastomeric element effect to described sector gear after the gear revolution that is attached thereto before period.Continuous action formula revolution driver part is relatively easy, easy for installation, only elastomeric element one end or certain part need to be assemblied in suitable position.But the gear being attached thereto after described sector gear is dislocated is rotated further period, it will have the noise that gear mutually clashes into.Various springs, all can apply in the present invention as sector gear resetting-mechanism such as extension spring, spring leaf, torsion spring etc..Such as, described sector gear resetting-mechanism includes a torsion spring, and one end is hooked on the afterbody of sector gear, and the housing of the other end and Timed valve is fixed.The most such as, described sector gear resetting-mechanism is two shell fragments of corresponding described sector gear dual-side respectively.
When above-mentioned drive mechanism is applied to mechanical type timing valve, need to arrange pass valve system for valve, such as, rotating shaft is provided for the pass valve clockwork spring of drive shaft reversion, the force direction that unloads closing valve clockwork spring is the direction of rotation (rotating shaft then stores power to clockwork spring when opening valve) that valve is closed in rotating shaft
Using clockwork as the power source of closedown valve, compared with existing machinery formula Timed valve, structure is compacter, is conducive to reducing product size.
Scheme of the present invention goes for valve rod rotary type valve, such as ball valve, stop valve etc., it is also possible to be applicable to the valve that valve rod is portable, such as diaphragm valve.
When for ball valve, described rotating shaft can be valve rod itself, it is also possible to the linkage assembling of valve rod coaxial synchronous, can also be connected by gear drive with valve rod, if rotating shaft is valve rod itself, or be assembled together with the linkage of valve rod coaxial synchronous, then the phase angle of its controlled valve is 90 degree.
In the present invention, the effect closing valve clockwork spring is then to close valve valve.Therefore, when the valve rod itself that rotating shaft is not ball valve, as a kind of equivalent substitution mode of the present invention, described pass valve clockwork spring can be assemblied on valve rod.
Further, it is also possible to derive another kind of concrete structure, the most described rotating shaft is valve rod itself, closes valve clockwork spring and can be assemblied on valve rod.Sector gear is arranged on a bridge shaft, and sector gear exists one relative to bridge shaft and rotates complementary angle, and bridge shaft there is also one relative to rotating shaft and rotates complementary angle, two complementary angle sums, is just equal to the described sector gear freely rotatable angle relative to rotating shaft.
When for spool movable valve, described rotating shaft can be coupled by linkage (such as slider-crank mechanism), cam mechanism, rack and pinion drive mechanism with valve rod (or the connecting rod for push-and-pull barrier film).
In the present invention, manual twisting handle, make main shaft store force direction to clockwork spring and rotate to set the process of timing length, be referred to as timing, after decontroling handle, clockwork spring starts to discharge potential energy, drives the process of each component actuation, referred to as timing.The rotating forward that description is mentioned, refers to each parts rotation direction in timing process, including the rotation direction opening valve；Reversion, refers to each parts rotation direction in timing course, including the rotation direction closing valve.Revolution, is the rotation that finger is contrary with rotation direction last time.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of mechanism type based on scheme of the present invention timing ball valve.
Fig. 2 be in Fig. 1 A-A to sectional view.
Fig. 3 is under initial state, the annexation schematic diagram between sector gear and timer spindle.
Fig. 4 is in timing process, opens valve eve, the annexation schematic diagram between sector gear and timer spindle.
Fig. 5 is in timing process, the annexation schematic diagram after valve is opened, between sector gear and timer spindle.
Fig. 6 is in timing course, after sector gear reversion dislocation, and the annexation schematic diagram between sector gear and timer spindle.
Fig. 7 is the annexation schematic diagram after timing terminates, after valve closing, between sector gear and timer spindle.
Fig. 8 is under initial state, the annexation schematic diagram between timer cam and timer spindle.
Fig. 9 is in timing process, the annexation schematic diagram between timer cam and timer spindle.
Figure 10 is in timing process, the annexation schematic diagram between timer cam and timer spindle.
Figure 11 is in timing course, the annexation schematic diagram between timer cam and timer spindle.
Figure 12 is the annexation schematic diagram after timing terminates, between timer cam and timer spindle.
Figure 13 is under initial state, the drive connection schematic diagram between timer cam and locking wheel, locking bar.
Figure 14 is in timing process, the drive connection schematic diagram between timer cam and locking wheel, locking bar.
Figure 15 is in timing process, the drive connection schematic diagram between timer cam and locking wheel, locking bar.
Figure 16 is in timing course, the drive connection schematic diagram between timer cam and locking wheel, locking bar.
Figure 17 is after timing terminates, and the drive connection schematic diagram between timer cam and locking wheel, locking bar, this figure is the inside swing state of locking bar.
Figure 18 is after timing terminates, and the drive connection schematic diagram between timer cam and locking wheel, locking bar, this figure is that locking bar swings out state.
Figure 19 is the locking wheel attachment structure schematic diagram with rotating shaft of reversion limiting mechanism.
Detailed description of the invention
Below in conjunction with the accompanying drawings, as a example by a mechanical type timing ball valve using drive mechanism of the present invention, know-why and the effect thereof of technical scheme of the present invention is described further.
With reference to Fig. 1-19, this group figure is disclosed that a kind of timing can the mechanical type timing ball valve of alarm after terminating, wherein, Fig. 3-7 is sector gear and rotating shaft drive connection under five states of a-e in timing, timing course, Fig. 8-12 show timer cam and timer spindle drive connection under five states of a-e in timing, timing course, and Figure 13-18 show timer cam and locking wheel drive connection under five states of a-e in timing, timing course.
Diagram mechanical type timing ball valve includes mechanical timer and ball valve two large divisions, the escapement speed-adjusting mechanism (not shown) of mechanism type intervalometer can use the relatively simple common pin pallet escapement speed governing of structure, including balance spring mechanism, escapement lever, escape wheel, gear train, flywheel forms, escapement is provided with pendulum nail, escapement lever swings and arranges, jaw has the fork pockets coordinated with pendulum nail, escapement drives escapement lever reciprocally swinging by the matching relationship of pendulum nail with fork pockets, the fork-tail of escapement lever is provided with two cylindrical pins, escape wheel is the gear structure that even circumferential arranges multiple flat tooth, escapement lever is when swinging, two cylindrical pins alternately pass in and out the teeth groove of escape wheel, escapement often swings once, the angle of the rotatable tooth of escape wheel.By gear train transmission between escape wheel and terminal flywheel.
Described terminal flywheel 5 is arranged on timer spindle 1 by internal messing ratchet mechanism, being provided with the first gear 2 for opening valve on the main shaft 1 of intervalometer, topmost set handle for the second gear 3 regularly, main shaft, the first gear 2 engages with sector gear 26.
Timer cam 20 is securely fitted on an axle 23, and cylinder axle also assembles the 3rd gear 22 engaged with the second gear 3.Timer cam 20 is disc structure, and circumference is provided with a recess 32.3rd gear 22 is provided with a pin-and-hole, and timer cam 20 is fixed with the pin 21 in a pin-and-hole stretching into the 3rd gear.Pin 21 coordinates with pin-and-hole, to guarantee timer cam 20 and the 3rd gear 22 synchronous axial system.
Ball valve part includes valve body 10, valve rod 14, spherical spool 13, valve body 10 is fixed together with the housing of timer section, forming the housing 4 of whole valve, valve rod 14 is assemblied in the valve rod pilot hole on valve body 10, and lower end union joint 11 is inserted in the flat mouth of flute profile 12 of spool upper end.
Valve rod is provided with a lateral pin 15 passing valve rod axle center, and the position of correspondence valve rod upper end, valve rod pilot hole upper end lateral pin 15 is provided with two centrosymmetric fan grooves 16.Lateral pin 15 two ends are stretched out the part of valve rod 14 and are laid respectively in two fan grooves 16, and freely rotatable angle in fan groove, the lateral pin end is 90 degree.
Valve rod upper end sets a flat mouth of flute profile, and the lower end union joint 9 of the rotating shaft 27 being coaxially disposed with valve rod is inserted in the flat mouth of flute profile of valve rod upper end, and matches with it.
Being equipped with the clockwork spring dish 8 for closing valve in rotating shaft 27, clockwork spring disk casing is fixed with housing 4, and the clockwork spring the inner within clockwork spring dish is fixed on valve rod, and outer end is fixed with clockwork spring disk casing.
It is provided above a gap bridge gear wheel 7 being assemblied in rotating shaft by internal messing ratchet mechanism 6 at clockwork spring dish 8.Gap bridge gear wheel 7 is annular, and inner edge is ratchet 34, and outer rim is gear, and the rotation direction that ratchet flank of tooth incline direction opens valve with rotating shaft is identical.Gap bridge gear wheel side is provided with a little gear of the gap bridge being engaged with 17, is coaxially installed with the locking wheel 18 setting uniform tooth on a circumference with little gear 17 of passing a bridge.Swinging locking bar 19 one end arranged and be provided with two latches 36 coordinated with the tooth of locking wheel, locking bar 19 can swing when two latches 36 interlock and impacted.The locking bar other end is provided with percussion hammer 35, percussion hammer 35 side is provided with one and hits bell (not shown), a lock pin 31 it is additionally provided with on locking bar 19, described lock pin 31 side is pressed on the circumference of described timer cam 20, when lock pin 31 on the periphery correspondence locking bar beyond timer cam recess 32, the swing of locking bar 19 is stopped by the outer rim of timer cam 20, can not swing, the stress surface of the latch 36 of static locking bar offsets with the flank of tooth of locking wheel 18, locking wheel 18 is locked cannot be rotated, and valve closing action is restricted indirectly.When timer cam rotates the lock pin 31 to the corresponding locking bar of upper recess thereof mouth 32, lock pin 31 on locking bar can freely come in and go out recess 32, the timer cam 20 restriction event resolves to locking bar 19, the locking effect that locking is taken turns by locking bar is i.e. undone, locking wheel 18 and synchronous axial system under closing valve clockwork spring effect of passing a bridge together with little gear 17, gap bridge gear wheel 7, rotating shaft 27, valve rod 14, spool 13, valve is progressively closed off.Meanwhile, the flank of tooth of locking wheel 18 alternately impacts two latches 36 of locking bar, and locking bar swings continuously until valve completely closes.Locking bar often swings once, and on it, percussion hammer 35 clashes into and once hits bell.
In this example, above-mentioned reversion limiting mechanism, on the one hand can limit valve rod reversion, on the other hand realized by the locking bar with double card toothing, while valve closing, locking bar hit bell, reach to point out the effect of user before the inefficacy that is triggered.
Obviously, as need not the tinkle of bells prompt facility, or otherwise prompting user's timing terminates, then arrange a latch coordinated with the tooth of locking wheel on locking bar, and the other end is without arranging percussion hammer.
The effect of carrier gear is to reduce latch impact force, extends locking wheel and locking bar service life, if do not considered this problem, it is convenient to omit carrier gear, is directly assemblied in rotating shaft by ratchet mechanism 6 as gap bridge gear wheel 7 by locking wheel 18.
Sector gear 26 fits over the upper end of rotating shaft 27 by being positioned at the shaft hole sleeve of its center of rotation, sector gear 26 afterbody (opposite side relative with the side setting tooth) is provided with a flat hole of the arc with sector gear center of rotation as the center of circle 30, torsion spring 28 one end 29 is provided with clubfoot, clubfoot 29 is inserted in the flat hole of arc 30, and torsion spring 28 other end is fixed with housing 4.The effect arranging the flat hole of arc is: the clubfoot of torsion spring, during one end, flat hole to the other end, does not interacts with sector gear.This structure can avoid sector gear after the reset by active force that torsion spring is unnecessary.
Below sector gear 26, arranging two fan grooves 24 along axis hole revenue centre symmetry around its axis hole, the two ends of a lateral pin 25 passing the axle center of rotating shaft 27 are separately positioned in two fan grooves 24.Freely rotatable angle in fan groove, lateral pin 25 end, is the sector gear freely rotatable angle relative to rotating shaft.
In this example, effective angle of engagement of described sector gear 26 (starting from the first gear side to be engaged to opposite side dislocation, the angle that sector gear is turned over) is more than the open and close phase angle of described rotating shaft, equal to it relative to the freely rotatable angle of rotating shaft.
Its work process is as follows:
A) before using valve, valve is closed, sector gear is in reversion dislocation state (at the first gear reverse directions lateral dislocation), the forward direction end in the flat hole of arc of sector gear is pressed on the clubfoot of torsion spring end, torsion spring generation forward deformation, torsion spring produces a rotating forward driving force to sector gear so that it is tooth of just changing one's position is resisted against on the tooth of the first gear, as shown in Figure 3.Now, sector gear is equal to the difference at its freely rotatable angle relative to rotating shaft and the open and close phase angle of described rotating shaft in forward direction relative to the rotating freely for angles of rotating shaft.Reverse directions is equal to the open and close phase angle of described rotating shaft relative to the rotating freely for angles of rotating shaft；
When b) beginning to use valve, rotate forward timer spindle, first gear rotates forward, sector gear starts to engage with the first gear under torsion spring effect, and rotate forward therewith, when the anglec of rotation of sector gear is equal to its freely rotatable angle relative to rotating shaft with the difference of the open and close phase angle of described rotating shaft, the end face of the fan groove reverse directions side below sector gear contacts with the lateral pin in rotating shaft, now, sector gear relative to the freely rotatable angle of rotating shaft all in its reverse directions, as shown in Figure 4.Sector gear continues to rotate forward with the first gear, rotating shaft will be driven to start to rotate forward by lateral pin；
C) when sector gear is at the first gear forward direction lateral dislocation, the angle that sector gear turns over is equal to its freely rotatable angle relative to rotating shaft, then rotating shaft is just equal to the open and close phase angle of rotating shaft with the angle that sector gear turns over, now, valve fully opens, and sector gear is relative to the freely rotatable angle of rotating shaft or all in its reverse directions.And now, the reverse directions end in the flat hole of arc of sector gear is pressed on the clubfoot of torsion spring end, torsion spring has crossed its forward critical point, occurs reversely to open change, and it is reverse to the active force of sector gear, sector gear produces a reversion driving force, as shown in Figure 5.The recess of timer cam moves clockwise to opposite side, and the lock pin of locking bar end is against in timer cam outer rim, and a rear latch embeds in locking wheel teeth groove, and rotating shaft reversion is limited, as shown in figure 15；
D) timing handle is decontroled, timing starts, first gear starts reversion with main shaft under timing spring effect, sector gear starts again to engage with the first gear under torsion spring effect, and invert therewith, the angle turned over when sector gear is equal to its freely rotatable angle relative to rotating shaft, and it is disengaged from the first gear, it revert to invert dislocation state, as shown in Figure 6.Now, the end face of the fan groove forward direction side below sector gear just contacts with the lateral pin in rotating shaft, but does not interacts, and torsion spring returns forward deformed state, starts sector gear produces a rotating forward driving force.In the whole Umklapp process of sector gear, because the existence at freely rotatable angle, there is not action in rotating shaft；Groove in timer cam is not yet turned back to start bit, and reversion limiting mechanism state is constant, as shown in figure 16；
E) timing terminates, timer cam recess returns start bit, lock pin can freely come in and go out recess, rotating shaft inverts under closing valve clockwork spring effect, begins to shut off valve, drives locking wheel to rotate by ratchet mechanism, carrier gear simultaneously, two latches on the locking wheel flank of tooth alternately impact lock pin, locking bar swings continuously, and percussion hammer the most outwards clashes into, such as Figure 17, shown in 18.When reverse angle reaches the switch phase declinate of rotating shaft, valve is fully closed, now, each parts of Timed valve all return to original state, and sector gear is equal to the difference of the open and close phase angle of freely rotatable angle and described rotating shaft in forward direction relative to the freely rotatable angle of rotating shaft.Relative to the freely rotatable angle of rotating shaft equal to the open and close phase angle of described rotating shaft in reverse directions, as shown in Figure 7.
Being not difficult to find out by above procedure, during whole, the end face of the fan groove forward direction side of sector gear is not had an effect with the lateral pin in rotating shaft.It is to say, sector gear can be bigger relative to the freely rotatable angle that axle turns, have no effect on its action effect, as long as meeting following condition:
1, in an initial condition, when sector gear is dislocated in reverse directions, and valve is closed, and sector gear should exist rotating freely for angles (R relative to rotating shaft in forward directionJust close), this rotating freely for angles is equal to the effective angle of engagement (R of sector gearEngagement) and the open and close phase angle (R of rotating shaftSwitching difference) difference.On the one hand this condition ensures, sector gear, before reset, is not had an effect with rotating shaft, and sector gear then can be from dislocation state reset under the effect much smaller than the moment of torsion of controlled valve, it is achieved engage with the first gear.On the other hand ensureing, when sector gear is dislocated in forward direction, valve is completely open；
2, sector gear is not less than the effective angle of engagement (R of sector gear relative to the freely rotatable angle (R) of rotating shaftEngagement).This condition ensures at sector gear when inverting, and does not drive rotating shaft to close valve in advance；
It is formulated as: RJust close> 0, RJust close+RSwitching difference=REngagement, R >=REngagement。
Drive connection between above-mentioned sector gear and rotating shaft, is the key point realizing " the setting time opens valve simultaneously, and timing terminates early gate and is not turned off " this purpose.
It is contemplated that be, if as the torsion spring of sector gear resetting-mechanism sector gear can being produced and enough overcoming pass valve clockwork spring and valve rod, the moment of torsion of spool frictional resistance, the most in an initial condition, sector gear can not have the rotating freely for angles relative to rotating shaft in forward direction.It is, the lowest term realizing " open valve during setting, and timing terminates early gate and is not turned off " this purpose is simultaneously: the effective angle of engagement (R of sector gearEngagement) it is not more than the sector gear freely rotatable angle (R) relative to rotating shaft, nor less than the open and close phase angle (R of rotating shaftSwitching difference).When sector gear is dislocated in forward direction, valve is opened, and now its relative to the freely rotatable angle of rotating shaft in its reverse directions, i.e. now, sector gear in reverse directions relative to the rotating freely for angles (R of rotating shaftCounter open) it is equal to the sector gear freely rotatable angle relative to rotating shaft；
It is formulated as: R >=REngagement≥RSwitching difference, RCounter open=R。
In addition, in this example, the non-valve rod of rotating shaft, but rotate with valve rod coaxial synchronous, the effect that its transmission effect is valve rod itself with rotating shaft is identical, the difference is that only in the convenience that parts are installed, clockwork spring dish to be installed in rotating shaft, anti-reverse gear, for installing multiple parts such as the cylinder axle of timer cam, spool to be connected on valve rod, and 90 degree of switch position limiting structures are set, if rotating shaft and valve rod are same axis, will realize the assembling on same axis of multiple parts, the structure of its whole axle is by extremely complex.Rotating shaft and valve rod split design, and can need not consider, when designing pivot structure, the relation that spool, valve body etc. assemble therewith, and the parts such as clockwork spring dish, anti-reverse gear, timer cam cylinder axle, rotating shaft can be loaded respectively from two ends, pivot structure is the most relatively easy.The installation of each parts is the most convenient.
Claims (10)
1. the drive mechanism for mechanical type timing valve, it is characterized in that, the rotating shaft of valve is opened or closed by forward and reverse campaign, for the sector gear of rotating shaft Yu the limited linkage of timer spindle including one, described sector gear has a freely rotatable angle relative to rotating shaft, effective angle of engagement of described sector gear is not less than the phase angle of the open and close valve of described rotating shaft, and no more than sector gear is relative to the freely rotatable angle of rotating shaft, sector gear resetting-mechanism promotes the sector gear of dislocation to be close to connected gear.
Drive mechanism the most according to claim 1, it is characterised in that when sector gear is dislocated in forward direction, valve is in open mode, and sector gear relative to the freely rotatable angle of rotating shaft in its reverse directions.
Drive mechanism the most according to claim 1, it is characterized in that, when sector gear is dislocated in reverse directions, valve is closed, there is rotating freely for angles relative to rotating shaft in sector gear in forward direction, this rotating freely for angles is equal to the difference of effective angle of engagement of sector gear and the open and close phase angle of rotating shaft.
Drive mechanism the most according to claim 1, it is characterised in that described sector gear is sleeved in described rotating shaft by axis hole loose fit, and described rotating shaft and sector gear are respectively provided with the position limiting structure cooperated.
Drive mechanism the most according to claim 4, it is characterized in that, described sector gear by peg-in-hole assembly thereon in rotating shaft, the axis hole of sector gear is slidably matched with rotating shaft surface, it is provided with circumferentially extending groove along axis hole edge, rotating shaft is provided with the projection with groove fit, and groove circumferential width is more than projection circumferential width.
Drive mechanism the most according to claim 4, it is characterised in that below described sector gear, arranges two fan grooves along axis hole revenue centre symmetry around its axis hole, and the two ends of a lateral pin passing rotating shaft core are separately positioned in two fan grooves.
Drive mechanism the most according to claim 1, it is characterised in that on described timer spindle, assembling is for opening the first gear of valve, and the first gear engages with described sector gear.
Drive mechanism the most according to claim 1, it is characterised in that described sector gear resetting-mechanism includes a torsion spring, one end is hooked on the afterbody of sector gear, and the housing of the other end and Timed valve is fixed.
Drive mechanism the most according to claim 8, it is characterised in that sector gear afterbody is provided with a flat hole of the arc with sector gear center of rotation as the center of circle, one end be provided with clubfoot, clubfoot is inserted in flat hole.
Drive mechanism the most according to claim 1, it is characterised in that be provided for the pass valve clockwork spring of drive shaft reversion in rotating shaft.
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| CN103742705B true CN103742705B (en) | 2016-08-17 |
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| CN106885037B (en) * | 2017-03-06 | 2018-09-14 | 河南工程学院 | A kind of transmission mechanism for mechanical type timing valve |
| CN109730547B (en) * | 2018-12-28 | 2021-04-09 | 周斌 | Energy-saving and environment-friendly cooking device |
| CN111963751B (en) * | 2020-08-19 | 2022-04-19 | 捷耐特阀门集团有限公司 | Water supply valve |
| CN214946780U (en) * | 2021-04-28 | 2021-11-30 | 成都秦川物联网科技股份有限公司 | Valve core transmission part, valve controller and valve |
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| US3894557A (en) * | 1972-12-07 | 1975-07-15 | Mallory & Co Inc P R | Control valve for a gas range timer |
| CN200999878Y (en) * | 2007-01-10 | 2008-01-02 | 庄革 | Thread losting in-position indicating valve |
| CN101725753A (en) * | 2009-12-21 | 2010-06-09 | 阮迪荣 | Dislocable and resettable gear transmission mechanism of electric control valve |
| CN202215834U (en) * | 2011-08-22 | 2012-05-09 | 靖江市沙龙家用电器有限公司 | Safety timing valve of mechanical fuel gas pipeline |
| CN203585518U (en) * | 2013-10-11 | 2014-05-07 | 阮迪荣 | Transmission mechanism used for mechanical-type timing valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100985575B1 (en) * | 2008-05-29 | 2010-10-06 | 주식회사 케이씨텍 | Shutter for valve of high pressure bombe |
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| US3894557A (en) * | 1972-12-07 | 1975-07-15 | Mallory & Co Inc P R | Control valve for a gas range timer |
| CN200999878Y (en) * | 2007-01-10 | 2008-01-02 | 庄革 | Thread losting in-position indicating valve |
| CN101725753A (en) * | 2009-12-21 | 2010-06-09 | 阮迪荣 | Dislocable and resettable gear transmission mechanism of electric control valve |
| CN202215834U (en) * | 2011-08-22 | 2012-05-09 | 靖江市沙龙家用电器有限公司 | Safety timing valve of mechanical fuel gas pipeline |
| CN203585518U (en) * | 2013-10-11 | 2014-05-07 | 阮迪荣 | Transmission mechanism used for mechanical-type timing valve |
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