CN103352810B - Generate electricity for valve acutator - Google Patents
Generate electricity for valve acutator Download PDFInfo
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- CN103352810B CN103352810B CN201310260693.3A CN201310260693A CN103352810B CN 103352810 B CN103352810 B CN 103352810B CN 201310260693 A CN201310260693 A CN 201310260693A CN 103352810 B CN103352810 B CN 103352810B
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- Electrically Driven Valve-Operating Means (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The present invention proposes a kind of operation utilizing valve acutator and produces electric energy.The a part of mechanical energy produced by the operation of valve acutator is converted to electric energy.Mechanical energy can be converted to electric energy while valve acutator works, or mechanical energy can be stored, in order to converts subsequently.Valve acutator can pass through craft, electric energy, pneumatically or hydraulically handle.Produced electric energy can also be stored.
Description
The application is on March 7th, 2006 for enjoying the applying date and is called the divisional application of application number 200680054515.3 of " generating electricity for valve acutator ".
Technical field
Present invention relates in general to valve acutator (or valve actuator), more particularly, be related to the electronic installation generating of described valve acutator.
Background technology
Valve acutator is used to handle valve, and with various shape, size, form is manufactured, and serves many purposes.Operator for valve acutator, it is often desirable that understand the particular location of valve.Already absolute encoder and incremental encoder were applied on valve acutator, to determine the position of valve.The position of valve acutator described in described encoders monitor, in order to determine the corresponding position of valve.
Unique recognition marks is used for each position of valve acutator by absolute encoder.Absolute encoder generally includes single disk or multiple disk, and these disks rotate when valve acutator moves to diverse location.The single or multiple disks of absolute encoder have multiple labelling, and the different combination of these labellings provides unique recognition marks of each position of valve acutator.The recognition marks of this uniqueness can be analyzed at any time, to determine the position of described valve acutator.
On the other hand, incremental encoder does not possess unique recognition marks of each position for described valve acutator.Means as an alternative, the change of the relatively arbitrarily starting point of valve acutator described in incremental encoders monitor, such as the of completely closed position of valve.Incremental encoder is also referred to as relative encoder, and it can be the single disk having a series of repeating label at the perimeter of disk.When described disk rotates, there is one of them labelling by a point, the change of record position every time.Such as, if disk has 100 labellings at the perimeter of this disk, this disk just can rotate repeatedly, and therefore can add up hundreds of labellings, with the change of indicating positions.As long as described labelling is recorded in the memorizer of computer, then just it will be seen that the position of described valve acutator, and can by using the airborne electronic equipment device of status contact to be shown in the data bit in the data register that user is readable or on alpha-numeric displays.
Valve acutator generally also has control handwheel (or steering wheel), when motor breaks down or power failure occurs so that described valve can be carried out manual operations.But, run out of steam the position instruction that can lead to errors, if described control handwheel is moved, and power-off simultaneously, and there is no back-up source or the words of redundant power supply.After the handwheel is moved, the shortage of renewal may result in a kind of position of valve acutator instruction, and meanwhile, actually described valve is in different positions.The instruction of described position automatically corrected as early as possible by the actuator using absolute encoder when power recovers.The actuator using incremental encoder must have back-up source or redundant power supply, in order to allows them to avoid total loss location status understood in outage.For this situation, when losing electric energy (or power), incremental encoder or recover its original position, or its magnitude of current is saved in the non-volatile memory location of the electronic installation carried.If described control handwheel is moved on incremental encoder system, described electronic installation may proceed to follow the tracks of described position, as long as described back-up source or redundant power keep effectively.But, if back-up source or redundant power exhaust (such as, the battery of inefficacy), then the actuator system based on incremental encoder will lose the correct perception to position, if the user while back-up source or redundant power exhaust after the words of mobile operating dish.In turn, incorrect positional information may result in again valve damage and the incorrect operating process controlled by described valve.Correct positional information can be kept when loss of normal power, as long as possessing back-up source or redundant power based on absolute or incremental encoding type system.Absolute encoding system is also possible to during total power loss to lose its ability indicating tram, and but, it can recover when recovering power at once.On the other hand, described incremental system needs to re-calibrate after total loss of power, if the user while outage moves the words of control handwheel.User generally remains mobile valve, and this valve operates in active process, in order to re-calibrate described position sensor.For this, even on a single valve, it usually needs comprehensively factory shuts down.
The sensing of positional information is needed electric energy by absolute or incremental encoder.It addition, when using incremental encoder, it is necessary to positional information is preserved in memory by extra electric energy.Absolute encoder does not need save location information, because described information can be determined easily by absolute encoder.The valve acutator utilizing incremental encoder needs reserve battery retention position information when there is power failure.For absolute and incremental encoder, positional information must be shown by stand-by power supply during mains power failure.
The positional information that during there is a need in the art for the manual operation of valve acutator, electronical display is up-to-date, and don't need reserve battery.This area needs other electronic unit of valve acutator is powered.It addition, there is a need in the art for hydraulic pressure and pneumatic valve actuator is powered, and don't need to be powered by external power source.
Summary of the invention
One embodiment of the present of invention is a kind of method of part power supply to valve acutator, and it includes handling described valve acutator, to produce mechanical energy, a part for described mechanical energy converts to electric energy, and by described electric energy, the described part of described valve acutator is powered.
Handle described valve acutator and include valve acutator described in manual manipulation.Also include the normal operation interrupting described valve acutator, and wherein, handle described valve acutator and include valve acutator described in manual manipulation.Produced mechanical energy is stored before being additionally included in the part converting described mechanical energy.Also include the release being triggered stored mechanical energy by valve acutator described in manual manipulation.Also include described electrical power storage in energy storage device.The described part of described valve acutator is powered and includes position coder is powered.The described part of described valve acutator is powered and includes at described valve acutator providing power during operation.Handle described valve acutator and include triggering by the external source generation mechanical energy of described valve acutator to produce mechanical energy, and wherein, the part power supply of described valve acutator is included the powering auxiliary electronics to described valve acutator.
One embodiment of the present of invention includes the system of a kind of powering auxiliary electronics for valve acutator, and this system includes valve acutator, and is well-suited for the electromotor of the powering auxiliary electronics of described valve acutator.
One embodiment of the present of invention includes a kind of power supply for valve acutator, it includes TRT, it is suitable for mechanical energy from the drive train of valve acutator to the input equipment of described TRT, it is suitable for the engagement device described input equipment and described TRT being operatively coupled, and is suitable for controlling the control device when described input equipment and described TRT are operatively coupled by engagement device.
Specifically, the present invention proposes a kind of valve acutator, and it includes: power train；And the electromotor being mechanically connected with described power train.
Described power train includes control handwheel.Described power train also includes clutch, and the exercisable remainder by described control handwheel with described power train of described clutch is isolated.Described power train includes worm and worm wheel.Described power train includes actuator stem.Described electromotor is at least partially integrated on the parts of described power train.Described electromotor is at least partially integrated on the parts of the valve activated by described valve acutator.Also include the spring wound being mechanically connected between described power train and described electromotor.Also include the clutch mechanism being mechanically connected between described power train and described electromotor.Also include the acceleration mechanism being mechanically connected between described power train and described electromotor.Also include the reducing gear being mechanically connected between described power train and described electromotor.Also include the apparatus for storing electrical energy electrically connected with described electromotor.Also include position coder and the position indicator electrically connected with described electromotor.Described power train includes control handwheel and motor, and wherein, described electromotor is rotary generator, and also includes the position coder and the position indicator that electrically connect with described electromotor.
The present invention is it is also proposed that a kind of system for the powering auxiliary electronics for valve acutator, and described system includes: valve acutator；Electromotor with the powering auxiliary electronics being well-suited for described valve acutator.
Described electromotor is suitable for exchange or direct current output.Described electromotor is positioned at outside described valve acutator.Described auxiliary electronic device is respectively selected from following group, and described group includes: at least one indicator, at least one circuit board, and at least one controls module, at least one encoder, at least one communication line, at least one transmitter and at least one receptor.Described auxiliary electronic device includes the external electronic electrically connected with described valve acutator.
The present invention proposes a kind of power supply for valve acutator, and described power supply includes: TRT；Be suitable for mechanical energy from the drive train of described valve acutator to the input equipment of described TRT.
Also include: be suitable for the engagement device described input equipment and described TRT being operatively coupled；Be suitable for controlling the control device when described input equipment and described TRT are operatively coupled by described engagement device.Described control device is realized by identical device with described engagement device.Described control device, described engagement device and described TRT are to be realized by identical device.Also include the speed adjusting device being suitable for the speed of the speed described TRT of raising of relatively described input equipment.Also include the apparatus for storing electrical energy being suitable for receiving electric energy from described TRT.Also include the PCU Power Conditioning Unit being suitable for changing the electricity output of described TRT.
Read described further below in conjunction with the drawings, it will be appreciated by those skilled in the art that inventive feature, advantage and various aspects.
Accompanying drawing explanation
Although this specification terminates with claims, particularly pointing out and be distinctly claimed the scope of the present invention, advantages of the present invention is read the explanation of the present invention in conjunction with the drawings and can be determined more easily, wherein:
Fig. 1 represents electrically driven valve actuator；
Fig. 2 represents the valve acutator of pneumatic actuation；
Fig. 3 represents an embodiment of power supply of the present invention；
Fig. 4 is the sectional view of the embodiment shown in Fig. 3, it is shown that the solenoid (or solenoid) of energising and the clutch being disengaged；With
Fig. 5 is the sectional view of the embodiment shown in Fig. 3, it is shown that the solenoid of power-off and the clutch of joint.
Detailed description of the invention
The method of the present invention, equipment and system can be used to power to valve acutator.In one embodiment, the present invention can be used to power to electrically driven valve actuator when there is power failure.In other embodiments, the present invention can be utilized for the power electronic equipment in non-electrically driven valve actuator.The example of non-electrically driven valve actuator includes the valve acutator (valve acutator as by control handwheel (or steering wheel) or lever actuated) of manually manipulation, pneumatic valve actuator and hydraulic valve actuators.The present invention can use together with any kind of power source of valve acutator with known in the art.The present invention can be additionally used in electrically driven valve actuator, wherein, there is the electric energy for operated motor, but, it is desirable to for the power supply that other electronic unit offer of described driver is different.Any electronic unit that the present invention can be used for valve acutator is powered, and does not include the electric motor prime mover of electrically driven valve actuator.
Fig. 1 represents the electrically driven valve actuator not having the present invention.Fig. 1 represents a kind of form of electrically driven valve actuator, and is not meant to the purposes of the present invention is confined to any electrically driven (operated) or other form valve acutator.Valve acutator 20 includes the motor 4 coupled with worm shaft 3.Control handwheel 1 is connected with handwheel adapter 11.Handwheel adapter 11 is connected with drive sleeve 2.Drive sleeve 2 is connected with valve stem nut (not shown).Worm gear 10 and worm shaft 3 closely cooperate.Worm gear 10 is also connected with valve stem nut, and it can drive the valve rod of valve.In FIG, unshowned valve acutator 20 is connected with valve.Can promote or decline valve rod in the operation (or manipulation) of motor 4 or control handwheel 1.Described valve rod can pass through on the mediad of control handwheel 1 and move downward.Described valve rod can also rotate and handle the nut in described valve, and it can be turned on and off described valve or valve can directly rotate to the state of being turned on and off (such as, butterfly valve, the situation of leaf valve or ball valve).
Valve acutator 20 can include any power train, hardware, device, electronic device (or electronic installation), and/or is used for handling the software of valve.Valve acutator 20 can be designed to any kind of valve, it may for example comprise linear valve, right-angled bend rotary valve (quarter-turnrotary), multipurpose rotary valve, ball valve, plug valve, sluice valve, butterfly valve and diaphragm valve.The parts of valve acutator 20 can arrange in any form.The direction of control handwheel 1 can towards the side orientation of valve acutator 20, as is well known the art.
Described power train includes any prime mover, any manual operation mechanism, any is disengaged or interrupter, arrestment mechanism, any speed regulating mechanism, and the mechanism for being connected with valve.Power train can also get rid of any of the above described parts maybe can also include other parts.It is merely to illustrate that purpose, Fig. 1 illustrate the motor 4 as described prime mover and the control handwheel 1 as manual operation mechanism.Generally, clutch mechanism can be included so that the operation of motor 4 or control handwheel 1 will not result in the operation of another one.For example, lever 5 and clutch linkage 13 could be arranged to be disengaged or interrupter.Multiple clutch and engaging mechanism are well known in the art.Clutch linkage 13 can be designed to engage or be disengaged any part of the power train of valve acutator 20.
In FIG, described arrestment mechanism and speed regulating mechanism are all bonded on worm shaft 3 and worm gear 10.As the replacement of worm gear 10 and worm shaft 3 or supplement, it is possible to by other type of gear or gear is not used on valve acutator 20.The amount usually reduced according to speed for the gear-type of valve acutator carries out selecting, if any, between motor 4 and valve stem nut.Hereinafter, when referring to the gears of the drive train of a valve actuator, the main example using worm gear and worm shaft.Any gear is can be applicable to it is to be understood, however, that described above.If being absent from gear on described valve acutator, then any applicable prime mover output mechanism can meet needs equally.
In the example depicted in fig. 1, can be valve stem nut and relevant supporting construction for connecting the mechanism of valve, as is well known the art.But, it is possible to use any mechanism for connecting well known in the art.Term as used herein " valve " includes this term modal usage in the art, including the definition of the device to the flow controlling liquid, gas, and/or solid at least partly.Motor 4 can be able to handle any electrically driven (operated) prime mover of valve acutator.
Fig. 1 is also represented by the rare attached or auxiliary electrical components of valve acutator.In this article, term " attached " and " auxiliary " represent any part of the parts of the valve acutator utilizing electricity rather than described motor itself.One concrete example of encoder 6 illustrates to take turns absolute encoder form more.Encoder 6 can also is that single wheel absolute encoder or incremental encoder.It is well known in the art for having multiple encoder.Fig. 1 also show the control module 8 for controlling motor 4, and illustrates for receiving the input (signal) from panel 7, and for sending the circuit board 15 of output (signal) to indicator 12.
In this particular example, indicator 12 is shown as liquid crystal display (LCD).One or more indicator 12 can be provided.The minority indefiniteness example of indicator includes light emitting diode (LED) and display, and electrical filament is luminous and graduated disc.The multiple indicator for valve acutator well known in the art can be used, such as electricity Pointers (or electronic pointer).
Valve acutator can use any number of accessory electrical components (not shown), and powered by the present invention.For example, it is also possible to use the polytype sensor for monitoring encoder 6, and need to be electronically entered.Some indefiniteness examples of sensor are optical pickocffs, magnetic sensor, and hall effect sensor.Valve acutator 20 can also include any amount of sensor for other purposes.May be provided for processor and relevant parts (such as, diode, gate valve (or gate), resistor etc.), for converting the signal from described sensor to valve position data.May be provided for memorizer, for save location data.It is, of course, also possible to offer processor, memorizer, and the multiple circuit board component unrelated with encoder 6, and any sensor, and powered by the present invention.
The invention is not limited in any specific valve acutator, and can be applicable to any valve acutator.Fig. 2 represents the valve acutator of pneumatic actuation well known in the art, i.e. valve acutator 40.Shown valve acutator 40 coordinates with valve 36, and, actuator stem (or actuator rod) 22 is connected with connector 30.The motion of actuator stem 22 result in the corresponding motion of connector 30, the operation of described motion control valve 36.Valve 36 can be globe valve, sluice valve, ball valve, butterfly valve, plug valve, and diaphragm valve maybe can pass through any other type of valve of actuator.Shown actuator stem 22 and connector 30 are for typical globe valve.It is to be understood, however, that any parts can be improved according to the type of the valve used.It addition, when being used below phrase " power train ", this phrase includes the driver part of valve acutator 40, such as actuator stem 22.
Valve acutator 40 can also include any number of electronic unit, for instance, position sensor, circuit board, and indicator.Any electronic installation for valve acutator well known in the art and/or software can be included.Any electronic unit of valve acutator 40 is powered such as through the present invention.
The present invention utilizes the operation of valve acutator to produce electric energy.In a specific embodiment, a part of mechanical energy produced by the operation of valve acutator is converted into electric energy.Described mechanical energy can convert electric energy to, and meanwhile, described valve acutator is in work, or described mechanical energy can store to change subsequently.In another embodiment, the operation of described valve acutator starts the generation of electric energy by described electromotor.Described valve acutator can be manual, electronic, pneumatic, hydraulic pressure, or otherwise handles.Preferably, described conversion can be completed by electromotor；But, any resource that can be used for producing electric energy can be used in the present invention, including except directly from the driving except the power train of driver.
Include rotating as term as used herein " electromotor " or " TRT ", back and forth, linearly, and piezoelectric generator, and other device any for producing electric energy well known in the art.Described electromotor can according to electromagnetic induction principle well known in the art, and piezoelectric principle or other principle any work.Term " electromotor " includes AC and produces, and as produced by alternating current generator, and DC produces.For rotary generator, critical piece is rotor and stator.Usual described rotor is Magnet, such as permanent magnet or electric magnet.There is the rotor of single Magnet be referred to as there are two poles (north and south poles).There is the rotor of two Magnet be referred to as there are four poles.The rotary generator of the present invention can have any number of pole.Stator generally include copper wire coil or consisting of.There is faradic any wire wherein or material can be used in the present invention.The rotation of described Magnet induces current into the wire of described stator.It addition, wire can rotate around Magnet, in order to induce current into (or sensing) described wire.Term as used herein " Magnet " represents any device for producing magnetic field well known in the art.
In a specific embodiment, described electromotor includes the parts of the described valve acutator driven by described power train.In another embodiment, described electromotor can at external connection valve acutator, and such as close control handwheel, close valve acutator exports, or near valve rod.In other embodiments, described electromotor is not connected with described valve acutator.Such as, described electromotor can be connected with described valve.It addition, described electromotor may be completely independent of described valve acutator and described valve.
Described electromotor can directly receive the mechanical energy of the power train from valve acutator.The rotation of any parts of described power train, reciprocal or linear movement can be used in handling described electromotor.In another embodiment, described electromotor can from by the intended recipient machinery energy of described valve acutator effect.Such as, it is provided that described electromotor can be transferred to from described valve rod to a part for the described mechanical energy of valve rod.The motion of described valve rod can be used for handling described electromotor.In another embodiment, it is not applied to handle described electromotor from the mechanical energy of described valve acutator.On the contrary, it is possible to use independent mechanical energy source, such as electromotor.In such embodiments, the operation of described valve acutator starts the operation of described electromotor.
Described electromotor may be suitable for receiving the mechanical energy of any parts from valve acutator.Described electromotor can be designed to receive the mechanical energy from input equipment, such as the rotating shaft driven by any valve actuator component, gear or linear movement bar.It addition, power train part may be suitable for the input equipment acting on described electromotor.In one embodiment, described input equipment can be the axle driven by the gear integrated with described drive sleeve, such as drive sleeve 2(Fig. 1 of power train).In another embodiment, described input equipment can be axle, wherein, is positioned at little gear and the worm gear of one end of this axle, as worm gear 10 coordinates (Fig. 1).The other end of described axle drives described electromotor.In another embodiment, described electromotor is by worm shaft, such as (Fig. 1) that worm shaft 3 drives.In another embodiment, tooth bar can with actuator stem, as actuator stem 22 integration (Fig. 2).Described tooth bar driving pinion again in turn, during the actuating of valve, described tooth bar moves up and down.The rotation of described little gear can drive again rotary generator in turn.Described input equipment can have one or more parts, for instance, various axles, gear, chain, transmission band, pulley, train, coupling, hydraulic pump and driving device.It is contemplated that described input equipment can be driven by any parts of described driver, cause the motion of described pipe, output shaft or drive sleeve.Any device for conveying machinery energy can be used.
In a specific embodiment, described electromotor is designed to receive described mechanical energy, handles described valve acutator simultaneously.In one embodiment, only it is manually manipulated at described valve, as, during by control handwheel or lever control, described mechanical energy is just carried in described input equipment.This can realize in many ways.Such as, described input equipment is suitably adapted for the motion (such as linear or rotary motion) when described valve is manually manipulated.The indefiniteness example of such a device includes gear, as helical gear is incorporated in drive sleeve.Input equipment, have suitable little gear axle can with as described in gear and electromotor coordinate.The rotation of the control handwheel being connected with described drive sleeve can drive described electromotor.
In another embodiment, valve acutator includes clutch, releases the joint of described driver, causes departing from motor driver (or motor drive) and the coupling of described drive sleeve, and makes control handwheel be connected with described power train.This sometimes can make described worm shaft depart from connection, but described motor can also be made to depart from and couple.Therefore, the input equipment of described electromotor can be designed to interval or continuous print work.
Another kind of scheme, described input equipment can operate whenever moving of described valve acutator, but, mechanical energy can not be transported to described electromotor by described input equipment, unless manual operations is used as the source of described operation.When handling valve acutator, described input equipment can be moved, but, mechanical energy can not be transported to described electromotor.In this example, if described input equipment can not drive the parts worked always, then the whenever rotation that described input equipment can work at described motor or described control handwheel.But, if engagement device, clutch be disconnected as described in input equipment with as described in the connection of electromotor, the rotation of described input equipment would not cause mechanical energy transmission to described electromotor.Described clutch can pass through to control device, such as solenoid controlled, just allows only when the handwheel is the source of operation to engage.Described solenoid can be started by power-off or other known mode any.Therefore, only manual operations can cause the transmission of mechanical energy, but electrically operated can automatically disengaging couples described electromotor.
In another embodiment, whenever valve acutator operates, a part for described mechanical energy may be converted into electric energy.Adopt example above, if described clutch engages always, described valve acutator operated whenever described electromotor is activated.It addition, when described input equipment is by when during the operation of described valve acutator, the parts (such as, the motion of actuator stem) of motion drive, it is required that described clutch is not likely to be.In this case, whenever described valve acutator works, electric energy can both be produced.
In another embodiment, when motor just works, rather than when control handwheel just works, mechanical energy can be converted.These parts that only just can move when described prime mover just works by driving input equipment to leave realize.
It addition, the mechanical energy from described valve can store to be utilized by described electromotor subsequently.The mode having multiple storage mechanical energy is to it is known in the art that such as, utilizes spring.Term as used herein " spring " includes single or multiple spring.For example, multiple springs can be connected, are arranged in parallel.For such embodiment, when the power train of described valve acutator rotates (by worm shaft or worm gear), the input equipment (such as axle) being operationally connected with described worm shaft or worm gear can be driven and wind spring in turn.Described spring is used to again drive electromotor in turn.When the control handwheel of described valve acutator is fitted with crank, the mechanical energy release that will store in described spring, in order to drive described electromotor.In this embodiment, the once motion of described control handwheel can cause that electric energy is generated, and described electric energy can be used for powering for the positioning indicator with valve acutator.When electric energy is resumed, and when described motor can work, described motor can wind described spring or a series of spring again by the different parts of described power train.Described valve acutator can be prepared when upper once power failure subsequently.
Equally possible favourable, including being building up in described valve acutator or building one group of electrical pickoff near described valve acutator, wherein, described electrical pickoff can be used for sensing power failure.By this method, power failure is not occurring, but when operator wishes valve acutator described in manual manipulation, described electromotor will not be released from.
Spring is it is merely meant that be applicable to a type of mechanical energy storage device being used in conjunction with.It is, for example possible to use other mechanical energy storage device include flywheel mechanism, compression gas or hydraulic accumulators.When handling mechanical energy storage device by the power train of described valve acutator, it is possible to use spring.
Although the described electromotor already disclosed is for receiving the mechanical energy from described valve acutator, described electromotor may also receive from the mechanical energy in other source.Such as, described electromotor can be designed to receive the energy from gas motor (or electromotor).In this embodiment, described electromotor is used as the generating set that outer drives, and it is used to some or all power supply of described valve acutator, except motor.In this embodiment, described external generator still can be started by the operation of control handwheel.Such as, the operation of control handwheel can trigger electrical contacts, electromotor can be sent the signal of startup by it.Furthermore it is also possible to include detecting whether the one group of electric contact that there is rated power.In this embodiment, in order to make described electromotor start, it is necessary to operate described control handwheel, and must shut off described rated power.When described electromotor does not rely on described valve acutator to supply mechanical energy, described electromotor remains a part for described valve acutator, is incorporated in described valve acutator or is externally mounted on described valve acutator.It addition, other mechanical energy source except electromotor can be used for as described generator powered.
Any suitable electromotor can be integrated in the parts of valve acutator 20.Such as, rotate, back and forth, linear and piezoelectric generator.The critical piece of these electromotors is desirably integrated on valve acutator 20.In one embodiment, when only needing to produce electric energy when described control handwheel is manipulated by, described electromotor can be at least partially integrated on the parts activated by described control handwheel.Such as, drive sleeve 2 or handwheel adapter 11 are used as rotor.Magnet (permanent magnet or electric magnet) can be built into or be connected on any parts, and mode is the electromagnetic field producing to have proper orientation.Coil is desirably integrated on the shell of valve acutator 20, and it surrounds drive sleeve 2 or handwheel adapter 11.It addition, wire is desirably integrated on rotary part, as in handwheel adapter 11 or drive sleeve 2, and Magnet is desirably integrated on the stationary parts of valve acutator 20.It is understood that any suitable method being integrated into by electromotor on the parts handled by control handwheel 1 can be adopted.
In another embodiment, electromotor is integrated on the parts handled by prime mover, for instance on motor 4.Such as, rotary generator can described herein above be integrated on worm shaft 3 with handwheel adapter 11 similar fashion.Electromotor can also be integrated on worm gear 10.In another embodiment, electromotor can be integrated on the parts of actuating, and no matter whether motor 4 or control handwheel 11 are power supplys.Such as, electromotor is integrated on valve stem nut.
Similarly, described electromotor can also be at least partially integrated on the described parts of valve acutator 40.Magnet is desirably integrated into or is attached in actuator stem 22.So stator can surround actuator stem 22.It addition, described stator can be building up to actuator stem spacer 24, drive enclosure 26, or in distributor shell 28.
Described electromotor can also with the element portion of valve or completely integrated.In the embodiment of ball valve illustrated in fig. 2, Magnet can be integrated with or attached on it with connector 30.Stator is desirably integrated on bonnet 32.Similarly, described electromotor can partially or completely be integrated with the valve handled by valve acutator 20.Such as, valve rod may be suitable for being used as rotor.
In all embodiments discussed herein, described electromotor can be used for normal or discontinuous operation (or manipulation).In this article, term " normally " represents the operation of common valve acutator.For electrically driven valve actuator, normal operating utilizes motor, such as motor 4(Fig. 1) to operate valve acutator.Intermittently operated refers to by control handwheel, lever, or other manual operation device, as control handwheel 1 is operated.
Interval or normal operating can by driving the parts of the valve acutator of described electromotor to control.If driving the parts normal operation of described electromotor, then described electromotor just can normal operation.It addition, described electromotor can be driven by the parts of normal operation (such as, the worm shaft 3 of valve acutator 20), but, described electromotor can work off and on.In this embodiment, the input equipment for described electromotor can be described power train part or the axle driven by described power train part, bar or gear, and described input equipment is separated with described electromotor by the device being disengaged.The described device being disengaged can be clutch or other device any becoming two parts for mechanical separation.Therefore, described input equipment can normal operation, but, described electromotor can only intermittently work.Described engagement device can be controlled by control device.
A kind of controlling device for example, it may be desirable to have, it only allows be supplied to motor, such as motor 4(Fig. 1) electric energy allow when being interrupted as described in generator operation.Described control device can be solenoid, piezoelectric, electrostriction material, magnetostriction materials, or any device, or the combination of these devices, these devices have different physical states according to the existence of electric energy, for instance, whether the state of solenoid is likely to be dependent on exists electric current.When running into electric field or magnetic field, can there is elastic strain in electrostriction and magnetostriction materials respectively.
Intermittent power generation can be used for following occasion, and wherein, described valve acutator depends on the electric energy for positioning indicator He other electronic installation, because the Main Patterns for the electric energy of described valve acutator comes from compression air.Similar with described pneumatic valve actuator, the present invention can be used for the valve acutator of hydraulic actuation, maybe can be used to the actuator of mixing, such as, gas over oil actuators, electro-hydraulic pressure safe actuators, the various combinations of gases at high pressure electric actuator and electricity, hydraulic pressure and/or pneumatic actuator.The present invention can be additionally used in right-angled bend or valve acutator of repeatedly turning.
Additionally, it is possible to wish with the speed identical with described valve acutator, with the proportional speed of relatively described valve acutator, or with the constant speed manipulation electromotor unrelated with the speed of described valve acutator.It is thus possible to increase speed adjusting device.Described speed adjusting device can receive the mechanical energy from described input equipment, and described mechanical energy is transported to described engagement device.Other scheme, described speed adjusting device can be arranged between described engagement device and electromotor.Described speed adjusting device can include any suitable machinery, such as gear, axle, transmission band, rubbing device, mucus sheer bonder (viscoussheercoupling), or train, is used for improving, and reduces, or the speed that stable generator runs.
Described speed adjusting device could be included for the change speed gear box making electromotor run in certain speed range.Described speed adjusting device can change according to the needs of described valve acutator.Such as, it is difficult to mechanical large-scale valve acutator can operate with the smaller less speed of actuator, and less actuator is easy to pass through manual manipulation.For bigger valve acutator, it may be necessary to adopt the more gear of the input speed that can improve rotary generator.Less valve acutator can rotate faster, it is therefore desirable to less speed increases.
In addition to the speed modulation means, it is provided that there is the PCU Power Conditioning Unit of the electronic installation of necessity, with the fluctuation of compensation speed aspect.Various diode well known in the art, manostat, transformator, and other electronic unit can be used for the voltage remained stable for.
In a specific embodiment, the present invention can use with together with electrically driven valve actuator.In another embodiment, when rated power not being supplied to described electrically driven valve actuator, and during the work of described control handwheel, produce enough electric energy, in order at least to local status indicators, as position indicator is powered.Preferably, enough electric energy are produced, in order to power for all distant places and local indicators.It is further preferred that produce enough electric energy, in order to all auxiliary electronic devices (i.e. all devices except motor) for described valve acutator are powered.Described auxiliary electronic device can include absolute position encoder or incremental position encoder.
The present invention can not use battery, uses reserve battery or use of simultaneously connecting.Other scheme, it is standby that described battery can be used for the present invention.Rechargeable battery can also be used as reserve battery.Described rechargeable battery can by the generator charging of the present invention.In another embodiment, it is possible to ultracapacitor is charged, working under nominal power, in turn, described capacitor can be electronics for weeks or time several months when rated power is lost simultaneously.Described ultracapacitor can smooth transition, in order to be used as power supply during any rated power loses.
Present invention additionally comprises apparatus for storing electrical energy, do not obscure with mechanical energy storage device previously discussed.In addition to the batteries and rechargeable batteries, described apparatus for storing electrical energy can also include, for instance, capacitor, induction apparatus and/or bladder.Described apparatus for storing electrical energy can play various function, including the energy that purification is produced by described electromotor.By the manual manipulation of described control handwheel, by the work of spring, or the electric energy produced by other source is likely to be of the concordance of change.The change of the speed that electromotor is rotated is likely to produce various problems.Such as, for alternating current generator, the speed of described electromotor determines voltage and the frequency of electric energy output.May be only designed to control the electric energy input of 50 or 60 hertz with the parts of the described valve acutator of exchange way operation.It addition, for some electronic installation, the fluctuation of voltage is probably unacceptable.For DC generator, the change of speed may result in the fluctuation of electric energy output.Much electricity storage device is designed to direct current (DC) output, and in the described embodiment, when described device is battery, described battery can receive the electric energy input of different quality, but, the electric energy of more stable quality can be exported in turn.It addition, PCU Power Conditioning Unit (such as, transformator, commutator, transducer or inverter) can be used for controlling to send to type and the quality of the electric energy of valve actuator electronics.
Present invention resides in the whenever described electromotor of manipulation of valve acutator described in described motor control.Such as, when described valve acutator is designed to make described positioning indicator and other auxiliary electronic device be positioned on the independent circuits of described motor, both circuit must be powered when there is power failure.Other scheme, the present invention can be used for generating electricity when described electric motor operation, therefore, eliminates the needs that two kinds of circuit are powered.
In another embodiment, the present invention can be used for including valve acutator, and described valve acutator has control handwheel, and does not have any kind of prime mover.This can power, and reads for the electric energy or digit position for locating system a long way off or other status information is powered.The electric energy produced by described electromotor can be used for powering for multiple electronic devices and device.Only having on the valve acutator of control handwheel, described valve acutator can couple with described transmitter, when it is activated, it is possible to by the up-to-date positional information of land line, radio communication or valve described in satellite communication transmission.The invention provides the mode powered for the valve acutator being previously isolated.
Similar with the valve acutator only with control handwheel, that another embodiment includes power output shaft or power output shaft (POT) drives valve acutator.The valve acutator that the electromotor of the present invention can drive with power output shaft (POT) couples, in order to produce electric energy, for indicator or any electronic unit.The present invention can be configured to the device sold together with new valve acutator, or it can be designed to the old valve acutator of renovation.
The power supply of the present invention can be designed to, during described valve acutator operates, after operation, or power for both of these case simultaneously.It addition, described electromotor and relevant input equipment can be designed to provide enough electric energy, think the time that any powering auxiliary electronics is longer.The described longer time is simply limited by the type of the electromotor adopted and energy storage device.
Fig. 3-5 represents an embodiment of the power supply 50 of the present invention.In this embodiment, described TRT is rotary generator.Electromotor 1000 is rotated by power shaft 400 by gear train 500.Power shaft 400 can be designed to normal operation, power shaft 400 with as described in the power train of valve acutator be connected.In a specific embodiment, power shaft 400 and described control handwheel, the control handwheel 1 such as valve acutator connects (Fig. 1).Gear 510,530,550 and 570 is used to improve the speed of power shaft 400, in order to the power shaft 1100 of electromotor 1000 rotates at faster speed.Shown gear 510 has the tooth being positioned on gear.Although not shown, tooth may also appear in gear 530 and 550 and little gear 540,560 and 570 on.Shown gear 530 and 550 and little gear 540,560 and 570 be illustrated as spur gear.But, it is possible to use any kind of gear, such as worm gear, helical gear, helical gear or any other type of gear.Being connected to below gear 530 and 550 is little gear 540 and 560 respectively.Gear 510 coordinates with little gear 540, and it drives gear 530；Gear 530 coordinates with little gear 560, and it drives gear 550.Gear 550 coordinates with little gear 570 successively.So, power shaft 1100 receives the speed input improved.Gear 510,530 and 550 and little gear 540,560 and 570(are referred to as " gear and little gear ") represent speed adjusting device an embodiment.Tooth ratio between described gear and little gear can adjust as required, in order to provides suitable input speed for power shaft 1100.Further, it is possible to use less or more gear and little gear.As it can be seen, described gear and little gear may be located between clutch 600 and electromotor 1000.Other scheme, described gear and gear may be located between described power train and described input equipment.Will also be appreciated that the speed improving electromotor and not always required, it practice, would be likely to occur the situation needing to reduce speed input.
In the present embodiment, electromotor 1000 is arranged on installing plate 100.Shown electromotor 1000 has shell 1200.However it should be appreciated that shell 1200 can be with or without.Solenoid 200 is also mounted on installing plate 100.Solenoid is well-known in the art.In a specific embodiment, solenoid 200 is solenoid.But, solenoid 200 can include any suitable solenoid, such as pneumatically or hydraulically solenoid.Solenoid 200 includes plunger 220 and solenoid spring (not shown).Solenoid operation is well-known in the art.Plunger 220 has iron core, and it is connected with the electric coil (not shown) within solenoid.When current is traveling through the coil, the iron core of plunger 220 is attracted and towards the central mobile of coil.Described solenoid spring with and the relative plunger 220 of described coil connect, and described spring is just extended when electric current flows through described coil.When current is not flowing through the coil, described solenoid spring makes the center that described plunger leaves coil retract.Other scheme, when described coil is energized, described solenoid spring just can be compressed.Certainly, the multiple version of solenoid 200 is feasible.Solenoid 200 is only used for the embodiment controlling device of described engagement device.The known any suitable control device for engaging clutch 600 can be used.Will also be appreciated that it is contemplated that do not include the other embodiments of solenoid.
Lever 300 is connected with installing plate 100.Lever 300 includes handle 340 and lever arm 360.The handle 340 of plunger 220 engagement, levers 300 of solenoid 200.When the coil of solenoid 200 is energized, plunger 220 shrinks, and causes that lever 300 pivots so that lever arm 360 is in lower position.When the coil is de-energized, plunger 220 stretches, push handle 340, and makes lever 300 pivot, in order to lever arm 360 moves to upper position.Lever arm 360 engages clutch 600.When plunger 220 is extended, clutch 600 is lifted and causes that power shaft 400 engages gear 510.Lever 300 is a part for an embodiment of engagement device.
Fig. 4 represents the work of clutch 600 when the coil of solenoid 200 is energized.Fig. 5 represents the work of clutch 600 when the coil is de-energized.Referring to Fig. 4, clutch 600 includes clutch spring 620.Clutch spring 620 overcomes the motion of the arm 360 of lever 300.Shown clutch spring 620 is inside clutch 600.But, clutch spring 620 can also around clutch 600, above or below.The clutch spring 620 shown when lever arm 360 is lifted to upper position is just compressed.Other scheme, being lifted to upper position at lever arm 360 is that clutch spring 620 just can be stretched.
In another embodiment, clutch spring 620 can be absent from.When lever arm 360 is moved to lower position, clutch spring 620 is just for being pulled into lower position by clutch 600.In figs. 3-5, lever arm 360 pushes the flange of clutch 600.But, if lever arm 360 is permanently secured to clutch on 600, and lever handle 340 is fastened or connected on plunger 220, then when plunger 220 is by shrinking to described coil electricity, clutch 600 can be pushed into lower position.Therefore, there is no need to there is clutch spring 620.Lever arm 360 can temporarily or permanently be fixed on clutch 600 by any way.
Clutch 600 and selective plane 700 include the specific embodiment of engagement device.Other scheme, clutch 600 can be change speed gear box, and such as electrodeless speed drive, wherein, no matter the speed of power shaft 400 is how many, and electromotor 1000 all rotates with identical speed.
Solenoid 200, lever 300, and the function of clutch 600 can be realized by a single assembly.Such as, clutch spring 620 can also play the effect of solenoid spring.Clutch 600 is probably applicable, in order to when described coil is energized, and attracts the clutch 600 center towards described coil.When the coil is de-energized, clutch 600 can be drawn in the state engaged with gear 510 by clutch spring 620.In this embodiment, it is not necessary to have lever 300.Embodiment at the power supply 50 shown by Fig. 3-5 has more flat profile.In one embodiment, described solenoid 200 and clutch 600 are integrated on a single assembly, and described profile is likely to more prominent.But, the overall dimension (or footprint) of described embodiment is likely to smaller.Therefore, solenoid 200 and clutch 600 are the embodiments of single device is useful under must having narrower power conditions.
Power shaft 400 is only an embodiment of input equipment.Power shaft 400 can with above or any mode being discussed below be connected with valve acutator, or the multiple alternate manner being appreciated by with those skilled in the art connects.
Power supply 50 can have multiple layout.Power supply 50 can be designed to coordinate the various spaces for multiple valve acutator to limit.Limiting with the space of described valve acutator and connect or replace, power supply 50 may be designed to surround the physical constraints of described selected electromotor 1000.Electromotor 1000 can be selected, to meet many indexes, for instance, the power reguirements of described valve acutator auxiliary electronic device, such as voltage or power type, such as exchange (AC) or direct current (DC).When selecting suitable electromotor 1000, it is also possible to analyze electric current and allocation.Furthermore it is possible to select electromotor 1000, merely because it is ready-made electromotor.Under any circumstance, power supply 50 may be designed around actual size and the mechanical input needs of electromotor 1000.
In a specific embodiment, electromotor 1000 is rotary generator.Electromotor 1000 can be direct current or alternating current generator.Electric energy can also be produced by electromotor 1000 when gear 510 rotates.But, in another embodiment, it is transferred to gear 510 from power shaft 400, and the mechanical energy being finally transferred to power shaft 1100 can be stored.Such as, shell 1200 can include spring, and this spring can be transfused to axle 1100 and wind.When the spring is fully wound, described spring can slide or engage, and therefore stops the overwind of described spring.Other scheme, the circuit being connected with the coil of solenoid 200 can be used for being controlled when spring is wound and disengaging and the joint of clutch 600, in order to prevented winding.Electrical pickoff can also be provided in generator casing 1200, think that controller or solenoid 200 send signal, in order to disengage the joint with clutch 600 when described spring is fully wound already.Then described spring can be discharged when manipulation dish.The various mechanisms for discharging described spring can be adopted.Power shaft 1100 rotation in opposite direction is likely to trigger the release of described spring.But, it is generally desirable to power shaft 1100 can rotate along any direction.It addition, the magnetic switch keeping spring in place can be discharged by the signal of the motor control of control handwheel.
In embodiments discussed so far, when the coil of solenoid 200 is energized, clutch 600 can be disengaged.But, other parts any of solenoid 200 and power supply 50 are designed such that to make clutch 600 engage when described coil is de-energized.
Fig. 4 represents that clutch 600 engages gear 510 by plane 700.Plane 700 can be a part for an embodiment of engagement device.But, clutch 600 can be designed to joint gear 510 in many ways.Figure 4 and 5 represent an embodiment, and wherein, clutch 600 and gear 510 are mechanically connected.Other machinery can be adopted, such as the cushion between pressing clutch 600 and gear 510.Other scheme, clutch 600 and plane 700 can be designed to make them to contact with each other.Such as, clutch 600 can be designed to hydraulic pressure or magnetic force composition plane 700 or gear 510.Clutch 600 can be designed to its rotation when power shaft 400 rotates.
In one embodiment, power shaft 1100 and power shaft 400 are designed to rotate along both direction.Other scheme, power shaft 400 can be designed to rotate along both direction, but, it is possible to there is engagement, in order to power shaft 1100 can only rotate in one direction.This purpose can be realized, in order to power shaft 400 motion in any direction can be transferred to power shaft 1100 or other scheme so that only power shaft 400 athletic meeting in one direction causes the motion of power shaft 1100.
In another embodiment, the control handwheel of power shaft 400 and valve acutator, as control handwheel 1 connects, or it is connected with the parts handled by described control handwheel.In the described embodiment, only when described control handwheel is operated, power shaft 400 just rotates.In some cases, control handwheel still can hand-turning, even if electric energy still can be used for rotating motor.In this case, it is possible to without wishing to the electromotor 1000 starting power supply 50.Therefore, described coil can be de-energized, in order to the rotation of power shaft 400 can also rotate gear 510.Described coil can be energized with various ways well known in the art.In one embodiment, described coil receives from for motor, the electric energy of circuit as identical in the motor 4 of valve acutator.Therefore, powering if stopping the control device for described motor, solenoid 200 will power-off.Clutch 600 will engage gear 510, and described control handwheel is rotated, then will starter-generator 1000.
Furthermore it is possible to include switch, in order to even if operator enable to electromotor 1000 when still can for motor work.For example, it is possible to include switch, it can be opened for the circuit of described coil power supply, and clutch 600 engages gear 510, and, any rotation of power shaft 400 all can cause the rotation of electromotor 1000.
In another embodiment, when described valve acutator works, power shaft 400 just rotates.But, whether the no matter described coil electricity of the work of electromotor 1000 still can control.Therefore, only when described valve acutator when there is no electricity input as manual, when hydraulic pressure or pneumatic operation work, electromotor 1000 just rotates.
Energy storage device (not shown) can also be arranged on installing plate 100, and be connected with electromotor 1000.Described energy storage device can be any apparatus for storing electrical energy previously discussed or well known in the art.
Electronic installation 900 can also be arranged on installing plate 100.Electronic installation 900 can be used for conversion, reverses, and adjusts, conversion, purifies and/or controls the electric energy carried by electromotor 1000.Electronic installation 900 can form electrical connection between electromotor 1000 and energy storage device.Other scheme, electronic installation 900 can receive the electric energy from described energy storage device.Such as, if electromotor 1000 is alternating current generator, then transducer can be used for converting alternating current to unidirectional current to store.Electronic installation 900 is the embodiment that electrical power regulates device.Described electric energy adjustment device and apparatus for storing electrical energy can be realized by same device.
The various versions of each of power supply 50 and all parts broadly fall into the scope of the present invention.Shown power supply 50 is installed on installing plate 100.Electromotor 1000, other parts of solenoid 200 and power supply 50 can with any suitable being arranged on installing plate 100 well known in the art.Installing plate 100 can be made with various materials, for instance, metal or semiconductor wafer.Shown installing plate 100 has plane.But, installing plate 10 can have any structure, and it can connect the different parts of power supply 50.Term " parts " refers to solenoid 200, lever 300, clutch 600, described gear and little gear and electromotor 1000 when being used for representing power supply 50.Term " parts " is also represented by implementing any device of the function of each parts described.
It addition, in a particular embodiment, it is possible to do not include installing plate 100.Such as, electromotor 1000 may be mounted in a part for valve acutator, and solenoid 200 and clutch 600 may be mounted in the other parts of described valve acutator.Other scheme, electromotor 1000, clutch 600 and the function implemented by solenoid 200 can be fully integrated on a single assembly.
The parts of power supply 50 can be made with multiple material.Such as, lever 300 and clutch 600 can use such as metal, and the material of plastics or resin is made.Installing plate 100 can also be made with circuit board material or other material any compatible with described function.
Power shaft 400 shown in figs. 3-5 is connected with power shaft 1100 by machinery.In the embodiment shown by Fig. 3-5, described speed adjusting device includes the machinery comprising gear or being made up of it.But, other mechanism, as pulley or train can also be used for connecting said two axle.Other scheme, power shaft 400 can pass through hydraulic way and be connected with power shaft 1100, as by hydraulic pump and pipeline.It addition, power shaft 400 can couple with power shaft 1100 fluid.Additionally, if the speed of power shaft 400 need not be improved, so power shaft 400 and power shaft 1100 just can directly couple each other, such as, in one embodiment, the function wherein implemented with clutch 600 by solenoid 200 is all integrated on the single assembly together with electromotor 1000.
Contain a lot of detail although described above, but these details should not be construed as limiting the scope of the present invention, and be considered only as providing some typical embodiment.Similarly, under the premise without departing from the spirit and scope of the present invention, it is possible to visualize other embodiments of the invention.Therefore, the scope of the present invention is only by appended claims and their legal equivalents, rather than limited by description above.Belong to the implication of the present invention and the supplement to the invention disclosed herein of scope, delete and change broadly falls into the scope of the present invention.
Claims (8)
1., for a power supply for valve acutator, described power supply includes:
TRT, described TRT includes the electromotor being suitable for the powering auxiliary electronics to described valve acutator；With
Being suitable for mechanical energy from the drive train of described valve acutator to the input equipment of described TRT, described mechanical energy produces by utilizing manual manipulation mechanism to carry out the described power train of valve acutator described in manual manipulation.
2. power supply as claimed in claim 1, wherein, it also includes:
It is suitable for the engagement device described input equipment and described TRT being operatively coupled；With
It is suitable for controlling the control device when described input equipment and described TRT are operatively coupled by described engagement device.
3. power supply as claimed in claim 2, wherein, described control device is realized by identical device with described engagement device.
4. power supply as claimed in claim 2, wherein, described control device, described engagement device is realized by identical device with described TRT.
5. power supply as claimed in claim 1, wherein, its speed adjusting device also including being suitable for the speed of the speed described TRT of raising of relatively described input equipment.
6. power supply as claimed in claim 1, wherein, it also includes the apparatus for storing electrical energy being suitable for receiving electric energy from described TRT.
7. power supply as claimed in claim 1, wherein, its PCU Power Conditioning Unit also including being suitable for changing the electricity output of described TRT.
8. power supply as claimed in claim 1, wherein, described input equipment is suitable for the mechanical energy that the described drive train from described valve acutator is produced by the control handwheel of valve acutator described in manual manipulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260693.3A CN103352810B (en) | 2006-03-07 | 2006-03-07 | Generate electricity for valve acutator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310260693.3A CN103352810B (en) | 2006-03-07 | 2006-03-07 | Generate electricity for valve acutator |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800545153A Division CN101438056B (en) | 2006-03-07 | 2006-03-07 | Electrification of valve actuator |
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| CN103352810A CN103352810A (en) | 2013-10-16 |
| CN103352810B true CN103352810B (en) | 2016-07-06 |
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| CN111307235B (en) * | 2020-03-25 | 2021-10-08 | 厚力德机器（杭州）有限公司 | Automatic pulse flow statistical system for vacuum sewage collection |
| CN117856455B (en) * | 2024-03-07 | 2024-05-10 | 太原理工大学 | Intelligent regulation and control method for power equipment based on fuzzy control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4524283A (en) * | 1982-06-18 | 1985-06-18 | Innovex Oy | Energy converter |
| US5427350A (en) * | 1994-05-31 | 1995-06-27 | Rinkewich; Isaac | Electrically-operated control valve and water distribution system including same |
| CA2237420A1 (en) * | 1997-05-14 | 1998-11-14 | Ethicon Endo-Surgery, Inc. | Improved electrosurgical hemostatic method and device including an anvil |
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2006
- 2006-03-07 CN CN201310260693.3A patent/CN103352810B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4524283A (en) * | 1982-06-18 | 1985-06-18 | Innovex Oy | Energy converter |
| US5427350A (en) * | 1994-05-31 | 1995-06-27 | Rinkewich; Isaac | Electrically-operated control valve and water distribution system including same |
| CA2237420A1 (en) * | 1997-05-14 | 1998-11-14 | Ethicon Endo-Surgery, Inc. | Improved electrosurgical hemostatic method and device including an anvil |
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