CN101517244B - Valve device having a soft start function - Google Patents
Valve device having a soft start function Download PDFInfo
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- CN101517244B CN101517244B CN2007800358024A CN200780035802A CN101517244B CN 101517244 B CN101517244 B CN 101517244B CN 2007800358024 A CN2007800358024 A CN 2007800358024A CN 200780035802 A CN200780035802 A CN 200780035802A CN 101517244 B CN101517244 B CN 101517244B
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- valve
- soft start
- main valve
- control valve
- preset
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- 239000012530 fluid Substances 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims description 20
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- 230000005611 electricity Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
- F15B11/068—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with valves for gradually putting pneumatic systems under pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
- F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/67—Methods for controlling pilot pressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
- Details Of Valves (AREA)
Abstract
The invention provides a valve device (6) having a soft start valve (21). The soft start valve (21) has a main valve which can be switched between a basic position, a soft start position and a working position. A pilot control valve which supplies a fluid pilot control signal is responsible for switching over into the soft start position and into the working position. Said fluid pilot control signal is switched directly to the main valve (24) for switching over into the soft start position and additionally indirectly via a switchover valve (26) for switching over into the working position, the operating state of which switchover valve (26) is determined by the secondary pressure which prevails in a secondary channel (2).
Description
The present invention relates to a kind of control valve unit, it has soft start function (Softstartfunktion), just such function, that is, and second side make gradually but not unexpected pressure forms (Druckaufbau) becomes possibility.
From the file DE 91 05 458 U1 such control valve unit of cicada, this control valve unit has the soft start valve of being made up of several independent valves.The block valve (Absperrventil) that is configured to the two-position valve was inserted in being connected between first passage (Primaerkanal) and the second channel (Sekundaerkanal); This first passage is connected with pressure source; This second channel is connected with load to be supplied; And, can block this connection (initial position) selectively or allow this connection (working position).To the regular hour section of conversion after the operation of preset valve (Vorsteuerventil) of working position, be caused, this preset valve is inserted on the soft start passage of walking around main valve, and this soft start passage has the throttling device in addition.In addition, through the arm of soft start passage, second pressure (Sekundaerdruck) that is present in the second channel arrives main valve as insert (aufschalten) at acting pilot pressure on the direction of working position.
Begin from the activation of preset valve, second channel is provided with the pressure medium from first passage through the soft start passage with the mode of throttling.Correspondingly, pressure raises in second channel gradually.When second pressure reached predetermined level, main valve was transformed into the working position, so that subsequently, this second channel is supplied through the bigger flow section of main valve, finally reaches the level of first pressure (Primaerdruck) up to second pressure.
In known control valve unit; The of short duration pressure that in second channel, for example causes owing to pressure surge descends and possibly cause following consequence; That is, make main valve be transformed into initial position and therefore the system that makes in a period of time, be in again in the pattern of soft start.This can cause serious disabler, because the load that is connected temporarily can not be provided with necessary Fluid Volume.In addition, be the bigger flow that guarantees perhaps in the soft start stage, just to be required, then need large-sized relatively preset valve, all these have all caused the bigger size of soft start valve.
Soft starter device known from file DE 20 2,004 015 468 U1 is constructed by similar mode.Block valve can be through second pressure that has formed gradually be transformed into the working position of opening from intercepted initial position.The pressure of second side forms through being inserted into throttling arrangement on the soft start passage of (umgebenden) this block valve given.Manipulation when device extends two control valve units in addition on (Kanalverlauf) through being inserted into passage is activated, and through these two valves, also makes the venting (Entlueftung) of soft starter device become possibility.
File US 5,669,422 discloses a kind of soft start valve, and it has the main valve that can between three positions, change.Conversion from initial position to the soft start position is caused by the preset valve.Conversion from the soft start position to the working position is caused by second pressure that little by little forms, and this second pressure just affacts on the main valve from the soft start position constantly.
Task of the present invention is to provide a kind of control valve unit, and it has the soft start function that can work reliably and still keep compact structure.
This task utilization has such control valve unit and realizes that this control valve unit comprises the soft start valve, and this soft start valve comprises:
- the main valve that can between initial position, soft start position and operating position, change; This main valve separates second channel and the first passage that transmission is in the pressure medium under first pressure at initial position; And this main valve makes second channel be connected with first passage via the soft start passage that comprises the throttling device in the soft start position; And; This main valve getting around in the operating position (unterUmgehungderDrosselmittel) under the situation of throttling device make between second channel and the first passage be connected open
-be provided for influencing the preset valve of the operating position (Schaltstellungen) of main valve; In the operation of this preset valve, produce fluid preset signal; This fluid preset signal is applied to first of main valve and handles on the surface (Betaetigungsflaeche); So that main valve is converted to the soft start position from initial position
-can through be present in the second channel second pressure and by the changing valve that handled; This changing valve will be linked on the second manipulation surface of main valve, so that main valve is transformed into the working position from the soft start position by the fluid preset signal that the preset valve produces under the predeterminated level of second pressure.
The main valve of soft start valve is constructed with the form of three position valve (Dreistellungsventil) thus at least, and except initial position and working position, this three position valve also can have the soft start position of being responsible for the soft start stage.Although soft start fluid stream is directed into from the preset valve and passes and walk around main valve in the prior art, yet based on the present invention, this fluid stream passes main valve and and need not the direct control through the preset valve.The preset valve of preferably being handled with the mode of electricity is responsible for main valve with additional changing valve cooperation different actions position.The fluid preset signal that is produced by the preset valve is transformed into the soft start position with main valve.If second pressure reaches required switching threshold after the certain hour interval; Then it causes such manipulation of changing valve; That is, fluid preset signal is linked into another handles on the surface, ensure the more working position of high flow rate so that main valve is transformed into from the soft start position.
Changing valve be preferably can fluid mode handle (fluidisch betaetigbar), wherein, second pressure can directly be linked on this changing valve as pilot pressure.At this, the changing valve for example mode of pressing force balance comes work.Alternatively; Through adopt can electricity the changing valve (switching signal of this changing valve produces under the assistance of pressure transducer that second pressure is detected or pressure switch) that activates of mode, then the activation second pressure, that be merely indirection type of passing through of changing valve also is possible.The latter makes especially simple change of switching threshold become possibility.
Because second pressure directly self does not affact on the main valve as handling pressure, then produced decoupling zero (Entkopplung) with preset signal (it provides conversion power for main valve).Thus, such interconnection (Verschaltung) is feasible, in this interconnection, during being in the working position, does not influence the operating position of main valve in first passage and/or the pressure surge that in second channel, occurs.This makes the operation that continues smoothly become possibility, is switched off until the preset valve.
Provide in other improvement project dependent claims of the present invention.
Main valve designs aptly as follows, that is, main valve causes release (Entlastung) of the pressure in the second channel at its initial position, in aerodynamic applications then for causing the venting of second channel.Pass the feasible venting that need not to use independent bleed valve or pass the preset valve of releasing of main valve.
The throttling device of the speed that the pressure of decision in the second channel forms preferably be designed to aspect its throttling intensity adjustable.For example, the throttling device can comprise with adjustable mode and screws in the throttling bolt in the valve casing.
Main valve, preset valve and changing valve are preferably formed the structural group component (Baugruppe) that forms this soft start valve.Can simplify the operation in the installation and removal process like this.
The preset valve especially is a solenoid valve.Yet, also can adopt the valve that activates of mode that other can electricity, for example piezo electric valve or static valve.
Suitable is to handle the surface towards identical direction for two of main valve.At this, conversion from initial position to the soft start position and the conversion from the soft start position to the working position are undertaken by identical converting motion direction, and it is preferably linear forms.
Main valve preferably has operating position for given main valve and can be positioned on the main valve member in the operating position of respective numbers, and it especially is the form of guiding valve (Ventilschieber).In order to change, first and second handle the surface interacts with mode and the main valve member that drives respectively.
Although being responsible for to the second manipulation surface of the conversion of working position preferably unchangeably, (ortsfest) arranges on the main valve member; Yet, be responsible for preferably being arranged on and the main valve member actuating element place of independent (separaten) mutually to the first manipulation surface of the conversion of soft start position.This actuating element can be thrown off with main valve member as follows, that is, make the latter under not having the situation of carrying of actuating element, to be transformed in the working position.Just, although conversion from initial position to the soft start position two handle surfaces and preferably move jointly,, to the conversion of working position, the first manipulation surface stays and second handles the surface this first handles the surface away from (entfernt).
The basis of the above movement process of mentioning is preferably the stop surface (Anschlagflaeche) in the adjustment stroke that is arranged in actuating element, and this stop surface defines the soft start position.
Actuating element preferably is configured to the form of application piston (Betaetigungskolben).Yet alternatively, it also is feasible being embodied as the manipulation diaphragm.
Suitable is, main valve member through mechanical return spring device and biased (vorspannen) in initial position.After being transformed into the soft start position, the return spring device is compressed with certain amount, and wherein, compression degree also can further increase until reaching the working position.In the de-excitation (Deaktivierung) of preset valve afterwards, the return spring device makes main valve member be reset to initial position.
Preferably directly through realizing handling surperficial loading to first with preset pressure by the preset passage (Vorsteuerkanal) of preset valve control.Handle surperficial loading to second and preferably produce through the ALT-CH alternate channel that goes out from preset passage top set, in the extension of this ALT-CH alternate channel, be inserted with changing valve, this changing valve can block or open this ALT-CH alternate channel.
Changing valve preferably includes movably changing valve member.Changing valve is based on second pressure and by control and manipulation.(like needs time) through second pressure directly loading can for example take place by means of deriving passage (Abgriffskanal); This derivation passage links to second channel, or links to the channel part (Kanalast) of the soft start passage that between second channel and throttling device, extends.
Control valve unit can only be made up of the soft start valve.The soft start valve can be used as independent valve operation, and can be for example as the insertion valve (Einschaltventil) in the so-called attending device that is used for preparation pressurized air.
In a kind of especially favourable design proposal; Except the soft start valve; Control valve unit also comprises the fluid distributor (Fluidverteiler) that carries this soft start valve; This fluid distributor is equipped with a plurality of control valves in addition, and these control valves are from the distributor supply passage (Verteiler-Speisekanal) of fluid distributor and jointly be provided with pressure medium.At this, the soft start valve is installed by this way, that is, make its second channel be communicated with the distributor supply passage, and can in the distributor supply passage, carry out controlled pressure formation thus.At this, first passage can be connected with the distributor service duct (Verteiler-Versorgungskanal) of the outer surface that passes to (ausmuendenden) this fluid distributor, can set up the connection of the pressure source that first pressure is provided through it.Yet, also have other possibility, that is, pressure source directly links to the corresponding remittance mouthful (Ausmuendung) of the first passage at soft start valve place and locates.
Below will be described further the present invention with reference to accompanying drawing.Wherein:
Fig. 1 in the perspective view of preferred form of implementation, shown be equipped with the soft start valve according to control valve unit of the present invention,
Fig. 2 has shown the control valve unit that comes from Fig. 1 in the scope of soft start valve in the cross section of II-II intercepting along the line, wherein, main valve is shown as in occupation of initial position.
Fig. 3 has shown the view that is similar to Fig. 2, and wherein main valve is shown as in occupation of the soft start position, and
Fig. 4 has shown the view that is similar to Fig. 2, and wherein main valve is shown as in occupation of the working position.
For the purpose of clear, in Fig. 2 to Fig. 4, the passage that in the soft start valve, extends is only partly as dotted line or continuous lines and draw.At this, continuous lines representes to be in the passage under the pressure.
Can find out in the drawings, to be labeled as 6 valve device design on the whole be valve group (Ventilbatterie); That this valve group comprises is all-in-one-piece, or be preferably the fluid distributor 7 of modular type, and fluid distributor 7 is equipped with a plurality of control valves 8 of being handled of mode that can electricity.
8 of control valves are contained on the equipment surface (Bestueckungsflaeche); This equipment surface is hidden by control valve 8 in the drawings; The passage that in fluid distributor 7, extends passes to these equipment surfaces, and these passages are connected with the passage (further not illustrating) of control valve 8 in known manner.
The passage that in fluid distributor 7, extends comprises the distributor supply passage 12 that stretches along fluid distributor 7 and two the first parallel with it distributor leakage paths and the second distributor leakage path 13,14.These passages 12,13,14 in the zone on the equipment mentioned surface with control valve 8 in each becomes the fluid connection.Under situation about moving with pressurized air, distributor leakage path 13 and 14 is bleed passage (Entlueftungskanaele).
Stretch out the first and second distributor service aisles (Verteiler-Arbeitskanaele) 15 that penetrated fluid distributor 7 from each equipment position; 16; Load not shown further can link on it, and this load is the driver for treating to move by means of fluid force for example.Distributor service aisle 15 and 16 fluid load given by 8 of control valves, and this control valve 8 can be controlled through the electrical signal transmitting set 17 that only schematically shows, in fluid distributor 7, extend.
Except control valve 8, fluid distributor 7 also is equipped with at least one soft start valve 21.The preferred construction of soft start valve 21 especially can be found out from Fig. 2 to Fig. 4.Suitable is that soft start valve 21 preferably is seated in 18 places, equipment surface outside the fluid distributor 7 with separable mode.Yet direct integrated in fluid distributor 7 also is feasible.
The equipment surface 18 that is used for soft start valve 21 is adjacent with a series of adjacent equipment surface that is used for control valve 8 aptly, especially is positioned on the same plane.
On the equipment surface that is used for soft start valve 21 18, have similarly the group in the aperture of the passage that extends at fluid distributor 7, just as being used for the equipment surface that kind of control valve 8.Thus, equipment surface 18 can be used for equipping with soft start valve 21 or with at least one control valve 8 selectively.If desired, can connect into ABAP Adapter in the centre.
Under the situation of equipping with soft start valve 21, this distributor service aisle 15 works as distributor service duct 22, and the required pressure medium of the operation of control valve unit can be supplied to from the outside through this distributor service duct 22.Distributor service duct 22 ends at and equips the place, (entgegengesetzt) side of surface 18 opposition, and supply opening 23 is positioned at being convenient on the approaching outer surface of fluid distributor 7.Can connect fluid circuit at these supply opening 23 places by means of suitable fastening means, it is set up to the connection of the pressure source that said pressure medium is provided.The pressure medium of being supplied be in by pressure source or be connected to thereafter pressure regulator under the given pressure, this pressure is at following first pressure that is called.
In the corresponding design proposal of soft start valve 21, another distributor service aisle 16 also can be alternatively or additionally as distributor service duct 22.
By means of 21 on soft start valve can, when the entry into service of control valve unit 6, (it provides supply to control valve 8) causes that pressure gradually, mild forms in distributor supply passage 12.Distributor supply passage 12 is not that directly the outer surface from fluid distributor 7 is supplied to pressure medium through connecting opening in a conventional manner, but passes soft start valve 21 and be supplied to pressure medium from distributor service duct 22.
(it is for example by arranging that with the mode that has axial spacing each other a plurality of ring-shaped sealing element is formed through the air locking 35 in valve member accommodating part 32, arranged with the mode fixing with respect to housing; These ring-shaped sealing elements surround main valve member 33 coaxially); Can valve member accommodating part 32 be divided into several axially in succession segment section (Abchnitten) 36a, 36b, 36c; From this segment section 36a, stretch out the valve passage that penetrated valve chest 28 among 36b and the 36c respectively.These valve passages comprise the first passage 1 that is communicated with distributor service duct 22, the second channel 2 that is communicated with distributor supply passage 12, and the soft start passage 3 that in valve chest 28, is connected with second channel 2.Realize with being connected of distributor service duct 22 and distributor supply passage 12 through following mode; Promptly; First passage 1 and second channel 2 are arranged in the installation surface (Installationsflaeche) 37 at valve chest 28 places with passing to the outside; Utilize this installation surface 37, soft start valve 21 can be placed on the equipment surface 18.Passage aperture on installation surface 37 distributes by this way, that is, make them align with the passage aperture of distributor passage with the mode of pairing correctly.
The section 36a of first portion that is communicated with first passage 1 of valve member accommodating part 32 is axially between second portion section 36b that is communicated with second channel 2 and the third part section 36c that is communicated with soft start passage 3.
Be positioned at segment section 36a, the length segment section (Laengenabschnitt) of the main valve member 33 in 36b and the 36c has formed the control device segmentation 42 of cooperating mutually with air locking 35.This control device segmentation 42 is ladder-type on its longitudinal direction, and comprise alternately arrange, have big or than the zone of minor diameter.According to have larger-diameter zone or have zone than minor diameter be arranged to seal element in one be in identical axial height, it is separated from one another or be connected to each other with the mode of fluid then axially to be arranged in the segment section of valve member accommodating part 32 of both sides of corresponding seal element respectively.
The drive portion segmentation 43 of main valve member 33 links to control device segmentation 42 on the side of third part section 36c.Return spring device 44 is bonded on this drive portion segmentation 43 places, and this return spring device 44 is in bias voltage main valve member 33 on the direction of initial position as shown in Figure 3.
Be accompanied by the execution of its converting motion 34, main valve member 33 can be positioned initial position as shown in Figure 2 selectively, soft start position as shown in Figure 3, or in the working position as shown in Figure 4.The difference to each other of these positions is through valve passage 1,2,3 different interconnection (through control device segmentation 42).
In the initial position in being presented at Fig. 2, second channel 2 separates with adjacent first passage 1 mutually.As the distributor service duct 22 with first passage 1 connection is the same constantly, first passage 1 transmission is in the pressure medium under first pressure.
If second channel 2 is connected with the leakage path 4 of main valve 33 in initial position, then is favourable.If use pressurized air as pressure medium, (just as situation in an embodiment), then leakage path 4 passes to the bleed passage of the outer surface of valve chest 28 with formation, and this bleed passage place also can be linked with baffler 45.
Suitable is that leakage path 4 passes to the distolateral place of valve chest 28 on the coaxial extension of valve member accommodating part 32.Alternatively or additionally, can also make leakage path 4 lead to installation surface 37 as follows, that is, it is communicated with one of them distributor leakage path 13 or 14, and through that add or the unique pressure releasing of fluid distributor 7.
First passage 1 also separates with soft start passage 3 at initial position mutually.
In the soft start position, second channel 2 only is connected with first passage 1 through soft start passage 3 (and thus also just through throttling device 38).This be connected first and third part section 36a and 36c between by open.Not not existing direct connection the under the situation between first passage 1 and second channel 2, that walking around soft start passage 3.In addition, second channel 2 is also separated with leakage path 4.
At last; In the working position that in Fig. 4, shows; Walking around throttling device 38 and therefore walking around under the situation of soft start passage 3, first passage 1 exists with the direct first and second segment section 36a and the 36b that is connected through two valve member directly connected to one another accommodating parts 32 between the second channel 2.Yet, the connection through soft start passage 3 additionally is held as parallel connection, just the same as in an embodiment situation.With compare through soft start passage 3, can between first passage 1 and second channel 2, realize higher fluid flow through direct connection.
In the working position, leakage path 4 continues to separate with all other valve passages.
What belong to main valve 24 is first (46) and second (47) the manipulation surface, and they interact with mode and the main valve member 33 that drives respectively.
First handles surface 46 is positioned on the actuating element 48; This actuating element 48 is independently for main valve member 33; And exemplarily be configured to the form of application piston, and the axially then drive portion segmentation 43 of main valve member 33 and being housed inside in the valve member accommodating part 32.The first manipulation surface 46 is oriented and axially deviates from main valve member 33, in the drawings for left.
Actuating element 48 is placed on the direction of the longitudinal axis 31 of main valve member 33 in the accommodating chamber 52 (its end portion segmentation by valve member accommodating part 32 forms) slippingly.Actuating element 48 is in sealing with the perimeter wall of accommodating chamber 52 and contacts under (Dichtkontakt).The end face of accommodating chamber 52 be formed for actuating element 48 towards first stop surface 53 of main valve member 33 and second stop surface 54 of opposed orientation, they define the adjustment stroke of actuating element 48.
As substituting of application piston, actuating element 48 also can for example be implemented as the manipulation diaphragm.
Second is arranged in main valve member 33 places with handling surperficial 47 axial restraints.Therefore, it participates in each linear motion of main valve member 33.Second handles surface 47 and first handles surface 46 towards identical direction,, under current situation, deviates from control section section 42 that is.
Second handles the end face towards actuating element 48 that surface 47 preferably is positioned at main valve member 33.Be exactly this situation in an embodiment.
When main valve member 33 shifted linearly, main valve member 33 can it have the end portion segmentation on the second manipulation surface 47 and get into (Fig. 2) in the accommodating chamber 52.In addition; Main valve member 33 can occupy the position shown in Fig. 3 and Fig. 4; In these positions, main valve member 33 fully shifts out from accommodating chamber 52, and; Its end sections section with second manipulation surface 47 is arranged in the then length segment section 55 of accommodating chamber 52 of valve member accommodating part 32, and the cross section of this valve member accommodating part 32 is less than the cross section of accommodating chamber 52.Correspondingly, second handle surface 47 aptly less than the first manipulation surface 46.
As long as main valve member 33 protrudes in the accommodating chamber 52, then the power transmission on the direction that is oriented in converting motion 34 between main valve member 33 and the actuating element 48 is possible.Yet these two parts only hover ground can be transmitted so that only push the adjustment power (drueckende Stellkraefte) of form against each other.This provides this possibility for main valve member 33 on the other hand, that is, from actuating element 48 disengagements and away from this actuating element 48, wherein, two distances of handling between the surface 46,47 also change simultaneously.
In all cases, main valve member 33 has towards actuating element 48 and especially by the formed loaded surfaces 56 of the end face of main valve member 33, this loaded surfaces 56 can mechanically be loaded through actuating element 48.
The return spring device of more than mentioning 44 regionally is handled between surface 46,47 and (on the other hand) this control device segmentation 42 (on the one hand) two and is placed in the drive portion segmentation 43 of main valve member 33.
In order to simplify the assembling of return spring device 44, main valve member 33 is embodied as multi-part type.Main valve member 33 preferably its end portion segmentation place towards actuating element 48 have cover that install, that especially press-fit up, be preferably canular top 57; Return spring device 44 can be supported on this 57 places, top, and this top 57 is supported in the length segment section 55 in valve member accommodating part 32 under by the continuing of the annular seal 58 that it carried slippingly.Top 57 can have second and handle at least a portion of surperficial 47.
Actuating element 48 is divided into first with accommodating chamber 52 to be handled chamber 62 and second and handles chamber 63, the first and handle chambers 62 and be positioned at a side opposite with main valve member 33, and the second manipulation chamber 63 is positioned at the side towards main valve member 33.With actuating element 48 relatively, first handles chamber 62 is limited 53 of first stop surfaces.Axially with actuating element 48 opposite positions, second handles chamber 63 has by second stop surface, 54 formed rigidity confining walls, and has by main valve member 33 and second handle the surface 47 formed confining walls that can axially move in other words.Through main valve member 33 corresponding positions, therefore second handles chamber 63 can extend into a segment distance in the length segment section 55, just as from visible Fig. 4.
Divide the fluid preset passage 64 of expenditure to import the first manipulation chamber 62 from the second portion section 36b (it is connected with first passage 1) of valve member accommodating part 32 at the other end.Preset valve 65 is inserted in the extension of this preset passage 64, so that preset passage 64 is divided into preset supply passage 64a that is communicated with first passage 1 and the preset service aisle 64b that is communicated with the first manipulation chamber 62.
Preset valve 25 especially is 3/2 selector valve, and this selector valve can make preset service aisle 64b or be connected with preset supply passage 64a, perhaps is connected with the preset bleed passage 65 of releasing that is used for the pressure aspect.Preset bleed passage 65 can directly pass to through the housing of preset valve 25 in the atmosphere, just as the situation among the embodiment.Yet, can also exit through the distributor bleed passage that in fluid distributor 7, extends.
Changing valve 6 comprises preferably can be linearly, along the direction of double-head arrow 66 and mobile changing valve member 67.Be preferably mechanical spring assembly 68 and produce elastic force, through this elastic force, changing valve member 67 is biased on the direction of the initial position (Ausgangsstellung) shown in Fig. 2 and Fig. 3.Cling on the fixing stop surface 72 of relative housing and given this initial position through changing valve member 67.As substituting of mechanical spring assembly 68, can also adopt gas spring device, especially air spring assembly.
Changing valve member 67 axially defines control chamber 73 together with the housing section segmentation that surrounds changing valve member 67, and this control chamber 73 is connected with second channel 2 through the derivation passage 74 that penetrated soft start valve 21 constantly.This connection can directly form, and perhaps realizes through the connection to the channel part of the soft start passage 3 of extension between throttling device 38 and second channel 2 of deriving passage 74.
Thus, in control chamber 73, have the second current pressure constantly.It applies the conversion power Fu opposite with the spring force of spring assembly 68 on changing valve member 67.
Changing valve 26 can be to controlling through the fluid transit of ALT-CH alternate channel 75, and through this ALT-CH alternate channel 75, preset service aisle 64b and second handles chamber 63 and is connected, and in the initial position of changing valve member 67, this connection is disconnected.If changing valve member 67 is transferred to the dislocation (Umschaltstellung) that shows among Fig. 4 through enough conversion power Fu, then the fluid transit through ALT-CH alternate channel 75 is allowed to.
The control valve unit 6 typical methods of operation are described below.
Suppose 25 de-excitations of preset valve, and main valve member 33 is in initial position.Second channel 2 (and therefore, connected distributor supply passage 12) does not have pressure thus.Through supplying with opening 23, the pressure medium that is under first pressure is supplied to, and this pressure medium is present among the preset supply passage 64a equally.Handling chamber 62 and 63 for two exits through preset valve 25.This original state is presented among Fig. 2.
In order to connect (Einschalten) control valve unit 6, preset valve 25 passes through the electric control signal that is provided and is handled.Preset valve 25 is opened the path (Durchgang) that passes preset passage 64, and feasible fluid preset signal corresponding to first pressure is fed in the first manipulation chamber 62 and handles surface 46 to first and loads.Actuating element 48 is transferred until clinging to second stop surface, 54 places through consequent adjustment power, and wherein, actuating element 48 drives main valve member 33 under the situation of the spring force that overcomes return spring device 44.Handle surperficially 54 the time when actuating element 48 arrives second, main valve member 33 is in the soft start position that can find out from Fig. 3.
So far still handling chamber 63 in occupation of the changing valve member 67 of initial position in this maintenance second separates with preset passage 64.
Along with the beginning to the conversion of soft start position, the soft start stage of certain time also begins.It is characterized in that, pressure medium through open soft start passage 3, flow into second channel 2 with flow, so that second pressure that is present in wherein raises gradually through throttling.The gradient that this pressure rises can be come change through regulating throttling device 38.
Through deriving passage 74, the second current pressure also is present in the control chamber 73 of changing valve 26.Along with the continuous rising of second pressure, conversion power Fu also correspondingly increases, but as long as do not reach by spring assembly 68 defined threshold values, then this point does not tell on.
When reaching this threshold value, the soft start stage will stop.It is enough big that change power Fu this moment; So that the dislocation that changing valve member 67 is transferred among Fig. 4 to be shown; This is feasible, and fluid preset signal will likewise be present in second through the ALT-CH alternate channel of having opened this moment 75 to be handled in the chamber 63, and therefore inevitable also being present on the second manipulation surface 47.Consequently, main valve member 33 further shifts up to the working position that gets into as shown in Figure 4, and wherein, actuating element 48 rests on original position.Because the cross section of length segment section 55 is less than the cross section of this first manipulation chamber 62, so effect poor effectively (Differenzkraft) on actuating element 48, it keeps this actuating element 48 to abut in second stop surface, 54 places.
Pass to the conversion of working position, second channel 2 is provided with pressure medium through the big through flow cross section of being opened by main valve member 33, so that second pressure reaches the level of first pressure in the short period of time.
In an embodiment, the pressure that is present in the second channel 2 directly is linked on the changing valve 26 as the pilot pressure of conversion power is provided.Yet, alternatively also have this possibility, that is, with changing valve 26 be designed to can electricity mode handle, wherein, electromotive signal produces under the assistance of pressure transducer that second pressure is detected or pressure switch.
For being back to initial position, only need preset valve 25 cuts out, so that preset service aisle 64b is deflated.Then, return spring device 44 shifts back initial position with main valve member 33.
A kind of advantage of described valve arrangement is the immunity of soft start valve to the pressure surge in first passage 1 or the second channel 2.Even make changing valve 26 be transformed into the degree of initial position owing to pressure reduction causing conversion power Fu is reduced to, it keeps being closed and can not overflowing because be arranged in the preset fluid of the second manipulation chamber 63 to the working position did not influence of main valve member 33.
Therefore, control valve unit 6 not only can gas medium but also can have been moved by liquid medium.Preferably can use pressurized air.
Claims (23)
1. control valve unit that has soft start function, it has soft start valve (21), and said soft start valve (21) comprising:
-the main valve (24) that can between initial position, soft start position and working position, change; At said initial position; Said main valve separates second channel (2) and the first passage (1) that transmission is in the pressure medium under first pressure, and in said soft start position, said main valve makes said second channel (2) be connected with said first passage (1) via the soft start passage (3) that comprises throttling device (38); And; In said working position, said main valve being connected between open said second channel (2) under the situation that gets around said throttling device (38) and first passage (1)
-be provided for influencing the preset valve (25) of the operating position of said main valve (24); In the operation of this preset valve, produce and be applied to the fluid preset signal that first of said main valve (24) is handled on the surface (46); So that make said main valve (24) be transformed into said soft start position from said initial position
-can through be present in the said second channel (2) second pressure and by the changing valve (26) that handled; Said changing valve (26) will be linked into by the fluid preset signal that said preset valve (25) produces on the second manipulation surface (47) of said main valve (24), so that said main valve (24) is transformed into said working position from said soft start position under the predeterminated level of said second pressure.
2. control valve unit according to claim 1 is characterized in that, said second channel (2) is connected with leakage path (4) in the said initial position of said main valve (24).
3. control valve unit according to claim 1 and 2 is characterized in that, said throttling device (38) is configured to can regulate aspect its throttling intensity.
4. control valve unit according to claim 1 and 2 is characterized in that, said main valve (24), said preset valve (25) and said changing valve (26) are formed the structural group component.
5. control valve unit according to claim 1 and 2 is characterized in that, said preset valve (25) is a solenoid valve.
6. control valve unit according to claim 1 and 2 is characterized in that, handles surface (46,47) towards identical direction for said two.
7. control valve unit according to claim 1 and 2; It is characterized in that; Said three operating positions of said main valve (24) are through movably the operating position of main valve member (33) is and given accordingly, and wherein, said first and said second handles surface (46; 47) form respectively, so that interact with mode and the said main valve member (33) that drives.
8. control valve unit according to claim 7; It is characterized in that; Said first handle surface (46) be formed at said main valve member (33) mutually independently actuating element (48) locate; Said actuating element (48) can carry to be transferred until the stop surface (54) that abuts in given said soft start position under the situation of said main valve member (33) by fluid preset signal loading the time and locate; Wherein, continue to move when getting into said working position through the fluid loading on the said second manipulation surface (47) subsequently in said main valve member (33), said main valve member (33) is left said actuating element (48).
9. control valve unit according to claim 8; It is characterized in that; Said actuating element (48) but be arranged to axially the then main valve member (33) of sliding linearly, and the mode that is allowed to the transmission of the adjustment power that only pushes form and hover ground abut in said main valve member (33) and locate.
10. according to Claim 8 or 9 described control valve units, it is characterized in that said actuating element (48) is configured to piston-like.
11. control valve unit according to claim 7 is characterized in that, the said second manipulation surface (47) is fixedly placed on said main valve member (33) and locates.
12. according to Claim 8 or 9 described control valve units; It is characterized in that; The said second manipulation surface (47) is fixedly placed on said main valve member (33) and locates; And when said soft start position was transformed into said working position, said second handles surface (47) handled surface (46) away from said first at said main valve (24).
13. control valve unit according to claim 7 is characterized in that said main valve member (33) is biased into the return spring device (44) of said initial position.
14. control valve unit according to claim 13; It is characterized in that; Said return spring device (44) axially exists---on the one hand---to be handled surface (46,47) and---is arranged in coaxially on the said main valve member (33) between the control device segmentation (42) of the given said operating position of said main valve member (33) on the other hand---for said two.
15. control valve unit according to claim 7; It is characterized in that; Said first handles surface (46) defines the first manipulation chamber (62), and said first handles chamber (62) is communicated with the preset passage (64) that said fluid preset signal is provided and controlled by said preset valve (25).
16. control valve unit according to claim 7; It is characterized in that; Said second handles surface (47) defines the second manipulation chamber (63), and said second handles chamber (63) is communicated with ALT-CH alternate channel (75), and this ALT-CH alternate channel (75) is communicated with the preset passage (64) that said fluid preset signal is provided and controlled by said preset valve (25); And, in the extension of said ALT-CH alternate channel (75), be inserted with said changing valve (26).
17. control valve unit according to claim 1 and 2; It is characterized in that; Said changing valve (26) has the changing valve member (67) that is biased into initial position by spring force; And changing valve member (67) is loaded with the mode opposite with said spring force by conversion power, and said conversion power depends on said second pressure that is present in the said second channel (2).
18. control valve unit according to claim 17; It is characterized in that said changing valve member (67) control is through the fluid transit of ALT-CH alternate channel (75), this ALT-CH alternate channel (75) is at one end loaded by the said fluid preset signal of said preset valve; Handle surface (47) and lead to said second at the other end; And be with following mode, that is, make fluid transit blocked in the initial position of said changing valve member (67); And when said changing valve member (67) was transformed into dislocation owing to second pressure of predeterminated level is reached, said fluid transit was allowed to.
19. control valve unit according to claim 17 is characterized in that, said spring force is provided by mechanical spring assembly (68).
20. control valve unit according to claim 17 is characterized in that, be present in the said second channel (2) said second pressure directly, self is as being used to produce the pilot pressure of said conversion power and being linked into said changing valve (26).
21. control valve unit according to claim 1 and 2; It is characterized in that being equipped with the fluid distributor (7) of a plurality of control valves (8), said fluid distributor (7) contains distributor supply passage (12) and at least one distributor leakage path (13,14); It becomes fluid to be communicated with respectively with said control valve (8); And said fluid distributor (7) is equipped with said soft start valve (21), wherein; Said second channel (2) is connected with said distributor supply passage (12), and said first passage (1) is connected with the distributor service duct (22) of the outer surface that passes to said fluid distributor (7).
22. control valve unit according to claim 21; It is characterized in that; Said fluid distributor (7) has a plurality of equipments surface; Extend two distributor service aisles (15,16) that pass said fluid distributor (7) respectively from each equipment surface, and said equipment surface can be equipped with control valve (8) or soft start valve (21) aptly at least in part selectively; Wherein, at least one distributor service aisle (15)---is equipped with on the associated equipment surface under the situation of soft start valve (21)---and can be used as distributor service duct (22).
23. control valve unit according to claim 19 is characterized in that, said mechanical spring assembly (68) is being adjustable aspect its spring force.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006046450A DE102006046450B3 (en) | 2006-09-29 | 2006-09-29 | Valve arrangement, has shifting valve operatable by secondary pressure dominant in secondary channel and applying fluid pressure pilot signal of operating surface of main valve with predetermined level of secondary pressure |
| DE102006046450.8 | 2006-09-29 | ||
| PCT/EP2007/006832 WO2008040411A1 (en) | 2006-09-29 | 2007-08-02 | Valve device having a soft start function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101517244A CN101517244A (en) | 2009-08-26 |
| CN101517244B true CN101517244B (en) | 2012-06-27 |
Family
ID=38698434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800358024A Expired - Fee Related CN101517244B (en) | 2006-09-29 | 2007-08-02 | Valve device having a soft start function |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2047109B1 (en) |
| CN (1) | CN101517244B (en) |
| AT (1) | ATE450715T1 (en) |
| DE (2) | DE102006046450B3 (en) |
| WO (1) | WO2008040411A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5337788A (en) * | 1993-10-22 | 1994-08-16 | Robertshaw Controls Company | Pneumatic valve with slow start and quick exhaust |
| CN1093231A (en) * | 1993-04-08 | 1994-10-12 | 陈锦权 | Novel quick-frozen fresh fruits goods and preparation method thereof |
| US5669422A (en) * | 1995-04-07 | 1997-09-23 | Ckd Corporation | Slow start valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9105458U1 (en) * | 1991-04-29 | 1991-06-13 | Mannesmann AG, 4000 Düsseldorf | Valve unit for dampened switching of a main pressure medium path |
| AU1080297A (en) * | 1995-11-13 | 1997-06-05 | Wilkerson Corporation | Slow start supply and exhaust valve |
| DE202004015468U1 (en) * | 2004-10-06 | 2005-01-05 | Festo Ag & Co.Kg | Soft start device for compressed air systems |
-
2006
- 2006-09-29 DE DE102006046450A patent/DE102006046450B3/en not_active Expired - Fee Related
-
2007
- 2007-08-02 AT AT07801493T patent/ATE450715T1/en active
- 2007-08-02 WO PCT/EP2007/006832 patent/WO2008040411A1/en active Application Filing
- 2007-08-02 EP EP07801493A patent/EP2047109B1/en not_active Not-in-force
- 2007-08-02 CN CN2007800358024A patent/CN101517244B/en not_active Expired - Fee Related
- 2007-08-02 DE DE502007002215T patent/DE502007002215D1/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093231A (en) * | 1993-04-08 | 1994-10-12 | 陈锦权 | Novel quick-frozen fresh fruits goods and preparation method thereof |
| US5337788A (en) * | 1993-10-22 | 1994-08-16 | Robertshaw Controls Company | Pneumatic valve with slow start and quick exhaust |
| US5669422A (en) * | 1995-04-07 | 1997-09-23 | Ckd Corporation | Slow start valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101517244A (en) | 2009-08-26 |
| ATE450715T1 (en) | 2009-12-15 |
| DE102006046450B3 (en) | 2008-03-27 |
| EP2047109A1 (en) | 2009-04-15 |
| DE502007002215D1 (en) | 2010-01-14 |
| WO2008040411A1 (en) | 2008-04-10 |
| EP2047109B1 (en) | 2009-12-02 |
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