CN102678647A - Direction control valve - Google Patents
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- CN102678647A CN102678647A CN2012101765270A CN201210176527A CN102678647A CN 102678647 A CN102678647 A CN 102678647A CN 2012101765270 A CN2012101765270 A CN 2012101765270A CN 201210176527 A CN201210176527 A CN 201210176527A CN 102678647 A CN102678647 A CN 102678647A
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Abstract
The invention relates to a direction control valve, comprising a valve body (2),a valve rod (3) matched with the valve body (2) and at least two oil ports formed on the valve body (2). When the valve rod (3) moves to each working position of a reversing valve, mutually communicated oil ports in the at least two oil ports are mutually communicated through at least two internal through-flow oil ducts. The direction control valve provided by the invention is very suitable for realizing reversing control on high-flow hydraulic oil, and the reversing valve ensures that under the condition that the diameter of the valve rod is not changed, the flow capacity of the reversing valve can be significantly enhanced, therefore, the rated flow of the reversing valve can be increased in a condition that the processing difficulty is not significantly increased, that is, the flow capacity of a hydraulic valve can be multiplied without increasing the diameter of the valve rod of the hydraulic valve. Therefore, high-flow direction valves can be produced and processed by utilizing existing processing equipment and technology, and the production cost is reduced.
Description
Technical field
The present invention relates to hydraulic control valve, particularly, relate to a kind of position control valve.
Background technique
Along with the development of hydraulics, high-pressure high-flow is an important directions of hydraulic pressure industry development always.In recent years, along with the tonnage of engineering machinery is increasing, also increasingly high to the rated flow requirement of hydrovalve.Generally, in order to improve the rated flow of hydrovalve, can be through increasing the diameter of valve rod, realize with the method for the cross-sectional flow area that increases hydrovalve.But the diameter dimension of valve rod is big more, and is high more to the requirement of process equipment precision, and the diameter of valve rod is big more, and it is big more that valve rod moves required steering force, and navigability can be just poor more.So in order to improve the rated flow of hydrovalve, the diameter dimension that increases valve rod simply is irrational.
Below be the concrete structure that example is described the position control valve of existing technology referring to Fig. 1 to Fig. 4 with the hyraulic controlled type three position four-way directional control valve.
Referring to Fig. 1, during the equal no electric circuit of the pilot solenoid valve at two ends 1, valve rod 3 is in meta, and the oil inlet P and the first actuator port A, the second actuator port B all are in cut-off state, and the first actuator port A, the second actuator port B and oil return inlet T also are in cut-off state simultaneously.
Referring to Fig. 2; When the pilot solenoid valve 1 in left side was switched on, guide's hydraulic control oil promoted valve rod 3 and is in right position, and oil inlet P is communicated with the first actuator port A; The second actuator port B is communicated with oil return inlet T; At this moment the hydraulic oil of oil inlet P can flow out through the first actuator port A, thereby to the hydraulic actuator fuel feeding, the oil return of hydraulic actuator can get into oil return inlet T through the second actuator port B.
Referring to Fig. 3; When the pilot solenoid valve 1 on right side was switched on, guide's hydraulic control oil promoted valve rod 3 and is in position, a left side, and oil inlet P is communicated with the second actuator port B; The first actuator port A is communicated with oil return inlet T; At this moment the hydraulic oil of oil inlet P can flow out through the second actuator port B, thereby to the hydraulic actuator fuel feeding, the oil return of hydraulic actuator can get into oil return inlet T through the first actuator port A.
Referring to Fig. 4; For the position control valve of this existing technology; Behind the position control valve of the selected a certain model of hydraulic system, (those skilled in the art are also referred to as " spool " to the valve rod of this position control valve, because position control valve is mainly the guiding valve type; Be commonly referred to as that " valve rod ") is confirmed; Correspondingly the big footpath D2 of valve rod path D1 and valve rod is (wherein each valve rod section of cooperating of the big footpath of valve rod Duan Weiyu valve seal, valve rod path section mainly is each valve rod section that when valve rod moves, forms through-flow oil duct, mainly is formed in each circular groove on the valve rod outer circumferential face) who confirms.When valve rod 3 was in the state of opening fully, when for example the valve rod in Fig. 23 was in right, the cross section product moment of valve rod big footpath section and valve rod path section had determined the size of the cross-sectional flow area of position control valve; This has also just determined the through-current capability of position control valve; Want further to improve the cross-sectional flow area of the through-current capability of valve, will increase the difference of big footpath D2 of valve rod and valve rod path D1, realize that this purpose has two kinds of methods with regard to needs raising position control valve; First kind is to continue to reduce valve rod path D1; But valve rod path D1 can not infinitely reduce, and valve rod path D1 crosses the bulk strength that the young pathbreaker influences valve rod 3; Second kind is to increase the big footpath D2 of valve rod, and this is the main method that adopts in the existing technology, and still, the excessive requirement to process equipment of the big footpath D2 of valve rod will improve greatly, increase difficulty of processing greatly.This shows; The big footpath D2 of simple increase valve rod or it all is worthless reducing valve rod path D1 simply; But not through these two kinds of methods again can't the augment direction control valve through-current capability; This has constituted a great technical barrier in position control valve field, and those skilled in the art are also always habitual when addressing the above problem adopts above-mentioned two kinds of methods and do not go to consider the possibility of others, thus the application of seriously having limited position control valve.
In view of this, need a kind of position control valve that overcomes or alleviate the problems referred to above of existing technology of design.
Summary of the invention
Technical problem to be solved by this invention provides a kind of position control valve; This position control valve can be under the situation of maintaining valve shank diameter size constancy; Significantly strengthen the through-current capability of position control valve, thereby can under the situation that does not significantly increase difficulty of processing, increase the rated flow of position control valve.
In order to solve the problems of the technologies described above; The present invention provides a kind of position control valve; Comprise valve body, the valve rod that cooperates with this valve body, be formed at least two hydraulic fluid ports on the said valve body; Wherein, when said valve rod moves to each working position of said position control valve, be interconnected through at least two through-flow oil ducts in inside separately between the hydraulic fluid port that is interconnected in said at least two hydraulic fluid ports.
Preferably; Each said hydraulic fluid port is communicated with two or many inner oil ducts that are formed in the said valve body respectively; Be formed with a plurality of circular grooves on the said valve rod; When said valve rod moved to each working position of said position control valve, the corresponding hydraulic fluid port in said at least two hydraulic fluid ports formed the through-flow oil duct in said at least two inside through corresponding said inner oil duct and the corresponding said circular groove on the said valve rod that is communicated with separately, thereby realized being interconnected.
Specifically selectively, said at least two hydraulic fluid ports comprise filler opening, return opening, first actuator port and second actuator port.
Preferably; The said inner oil duct that forms in the said valve body comprises first to the 3rd oil-feed oil duct that is communicated with said filler opening, first actuator port, first oil duct that is communicated with said first actuator port and first actuator port, second oil duct, second actuator port, first oil duct that is communicated with said second actuator port and second actuator port, second oil duct and the first to fourth oil return oil duct that is communicated with said return opening, and the circular groove on the said valve rod comprises first to fourth circular groove that forms at interval successively.
Particularly; Said working position comprises first working position and second working position; When said valve rod moves to said first working position; Be communicated with through the first and second inner through-flow oil ducts between said filler opening and said first actuator port, and be communicated with through the third and fourth inner through-flow oil duct between said return opening and said second actuator port; When said valve rod moves to said second working position; Be communicated with through the 5th and the 6th inner through-flow oil duct between said filler opening and said second actuator port, and be communicated with through the 7th and the 8th inner through-flow oil duct between said return opening and said first actuator port.
More specifically; When said valve rod moves to said first working position; The said first inner through-flow oil duct comprises the said first oil-feed oil duct, first circular groove and first actuator port, first oil duct that is communicated with successively; The said second inner through-flow oil duct comprises the said second oil-feed oil duct, second circular groove and first actuator port, second oil duct that is communicated with successively; The said the 3rd inner through-flow oil duct comprises said second actuator port, first oil duct, the 3rd circular groove and the 3rd oil return oil duct that is communicated with successively, and the said the 4th inner through-flow oil duct comprises second actuator port, second oil duct, the 4th circular groove and the 4th oil return oil duct that is communicated with successively.
More specifically; When said valve rod moves to said second working position; The said the 5th inner through-flow oil duct comprises the said second oil-feed oil duct, the 3rd circular groove and second actuator port, first oil duct that is communicated with successively; The said the 6th inner through-flow oil duct comprises said the 3rd oil-feed oil duct, the 4th circular groove and second actuator port, second oil duct that is communicated with successively; The said the 7th inner through-flow oil duct comprises said first actuator port, first oil duct, first circular groove and the first oil return oil duct that is communicated with successively, and the said the 8th inner through-flow oil duct comprises said first actuator port, second oil duct, second circular groove and the second oil return oil duct that is communicated with successively.
Selectively, said position control valve is the hyraulic controlled type selector valve, and the liquid controling cavity at the two ends of this hyraulic controlled type selector valve is connected with the pilot solenoid valve that is used to control the corresponding said liquid controling cavity of hydraulic control oil turnover respectively.
Selectively; When said valve rod moves to said first working position or second working position, pass through three and the above through-flow oil duct connection in inside between the hydraulic fluid port that is interconnected in said filler opening, return opening, first actuator port and second actuator port separately.
Particularly; Said valve rod and valve body cooperate in the arbitrary working position moving process of said valve rod in each working position of said position control valve, be used for being communicated with in this working position said at least two hydraulic fluid ports corresponding hydraulic fluid port the through-flow oil duct in said at least two inside open simultaneously.
Preferably; Said valve rod and valve body cooperate in the arbitrary working position moving process of said valve rod in each working position of said position control valve, and the through-flow oil duct in said at least two inside that is used for being communicated with in this working position the corresponding hydraulic fluid port of said at least two hydraulic fluid ports is opened successively.
Pass through technique scheme; Position control valve of the present invention is highly suitable for realizing the switching-over control to high-volume hydraulic oil; This position control valve can significantly strengthen the through-current capability of position control valve under the situation of maintaining valve shank diameter size constancy, thereby can under the situation that does not significantly increase difficulty of processing, increase the rated flow of position control valve; That is to say; Its diameter that need not to increase the hydrovalve valve rod just can be at double the through-current capability of increase hydrovalve, thereby can utilize existing process equipment and technology just can realize the production and processing of big direction of the traffic valve, reduced cost of production.And; Under the certain situation of required through-current capability, position control valve of the present invention can reduce the radial dimension of valve rod and through increasing the quantity of inner through-flow oil duct, realize required through-current capability; Thereby can reduce the size of position control valve, make that the structure of position control valve is compact more.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Attached drawings is used to provide further understanding of the present invention, and constitutes the part of specification, and it is used to explain the present invention with following embodiment, but protection scope of the present invention is not limited to following accompanying drawing and embodiment.In the accompanying drawings:
Fig. 1 has wherein taked to analyse and observe display format to the agent structure of valve body for the structural representation of position control valve when valve rod is in meta of existing technology;
Fig. 2 has wherein taked to analyse and observe display format to the agent structure of valve body for position control valve shown in Figure 1 structural representation when valve rod is in right position;
Fig. 3 has wherein taked to analyse and observe display format to the agent structure of valve body for position control valve shown in Figure 1 structural representation when valve rod is in position, a left side;
Fig. 4 is the local enlarged diagram of the through-flow oil duct that forms of position control valve shown in Figure 1 valve rod and valve body when filler opening is communicated with first actuator port;
Fig. 5 has wherein taked to analyse and observe display format to the agent structure of valve body for the structural representation of position control valve when valve rod is in meta of the specific embodiment of the invention;
Fig. 6 has wherein taked to analyse and observe display format to the agent structure of valve body for position control valve shown in Figure 5 structural representation when valve rod is in right position;
Fig. 7 has wherein taked to analyse and observe display format to the agent structure of valve body for position control valve shown in Figure 5 structural representation when valve rod is in position, a left side;
Fig. 8 is the local enlarged diagram of the through-flow oil duct that forms of position control valve shown in Figure 5 valve rod and valve body when filler opening is communicated with first actuator port.
Description of reference numerals:
1 pilot solenoid valve; 2 valve bodies;
3 valve rods; 4 first circular grooves;
5 second circular grooves; 6 the 3rd circular grooves;
7 the 4th circular grooves; The P filler opening;
The P1 first oil-feed oil duct; P2, the second oil-feed oil duct;
P3 the 3rd oil-feed oil duct; The T return opening;
A first actuator port; A1 first actuator port first oil duct;
A2 first actuator port second oil duct; B second actuator port;
B1 second actuator port first oil duct; B2 second actuator port second oil duct;
D1 valve rod path; The big footpath of D2 valve rod.
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention, should be understood that, embodiment described herein only is used for explanation and explains the present invention, and protection scope of the present invention is not limited to following embodiment.
Before describing embodiment of the present invention; Need predeclaredly be, the first, the major technique design of position control valve of the present invention can be suitable for polytype position control valve; For example hyraulic controlled type selector valve, electric-controlled type selector valve etc.; And also be not limited to and be applied to specific selector valve such as for example 3-position 4-way, two-position three way etc., any position control valve is as long as it adopts technical conceive of the present invention, and it all should be worked as and belong to protection scope of the present invention; Second; Position control valve of the present invention can be applied in various types of hydraulic pressure commutation loop to realize the switching-over of hydraulic circuit; For example be used for oil hydraulic cylinder switching-over control loop, hydraulic motor controlled loop etc., the concrete oil hydraulic circuit of using of position control valve of the present invention should not constitute the restriction to protection domain of the present invention; The 3rd; Position control valve of the present invention belongs to hydraulic element, and its substantive technical characteristics is its hydraulic communication relation and control relation, and does not lie in concrete oil duct shape, structure etc.; Those skilled in the art are in technical conceive scope of the present invention; Can design the inside oil duct of countless versions valve body structure and concrete shape, as long as but having adopted hydraulic pressure relation of the present invention, it all should be worked as and belong to protection scope of the present invention; The 4th, in following explanation, be clear description some technical terms that technological scheme of the present invention adopted; For example " valve rod path ", " the big footpath of valve rod " etc. are comparatively speaking, and as stated, it has the implication that those skilled in the art know usually; The general big footpath of valve rod section is used for forming sealing with valve body and cooperates; Also can be called the valve stem seal section, and valve rod path section is generally the circular groove that is formed on the valve rod, is mainly used at valve rod and moves into place the through-flow oil duct of back formation.
Following is that example is described embodiment of the present invention with the hyraulic controlled type three position four-way directional control valve mainly with reference to Fig. 5 to Fig. 8; Wherein, This hyraulic controlled type three position four-way directional control valve adopts the break-make of two pilot solenoid valves, 1 control hydraulic control oil; Make hydraulic control oil be fed to valve rod left end or right-hand member through controlling corresponding pilot solenoid valve 1, to promote the valve rod mobile position.Pilot solenoid valve 1 generally can adopt two-position three way magnetic valve, and with the oil-feed and the oil return of the liquid controling cavity of realizing valve rod 3 two ends, the conventional means that the relevant hydraulic control of adopting pilot solenoid valve to realize selector valve belongs to pilot operated directional control valve repeats no more at this.
Extremely shown in Figure 8 referring to Fig. 5; The selector valve of the embodiment shown in the figure is a three position four-way directional control valve; This three position four-way directional control valve comprises valve body 2, the valve rod 3 that cooperates with this valve body 2, is formed on four hydraulic fluid ports on the said valve body 2; The i.e. first actuator port A, the second actuator port B, oil inlet P and oil return inlet T; Wherein, when said valve rod 3 moves to each working position (i.e. position, a left side or right position) of said selector valve, be interconnected through at least two through-flow oil ducts in inside respectively between the hydraulic fluid port that is interconnected in the said first actuator port A, the second actuator port B, oil inlet P and the oil return inlet T.Specifically describe the connectivity structure of the through-flow oil duct in corresponding inside below with reference to Fig. 5 to Fig. 8.
Referring to shown in Figure 5; When the pilot solenoid valve 1 of both sides all during no electric circuit; Valve rod 3 is in meta, and the oil inlet P and the first actuator port A, the second actuator port B are in cut-off state, and the first actuator port A, the second actuator port B and oil return inlet T also are in cut-off state.
Referring to Fig. 6; When 1 energising of the pilot solenoid valve in left side, the hydraulic control oil that the liquid controling cavity of valve rod 3 left ends gets into promotes valve rod 3 and is in right position, and a part of hydraulic oil is from the oil inlet P first oil-feed oil duct P1 that flows through; Through first actuator port, the first oil duct A1; Arrive the first actuator port A, another part hydraulic oil can be from the oil inlet P second oil-feed oil duct P2 that flows through, through first actuator port, the second oil duct A2; Also get into the first actuator port A at last; Thereby the hydraulic oil of oil inlet P can converge the back through the outside fuel feeding of the first actuator port A at first actuator port, gets into hydraulic actuator, and the oil return of hydraulic actuator can get into oil return inlet T through the second actuator port B; A part of hydraulic oil of the second actuator port B gets into oil return inlet T from the second actuator port B, second actuator port, the first oil duct B1 that flows through, and another part hydraulic oil gets into oil return inlet T from the second actuator port B, second actuator port, the second oil duct B2 that flows through.
Referring to Fig. 7; When 1 energising of the pilot solenoid valve on right side, the liquid controling cavity that hydraulic control oil gets into valve rod 3 right sides promotes valve rod 3 and is in position, a left side, and a part of hydraulic oil is from the oil inlet P second oil-feed oil duct P2 that flows through; Through second actuator port, the first oil duct B1; Get into the second actuator port B, another part hydraulic oil can be from oil inlet P the 3rd oil-feed oil duct P3 that flows through, through second actuator port, the second oil duct B2; Also get into the second actuator port B at last; At this moment the fluid of oil inlet P can pass through the second actuator port B fuel feeding, gets into hydraulic actuator, and the oil return of hydraulic actuator can get into oil return inlet T through the first actuator port A; Part fluid gets into oil return inlet T from the first actuator port A, first actuator port, the first oil duct A1 that flows through, and another part fluid gets into oil return inlet T from the first actuator port A, first actuator port, the second oil duct A2 that flows through.
Referring to Fig. 8; For the valve rod of confirming 3; The big footpath D2 of valve rod path D1 and valve rod confirms that when valve rod 3 was in the state of opening fully, the cross section product moment of valve rod big footpath section and valve rod path section had determined the cross-sectional flow area size of selector valve; This has also just determined the through-current capability of position control valve; Under the prerequisite that does not change the big footpath D2 of valve rod path D1 and valve rod, the present invention has further improved the through-current capability of position control valve through the method that increases through-flow oil duct quantity, for example with respect to Fig. 1 to the position control valve of existing technology shown in Figure 4; The present invention will become two passes from a passage originally corresponding to the inside oil duct of each actuator port; So just make the through-current capability of position control valve increase by one times basically, thereby increased the through-current capability of position control valve significantly, increased the rated flow of position control valve.
Can find out by last description; The key technical feature of above-mentioned embodiment of the present invention is that (for example above-mentioned first actuator port, the first oil duct A1 and the second oil-feed oil duct P1 are via the through-flow oil duct of valve rod 3 formation through increasing the corresponding through-flow oil duct of corresponding work hydraulic fluid port when valve rod 3 moves to corresponding working position in the present invention; The through-flow oil duct that first actuator port, the second oil duct A2 and the second oil-feed oil duct P2 form via valve rod 3; The through-flow oil duct that second actuator port, the first oil duct B1 and the second oil-feed oil duct P2 form via valve rod 3; And the through-flow oil duct that forms via valve rod 3 of second actuator port, the second oil duct B2 and the 3rd oil-feed oil duct P3 etc.) quantity increases the through-current capability of position control valve; Apparently; Control the connection of at least two oil-feeds and oil return oil duct owing to the through-flow oil duct employing of each actuator port valve rod 3 in the same working position of position control valve or close this moment; Therefore corresponding valve rod 3 should form the structure that cooperatively interacts with valve body 2, with realize above-mentioned with reference to Fig. 4 to through-flow relation shown in Figure 8.
It should be noted that valve rod 3 and valve body 2 to those skilled in the art can detail structure miscellaneous to realize above-mentioned through-flow relation, for example; The selector valve of above-mentioned embodiment is formed for five valve stem seal sections (corresponding to the big footpath D1 of valve rod, the i.e. big footpath of valve rod section) of valve body 2 sealing on valve rod 3 and is used for four through-flow circular grooves (i.e. first to fourth circular groove 4,5; 6; 7, corresponding to valve rod path D2, i.e. valve rod path section); First to fourth circular groove 4 wherein; 5,6,7 are formed on the valve rod 3 successively; Correspondingly on valve rod 3, also just form five the big footpath of valve rod sections; In above-mentioned Fig. 4 to Fig. 8, when valve rod 3 moves to first working position (being the right position among Fig. 6), at this first working position, first actuator port A fuel feeding; The second actuator port B oil return; First actuator port, the first oil duct A1 and the first oil-feed oil duct P1 form through-flow oil duct via first circular groove 4 on the valve rod 3 (promptly being formed by the corresponding valve rod path section on the valve rod 3), and this first actuator port first oil duct A1 and the first oil-feed oil duct P1 end (generally forming sealing through corresponding valve rod big footpath section on the valve rod 3 and valve body 2) through valve rod 3 and the sealing and the oil return inlet T of valve body 2 simultaneously, and first actuator port, the second oil duct A2 and the second oil-feed oil duct P2 are via the through-flow oil duct of second circular groove, 5 formation on the valve rod 3; First actuator port, the second oil duct A2 and the second oil-feed oil duct P2 end through valve rod 3 and the sealing and the oil return inlet T of valve body 2 simultaneously; And on this first working position, the second actuator port B oil return, this moment, second actuator port, the first oil duct B1 was communicated with oil return inlet T through the 3rd circular groove 6 on the valve rod 3; Second actuator port, the second oil duct B2 is communicated with oil return inlet T through the 4th circular groove 7 on the valve rod 3, and second actuator port, the first oil duct B1, second actuator port, the second oil duct B2 and oil return inlet T are all ended through valve rod 3 and the sealing and the oil inlet P of valve body 2 at this moment.
And when valve rod 3 moves to second working position (being the position, a left side among Fig. 7); In this second working position, first actuator port A oil return; The second actuator port B fuel feeding; First actuator port, the first oil duct A1 is communicated with oil return inlet T via first circular groove 4 on the valve rod 3; This first actuator port first oil duct A1, oil return inlet T are ended (forming sealing through corresponding valve rod big footpath section on the valve rod 3 and valve body 2) through the sealing and the first oil-feed oil duct P1 of valve rod 3 and valve body 2 simultaneously; Promptly with the oil inlet P remain off, first actuator port, the second oil duct A2 is communicated with oil return inlet T via second circular groove 5 on the valve rod 3, and this first actuator port second oil duct A2, oil return inlet T are ended through the sealing and the second oil-feed oil duct P2 of valve rod 3 with valve body 2 simultaneously; Promptly with the oil inlet P remain off; And on this second working position, the first actuator port B fuel feeding, this moment, second actuator port, the first oil duct B1 was communicated with through the 3rd circular groove 6 on the valve rod 3 with the second oil-feed oil duct P2; Second actuator port, the second work oil duct B2 is communicated with through the 4th circular groove 7 on the valve rod 3 with the 3rd oil-feed oil duct P3, and second actuator port, the first oil duct B1, the second oil-feed oil duct P2, second actuator port, the second oil duct B2 and the 3rd oil-feed oil duct all end through valve rod 3 and the sealing and the oil return inlet T of valve body 2 at this moment.
What this need stress once more be; Although shown the cooperating structure form of Fig. 5 for illustrative purposes to valve rod shown in Figure 83 and valve body 2; But to those skilled in the art apparently; The inside oil duct on the valve body 3 and the specific constructive form of valve rod are not limited to the specified structure shown in Fig. 5 to Fig. 8, but can have various distortion, for example; Second circular groove 5 on the above-mentioned valve rod 3 can simple deformation be the rightmost side that is formed on valve rod 3, and corresponding first actuator port, the second oil duct A2 and the second oil-feed oil duct P2 also are formed into the position that adapts with this second circular groove 5 in valve body 2.For another example; During the external fuel feeding of the above-mentioned first actuator port A or the second actuator port B; The second oil-feed oil duct P2 be respectively applied for through second circular groove 5 on the valve rod 3 to first actuator port, the second oil duct A2 or through the 3rd circular groove 6 on the valve rod 3 to second actuator port, the first oil duct B1 fuel feeding; That is to say that the second oil-feed oil duct P2 is the shared oil-feed oil duct of first actuator port, second oil duct A2 and second actuator port, the first oil duct B1, but obviously is not limited to this to those skilled in the art; More generally, first actuator port, second oil duct A2 and second actuator port, the first oil duct B1 can have the oil-feed oil duct with its corresponding special separately.In a word; The inside oil duct in the structural type of relevant valve rod 3, the valve body 2 and the distressed structure of oil pocket are numerous; Should protection scope of the present invention be confined to the concrete stem structure form or the specific constructive form of the inside oil duct in the valve body, essential technical conceive of the present invention is to concern via the internal communication between the formed hydraulic fluid port of corresponding inner oil duct (for example filler opening and actuator port) through the slip of valve rod.In addition; In above-mentioned Fig. 5 to Fig. 8, first actuator port, the first oil duct A1, first actuator port, the second oil duct A2, second actuator port, the first oil duct B1, second actuator port, the second oil duct B2 pass through first to fourth circular groove 4,5 respectively when valve rod 3 moves to corresponding working position; 6; 7 are communicated with oil return inlet T, it should be noted that shown in Fig. 5 to Fig. 8 only to be the sign form of simplifying; In fact oil return inlet T also is an independent hydraulic fluid port on the valve body 2; Although Fig. 5 to Fig. 8 has marked out four oil return inlet T, in fact these four oil return inlet T have represented four drainback passages (being that the interior oil road junction that from left to right marks T among Fig. 5 is followed successively by first to fourth oil return oil duct) that are communicated with oil return inlet T, and and be meant and have four oil return inlet T.
In above-mentioned embodiment; Preferably; Said valve rod 3 cooperates for from meta the actuator port first oil duct A1 that wins in turn being communicated with at valve rod 3 respectively with the second oil-feed oil duct P2 with the first oil-feed oil duct P1 and first actuator port, the second oil duct A2 with valve body 2; And second actuator port, first oil duct B1 and second actuator port, the second oil duct B2 in turn are communicated with respectively with oil return inlet T; When move second working position, make second actuator port, the first oil duct B1 and the second oil-feed oil duct P2 and second actuator port, the second oil duct B2 in turn be communicated with respectively at valve rod 3 from meta, and first actuator port, the first oil duct A1 and first actuator port, the second oil duct A2 in turn are communicated with respectively with oil return inlet T with the 3rd oil-feed oil duct P3.Commutation ability in the time of can improving position control valve of the present invention switching-over like this; Can prevent effectively that position control valve from causing the unexpected increase of hydraulic fluid flow rate or reduce when opening suddenly or cutting out, thereby weaken the impact that when opening or closing whole hydraulic system is brought.
But; Protection scope of the present invention is not limited to above-mentioned embodiment; For example, the first, in above-mentioned embodiment for convenience; Adopt of the motion of pilot solenoid valve 1 control hydraulic control oil with control valve rod 3; But a kind of method that this just controls valve rod 3 motions does not constitute the restriction to protection domain of the present invention, and the stem movement of position control valve of the present invention can adopt the control type of various known position control valves such as manual control, automatically controlled control (for example proportion electro-magnet), motor-driven control;
For another example; In technique scheme; Position control valve of the present invention adopts two parallel through-flow oil ducts in inside to increase the through-current capability of position control valve at (and between oil return inlet T and first and second actuator port B) between oil inlet P and the first and second actuator port A, the B when fuel feeding (and oil return); But two parallel through-flow oil ducts in inside should not regarded limitation of the present invention as, and parallel three perhaps the structural type of the through-flow oil duct in more a plurality of inside also should be within protection scope of the present invention.Under this situation; Similar with above-mentioned embodiment; Said valve rod 3 can cooperate for when move the oil-feed working position of corresponding work hydraulic fluid port, make the corresponding through-flow oil duct in a plurality of inside of this actuator port open simultaneously with the hydraulic oil with oil inlet P at valve rod 3 with valve body 2 and is fed to this actuator port through the through-flow oil duct in a plurality of inside, and certain said valve rod 3 also can cooperate for when move the fuel feeding working position of corresponding work hydraulic fluid port, make the corresponding through-flow oil duct in a plurality of inside of this actuator port open successively with the hydraulic oil with oil inlet P at valve rod 3 with valve body 2 and is fed to this actuator port successively through the through-flow oil duct in a plurality of inside; Correspondingly; Valve rod 3 can cooperate for when move the oil return working position of corresponding work hydraulic fluid port, make the corresponding through-flow oil duct in a plurality of inside of this actuator port be communicated with simultaneously with oil return inlet T at valve rod 3 with valve body 2; Certain said valve rod 3 also can cooperate for when move the oil return working position of corresponding work hydraulic fluid port, make the corresponding through-flow oil duct in a plurality of inside of this actuator port in turn be communicated with oil return inlet T at valve rod 3 with valve body 2; That is to say; Said valve rod 3 can cooperate in the arbitrary working position moving process of said valve rod 3 in each working position of said position control valve with valve body 2; The through-flow oil duct at least two inside that is used between the corresponding hydraulic fluid port of this arbitrary each hydraulic fluid port of working position connection is opened simultaneously; Preferably; Said valve rod 3 also can cooperate in the arbitrary working position moving process of said valve rod 3 in each working position of said position control valve with valve body 2, and the through-flow oil duct at least two inside that is used between the corresponding hydraulic fluid port of this arbitrary each hydraulic fluid port of working position connection is opened successively.As stated; Under the situation of opening and closing successively; Commutation ability in the time of can improving position control valve of the present invention switching-over; Can prevent effectively that position control valve from causing the unexpected increase of hydraulic fluid flow rate or reduce when opening suddenly or cutting out, thereby weaken the impact that when opening or closing whole hydraulic system is brought.
In addition; Need to prove; Because the actuator port of position control valve generally need be born function and the oil return function that receives hydraulic actuator to the hydraulic actuator fuel feeding in the different working position, so the through-current capability of position control valve makes supply capability and oil return ability mate each other, that is to say; If arbitrary actuator port is communicated with oil inlet P through at least two through-flow oil ducts in inside during external fuel feeding in the fuel feeding working position; If this actuator port is also born the oil return function, then when valve rod 3 moved to the oil return working position of this actuator port correspondence, this actuator port also should be communicated with oil return inlet T through the through-flow oil duct in inside of equal number; The supply capability of position control valve and oil return ability are only mutual coupling like this, thereby can strengthen the through-current capability of position control valve.
It should be noted that especially that in above-mentioned embodiment said position control valve only is to be that example is described with the three position four-way directional control valve; But technical conceive of the present invention goes for various types of position control valves; For example two position three way directional control valve, 3-position-3-way selector valve etc. the most especially, for example can be bi-bit bi-pass selector valve (being equivalent to a switch valve) at position control valve of the present invention; On said position control valve under this situation, only there are two hydraulic fluid ports; One is actuator port, and the function that another hydraulic fluid port is born in hydraulic system according to this position control valve can be used as oil inlet P, also can be used as oil return inlet T; But even so, this bi-bit bi-pass selector valve can be used above-mentioned technical conceive of the present invention too.In addition; For the one-way valve in the position control valve; Thereby, its forward hydraulic fluid port realizes unidirectional conducting although could promoting stem movement in the time of need possessing certain oil pressure; But through suitably designing the structure of valve rod and valve body, it also can be suitable for above-mentioned technical conceive of the present invention and reach the purpose that strengthens through-current capability.
Can find out through foregoing description; Technical conceive of the present invention is not limited only to Fig. 5 to concrete structure situation shown in Figure 8; But can be suitable for the improvement of polytype position control valve widely, thus can be under the situation of maintaining valve shank diameter size constancy, the rated flow of increase position control valve basically at double; With under existing processing conditions, realization is applicable to the manufacturing of the position control valve of big through-current capability.
Correspondingly; The position control valve of technical conceive scope of the present invention can sum up following basic embodiment: said position control valve comprises valve body 2, the valve rod 3 that cooperates with this valve body 2, is formed at least two hydraulic fluid ports on the said valve body 2; Wherein, When said valve rod 3 moves to each working position of said position control valve, be interconnected through at least two through-flow oil ducts in inside respectively between the hydraulic fluid port that is interconnected in said at least two hydraulic fluid ports.
Particularly; Each said hydraulic fluid port is communicated with many inner oil ducts that are formed in the said valve body 2 respectively, and (each hydraulic fluid port has two or more respectively as required; Promptly here " many " refer to the inside oil duct more than two); Be formed with a plurality of circular grooves on the said valve rod 3; When said valve rod 3 moved to each working position of said position control valve, the corresponding hydraulic fluid port in said at least two hydraulic fluid ports formed the through-flow oil duct in said at least two inside through corresponding said inner oil duct and the corresponding said circular groove on the said valve rod 3 that is communicated with separately, thereby realized being interconnected.
Above-mentioned basic embodiment included in the technical conceive scope of the present invention all can practical implementation form and simple deformation mode; For this basic technical scheme; For helping it will be apparent to those skilled in the art that to need specific explanations following: first; Valve rod 3 that cooperates with valve body 2 about valve body 2 etc. belongs to the known configurations of position control valve, repeats no more; The second, in above-mentioned basic embodiment, at least two hydraulic fluid ports on the valve body 2 are not clearly divided into actuator port, filler opening or return opening etc. in the embodiment of image pattern 5 to Fig. 8; In fact, the application of position control valve in hydraulic system is very extensive, although the general function of its required realization is to change the oil circuit direction; But it is different being applied in the concrete effect that realizes in the different oil circuits; For example, two position three-way valve can be applied to the oil inlet and oil return that single-action hydraulic cylinder is realized rodless cavity, and one be that filler opening, one are return opening, another is actuator port in this moment three hydraulic fluid ports; But same two position three-way valve; It also can be used for the hydraulic oil of an oil feeding line is fed to respectively in two working oil path, and this moment can be with above-mentioned actuator port as filler opening, and filler opening and return opening are as actuator port; For another example, the bi-bit bi-pass selector valve, it only has a working position, and another is a rest position, and two hydraulic fluid ports of this bi-bit bi-pass selector valve only are when the working position, to realize through-flow function not having the differentiation of clear and definite filler opening, return opening or actuator port.That is to say that for position control valve, each hydraulic fluid port on its valve body 2 fully can be according to the internal structure of application need and position control valve and with some hydraulic fluid port as actuator port, filler opening or return opening; The 3rd; With regard to the working position of position control valve; To those skilled in the art knownly; Conventional selector valve generally has meta and working position (specifically being meant the mobile position of valve rod 3); Generally to be the selector valve hydraulic oil that is in the cut-off state of each hydraulic fluid port or is fed to this selector valve from the hydraulic fluid port as filler opening directly flow to as the hydraulic fluid port of return opening meta returns fuel tank, and the working position is the mobile position that selector valve is realized the valve rod 3 of its commutation function, and selector valve has two hydraulic fluid ports at least and is interconnected in the working position.Certainly, for some specific selector valves, there is not meta, two position three way directional control valve for example, two mobile positions of its valve rod are two working positions; For the bi-bit bi-pass selector valve, it only has a working position, and another working position of valve rod is a rest position, and promptly two hydraulic fluid ports are in cut-off state; The 4th; In above-mentioned basic embodiment; Be interconnected through at least two through-flow oil ducts in inside respectively between the hydraulic fluid port that is interconnected in said at least two hydraulic fluid ports; The structural type of relevant inner through-flow oil duct is various, mainly is through the valve inner oil duct that is communicated with each hydraulic fluid port and the realizations such as circular groove on the valve rod 3, it should be noted that at this; Move to arbitrary working position at valve rod; Be interconnected through at least two through-flow oil ducts in inside respectively between the hydraulic fluid port that is interconnected, but do not mean that some valve inner oil ducts that form in these inner through-flow oil ducts cannot be shared, when valve rod 3 moves to next working position; The valve inner oil duct that participate in to form the through-flow oil duct in inside of a last working position can participate in forming the through-flow oil duct of this next working position fully, for example Fig. 5 second oil-feed oil duct P2 in the embodiment shown in Figure 8 extremely.But relevant inner through-flow oil duct the present invention does not do special restriction, and no matter how its structure is out of shape, as long as adopt technical conceive of the present invention, all belongs to protection scope of the present invention.
Relevant position control valve of the present invention increases the principle and the through-flow process of through-current capability, is illustrated in the embodiment in above-mentioned Fig. 5 to Fig. 8, repeats no more at this.
Can find out by last description; Position control valve of the present invention is highly suitable for realizing the switching-over control to high-volume hydraulic oil; This position control valve can significantly strengthen the through-current capability of position control valve under the situation of maintaining valve shank diameter size constancy, thereby can under the situation that does not significantly increase difficulty of processing, increase the rated flow of position control valve; That is to say; Its diameter that need not to increase the hydrovalve valve rod just can be at double the through-current capability of increase hydrovalve, thereby can utilize existing process equipment and technology just can realize the production and processing of big flow control valve, reduced cost of production.And; Lead under the certain situation of required through-current capability; Cross position control valve of the present invention can reduce valve rod radial dimension and through increasing the quantity of inner through-flow oil duct; Realize required through-current capability, thereby can reduce the size of position control valve, make that the structure of position control valve is compact more.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned mode of execution; In technical conceive scope of the present invention, can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (11)
1. position control valve; Comprise valve body (2), the valve rod (3) that cooperates with this valve body (2), be formed at least two hydraulic fluid ports on the said valve body (2); Wherein, When said valve rod (3) moves to each working position of said position control valve, be interconnected through at least two through-flow oil ducts in inside separately between the hydraulic fluid port that is interconnected in said at least two hydraulic fluid ports.
2. position control valve according to claim 1; Wherein, Each said hydraulic fluid port is communicated with many inner oil ducts that are formed in the said valve body (2) respectively; Said valve rod is formed with a plurality of circular grooves on (3); When said valve rod (3) moved to each working position of said position control valve, the corresponding hydraulic fluid port in said at least two hydraulic fluid ports formed the through-flow oil duct in said at least two inside through corresponding said inner oil duct and the corresponding said circular groove on the said valve rod (3) that is communicated with separately, thereby realized being interconnected.
3. position control valve according to claim 2, wherein, said at least two hydraulic fluid ports comprise filler opening (P), return opening (T), first actuator port (A) and second actuator port (B).
4. position control valve according to claim 3; Wherein, The said inner oil duct that forms in the said valve body (2) comprises first to the 3rd oil-feed oil duct (P1 that is communicated with said filler opening (P); P2; P3), first actuator port, first oil duct (A1) that is communicated with said first actuator port (A) and first actuator port, second oil duct (A2), second actuator port, first oil duct (B1) that is communicated with said second actuator port (B) and second actuator port, second oil duct (B2) and the first to fourth oil return oil duct that is communicated with said return opening (T), the circular groove on the said valve rod (3) comprises first to fourth circular groove (4,5 that forms at interval successively; 6,7).
5. position control valve according to claim 4; Wherein, Said working position comprises first working position and second working position; When said valve rod (3) moves to said first working position, be communicated with through the first and second inner through-flow oil ducts between said filler opening (P) and said first actuator port (A), and be communicated with through the third and fourth inner through-flow oil duct between said return opening (T) and said second actuator port (B); When said valve rod (3) moves to said second working position; Be communicated with through the 5th and the 6th inner through-flow oil duct between said filler opening (P) and said second actuator port (B), and be communicated with through the 7th and the 8th inner through-flow oil duct between said return opening (T) and said first actuator port (A).
6. position control valve according to claim 5; Wherein, When said valve rod (3) moves to said first working position; The said first inner through-flow oil duct comprises the said first oil-feed oil duct (P1), first circular groove (4) and first actuator port, first oil duct (A1) that is communicated with successively; The said second inner through-flow oil duct comprises the said second oil-feed oil duct (P2), second circular groove (5) and first actuator port, second oil duct (A2) that is communicated with successively; The said the 3rd inner through-flow oil duct comprises said second actuator port, first oil duct (B1), the 3rd circular groove (6) and the 3rd oil return oil duct that is communicated with successively, and the said the 4th inner through-flow oil duct comprises second actuator port, second oil duct (B2), the 4th circular groove (7) and the 4th oil return oil duct that is communicated with successively.
7. position control valve according to claim 5; Wherein, When said valve rod (3) moves to said second working position; The said the 5th inner through-flow oil duct comprises the said second oil-feed oil duct (P2), the 3rd circular groove (6) and second actuator port, first oil duct (B1) that is communicated with successively; The said the 6th inner through-flow oil duct comprises said the 3rd oil-feed oil duct (P3), the 4th circular groove (7) and second actuator port, second oil duct (B2) that is communicated with successively; The said the 7th inner through-flow oil duct comprises said first actuator port, first oil duct (A1), first circular groove (4) and the first oil return oil duct that is communicated with successively, and the said the 8th inner through-flow oil duct comprises said first actuator port, second oil duct (A2), second circular groove (5) and the second oil return oil duct that is communicated with successively.
8. position control valve according to claim 1, wherein, said position control valve is the hyraulic controlled type selector valve, the liquid controling cavity at the two ends of this hyraulic controlled type selector valve is connected with the pilot solenoid valve (1) that is used to control the corresponding said liquid controling cavity of hydraulic control oil turnover respectively.
9. position control valve according to claim 3; Wherein, When said valve rod (3) moves to said first working position or second working position, pass through three and the above through-flow oil duct connection in inside between the hydraulic fluid port that is interconnected in said filler opening (P), return opening (T), first actuator port (A) and second actuator port (B) separately.
10. according to each described position control valve in the claim 1 to 9; Wherein, Said valve rod (3) and valve body (2) cooperate in the arbitrary working position moving process of said valve rod (3) in each working position of said position control valve, and the through-flow oil duct in said at least two inside that is used for being communicated with the corresponding hydraulic fluid port of said at least two hydraulic fluid ports in this arbitrary working position is opened simultaneously.
11. according to each described position control valve in the claim 1 to 9; Wherein, Said valve rod (3) and valve body (2) cooperate in the arbitrary working position moving process of said valve rod (3) in each working position of said position control valve, and the through-flow oil duct in said at least two inside that is used for being communicated with the corresponding hydraulic fluid port of said at least two hydraulic fluid ports in this arbitrary working position is opened successively.
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| CN104165166A (en) * | 2014-07-30 | 2014-11-26 | 株洲中研流体技术有限公司 | Compact-type telescopic oil cylinder changeover valve set |
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| CN113719487A (en) * | 2021-07-21 | 2021-11-30 | 北京中金泰达电液科技有限公司 | Low-temperature hydraulic combined valve terminal |
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