CN103671328B - An automatic reversing rotary valve - Google Patents
An automatic reversing rotary valve Download PDFInfo
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- CN103671328B CN103671328B CN201310709839.8A CN201310709839A CN103671328B CN 103671328 B CN103671328 B CN 103671328B CN 201310709839 A CN201310709839 A CN 201310709839A CN 103671328 B CN103671328 B CN 103671328B
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Abstract
The present invention discloses a kind of automatic reverse rotary valve, comprises spool, valve body, the first end cap, the second end cap.The outer wall of spool is provided with first protruding, second protruding and the 3rd protruding, first protruding, the second protruding and the 3rd projection along spool outer wall circumferentially.First end face of spool is provided with the first groove and the second groove, and the second end face of spool is provided with the 3rd groove and the 4th groove.The inwall of valve body is provided with the 4th protruding and the 5th projection, and the 4th projection and the 5th projection are provided with the 5th groove and the 6th groove.Be provided with the first oil duct and the second oil duct in valve body, the first oil duct is communicated with the 5th groove, and the second oil duct is communicated with the 6th groove.First end covers and is provided with P hydraulic fluid port, and the second end cap is provided with A, B, T hydraulic fluid port.The invention has the beneficial effects as follows: the feedback flow physical efficiency entering the first oil duct and the second oil duct promotes spool and rotates in valve body, thus controls rotary valve automatic reverse, and when actuator's high frequency action, still amplitude reserving is constant.
Description
Technical field
The present invention relates to a kind of automatic reverse rotary valve, actuator can be made to move back and forth by the automatic reverse of rotary valve.
Background technique
Rotary valve refers to the valve being controlled runner break-make and commutation by Spool rotating, usually all needs to drive Spool rotating to complete commutation action by external motor or rotational rate electromagnet.On the one hand external motor or rotational rate electromagnet can increase space that device takies and add the complexity of whole system, usual and motor or rotational rate electromagnet the rotating speed of the commutating frequency of rotary valve is directly proportional on the other hand, when frequency is very high, the flow of rotary valve can be very little, the amplitude of actuator can be very little, causes actuator normally to work.
Summary of the invention
The object of this invention is to provide a kind of automatic reverse rotary valve, when actuator's high frequency action, still amplitude reserving is constant.
For achieving the above object, the technical solution used in the present invention is: automatic reverse rotary valve of the present invention, comprise spool, valve body, the first end cap and the second end cap, it is characterized in that: on the outer wall of spool, be provided with first protruding, the second protruding and the 3rd projection, first protruding, the second protruding and the 3rd projection along spool outer wall circumferentially, described first protruding, second protruding and the 3rd be protrudingly Spielpassung with the inwall of valve body; Second end face of spool is provided with the 3rd groove and the 4th groove, and described spool axially has through hole as the 3rd oil duct along it, and described 3rd oil duct is communicated with the 3rd groove;
The inwall of valve body is circumferentially provided with the 4th protruding and the 5th projection, the 4th projection is provided with the 5th groove, and the 5th projection is provided with the 6th groove, and the described 4th protruding and the 5th projection and spool outer wall is Spielpassung; Be provided with the first oil duct and the second oil duct in valve body, the first oil duct is communicated with the 5th groove, and the second oil duct is communicated with the 6th groove;
Described first end covers the P filler opening having and the 3rd oil duct can be made to be communicated with oil supply system; Second end cap has the A hydraulic fluid port and B hydraulic fluid port that can be communicated with actuator, the second end cap also has the T return opening that the 3rd groove can be made to be communicated with fuel tank;
Described first end cap is connected with valve seal, and the interior edge face of the first end cap and the first end face of spool are tightly connected; Second end cap is connected with valve seal, and the interior edge face of the second end cap is connected with the second end face seal of spool;
The first oil pocket is formed between 3rd projection of described spool and the 5th projection of valve body, the second oil pocket is formed between 3rd projection of spool and the 4th projection of valve body, form the 3rd oil pocket between first projection of spool and the 4th projection of valve body, between the second projection of spool and the 5th projection of valve body, form the 4th oil pocket;
Fed-back fluid from actuator enters described first oil duct and can promote spool and rotate forward, when described valve core rotation is to described second protruding the 5th projection contacts with valve body, described P filler opening is communicated with by the 3rd groove with A hydraulic fluid port, and B hydraulic fluid port is communicated with by the 4th groove with T return opening; Fed-back fluid from actuator enters the second oil duct and can promote spool and rotate backward, when valve core rotation is to described first protruding the 4th projection contacts with valve body, P filler opening is communicated with by the 3rd groove with B hydraulic fluid port, and A hydraulic fluid port is communicated with by the 4th groove with T return opening.
Further, the medial axis of the 3rd oil duct of the present invention overlaps with the medial axis of described spool.
Further, the second end cap of the present invention also has the 7th groove, described 7th groove is communicated with the first oil pocket, and the 7th groove is communicated with the second oil pocket, and the 7th groove is communicated with T return opening.
Further, the interior edge face of the first end cap of the present invention is provided with the first boss, and described first boss stretches in the 3rd oil duct.
Further, the interior edge face of the second end cap of the present invention is provided with the second boss, and described second boss stretches in the 3rd oil duct.
Further, the first end face of spool of the present invention is provided with the first groove and the second groove, and described first groove is communicated with by the 3rd oil duct with the 3rd groove; Described spool axially has through hole as the 4th oil duct along it, and described second groove is communicated with the 4th groove by the 4th oil duct.
Further, the first groove of the present invention overlaps with the orthographic projection of the 3rd groove on the projection plane vertical with the medial axis of spool.
Further, the second groove of the present invention overlaps with the orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool.
Compared with prior art, the invention has the beneficial effects as follows: the fluid that automatic reverse rotary valve of the present invention is fed back to by actuator controls rotary valve automatic reverse, cast out in prior art and controlled motor needed for rotary valve commutation or rotational rate electromagnet, greatly simplify system and reduce the space that device takies.And prior art cannot ensure that actuator comprises oil hydraulic cylinder, cylinder, hydraulic swing motor etc. and still has large amplitude when high frequency action, and the commutating frequency of automatic reverse rotary valve of the present invention is directly proportional to the flow of system, when actuator's high frequency action, still can ensure that the amplitude of actuator is constant.
Accompanying drawing explanation
Fig. 1 is the explosive view of a kind of automatic reverse rotary valve of the present invention;
Fig. 2 is the internal structure schematic diagram after a kind of automatic reverse rotary valve of the present invention removes the first end cap, and what wherein dotted line represented is inner oil duct or groove;
Fig. 3 three-dimensional structure schematic diagram that to be spool cut open along the longitudinal section, center of spool;
Fig. 4 is the three-dimensional structure schematic diagram of valve body when laterally cutting open;
Fig. 5 is the worm's eye view of the first end cap in Fig. 1;
Fig. 6 is the plan view of the second end cap in Fig. 1;
Fig. 7 is the fundamental diagram of a kind of automatic reverse rotary valve of the present invention when being connected with oil hydraulic cylinder, and now, P filler opening is communicated with B hydraulic fluid port, and wherein automatic reverse rotary valve part is the state after removing the first end cap;
Fig. 8 is the fundamental diagram of a kind of automatic reverse rotary valve of the present invention when being connected with oil hydraulic cylinder, and now P filler opening is communicated with A hydraulic fluid port, and wherein rotary valve part is the state after removing the first end cap;
In figure, 1-spool; 2-valve body; 3-first end cap; 4-second end cap; 5-first is protruding; 6-second is protruding; 7-the 3rd is protruding; 8-first groove; 9-second groove; 10-the 3rd groove; 11-the 4th groove; 12-the 4th is protruding; 13-the 5th is protruding; 14-the 5th groove; 15-the 6th groove; 16-first oil duct; 17-second oil duct; 18-P filler opening; 19-A hydraulic fluid port; 20-B hydraulic fluid port; 21-T return opening; 22-the 7th groove; 23-the 3rd oil duct; 24-the 4th oil duct; 25-first oil pocket; 26-second oil pocket; 27-the 3rd oil pocket; 28-the 4th oil pocket; 29-first boss; 30-second boss; 31-the 5th oil duct; 32-the 6th oil duct; 33-the 7th oil duct; 34-the 8th oil duct; 35-the 9th oil duct; 36-the tenth oil duct; 37-the 11 oil duct; 38-cylinder body; 39-piston rod; 40-the 3rd end cap; 41-the 4th end cap; 42-the 3rd boss; 43-the 4th boss; 44-the 5th boss; 45-the 5th oil pocket; 46-the 6th oil pocket; 47-the 7th oil pocket; 48-the 8th oil pocket.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As shown in Figure 1, automatic reverse rotary valve of the present invention mainly comprises spool 1, valve body 2, first end cap 3 and the second end cap 4, the outer wall of spool 1 is provided with the first projection 5, second protruding 6 and the 3rd projection 7, first projection 5, second protruding 6 and the 3rd projection 7 along spool 1 outer wall compartment of terrain circumferentially.As shown in Figure 2, first protruding 5 adopts Spielpassung with the inwall of valve body, and second protruding 6 adopts Spielpassung with the inwall of valve body, and the 3rd protruding 7 adopts Spielpassung with the inwall of valve body.As shown in Figure 3, the second end face of spool 1 is provided with the 3rd groove 10 and the 4th groove 11, and spool 1 axially has through hole along it and is communicated with the 3rd groove 10 as the 3rd oil duct the 23, three oil duct 23.
As shown in Figure 1 and Figure 4, the inwall of valve body 2 is provided with the the 4th protruding 12 and the 5th projection the 13, four projection 12 and is provided with the 5th groove the 14, five projection 13 and is provided with the 6th groove 15.As shown in Figure 2, the 4th protruding 12 adopts Spielpassung with the outer wall of spool, and the 5th protruding 13 adopts Spielpassung with the outer wall of spool.Be provided with the first oil duct 16 in valve body 2 and the second oil duct 17, first oil duct 16 is communicated with the 5th groove 14, the second oil duct 17 is communicated with the 6th groove 15.
As shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 6, the first end cap 3 has the P filler opening 18 that the 3rd oil duct 23 can be made to be communicated with oil supply system.Second end cap 4 has on the A hydraulic fluid port 19 that can be communicated with actuator and B hydraulic fluid port 20, second end cap 4 and also have the T return opening 21 that the 3rd groove 10 can be made to be communicated with fuel tank.Actuator comprises oil hydraulic cylinder, cylinder, hydraulic swing motor etc.
First end cap 3 is tightly connected with valve body 2, and the interior edge face of the first end cap 3 and the first end face of spool 1 are tightly connected.Second end cap 4 is tightly connected with valve body 2, and the interior edge face of the second end cap 4 is connected with the second end face seal of spool 1.
As shown in Figure 2, the first oil pocket 25 is formed between the 3rd protruding 7 of spool 1 and the 5th projection 13 of valve body 2, the second oil pocket 26 is formed between the 3rd protruding 7 of spool 1 and the 4th projection 12 of valve body 2, form the 3rd oil pocket 27 between first protruding 5 of spool 1 and the 4th projection 12 of valve body 2, between second protruding 6 of spool 1 and the 5th projection 13 of valve body 2, form the 4th oil pocket 28.First oil pocket 25, second oil pocket 26, the 3rd oil pocket 27 are not directly communicated with the 4th oil pocket 28.
Oil hydraulic cylinder is a kind of actuator matched with rotary valve.In shown in Fig. 7 and Fig. 8, oil hydraulic cylinder mainly comprises cylinder body 38, piston rod 39, the 3rd end cap 40 and the 4th end cap 41.Piston rod is provided with the 3rd boss 42, the 4th boss 43 and the 5th boss the 44, three boss 42, the 4th boss 43 and the direction of the 5th boss 44 along the 3rd end cap 40 to the 4th end cap 41 and arranges successively.The 5th oil pocket 45 is formed between 3rd boss 42 and the 3rd end cap 40, the 6th oil pocket 46 is formed between 3rd boss 42 and the 4th boss 43, formed between 4th boss 43 and the 5th boss 44 between the 7th oil pocket the 47, five boss 44 and the 4th end cap 41 and form the 8th oil pocket 48.Cylinder body 38 is provided with the 5th oil duct 31, the 6th oil duct 32, the 7th oil duct 33, the 8th oil duct 34, the 9th oil duct 35, the tenth oil duct the 36, the 11 oil duct 37.Described 8th oil duct 34 is communicated with the 5th oil pocket 45 all the time, and the 9th oil duct 35 is communicated with the 8th oil pocket 48 all the time.When piston rod 39 moves to maximum position left, the 5th oil duct 31 is communicated with by the 7th oil pocket 47 with the 7th oil duct 33, and the 6th oil duct 32 is communicated with by the 6th oil pocket 46 with the tenth oil duct 36.When piston rod 39 moves right maximum position, the 5th oil duct 31 is communicated with by the 6th oil pocket 46 with the 6th oil duct 32, and the 7th oil duct 33 is communicated with by the 7th oil pocket 47 with the 11 oil duct 37.
As shown in Figure 7 and Figure 8, when piston rod moves to maximum position left, fed-back fluid from actuator is entered by the first oil duct 16 by the 5th oil duct 31, the 7th oil pocket 47 and the 7th oil duct 33 successively, the first projection 5 of spool 1 is acted on after the 5th groove 14, promote spool 1 thus around the medial axis of valve body 2 toward counterclockwise rotating, until second of spool 1 protruding 6 contacts with the 5th protruding 13 of valve body 2, now P filler opening 18 is communicated with A hydraulic fluid port 19, and B hydraulic fluid port 20 is communicated with T return opening 21.
As shown in Figure 7 and Figure 8, when piston rod moves right maximum position, fed-back fluid from actuator is entered by the second oil duct 17 by the 5th oil duct 31, the 6th oil pocket 46 and the 6th oil duct 32 successively, the second projection 6 of spool 1 is acted on after the 6th groove 15, promote spool 1 thus to rotate toward clockwise direction around the medial axis of valve body 2, until first of spool 1 protruding 5 contacts with the 4th protruding 12 of valve body 2, now P filler opening 18 is communicated with B hydraulic fluid port 20, and A hydraulic fluid port 19 is communicated with T return opening 21.Along with fed-back fluid enters rotary valve of the present invention from the first oil duct 16 and the second oil duct 17 successively, the automatic reverse of rotary valve can be realized.
As preferred version of the present invention, as shown in Figure 6, the second end cap 4 also can have the 7th groove the 22, seven groove 22 and be communicated with the second oil pocket 26 with the first oil pocket 25, the 7th groove 22 is communicated with T return opening 21.In the rotary course of spool 1, the size of the first oil pocket 25 and the second oil pocket 26 is correspondingly constantly changing, and when the first oil pocket 25 or the second oil pocket 26 can be diminished by the 7th groove 22, unnecessary hydraulic oil sends back to fuel tank.
Preferred version the most of the present invention, as shown in Figure 5, the interior edge face of the first end cap 3 is provided with the first boss 29, first boss 29 and extend in the 3rd oil duct 23, is more conducive to spool 1 like this and rotates in valve body 2.
As preferred version of the present invention, as shown in Figure 6, the interior edge face of the second end cap 4 is provided with the second boss 30, second boss 30 and extend in the 3rd oil duct 23, is more conducive to spool 1 like this and rotates in valve body 2.
As preferred version of the present invention, the unidirectional static pressure produced in the 3rd groove 10 and the 4th groove 11 for avoiding fluid is on the impact of valve core rotation, as shown in Figure 3, the first end face of spool the first groove 8 can be provided with and the second groove the 9, three oil duct 23 is communicated with the first groove 8 and the 3rd groove 9.Along it, axially have through hole is communicated with the second groove 9 and the 4th groove 11 as the 4th oil duct the 24, four oil duct 24 to spool 1.
As preferred version of the present invention, the impact that the static pressure produced in the first groove 8 and the 3rd groove 10 for weakening fluid is rotated spool 1, can make the first groove 8 overlap with the orthographic projection of the 3rd groove 10 on the projection plane vertical with the medial axis of spool 1.
As preferred version of the present invention, the impact that the static pressure produced in the second groove 9 and the 4th groove 11 for weakening fluid is rotated spool 1, can make the second groove 9 overlap with the orthographic projection of the 4th groove 11 on the projection plane vertical with the medial axis of spool 1.
Using oil hydraulic cylinder as actuator, the working procedure of the automatic rotary valve of the present invention is explained below.When actuator is other forms such as cylinder, hydraulic swing motor, the working principle of the automatic rotary valve of the present invention is identical.The working procedure of automatic diverter valve of the present invention is: as shown in Figure 7, when first protruding 5 of spool 1 contacts with the 4th protruding 12 of valve body 2, system fuel feeding enters the 8th oil pocket 48 by P hydraulic fluid port 18, the 3rd oil duct 23, the 3rd groove 10, B hydraulic fluid port 20 and the 9th oil duct 35 successively, promotes piston rod 39 and is moved to the left.Hydraulic oil in 5th oil pocket flows back to fuel tank through the 8th oil duct 34, A hydraulic fluid port 19, the 4th groove 11 and T return opening 21 successively.After piston rod 39 is moved to the left to maximum position, system fuel feeding forms fed-back fluid by the 5th oil duct 31, the 7th oil pocket 47 and the 7th oil duct 33 successively, fed-back fluid enters the 5th groove 14 by the first oil duct 16, act on the first projection 5 of spool 1, promote spool 1 and rotate counterclockwise around the medial axis of valve body 2.Because spool 1 rotates counterclockwise, P filler opening 18 is no longer communicated with B hydraulic fluid port 20, the piston rod also stop motion of oil hydraulic cylinder.First oil pocket 25 and the 3rd oil pocket 27 become greatly gradually, and the second oil pocket 26 and the 4th oil pocket 28 diminish gradually, and the hydraulic oil in the 4th oil pocket 28 flows back to fuel tank by the 6th groove 15, second oil duct 17, the 6th oil duct 32, the 6th oil pocket 46 and the tenth oil duct 36 successively.Spool 1 rotates counterclockwise, until second of spool 1 protruding 6 contacts with the 5th protruding 13 of valve body 2, spool 1 completes commutation action.
As shown in Figure 8, when second protruding 6 of spool 1 contacts with the 5th protruding 13 of valve body 2, system fuel feeding enters the 5th oil pocket 45 by P hydraulic fluid port 18, the 3rd oil duct 23, the 3rd groove 10, A hydraulic fluid port 19 and the 8th oil duct 34 successively, promotes piston rod 39 and moves right.Hydraulic oil in 8th oil pocket 48 flows back to fuel tank through the 9th oil duct 35, B hydraulic fluid port 20, the 4th groove 11 and T return opening 21 successively.After piston rod 39 moves right to maximum position, system fuel feeding forms fed-back fluid by the 5th oil duct 31, the 6th oil pocket 46 and the 6th oil duct 32 successively, fed-back fluid enters the 6th groove 15 by the second oil duct 17, act on the second projection 6 of spool 1, promote spool 1 and rotate clockwise around the medial axis of valve body 2.Because spool 1 rotates clockwise, P filler opening 18 is no longer communicated with A hydraulic fluid port 19, the piston rod 39 also stop motion of oil hydraulic cylinder.First oil pocket 25 and the 3rd right chamber 27 diminish gradually, second oil pocket 26 and the 4th oil pocket 28 become greatly gradually, and the hydraulic oil in the 3rd oil pocket 27 flows back to fuel tank by the 5th groove 14, first oil duct 16, the 7th oil duct 33, the 7th oil pocket the 47 and the 11 oil duct 37 successively.Spool 1 rotates clockwise, until first of spool 1 protruding 5 contacts with the 4th protruding 12 of valve body 2, spool 1 completes commutation action.Then rotary valve and oil hydraulic cylinder can carry out action by shown in Fig. 7 again, thus realize rotary valve automatic reverse, and hydraulic control cylinder vibrates back and forth.
In rotary valve of the present invention and actuator's working procedure, rotary valve controls actuator's motion, and when actuator's positive movement is to maximum position, the fluid fed back to from actuator enters the first oil duct 16, acts on spool, rotary valve is commutated.When actuator's reversing motion is to maximum position, the fluid fed back to from actuator enters the second oil duct, acts on spool, and rotary valve is commutated again, gets back to last state, thus realizes the automatic reverse of rotary valve.
The content of this specification statement enumerating just to the way of realization of inventive concept; concrete mode shown in protection scope of the present invention should not be regarded as being confined to implementing, and those skilled in the art should be involved in conceive the equivalent technologies mode that can think deeply according to the present invention.
Claims (8)
1. an automatic reverse rotary valve, comprise spool, valve body, the first end cap and the second end cap, it is characterized in that: on the outer wall of spool, be provided with first protruding, the second protruding and the 3rd projection, first protruding, the second protruding and the 3rd projection along spool outer wall circumferentially, described first protruding, second protruding and the 3rd be protrudingly Spielpassung with the inwall of valve body; Second end face of spool is provided with the 3rd groove and the 4th groove, and described spool axially has through hole as the 3rd oil duct along it, and described 3rd oil duct is communicated with the 3rd groove;
The inwall of valve body is circumferentially provided with the 4th protruding and the 5th projection, the 4th projection is provided with the 5th groove, and the 5th projection is provided with the 6th groove, and the described 4th protruding and the 5th projection and spool outer wall is Spielpassung; Be provided with the first oil duct and the second oil duct in valve body, the first oil duct is communicated with the 5th groove, and the second oil duct is communicated with the 6th groove;
Described first end covers the P filler opening having and the 3rd oil duct can be made to be communicated with oil supply system; Second end cap has the A hydraulic fluid port and B hydraulic fluid port that can be communicated with actuator, the second end cap also has the T return opening that the 3rd groove can be made to be communicated with fuel tank;
Described first end cap is connected with valve seal, and the interior edge face of the first end cap and the first end face of spool are tightly connected; Second end cap is connected with valve seal, and the interior edge face of the second end cap is connected with the second end face seal of spool;
The first oil pocket is formed between 3rd projection of described spool and the 5th projection of valve body, the second oil pocket is formed between 3rd projection of spool and the 4th projection of valve body, form the 3rd oil pocket between first projection of spool and the 4th projection of valve body, between the second projection of spool and the 5th projection of valve body, form the 4th oil pocket;
Fed-back fluid from actuator enters described first oil duct and can promote spool and rotate forward, when described valve core rotation is to described second protruding the 5th projection contacts with valve body, described P filler opening is communicated with by the 3rd groove with A hydraulic fluid port, and B hydraulic fluid port is communicated with by the 4th groove with T return opening; Fed-back fluid from actuator enters the second oil duct and can promote spool and rotate backward, when valve core rotation is to described first protruding the 4th projection contacts with valve body, P filler opening is communicated with by the 3rd groove with B hydraulic fluid port, and A hydraulic fluid port is communicated with by the 4th groove with T return opening.
2. automatic reverse rotary valve according to claim 1, is characterized in that: the medial axis of described 3rd oil duct overlaps with the medial axis of described spool.
3. automatic reverse rotary valve according to claim 1 and 2, is characterized in that: described second end cap also has the 7th groove, and described 7th groove is communicated with the first oil pocket, and the 7th groove is communicated with the second oil pocket, and the 7th groove is communicated with T return opening.
4. automatic reverse rotary valve according to claim 1 and 2, is characterized in that: the interior edge face of described first end cap is provided with the first boss, and described first boss stretches in the 3rd oil duct.
5. automatic reverse rotary valve according to claim 1 and 2, is characterized in that: the interior edge face of described second end cap is provided with the second boss, and described second boss stretches in the 3rd oil duct.
6. automatic reverse rotary valve according to claim 1 and 2, is characterized in that: the first end face of described spool is provided with the first groove and the second groove, and described first groove is communicated with by the 3rd oil duct with the 3rd groove; Described spool axially has through hole as the 4th oil duct along it, and described second groove is communicated with the 4th groove by the 4th oil duct.
7. automatic reverse rotary valve according to claim 6, is characterized in that: described first groove overlaps with the orthographic projection of the 3rd groove on the projection plane vertical with the medial axis of spool.
8. automatic reverse rotary valve according to claim 6, is characterized in that: described second groove overlaps with the orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310709839.8A CN103671328B (en) | 2013-12-21 | 2013-12-21 | An automatic reversing rotary valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310709839.8A CN103671328B (en) | 2013-12-21 | 2013-12-21 | An automatic reversing rotary valve |
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| CN103671328A CN103671328A (en) | 2014-03-26 |
| CN103671328B true CN103671328B (en) | 2015-12-09 |
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| CN201310709839.8A Expired - Fee Related CN103671328B (en) | 2013-12-21 | 2013-12-21 | An automatic reversing rotary valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104088838B (en) * | 2014-05-12 | 2015-12-02 | 浙江大学 | A kind of hydraulic control unscrewing type one-way valve |
| CN104033439A (en) * | 2014-06-12 | 2014-09-10 | 浙江大学 | Valve-body-free rotary change valve device |
| CN104344018B (en) * | 2014-10-28 | 2016-09-28 | 华中科技大学 | A kind of end surface sealed rotary valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628899A (en) * | 1995-03-10 | 1997-05-13 | Fleck Controls, Inc. | Control mechanism for controlling regeneration of two water treatment tanks |
| JP3398008B2 (en) * | 1997-04-22 | 2003-04-21 | 三洋電機株式会社 | Camera lens cover mechanism |
| DE10310662A1 (en) * | 2003-03-12 | 2004-09-23 | Ksb Aktiengesellschaft | Fitting for switchover of fluid path, has flow divisor with by-passes, and rotary disk-shaped steering elements that respectively sealing the axial face of the corresponding by-pass |
| CN101865170B (en) * | 2010-06-23 | 2013-01-23 | 南京航空航天大学 | Follow-up reversing mechanism and follow-up reserving method |
| CN102720669B (en) * | 2012-06-29 | 2015-03-04 | 泸州天府液压件有限公司 | Follower rotary valve for plane oil distribution |
| CN103291962B (en) * | 2013-06-26 | 2015-05-20 | 浙江大学 | Rotary valve device capable of automatically eliminating hydraulic cylinder piston offset |
| CN203685734U (en) * | 2013-12-21 | 2014-07-02 | 浙江大学 | Automatic reversing rotary valve |
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