CN102900720A - Differential pressure feedback type flow divider valve - Google Patents
Differential pressure feedback type flow divider valve Download PDFInfo
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- CN102900720A CN102900720A CN201210440144XA CN201210440144A CN102900720A CN 102900720 A CN102900720 A CN 102900720A CN 201210440144X A CN201210440144X A CN 201210440144XA CN 201210440144 A CN201210440144 A CN 201210440144A CN 102900720 A CN102900720 A CN 102900720A
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Abstract
The invention relates to a differential pressure feedback type flow divider valve. The differential pressure feedback type flow divider valve comprises a valve body, a reversing valve plug which is matched with a valve body hole formed in the middle of the valve body, a first screw plug which is matched with the left end of the valve body hole, and a second screw plug which is matched with the right end of the valve body hole, wherein a second flow channel which is slanted rightwards is formed in the left part of the middle of the reversing valve plug; a first flow channel is formed in the lower part of the valve body; one end of the first flow channel is communicated with a reversing cavity, and the other end of the first flow channel is communicated with an external hydraulic oil circuit; a first check valve is arranged on the left side of the upper part of the valve body; a second check valve is arranged on the right side of the upper part of the valve body; a damping hole is formed at the upper end of each of the first check valve and the second check valve; a positioning hole which is communicated with the valve body hole is also formed in the middle of the valve body; and a flow dividing positioning mechanism which is matched with a concave part on each of two sides of the reversing cavity is arranged in the positioning hole. The differential pressure feedback type flow divider valve is simple in structure and high in integration level.
Description
Technical field
The present invention relates to the hydraulic control device parts, be specifically related to a kind of Pressure difference feedback formula diverter valve.
Background technique
Existing agricultural machine generally comes the Circularly liftable of oil circuit control with following dual mode:
(1) adopt Manual double-connected switching valve with hydraulic control to realize conversion and the control of actuator's moving direction.When this control gear is installed, in order to alleviate the intense strain of operator when operating, can come fitting operation mechanism according to different operating person's operating habit, therefore, actuator also can shift one's position with the transfer of operating device, cause the installation inconvenience of actuator, and this control gear operational efficiency is low, energy consumption is large, can not satisfy the design requirement of modern agricultural machine.
(2) adopt a minute combiner valve.Combiner valve was generally multistage concentric type in existing minute, its complex structure, accuracy of manufacturing require high, and for the small farm machine, divide the afflux valve body long-pending huge (minimum gauge weight 14Kg), the control pipeline is easily contaminated, and in the small flow hydraulic mechanism, its shunting precision decrease, and have the in order elevating movements of circulation of thrust single-action hydraulic cylinder such as minute combiner valve can not realize now, therefore be not suitable for the operating mode of walk type agricultural machine.
Therefore, need to improve existing agricultural machine oil circuit control parts, to improve the performance of small-sized walk type agricultural machine.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, easy for installation, can realize that reciprocity thrust single-action hydraulic cylinder carries out the Pressure difference feedback formula diverter valve of Circularly liftable motion control.
Pressure difference feedback formula diverter valve of the present invention comprises valve body, the changeover valve core that matches with the valve body hole that is located at the valve body middle part, the first plug screw that cooperates with the valve body hole left end and the second plug screw that cooperates with the valve body hole right-hand member, the left part inwall of the right-hand member of described the first plug screw and the left end of changeover valve core and valve body hole forms A chamber runner, the right part inwall of the left end of described the second plug screw and the right-hand member of changeover valve core and valve body hole forms B chamber runner, left part and right part at described changeover valve core are respectively equipped with annular groove, the middle part of changeover valve core is provided with the both sides lower recess and the reversing groove of intermediate projections, the annular groove of described changeover valve core left part and right part cooperates with the valve body hole of valve body and forms respectively left active chamber and right active chamber, and the reversing groove at changeover valve core middle part cooperates the formation chamber of commutating with the valve body hole of valve body;
The position of taking back at the middle part of described changeover valve core is provided with the second runner that is tilted to the right, the upper end of this second runner communicates with described left active chamber, first damping hole of lower end through being located on the described changeover valve core communicates with the commutation chamber, is provided with an end the 3rd damping hole that the other end communicates with left active chamber that communicates with A chamber runner in the left part of described changeover valve core;
The position that takes at the middle part of described changeover valve core is provided with the 3rd runner that is tilted to the left, the upper end of the 3rd runner communicates with described right active chamber, second damping hole of lower end through being located on the described changeover valve core communicates with the commutation chamber, is provided with an end the 4th damping hole that the other end communicates with right active chamber that communicates with B chamber runner in the right part of described changeover valve core;
Bottom at described valve body is provided with first flow, and an end of this first flow communicates with described commutation chamber, the other end communicates with external hydraulic circuit;
Be provided with the 8th runner that communicates with external hydraulic circuit, the 4th runner and the 6th runner that an end communicates with the 8th runner on the left side on described valve body top, the other end of the 4th runner or the 6th runner communicates with left active chamber is corresponding, is provided with the first one-way valve in the 4th runner;
Be provided with the 9th runner that communicates with external hydraulic circuit, the 5th runner and the 7th runner that an end communicates with the 9th runner on the right on described valve body top, the other end of the 5th runner or the 7th runner communicates with right active chamber is corresponding, is provided with the second one-way valve in the 5th runner;
Middle part at described valve body also is provided with the positioning hole that communicates with valve body hole, is provided with the shunting positioning means with both sides, described commutation chamber recess corresponding matching in described positioning hole.
Described shunting positioning means is made of locking ball, retaining spring and location plug screw, and the projection at described locking ball and middle part, described commutation chamber connects.
Described the first one-way valve is made of the first one-way valve steel ball, the first balance spring and the first equilibrium bomb spring abutment; Described the second one-way valve is made of the second one-way valve steel ball, the second balance spring and the second equilibrium bomb spring abutment, and the upper end of described the first one-way valve and the second one-way valve is equipped with damping hole.
The present invention has the following advantages:
1) utilize, during the oil circuit conversion to the moment pressure reduction and damping change of bleed off circuit, realize to left and right two ends etc. the thrust single-action hydraulic cylinder carry out the control of Circularly liftable motion; By handle first flow and advance, the connected state of oil back chamber can realize the in order motion flow process of circulation of oil circuit, do not need other control element;
2) integrate diverter valve, the one-way valve group with damping hole, commutation locating function, dwindled the volume of whole Pressure difference feedback formula diverter valve, level of integration is high, delicate structure, and host configuration is flexible, has changed the multistage concentric labyrinth of existing diverter valve.
3) difficulty of processing is little, and feedback is sensitive, and is easy for installation.
4) the present invention be applicable to the farm machinery such as miniature seeding machine, transplanter, cropper etc. the control of the orderly Circularly liftable of thrust single-acting hydraulic actuator motion, also be applicable to the mechanism that small engineering machinery, road machine, environmental sanitation machinery need to realize similar hydraulic control function.
Description of drawings
Fig. 1 is plan view structural representation of the present invention;
Fig. 2 is the right elevation of Fig. 1;
Fig. 3 is the F-F sectional view of Fig. 1;
Fig. 4 is the E-E sectional view of Fig. 1;
Embodiment
The present invention is further elaborated below in conjunction with drawings and Examples:
Referring to Fig. 1 to Pressure difference feedback formula diverter valve shown in Figure 4, it comprises valve body 1, the changeover valve core 2 that matches with the valve body hole that is located at valve body 1 middle part, the first plug screw 3 that cooperates with the valve body hole left end and the second plug screw 4 that cooperates with the valve body hole right-hand member, the left part inwall of the left end of the right-hand member of described the first plug screw 3 and changeover valve core 2 and valve body hole forms A chamber runner 29, the right part inwall of the right-hand member of the left end of described the second plug screw 4 and changeover valve core 2 and valve body hole forms B chamber runner 30, left part and right part at described changeover valve core 2 are respectively equipped with annular groove, the middle part of changeover valve core 2 is provided with the both sides lower recess and the reversing groove of intermediate projections, the annular groove of described changeover valve core 2 left parts and right part cooperates with the valve body hole of valve body 1 and forms respectively left active chamber 31 and right active chamber 33, and the reversing groove at changeover valve core 2 middle parts cooperates with the valve body hole of valve body 1 and forms commutation chamber 32;
The position of taking back at the middle part of described changeover valve core 2 is provided with the second runner 15 that is tilted to the right, the upper end of this second runner 15 communicates with described left active chamber 31, first damping hole 23 of lower end through being located on the described changeover valve core 2 communicates with commutation chamber 32, is provided with an end the 3rd damping hole 25 that the other end communicates with left active chamber 31 that communicates with A chamber runner 29 in the left part of described changeover valve core 2;
The position that takes at the middle part of described changeover valve core 2 is provided with the 3rd runner 16 that is tilted to the left, the upper end of the 3rd runner communicates with described right active chamber 33, second damping hole 24 of lower end through being located on the described changeover valve core 2 communicates with commutation chamber 32, is provided with an end the 4th damping hole 26 that the other end communicates with right active chamber 33 that communicates with B chamber runner 30 in the right part of described changeover valve core 2;
Be provided with first flow 14 in the bottom of described valve body 1, an end of this first flow communicates with described commutation chamber 32, the other end communicates with external hydraulic circuit;
Be provided with the 8th runner 21 that communicates with external hydraulic circuit, the 4th runner 17 and the 6th runner 19 that an end communicates with the 8th runner on the left side on described valve body 1 top, the other end of the 4th runner 17 or the 6th runner 19 and left active chamber 31 corresponding communicating are provided with the first one-way valve in the 4th runner 17; Described the first one-way valve is made of the first one-way valve steel ball 5, the first balance spring 7 and the first equilibrium bomb spring abutment 9;
Be provided with the 9th runner 22 that communicates with external hydraulic circuit, the 5th runner 18 and the 7th runner 20 that an end communicates with the 9th runner on the right on described valve body 1 top, the other end of the 5th runner 18 or the 7th runner 20 and right active chamber 33 corresponding communicating are provided with the second one-way valve in the 5th runner 18; Described the second one-way valve is made of the second one-way valve steel ball 6, the second balance spring 8 and the second equilibrium bomb spring abutment 10;
The upper end of described the first one-way valve and the second one-way valve is equipped with damping hole;
Middle part at described valve body 1 also is provided with the positioning hole that communicates with valve body hole, is provided with the shunting positioning means with described commutation chamber 32 both sides recess corresponding matching in described positioning hole.Described shunting positioning means is made of locking ball 11, retaining spring 12 and location plug screw 13, and described locking ball 11 connects with the projection at 32 middle parts, described commutation chamber.
Working principle of the present invention:
1) the 9th runner is communicated with the hydraulic circuit of right-hand member, the 8th runner is communicated with the hydraulic circuit of left end, first flow by manual control with advance, the connected state of oil back chamber; If changeover valve core is pushed to the right side of valve body by the oil pressure in the runner of A chamber when initial operating mode, then, locking ball in the shunting positioning means snaps in the left side in commutation chamber under the effect of spring force, this locking ball positions the commutation spool, simultaneously, because left, right active chamber all moves right with changeover valve core, therefore, the 6th runner is communicated with by left active chamber with the second runner, the 7th runner is communicated with by right active chamber with the five or six road, and the 4th runner and the second runner, the 7th runner and the 3rd runner then are closed, thus stop the fluid of right-hand member to communicate with first flow and return into, oil back chamber; And the fluid of left end communicates with first flow through the first damping hole by the 8th runner and the 6th runner, thus with advance, oil back chamber is connected.At this moment and since first flow with advance, oil back chamber is in closed state, therefore, the fluid of left and right end all can't reflux; Its two, if when changeover valve core is pushed to the left side of valve body by the oil pressure in the runner of B chamber during initial operating mode, its control runner is opposite, can guarantee that the fluid of left and right end can't reflux equally.
2) when first flow is communicated with oil back chamber, this moment, the fluid of left end oil hydraulic cylinder was discharged to first flow through the 6th runner to the second runner from the first damping hole from the 8th runner, returns fuel tank through oil back chamber under action of gravitation.While is because of the throttling action of the first damping hole, so that the left end return pressure raises, part fluid enters A chamber runner fast through the 3rd damping hole, make the left end of spool stressed, at this moment, under the effect of the first damping hole, left end fluid slowly is back to oil back chamber, and right-hand member fluid is because of be positioned steel ball location of changeover valve core, and the back oil road of the 7th runner and the 3rd runner composition is closed and can not refluxes.
3) when external hydraulic oil in first flow enters valve body, be that first flow is when being communicated with oil suction chamber, communicate with the first damping hole and the second damping hole simultaneously after this fluid shunting, and communicate with A chamber runner and the B chamber runner at changeover valve core two ends respectively through the 3rd damping hole and the 4th damping hole, because the second runner and the 6th runner are in connected state, the pressure of left end fluid is rising under the input pressure effect, and be closed between the 3rd runner and the 7th runner, therefore right-hand member fluid still can not reflux, and thereby external hydraulic oil is obstructed through the hydraulic circuit path that flows into right-hand member that the second one-way valve enters the 9th runner from the 5th runner, under the effect of input pressure, the input pressure moment rising of the 3rd runner, and the pressure after raising is subjected to drag effect when the second damping hole feeds back to first flow and produce decay and feedback lags behind.Simultaneously, fluid after input pressure raises enters in the runner of B chamber fast through the 4th damping hole, this moment, the right-hand member of changeover valve core was stressed, because left end fluid is in the low-speed motion under the external pressure oil effect after the first damping hole throttling, the pressure that acts on A chamber runner this moment is lower than the oil pressure of B chamber runner, thereby promote fast changeover valve core and lift locking ball end motion left, this moment, locking ball snapped in the right side in commutation chamber under the effect of spring, thereby limit the position of changeover valve core, blocking simultaneously the second runner communicates with the 4th runner, make the 3rd runner and the 7th runner be in opening state, at this moment, the right-hand member oil liquid pressure remains unchanged.And external oil collecting is opened the first one-way valve through the 4th runner, enters the left end hydraulic circuit by the damping hole on the first one-way valve through the 8th runner.
4) when first flow is communicated with oil back chamber again, the fluid of right-hand member hydraulic circuit is discharged to first flow through the 5th runner to the three runners from the second damping hole from the 9th runner, and returns fuel tank by first flow; Owing to the throttling action of the second damping hole, fluid enters B chamber runner fast through the 4th damping hole simultaneously, and the right-hand member return pressure that changeover valve core is subject to raises, thereby continues the position that the maintenance changeover valve core moves to left.At this moment, the fluid of right-hand member slowly refluxes under the second damping hole effect, and the fluid of left end then rests in the runner because back oil road is closed.
Claims (3)
1. Pressure difference feedback formula diverter valve, comprise valve body (1), the changeover valve core (2) that matches with the valve body hole that is located at valve body (1) middle part, the first plug screw (3) that cooperates with the valve body hole left end and the second plug screw (4) that cooperates with the valve body hole right-hand member, the left part inwall of the left end of the right-hand member of described the first plug screw (3) and changeover valve core (2) and valve body hole forms A chamber runner (29), the right part inwall of the right-hand member of the left end of described the second plug screw (4) and changeover valve core (2) and valve body hole forms B chamber runner (30), left part and right part at described changeover valve core (2) are respectively equipped with annular groove, the middle part of changeover valve core (2) is provided with the both sides lower recess and the reversing groove of intermediate projections, the annular groove of described changeover valve core (2) left part and right part cooperates with the valve body hole of valve body (1) and forms respectively left active chamber (31) and right active chamber (33), and the reversing groove at changeover valve core (2) middle part cooperates the formation chamber (32) of commutating with the valve body hole of valve body (1); It is characterized in that:
The position of taking back at the middle part of described changeover valve core (2) is provided with the second runner (15) that is tilted to the right, the upper end of this second runner communicates with described left active chamber (31), first damping hole (23) of lower end through being located on the described changeover valve core (2) communicates with commutation chamber (32), is provided with an end the 3rd damping hole (25) that the other end communicates with left active chamber (31) that communicates with A chamber runner (29) in the left part of described changeover valve core (2);
The position that takes at the middle part of described changeover valve core (2) is provided with the 3rd runner (16) that is tilted to the left, the upper end of the 3rd runner communicates with described right active chamber (33), second damping hole (24) of lower end through being located on the described changeover valve core (2) communicates with commutation chamber (32), is provided with an end the 4th damping hole (26) that the other end communicates with right active chamber (33) that communicates with B chamber runner (30) in the right part of described changeover valve core (2);
Be provided with first flow (14) in the bottom of described valve body (1), an end of this first flow communicates with described commutation chamber (32), the other end communicates with external hydraulic circuit;
Be provided with the 8th runner (21) that communicates with external hydraulic circuit, the 4th runner (17) and the 6th runner (19) that an end communicates with the 8th runner on the left side on described valve body (1) top, the other end of the 4th runner (17) or the 6th runner (19) and corresponding the communicating of left active chamber (31) are provided with the first one-way valve in the 4th runner (17);
Be provided with the 9th runner (22) that communicates with external hydraulic circuit, the 5th runner (18) and the 7th runner (20) that an end communicates with the 9th runner on the right on described valve body (1) top, the other end of the 5th runner (18) or the 7th runner (20) and corresponding the communicating of right active chamber (33) are provided with the second one-way valve in the 5th runner (18);
Middle part at described valve body (1) also is provided with the positioning hole that communicates with valve body hole, is provided with the shunting positioning means with both sides, described commutation chamber (32) recess corresponding matching in described positioning hole.
2. a kind of Pressure difference feedback formula diverter valve according to claim 1, it is characterized in that: described shunting positioning means is made of locking ball (11), retaining spring (12) and location plug screw (13), and described locking ball (11) connects with the projection at middle part, described commutation chamber (32).
3. a kind of Pressure difference feedback formula diverter valve according to claim 1 and 2 is characterized in that: described the first one-way valve is made of the first one-way valve steel ball (5), the first balance spring (7) and the first equilibrium bomb spring abutment (9); Described the second one-way valve is made of the second one-way valve steel ball (6), the second balance spring (8) and the second equilibrium bomb spring abutment (10); The upper end of described the first one-way valve and the second one-way valve is equipped with damping hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440144.XA CN102900720B (en) | 2012-11-07 | 2012-11-07 | Differential pressure feedback type flow divider valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440144.XA CN102900720B (en) | 2012-11-07 | 2012-11-07 | Differential pressure feedback type flow divider valve |
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| Publication Number | Publication Date |
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| CN102900720A true CN102900720A (en) | 2013-01-30 |
| CN102900720B CN102900720B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210440144.XA Active CN102900720B (en) | 2012-11-07 | 2012-11-07 | Differential pressure feedback type flow divider valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711943A (en) * | 2013-12-21 | 2014-04-09 | 张福江 | Hydraulic sequence valve and control method thereof |
| CN112196853A (en) * | 2020-11-05 | 2021-01-08 | 上海航天控制技术研究所 | Hydraulic energy control valve block |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462983A (en) * | 1943-10-20 | 1949-03-01 | Bendix Aviat Corp | Fluid actuated valve |
| GB1067308A (en) * | 1965-04-08 | 1967-05-03 | Masao Yoshino | Flow control valve |
| US4232701A (en) * | 1978-04-25 | 1980-11-11 | Aisin Seiki Kabushiki Kaisha | Flow divider valve |
| EP0087003A1 (en) * | 1982-02-16 | 1983-08-31 | HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG | Flow divider |
| US4756330A (en) * | 1986-03-21 | 1988-07-12 | Zahnradfabrik Friedrichshafen, Ag. | Flow divider valve |
| JP2002106510A (en) * | 2000-09-28 | 2002-04-10 | Furukawa Co Ltd | Flow distributing and collecting valve |
| US6581622B2 (en) * | 2000-09-28 | 2003-06-24 | Glen Brand | Divider-combiner valve |
| CN201507491U (en) * | 2009-08-14 | 2010-06-16 | 史广成 | One-way dividing valve and collecting valve |
-
2012
- 2012-11-07 CN CN201210440144.XA patent/CN102900720B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462983A (en) * | 1943-10-20 | 1949-03-01 | Bendix Aviat Corp | Fluid actuated valve |
| GB1067308A (en) * | 1965-04-08 | 1967-05-03 | Masao Yoshino | Flow control valve |
| US4232701A (en) * | 1978-04-25 | 1980-11-11 | Aisin Seiki Kabushiki Kaisha | Flow divider valve |
| EP0087003A1 (en) * | 1982-02-16 | 1983-08-31 | HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG | Flow divider |
| US4756330A (en) * | 1986-03-21 | 1988-07-12 | Zahnradfabrik Friedrichshafen, Ag. | Flow divider valve |
| JP2002106510A (en) * | 2000-09-28 | 2002-04-10 | Furukawa Co Ltd | Flow distributing and collecting valve |
| US6581622B2 (en) * | 2000-09-28 | 2003-06-24 | Glen Brand | Divider-combiner valve |
| CN201507491U (en) * | 2009-08-14 | 2010-06-16 | 史广成 | One-way dividing valve and collecting valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711943A (en) * | 2013-12-21 | 2014-04-09 | 张福江 | Hydraulic sequence valve and control method thereof |
| CN112196853A (en) * | 2020-11-05 | 2021-01-08 | 上海航天控制技术研究所 | Hydraulic energy control valve block |
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| Publication number | Publication date |
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| CN102900720B (en) | 2014-12-10 |
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