CN201560993U - Balanced type load backfeed multiple directional control valve block - Google Patents
Balanced type load backfeed multiple directional control valve block Download PDFInfo
- Publication number
- CN201560993U CN201560993U CN2009201271838U CN200920127183U CN201560993U CN 201560993 U CN201560993 U CN 201560993U CN 2009201271838 U CN2009201271838 U CN 2009201271838U CN 200920127183 U CN200920127183 U CN 200920127183U CN 201560993 U CN201560993 U CN 201560993U
- Authority
- CN
- China
- Prior art keywords
- valve
- balanced type
- spring
- directional control
- type load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
Abstract
The utility model discloses a balanced type load backfeed multiple directional control valve block, which directly integrates balanced type load backfeed valves on a directional control valve body to be mixed with the directional control valve body into a whole body, so as to form a balanced type load backfeed control oil circuit. The valve body of the balanced type load backfeed multiple directional control valve block is provided with an upper part main hole and a lower part main hole; a slide valve component is installed in the lower part main hole, with two ends sealed; a balanced type load backfeed valve is installed in the upper part main hole of the valve body, with two ends sealed; a common oil inlet, a special pressure oil hole, a common oil return hole and a connecting screw hole are respectively arranged on two side surfaces of the valve body; an oil duct positioned in the reversing position in the valve body is respectively connected with the oil inlet duct and an oil return duct in the balanced type load backfeed valve; and an operation oil port is arranged at the upper part of the valve body and connected with a controlled hydraulic actuating element. The directional control valve block has a skillful structure and sensitive response to the variation of external load, can realize the stepless regulation of inching control or rapid control to external load through the control to the motion process of the directional control slide valve, has a safety protection function of a hydraulic one-way valve, and can form a widely applied novel hydraulic control element together with the other functions of a multiple directional control valves.
Description
Technical field
The utility model belongs to the hydraulic control device technical field, be specifically related to a kind of bidirectional balanced formula load feedback multiple directional control valve group, it is to use the special assembly that hydraulics is controlled the moving direction and the movement velocity of fluid, can be widely used in truck crane, truck-mounted crane, pile pressing machine, rig, high-altitude operation vehicle, fork truck, environmental sanitation car and other need make the hydraulic machinery of vertical motion or oblique movement or elevator elevating movement.
Background technique
The employed oil circuit form of existing selector valve is; Before the multiple directional control valve actuator port, install independent unidirectional equilibrium valve additional and come Compositional balance formula load feedback control oil channel, also will add a cover in addition as the two-way control of need.The defective of this selector valve is that volume is big, and the pipeline connection reliability is poor, and the external leakage possibility strengthens, and feedback sensitivity lags behind, and installs limited and inconvenient.Inquire about similar design and the product that does not still have with bidirectional balanced formula load feedback multiple directional control valve from data both domestic and external and product at present.
Summary of the invention
In order to overcome the deficiency of existing control oil channel form, the disclosed balanced type load feedback of the utility model multiple directional control valve group adopts the balanced type load feedback valve that will improve after designing directly to be integrated in the commutation valve body, combine together with original commutation function, constitute balanced type load feedback control oil channel and have the function of Pilot operated check valve.
The utility model is specifically by the following technical solutions:
A kind of balanced type load feedback multiple directional control valve group, it is that balanced type load feedback valve directly is integrated in the commutation valve body, combines together with the commutation valve body, constitutes balanced type load feedback control oil channel.The valve body of described balanced type load feedback multiple directional control valve group has top main aperture and bottom main aperture, and slide valve assembly is contained in the main aperture of bottom, and is sealed at both ends; Balanced type load feedback valve is contained in the top main aperture of valve body, and is sealed at both ends; On the bi-side of described valve body, have public oil inlet hole, special pressure oilhole, public spill port and be connected screw; The oil duct of commutation position communicates with the advancing of balanced type load feedback valve, oil circuit respectively in the valve body; Valve body top has actuator port, is connected with the hydraulic actuator of being controlled.
By handling reversing slide valve realization oil circuit conversion and the adjusting of operating cylinder or elevator oil hydraulic motor rising or falling speed being controlled.Owing to have the hydraulic control overload protection function; guaranteed the sealing of the driving fit line between one-way valve under the effect of the spring of unblanking and mobile valve pocket when multiple directional control valve is in the neutral position; closed the oil back chamber that connects operating cylinder or elevator oil hydraulic motor, operating cylinder or elevator oil hydraulic motor can not glide voluntarily under the rated load effect.When surpassing rated load, return pressure acts on and overcomes the spring pressure of unblanking on the useful area of mobile valve pocket and make the driving fit line crack, eliminates the overload factor under the situation of slow speed limit, guarantees the Security of complete machine; When producing hydraulic shock, driving fit line moment opens, and eliminates the surge pressure peak value, guarantees hydraulic system safety.
This multiple directional control valve group have delicate structure, configuration rationally, feedback is sensitive, volume is little, in light weight, it is convenient to safeguard, can realize that the step-less adjustment of movement velocity, control accuracy are higher, easy for installation, the advantage of applied range.
1, defectives such as to add inconvenience and volume that equilibrium valve brings big, and the pipeline connection reliability is poor, and feedback sensitivity lags behind, and installation conditions is limited have been changed;
2, changed original multiple directional control valve because of there being intrinsic leakage-gap, when reversing slide valve was in the neutral position, rated load can glide voluntarily, and operating mode is caused security risk and the relatively poor defective of speed governing sensitivity.
This balanced type load feedback multiple directional control valve group can be widely used in truck crane, truck-mounted crane, pile pressing machine, high-altitude operation vehicle, fork truck, refuse collection vehicle and other place that need carry out rising or falling speed control to the hydraulic actuator of vertical motion or oblique movement and need overload protection.
Description of drawings
Figure 1 shows that hydraulic work schematic diagram of the present utility model;
Figure 2 shows that the longitudinal section tectonic maps of bidirectional balanced formula load feedback multiple directional control valve group example of the present utility model.
Wherein, 1-guiding valve, 2-support, the 3-valve body, 4-first screw plug, 18-second screw plug, 5-first one-way valve, 17-second one-way valve, 6 first moves valve pocket, and 16-second moves valve pocket, and 7-first is valve pocket fixedly, 15-second is valve pocket fixedly, 8-first check valve spring, 14-second check valve spring, 9-first collar, 13-second collar, 10-first spring of unblanking, 12-second unblank spring, the two-way joint of 11-, 19-baffle plate, 20-end cap, 21-Returnning spring, 22-spring seat, 23-locating column.
Embodiment
According to Figure of description the technical solution of the utility model is described in further detail below.
Referring to Fig. 2, the valve body 3 of this bidirectional balanced formula load feedback multiple directional control valve group has top main aperture and bottom main aperture, and slide valve assembly is contained in the main aperture of bottom, and balanced type load feedback valve is contained in the top main aperture of valve body.Wherein the assembling of slide valve assembly is to utilize the outside thread of locating column 23 that spring seat 22, Returnning spring 21 are connected as one with the internal thread of guiding valve 1, and in the bottom main aperture of the valve body 3 of packing into, two ends are loaded onto end cap 20 and support 2 respectively, and the Sealing of packing into.The main dress of balanced type load feedback valve is: first fixedly valve pocket 7 and second fixedly the endoporus of valve pocket 15 be respectively charged into first and move valve pocket 6 and second and move valve pocket 16, move in the endoporus that valve pocket 6 and second moves valve pocket 16 first and to reinstall first one-way valve 5 and second one-way valve 17, be respectively charged into first check valve spring 8 and second one-way valve 14 again, and be separately fixed on first one-way valve 5 and second one-way valve 17 with collar, be respectively charged into first spring 10 and second spring 12 of unblanking of unblanking again, first the unblank end of spring 12 of spring 10 and second of unblanking is against first respectively and moves valve pocket 6 and second and move on the valve pocket 16, the other end is against respectively on the two-way joint 11, the two ends outside thread of two-way joint 11 respectively with first fixedly valve pocket 7 and second fixedly the internal thread of valve pocket 15 connect as one, in the top main aperture of the whole valve body 3 of packing into, two ends are loaded onto first screw plug 4 and second screw plug 18 and the Sealing of packing into respectively then.On the bi-side of valve body 3, have public oil inlet hole, special pressure oilhole, public spill port, connect screw, with realize the combination between the valve body and publicly advance, transmission and the introducing of this valve group pressure oil and the drainage of oil return of drainback passage.In the valve body lower portion main aperture, be designed to the arrangement of nine slot type oil ducts, to realize the commutation function of multiple slide valve function.The oil duct of commutation position in the valve body is communicated with the advancing of balanced type load feedback valve, oil circuit respectively, to realize balanced type load feedback function.Valve body top has actuator port, with realize with the hydraulic actuator of being controlled between be connected.
In conjunction with Fig. 1 and Fig. 2, when reversing slide valve 1 moves right, pressure oil is crossed second channel T2 from the logical T1 of first passage and is entered third channel T3 and promote first one-way valve, 5 compressions, first spring 8 and form opening to left movement, and pressure oil enters oil cylinder rodless cavity through four-way T4 and left end actuator port A.The cylinder rod chamber oil return enters the five-way road through right-hand member actuator port B, its return pressure acts on the end face of second one-way valve 17, promote second one-way valve 17 and drive second to move valve pocket 16 compression second check valve springs 14 and second spring 12 of unblanking and move to the end left, make second to move valve pocket 16 and second and fixedly form the gap between the valve pocket 15.While five-way road T5 return pressure acts on second and moves on the effective push area of valve pocket 16 and 17 driving fits place of second one-way valve, entering second with third channel T3 pressure oil by the tenth passage T10 through first one-way valve, 5 endoporus and two-way joint oil duct moves in valve pocket 16 and second gap that fixedly valve pocket 15 forms, utilize thrust that the second front-back product moment that moves valve pocket 16 produces and making a concerted effort of forming, promoting second moves valve pocket 16 compressions second spring 12 of unblanking and continues left to move, second driving fit place of moving the valve pocket 16 and second one-way valve 17 is thrown off form opening, the cylinder rod chamber oil return enters valve body the 8th passage T8 oil return by this open channels through the reversing slide valve opening, realizes the oil cylinder upstroke.When five-way road T5 return pressure increases, to third channel T3 working pressure is increased by load feedback, second move valve pocket 16 compression second unblank spring 12 make a concerted effort increase, the second driving fit place opening that moves the valve pocket 16 and second one-way valve 17 is strengthened, thereby return oil pressure is reduced, and the oil cylinder movement velocity is accelerated.When compression second unblank spring 12 make a concerted effort to reduce the time, second moves valve pocket 16 unblanks under the thrust of spring 12 to reduce with the driving fit place opening of second one-way valve 17 second, the oil cylinder movement velocity reduces.Can regulate the opening of oil inlet and oil return flow by the move distance of handling reversing slide valve, five-way road T5, four-way T4 oil inlet and oil return pressure are changed, make to act on second and move changing with second equilibrium of forces of unblanking spring 12 with joint efforts on the valve pocket 16, be implemented under the load behavior stepless speed regulation oil cylinder upstroke speed.
When reversing slide valve is moved to the left, pressure oil is crossed the 7th passage T7 from the logical T1 of first passage and is entered the 8th passage T8 and promote second one-way valve, 17 compressions second spring 12 of unblanking and move right the formation opening, and pressure oil enters cylinder rod chamber through five-way road T5 and right-hand member actuator port B.The oil cylinder rodless cavity oil return enters four-way T4 by left end actuator port A, its return pressure acts on the end face of first one-way valve 5, promote first one-way valve 5 and drive first to move valve pocket 6 compression first check valve springs 14 and first spring 10 of unblanking and move right on earth, make first to move valve pocket 6 and first and fixedly form the gap between the valve pocket 7.While four-way T4 return pressure acts on first and moves on the effective push area of valve pocket 6 and 5 driving fits place of first one-way valve, entering first with the 6th passage T6 pressure oil by the 11 passage T11 through second one-way valve, 17 endoporus and two-way joint 11 moves in valve pocket 6 and first gap that fixedly valve pocket 7 forms, utilize thrust that the first front-back product moment that moves valve pocket 6 produces and making a concerted effort of forming, promoting first moves valve pocket 6 compressions first spring 10 of unblanking and continues to the right to move, first driving fit place of moving the valve pocket 6 and first one-way valve 5 is thrown off form opening, the oil cylinder rodless cavity oil return enters valve body the 9th passage T chamber oil return by this open channels through the reversing slide valve opening, realizes the oil cylinder downward movement.When four-way T4 return pressure increases, six passage T6 increase working pressure by load feedback to the, first move valve pocket 6 compression first unblank spring 10 make a concerted effort increase, the first driving fit place opening that moves the valve pocket 6 and first one-way valve 5 is strengthened, thereby return oil pressure is reduced, and the oil cylinder movement velocity is accelerated.When compression first unblank spring 10 make a concerted effort to reduce the time, first moves valve pocket 6 unblanks under the thrust of spring 10 to reduce with the driving fit place opening of first one-way valve 5 first, the oil cylinder movement velocity reduces.Can regulate the opening of oil inlet and oil return flow by the move distance of handling reversing slide valve, four-way T4, five-way road oil inlet and oil return pressure are changed, make to act on first and move changing with first equilibrium of forces of unblanking spring 10 with joint efforts on the valve pocket 6, be implemented under the load behavior stepless speed regulation oil cylinder downward movement speed.
Be illustrated in figure 2 as the longitudinal section tectonic maps of the disclosed bidirectional balanced formula load feedback multiple directional control valve group example of the utility model.
Form commutation function by guiding valve 1, support 2, valve body 3, locating column 23, Returnning spring 21, spring seat 22, end cap 20, O shape circle, dust ring, by the change in location between the flow path groove in sealed step on the guiding valve 1 and the valve body 3, realize to advance, the unlatching of oil return flow path direction or close; By valve body 3 and first and second fixedly valve pocket 7 and 15, first and second move valve pocket 6 and 16, first and second one-way valves 5 and 17, two-way joint 11, first and second check valve springs 8 and 14, the first and second balanced type load feedback function that spring 10 and 12, first and second screw plugs 4 and 18, O shape circle form of unblanking.By adjusting to commutation sliding valve movement distance, under the effect of control fluid, make and act on the equilibrium of forces that movement of valve puts and change by pressure feedback, make driving fit line between one-way valve and the mobile valve pocket produce the variation of openings of sizes or close fully, to realize the control of load movement speed and to guarantee the steady safe operation of load.
(reversing slide valve 1 oil inlet and oil return mouth under the effect of Returnning spring 21 is in closure state when multiple directional control valve is in the neutral position, pressure oil can not be to this valve group generation function), move driving fit line sealing between valve pocket 6 and 16 at first and second unblank first and second one-way valves 5 and 17 and first and second under the effect of spring 10 and 12, closed the oil back chamber that connects operating cylinder, operating cylinder can not glide voluntarily under the rated load effect.When surpassing rated load, return pressure acts on first and second and moves and overcome first and second spring forces of unblanking spring 10 and 12 on the useful area of valve pocket 6 and 16 and make the driving fit line crack, under the situation of slow speed limit, eliminate the overload factor, guarantee the Security of complete machine; When producing hydraulic shock, driving fit line moment opens, and eliminates the surge pressure peak value, guarantees security of system.
When multiple directional control valve is in the neutral position, for improving under the severe duty, because of causing oil cylinder, balanced type load feedback valve fault do not have the danger that control is glided fast, adopt O type reversing slide valve sealed step place to add the design of throttling groove, both guaranteed to be in unloading condition behind the one-way valve of balanced type load feedback valve, can when breaking down, balanced type load feedback valve guarantee that load low speed steadily descends, and eliminates safe hidden trouble again.
Claims (4)
1. balanced type load feedback multiple directional control valve group is characterized in that: described multiple directional control valve group is that balanced type load feedback valve directly is integrated in the commutation valve body, constitutes balanced type load feedback control oil channel; The valve body (3) of described balanced type load feedback multiple directional control valve group has top main aperture and bottom main aperture, and slide valve assembly is contained in the main aperture of bottom, and is sealed at both ends; Balanced type load feedback valve is contained in the top main aperture of valve body (3), and is sealed at both ends; On the bi-side of described valve body (3), have public oil inlet hole, special pressure oilhole, public spill port and be connected screw; The oil duct of commutation position communicates with the advancing of balanced type load feedback valve, oil circuit respectively in the valve body (3); Valve body (3) top has actuator port, is connected with the hydraulic actuator of being controlled.
2. balanced type feedback multiple directional control valve group according to claim 1, it is characterized in that, described slide valve assembly comprises reversing slide valve (1), locating column (23), Returnning spring (21), spring seat (22) and end cap (20), the outside thread of described locating column (23) connects as one spring seat (22), Returnning spring (21) with the internal thread of reversing slide valve (1), pack in the bottom main aperture of valve body (3), two ends are loaded onto end cap (20) and support (2) respectively, and the Sealing of packing into.
3. balanced type feedback multiple directional control valve group according to claim 1 and 2, it is characterized in that, described balanced type load feedback valve is by the first fixing valve pocket (7), the second fixing valve pocket (15), first moves valve pocket (6), second moves valve pocket (16), first one-way valve (5), second one-way valve (17), two-way joint (11), first check valve spring (8), second check valve spring (14), first spring (10) of unblanking, second spring (12) of unblanking, first screw plug (4) and second screw plug (18) are formed, first fixedly valve pocket (7) and second fixedly the endoporus of swivel nut (15) be respectively charged into first and move valve pocket (6) and second and move valve pocket (16), move in the endoporus that valve pocket (6) and second moves valve pocket (16) first first one-way valve (5) and second one-way valve (17) are housed, first check valve spring (8) and second check valve spring (14) are separately fixed on first one-way valve (5) and second one-way valve (17) with collar, in first one-way valve (5) and second one-way valve (17), be respectively charged into first spring (10) and second spring (12) of unblanking of unblanking again, first the unblank end of spring (12) of spring (10) and second of unblanking is against first respectively and moves valve pocket (6) and second and move on the valve pocket (16), the other end is against respectively on the two-way joint (11), the two ends outside thread of two-way joint (11) respectively with first fixedly valve pocket (7) and second fixedly the internal thread of valve pocket (15) connect as one, the balanced type load feedback valve of Gou Chenging is enclosed in the top main aperture of valve body (3) by integral body thus, two ends are equipped with first screw plug (4) and second screw plug (18) respectively, and are incorporated with Sealing.
4. balanced type feedback multiple directional control valve group according to claim 3 is characterized in that the layout of design nine slot type oil ducts in the bottom main aperture of described valve body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201271838U CN201560993U (en) | 2009-04-30 | 2009-04-30 | Balanced type load backfeed multiple directional control valve block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201271838U CN201560993U (en) | 2009-04-30 | 2009-04-30 | Balanced type load backfeed multiple directional control valve block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560993U true CN201560993U (en) | 2010-08-25 |
Family
ID=42626139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201271838U Expired - Fee Related CN201560993U (en) | 2009-04-30 | 2009-04-30 | Balanced type load backfeed multiple directional control valve block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201560993U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949396A (en) * | 2010-09-30 | 2011-01-19 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with return oil stepless speed control function |
| CN104495709A (en) * | 2015-01-20 | 2015-04-08 | 宁波高新协力机电液有限公司 | Loading pressure feedback proportional multi-way valve for electric forklift |
-
2009
- 2009-04-30 CN CN2009201271838U patent/CN201560993U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949396A (en) * | 2010-09-30 | 2011-01-19 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with return oil stepless speed control function |
| CN104495709A (en) * | 2015-01-20 | 2015-04-08 | 宁波高新协力机电液有限公司 | Loading pressure feedback proportional multi-way valve for electric forklift |
| CN104495709B (en) * | 2015-01-20 | 2016-11-30 | 宁波高新协力机电液有限公司 | Load pressure feedback proportional multi-way valve on electri forklift |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201560992U (en) | Pilot-operated hydraulic lock multi-way directional valve set | |
| CN102562699B (en) | Balance valve, hydraulic cylinder telescopic control loop and crane | |
| CN201057181Y (en) | Balancing brake valve | |
| CN100441885C (en) | Hydraulic balance valve capable of automatically adapting load change | |
| CN203856793U (en) | Balance valve and hydraulic cylinder telescoping control loop with same | |
| CN105822618B (en) | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way valve | |
| CN202732526U (en) | Combined hydraulic balance valve | |
| CN101865171A (en) | Thread cartridge balanced valve | |
| CN201317637Y (en) | Turning control assembly of hydraulic truck crane | |
| CN104533863B (en) | Crane rotation system control valve | |
| CN2682235Y (en) | Load sensing pressure compensation multi-port valve | |
| CN102128284A (en) | Pressure-reduction type balance hydraulic lock | |
| CN201560993U (en) | Balanced type load backfeed multiple directional control valve block | |
| CN204476899U (en) | A kind of crane rotation system control valve | |
| CN101949397A (en) | Balanced valve bank of derricking cylinder system | |
| CN201232784Y (en) | Load holding valve | |
| CN101446307B (en) | Mechanical feedback plug-in mounting type proportional throttle valve system | |
| CN203655762U (en) | Split type pilot load control valve | |
| CN108775431A (en) | Balanced valve | |
| CN103015473A (en) | Priority control method of excavator and movable arm to rotation and priority valve | |
| CN103321979A (en) | Handle pilot valve capable of improving excavator inching operation | |
| CN205779975U (en) | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way valve | |
| CN202023780U (en) | Pressure-reducing type balance hydraulic lock | |
| CN202108804U (en) | Hydraulic amplitude conversion system and balance valve set thereof | |
| CN206988212U (en) | A kind of balanced valve suitable for crane amplitude variation oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Luzhou Zhongda Science & Technology Hydraulic Parts Co., Ltd. Assignor: Luzhou Jiangyang Changjiang Hydraulic Pressure Technology Co., Ltd. Contract record no.: 2012510000097 Denomination of utility model: Balanced type load backfeed multiple directional control valve block Granted publication date: 20100825 License type: Exclusive License Record date: 20121012 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20160430 |