CN202531914U - Electro-hydraulic multi-channel reversing valve with floating type manual pull rod in reversing valve sheet - Google Patents
Electro-hydraulic multi-channel reversing valve with floating type manual pull rod in reversing valve sheet Download PDFInfo
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- CN202531914U CN202531914U CN 201220213711 CN201220213711U CN202531914U CN 202531914 U CN202531914 U CN 202531914U CN 201220213711 CN201220213711 CN 201220213711 CN 201220213711 U CN201220213711 U CN 201220213711U CN 202531914 U CN202531914 U CN 202531914U
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- valve
- reversing
- end cap
- switching
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Abstract
The utility model discloses an electro-hydraulic multi-channel reversing valve with a floating type manual pull rod in a reversing valve sheet. The electro-hydraulic multi-channel reversing valve comprises an oil inlet valve sheet, the reversing valve sheet and an oil return valve sheet, wherein the reversing valve sheet comprises a reversing valve body, a first end cover and a second end cover; the manual pull rod is arranged in a reversing oil channel in an inner cavity of the first end cover; the left end of a valve rod of the reversing valve sheet extends into the reversing oil channel of the first end cover; a floating sleeve is arranged at the left end of the valve rod of the reversing valve sheet; the valve rod is connected with the floating sleeve through a thread pair; a cavity is formed at the left end of the floating sleeve; the right end of the manual pull rod is embedded into the cavity at the left end of the floating sleeve; the right end of the manual pull rod is in clearance fit with the cavity of the floating sleeve; a reversing shifting block is fixedly connected to the left end of the manual pull rod; and a reversing handle is fixedly connected to the reversing shifting block. The electro-hydraulic multi-channel reversing valve has the advantages of manual reversing operation, simple and convenient reversing operation and the like.
Description
Technical field
The utility model relates to the electric liquid multiple directional control valve of establishing floating type manual draw bar in a kind of Reversing valve plate.
Background technique
Electricity liquid multiple directional control valve is the combination of solenoid directional control valve and hydraulic control multiple directional control valve, and it is the action that realizes selector valve with solenoid directional control valve control guide oil, the control valve of conversion fluid flow direction.Electricity liquid multiple directional control valve and pilot operated directional control valve mainly are used in flow and surpass in the hydraulic system of solenoid directional control valve proper functioning allowed band, thereby promptly small flow controlling large flow is controlled the action of executive component, or the flow direction of fluid is controlled.
In the prior art, electric liquid multiple directional control valve mainly is made up of oil-feed valve block, Reversing valve plate and oil return valve block.The manual reverse of direction that does not have manual draw bar in the Reversing valve plate has only the commutation function of hydraulic control, does not possess the function of manual reverse of direction; In case the hydraulic control disabler just can't realize commutation function, do not possess manual control, the incorporate function of hydraulic control, control device is single, the demand of incompatibility system.
The model utility content
The utility model is the deficiency that exists in the above-mentioned prior art for avoiding, and the electric liquid multiple directional control valve of establishing floating type manual draw bar in a kind of Reversing valve plate is provided, can manually-operable commutating.
The utility model adopts following technological scheme for the technical solution problem.
Establish the electric liquid multiple directional control valve of floating type manual draw bar in the Reversing valve plate; Comprise oil-feed valve block, Reversing valve plate and oil return valve block; Its structural feature is, said Reversing valve plate comprises switching-over valve body, first end cap and second end cap, and first end cap and second end cap are located at the switching-over two ends of valve body respectively; Be equipped with switching-over oil duct and end cap back oil road in the inner chamber of said first end cap and second end cap, said end cap back oil road is connected with valve body guide oil back oil road; Be provided with manual draw bar in the switching-over oil duct in the inner chamber of said first end cap; The valve rod left part of said Reversing valve plate is stretched in the switching-over oil duct of said first end cap; Left end at the valve rod of said Reversing valve plate is provided with floating bushing; The left part of said valve rod is provided with outside thread, and the internal surface of floating bushing is provided with internal thread, and valve rod is connected through screw pair with floating bushing; The left part of floating bushing is a cavity, and the right part of manual draw bar is embedded in the cavity of floating bushing left part, is Spielpassung between the right part of said manual draw bar and the cavity of said floating bushing; Be fixedly connected with the switching-over pulling block on the left part of said manual draw bar, said reversing handle is fixedly connected on the said switching-over pulling block.
Compared with present technology, the utility model beneficial effect is embodied in:
Manual draw bar is set on end cap, can realizes manual reverse of direction, thereby the selector valve of the utility model has the manual reverse of direction operating function through manual draw bar, through lever operated switching-over, the switch operation simple and fast.
The electric liquid multiple directional control valve of the utility model, advantage such as having can the manually-operable switching-over, switch operation is simple and convenient.
Description of drawings
Fig. 1 is the hydraulic schematic diagram of the electric liquid multiple directional control valve of the utility model.
Fig. 2 is the plan view of the electric liquid multiple directional control valve of the utility model.
Fig. 3 is the left view of the electric liquid multiple directional control valve of the utility model.
Fig. 4 is the plan view of oil-feed valve block of the electric liquid multiple directional control valve of the utility model.
Fig. 5 is the left view of oil-feed valve block of the electric liquid multiple directional control valve of the utility model.
Fig. 6 is the A-A sectional view among Fig. 5.
Fig. 7 is the C-C sectional view among Fig. 5.
Fig. 8 is the sectional view of Reversing valve plate of the electric liquid multiple directional control valve of the utility model.
Fig. 9 is the partial enlarged drawing among Fig. 8.
Figure 10 is the sectional view of the throttling plug screw among Fig. 8.
Label in accompanying drawing 1～accompanying drawing 10: 1 oil-feed valve block, 2 Reversing valve plates, 3 oil return valve blocks, 4 interflow valve blocks, 5 oil-feed valve bodies, 6 safety valves, 7 filler openings; 8 main oil gallerys, 9 work oil ducts, 10 first oil ducts, 11 main guide's oil ducts, 12 first guide's oil ducts, 13 second guide's oil ducts, 14 reduction valve; 15 guiding valves, 16 one-way valves, 17 switching-over valve bodies, 18 first end caps, 19 second end caps, 20 solenoid valves; 21 switching-over oil ducts, 22 end cap back oil roads, 23 valve body guide oil back oil roads, 24 manual draw bars, 25 valve rods, 26 floating bushings; 27 switching-over pulling blocks, 28 reversing handles, 29 electromagnet, 30 electromagnetic valve cores, 31 electromagnetism valve pockets, 32 solenoid valve springs; 33 electromagnetism valve pockets, 34 auxiliary filler openings, 35 throttling plug screws, 36 throttle orifices, 37 hydraulic control hydraulic fluid ports, 38 end cap guide oil oil input channels.
Alphabetic flag in Fig. 1～accompanying drawing 10: the P filler opening, P2 assists filler opening, PG pressure taps, PG2 second pressure taps, T-return opening, A1～A5 actuator port, B1～B5 actuator port.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 10, establish the electric liquid multiple directional control valve of floating type manual draw bar in the Reversing valve plate, comprise oil-feed valve block 1, Reversing valve plate 2 and oil return valve block 3.Said Reversing valve plate 2 comprises that switching-over valve body 17, first end cap 18 and second end cap, 19, the first end caps 18 and second end cap 19 be located at the two ends of the valve body 17 that commutates respectively; Be equipped with switching-over oil duct 21 and end cap back oil road 22 in the inner chamber of said first end cap 18 and second end cap 19, said end cap back oil road 22 is connected with valve body guide oil back oil road 23; Be provided with manual draw bar 24 in the switching-over oil duct 21 in the inner chamber of said first end cap 18; Valve rod 25 left parts of said Reversing valve plate 2 are stretched in the switching-over oil duct 21 of said first end cap 18; Left end at the valve rod 25 of said Reversing valve plate 2 is provided with floating bushing 26; The left part of said valve rod 25 is provided with outside thread, and the internal surface of floating bushing 26 is provided with internal thread, and valve rod 25 and floating bushing 26 are connected through screw pair; The left part of floating bushing 26 is a cavity, and the right part of manual draw bar 24 is embedded in the cavity of floating bushing 26 left parts, is Spielpassung between the cavity of the right part of said manual draw bar 24 and said floating bushing 26; Be fixedly connected with switching-over pulling block 27 on the left part of said manual draw bar 24, said reversing handle 28 is fixedly connected on the said switching-over pulling block 27.
Through handle 28 pulling pull bars 24, and then drive valve rod 25 action that commutates, realized the operation of manual reverse of direction.
Said oil-feed valve block 1 comprises oil-feed valve body 5 and safety valve 6; Said safety valve 6 is installed on the oil-feed valve body 5; Said oil-feed valve body 5 is provided with oil inlet P 7, is provided with main oil gallery 8, work oil duct 9 and first oil duct 10 in the oil-feed valve body 5, and said main oil gallery 8 is connected with filler opening 7, and the said work oil duct 9 and first oil duct 10 all are connected with main oil gallery 8; Said first oil duct 10 is connected with guide's oil duct, and said guide's oil duct comprises main guide's oil duct 11, first guide's oil duct 12 and second guide's oil duct 13, and said main guide's oil duct 11 is provided with reduction valve 14 with said first oil duct 10 joints; Establish guiding valve 15 in the said work oil duct 9, said work oil duct 9 is connected with drainback passage through safety valve 6.External hydraulic oil is divided into two-way through the main oil gallery that oil inlet P P gets into the oil-feed valve block from main oil gallery: lead up to guiding valve entering work oil duct, another road gets into guide's oil duct through reduction valve.Hydraulic oil through guiding valve entering work oil duct flows into each Reversing valve plate, when valve rod commutates, gives actuator port A1-A5, B1-B5 fuel feeding; When oil pressure surpassed the setting pressure of safety valve, safety valve was opened off-load, made hydraulic oil pass through safety valve from the return opening oil return, thereby avoided the valve internal pressure too high, the safety of protection hydraulic system.The hydraulic oil that flows into first oil duct flows into guide's oil duct through reduction valve; And then be divided into two-way and flow into first guide's oil duct and second guide's oil duct respectively; Hydraulic oil flows into the two ends of Reversing valve plate respectively through first guide's oil duct and second guide's oil duct, be used for the guide oil as the control switching-over.The guide oil of first guide's oil duct or second guide's oil duct gets into the solenoid valve oil input channel through the hydraulic control hydraulic fluid port 37 of Reversing valve plate; Make guide oil get into the switching-over oil duct in the Reversing valve plate; Guide oil control Reversing valve plate switching-over during the electromagnet energising, the valve rod return of Reversing valve plate during outage.During the solenoid valve outage, the guide oil in guide's oil duct just can't get into the switching-over oil duct, and the pressure in guide's oil duct will increase, and when the pressure in the guide oil road increased to predetermined value, reduction valve will cut out, and no longer in guide's oil duct, injected guide oil.Through the magnet control electromagnetic valve core, make guide oil get into the switching-over oil duct of Reversing valve plate end cap, make that perhaps the hydraulic oil in the switching-over oil duct flows to oil return inlet T through back oil road, satisfy the switching-over of the valve rod of Reversing valve plate.Because self oil-feed of oil-feed valve block is divided into two-way, and one the tunnel is the actuator port fuel feeding of Reversing valve plate, the one tunnel is that the Reversing valve plate switching-over provides guide oil, thereby need not to add guide's oil pump and oil pipe, has simplified the structure of hydraulic system, has reduced system cost.In addition, can off-load when the valve internal pressure is too high through safety valve, thus can protect the safety of hydraulic system.The guide oil that reduction valve is told gets into guide's oil duct; When the pressure oil pressure in the guide oil road reaches certain numerical value; The spool of reduction valve will block up the connection mouth between first oil duct and the guide's oil duct; No longer include guide oil and get into guide's oil duct, thereby define the maximum pressure and the fuel feeding of guide oil, also can not cause the waste of guide's hydraulic pressure oil white stream simultaneously.In case guide oil has loss in the course of the work, when causing the pressure decline of guide oil, reduction valve can be opened the connection mouth between first oil duct and the guide's oil duct again, replenishes guide oil, reaches the just stifled once more connection mouth of going up of predefined value until guide oil pressure.Thereby; Can change the side-to-side movement of control reduction valve spool through the oil pressure of guide oil; And then control switching on and off between first oil duct and the guide's oil duct, thereby replenishing and stopping of control guide oil supplies, and realizes the pressure limiting of guide oil and the function requirement that minimum discharge guarantees guide's oil circuit.
Be equipped with solenoid valve 20 on first end cap 18 and second end cap 19; Said solenoid valve 20 comprises electromagnet 29, electromagnetic valve core 30, electromagnetism valve pocket 31 and solenoid valve spring 32; Electromagnet 29 on said first end cap 18 is located at the left part of first end cap 18, and electromagnetic valve core 30 is located in the electromagnetism valve pocket 33 of first end cap 18; Said electromagnetism valve pocket 31 all is sheathed on the said electromagnetic valve core 30 with solenoid valve spring 32; Said electromagnetism valve pocket 33 is connected with said switching-over oil duct 21, and said electromagnetism valve pocket 33 is connected with end cap guide oil oil input channel 38 and end cap back oil road 22.Shown in Fig. 8-9, the two ends of Reversing valve plate are equipped with end cap, and promptly above-mentioned first end cap and second end cap are respectively equipped with a solenoid valve on two end caps, are used for the switching-over control at Reversing valve plate two ends.On first end cap, manual draw bar is set, in the inner chamber that is stuck in floating bushing of manual draw bar right-hand member, manual draw bar is a cylindrical body, and floating bushing is a cylindrical shape.The inner chamber right portions of floating bushing is a thread section, cooperates with the outside thread of valve rod left end, makes floating bushing and valve rod be fixedly connected.Floating bushing inner chamber left side is a cavity, and the pull bar right-hand member is provided with boss, and wherein end diameter is bigger, may be stuck in just in the inner chamber of floating bushing.The manual draw bar outer circumferential face cooperates for conventional axle-interporal lacuna with the floating bushing inner peripheral surface, and matching gap is 18dmm～22dmm (decimillimeter), is the best with 20 dmm.Through adopting the mode of this Spielpassung, between manual draw bar and end cap, valve rod and the valve body stuck phenomenon can not take place yet, between manual draw bar and the valve rod stuck phenomenon can not take place yet.The left end of manual draw bar is connected with the switching-over pulling block, has fixed handle on the switching-over pulling block, so can spur manual draw bar through handle, and then drive the valve rod switching-over.Same manual reverse of direction mechanism also can be arranged on second end cap.
Electromagnetic valve core is positioned at the connection mouth place of two guide's oil ducts and drainback passage and switching-over oil duct just; Being communicated with and disconnection between the action control guide oil duct through electromagnetic valve core and switching-over oil duct, drainback passage and the switching-over oil duct, thus the fuel feeding of guide oil, the oil return of the oil duct that commutates controlled.During the electromagnet no electric circuit, blocked between two guide's oil ducts and the switching-over oil duct, communicated between switching-over oil duct and the drainback passage, the hydraulic oil oil return in the switching-over oil duct, valve rod is failure to actuate; At this moment, because no oil pressure in the switching-over oil duct can carry out manual reverse of direction through manual draw bar pulling valve rod.When electromagnet was switched on, electromagnetic valve core moved to right, and two guide's oil ducts communicate with the switching-over oil duct, and guide's oil duct blocks between switching-over oil duct and the drainback passage to switching-over oil duct fuel feeding, valve rod switching-over this moment.
Can realize liquid controlled reversing through solenoid valve, can realize manual reverse of direction, thereby the selector valve of the utility model has manually and two kinds of reversing modes of hydraulic control, make hand hydraulically controlled function integration through manual draw bar.
Described electric liquid multiple directional control valve also is provided with interflow valve block 4; Said interflow valve block 4 is arranged between two Reversing valve plates 2; Said interflow valve block 4 is provided with auxiliary filler opening 34.As shown in Figure 2, there are two Reversing valve plates in the left side of interflow valve block, and there are three Reversing valve plates on the right side of interflow valve block.When the actuator port output flow of right side Reversing valve plate is not enough; Can be equipped with oil feed pump in addition; Be auxiliary oil inlet P 2 fuel feeding, thereby can improve the output flow of the actuator port of Reversing valve plate, make the actuator port output flow of selector valve to adjust; Improve the supply capability of the work of Reversing valve plate, improved the adaptability of Reversing valve plate.The oil circuit of auxiliary oil inlet P 2 is connected through the vent line of one-way valve 16 with two Reversing valve plates in valve block left side, interflow, to avoid assisting two the Reversing valve plate refluence fuel feeding of the oil-feed meeting of oil inlet P 2 to valve block left side, interflow.The oil circuit of auxiliary oil inlet P 2 is connected with drainback passage through safety valve 6; When oil pressure surpasses the setting pressure of safety valve, safety valve is opened off-load, makes hydraulic oil pass through safety valve from the return opening oil return; Thereby avoid the valve internal pressure too high, the safety of protection hydraulic system.
In said Reversing valve plate 2, in end cap back oil road 22, be provided with throttling plug screw 35; The outer circumferential face of said throttling plug screw 35 is an outside thread, and throttling plug screw 35 is provided with along the throttle orifice that axially runs through said throttling plug screw 35 36 of said throttling plug screw 35.Like Fig. 8-9, said throttling plug screw is a cylindrical shape, and outer circumferential face is an outside thread, matches with the internal thread of back oil road through outside thread, screws within the back oil road.Like Figure 10, the centre of throttling plug screw is provided with and the axial identical throttle orifice of plug screw, and an end of throttle orifice is interior hexagon, with hexagon wrench the throttling plug screw is installed during in order to assembling.In the end cap back oil road of two end caps of Reversing valve plate, be equipped with a throttling plug screw, the throttling plug screw is arranged in the end cap back oil road, can communicate with valve body guide oil back oil road through guide's back oil road.In the selector valve working procedure, Reversing valve plate usually needs switching-over before and after the opposite, when promptly being full of hydraulic oil in the switching-over oil duct of possibility one side end cap, needs the electromagnetic valve valve rod switching-over of opposite side.Such as, when in the switching-over oil duct of first end cap, being full of hydraulic oil, the outage of the solenoid valve of first end cap, the switching-over oil duct is connected with the end cap back oil road in first end cap, and the guide oil of first end cap is blocked.At this moment, the solenoid valve of second end cap energising, the guide oil of second end cap flows in its switching-over oil duct, the valve rod switching-over that moves to left.If do not have the throttling plug screw in the end cap back oil road of first end cap; The switching-over oil duct of first end cap communicates with the return opening undamped so; Oil return speed is very fast, and valve rod moves to left fast, and the switching-over action is comparatively swift and violent; Can bigger impact be arranged to executive component such as the oil cylinder or the motor etc. of system's control, damage actuator easily and can't realize the fine motion demand of mechanism.After in the first end cap back oil road, being provided with the throttling plug screw, in the process that valve rod moves to left, the hydraulic oil of the switching-over oil duct of first end cap gets into valve body guide oil back oil road after through the throttling plug screw; Because the throttling action of throttling plug screw, the hydraulic oil of the switching-over oil duct of first end cap are oil returns gradually, make that moving of valve rod is comparatively slow; The switching-over action is comparatively releived; Make that the flow system flow impact force is less, thereby satisfy the fine motion demand of actuator, and prolonged the working life of system.
As shown in Figure 1, pressure oil a is divided into two-way b and c from oil inlet P.Wherein the b road gets into each Reversing valve plate through guiding valve, and b road pressure oil is used for when valve rod commutates, giving actuator port A1 ~ A5, B1 ~ B5 fuel feeding.When b road pressure oil surpasses the pressure that safety valve 6 sets, safety valve 6 off-loads, can oil pressure not too high to guarantee system.It is to guarantee that b road pressure oil can keep certain back pressure that safety valve 6 also has an effect, such as about 1Mpa, and the demand of the pressure minimum that commutates when satisfying hydraulic control.C road fuel feeding is divided into two-way e (corresponding to second guide's oil duct 13 among Fig. 7) and f (corresponding to first guide's oil duct 12 among Fig. 7) through behind the reduction valve 14; Flow to the two ends of each Reversing valve plate respectively; Be used for guide oil as the hydraulic control switching-over; Hydraulic control hydraulic fluid port 37 from Fig. 8 flows into Reversing valve plate, thereby flows to electromagnetism valve pocket 33 through the end cap guide oil oil input channel 38 of left and right sides end cap.First guide's oil duct 12 and second guide's oil duct 13 respectively with the valve body of Reversing valve plate on about two hydraulic control hydraulic fluid ports 37 communicate, through the end cap guide oil oil input channel 38 of end cap guide oil is introduced electromagnetism valve pocket 33.
Claims (1)
1. establish the electric liquid multiple directional control valve of floating type manual draw bar in the Reversing valve plate; Comprise oil-feed valve block (1), Reversing valve plate (2) and oil return valve block (3); It is characterized in that; Said Reversing valve plate (2) comprises switching-over valve body (17), first end cap (18) and second end cap (19), and first end cap (18) and second end cap (19) are located at the two ends of switching-over valve body (17) respectively; Be equipped with switching-over oil duct (21) and end cap back oil road (22) in the inner chamber of said first end cap (18) and second end cap (19), said end cap back oil road (22) is connected with valve body guide oil back oil road (23);
Be provided with manual draw bar (24) in the switching-over oil duct (21) in the inner chamber of said first end cap (18); Valve rod (25) left part of said Reversing valve plate (2) is stretched in the switching-over oil duct (21) of said first end cap (18); Left end at the valve rod (25) of said Reversing valve plate (2) is provided with floating bushing (26); The left part of said valve rod (25) is provided with outside thread, and the internal surface of floating bushing (26) is provided with internal thread, and valve rod (25) is connected through screw pair with floating bushing (26); The left part of floating bushing (26) is a cavity, and the right part of manual draw bar (24) is embedded in the cavity of floating bushing (26) left part, is Spielpassung between the cavity of the right part of said manual draw bar (24) and said floating bushing (26); Be fixedly connected with switching-over pulling block (27) on the left part of said manual draw bar (24), said reversing handle (28) is fixedly connected on the said switching-over pulling block (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213711 CN202531914U (en) | 2012-05-13 | 2012-05-13 | Electro-hydraulic multi-channel reversing valve with floating type manual pull rod in reversing valve sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213711 CN202531914U (en) | 2012-05-13 | 2012-05-13 | Electro-hydraulic multi-channel reversing valve with floating type manual pull rod in reversing valve sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202531914U true CN202531914U (en) | 2012-11-14 |
Family
ID=47133101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220213711 Expired - Fee Related CN202531914U (en) | 2012-05-13 | 2012-05-13 | Electro-hydraulic multi-channel reversing valve with floating type manual pull rod in reversing valve sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202531914U (en) |
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2012
- 2012-05-13 CN CN 201220213711 patent/CN202531914U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20200513 |