CN202176562U - Electro-hydraulic speed control valve - Google Patents
Electro-hydraulic speed control valve Download PDFInfo
- Publication number
- CN202176562U CN202176562U CN201020301334XU CN201020301334U CN202176562U CN 202176562 U CN202176562 U CN 202176562U CN 201020301334X U CN201020301334X U CN 201020301334XU CN 201020301334 U CN201020301334 U CN 201020301334U CN 202176562 U CN202176562 U CN 202176562U
- Authority
- CN
- China
- Prior art keywords
- valve
- balance
- communicated
- control
- 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)
Abstract
The utility model relates to a control valve, in particular to an electro-hydraulic speed control valve, which mainly solves the technical problems in the prior art that the three working gears of a conventional control valve can not satisfy the needs in the practical operation and the shunt control of the working oil ways of the control valve can not be realized. Therefore, the conventional control valve does not have enough gears and is not wide in application range. The electro-hydraulic speed control valve comprising a valve body (1) is characterized in that a pressure-reducing valve unit, a buffer balancing unit and an electro-hydraulic control unit are arranged inside the valve body (1). The electro-hydraulic control unit comprises four electro-hydraulic valves (2), wherein two electro-hydraulic valves are respectively connected with a first gearshift mechanism (3) and a second gearshift mechanism (4) and the other two electro-hydraulic valves are respectively connected with a first bridge-towing mechanism (5) and a second bridge-towing mechanism (6). The first and second gearshift mechanisms are communicated with the buffer balancing unit through oil ways. The first and second bridge-towing mechanisms are communicated with the pressure-reducing valve unit through oil ways.
Description
Technical field
The utility model relates to a kind of control valve, especially relates to a kind of to the isostructural improvement of electrichydraulic control speed change control valve.
Background technique
At present loader uses the two last three retaining machine hydraulic control system speed change control valves that fall basically; Though this speed change control valve, has satisfied not the needs of new type of engineering such as current domestic and international market engineering machinery, road building machine machinery development through multinomial technique improvements such as electrofluidic control devices.Chinese patent discloses a kind of electric liquid speed change control valve (notice of authorization number: CN 2559818Y); It includes solenoid valve; Valve body the right has in three valve openings, and a solenoid valve is housed respectively, and pressure adjusting spring, pressure regulation pad, relief pressure valve cartridge and adjustment packing ring are housed in the upper left valve opening of valve body; Be fixed in the valve opening through plug screw; In the valve opening at the left middle part of valve body adjusting pressuring valve core, guiding valve and pressure adjusting spring are housed, and are fixedly mounted in the valve opening through gland, guiding valve is provided with the throttling pore of stablizing oil circuit pressure.Therefore shortcomings such as but three work gears of this control valve are not enough in real work, and each working oil path can not be carried out control along separate routes, has gear few, and application is wideless need carry out technique improvement.
The model utility content
The utility model technical issues that need to address provide a kind of electrichydraulic control speed change control valve; It mainly is that to solve three work gears of existing in prior technology control valve not enough in real work; Each working oil path can not be carried out control along separate routes; There is gear few, the technical problem that application does not extensively wait.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals:
The electrichydraulic control speed change control valve of the utility model; Comprise valve body; It is characterized in that being provided with in the described valve body relief valve unit, cushioning balance device, electrofluidic control device; Electrofluidic control device includes 4 electro hydraulic valves, and wherein two electro hydraulic valves connect first gearshift, second gearshift respectively, and all the other two electro hydraulic valves connect first respectively and drag bridge mechanism, second to drag bridge mechanism; First, second gearshift is communicated with the cushioning balance device through oil circuit, and first, second drags bridge mechanism to pass through oil circuit connection relief valve unit.First gearshift, the second gearshift working oil path need the process that working pressure has decompression, cushions, boosts when gear switches.First drags bridge mechanism, second to drag the bridge mechanism working oil path to need work under the main oil pressure pressure constant state of setting.Gearshift and drag the existing different pressure requirement of two groups of working oil path of bridge again can synchronous working, and accomplishes state of a control separately again respectively, reaches the centralized control of a plurality of mechanisms.
If change the oil circuit design of valve body; Drag bridge mechanism, second to drag two groups of working oil path of bridge mechanism to merge one group first gearshift, second gearshift and first and make series design; Can be according to the gearbox designing requirement, be provided with three last or two before second-speculation's 4 retaining electrichydraulic control speed change control valves.Do not change structure at this valve, under the installation dimension, reach multi-purpose function.
As preferably; Described relief valve unit includes the decompression valve pocket, and the decompression valve pocket is established filler opening and return opening, and filler opening is communicated with oil pump; Return opening is communicated with the torque-converters hydraulic fluid port; Be provided with the decompression valve rod in the decompression valve pocket, the decompression valve rod is connected with relief spring, and the valve body of decompression valve rod outer end is provided with plug screw.Can establish the pressure regulation pad between relief spring and the decompression valve rod, seal ring and plug screw are established in the relief spring outer end.Depressurized system is set in rated range (main oil pressure is set in 1.3～1.6Mpa) by type during work; Main oil pressure after the setting distributes through oil circuit; Be divided into two the tunnel: one group of working oil path is communicated with the electrofluidic control device that drags bridge mechanism through the valve body oil groove, and 2 electro hydraulic valves are controlled the working state that first, second drags the bridge machine respectively.Another group oil circuit is communicated with the cushioning balance valve pocket through the valve body oil groove.
As preferably; Described cushioning balance device includes the balance valve pocket, is provided with the balance valve pocket in the balance valve pocket, is provided with the balance valve rod in the balance valve pocket; The balance valve rod is connected with balance spring; The valve body of balance valve pocket outer end is provided with cover plate, and the balance valve pocket is communicated with one-way valve, and one-way valve is communicated with throttle valve through oil circuit.Balance valve pocket outer end is provided with gasket seal and cover plate.Cushioning balance device oil circuit is communicated with the electrofluidic control device of K1, K2 gearshift; 2 electro hydraulic valves are installed on the valve body; Control first, second gearshift working oil path respectively, the cushioning balance device can quickly fall to 0.3Mpa with the main oil pressure of setting when first, second gearshift gearshift, recovers main oil pressure in the time again rapidly at 0.8～1.6S; The curve process of form decompression, boosting, buffering, the flexibility effect of running in when reaching gearshift.Shift gears when making the engineering machinery working state working life steady, that prolong gearbox, improved speed change valve reliability, Security, handling, travelling comfort, versatility.
As preferably, described one-way valve oil duct junction is provided with the logical oily sheet of one-way valve.Itself and one-way valve split design, and freely change in the time of can damaging.
As preferably, described throttle valve includes control choke, and control choke one end is provided with dredges needle-valve.In the throttle valve throttle orifice, pack into and dredge needle-valve, make that throttle orifice is not easy to be blocked by booty in the oil-way system and oil product carbonizing matter.Reduce the fault when using effectively.
As preferably, described relief valve unit is communicated with safety valve through oil circuit, and safety valve filler opening place is provided with steel ball, and steel ball attachment security valve spring is provided with the safety valve return opening in the valve pocket of safety valve.The safety valve filler opening is sealed by steel ball, by safety valve spring locked secure valve pressure.Work as hydraulic system fault, when causing main oil pressure to surpass 1.5 times that set working pressure, safety valve is opened release.In the electrichydraulic control speed change is handled the whole hydraulic system of control, add overload protection, made this product safety and reliability.
As preferably, described electro hydraulic valve is plugged on the valve body through screw thread.
Therefore; The utlity model has control valve and be provided with four work gears, gear can be designed to three forward gears by the requirement of gearbox, fall back retaining or two two of forward gears retaining that falls back; Each working oil path can be carried out control along separate routes; There is gear many, characteristics such as application is wider, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model;
Accompanying drawing 2 is backsight structural representations of Fig. 1;
Accompanying drawing 3 is A-A cross-sectional view of Fig. 1.
Component, position and numbering among the figure: valve body 1, electro hydraulic valve 2, first gearshift 3, second gearshift 4, first drag bridge mechanism 5, second to drag the logical oily sheet of bridge mechanism 6, decompression valve pocket 7, decompression valve rod 8, relief spring 9, plug screw 10, balance valve pocket 11, balance valve pocket 12, balance valve rod 13, balance spring 14, cover plate 15, one-way valve 16, one-way valve 17, control choke 18, dredge needle-valve 19, safety valve 20, steel ball 21, safety valve spring 22, safety valve return opening 23.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.
Embodiment: the electrichydraulic control speed change control valve that this is routine, like Fig. 1, Fig. 2, comprise valve body 1, valve body is provided with relief valve unit, relief valve device, cushioning balance device, electrofluidic control device.
Relief valve unit comprises: the decompression valve pocket 7 that is located at valve body 1 inside; Be provided with decompression valve rod 8 in the decompression valve pocket, establish relief spring 9 between decompression valve rod and the valve interior wall, establish the pressure regulation pad between decompression valve rod and the relief spring; Seal ring is established in decompression valve pocket end, and plug screw 10 oil sealings are arranged outward.
Relief valve device is communicated with decompression valve pocket 7 through working oil path, establishes safety valve return opening 23 in the valve pocket of safety valve 20, and gasket seal is established in safe valve pocket outer end, the oil sealing of gasket seal peripheral hardware plug screw.Have safety valve in the safe valve pocket and unload oilhole, plug screw is connected with the steel ball 21 of blocking the safety valve oil circuit through safety valve spring 22.
The cushioning balance device comprises the balance valve pocket 11 that is located at valve body 1 inside, is provided with cover plate 15 outside the balance valve pocket 11, establishes the mattress oil sealing between cover plate and the valve body.Establish balance valve pocket 12 in the balance valve pocket, establish balance valve rod 13 in the balance valve pocket, establish balance spring 14 between balance valve rod and the balance valve pocket.The balance valve pocket connects one-way valve 16, and like Fig. 3, one-way valve is communicated with throttle valve through oil circuit, and throttle valve is provided with control choke 18, and the throttle orifice place of throttle valve establishes dredges needle-valve 19, and the oil duct junction of one-way valve is provided with the logical oily sheet 17 of one-way valve.
Electrofluidic control device includes four electro hydraulic valves 2 of pegging graft through screw thread on the valve body 1.First drags bridge mechanism 5, second to drag the oil circuit of two actuator ports of 6 one groups of bridge mechanisms to be communicated with the decompression valve pocket, and first drags bridge mechanism 5, second to drag bridge mechanism 6 oil circuits respectively by two screw thread INSERTTYPE electro hydraulic valve controls, carries out the work of dragging bridge mechanism.First gearshift 3, second gearshift 4 are that the oil circuit of two actuator ports of one group is communicated with the cushioning balance valve pocket, and first gearshift 3, second gearshift 4 be respectively by other two INSERTTYPE electro hydraulic valves controls, carry out speed change valve forward gear, retaining falls back.
Claims (7)
1. electrichydraulic control speed change control valve; Comprise valve body (1); It is characterized in that being provided with in the described valve body (1) relief valve unit, cushioning balance device, electrofluidic control device; Electrofluidic control device includes 4 electro hydraulic valves (2), and wherein two electro hydraulic valves connect first gearshift (3), second gearshift (4) respectively, and all the other two electro hydraulic valves connect first respectively and drag bridge mechanism (5), second to drag bridge mechanism (6); First, second gearshift is communicated with the cushioning balance device through oil circuit, and first, second drags bridge mechanism to pass through oil circuit connection relief valve unit.
2. electrichydraulic control speed change control valve according to claim 1; It is characterized in that described relief valve unit includes decompression valve pocket (7), the decompression valve pocket is established filler opening and return opening, and filler opening is communicated with oil pump; Return opening is communicated with the torque-converters hydraulic fluid port; Be provided with decompression valve rod (8) in the decompression valve pocket, the decompression valve rod is connected with relief spring (9), and the valve body (1) of decompression valve rod outer end is provided with plug screw (10).
3. electrichydraulic control speed change control valve according to claim 1 and 2; It is characterized in that described cushioning balance device includes balance valve pocket (11), be provided with balance valve pocket (12) in the balance valve pocket, be provided with balance valve rod (13) in the balance valve pocket; The balance valve rod is connected with balance spring (14); The valve body of balance valve pocket outer end is provided with cover plate (15), and the balance valve pocket is communicated with one-way valve (16), and one-way valve is communicated with throttle valve through oil circuit.
4. electrichydraulic control speed change control valve according to claim 3 is characterized in that described one-way valve (16) oil duct junction is provided with the logical oily sheet (17) of one-way valve.
5. electrichydraulic control speed change control valve according to claim 3 is characterized in that described throttle valve includes control choke (18), and control choke one end is provided with dredges needle-valve (19).
6. electrichydraulic control speed change control valve according to claim 1 and 2; It is characterized in that described relief valve unit is communicated with safety valve (20) through oil circuit; Safety valve filler opening place is provided with steel ball (21); Steel ball attachment security valve spring (22) is provided with safety valve return opening (23) in the valve pocket of safety valve.
7. electrichydraulic control speed change control valve according to claim 1 and 2 is characterized in that described electro hydraulic valve (2) is plugged on the valve body (1) through screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020301334XU CN202176562U (en) | 2010-01-23 | 2010-01-23 | Electro-hydraulic speed control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020301334XU CN202176562U (en) | 2010-01-23 | 2010-01-23 | Electro-hydraulic speed control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176562U true CN202176562U (en) | 2012-03-28 |
Family
ID=45866443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020301334XU Expired - Fee Related CN202176562U (en) | 2010-01-23 | 2010-01-23 | Electro-hydraulic speed control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176562U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075509A (en) * | 2013-01-30 | 2013-05-01 | 江苏柳工机械有限公司 | Power gear shift speed change operating valve with independent buffer for gears |
| CN103206556A (en) * | 2013-04-27 | 2013-07-17 | 浙江海宏液压科技股份有限公司 | Control valve and electrohydraulic proportional control valve with same |
| CN109737201A (en) * | 2019-02-28 | 2019-05-10 | 山东郯工液压科技有限公司 | A kind of first three latter electro-hydraulic manipulation valve of loading machine gearbox |
-
2010
- 2010-01-23 CN CN201020301334XU patent/CN202176562U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075509A (en) * | 2013-01-30 | 2013-05-01 | 江苏柳工机械有限公司 | Power gear shift speed change operating valve with independent buffer for gears |
| CN103075509B (en) * | 2013-01-30 | 2015-09-30 | 江苏柳工机械有限公司 | The power gear shift speed change control valve of gear individual buffer |
| CN103206556A (en) * | 2013-04-27 | 2013-07-17 | 浙江海宏液压科技股份有限公司 | Control valve and electrohydraulic proportional control valve with same |
| CN109737201A (en) * | 2019-02-28 | 2019-05-10 | 山东郯工液压科技有限公司 | A kind of first three latter electro-hydraulic manipulation valve of loading machine gearbox |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201443544U (en) | Multichannel hydraulic control valve used for prorating load flow | |
| CN102155447B (en) | Rotating hydraulic system of crane and rotating buffer valve thereof | |
| CN104879336A (en) | Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function | |
| CN201763715U (en) | Pile-up valve of gallery drilling machine | |
| CN202176562U (en) | Electro-hydraulic speed control valve | |
| CN103641023B (en) | The hydraulic control system of control cock and hoist brake, hoisting crane | |
| CN102734501B (en) | Converging multipath valve and crane hydraulic system | |
| CN204476899U (en) | A kind of crane rotation system control valve | |
| CN102878141B (en) | Combined type rotary motor reversion-preventing buffering balanced valve | |
| CN202023782U (en) | Rotary hydraulic system of crane and rotary cushion valve of rotary hydraulic system | |
| CN202451485U (en) | Hydraulic synchronization independent control device, synchronous hydraulic system and crane | |
| CN204553377U (en) | Low energy consumption many actuators hydraulic system and excavator | |
| CN103015483B (en) | Time delay brake system of hydraulic slewing device and engineering machine | |
| CN102829011A (en) | Double-pump confluence hydraulic loop combined valve and application thereof | |
| CN203272767U (en) | Multifunctional electro-hydraulic control operating valve | |
| CN202519716U (en) | Excavator scarper pan hydraulic system with confluence accelerating function | |
| CN205207311U (en) | Meso position burden flow valve, swing arm energy -saving control system and excavator | |
| CN202091274U (en) | Electro-hydraulic proportional control valve capable of converting compensation modes | |
| CN103058085A (en) | Winding motor hydraulic system and rotary drilling rig | |
| CN115341615A (en) | Multi-way valve, hydraulic system and excavator | |
| CN106812752B (en) | Multiple directional control valve | |
| CN104806594B (en) | Multi-way valve with oil cylinder load holding function | |
| CN203532381U (en) | Rotary cushion valve and rotary system of crane | |
| CN102094863B (en) | Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode | |
| CN203065074U (en) | Winding motor hydraulic system and rotary drilling rig |
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 |
Granted publication date: 20120328 Termination date: 20150123 |
|
| EXPY | Termination of patent right or utility model |