CN203906426U - Three-stage logic combination valve for unloading of large hydraulic system - Google Patents
Three-stage logic combination valve for unloading of large hydraulic system Download PDFInfo
- Publication number
- CN203906426U CN203906426U CN201420266747.7U CN201420266747U CN203906426U CN 203906426 U CN203906426 U CN 203906426U CN 201420266747 U CN201420266747 U CN 201420266747U CN 203906426 U CN203906426 U CN 203906426U
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- valve
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- cartridge valve
- pressure relay
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Abstract
The utility model provides a three-stage logic combination valve for unloading of a large hydraulic system. The three-stage logic combination valve comprises an electromagnetic directional valve and a pressure relay valve; a service port of the electromagnetic directional valve is connected with a control oil port of a first cartridge valve; an oil inlet of the first cartridge valve is connected with oil outlets of a first adjustable restrictive valve, a second adjustable restrictive valve and a third cartridge valve; an oil inlet of the third cartridge valve is connected with an oil inlet of the pressure relay valve, an oil inlet of the first adjustable restrictive valve and a control oil port of a second cartridge valve; during use, an oil return port of the electromagnetic directional valve and an oil return port of the pressure relay valve are respectively connected with a pilot valve oil return port ; an oil outlet of the first cartridge valve and an oil outlet of the second cartridge valve are connected with a system oil return port; an oil inlet of the electromagnetic directional valve, an oil inlet of the second cartridge valve, an oil inlet of the second adjustable restrictive valve and a pilot control port of the pressure relay valve are all connected with a main system loop port. The three-stage logic combination valve realizes control effect of a proportional valve through a hydraulic multi-stage control mode, and can completely substitute for the proportional valve.
Description
Technical field
The utility model belongs to hydraulics field, relates to a kind of unloading valve of Large Hydraulic System, especially relates to a kind of three grades of logical combination valves of Large Hydraulic System off-load.
Background technique
Hydraulic shock when Large Hydraulic System unloads under the working state of high pressure, large flow, vibration are larger, in order to improve this situation, normally adoption rate Flow valve carries out controlled variable-flow unloading, but the Proportional valve of the large flow of general high voltage all needs import, price is high, the order cycle time is long, causes that equipment cost is high, lead time is long, the market competitiveness weakens.Simultaneously, a little less than the contamination resistance due to Proportional valve, high to the required precision of hydraulic oil, it is made up of high-precision part in addition, while being out of order user cannot Dismountable, assembling, need depot repair, increased maintenance expenses and shutdown loss and spare part expense.
Summary of the invention
The purpose of this utility model is to provide a kind of three grades of logical combination valves for Large Hydraulic System off-load, replaces the proportional flow control valve using in Large Hydraulic System, reduces the required precision to hydraulic oil, reduces maintenance expenses simultaneously.
For achieving the above object, the technological scheme that the utility model adopts is: a kind of three grades of logical combination valves for Large Hydraulic System off-load, comprise solenoid directional control valve and pressure relay valve; The working hole of solenoid directional control valve connects the control port of the first cartridge valve; The filler opening of the first cartridge valve is connected with oil outlet, the oil outlet of the second adjustable restrictive valve and the oil outlet of the 3rd cartridge valve of the first adjustable restrictive valve; The filler opening of the 3rd cartridge valve is connected with filler opening, the filler opening of the first adjustable restrictive valve and the control port of the second cartridge valve of pressure relay valve respectively; When use, the return opening of the return opening of solenoid directional control valve and pressure relay valve is connected with pilot valve return opening respectively; The oil outlet of the oil outlet of the first cartridge valve and the second cartridge valve is connected with system oil return mouth respectively; The filler opening of solenoid directional control valve, the filler opening of the second cartridge valve, the filler opening of the second adjustable restrictive valve and the pilot control opening of pressure relay valve are all connected with main loop interface.
When the utility model combination brake switch and proporting carries out hydraulic system off-load, realize release by solenoid directional control valve, the first cartridge valve, the first adjustable restrictive valve, the second cartridge valve, the second adjustable restrictive valve, complete and unload stream by pressure relay valve, the 3rd cartridge valve, the second cartridge valve.During for Large Hydraulic System off-load, can reduce hydraulic shock, reach the control effect of Proportional valve by the mode of hydraulic multi-stage control, completely substitution ratio valve.And there is the features such as simple in structure, reliability is high, the microcomputer of having simplified equipment controls cost, is easy to safeguard, reduce required precision to hydraulic oil.
Brief description of the drawings
Fig. 1 is the structural representation of three grades of logical combination valves of the utility model.
In figure: 1. solenoid directional control valve, 2. the first cartridge valve, 3. the first adjustable restrictive valve, 4. the second cartridge valve, 5. the second adjustable restrictive valve, 6. the 3rd cartridge valve, 7. pressure relay valve;
P. main loop interface, Y. pilot valve return opening, T. main system return opening.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
For making Large Hydraulic System when work off-load stably, be convenient to safeguard simultaneously, the utility model provides a kind of three grades of logical combination valves for hydraulic system off-load of alternative Proportional valve, these three grades of logical combination valves are to use two-way logical valve, adjustable restrictive valve, the large flow unloading valve of a kind of combined type that pressure relay valve is combined into, by the setting pressure of set pressure relay valve and the restriction size of adjustable restrictive valve, control the corresponding variation (main valve plug is with pressure unloading valve core opening speed variation from small to large from high to low) with the variation of unloading pressure of main valve opening speed, thereby the compression shock while having reduced high pressure unloading, reached the control effect of Proportional valve completely by the mode of hydraulic multi-stage control, it is the desirable unloading valve of Large-scale High-Pressure Mass flow system, reduce to a great extent the cost of hydraulic system, also simplified the Control System of Microcomputer of equipment simultaneously.
As shown in Figure 1, three grades of logical combination valves of the utility model, comprise solenoid directional control valve 1 and pressure relay valve 7; Solenoid directional control valve 1 adopts two position, three-way electromagnetic change valve, and the working hole of solenoid directional control valve 1 connects the control port of the first cartridge valve 2; The filler opening of the first cartridge valve 2 is connected with the oil outlet of the first adjustable restrictive valve 3, oil outlet and the 3rd the fuel-displaced of cartridge valve 6 of the second adjustable restrictive valve 5; The filler opening of the 3rd cartridge valve 6 is connected with filler opening, the filler opening of the first adjustable restrictive valve 3 and the control port of the second cartridge valve 4 of pressure relay valve 7 respectively.
The first cartridge valve 2 and the 3rd cartridge valve 6 all adopt little latus rectum two-way plug-in valve; The second cartridge valve 4 adopts large latus rectum two-way plug-in valve.
The working procedure of three grades of logical combinations of the utility model:
The return opening of the return opening of solenoid directional control valve 1 and pressure relay valve 7 is connected with pilot valve return opening Y respectively; The oil outlet of the oil outlet of the first cartridge valve 2 and the second cartridge valve 4 is connected with system oil return mouth T respectively; The filler opening of solenoid directional control valve 1, the filler opening of the second cartridge valve 4, the filler opening of the second adjustable restrictive valve 5 and the pilot control opening of pressure relay valve 7 are all connected with main loop interface P.System under high pressure conditions, solenoid directional control valve 1 dead electricity, the first cartridge valve 2 and the second cartridge valve 4 are closed, now under high pressure oil effect, pressure relay valve 7 switches to the working position that filler opening and working hole communicate, the 3rd cartridge valve 6 is in closed condition.When system needs off-load, solenoid directional control valve 1 first electric, the first cartridge valve 2 is opened, hydraulic system is by two approach releases, via the second adjustable restrictive valve 5 and the first cartridge valve 2 releases and via the second cartridge valve 4 releases, along with the fluid in the second cartridge valve 4 control chambers is discharged via the second adjustable restrictive valve 5 and the first cartridge valve 2, the passway that the working hole of pressure relay valve 7 and return opening communicate is strengthened gradually.In the time that hydraulic system pressure is down to the set pressure of pressure relay valve 7, pressure relay valve 7 return to primitive age positions, the 3rd cartridge valve 6 is opened, fluid in the second cartridge valve 4 control chambers is discharged via the first cartridge valve 2 fast by the 3rd cartridge valve 6, now the second cartridge valve 4 goes to standard-sized sheet by little opening, realizes large flow and unloads stream.In above-mentioned uninstall process, by regulating the first adjustable restrictive valve 3, control opening speed and the openings of sizes of the second cartridge valve 4 in the time of initial release, this process need regulate the second adjustable restrictive valve 5 to realize off-load simultaneously.
When the utility model carries out hydraulic system off-load with three grades of logical combination valves, realize release by solenoid directional control valve 1, the first cartridge valve 2, the first adjustable restrictive valve 3, the second cartridge valve 4, the second adjustable restrictive valve 5, complete and unload stream by pressure relay valve 7, the 3rd cartridge valve 6, the second cartridge valve 4.Therefore, when three grades of logical combination valves of the utility model are used for to Large Hydraulic System off-load, can reduce hydraulic shock, reach the control effect of Proportional valve by the mode of hydraulic multi-stage control, completely substitution ratio valve.And simple in structure, reliability is high, the microcomputer of having simplified equipment controls cost, is easy to safeguard.
Claims (3)
1. for three grades of logical combination valves of Large Hydraulic System off-load, it is characterized in that, comprise solenoid directional control valve (1) and pressure relay valve (7); The working hole of solenoid directional control valve (1) connects the control port of the first cartridge valve (2); The filler opening of the first cartridge valve (2) is connected with the oil outlet of the oil outlet of the first adjustable restrictive valve (3), the second adjustable restrictive valve (5) and the oil outlet of the 3rd cartridge valve (6); The filler opening of the 3rd cartridge valve (6) is connected with filler opening, the filler opening of the first adjustable restrictive valve (3) and the control port of the second cartridge valve (4) of pressure relay valve (7) respectively; When use, the return opening of the return opening of solenoid directional control valve (1) and pressure relay valve (7) is connected with pilot valve return opening (Y) respectively; The oil outlet of the oil outlet of the first cartridge valve (2) and the second cartridge valve (4) is connected with system oil return mouth (T) respectively; The filler opening of solenoid directional control valve (1), the filler opening of the second cartridge valve (4), the filler opening of the second adjustable restrictive valve (5) and the pilot control opening of pressure relay valve (7) are all connected with main loop interface (P).
2. according to claim 1 for three grades of logical combination valves of Large Hydraulic System off-load, it is characterized in that, described solenoid directional control valve (1) adopts two position, three-way electromagnetic change valve.
3. according to claim 1 for three grades of logical combination valves of Large Hydraulic System off-load, it is characterized in that, described the first cartridge valve (2) and the 3rd cartridge valve (6) adopt little latus rectum two-way plug-in valve, and the second cartridge valve (4) adopts large latus rectum two-way plug-in valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266747.7U CN203906426U (en) | 2014-05-23 | 2014-05-23 | Three-stage logic combination valve for unloading of large hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266747.7U CN203906426U (en) | 2014-05-23 | 2014-05-23 | Three-stage logic combination valve for unloading of large hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906426U true CN203906426U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420266747.7U Expired - Fee Related CN203906426U (en) | 2014-05-23 | 2014-05-23 | Three-stage logic combination valve for unloading of large hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906426U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858756A (en) * | 2015-05-28 | 2015-08-26 | 河北新兴铸管有限公司 | Nodular cast iron pipe ring cutting device |
| CN106640849A (en) * | 2017-01-23 | 2017-05-10 | 王安基 | Multistage logic unloading valve and hydraulic system |
| CN108317275A (en) * | 2018-03-09 | 2018-07-24 | 江苏恒立液压科技有限公司 | Multifunction non-leakage commutation loop |
| CN109372733A (en) * | 2018-09-13 | 2019-02-22 | 北京天地玛珂电液控制系统有限公司 | The control system of the multistage off-load of centralization based on more pumping plant parallel connection liquid-supplying systems |
| CN110486345A (en) * | 2019-08-20 | 2019-11-22 | 江苏柳工机械有限公司 | Combined hydraulic valve |
-
2014
- 2014-05-23 CN CN201420266747.7U patent/CN203906426U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858756A (en) * | 2015-05-28 | 2015-08-26 | 河北新兴铸管有限公司 | Nodular cast iron pipe ring cutting device |
| CN106640849A (en) * | 2017-01-23 | 2017-05-10 | 王安基 | Multistage logic unloading valve and hydraulic system |
| CN108317275A (en) * | 2018-03-09 | 2018-07-24 | 江苏恒立液压科技有限公司 | Multifunction non-leakage commutation loop |
| CN108317275B (en) * | 2018-03-09 | 2023-06-06 | 江苏恒立液压科技有限公司 | Multifunctional leakage-free reversing loop |
| CN109372733A (en) * | 2018-09-13 | 2019-02-22 | 北京天地玛珂电液控制系统有限公司 | The control system of the multistage off-load of centralization based on more pumping plant parallel connection liquid-supplying systems |
| CN110486345A (en) * | 2019-08-20 | 2019-11-22 | 江苏柳工机械有限公司 | Combined hydraulic valve |
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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 |
Granted publication date: 20141029 Termination date: 20190523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |