CN1028180C - Low controlling-pressure sequence fluid one way valve - Google Patents
Low controlling-pressure sequence fluid one way valve Download PDFInfo
- Publication number
- CN1028180C CN1028180C CN 91102122 CN91102122A CN1028180C CN 1028180 C CN1028180 C CN 1028180C CN 91102122 CN91102122 CN 91102122 CN 91102122 A CN91102122 A CN 91102122A CN 1028180 C CN1028180 C CN 1028180C
- Authority
- CN
- China
- Prior art keywords
- valve
- main valve
- pressure
- control piston
- spool
- 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
Abstract
The present invention relates to a force-induced hydraulic chamber-amplified downdraught engine which belongs to the field of hydraulic drive mechanisms. Staged energy amplification is carried out through a multi-stage machine set composed of a hydraulic motor and an oil pump which have the same power. After energy diffluence, a part of energy enters the hydraulic motor to do work to as to convert pressure energy into mechanical energy, the other part flows back to an energy accumulator and uses the energy of the energy accumulator as a power source to start the engine so that the engine can continuously output energy and do work on a working surface. The engine can substitute various resources and other engines in a wide range and is an energy-saving product.
Description
The present invention relates to a kind of sequence fluid one way valve of low controlling-pressure, this valve belongs to leading type Pilot operated check valve class, promptly partly is made up of pilot valve, main valve and control piston etc.It can use as Pilot operated check valve and sequence valve respectively, thereby is widely used a kind of hydraulic element in the hydraulic system.
Mainly there is the problem of two aspects in present Pilot operated check valve, and the one, when reverse inlet pressure is very high, need very high pilot pressure just can open the main valve window.Because main valve plug will lean on its control piston to the top and open, consider the volume of valve body and the power of control section, control piston can not be excessive with the ratio of main valve plug area, is generally about 3 times.Therefore when reverse inlet pressure was 31.5MPa, pilot pressure needed just can open main valve plug more than or equal to 10MPa, and this point brings difficulty often for the use of hydraulic system.The leading type Pilot operated check valve for head it off has developed, if reverse inlet pressure is 31.5MPa, and reverse loop is when being a sealing load, accumulator for example, and then pilot pressure only needs can open main valve plug below the 1MPa.The disclosed a kind of one-way valve of controlling hydraulic pressure installation of US Patent specification US3623509 is exactly this class leading type Pilot operated check valve, its pilot valve is a cone valve that is arranged on the main valve axis, the thin end of this cone valve has one section push rod and has part to be exposed at the main valve plug outside, the big end of cone valve inwardly, and be pressed on the main valve plug by main spool spring, thereby main valve plug also is crushed on the main valve seat whereby.When the control piston bar to main valve plug near the time, at first run into the above-mentioned push rod of guide valve core, and it pushed open.Since the area of guide valve seat normally the control piston area 1/30～1/70, therefore when reverse inlet pressure is 31.5MPa, only the pilot pressure of needs 1～0.45MPa can be opened guide valve core.Pilot valve will have segment fluid flow to flow out from the pilot valve window after opening.Because reverse loop is a sealing load, and liquid can be similar to and regards incompressible as, so reverse pressure makes reduction widely when pilot valve is opened after, so just can open main valve plug by less pressure when the control piston bar is run into the main valve plug end face.Yet, if reverse loop is an active network, such as a high pressure pumping source, or a vertical oil cylinder of bearing weight etc.The tiny flow quantity that flowed out after this moment, pilot valve was opened is not enough to reduce reverse inlet pressure.Therefore the pilot pressure of opening main valve plug still needs about 1/3 of reverse pressure.This is one of subject matter of Pilot operated check valve existence at present.Problem on the other hand is an induced pressure, i.e. the influence of reverse outlet pressure.Because induced pressure acts on respectively on control piston and the main valve end face, because the former area is 3 times of latter's area approximately, so the value of pilot pressure thereby increase is 2/3 of an induced pressure, if induced pressure is 10MPa, then the pilot pressure value added is about 7MPa.Because processing technology and part strength and rigidity are limit, the right side of control piston goes out shank diameter and can not do too for a short time, generally is 0.45 times of piston diameter, and pilot valve window diameter normally the control piston diameter about 1/7.So this structure under the induced pressure effect, though reduced to back down the needed pilot pressure of main valve plug, has increased and has backed down the needed pilot pressure of guide valve core.For example, if A
3Be the control piston area, P
kBe pilot pressure, A
2=0.025A
3Be the pilot valve window area, A
4=0.2A
3Be the right rod end area of control piston, P
1=10MPa is an induced pressure, then backs down the pilot pressure P of the required increase of pilot valve
k=(A
4-A
2) P
1/ A
3If=(0.2-0.025) 10=1.75MPa is reverse inlet pressure P
2=31.5MPa then backs down the needed pilot pressure P of guide valve core
k=2.7MPa, and P during unloading pressure
kBe about 1MPa, the influence of visible induced pressure can not be ignored.
Task of the present invention is, a kind of type pilot formula Pilot operated check valve that leaks that has the order function is proposed, this valve is not increasing under the preceding topic of control piston diameter, utilizes very low pilot pressure can open reverse loop and is the main valve window of high pressure when active, and be not subjected to the influence of induced pressure.In addition, this Pilot operated check valve of the present invention's proposition can also use as internal control sequence valve and external control sequence valve.
The technical measures that solve task of the present invention are, two chambeies before and after the convex shoulder of main valve plug is divided into the circular hole in the valve body of place, ante-chamber communicates with reverse filler opening, also be connected with the main valve window, back cavity is a spring chamber, this chamber communicates with reverse filler opening by an inclined hole on valve body, a damping hole is set in this inclined hole, for ante-chamber and the load cavity that makes control piston separates, and communicate with oil return, control piston is arranged to the formula of leaking, and makes the sectional area of its right rod equate with the area of pilot valve window, between control fluid import and control piston oil suction chamber, a cylindrical bilateral three-way valve is set, the spool lower end communicates with the import of control fluid, and the upper end communicates with oil return, and the centre communicates with the control piston oil suction chamber, there is pressure adjusting spring the spool upper end, and the spring upper end is provided with regulator bolts.
Though, when control piston and control fluid promote down when the main valve plug direction is close, at first run into the thin push rod of guide valve core front portion, and pilot valve opened, the ratio that needed pilot pressure equals pilot valve window area and control piston area is multiplied by reverse inlet pressure again, add the ratio of pre-pressure of the spring and frictional force and control piston area, this value generally in 1MPa, has partially liq from wherein flowing out after the pilot valve window is opened.According to the bernoulli theorem as can be known, therefore the oil pressure of main valve plug back cavity will reduce this moment, and the value of its reduction is relevant with the aperture of pilot valve window.The pilot valve aperture of the maximum opening that should make guide valve core during greater than the main valve plug balance.Making a concerted effort of hydraulic coupling that two chambeies are applied to it before and after main valve plug and spring force is zero, this increases along with the increase of pilot valve aperture again with joint efforts later on, and when sensing pilot valve window is opened big direction, main valve plug just begins and then, and guide valve core moves together, thereby open the main valve window, visible main valve plug of the present invention does not need control piston directly to promote.Whether this structure and working principle show that the power of opening pilot valve promptly is to open the power of main valve, and active irrelevant with reverse loop, again because the sectional area of the right rod of control piston equates that with the pilot valve window area thereby power and the induced pressure of opening pilot valve have nothing to do.Begin to follow guide valve core when motion at main valve plug, because the pressure of main valve plug back cavity is less than reverse filler opening pressure, so the power of time control system pilot valve is little will start than pilot valve the time.Guide valve core will be closed the pilot valve window automatically under the effect of spring force and hydraulic coupling when removing controls pressure, and by in like manner aforementioned, main valve plug will be followed the guide valve core reversing motion and be closed the main valve window at last.
If set the numerical value of pilot pressure, can realize that obviously the big more pilot pressure of opening sequence valve window that needs of precompression of spring is also big more by the regulator bolts of sequence valve.
If the control mouthful outside control mouth as sequence valve, then the present invention promptly is the external control sequence valve; If communicating with reverse filler opening, a control mouth just constitutes inner control preface valve.
The present embodiment shown in conjunction with the accompanying drawings, the Pilot operated check valve that the present invention is proposed is further described.Wherein
Fig. 1 is the structural profile schematic representation of Pilot operated check valve of the present invention;
Fig. 2 is by the sectional view along the A-A line shown in Figure 1;
Fig. 3 is by the sectional view along the B-B line shown in Figure 1.
As shown in Figure 1, Pilot operated check valve of the present invention partly is made up of guide valve core 4, main valve plug 2, main spool spring 1, control piston 6, order spool 11, pressure adjusting spring 9, regulator bolts 8 and damping hole 17 etc.Wherein main valve plug 2 is arranged in the cylindrical cavity 19 of valve body 3 right-hand members, can in this chamber, horizontally slip, frustum is arranged in the left side of main valve plug 2, and constitutes tapered window 22 with the right-hand member in the intermediate cylindrical hole 5 of valve body 3, promptly constitute Pilot operated check valve just, the main window of reverse flow of fluid.For ease of processing, also a main valve housing can be set between main valve plug 2 and valve body 3.On the axis of main valve plug 2, be provided with two diameter differences, but run through the circular hole of two end face.Be provided with a poppet valve core in the bigger circular hole in right side, promptly guide valve core 4, and the intersection of two circular holes promptly is its guide valve seat.At the little push rod that the left end of guide valve core 4 has a diameter to equate with the pilot valve window, it and guide valve core 4 are an integral body, and slide in the aperture of main valve plug 2 left ends.When the pilot valve close, this push rod stretches out the outer segment length of left end of main valve plug 2.Outer surface at this push rod is opened several grooves along axial direction, for example, also can do or shape shown in Figure 3, and its effect is that pilot valve window and intermediate cavity 5 are linked up.Right-hand member at guide valve core 4 is provided with a main spool spring 1, and the right-hand member of main spool spring is fixed on the spring seat 20, and spring seat 20 then is contained in the circular hole of right end cap 18.Obviously main spool spring 1 is pressed in guide valve core 4 on the main valve plug 2, thereby also main valve plug 2 is pressed on the main valve window 22.The outside of main valve plug 2 is made up of two sections different cylinders of diameter.Two chambeies about the convex shoulder section that main valve plug 2 diameters are bigger is divided into cavity volume 19 are only linked up by a damping hole 17 therebetween.Wherein left chamber communicates with the reverse filler opening 16 and the main valve window 22 of valve, and the intermediate cavity 5 of valve body 3 communicates with the reverse oil outlet 15 of valve.A control piston 6 is housed in the left end cavity volume of valve body 3, and the right rod 23 of this piston is the movable push rod of a diameter and pilot valve window equal diameters.Its right-hand member is provided with a boss, can prevent that push rod from blocking or pushing up partially.The right chamber of control piston 6 is provided with a return opening 14, and left chamber then communicates with oilhole 13 on the valve left end cap 10.An order guiding valve is set on left end cap 10, it is a cylindrical bilateral three-way valve, spool 11 is arranged in the vertical circular hole of left end cap, the lower end of this circular hole communicates with control port 12, be provided with a prolate oilhole 13 near on the wall of 11 times convex shoulders of spool, the transverse section of above-mentioned oilhole as shown in Figure 2, b is in 2 millimeters among the figure, 1 is slightly less than the length of 11 times convex shoulders of spool.The spool neck communicates with the cavity volume 24 of top with the formed cavity volume of the circular hole of left end cap 10, because the last convex shoulder outside of spool 11 is provided with three semi-circular grooves as shown in Figure 3, cavity volume 24 communicates with return opening 14 by oil circuit 7 and the right chamber of control piston again.In the epicoele 24 of spool 11 pressure adjusting spring 9 is housed, a regulator bolts 8 then is equipped with in its upper end, is used for the precompression of Regulation spring.
Further specify working principle of the present invention now.
One, the working principle of reverse action
When adjusting bolt 8 is retreated to upper limit position, control fluid can be very little pressure push spool 11 open and enter the left chamber of control piston 6 by oil circuit 13, thereby promoting control piston 6 moves right, so right rod 23 is pushed guide valve core 4 open, fluid in the main valve plug 2 right chambeies 19 is flowed out from the pilot valve window, so the time pressure P in the cavity volume 19
3Beginning is less than the pressure P from reverse filler opening 16
2Thereby to the right hydraulic resultant force will be greater than main valve plug 2 right chambeies hydraulic coupling and the making a concerted effort of spring force left in main valve plug 2 left chambeies, therefore main valve plug 2 will move right and open main valve window 22 automatically, main valve plug 2 moves right and will turn down the pilot valve window, thereby the hydraulic coupling on main valve plug 2 right sides will increase, making a concerted effort on acting on main valve plug 2 be when being zero, main valve plug 2 stop motions.In fact, main valve plug 2 will move right from motion tracking guide valve core 4, and it is zero that the difference of both positions makes making a concerted effort on the main valve plug 2 just, or little greater than zero (making a concerted effort to point to the right).Therefore, the maximum open amount of main valve plug depends on the range (beginning to count from running into guide valve core 4) of control piston 6.When removing controls pressure, order spool 11 will move down into the lower position in the effect of pressure adjusting spring 9, and this moment, control piston 6 left chamber fluid passed through the right chamber oil return of oil circuit 13,7 and control piston 6.Therefore, guide valve core 4 tries hard to close the pilot valve window under right side main spool spring 1 and action of hydraulic force, but when being closed to a certain value, because the hydraulic coupling on main valve plug 2 right sides increases, make begin to point to the left side making a concerted effort on the main valve plug 2, so main valve plug 2 remains and follow guide valve core 4 to left movement, the speed of whole main valve plug 2 motions depends on the diameter of damping hole 17, do not clash into when obviously, main valve plug 2 is closed.
Find out from above-mentioned analysis: the maximum pilot pressure of reverse unlatching main valve is opened the moment appearance at pilot valve, just begin to be reduced to certain steady-state value (the pilot pressure value when being the main valve plug pursuit movement) later on, on the other hand because when removing controls pressure, order spool 11 makes the left chamber fluid oil return of control piston, so Pilot operated check valve of the present invention keying error is very little.
Two, sequence control principle
Be not difficult to find out that from Fig. 1 the condition of control fluid opening sequence spool 11 is to act on hydraulic coupling on order spool 11 lower end surfaces more than or equal to the precompression of set spring it on, so by regulator bolts pilot pressure P can be set
kSize.But its minimum value should be greater than the above-mentioned required minimum pilot pressure of guide valve core 4 of opening.
Claims (5)
1, a kind of sequence fluid one way valve of low controlling-pressure, by valve body, pilot valve, main valve and control piston etc. are partly formed, wherein pilot valve is a cone valve that is arranged on the main valve axis, the thin end of this cone valve has one section push rod and has part to be exposed at the main valve plug outside, the big end of cone valve inwardly, and be pressed on the main valve plug by main spool spring, thereby main valve plug also is crushed on the main valve seat whereby, above-mentioned main valve plug is arranged in the cylindrical cavity of valve body right-hand member, can in this chamber, slide, the right-hand member that the intermediate cylindrical hole of frustum and valve body is arranged in the left side of main valve plug constitutes taper main valve window, a control piston is housed in the left end cavity volume of valve body, be provided with a movable masthead between the thin end of this control piston and above-mentioned cone valve, it is characterized in that, between spool (2) and valve body (3), a main valve housing is set, the sectional area of the right rod of control piston (6) equates with the pilot valve window area, the back cavity (19) of main valve plug (2) in valve body (3) communicates with reverse filler opening (16) by an inclined hole, a damping hole (17) is set in this inclined hole, the right chamber of control piston (6) is provided with a return opening (14), communicate with oil circuit (7) simultaneously, the right-hand member of movable push rod (23) is provided with a boss, and an order guiding valve is set between control fluid import (12) and control piston (6).
2, by the sequence fluid one way valve of the described low controlling-pressure of claim 1, it is characterized in that the pilot valve aperture the when maximum opening of guide valve core (4) should be greater than main valve plug (2) balance.
3, sequence fluid one way valve by the described low controlling-pressure of claim 1, it is characterized in that, the order guiding valve comprises a cylindrical bilateral two-way valve core (11), a pressure adjusting spring (9) and a regulator bolts (8), wherein, the following convex shoulder bottom of spool (11) communicates with control fluid import (12), the intermediate cavity of spool (11) communicates with the spring chamber (24) of top, and spring chamber communicates with return opening (14) by oil circuit (7) and the right chamber of control piston, the side of the following convex shoulder of spool (11) is provided with a prolate window through hole (13) and communicates with the oil suction chamber of control piston (6), when controlling oil liquid pressure less than spool (11) upper end spring force, control piston (6) oil return, otherwise then oil-feed.
4, by the sequence fluid one way valve of the described low controlling-pressure of claim 3, it is characterized in that the length (1) of prolate window through hole (13) is slightly less than the length of convex shoulder under the spool (11), width (b) is in 2 millimeters.
5, press the sequence fluid one way valve of each described low controlling-pressure in the claim 1～4, it is characterized in that, to control fluid import (12) and link to each other with reverse filler opening (16) and constitute the internal control sequence valve, will control fluid import (12) and be used as outside control mouth, formation external control sequence valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102122 CN1028180C (en) | 1991-04-09 | 1991-04-09 | Low controlling-pressure sequence fluid one way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102122 CN1028180C (en) | 1991-04-09 | 1991-04-09 | Low controlling-pressure sequence fluid one way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1065708A CN1065708A (en) | 1992-10-28 |
| CN1028180C true CN1028180C (en) | 1995-04-12 |
Family
ID=4905417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91102122 Expired - Fee Related CN1028180C (en) | 1991-04-09 | 1991-04-09 | Low controlling-pressure sequence fluid one way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028180C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435445B (en) * | 2007-11-16 | 2011-01-12 | 上海立新液压有限公司 | Liquid-controlled non-return valve |
| CN101871474B (en) * | 2009-04-27 | 2013-01-30 | 蔡业 | High-discharge taper sealing hydraulic valve |
| CN102102689B (en) * | 2011-01-30 | 2013-04-10 | 林友根 | Hydraulic one-way valve |
| CN102518617B (en) * | 2011-12-21 | 2014-11-19 | 湖南特力液压有限公司 | Travel valve, sequential action type combination hydraulic cylinder and hydraulic equipment |
| CN102537433B (en) * | 2011-12-22 | 2013-08-28 | 江南工业集团有限公司 | Balanced air-controlled one-way check valve |
| CN103836016A (en) * | 2012-11-23 | 2014-06-04 | 上海立新液压有限公司 | Electric hydraulic control check valve |
| CN103836234B (en) * | 2014-03-30 | 2016-03-16 | 温州志杰机电科技有限公司 | A kind of male connection aluminum alloy two leaf connects muscle horizontal single-headed valve |
| CN103953760B (en) * | 2014-04-27 | 2016-04-27 | 张志雄 | A kind of thimble connector aluminum alloy two leaf connects muscle vertical check valve |
| CN104061203B (en) * | 2014-06-26 | 2016-05-11 | 无锡市威海达机械制造有限公司 | A kind of high pressure check valve |
| CN106286456B (en) * | 2016-10-26 | 2018-12-07 | 燕山大学 | A kind of hydraulic control one-way valve |
| CN111148932B (en) * | 2017-10-02 | 2021-07-02 | 沃辛顿工业公司 | Pressure-reducing inclined nozzle |
| CN108758041B (en) * | 2018-08-28 | 2019-08-23 | 上海江浪科技股份有限公司 | A kind of No leakage one way sequence valve |
| CN109404574A (en) * | 2018-11-15 | 2019-03-01 | 长沙思胜智能设备有限公司 | The main hydraulic system of check valve and broaching machine |
| CN110500427B (en) * | 2019-08-24 | 2021-01-08 | 浙江创越矿业科技有限公司 | Hydraulic control one-way valve capable of draining oil quickly |
-
1991
- 1991-04-09 CN CN 91102122 patent/CN1028180C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065708A (en) | 1992-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1028180C (en) | Low controlling-pressure sequence fluid one way valve | |
| CN108223493A (en) | A kind of variable balanced valve of pilot ratio | |
| CN107504005B (en) | Forced oil supplementing multi-way valve driven to judge | |
| CN110454460B (en) | Quick oil cylinder with pressurization function | |
| CN102788150A (en) | Novel hydraulic gear-shifting pressure regulating valve | |
| CN109058208B (en) | Buffer overflow valve | |
| CN116085250B (en) | Integrated flow distribution type low-leakage plunger pair device | |
| CN109026889B (en) | Buffer overflow valve | |
| CN201818573U (en) | Integrated valve for small-sized rig | |
| CN101900144B (en) | Small-sized drill pile-up valve | |
| CN110792584B (en) | Multi-gear input power control system of plunger pump | |
| CN2588130Y (en) | Hydraulic cylinder for slow-closing check valve | |
| CN2182294Y (en) | Equivalent control relief valve | |
| CN2416266Y (en) | Priority unloading valve | |
| CN220487986U (en) | Hydraulic lock with unidirectional throttling function for oil cylinder | |
| CN109114061B (en) | Buffer valve | |
| CN2195013Y (en) | Hydraulic control butterfly valve | |
| CN213808071U (en) | Duplex hydraulic gear pump | |
| CN109026887B (en) | Buffer valve | |
| CN208935075U (en) | A kind of hydraulic lock | |
| CN109162977B (en) | Rotary cushion valve | |
| CN109707680A (en) | Compound automatic diverter valve | |
| CN216478121U (en) | Embedded back pressure valve rod assembly structure | |
| CN220248517U (en) | Two-stage oil return backpressure structure | |
| CN220850500U (en) | Quick braking device of mining monorail crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |