CN101893007B - Plunger case lifting hydraulic control system - Google Patents
Plunger case lifting hydraulic control system Download PDFInfo
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- CN101893007B CN101893007B CN2010102375526A CN201010237552A CN101893007B CN 101893007 B CN101893007 B CN 101893007B CN 2010102375526 A CN2010102375526 A CN 2010102375526A CN 201010237552 A CN201010237552 A CN 201010237552A CN 101893007 B CN101893007 B CN 101893007B
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- valve
- way valve
- plunger case
- control system
- spool
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Abstract
The invention relates to plunger case control technology, in particular to a plunger case lifting hydraulic control system, which comprises a plunger case, a high pressure oil pump, an oil tank, a balanced energy storage tank and a hydraulic lifting control valve, wherein the hydraulic lifting control valve comprises a check valve A, a check valve B and an electromagnet; the check sides of the check valve A and the check valve B are connected and are connected with the oil inlet of a plunger case and the balanced energy storage tank; the inlet of the check valve A is connected with the output end of the high pressure oil pump; a valve plug of the check valve B supports on a mandril of the electromagnet; and the inlet of the check valve B is communicated with the oil tank through a pipeline. The invention aims to design a plunger case lifting hydraulic control system capable of reducing manufacturing cost, reducing installation volume and improving the sensitivity of control action. Compared with the prior art, the plunger case lifting hydraulic control system has the advantages of flexible installation, safe and convenient operation in the power-off state, particular suitability for occasions with limited installation spaces, convenience in manufacturing and maintaining the control system and the like.
Description
Technical field
The present invention relates to the plunger case control technique, particularly a kind of plunger case lifting hydraulic control system.
Background technique
Along with the raising plunger case of industrialized level applies to every field widely; The mechanism hand of the hydraulic press that pushes up down like some, hydraulic lift, engineering machinery, lifting apparatus etc.; The hydraulic system of controlling its rising and decline is also rich and varied, but no matter how control system often needs several ripe hydrovalves to form.
The typical control system of existing control plunger case lifting is as shown in Figure 1, and it mainly is made up of selector valve, pressure retaining valve, relief valve, Pilot operated check valve and valve body integrated package.This system adopt common Pilot operated check valve and independently one-way valve realize the up-down and the pressurize of plunger case.Therefore the control oil channel and the cracking pressure that need to increase Pilot operated check valve are regulated oil circuit.And the control oil channel that will make Pilot operated check valve is separated with master cylinder oil-feed oil circuit and has therefore independently been increased solenoid directional control valve again.A hydraulic system like this, hydrovalve is more, and installation needs the space big, also need manufacture and design special-purpose valve body integrated package, gives and makes, uses and safeguard and all caused certain inconvenience.
Summary of the invention
The objective of the invention is to design and a kind ofly can reduce manufacture cost, reduce installation volume, improve the plunger case lifting hydraulic control system of control action sensitivity.
In order to achieve the above object, the present invention adopts following technical solution: a kind of plunger case lifting hydraulic control system, and it comprises plunger case, high pressure oil pump, fuel tank and balance energy storage tank; It is characterized in that it also is provided with the hydraulic lifting control valve; Described hydraulic lifting control valve comprises one-way valve A, one-way valve B and electromagnet, and the non-return side of said one-way valve A and one-way valve B is connected, and becomes the oil outlet C of hydraulic lifting control valve; Oil outlet C is connected with the balance energy storage tank with said plunger case filler opening; The inlet of said one-way valve A is the filler opening E of hydraulic lifting control valve, and filler opening E is connected with said high pressure oil pump output terminal, and the spool among the said one-way valve B withstands on the push rod of said electromagnet; The inlet of said one-way valve B is the return opening D of hydraulic lifting control valve, and return opening D communicates with said fuel tank through pipeline.
In said one-way valve B, also be provided with relief arrangement; Said relief arrangement comprises off-load spool and off-load Returnning spring; Said off-load spool one end withstands on the off-load Returnning spring after passing the flange among the said one-way valve B, and the spool that the other end passes among the said one-way valve B withstands on the push rod of said electromagnet.
Be provided with seal arrangement between said off-load spool and the flange, the place is provided with the cone seal body with the corresponding off-load spool of spool unloading hole, and simultaneously, the left and right lifting surface area of said off-load spool in valve pocket equates.
The inlet of said one-way valve A also is connected with the pressure tappings of relief valve, and the relief hole of relief valve is connected with hydraulic lifting valve return opening D.
Said one-way valve A, one-way valve B, relief arrangement, electromagnet and relief valve combine on the valve body.
During rising, high pressure oil pump is given filler opening E oil supply, and high pressure oil gets into plunger case from hydraulic lifting control valve oil outlet C after through the overflow pressure regulating valve, and boosting is then keep-uped pressure by two one-way valve A, B.When needing to descend, make the electromagnet energising, electromagnetic push successively backs down relief arrangement and one-way valve B through push rod.Hydraulic oil is got back to fuel tank through the one-way valve B that backs down in the plunger case, and plunger case descends.
Because several one-way valves and the shared valve body of relief valve, manufacture cost reduces greatly, saves parts such as selector valve, Pilot operated check valve simultaneously; With original system mutually specific volume can reduce more than 2/3; In addition, the pattern of directly directly backing down one-way valve with electromagnet has been saved the process of switching-over and build-up pressure, makes control action sensitivity more; And adopt integrated design not need independent manifold block, give to make and safeguard all to bring great convenience.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is the typical control system of existing control plunger case lifting.
Fig. 2 is present embodiment plunger case lifting hydraulic control system figure.
Fig. 3 is the structural representation of hydraulic lifting control valve in the present embodiment.
Embodiment
Like Fig. 2, shown in Figure 3; Present embodiment comprises plunger case 13; High pressure oil pump 14, fuel tank 15, balance energy storage tank 16 and hydraulic lifting control valve; Described hydraulic lifting control valve comprises one-way valve A, one-way valve B, relief arrangement, electromagnet 11, relief valve 12 and valve body 7, and said one-way valve A, one-way valve B, relief arrangement, electromagnet 11 and relief valve 12 combine on the valve body 7.
The non-return side of said one-way valve A and one-way valve B is connected; Become the oil outlet C of hydraulic lifting control valve; Oil outlet C is connected with balance energy storage tank 16 with said plunger case 13 filler openings, and the inlet of said one-way valve A is the filler opening E of hydraulic lifting control valve, and filler opening E is connected with said high pressure oil pump 14 output terminals; The inlet of said one-way valve B is the return opening D of hydraulic lifting control valve; The inlet of said one-way valve A also is connected with the pressure tappings of relief valve 12, and the relief hole of relief valve 12 is connected with hydraulic lifting control valve return opening D, and return opening D communicates with said fuel tank 15 through pipeline.
Said relief arrangement is located on the said one-way valve B; It comprises off-load spool 5 and off-load Returnning spring 2; Said off-load spool 5 one ends withstand on the off-load Returnning spring 2 after passing the flange 4 among the said one-way valve B, and the spool 6 that the other end passes among the said one-way valve B withstands on the push rod 10 of said electromagnet 11, is provided with seal arrangement 3 between said off-load spool 5 and the flange 4; 9 corresponding off-load spool places are provided with cone seal body 8 with the spool unloading hole; Simultaneously, the left and right lifting surface area of said off-load spool 5 in valve pocket equates, makes off-load spool 5 just offset by the left and right active force of high-pressure and hydraulic oil.Therefore, at electromagnet in the raw down, off-load spool 5 is under the effect of off-load Returnning spring 2 pretightening forces, and cone seal body 8 is with 9 sealings of spool unloading hole.Simultaneously,, electromagnet 11 just can open relief arrangement as long as overcoming the pretightening force of off-load Returnning spring 2, and irrelevant with the flow of control valve itself, make the control valve of present embodiment can be applicable to big flow occasion.
Actual demand processing can be pressed in the position of the filler opening E of control valve, return opening D, oil outlet C in the present embodiment on valve body 7, can be positioned at each side of valve body.Can as shown in Figure 3ly be located at the valve body front side like filler opening E, also can on demand filler opening is opened downside or above.As long as filler opening at the inlet side of a side one-way valve, does not just influence the realization of this control valve function.Other oil outlets, return opening are as the same, do not receive the restriction of this structural representation into and out of the hydraulic fluid port position.
When high pressure oil pump 14 is given filler opening E oil supply; High pressure oil also flows into the pressure tappings of relief valve 12 when flowing into one-way valve A inlet; When pressure surpassed relief valve 12 setting values, relief valve 12 was backed down, and hydraulic oil is from the relief hole oil sump tank of relief valve 12; Pressure reduces the back relief valve and resets, thereby realizes the adjusting to oil circuit pressure.After high pressure oil is regulated through relief valve 12 pressure; Act on the one-way valve A; Under the effect of pressure, one-way valve A is opened, and high pressure oil is from unidirectional inflow plunger case 13 of hydraulic lifting valve oil outlet C and balance energy storage tank 16; Plunger case 13 rises, and high pressure oil flow to the non-return side of one-way valve B through the through hole in the valve body 71 simultaneously.The back pressure that boosts is participated in pressurize by two one-way valve A, B, and pressure maintaining performance is good, can realize zero leakage.Simultaneously, the repairing function that balance energy storage tank 16 is implemented the plunger case lifting loop prevents to descend because of plunger case leaks, and remains on top dead center position.
During decline, electromagnet 11 energisings just can be backed down off-load spool 5 as long as electromagnetic push overcomes the pretightening force of off-load Returnning spring 2, and unloading channel is opened, and the hydraulic oil in the plunger case is through the unloading channel off-load.After the hydraulic oil off-load in the plunger case; One-way valve B non-return side no longer receives the effect of high pressure oil; Spool 5 under the further effect of electromagnetic push among the one-way valve B is further backed down, and the hydraulic oil in the plunger case is got back to fuel tank through the one-way valve B that opens, thereby plunger case is descended.
The hydraulic lifting of, small flow plunger case less for latus rectum, present embodiment can directly adopt the relief arrangement in the control opening controlling valve, realize the off-load of system and the function that unidirectional hydraulic oil refluxes.
In sum, the present invention compared with prior art has the following advantages:
1, control performance is outstanding.Control system before needs electricity consumption SC sigmal control selector valve switching-over, and then further behind Pilot operated check valve control side build-up pressure, one-way valve just can be opened.And the pattern that the present invention adopts electromagnet directly to back down one-way valve has been saved the process of switching-over and build-up pressure, makes control action sensitive more.
2, be specially adapted to the limited occasion of installing space.Because installation volume is few, installing space is economized, and is specially adapted to the limited occasion of installing space, as: the raising platform that the position is lower, the control of engineering machinery tipping bucket cylinders such as automobile, and the control of main shaft brake in the wind power generating set.
3, power down mode easy-to-operate.Traditional control system (like Fig. 1) must the configuration hand pump under power down mode and two one-way valves and the relief valve that cooperate hand pump work, gives to back down Pilot operated check valve behind the hydraulic control one-way valve control side oil supply build-up pressure and could realize release.The present invention as long as manually backing down electromagnet can realize pressure release operation having guaranteed the handling safety under the state of emergency, is more suitable for the occasion that wind-power electricity generation principal shaft braking system etc. has relatively high expectations to fortuitous event under power down mode.
4, further simplify the design of electric control system.The present invention has reduced the electromagnet quantity of system's control usefulness, and only the break-make of the startup of need control motor and an electromagnet just can be controlled the operation of whole system, further simplifies the design of electric control system.
5, maintenance is convenient.The present invention is in case appearance control is insensitive, and the inspection electromagnet gets final product; Pressure maintaining performance is bad, as long as two one-way valve spools of inspection.Compare with need investigating valve body one by one after original system goes wrong, more can practice thrift engineering time.
6, installation form is more flexible.Because the present invention does not have certain manifold block,, can require each hydraulic fluid port position of processing to carry out pipeline according to reality and connect, install more flexible so filler opening and return opening and plunger case filler opening position are more flexible relatively.
Claims (5)
1. plunger case lifting hydraulic control system, it comprises plunger case (13), high pressure oil pump (14), fuel tank (15) and balance energy storage tank (16); It is characterized in that it also is provided with the hydraulic lifting control valve; Described hydraulic lifting control valve comprises one-way valve A, one-way valve B and electromagnet (11), and the non-return side of said one-way valve A and one-way valve B is connected, and becomes the oil outlet C of hydraulic lifting control valve; Oil outlet C is connected with balance energy storage tank (16) with said plunger case (13) filler opening; The inlet of said one-way valve A is the filler opening E of hydraulic lifting control valve, and filler opening E is connected with said high pressure oil pump (14) output terminal, and the spool (6) among the said one-way valve B withstands on the push rod (10) of said electromagnet (11); The inlet of said one-way valve B is the return opening D of hydraulic lifting control valve, and return opening D communicates with said fuel tank (15) through pipeline.
2. plunger case lifting hydraulic control system according to claim 1; It is characterized in that in said one-way valve B, also being provided with relief arrangement; Said relief arrangement comprises off-load spool (5) and off-load Returnning spring (2); Said off-load spool (5) one ends withstand on the off-load Returnning spring (2) after passing the flange (4) among the said one-way valve B, and the spool (6) that the other end passes among the said one-way valve B withstands on the push rod (10) of said electromagnet.
3. plunger case lifting hydraulic control system according to claim 2; It is characterized in that being provided with seal arrangement (3) between said off-load spool (5) and the flange (4); The place is provided with cone seal body (8) with the corresponding off-load spool of spool unloading hole (9); Simultaneously, the left and right lifting surface area of said off-load spool (5) in valve pocket equates.
4. plunger case lifting hydraulic control system according to claim 3 is characterized in that the inlet of said one-way valve A also is connected with the pressure tappings of relief valve (12), and the relief valve relief hole is connected with return opening D.
5. plunger case lifting hydraulic control system according to claim 4 is characterized in that said one-way valve A, one-way valve B, relief arrangement, electromagnet (11) and relief valve (12) combine on the valve body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102375526A CN101893007B (en) | 2010-07-23 | 2010-07-23 | Plunger case lifting hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102375526A CN101893007B (en) | 2010-07-23 | 2010-07-23 | Plunger case lifting hydraulic control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101893007A CN101893007A (en) | 2010-11-24 |
| CN101893007B true CN101893007B (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102375526A Expired - Fee Related CN101893007B (en) | 2010-07-23 | 2010-07-23 | Plunger case lifting hydraulic control system |
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| Country | Link |
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| CN (1) | CN101893007B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697005B (en) * | 2013-12-13 | 2016-02-17 | 麦格瑞冶金工程技术（北京）有限公司 | A kind of control loop of single-action hydraulic cylinder |
| CN109899331B (en) * | 2019-03-22 | 2024-04-12 | 宁波中天海德液压有限公司 | Self-balancing hydraulic lifting supporting device and application thereof |
| CN110985212B (en) * | 2019-11-04 | 2022-04-22 | 南京航空航天大学 | Indirect hydraulic drive type fuel oil switch valve of pump control cylinder and control method thereof |
| CN110979608B (en) * | 2019-12-11 | 2021-07-30 | 武汉华喜特种液压设备有限公司 | Buoyancy adjusting system based on double pumps |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1198773A1 (en) * | 1984-04-13 | 1985-12-15 | Zaporozh Ind Inst | Electrohydraulic mechanism for moving electrode of electric-arc furnace |
| WO2005054629A1 (en) * | 2003-11-29 | 2005-06-16 | Tiefenbach Control Systems Gmbh | Hydraulic circuit used for longwall face removal |
| CN201103577Y (en) * | 2007-09-12 | 2008-08-20 | 鹿洁 | Simple liquid-controlled device |
| CN201763709U (en) * | 2010-07-23 | 2011-03-16 | 吴旭 | Plunger cylinder lifting hydraulic control system |
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2010
- 2010-07-23 CN CN2010102375526A patent/CN101893007B/en not_active Expired - Fee Related
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| CN101893007A (en) | 2010-11-24 |
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Granted publication date: 20120725 Termination date: 20180723 |