CN1088290A - Control curcuit of plug-in valve for hydraulic props - Google Patents
Control curcuit of plug-in valve for hydraulic props Download PDFInfo
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- CN1088290A CN1088290A CN 92107851 CN92107851A CN1088290A CN 1088290 A CN1088290 A CN 1088290A CN 92107851 CN92107851 CN 92107851 CN 92107851 A CN92107851 A CN 92107851A CN 1088290 A CN1088290 A CN 1088290A
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- valve
- control
- hydraulic
- plug
- cartridge
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- 239000007788 liquid Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
Control curcuit of plug-in valve for hydraulic props of the present invention is best suited for hydraulic support.Adopt four cartridge valves of a pilot valve centralized Control, with four logical hydraulic fluid ports of former three position four-way directional control valve convert to four independently " single control resistance " hydraulic support is controlled, change the traditional control method of support hydraulic system, can improve the advancing velocity of support greatly, the specification of each pick-and-place components main can be selected by actual flow, make the nominal size minimum of structure, need not use hydraulic control one-way valve on its working connection, can further reduce liquid flowing loss.When column was in the stretching state, the leakage column of pilot valve kept stretching not have influence in addition.
Description
The present invention relates to control curcuit of plug-in valve for hydraulic props, be particularly useful for the control of hydraulic support column or each jack.
The executive component of hydraulic support is oil cylinder (column or jack), and its control requires commutation to be arranged, be parked in a certain position, safe pressure limiting etc.The control mode of hydraulic support has two kinds at present, and the one, adopt the manual operation valve group to handle the commutation of each oil cylinder, add hydraulic control one-way valve, safety valve etc.; The 2nd, adopt the electric hydraulic control valve commutation, add hydraulic control one-way valve, safety valve etc.No matter be manually control or electrichydraulic control mode, all adopt the method for traditional " discrete component " combination at present, have a series of shortcomings, be example with the control loop of bracket upright post, shown in Figure 1, this loop has following characteristics:
(1) specification of " discrete component " will depend primarily on the maximum stream flow in the control loop.If fuel supply flow rate is QO, oil cylinder piston bar both sides area is than AA/AB=a, and when reversal valve Y1 was in left valve position, column rose so, and A chamber oil inlet quantity is QA=QO, and B chamber oil drain quantity is QB, QB=1/a QO; When reversal valve 1 was in right valve position, column descended, and B chamber oil-in is QB=QO, and A chamber oil drain quantity is QA=aQO; Because column piston rod both sides area is bigger than a; generally between 5～12; so the difference of each element working flow is very big; if specification by maximum functional flow decision element; just increased and controlled cost; in fact; bracket upright post cavity of resorption oil return line flow is quite big; on hydraulic control one-way valve and control valve, produce the very big pressure loss; make emulsion pump be in feed flow, off-load, feed flow, the alternating state of off-load more again; column descends very slow, and this is the principal element that influences advancing velocity of hydraulic powered support.
(2) owing to the quantity of " discrete component " is that quantity by load control function increases, therefore, control is more complicated, " discrete component " also the more, total restriction loss is also bigger.
In view of the problem that prior art exists, it is big to the objective of the invention is to design a kind of flow, and the liquid resistance is little, the cartridge valve control loop of the hydraulic support that the control simple effects is good.
The cartridge valve control loop of hydraulic support of the present invention, it has one way valve, safety valve, two two logical pilot operated valve device and oil circuits, it is characterized in that: independently cartridge valve (being single control resistance) is set, with guide's control section these single control resistances are controlled, work characteristics according to different oil cylinders, the form of structure of pilot valve can be different, and the element on guide's control oil channel also can increase or reduce.
The cartridge valve control loop of hydraulic support of the present invention is provided with four cartridge valves in the control loop of hydraulic support column (or jack), replace 4 logical hydraulic fluid ports of original control valve, with a pilot valve these four cartridge valves is controlled; Realize the voltage-limiting protection in A chamber with safety valve and cartridge valve; Guarantee setting load with two two logical pilot operated valve device and one way valve, hydraulic control one-way valve and one way valve are arranged on the control oil channel of cartridge valve.Each cartridge valve can be integrated one, pilot valve can with plug-in mounting integrated package centralized arrangement, also can be arranged apart.Pilot valve can be manual control, also can be electrichydraulic control.
The cartridge valve control loop of hydraulic support of the present invention, utilize cartridge valve that hydraulic support is controlled and have following advantage:
(1) the cartridge valve through-current capability is big, and flow resistance loss is little, can improve the advancing velocity of hydraulic support greatly.
(2) sealing is reliable, can realize not having leaking.
(3) specification of each pick-and-place components main can be selected by actual flow, has realized rational selection, makes the nominal size minimum of structure.
(4) on working connection, need not use hydraulic control one-way valve, further reduce liquid flowing loss.
(5) safety valve of can packing in the control cover plate of pick-and-place components 1 is realized the voltage-limiting protection function to the A chamber, must not establish safety valve in addition.
Description of drawings:
Fig. 1 is the prior art hydraulic schematic diagram;
Fig. 2 is the hydraulic schematic diagram that meets theme of the present invention.
Reversal valve Y1, hydraulic control one-way valve Y2, safety valve Y3, oil cylinder Y4, cartridge valve 1,2,3,4, pilot valve 5, safety valve 6, hydraulic control one-way valve 7, hydraulic control shuttle valve 8, one way valve 9.
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
The cartridge valve control loop of hydraulic support of the present invention, it is by cartridge valve 1,2,3,4, pilot valve 5, hydraulic control shuttle valve 8, safety valve 6, one way valve 9 compositions such as grade, its loop is used for the column of hydraulic support is controlled, in addition, all available cartridge valve control of other oil cylinder, principle is roughly the same, work characteristics according to different oil cylinders, guide's control section is different, i.e. the form of structure difference of pilot valve, and the element on guide's control oil channel can increase or reduce.When pilot valve 5 was in meta, main cartridge valve 1,2,3 was in obstructed state, and cartridge valve 4 is in conducting state, and the A chamber of column is closed, and the B chamber leads to oil sump (oil return pipe), and column is slack.When the A cavity pressure surpasses the set pressure of safety valve 6, then safety valve unloading.When pilot valve 5 was in position, a left side, cartridge valve 2,4 was opened, and 1,3 close, A advances pressure oil in the chamber, the oil return of B chamber, and column rises, meanwhile, hydraulic control shuttle valve 8 is in conducting state, also to A chamber fuel feeding, even at this moment pilot valve 5 is turned back meta, this still conducting of auxiliary feed-oil passage, when the A cavity pressure rose to the pumping plant charge oil pressure, one way valve 9 was closed under spring action, guaranteed " support just ".When pilot valve 5 was in right position, cartridge valve 1,3 was opened, and 2,4 close, and B advances pressure oil in the chamber, the oil return of A chamber, column descends, and shuttle valve 8 is in open position simultaneously, when at this moment pilot valve 5 being got back to meta, shuttle valve 8 keeps open position, thereby the A chamber does not have oil inlet passage, and column is slack.When column was in the stretching state, the leakage column of pilot valve 5 kept stretching not have influence, so pilot valve 5 also can adopt guiding valve.In addition, hydraulic control one-way valve 7 and one way valve 9 can also play when the A cavity pressure surpasses the fuel feeding oil supply pressure, cut off the effect of A chamber and guide's control section, thereby pilot valve 5 can design by charge oil pressure.Cartridge valve 1,2,3,4 can be integrated in one, pilot valve 5 can with plug-in mounting integrated package centralized arrangement, also can be arranged apart, pilot valve 5 can adopt manual control, also can adopt electromagnetic valve structure, promptly can will manually control pilot valve replace a certain plate valve of the original control valve of support, and the plug-in mounting integrated package is loaded on column bottom or other jack one end, just can constitute manual guide and control the cartridge valve hydraulic circuit support is controlled.
Claims (4)
1, control curcuit of plug-in valve for hydraulic props, it has one way valve, safety valve, two two logical pilot operated valve device, it is characterized in that: independently cartridge valve (being single control resistance) is set, with guide's control section these single control resistances is controlled, according to the work characteristics of different oil cylinders, the structural shape of pilot valve can be different, and the element on guide's control oil channel also can increase or reduce.
2, control curcuit of plug-in valve for hydraulic props according to claim 1 is characterized in that: four cartridge valves are set in the control loop of bracket upright post, with a pilot valve these four cartridge valves are controlled; Realize the voltage-limiting protection in A chamber with safety valve and cartridge valve; Guarantee setting load with two two logical pilot operated valve device and one way valve, hydraulic control one-way valve and one way valve are arranged on the control oil channel of cartridge valve.
3, according to claim 1,2 described control curcuit of plug-in valve for hydraulic props, it is characterized in that: each cartridge valve can be integrated in one, pilot valve can with plug-in mounting integrated package centralized arrangement, also can be arranged apart.
4, according to claim 1,2 described control curcuit of plug-in valve for hydraulic props, it is characterized in that: pilot valve can be manual control, also can be electrichydraulic control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107851 CN1088290A (en) | 1992-12-13 | 1992-12-13 | Control curcuit of plug-in valve for hydraulic props |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107851 CN1088290A (en) | 1992-12-13 | 1992-12-13 | Control curcuit of plug-in valve for hydraulic props |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1088290A true CN1088290A (en) | 1994-06-22 |
Family
ID=4943108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107851 Pending CN1088290A (en) | 1992-12-13 | 1992-12-13 | Control curcuit of plug-in valve for hydraulic props |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1088290A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749447B (en) * | 2008-12-03 | 2010-12-29 | 徐州重型机械有限公司 | Flow control valve |
| CN104881000A (en) * | 2014-02-27 | 2015-09-02 | 中国矿业大学 | High-precision full-automatic servo control system of roadway support test stand |
| CN107842529A (en) * | 2017-09-21 | 2018-03-27 | 太原科技大学 | A kind of loop for improving pump control cylinder system response time |
| CN111911216A (en) * | 2020-06-19 | 2020-11-10 | 太原理工大学 | Directional flow valve with continuous flow adjusting function and control method thereof |
-
1992
- 1992-12-13 CN CN 92107851 patent/CN1088290A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749447B (en) * | 2008-12-03 | 2010-12-29 | 徐州重型机械有限公司 | Flow control valve |
| CN104881000A (en) * | 2014-02-27 | 2015-09-02 | 中国矿业大学 | High-precision full-automatic servo control system of roadway support test stand |
| CN107842529A (en) * | 2017-09-21 | 2018-03-27 | 太原科技大学 | A kind of loop for improving pump control cylinder system response time |
| CN107842529B (en) * | 2017-09-21 | 2019-09-13 | 太原科技大学 | A kind of circuit for improving pump control cylinder system response time |
| CN111911216A (en) * | 2020-06-19 | 2020-11-10 | 太原理工大学 | Directional flow valve with continuous flow adjusting function and control method thereof |
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