CN101210581B - Self-reducing resisting hydraulic cylinder - Google Patents
Self-reducing resisting hydraulic cylinder Download PDFInfo
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- CN101210581B CN101210581B CN2006100645613A CN200610064561A CN101210581B CN 101210581 B CN101210581 B CN 101210581B CN 2006100645613 A CN2006100645613 A CN 2006100645613A CN 200610064561 A CN200610064561 A CN 200610064561A CN 101210581 B CN101210581 B CN 101210581B
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- 239000012530 fluid Substances 0.000 claims description 37
- 239000000945 filler Substances 0.000 claims description 25
- 239000002828 fuel tank Substances 0.000 claims description 25
- 238000010992 reflux Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 210000001124 body fluid Anatomy 0.000 claims description 2
- 239000010839 body fluid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 138
- 238000004880 explosion Methods 0.000 description 14
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention discloses an anti-self-falling hydraulic cylinder, which comprises a hydraulic cylinder, an oil control device connecting with the hydraulic cylinder and controlling the movement of the hydraulic cylinder and an air control device connecting with the oil control device and controlling the movement of the oil control device. A controllable one-way valve is arranged between an oil inlet/outlet of the hydraulic cylinder and the oil control device, and comprises an oil inlet, an oil outlet and a control port; the oil inlet of the controllable one-way valve is connected with the oil control device, the oil outlet of the controllable one-way valve is connected with the oil inlet/outlet of the hydraulic cylinder, and the control port of the controllable one-way valve is connected with the air control device or the oil control device. The controllable one-way valve can adopt a hydraulic control one-way valve or a pneumatic control one-way valve; when an urgent event happens, such as breakage of an oil pipeline or rapture of a gear pump, the controllable one-way valve can shut down automatically, and oil in the hydraulic cylinder body stops flowing out, the hydraulic cylinderstops during the process; thereby preventing safety accidents due to rapid falling.
Description
Technical field
The present invention relates to a kind of oil hydraulic cylinder, in particular for when running into emergency case such as oil pipe explosion, control valve explosion, preventing in the machinery such as dump truck from the oil hydraulic cylinder that falls.
Background technique
Oil hydraulic cylinder in the existing dump truck and control loop thereof generally include oil hydraulic pump, fuel tank and other hydraulic unit.When in engineering, using dump truck; As being in lifting, middle stopping time in the compartment when situation such as oil pipe explosion, control valve explosion and gear pump burst occurring; Can effectively prevent the oil liquid leakage in the oil hydraulic cylinder owing to lack corresponding technical measures; This moment, the compartment will be uncontrolled be accompanied by leakage and the decline fast of oil hydraulic cylinder oil, thereby was prone to lead to great security incident such as hurt sb.'s feelings.
A kind of oil hydraulic cylinder that is used for hoist is disclosed among the Chinese patent CN200410089347.4; This oil hydraulic cylinder has been installed a safety installations at its oil outlet place; This safety installations utilizes the principle of common one-way valve, through reducing the size of return opening, and reduces the rate of descent of oil hydraulic cylinder.This safety installations is made up of unidirectional valve seat, nonreturn valve core, and the porose ring washer of using is installed on the wherein unidirectional valve seat, and it is spacing that this hole is used for one-way valve with ring washer, and the aperture of filler opening and return opening is inequality on the nonreturn valve core.Though above technological scheme has been alleviated the rate of descent of oil hydraulic cylinder, when it breaks at oil pipe etc., oil hydraulic cylinder is stopped immediately; Particularly when object weight that oil hydraulic cylinder bore is bigger; It is very big that the fluid speed of process return opening can become, and fluid is revealed very fast, still can not fundamentally prevent the oil hydraulic cylinder rapid drawdown; And its complex structure uses also very inconvenient.When being used in it on dumping car, because the object weight in the compartment is often bigger, it can not prevent that still unexpected decline owing to the compartment is prone to lead to the generation of great security incident such as hurt sb.'s feelings.
Summary of the invention
The oil hydraulic cylinder that the purpose of this invention is to provide a kind of self-reducing resisting; This oil hydraulic cylinder can be when running into situation such as oil pipe explosion, control valve explosion and gear pump burst, thereby prevent that effectively fluid in the oil hydraulic cylinder from revealing the generation of the security incident of avoiding causing owing to descending rapidly of oil hydraulic cylinder rapidly.
In order to realize the foregoing invention purpose, the present invention has adopted following technical proposals: the oil hydraulic cylinder of this self-reducing resisting comprises: be connected and control the oil control device of oil hydraulic cylinder action with oil hydraulic cylinder, and be connected and control the gas control device of this oil control device action with oil control device; Oil hydraulic cylinder has oil inlet and outlet; Wherein, Oil inlet and outlet and oily the control between the device at oil hydraulic cylinder are provided with the controllable type one-way valve; The controllable type one-way valve comprises filler opening, oil outlet and control interface; The filler opening of controllable type one-way valve links to each other with oil control device; The oil outlet of controllable type one-way valve links to each other with the oil inlet and outlet of oil hydraulic cylinder, and the control interface of controllable type one-way valve is connected with the gas control device, controls said controllable type one-way valve by said gas control device and when said oil control device runs into improper situation, realizes oppositely by function oil hydraulic cylinder being stopped in fast.
The oil hydraulic cylinder of above-mentioned self-reducing resisting, the controllable type one-way valve that is provided is the gas control one-way valve.
The oil hydraulic cylinder of above-mentioned self-reducing resisting; The oil control device that is provided comprises distributing valve, fuel tank and gear pump; Distributing valve comprises filler opening, return opening and oil outlet; Said fuel tank links to each other with the filler opening of distributing valve through gear pump and constitutes the flow channel that fluid in the oil feeding reservoirs gets into hydraulic cylinder body, and link to each other with the fuel tank fluid of formation feed flow cylinder pressure cylinder body of the return opening of distributing valve is back to the return flow line in the fuel tank, and the oil outlet of distributing valve is connected with the oil inlet and outlet of oil hydraulic cylinder.
The oil hydraulic cylinder of above-mentioned self-reducing resisting, the gas control device that is provided comprises gas bag and two control valves, said gas bag is connected with said gear pump through a control valve, links to each other with said distributing valve with the control interface of said gas control one-way valve respectively through another control valve.
The oil hydraulic cylinder of above-mentioned self-reducing resisting, another control valve that provides comprises two outlets, and the one of which outlet is connected with the control interface of gas control one-way valve, and another outlet is connected with distributing valve, and two outlets are interconnected and cooperate control hydraulic cylinder body fluid to reflux.
Because the controllable type one-way valve in the present technique scheme has control interface, this control interface is connected with the gas control device, by this gas control device; When running into oil pipe explosion, gear pump and sudden situation such as burst; Can make valve closing, play the function of oppositely ending, the interior liquid that can not of oil hydraulic cylinder this moment flows out in cylinder body; Stop in the oil hydraulic cylinder, and then prevented the generation of security incident.This controllable type one-way valve adopts the gas control one-way valve; Its control interface is connected with a gas bag, through the operation gas bag, can flow into the flow of the gas of its control interface through control; The action of control gas control one-way valve; Make it when running into sudden situation such as oil pipe explosion, gear pump burst, possess the function of oppositely ending, and then realize stopping in the oil hydraulic cylinder.
The present invention also can adopt following technological solid yardage case, and the oil hydraulic cylinder of this self-reducing resisting comprises: be connected and control the oil control device of oil hydraulic cylinder action with oil hydraulic cylinder, and be connected and control the gas control device of this oil control device action with oil control device; Oil hydraulic cylinder has oil inlet and outlet; Wherein, Said oil control device comprises distributing valve, fuel tank and gear pump; Said distributing valve comprises filler opening, return opening and oil outlet, and said fuel tank links to each other with the filler opening of distributing valve through gear pump and constitutes the flow channel that fluid in the oil feeding reservoirs gets into hydraulic cylinder body, and link to each other with the fuel tank fluid of formation feed flow cylinder pressure cylinder body of the return opening of said distributing valve is back to the return flow line in the fuel tank; Said Pilot operated check valve comprises filler opening, oil outlet and control interface; The filler opening of said Pilot operated check valve links to each other with the oil outlet of the distributing valve of oil control device, and the oil outlet of said Pilot operated check valve links to each other with the oil inlet and outlet of said oil hydraulic cylinder, and the control interface of said Pilot operated check valve is connected with the oil pipe that the distributing valve of oil control device leads to the filler opening of Pilot operated check valve.
The oil hydraulic cylinder of above-mentioned self-reducing resisting, the gas control device that is provided comprises gas bag and two control valves, said gas bag is connected with said gear pump through a control valve, is connected with distributing valve through another control valve.
Because the controllable type one-way valve in this technological scheme also has control interface; This control interface is connected with oil control device; By this oil control device, when running into sudden situation such as oil pipe explosion, gear pump burst, can flow into the fluid flow of control interface through control; Make valve closing, and then realize stopping in the oil hydraulic cylinder.This valve can adopt Pilot operated check valve; Be connected the control interface of Pilot operated check valve with the oil pipe that leads to oil hydraulic cylinder, when running into oil pipe explosion, gear pump and sudden situation such as burst, control interface can make Pilot operated check valve close; Play the function of oppositely ending, and then realize stopping in the oil hydraulic cylinder.
Description of drawings
Fig. 1 is the fundamental diagram of first embodiment of the invention.
Fig. 2 is the fundamental diagram of second embodiment of the invention.
Embodiment
Referring to Fig. 1, comprise oil control device, gas control device and oil hydraulic cylinder 6 in the first embodiment of the present invention; Oil control device is connected with oil hydraulic cylinder 6; The gas control device is connected with oil control device, and it is through the action of control oil control device, and then the action of control oil hydraulic cylinder 6.
Oil control device comprises hydraulic pressure components and parts such as oil cylinder 3, gear pump 4, distributing valve 5, and wherein distributing valve 5 comprises oil inlet P 5, return opening O5 and oil outlet A5.
Two fluid passages are arranged between fuel tank 3 and distributing valve 5, according to its different separately effect, the fluid that flows 5 directions from fuel tank 3 towards distributing valve the passage of process; Be called flow channel; It is to be connected and composed through the oil inlet P 5 of gear pump 4 with distributing valve 5 by fuel tank 3, for the fluid that prevents to flow out refluxes, on this passage, also is provided with common one-way valve 10; The filler opening 101 of this common one-way valve 10 is connected with gear pump, and oil outlet 102 is connected with the oil inlet P 5 of distributing valve 5; The fluid that flows 3 directions from distributing valve 5 towards fuel tank the passage of process, be called the return flow line, it is that return opening O5 by distributing valve 5 is communicated with fuel tank 3 and constitutes, oil hydraulic cylinder 6 interior fluid can be in this passage be back to fuel tank 3.
The gas control device comprises air pressure components and parts such as gas bag 1, control valve 2, control valve 7.Wherein, Control valve 2 has three outlets and promptly exports A2, outlet B2, outlet C2; Gas bag 1 is connected with the valve inlet P2 of control valve 2 through tracheae; Three of control valve 2 outlet A2, B2, C2 respectively with distributing valve 5 on valve switch be connected, make control valve 2 actions can realize controlling the closing and commutating of valve of distributing valve 5 through operation gas bag 1.
In the present embodiment, the oil outlet A5 of distributing valve 5 connects a gas control one-way valve 9.Gas control one-way valve 9 comprises filler opening 91, oil outlet 92 and control interface 93, and wherein, the filler opening 91 of gas control one-way valve 9 links to each other with the oil outlet A5 of distributing valve 5, and its oil outlet 92 links to each other with the oil inlet and outlet of oil hydraulic cylinder 6; The control interface 93 of gas control one-way valve 9 links to each other with the valve export C2 of control valve 2.
Gas bag 1 is connected with the control interface 93 of gas control one-way valve 9 and the control switch of distributing valve 5 respectively through control valve 2, and the outlet B2 of control valve 2 is connected with distributing valve 5, and outlet C2 is connected with the control interface 93 of gas control one-way valve 9; And outlet B2 is connected with outlet C2, and operation gas bag 1 makes the gas in the gas bag 1 get into gas control one-way valve 9 through control interface 93, and gas control one-way valve 9 is opened; Simultaneously; These distributing valve 5 valves are communicated with the return flow line, thereby make the fluid in the oil hydraulic cylinder 6 be able to reflux, and oil hydraulic cylinder 6 descends; In addition, gas bag 1 is connected with the control switch 8 of gear pump 4 through control valve 7, makes these control valve 7 actions can realize the switching to control switch 8 through operation gas bag 1, and then realizes the switching of control gear pump 4.
When oil hydraulic cylinder 6 was in the working state of rising, gas control one-way valve 9 was in normal unidirectional on state, and fluid is realized forward flow; Promptly through operation gas bag 1, gear pump 4 is started, fluid forms pressure oil liquid through gear pump 4; This fluid arrives gas control one-way valve 9 places through flow channel, and this moment, gas control one-way valve 9 was opened under the pressure effect of fluid; Fluid gets in the cylinder body of oil hydraulic cylinder 6, and the piston of oil hydraulic cylinder 6 is able to rise.
When oil hydraulic cylinder 6 was in the working state of decline, gas control one-way valve 9 was in the reverse-conducting state, and fluid is realized reverse flow; Promptly, the gas of pressure is got in the gas control one-way valve 9 through control interface 93, make gas control one-way valve 9 reverse openings through operation gas bag 1; At this moment; Because gear pump 4 is in closed condition, under the action of gravity of the piston of fluid in cylinder body in the hydraulic cylinder body, through gas control one-way valve 9 inflow return flow lines; Then arrive fuel tank 3, the piston of oil hydraulic cylinder 6 is able to descend.
When running into improper situation, when promptly running into situation such as oil pipe explosion or gear pump 4 burst, no gas is in control interface 93 gets into gas control one-way valves 9, thereby gas control one-way valve 9 can't realize reverse opening, and it possesses reverse by function; This moment, oil hydraulic cylinder 6 interior fluid can only rest in the oil hydraulic cylinder 6, and then prevented that fluid from leaking from rent fast, thereby oil hydraulic cylinder 6 can be stopped in the Rapid Realization.
Referring to Fig. 2, second embodiment of the invention is similar with principle with first embodiment's structure, and its identical components and parts have adopted identical label.Its difference is; In the present embodiment; Connect a Pilot operated check valve 11 between distributing valve 5 and the oil hydraulic cylinder 6, this Pilot operated check valve 11 comprises filler opening 111, oil outlet 112 and control interface 113, wherein; The filler opening 111 of Pilot operated check valve 11 links to each other with the oil outlet A5 of distributing valve 5, and its oil outlet 112 links to each other with the oil inlet and outlet of oil hydraulic cylinder 6; The control interface 113 of Pilot operated check valve 11 is connected with the oil pipe that distributing valve 5 leads to the filler opening 111 of Pilot operated check valve 11.
Gas bag 1 is connected the switching-over in order to control distributing valve 5 respectively through control valve 2 with the control switch of distributing valve 5; In addition, gas bag 1 is connected with the control switch 8 of gear pump 4 through control valve 7, makes these control valve 7 actions can realize the switching to control switch 8 through operation gas bag 1, and then realizes the switching of control gear pump 4.
When oil hydraulic cylinder 6 was in the working state of rising, Pilot operated check valve 11 was in normal unidirectional on state, and fluid is realized forward flow; Promptly through operation gas bag 1, gear pump 4 is started, fluid passes through flow channel through gear pump 4; Arrive Pilot operated check valve 11 places, this moment, Pilot operated check valve 11 was opened under the pressure effect of fluid; Fluid gets in the cylinder body of oil hydraulic cylinder 6, and the piston of oil hydraulic cylinder 6 is able to rise.
When oil hydraulic cylinder 6 was in the working state of decline, Pilot operated check valve 11 was in the reverse-conducting state, and fluid is realized reverse flow; Though promptly this moment, gear pump 4 was in closed condition; But fluid gets into control interface 113 under slight pressure effect; And then make Pilot operated check valve 11 realize reverse opening, under the action of gravity of the piston of fluid in cylinder body in oil hydraulic cylinder 6 cylinder bodies, through Pilot operated check valve 11 inflow return flow lines; Then arrive fuel tank 3, the piston of oil hydraulic cylinder 6 is able to descend.
When running into improper situation, when situation such as oil pipe explosion or gear pump 4 burst promptly occurring, explosion of Pilot operated check valve 11 to oil pipe or gear pump 4 burst the fluid at place, can produce reverse flow, and can not get in the Pilot operated check valve 11 through control interface 113.Therefore, Pilot operated check valve 11 is closed and can't be realized reverse opening, and the fluid in the oil hydraulic cylinder 6 can only rest in the oil hydraulic cylinder 6, and then prevents that fluid from leaking from rent fast, thereby oil hydraulic cylinder 6 can be stopped in the Rapid Realization.
When the present invention is used in the dumping car; Thereby since oil hydraulic cylinder 6 link to each other with the compartment support on the compartment rise, decline or in stop; When running into sudden situation such as oil pipe explosion, gear pump burst, because oil hydraulic cylinder 6 stops in time realizing, therefore; The position is on it and for compartment that it supported stops in also can in time realizing, avoided since the compartment descend the security incident that possibly cause.
Claims (7)
1. the oil hydraulic cylinder of a self-reducing resisting comprises: be connected and control the oil control device of oil hydraulic cylinder action with said oil hydraulic cylinder, and control the gas control device that device is connected and controls this oil control device action with said oil; Said oil hydraulic cylinder has oil inlet and outlet; It is characterized in that; Be provided with the controllable type one-way valve between the oil inlet and outlet of said oil hydraulic cylinder and the oil control device; Said controllable type one-way valve comprises filler opening, oil outlet and control interface, and the filler opening of said controllable type one-way valve links to each other with oil control device, and the oil outlet of said controllable type one-way valve links to each other with the oil inlet and outlet of said oil hydraulic cylinder; The control interface of said controllable type one-way valve is connected with the gas control device, controls said controllable type one-way valve by said gas control device and when said oil control device runs into improper situation, realizes oppositely by function oil hydraulic cylinder being stopped in fast.
2. the oil hydraulic cylinder of self-reducing resisting as claimed in claim 1 is characterized in that, said controllable type one-way valve is the gas control one-way valve.
3. the oil hydraulic cylinder of self-reducing resisting as claimed in claim 2; It is characterized in that; Said oil control device comprises distributing valve, fuel tank and gear pump; Said distributing valve comprises filler opening, return opening and oil outlet; Said fuel tank links to each other with the filler opening of distributing valve through gear pump and constitutes the flow channel that fluid in the oil feeding reservoirs gets into hydraulic cylinder body, and link to each other with the fuel tank fluid of formation feed flow cylinder pressure cylinder body of the return opening of said distributing valve is back to the return flow line in the fuel tank, and the oil outlet of distributing valve is connected with the oil inlet and outlet of oil hydraulic cylinder.
4. the oil hydraulic cylinder of self-reducing resisting as claimed in claim 3; It is characterized in that; Said gas control device comprises gas bag and two control valves, and said gas bag is connected with said gear pump through a control valve, links to each other with said distributing valve with the control interface of said gas control one-way valve respectively through another control valve.
5. the oil hydraulic cylinder of self-reducing resisting as claimed in claim 4; It is characterized in that said another control valve comprises two outlets, the one of which outlet is connected with the control interface of gas control one-way valve; Another outlet is connected with distributing valve, and said two outlets are interconnected in order to cooperate control hydraulic cylinder body fluid to reflux.
6. the oil hydraulic cylinder of a self-reducing resisting comprises: be connected and control the oil control device of oil hydraulic cylinder action with said oil hydraulic cylinder, and control the gas control device that device is connected and controls this oil control device action with said oil; Said oil hydraulic cylinder has oil inlet and outlet; It is characterized in that; Said oil control device comprises distributing valve, fuel tank and gear pump; Said distributing valve comprises filler opening, return opening and oil outlet; Said fuel tank links to each other with the filler opening of distributing valve through gear pump and constitutes the flow channel that fluid in the oil feeding reservoirs gets into hydraulic cylinder body, and the return opening of the said distributing valve fluid that constitutes feed flow cylinder pressure cylinder body that links to each other with fuel tank is back to the return flow line in the fuel tank, is provided with Pilot operated check valve the oil inlet and outlet and oily the control between the device of said oil hydraulic cylinder; Said Pilot operated check valve comprises filler opening, oil outlet and control interface; The filler opening of said Pilot operated check valve links to each other with the oil outlet of the distributing valve of oil control device, and the oil outlet of said Pilot operated check valve links to each other with the oil inlet and outlet of said oil hydraulic cylinder, and the control interface of said Pilot operated check valve is connected with the oil pipe that the distributing valve of oil control device leads to the filler opening of Pilot operated check valve.
7. the oil hydraulic cylinder of self-reducing resisting as claimed in claim 6 is characterized in that, said gas control device comprises gas bag and two control valves, and said gas bag is connected with said gear pump through a control valve, is connected with distributing valve through another control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100645613A CN101210581B (en) | 2006-12-28 | 2006-12-28 | Self-reducing resisting hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100645613A CN101210581B (en) | 2006-12-28 | 2006-12-28 | Self-reducing resisting hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101210581A CN101210581A (en) | 2008-07-02 |
| CN101210581B true CN101210581B (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100645613A Expired - Fee Related CN101210581B (en) | 2006-12-28 | 2006-12-28 | Self-reducing resisting hydraulic cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN101210581B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951557B (en) * | 2011-08-19 | 2015-02-18 | 北汽福田汽车股份有限公司 | Hydraulic system used for elevating mechanism |
| CN104141652A (en) * | 2013-05-10 | 2014-11-12 | 中国飞机强度研究所 | Hydraulic loading equipment fault protecting device |
| CN104214151B (en) * | 2014-08-14 | 2016-04-27 | 阜新力夫特液压有限公司 | A kind of dumping car air-over hydraulic |
| CN106640797B (en) * | 2016-12-21 | 2018-04-24 | 中车长江车辆有限公司 | Side dumper compartment overturns pneumatic-hydraulic control system |
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2006
- 2006-12-28 CN CN2006100645613A patent/CN101210581B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101210581A (en) | 2008-07-02 |
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Granted publication date: 20120418 Termination date: 20171228 |