CN203429680U - Road-block removing vehicle and hydraulic system thereof for controlling lifting and falling of load - Google Patents
Road-block removing vehicle and hydraulic system thereof for controlling lifting and falling of load Download PDFInfo
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- CN203429680U CN203429680U CN201320445897.XU CN201320445897U CN203429680U CN 203429680 U CN203429680 U CN 203429680U CN 201320445897 U CN201320445897 U CN 201320445897U CN 203429680 U CN203429680 U CN 203429680U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 33
- 230000000630 rising effect Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 178
- 239000010720 hydraulic oil Substances 0.000 abstract description 37
- 238000000034 method Methods 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 5
- 230000033001 locomotion Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 44
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The utility model discloses a road-block removing vehicle and a hydraulic system of the road-block removing vehicle for controlling the lifting and falling of a load. The hydraulic system comprises a telescopic oil cylinder and a bidirectional hydraulic lock, wherein the load is driven to fall when a piston rod of the telescopic oil cylinder stretches outwards, the bidirectional hydraulic lock is arranged on an oil way of the telescopic oil cylinder, and the oil way of a rod port of the telescopic oil cylinder is provided with an oil return backpressure valve. In the hydraulic system, the oil return backpressure valve is arranged on the oil way of the rod port of the telescopic oil cylinder and is used for generating oil return backpressure; when the rod port is in oil return, the oil return process must pass through a throttling valve, the throttling valve has the function of generating liquid resistance, and thus the hydraulic system can be loaded, i.e. the oil return backpressure can be generated; on the basis of the oil return backpressure, smaller influence caused by the gravity of a road-block removing shovel works on the piston rod of the telescopic oil cylinder when the piston rod of the telescopic oil cylinder stretches outwards, the whole stretching process of the piston rod is pushed by hydraulic oil, pressure always exists in a pressure oil way for switching on a hydraulic control one-way valve in the bidirectional hydraulic lock, motions of stretching out and stopping stretching out cannot be carried out in a reciprocating way, and thus the shaking phenomenon generated during a falling process of the load in the background technology can be prevented.
Description
Technical field
The utility model relates to technical field of engineering machinery, the hydraulic system that particularly a kind of remove obstacles vehicle and control load thereof rise and fall.
Background technology
Please refer to Fig. 1-2, Fig. 1 is a kind of structural representation of the shovel of removing obstacles; Fig. 2 is the hydraulic schematic diagram of removing obstacles and scooping up in control chart 1.
The vehicle of removing obstacles has the shovel 21 of removing obstacles, and is generally located at the front end of vehicle.The piston rod of two telescopic oil cylinders 12 is articulated with the middle part of the shovel 11 of removing obstacles, remove obstacles shovel 11 afterbody and the cylinder barrel end of these two telescopic oil cylinders 12 is all articulated with on the vehicle frame of obstacles removing car, Fig. 1 illustrates four pin joints, be respectively the first pin joint 121, second pin joint 122 of two telescopic oil cylinders 12, and the 3rd pin joint 111, the 4th pin joint 112 of obstacles removing car afterbody.
Obviously, when the piston rod of telescopic oil cylinder 12 stretches out, the shovel 11 of removing obstacles falls, with shoveling object; When piston rod is retracted, the shovel 11 of removing obstacles rises, and telescopic oil cylinder 12 is flexible rises and falls to control the shovel 11 of removing obstacles.While pushing away object for fear of the shovel 11 of removing obstacles, telescopic oil cylinder 12 is subject to resistance and bounces back, and bidirectional hydraulic lock 13 can be set on the oil circuit of telescopic oil cylinder 12, as shown in Figure 2.
The operating principle of this hydraulic system is as follows:
1, remove obstacles and shovel 11 whereabouts, telescopic oil cylinder 12 stretches out:
Control reversal valve 14 and switch to right working position, hydraulic oil enters reversal valve 14 from the first hydraulic fluid port P of reversal valve 14 after being flowed out by hydraulic pump 16 pressure port, and flow out from its 3rd hydraulic fluid port A, then enter bidirectional hydraulic lock 13 first hydraulic lock hydraulic fluid port A1, open the first hydraulic control one-way valve 131, now, the pressure of in-line is pushed the second hydraulic control one-way valve 132 of bidirectional hydraulic lock 13 open as pilot pressure, i.e. conducting the 3rd hydraulic lock hydraulic fluid port B1, the 4th hydraulic lock hydraulic fluid port B2.Hydraulic oil flows out from the second hydraulic lock hydraulic fluid port A2 of the first hydraulic control one-way valve 131, enter the rodless cavity of telescopic oil cylinder 12, its rod chamber hydraulic oil enters bidirectional hydraulic lock 13 and flows out from the second hydraulic control one-way valve 132 of having been opened by pilot pressure, and is back to hydraulic oil container 17 through the 4th hydraulic fluid port B, the second hydraulic fluid port T of reversal valve 14.Now, the piston rod of telescopic oil cylinder 12 stretches out.
2, the shovel of removing obstacles 11 hoists, and telescopic oil cylinder 12 is retracted:
Control reversal valve 14 to left working position, hydraulic oil enters from the first hydraulic fluid port P of reversal valve 14 after being flowed out by hydraulic pump 16 pressure port, from the 4th hydraulic fluid port B, flow out, enter the 3rd hydraulic lock hydraulic fluid port B1 of bidirectional hydraulic lock 13, open the second hydraulic control one-way valve 132, now, in-line pressure is pushed the first hydraulic control one-way valve 131 of bidirectional hydraulic lock 13 open as pilot pressure, i.e. conducting the first hydraulic lock hydraulic fluid port A1, the second hydraulic lock hydraulic fluid port A2.Hydraulic oil flows out from the 4th hydraulic lock hydraulic fluid port B2 of the second hydraulic control one-way valve 132, enter the rod chamber of telescopic oil cylinder 12, its rodless cavity hydraulic oil enters bidirectional hydraulic lock 13 and flows out from the first hydraulic control one-way valve 131 of having been opened by pilot pressure, and is back to hydraulic oil container 17 through the 3rd hydraulic fluid port A, the second hydraulic fluid port T of reversal valve 14.Now, the cylinder piston rod of telescopic oil cylinder 12 stretches out.
This hydraulic system is provided with overflow valve 15, and two actuator ports of overflow valve 15 are communicated with respectively pressure port and the oil return line of hydraulic pump 16, to play pressure maintaining effect.
There is following technical problem in technique scheme:
The first, bidirectional hydraulic lock 13 shovel 11 that causes removing obstacles can be shaken when falling.
During whereabouts, telescopic oil cylinder 12 rodless cavity oil-feeds, rod chamber is fuel-displaced, and piston rod stretches out.Due to the existence of piston rod, the oil pump capacity of telescopic oil cylinder 12 will be less than oil inlet quantity.When the rotating speed of hydraulic pump 16 is lower, the oil pump capacity of telescopic oil cylinder 12 is less, and this causes the essentially no back pressure of oil return line, and telescopic oil cylinder 12 is removed obstacles the gravity effect of shovel 11 by obvious, especially removes obstacles shovel 21 weight when larger, and gravity effect is particularly evident.Now, hydraulic oil promotes the speed of telescopic oil cylinder 12 and is unable to catch up with the speed that telescopic oil cylinder 12 is subject to gravity fall, piston rod stretches out after certain hour under hydraulic oil promotes, and no longer by hydraulic oil, promoted, but the shovel 11 of removing obstacles pulls telescopic oil cylinder 12 to fall under Action of Gravity Field.
Now, telescopic oil cylinder 12 in-lines no longer include pressure, and bidirectional hydraulic lock 13 cannot be opened, and oil return line is closed, and stop stretching out of telescopic oil cylinder 12.When telescopic oil cylinder 12 stops stretching out, in-line starts again build-up pressure, and bidirectional hydraulic lock 13 is unlocked, and telescopic oil cylinder 12 continues to stretch out under hydraulic oil promotes.
Visible, the operation cycle of telescopic oil cylinder 12 when falling is: hydraulic oil promotion piston rod stretches out-removes obstacles shovel 11 and pulls stretch out-piston rod of piston rod to stop stretching out.In whole dropping process, above-mentioned circulation repeatedly, thus produced jitter phenomenon.
The second, for stable, two telescopic oil cylinders 12 of operated by rotary motion, and in this system, can not guarantee the synchronous of two telescopic oil cylinders 12, rely on the rigid structures of the shovel 11 of removing obstacles to realize synchronously completely.Under this mode, the stressed variation of two telescopic oil cylinders 12 is larger, affects the life-span of telescopic oil cylinder 12, nor be beneficial to, prevents shake.
The remove obstacles rear end of vehicle can also arrange spade, and the rising and dropping control of spade is consistent with the control principle of the above-mentioned shovel 21 of removing obstacles, and also has the problem of shake and poor synchronization.
In view of this, how to improve the hydraulic system that control load rises and falls, the jitter phenomenon when avoiding, is those skilled in the art's technical problems urgently to be resolved hurrily.
Utility model content
For solving the problems of the technologies described above, the hydraulic system of the purpose of this utility model for providing a kind of remove obstacles vehicle and control load thereof to rise and fall.This hydraulic system can prevent from when load from falling shaking.
The hydraulic system that the control load that the utility model provides rises and falls, comprise telescopic oil cylinder, the piston rod of telescopic oil cylinder drives load to fall while stretching out, also comprise the bidirectional hydraulic lock of being located on described telescopic oil cylinder oil circuit, it is characterized in that, the rod chamber oil circuit of described telescopic oil cylinder is provided with return oil pressure valve.
In this hydraulic system, on telescopic oil cylinder rod chamber oil circuit, be provided with return oil pressure valve, to produce return oil pressure.During rod chamber oil return, must be through choke valve, and choke valve has the function that produces liquid resistance, to system loads, can produce return oil pressure.Based on return oil pressure, when the piston rod of telescopic oil cylinder stretches out, the shovel gravity effect of being removed obstacles is less, the whole process of stretching out of piston rod is all subject to hydraulic oil and promotes, pressure oil circuit exists pressure so that the hydraulic control one-way valve in bidirectional hydraulic lock is opened all the time, can not stretch and back and forth stretch out and stop stretching out, thereby avoid the phenomenon that in the load dropping process described in background technology, generation is shaken.
Preferably, described return oil pressure valve is one-way throttle valve, and the one way valve conducting in-line of described one-way throttle valve is to described telescopic oil cylinder.
Preferably,, the rodless cavity oil circuit of described telescopic oil cylinder is also provided with one-way throttle valve; And the one-way throttle valve that described telescopic oil cylinder rod chamber oil circuit arranges, and the one-way throttle valve of rodless cavity oil circuit setting, all have adjustable throttling.
Preferably, described return oil pressure valve comprises two one way valves that are arranged in parallel, and described in two, the conducting direction of one way valve is contrary.
Preferably, described return oil pressure valve is located between described telescopic oil cylinder and described bidirectional hydraulic lock.
Preferably, also comprise flow divider-combiner; The number of described telescopic oil cylinder is at least two, and the rod chamber oil circuit of all described telescopic oil cylinders is all by same described flow divider-combiner, and/or the rodless cavity oil circuit of all telescopic oil cylinders is all by same described flow divider-combiner.
The utility model also provides a kind of vehicle of removing obstacles, and comprising remove obstacles shovel or spade, and remove obstacles described in controlling shovel or the described spade hydraulic system of rising and falling, and described hydraulic system is the hydraulic system described in above-mentioned any one.
Because above-mentioned hydraulic system has above-mentioned technique effect, the vehicle of removing obstacles with this hydraulic system also has identical technique effect.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the shovel of removing obstacles;
Fig. 2 is the hydraulic schematic diagram of removing obstacles and scooping up in control chart 1;
The hydraulic schematic diagram of hydraulic system the first specific embodiment that Fig. 3 rises and falls for control load that the utility model provides;
The hydraulic schematic diagram of hydraulic system the second specific embodiment that Fig. 4 rises and falls for control load that the utility model provides.
In Fig. 1-2:
11 remove obstacles shovel, 12 telescopic oil cylinders, 13 bidirectional hydraulic locks, 131 first hydraulic control one-way valves, 132 second hydraulic control one-way valves, A1 the first hydraulic lock hydraulic fluid port, A2 the second hydraulic lock hydraulic fluid port, B1 the 3rd hydraulic lock hydraulic fluid port, B2 the 4th hydraulic lock hydraulic fluid port, 14 reversal valves, A the 3rd hydraulic fluid port, B the 4th hydraulic fluid port, P the first hydraulic fluid port, T the second hydraulic fluid port, 15 overflow valves, 16 hydraulic pumps, 17 hydraulic oil containers, 121 first pin joints, 122 second pin joints, 111 the 3rd pin joints, 112 the 4th pin joints
In Fig. 3-4:
21 shovels of removing obstacles, 22 telescopic oil cylinders, 23 bidirectional hydraulic locks, 231 first hydraulic control one-way valves, 232 second hydraulic control one-way valves, C1 the first hydraulic lock hydraulic fluid port, C2 the second hydraulic lock hydraulic fluid port, D1 the 3rd hydraulic lock hydraulic fluid port, D2 the 4th hydraulic lock hydraulic fluid port, 24 reversal valves, C the 3rd hydraulic fluid port, D the 4th hydraulic fluid port, P1 the first hydraulic fluid port, T1 the second hydraulic fluid port, 25 overflow valves, 26 hydraulic pumps, 27 hydraulic oil containers, 281 first one-way throttle valves, 281a the first one way valve, 281b first throttle valve, 282 second one-way throttle valves, 282a the second one way valve, 282b the second choke valve, 29 flow divider-combiners
The specific embodiment
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 3, the hydraulic schematic diagram of hydraulic system the first specific embodiment that Fig. 3 rises and falls for control load that the utility model provides.
This hydraulic system, for rising and falling of control load, load can be the removing obstacles shovel 21 described in background technology, and below the usining shovel of removing obstacles 21 is discussed as specific embodiment, and the load of other kinds (such as the spade of the vehicle of removing obstacles) can be with reference to understanding.Hydraulic system specifically comprises can drive shovel 21 telescopic oil cylinders that rise and fall 22 of removing obstacles, and piston rod stretches out, and the shovel 21 of removing obstacles falls, and piston rod is retracted, and the shovel 21 of removing obstacles hoists; Also comprise the bidirectional hydraulic lock 23 of being located on telescopic oil cylinder 22 oil circuits, the operating principle of bidirectional hydraulic lock 23 can be understood with reference to background technology, telescopic oil cylinder 22 retractions while avoiding removing obstacles shovel 21 application of force, and impact is removed obstacles and is shoveled 21 normal operations.
In the present embodiment, the rod chamber oil circuit of telescopic oil cylinder 22 can arrange return oil pressure valve, to produce return oil pressure.Because telescopic oil cylinder 22 can stretch, therefore when piston rod stretches out, rod chamber oil circuit is oil return line, rodless cavity oil circuit is in-line; When piston rod is retracted, rod chamber oil circuit is in-line, and rodless cavity is oil return line.Therefore, when return oil pressure valve being set on rod chamber oil circuit, needing to guarantee that return oil pressure valve only during as oil return line, produces return oil pressure at it, rod chamber oil circuit during as in-line, does not affect the normal operation of oil circuit.
For reaching this object, return oil pressure valve can be the one-way throttle valve shown in Fig. 3.One-way throttle valve comprises one way valve and the choke valve being arranged in parallel, its one way valve conducting in-line is to telescopic oil cylinder 22, when the oil circuit at one-way throttle valve place is as in-line, hydraulic oil can be opened one way valve, as the one-way throttle valve of return oil pressure valve, do not affect the pressure of in-line, the setup pressure value of one way valve can be selectedly as far as possible little.
In figure, rodless cavity oil circuit and the rod chamber oil circuit of telescopic oil cylinder 22 are equipped with one-way throttle valve, be respectively the first one-way throttle valve 281 and the second one-way throttle valve 282, the first one-way throttle valve 281 comprises the first one way valve 281a, first throttle valve 281b, and the second one-way throttle valve 282 comprises the second one way valve 282a, the second choke valve 282b.
Please refer to Fig. 3, the specific works process of this hydraulic system is as follows:
1, remove obstacles and shovel 21 whereabouts, the piston rod of telescopic oil cylinder 22 stretches out;
Control reversal valve 24 and be positioned at right position.Hydraulic oil self-hydraulic pump 26 pressure port flow out, through reversal valve 24 (the first hydraulic fluid port P1-the 3rd hydraulic fluid port C), flow to the first hydraulic lock hydraulic fluid port C1 of bidirectional hydraulic lock 23, the first hydraulic control one-way valve 231 of bidirectional hydraulic lock 23 is opened, and this in-line is as guide's oil circuit, also open its second hydraulic control one-way valve 232, now, bidirectional hydraulic lock 23 is opened.Hydraulic oil flows to the first one-way throttle valve 281 through the second hydraulic lock hydraulic fluid port C2 of the first hydraulic control one-way valve 231, because the first throttle valve 281b of the first one-way throttle valve 281 can produce larger liquid resistance, hydraulic oil only can overcome the preset pressure of its first one way valve 281a and pass through the first one way valve 281a, and through the first one way valve 281a, flow to the rodless cavity of telescopic oil cylinder 22, promote piston rod and stretch out.
Hydraulic oil in telescopic oil cylinder 22 rod chambers will flow to the second one-way throttle valve 282, its second one way valve 282a conducting direction flows to contrary with hydraulic oil, the second one way valve 282a closes, hydraulic oil only can pass through from the second choke valve 282b of the second one-way throttle valve 282, and the second hydraulic control one-way valve 232 outflows of the bidirectional hydraulic lock through being switched on 23, then be back to hydraulic oil container 27 through reversal valve 24 (the 4th hydraulic fluid port D-the second hydraulic fluid port T1).
2, the shovel of removing obstacles 21 hoists, and the piston rod of telescopic oil cylinder 22 is retracted;
Control reversal valve 24 and be positioned at left position.Hydraulic oil self-hydraulic pump 26 pressure port flow out, through reversal valve 24 (the first hydraulic fluid port P1-the 4th hydraulic fluid port D), flow to the 3rd hydraulic lock hydraulic fluid port D1 of bidirectional hydraulic lock 23, the second hydraulic control one-way valve 232 of bidirectional hydraulic lock 23 is opened, and this in-line is as guide's oil circuit, also open its first hydraulic control one-way valve 231, now, bidirectional hydraulic lock 23 is opened.Hydraulic oil flows to the second one-way throttle valve 282 through the 4th hydraulic lock hydraulic fluid port D2 of the second hydraulic control one-way valve 232, because the second choke valve 282b of the second one-way throttle valve 282 can produce larger liquid resistance, hydraulic oil only can overcome the preset pressure of its second one way valve 282a and pass through the second one way valve 282a, and through the second one way valve 282a, flow to the rod chamber of telescopic oil cylinder 22, promote piston rod and retract.
Hydraulic oil in telescopic oil cylinder 22 rodless cavities will flow to the first one-way throttle valve 281, its first one way valve 281a conducting direction flows to contrary with hydraulic oil, the first one way valve 281a closes, hydraulic oil only can pass through from the first throttle valve 281b of the first one-way throttle valve 281, and the first hydraulic control one-way valve 231 outflows of the bidirectional hydraulic lock through being switched on 23, then be back to hydraulic oil container 27 through reversal valve 24 (the 3rd hydraulic fluid port C-the second hydraulic fluid port T1).
3, the shovel of removing obstacles 21 is held in a predetermined position;
In this embodiment, on telescopic oil cylinder 22 rod chamber oil circuits, be provided with return oil pressure valve, to produce return oil pressure.From said process, during rod chamber oil return, necessary through choke valve, and choke valve has the function that produces liquid resistance, can produce return oil pressure.Based on return oil pressure, when the piston rod of telescopic oil cylinder 22 stretches out, shovel 21 gravity effects of being removed obstacles are less, the whole process of stretching out of piston rod is all subject to hydraulic oil and promotes, pressure oil circuit exists pressure so that the hydraulic control one-way valve in bidirectional hydraulic lock 23 is opened all the time, can back and forth not stretch out and stop stretching out, thereby having avoided the phenomenon that in the load dropping process described in background technology, generation is shaken.
It should be noted that, according to the above-mentioned procedure declaration of rising and falling, only rod chamber oil circuit arranges return oil pressure valve and can realize the shake of anti-whereabouts.The hydraulic schematic diagram of hydraulic system the second specific embodiment that as shown in Figure 4, Fig. 4 rises and falls for control load that the utility model provides.
In this embodiment, the flow path of hydraulic system hydraulic oil is similar to the aforementioned embodiment, has just omitted the one-way throttle valve of rodless cavity oil circuit, during rod chamber oil return, produces back pressure, prevents the shake of load whereabouts.
When rod chamber oil circuit and rodless cavity oil circuit all arrange one-way throttle valve, choke valve can be adjustable throttling.By regulating the opening degree of choke valve, the hoisting or falling speed of the adjustable shovel 21 of removing obstacles.If the choke valve on two oil circuits is regulated respectively according to the Area Ratio of telescopic oil cylinder 22 rod chambers and rodless cavity, the hoisting of shovel 21 that can make to remove obstacles is consistent with falling speed, thus the stability that proof load is risen and fallen.
Except above-mentioned one-way throttle valve, return oil pressure valve can also adopt other structures.Such as, return oil pressure valve can comprise two one way valves that are arranged in parallel, and the conducting direction of two one way valves is contrary.During oil return, oil return line need be set up certain back pressure could be by the one way valve of oil return direction, and two one way valve preset pressure can be chosen or set according to actual condition, and the setting pressure of oil-feed direction is as far as possible little, and oil return direction be take and produced required back pressure as prerequisite.Or return oil pressure valve can be one way valve and the overflow valve 25 being arranged in parallel, one way valve, along the conducting of oil-feed direction, is set up back pressure during oil return and is refluxed to open overflow valve 25.Those skilled in the art can also take the return oil pressure valve of other structures, so that back pressure is set up in oil return, and conducting during oil-feed.
In above-described embodiment, return oil pressure valve is preferably located between telescopic oil cylinder 22 and bidirectional hydraulic lock 23, as shown in Figure 3,4.So design, can guarantee that oil return can form rapidly back pressure, in order to avoid bidirectional hydraulic lock 23 is closed, oil return does not reach return oil pressure valve place, cannot set up effective back pressure.
For the various embodiments described above, this hydraulic system can further include flow divider-combiner 29, and now, the number of telescopic oil cylinder 22 is at least two.Can understand with reference to background technology, two telescopic oil cylinders 22 can provide enough pulling force or thrust, and the rising and falling of shovel 21 that keep removing obstacles is stable, be appreciated that, plural telescopic oil cylinder 22 is also feasible, can determine according to the particular type of load and actual condition, for removing obstacles, 21, two telescopic oil cylinders 22 of shovel can satisfy the demands.
On this basis, the rod chamber oil circuit of all telescopic oil cylinders 22 is all by same flow divider-combiner 29, and/or the rodless cavity oil circuit of all telescopic oil cylinders is all by same flow divider-combiner 29.In Fig. 3, flow divider-combiner 29 is located at rodless cavity oil circuit.When two telescopic oil cylinders 22 are set, the split ratio of flow divider-combiner 29 can be 1: 1, during oil-feed, can uniform distribution hydraulic oil to two telescopic oil cylinder 22, during oil return, can evenly collect hydraulic oil, make the oil inlet quantity of two telescopic oil cylinders 22 and recirculating oil quantity basically identical, thereby guarantee the synchronism of telescopic oil cylinder 22, be also conducive to anti-shake.While being appreciated that the number of variations when telescopic oil cylinder 22, the split ratio of flow divider-combiner 29 can be made accommodation.Flow divider-combiner 29 is arranged to rod chamber oil circuit or rodless cavity oil circuit all can reach same synchronous adjustment effect, while all flow divider-combiner 29 being set on two oil circuits, oil-feed and oil return are synchronously adjusted, more accurate.
In above-described embodiment, overflow valve 25 can be set, two actuator ports of overflow valve 25 are communicated with respectively oil-out and the oil return line of hydraulic pump 26, to play pressure maintaining effect.
The utility model also provides a kind of vehicle of removing obstacles, and comprising the shovel 21 or spade of removing obstacles, and controls the hydraulic system that remove obstacles shovel 21 or spade rise and fall, and described hydraulic system is the hydraulic system described in above-mentioned any one.Because above-mentioned hydraulic system has above-mentioned technique effect, the vehicle of removing obstacles with this hydraulic system also has identical technique effect.
The hydraulic system of above a kind of remove obstacles vehicle and control load thereof provided by the utility model being risen and fallen is all described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (7)
1. the hydraulic system that control load rises and falls, comprise telescopic oil cylinder (22), the piston rod of telescopic oil cylinder (22) drives load to fall while stretching out, also comprise the bidirectional hydraulic lock of being located on described telescopic oil cylinder (22) oil circuit, it is characterized in that, the rod chamber oil circuit of described telescopic oil cylinder (22) is provided with return oil pressure valve.
2. hydraulic system as claimed in claim 1, is characterized in that, described return oil pressure valve is one-way throttle valve, and the one way valve conducting in-line of described one-way throttle valve is to described telescopic oil cylinder (22).
3. hydraulic system as claimed in claim 2, is characterized in that, the rodless cavity oil circuit of described telescopic oil cylinder (22) is also provided with one-way throttle valve; And the one-way throttle valve that described telescopic oil cylinder (22) rod chamber oil circuit arranges, and the one-way throttle valve of rodless cavity oil circuit setting, all have adjustable throttling.
4. hydraulic system as claimed in claim 1, is characterized in that, described return oil pressure valve comprises two one way valves that are arranged in parallel, and described in two, the conducting direction of one way valve is contrary.
5. hydraulic system as claimed in claim 1, is characterized in that, described return oil pressure valve is located between described telescopic oil cylinder (22) and described bidirectional hydraulic lock (23).
6. the hydraulic system as described in claim 1-5 any one, is characterized in that, also comprises flow divider-combiner (29); The number of described telescopic oil cylinder (22) is at least two, the rod chamber oil circuit of all described telescopic oil cylinders (22) is all by same described flow divider-combiner (29), and/or the rodless cavity oil circuit of all telescopic oil cylinders (22) is all by same described flow divider-combiner (29).
7. the vehicle of removing obstacles, comprises remove obstacles shovel (21) or spade, and remove obstacles described in controlling shovel (21) or the described spade hydraulic system of rising and falling, and it is characterized in that, described hydraulic system is the hydraulic system described in claim 1-6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445897.XU CN203429680U (en) | 2013-07-24 | 2013-07-24 | Road-block removing vehicle and hydraulic system thereof for controlling lifting and falling of load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445897.XU CN203429680U (en) | 2013-07-24 | 2013-07-24 | Road-block removing vehicle and hydraulic system thereof for controlling lifting and falling of load |
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| Publication Number | Publication Date |
|---|---|
| CN203429680U true CN203429680U (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320445897.XU Expired - Fee Related CN203429680U (en) | 2013-07-24 | 2013-07-24 | Road-block removing vehicle and hydraulic system thereof for controlling lifting and falling of load |
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| CN (1) | CN203429680U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006018A (en) * | 2014-05-22 | 2014-08-27 | 江苏大学 | Bending machine hydraulic synchronous system controlled by flow distributing and collecting valve |
| CN105508328A (en) * | 2015-12-23 | 2016-04-20 | 新兴重工集团有限公司 | Hydraulic control system for light high-mobility emergency and assault breacher vehicle |
| CN105862962A (en) * | 2016-05-31 | 2016-08-17 | 青岛雷沃挖掘机有限公司 | Hydraulic circuit for reducing oil return backpressure |
| CN107131164A (en) * | 2017-05-23 | 2017-09-05 | 上海应用技术大学 | The hydraulic control system and method for elevating mechanism |
| CN108716497A (en) * | 2018-07-28 | 2018-10-30 | 蚌埠液力机械有限公司 | A kind of tilting oil cylinder of fork duty testing device |
| CN113108298A (en) * | 2021-04-25 | 2021-07-13 | 胜利油田胜机石油装备有限公司 | Hydraulic turning chimney and movable steam injection boiler |
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2013
- 2013-07-24 CN CN201320445897.XU patent/CN203429680U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006018A (en) * | 2014-05-22 | 2014-08-27 | 江苏大学 | Bending machine hydraulic synchronous system controlled by flow distributing and collecting valve |
| CN105508328A (en) * | 2015-12-23 | 2016-04-20 | 新兴重工集团有限公司 | Hydraulic control system for light high-mobility emergency and assault breacher vehicle |
| CN105862962A (en) * | 2016-05-31 | 2016-08-17 | 青岛雷沃挖掘机有限公司 | Hydraulic circuit for reducing oil return backpressure |
| CN105862962B (en) * | 2016-05-31 | 2018-05-18 | 青岛雷沃工程机械有限公司 | Reduce the hydraulic circuit of return oil pressure |
| CN107131164A (en) * | 2017-05-23 | 2017-09-05 | 上海应用技术大学 | The hydraulic control system and method for elevating mechanism |
| CN108716497A (en) * | 2018-07-28 | 2018-10-30 | 蚌埠液力机械有限公司 | A kind of tilting oil cylinder of fork duty testing device |
| CN113108298A (en) * | 2021-04-25 | 2021-07-13 | 胜利油田胜机石油装备有限公司 | Hydraulic turning chimney and movable steam injection boiler |
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