CN209430507U - Engineering machinery hydraulic system and engineering machinery - Google Patents
Engineering machinery hydraulic system and engineering machinery Download PDFInfo
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- CN209430507U CN209430507U CN201822171287.0U CN201822171287U CN209430507U CN 209430507 U CN209430507 U CN 209430507U CN 201822171287 U CN201822171287 U CN 201822171287U CN 209430507 U CN209430507 U CN 209430507U
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- 239000012530 fluid Substances 0.000 claims description 70
- 238000010276 construction Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 59
- 230000000694 effects Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The utility model discloses an engineering machine tool hydraulic system and engineering machine tool relates to the engineering machine tool field for realize the real-time tensioning of chain in the engineering machine tool working process. The engineering machinery hydraulic system comprises a hydraulic pump, a control valve group, a first execution element and a second execution element. The first actuating element is connected with the hydraulic pump through the control valve group; the second actuator is connected with the hydraulic pump through the control valve group and is used for tensioning the chain wound on the first actuator. Wherein the control valve block is configured to supply oil to the first and second actuators simultaneously. According to the technical scheme, the control valve group is arranged, and in the working process of the first execution element, the control valve group continuously supplies oil to the first execution element and the second execution element. As soon as the chain is loosened, the second actuator pushes the chain to move, tensioning the chain. The technical scheme realizes real-time tensioning of the chain.
Description
Technical field
The utility model relates to engineering machinery fields, and in particular to a kind of construction machinery hydraulic system and engineering machinery.
Background technique
With the rapid growth of domestic and international infrastructure investment, builds to foundation engineering project is more and more, multifunctional drill
One of equipment as capital construction foundation construction, frequency of use also will more and more frequently.
Multifunctional drill realizes the tensioning of the chain using clamping system.Specifically, clamping system is realized by mechanical system
The tensioning of the chain comprising chain, connector, pin shaft, screw rod, nut, screw holder and hold-down support.Wherein, chain
It is connect by pin shaft with connector, screw rod is connect by screw thread with connector, and screw rod is fixed by nut and screw holder, spiral shell
Bar fixing seat is connect by hold-down support with power head carriage, and screw holder can rotate in hold-down support.When chain pine
It is dynamic, chain tension is realized by adjusting nut.
Inventors have found that at least there are following problems in the prior art: first, during power head moves back and forth, by
In the shaking of chain, connector and screw rod is made to form whole by irregular force, the root for be easy to causeing connector to connect with screw rod
Portion's fracture, forms insecurity factor.Second, which need to be adjusted narrow space, be not easy by manually being adjusted using spanner
It adjusts.Third, for the clamping system since space limits, adjusting stroke is relatively small, after reaching adjusting travel limit, can not continue
It adjusts, causes chain relaxation, influence construction efficiency.4th, real-time tensioning demand, serious shadow can not be implemented using the tensioning apparatus
Ring service life of chain and construction efficiency.
Utility model content
The utility model proposes a kind of construction machinery hydraulic system and engineering machinery, to realize that engineering machinery is worked
The real-time tensioning of chain in journey.
The utility model provides a kind of construction machinery hydraulic system, comprising:
Hydraulic pump；
Control valve group；
First executive component is connect by the control valve group with the hydraulic pump；And
Second executive component is connect by the control valve group with the hydraulic pump, and second executive component is for opening
The chain wound on tight first executive component；
Wherein, the control valve group is configured to supply to first executive component and second executive component simultaneously
Oil.
In some embodiments, first executive component includes:
Power head；
Workpiece is drivingly connected with the power head；And
Brake, for braking the workpiece, wherein the brake is in oil inlet state, the workpiece
It is unlocked.
Wherein, the control valve group is configured to execute to the workpiece, the brake and described second simultaneously
Element fuel feeding.
In some embodiments, the control valve group includes:
Reversal valve, including oil inlet, oil return opening, the first actuator port and the second actuator port；And
Inserted valve, including the first hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port, the 4th hydraulic fluid port and the 5th hydraulic fluid port；First oil
Mouth is connect with the hydraulic fluid port of first actuator port, the hydraulic fluid port of second executive component and the brake, and described second
Hydraulic fluid port is connect with second actuator port；The third hydraulic fluid port is connect with the first of the workpiece；4th oil
It mouthful is connect with second mouthful of the workpiece；The hydraulic fluid port and the braking of 5th hydraulic fluid port and second executive component
The hydraulic fluid port of device connects.
In some embodiments, the inserted valve includes:
First valve group is set between first hydraulic fluid port and second hydraulic fluid port；And
Second valve group is set to first hydraulic fluid port, second hydraulic fluid port, second executive component and the brake
Between.
In some embodiments, first valve group includes:
First check valve, the oil inlet of first check valve are connect with first hydraulic fluid port, first check valve
Oil outlet is connect with the first of the workpiece, and first check valve is for controlling oil liquid via the first hydraulic fluid port list
To the first for being flowed into the workpiece；And
Pilot valve, the oil inlet of the pilot valve are connect with the first of the workpiece, the pilot valve it is fuel-displaced
It mouthful is connect with second mouthful of the workpiece, second mouthful and institute of the control port of the pilot valve and the workpiece
State the second actuator port connection of reversal valve.
In some embodiments, the control port of the pilot valve is equipped with throttle valve.
In some embodiments, second valve group includes:
Shuttle valve, the first oil inlet of the shuttle valve are connect with the first actuator port of the reversal valve, and the of the shuttle valve
Second mouthful of two oil inlets and the second actuator port of the reversal valve and the workpiece is connect, the shuttle valve it is fuel-displaced
Mouth is connect with the hydraulic fluid port of second executive component.
In some embodiments, second valve group further include:
Pressure reducing valve, between the oil outlet of the shuttle valve and the hydraulic fluid port of second executive component.
In some embodiments, second valve group further include:
Logical valve, between the oil outlet of the pressure reducing valve and the hydraulic fluid port of second executive component.
In some embodiments, the logical valve includes two-position three-way valve.
In some embodiments, the reversal valve includes three-position four-way valve.
In some embodiments, the workpiece includes hydraulic motor, and the hydraulic motor is configured as driving power
Head lifting.
In some embodiments, second executive component includes one-way cylinder.
In some embodiments, the hydraulic fluid port of second executive component is equipped with oil return circuit, and the oil return circuit is equipped with
Regulating valve.
In some embodiments, the regulating valve includes overflow valve.
Another embodiment of the utility model provides a kind of engineering machinery, including any technical solution of the utility model is provided
Construction machinery hydraulic system.
In some embodiments, engineering machinery further include:
Chain is wound in first executive component；And
Support device supports the chain；
Wherein, second executive component and the support device are drivingly connected, in the chain-loose, to support institute
It is mobile to state support device, to be tensioned the chain.
In some embodiments, engineering machinery further include:
Guiding device, is equipped with the support device, and the guiding device is used to provide for the movement of the support device
Guiding.
In some embodiments, the guiding device includes slideway.
In some embodiments, the support device includes:
Support frame；And
Idler wheel is supported with the chain, and is installed on support frame as described above.
In some embodiments, the engineering machinery includes drilling machine.
The construction machinery hydraulic system that above-mentioned technical proposal provides is provided with control valve group, and in the first executive component work
During work, control valve group continues to the first executive component and the second executive component fuel feeding.Second executive component is for being tensioned the
The chain wound on one executive component, as long as chain-loose, the second executive component pushes chain mobile, with tension chain.On
Stating technical solution realizes the real-time tensioning of chain.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is the construction machinery hydraulic system schematic illustration that an embodiment of the present invention provides；
Fig. 2 is the partial structural diagram at the engineering machinery tension position that another embodiment of the utility model provides.
Specific embodiment
Below with reference to FIG. 1 to FIG. 2, technical scheme provided by the present invention will be described in more detail.
For the technical solution convenient for introducing the utility model embodiment, for above-mentioned hydraulic system is used in drilling machine.
Referring to Fig. 1, Fig. 2, the utility model provides a kind of construction machinery hydraulic system, including hydraulic pump 1, control valve group
2, the first executive component 3 and the second executive component 4.First executive component 3 is connect by control valve group 2 with hydraulic pump 1；Second
Executive component 4 is connect by control valve group 2 with hydraulic pump 1, and the second executive component 4 is wound for being tensioned on the first executive component 3
Chain 6.Wherein, control valve group 2 is configured to simultaneously to 4 fuel feeding of the first executive component 3 and the second executive component.
When multifunctional drilling machine power head can be made to move back and forth by the system, the real-time tension chain 6 of tensioning apparatus is realized.
Screw rod is tightened in the prior art for replacement by the way of hydraulic oil control, efficiently solves what screw rod in tensioning apparatus was easily broken off
Problem improves the safety and reliability of complete machine.Also, use the tensioning apparatus, efficiently solve screw rod be not easy adjust and
Adjust the short problem of stroke.
Referring to Fig. 1, in some embodiments, the first executive component 3 include power head (not shown go out), workpiece 31 with
And brake 32.Workpiece 31 and power head are drivingly connected；Brake 32 is used for braking operation component 31.Wherein, brake
32 are in oil inlet state, and workpiece 31 is unlocked.Wherein, control valve group 2 is configured to simultaneously to workpiece 31, brake
32 and 4 fuel feeding of the second executive component.
As shown in Figure 1, the unilateral oil inlet of brake 32.After oil inlet, oil liquid pushes the brake bar of brake 32 mobile, with de-
From the first executive component 3, the first executive component 3 is specially hydraulic motor.After disengaging, oil that hydraulic motor is conveyed in hydraulic pump 1
The lower rotation of liquid effect.Hydraulic motor rotation, drives power head stretching motion.During power head stretching motion, it is wrapped in power
Chain 6 on head may loosen.But as long as chain 6 loosens, the second execution unit 4 in the case where oil liquid that hydraulic pump 1 convey acts on,
Chain 6 can be push to move towards the direction of tensioner, to realize chain tensioner.Brake 32 is in not oil inlet state, in brake
Under the effect of 32 contained springs, the brake bar of brake 32 stretches out, braking operation component 31.
Referring to Fig. 1, control valve group 2 includes reversal valve 21 and inserted valve 22.Reversal valve 21 includes oil inlet P, oil return opening
T, the first actuator port A and the second actuator port B.Inserted valve 22 includes the first hydraulic fluid port V1, the second hydraulic fluid port V2, third hydraulic fluid port
C1, the 4th hydraulic fluid port C2 and the 5th hydraulic fluid port M.First hydraulic fluid port V1 is connect with the first actuator port A.Second hydraulic fluid port V2 and the second work
Make hydraulic fluid port B connection；Third hydraulic fluid port C1 is connect with the first K1 of workpiece 31；The of 4th hydraulic fluid port C2 and workpiece 31
Two mouthfuls of K2 connections.5th hydraulic fluid port M is connect with the hydraulic fluid port of the hydraulic fluid port a of the second executive component 4 and brake 32.
Reversal valve 21 rotates and reverse for realizing hydraulic motor described hereinafter.Reversal valve 21 includes three-position four-way valve.
Referring to Fig. 1, in some embodiments, inserted valve 22 includes the first valve group 221 and the second valve group 222.First valve
Group 221 is set between the first hydraulic fluid port V1 and the second hydraulic fluid port V2.Second valve group 222 is set to the first hydraulic fluid port V1, the second hydraulic fluid port V2, second
Between executive component 4 and brake 32.
First valve group 221 is configured as the first K1 fuel feeding to the first executive component 3.In some embodiments, first
Valve group 221 is configurable for forming two oil circuits, and it is in running order that two oil circuits select one.When hydraulic motor rotates forward, first
To the unidirectional fuel feeding of first K1 of the first executive component 3, Article 2 oil circuit do not work for oil circuit.When hydraulic motor inverts, from the
The oil liquid of the first K1 output of one executive component 3 is back to fuel tank 11 via Article 2 oil circuit.
Referring to Fig. 1, in some embodiments, the first valve group 221 includes the first check valve 223 and pilot valve 224.The
The oil inlet P of one check valve 223 is connect with the first hydraulic fluid port V1, the oil outlet of the first check valve 223 and the first of workpiece 31
Mouth K1 connection, the first check valve 223 is for controlling the first that oil liquid is unidirectionally flowed into workpiece 31 via the first hydraulic fluid port V1
K1.The oil inlet P of pilot valve 224 is connect with the first K1 of workpiece 31, the oil outlet and workpiece 31 of pilot valve 224
Second mouthful of K2 connection, the control port of pilot valve 224 and second mouthful of K2 of workpiece 31 and the second work of reversal valve 21
Make hydraulic fluid port B connection.
Referring to Fig. 1, the first check valve 223 is on first oil circuit of the first valve group 221, is executed for realizing to first
The unidirectional oil inlet of first K1 of element 3.
Referring to Fig. 1, pilot valve 224 is on the Article 2 oil circuit of the first valve group 221.The control port of pilot valve 224 with
Second mouthful of K2 connection of workpiece 31, also connect with the second hydraulic fluid port V2 of inserted valve 22.Second hydraulic fluid port V2's of inserted valve 22
The unlatching of oil pressure cntrol pilot valve 224, closed state.
Referring to Fig. 1, in some embodiments, the second valve group 222 include shuttle valve 225, the first oil inlet a of shuttle valve 225 with
Second actuator port B of the first actuator port A connection of reversal valve 21, the second oil inlet b of shuttle valve 225 and reversal valve 21 with
And second mouthful of K2 connection of workpiece 31, the oil outlet c of shuttle valve 225 are connect with the hydraulic fluid port a of the second executive component 4.
Referring to Fig. 1, in some embodiments, the second valve group 222 further includes pressure reducing valve 226, and pressure reducing valve 226 is set to shuttle valve
Between 225 oil outlet c and the hydraulic fluid port a of the second executive component 4.
Pressure reducing valve 226 to enter the second execution unit 4 and the pressure of the oil liquid in brake 32 is met the requirements.
Referring to Fig. 1, in some embodiments, the second valve group 222 further includes logical valve 227, and logical valve 227 is set to pressure reducing valve
Between 226 oil outlet and the hydraulic fluid port a of the second executive component 4.
Referring to Fig. 1, logical valve 227 uses two-position three-way valve, and when it is in the left position in Fig. 1, the second execution unit 4 is in
Oil inlet state, to realize the real-time tensioner of chain 6.Brake 32 is also at oil inlet state, to realize the solution of workpiece 31
Lock.When it is in the right position in Fig. 1, the second execution unit 4 is in draining state, to loosen chain 6 in time.Brake 32 is also located
In draining state, so that brake 32 is closed completely, effectively to lock workpiece 31.
Above-mentioned technical proposal, the second valve group 222 use pressure reducing valve 226 are applied in combination with logical valve 227, are feeding it
When hydraulic system works, suitable pressure is provided to brake 32 and tensioning apparatus；It can be in time in off-load pipeline when not working
Pressure, brake brake 32 in time, chain 6 loosens in time, improves 6 service life of chain.
In some embodiments, workpiece 31 includes hydraulic motor, and hydraulic motor is configured as driving power head lifting.
In some embodiments, the second executive component 4 includes one-way cylinder.Second executive component, 4 oil inlet, oil return are all logical
Cross the same hydraulic fluid port a.
Referring to Fig. 1, in some embodiments, the hydraulic fluid port a of the second executive component 4 is equipped with oil return circuit, sets on oil return circuit
There is regulating valve 5, to realize draining as required.
In some embodiments, regulating valve 5 includes one of: overflow valve, sequence valve or logic control valve.
Below with reference to Fig. 1 and Fig. 2, the action process of above-mentioned construction machinery hydraulic system is introduced.Fuel tank 11 respectively with it is hydraulic
The T mouth connection of the inlet port of pump 1, the T mouth of reversal valve 21 and hydraulic motor.The oil outlet of hydraulic pump 1 and the P mouth of reversal valve 21
Connection；A, B mouth of reversal valve 21 are connected with V1, V2 of inserted valve 22 mouth respectively.C1, C2 mouth of inserted valve 22 respectively with liquid
The import hydraulic fluid port of pressure motor is connected.The M mouth of inserted valve 22 is respectively the same as the A mouth phase of the m mouth of brake 32 and second one-way valve 10
Even；The T mouth of inserted valve 22 is connected with the T mouth of T mouthfuls of hydraulic motor and regulating valve 5 respectively.The B mouth of second one-way valve 10 respectively with tune
The P mouth for saving valve 5 is connected and a mouth of the second executive component (tensioning hydro-cylinder) 4 is connected.
When drilling machine feeding, V1 oil inlet, power head rises.Hydraulic pump 1 gives hydraulic horse by reversal valve 21 and inserted valve 22
It reaches, brake 32 and tensioning hydro-cylinder provide power.It is commutated by control reversal valve 21, opens brake 32, realize hydraulic motor
Positive and negative rotation, to realize the elevating movement back and forth of drill power head.At the same time, V1, V2 mouthfuls of high pressure oil by shuttle valve 225,
Pressure reducing valve 226 and logical valve 227 provide suitable cracking pressure to brake 32 respectively, provide suitable tensioning to tensioning hydro-cylinder
Power.When V2 oil inlet, the decentralization of power head quick and stable is realized in power head decline by the first valve group 221 and throttle valve 12.
The concrete principle of auto-tensioning feeding hydraulic system action process are as follows: when the work of drilling machine feed system, hydraulic pressure system
System provides power to hydraulic motor, brake 32 and tensioning hydro-cylinder by hydraulic pump 1 and inserted valve 22.Brake 32 is opened, and is moved
The realization of power head moves back and forth.Meanwhile it being pre-tightened by second one-way valve 10 to tensioning hydro-cylinder is oil-filled, and pass through 5 He of regulating valve
Second one-way valve 10 locks the oil in tensioning hydro-cylinder, realizes tensioning pressure maintaining.When the power that 6 moment of feed chain bears passes through idler wheel 72
When being transferred to tensioning hydro-cylinder more than 5 setting value of regulating valve, regulating valve 5 is opened, so that protection chains 6 and tensioning apparatus are not broken
It is bad.Therefore, when drilling machine is worked, tensioning apparatus can feed hydraulic system by auto-tensioning and is tensioned.
When tensioning hydro-cylinder is tensioned, oil circuit non-return is carried out using second one-way valve, is conducive to overflow valve and is limited into cylinder pressure, no
It is excessive and damage to be also effectively prevented from tensioning apparatus stress for the effect for only playing tensioning.
Above-mentioned technical proposal, when realizing multifunctional drilling machine power head and moving back and forth, tensioning apparatus is tensioned in real time；Make simultaneously
Tensioning apparatus must be tensioned to be less likely to be damaged, easily adjust and adjust stroke is long.
Another embodiment of the utility model provides a kind of engineering machinery, including any technical solution of the utility model is provided
Construction machinery hydraulic system.
Referring to fig. 2, in some embodiments, engineering machinery further includes chain 6 and support device 7.Chain 6 is wound in
One executive component 3；Support device 7 supports chain 6.Wherein, the second executive component 4 is drivingly connected with support device 7, in chain
When 6 loosening, the movement of support device 7 is supported, with tension chain 6.
Second executive component 4 includes one-way cylinder.First executive component 3 includes hydraulic motor and power head.Hydraulic horse
Up to driving power head lifting.
Referring to fig. 2, engineering machinery further includes guiding device 8, and guiding device 8 is equipped with support device 7, and guiding device 8 is used
Guiding is provided in the movement for support device 7, so that the movement of support device 7 is steady.
Referring to fig. 2, in some embodiments, guiding device 8 includes slideway.Second executive component 4 pushes 7 edge of support device
Guiding device 8 slide.
Referring to fig. 2, in some embodiments, support device 7 includes support frame 71 and idler wheel 72, idler wheel 72 and chain 6
It supports, and is installed on support frame 71.
Referring to fig. 2, chain 6 is around on idler wheel 72；Tensioning hydro-cylinder one end is fixed on support frame 71, and brill is fixed in one end
Mast.Support frame 71 is connected and fixed by pin shaft with idler wheel 72.When the relaxation of feed chain 6, pass through tensioning hydro-cylinder pushing rolling wheels 72
It is moved along slideway, to realize the tensioning of feed chain 6.
In some embodiments, engineering machinery includes drilling machine.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is only the utility model and simplified description for ease of description, rather than indicates or imply meaning
Device or element must have a particular orientation, construct and operate for specific orientation, thus should not be understood as practical new to this
The limitation of type protection content.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, but these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (21)
1. a kind of construction machinery hydraulic system characterized by comprising
Hydraulic pump (1)；
Control valve group (2)；
First executive component (3) is connect by the control valve group (2) with the hydraulic pump (1)；And
Second executive component (4) is connect by the control valve group (2) with the hydraulic pump (1), second executive component
(4) for being tensioned the chain (6) wound on first executive component (3)；
Wherein, the control valve group (2) is configured to simultaneously to first executive component (3) and second executive component
(4) fuel feeding.
2. construction machinery hydraulic system according to claim 1, which is characterized in that first executive component (3) includes:
Power head；
Workpiece (31) is drivingly connected with the power head；And
Brake (32), for braking the workpiece (31), wherein the brake (32) is in oil inlet state, described
Workpiece (31) is unlocked；
Wherein, the control valve group (2) is configured to simultaneously to the workpiece (31), the brake (32) and described
Two executive components (4) fuel feeding.
3. construction machinery hydraulic system according to claim 2, which is characterized in that the control valve group (2) includes:
Reversal valve (21), including oil inlet, oil return opening, the first actuator port and the second actuator port；And
Inserted valve (22), including the first hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port, the 4th hydraulic fluid port and the 5th hydraulic fluid port；First oil
Mouth is connect with first actuator port；Second hydraulic fluid port is connect with second actuator port；The third hydraulic fluid port and institute
State the first connection of workpiece (31)；Second mouthful of 4th hydraulic fluid port and the workpiece (31) is connect；Described
Five hydraulic fluid ports are connect with the hydraulic fluid port of the hydraulic fluid port of second executive component (4) and the brake (32).
4. construction machinery hydraulic system according to claim 3, which is characterized in that the inserted valve (22) includes:
First valve group (221) is set between first hydraulic fluid port and second hydraulic fluid port；And
Second valve group (222) is set to first hydraulic fluid port, second hydraulic fluid port, second executive component (4) and the system
Between dynamic device (32).
5. construction machinery hydraulic system according to claim 4, which is characterized in that first valve group (221) includes:
The oil inlet of first check valve (223), first check valve (223) is connect with first hydraulic fluid port, and described first is single
It is connect to the oil outlet of valve (223) with the first of the workpiece (31), first check valve (223) is for controlling oil
Liquid is unidirectionally flowed into the first of the workpiece (31) via the first hydraulic fluid port of first valve group (221)；And
The oil inlet of pilot valve (224), the pilot valve (224) is connect with the first of the workpiece (31), the elder generation
Second mouthful of the oil outlet of pilot valve (224) and the workpiece (31) is connect, the control port of the pilot valve (224) and institute
State second mouthful of workpiece (31) and the second actuator port connection of the reversal valve (21).
6. construction machinery hydraulic system according to claim 5, which is characterized in that the control oil of the pilot valve (224)
Mouth is equipped with throttle valve (12).
7. construction machinery hydraulic system according to claim 4, which is characterized in that second valve group (222) includes:
First oil inlet of shuttle valve (225), the shuttle valve (225) is connect with the first actuator port of the reversal valve (21), institute
State the of the second oil inlet of shuttle valve (225) and second actuator port of the reversal valve (21) and the workpiece (31)
Two mouthfuls of connections, the oil outlet of the shuttle valve (225) are connect with the hydraulic fluid port of second executive component (4).
8. construction machinery hydraulic system according to claim 7, which is characterized in that second valve group (222) further include:
Pressure reducing valve (226) is set between the oil outlet of the shuttle valve (225) and the hydraulic fluid port of second executive component (4).
9. construction machinery hydraulic system according to claim 8, which is characterized in that second valve group (222) further include:
Logical valve (227) is set between the oil outlet of the pressure reducing valve (226) and the hydraulic fluid port of second executive component (4).
10. construction machinery hydraulic system according to claim 9, which is characterized in that the logical valve (227) includes two
Triple valve.
11. construction machinery hydraulic system according to claim 3, which is characterized in that the reversal valve (21) includes three
Four-way valve.
12. construction machinery hydraulic system according to claim 2, which is characterized in that the workpiece (31) includes liquid
Pressure motor, the hydraulic motor are configured as that the power head is driven to go up and down.
13. construction machinery hydraulic system according to claim 1, which is characterized in that second executive component (4) includes
One-way cylinder.
14. construction machinery hydraulic system according to claim 1, which is characterized in that the oil of second executive component (4)
Mouth is equipped with oil return circuit, and the oil return circuit is equipped with regulating valve (5).
15. construction machinery hydraulic system according to claim 14, which is characterized in that the regulating valve (5) includes overflow
Valve.
16. a kind of engineering machinery, which is characterized in that including any construction machinery hydraulic system of claim 1~15.
17. engineering machinery according to claim 16, which is characterized in that further include:
Chain (6) is wound in first executive component (3)；And
Support device (7) supports the chain (6)；
Wherein, second executive component (4) and the support device (7) are drivingly connected, with when the chain (6) loosen,
The support device (7) movement is supported, to be tensioned the chain (6).
18. engineering machinery according to claim 17, which is characterized in that further include:
Guiding device (8) is equipped with the support device (7), and the guiding device (8) is used for as the support device (7)
It is mobile that guiding is provided.
19. engineering machinery according to claim 18, which is characterized in that the guiding device (8) includes slideway.
20. engineering machinery according to claim 18, which is characterized in that the support device (7) includes:
Support frame (71)；And
Idler wheel (72) is supported with the chain (6), and is installed on support frame as described above (71).
21. engineering machinery according to claim 16, which is characterized in that the engineering machinery includes drilling machine.
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| CN201822171287.0U CN209430507U (en) | 2018-12-24 | 2018-12-24 | Engineering machinery hydraulic system and engineering machinery |
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| CN201822171287.0U CN209430507U (en) | 2018-12-24 | 2018-12-24 | Engineering machinery hydraulic system and engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109458365A (en) * | 2018-12-24 | 2019-03-12 | 江苏徐工工程机械研究院有限公司 | Engineering machinery hydraulic system and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458365A (en) * | 2018-12-24 | 2019-03-12 | 江苏徐工工程机械研究院有限公司 | Engineering machinery hydraulic system and engineering machinery |
| CN109458365B (en) * | 2018-12-24 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Engineering machinery hydraulic system and engineering machinery |
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