CN106151135B - Concrete pumping hydraulic control system and concrete pumping machine - Google Patents
Concrete pumping hydraulic control system and concrete pumping machine Download PDFInfo
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- CN106151135B CN106151135B CN201510204341.5A CN201510204341A CN106151135B CN 106151135 B CN106151135 B CN 106151135B CN 201510204341 A CN201510204341 A CN 201510204341A CN 106151135 B CN106151135 B CN 106151135B
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- 238000005086 pumping Methods 0.000 title claims abstract description 242
- 239000003921 oil Substances 0.000 claims abstract description 504
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 117
- 238000011010 flushing procedure Methods 0.000 claims description 36
- 239000002828 fuel tank Substances 0.000 claims description 24
- 230000005611 electricity Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The invention relates to the technical field of engineering machinery, and discloses a concrete pumping hydraulic control system and a concrete pumping machine, wherein the concrete pumping hydraulic control system comprises a closed pump assembly, a first pumping oil cylinder and a second pumping oil cylinder, the closed pump assembly comprises a first oil outlet communicated with a rodless cavity of the first pumping oil cylinder and a second oil outlet communicated with a rodless cavity of the second pumping oil cylinder, and a rod cavity of the first pumping oil cylinder is communicated with a rod cavity of the second pumping oil cylinder; further comprising: the control valve is arranged on an oil path between the rod cavity of the first pumping oil cylinder and the rod cavity of the second pumping oil cylinder; and the control assembly is used for acquiring the supporting load information of the first pumping oil cylinder and the second pumping oil cylinder when the concrete pumping machine is stopped so as to control the closed pump assembly to pump hydraulic oil to the rodless cavity of the pumping oil cylinder in a supporting load state. The concrete pumping hydraulic control system can be stopped in time, has higher safety, and further improves the stability of concrete pumping machinery.
Description
Technical field
The present invention relates to technical field of engineering machinery, more particularly to a kind of concrete pumping hydraulic control system and concrete
Pumping machine.
Background technology
Concrete pumping hydraulic control system is the control system suitable for concrete pumping machinery, is poured applied to high level
Deng in construction；In concrete pumping hydraulic system, how to solve concrete pumping hydraulic control system waits for that material slips asking for cylinder
Topic is that those skilled in the art need consider emphasis in the design process.
It refers to that clout of the concrete pumping hydraulic system in delivery pipe when expecting flows back, because conducting oneself with dignity to make to slip cylinder when material
The phenomenon that obtaining the telescopic rod retraction of the pumping oil cylinder in concrete pumping equipment.
Currently, concrete pumping hydraulic system generally comprises tool, there are two the enclosed pump group part of oil outlet, the first pumping oil
The rodless cavity of cylinder, the second pumping oil cylinder and distribution tilt cylinder, the first pumping oil cylinder is connected to an oil outlet of enclosed pump group part,
The rodless cavity of second pumping oil cylinder is connected to another oil outlet of enclosed pump group part, the first pumping oil cylinder and the second pumping oil cylinder
Rod chamber be interconnected；Those skilled in the art treat the solution party for waiting for that material slips cylinder when designing concrete pumping hydraulic system
Case is all to install two-way plug-in valve additional in enclosed pump group part and one of oil inlet oil circuit pumped between oil cylinder, works as concrete pump
Send hydraulic system to need to close above-mentioned two-way plug-in valve when expecting, so block between enclosed pump group part and the pumping oil cylinder into
Oil circuit, to lock the pumping oil cylinder.
By taking two-way plug-in valve is installed on the oil circuit between enclosed pump group part and the first pumping oil cylinder as an example, above-mentioned solution party
In case, when concrete pumping hydraulic system is when expecting, distribution tilt cylinder need to swing back the first pumping oil cylinder side always, so that locking
First pumping oil cylinder carry load, that is, when concrete pumping machinery is shut down by concrete when the second pumping oil cylinder carry load
Hydraulic system of pump still needs to act so that distribution tilt cylinder need to swing back the first pumping oil cylinder side always, has certain security risk, leads
Cause the stability of concrete pumping machinery poor.
Invention content
The present invention provides a kind of concrete pumping hydraulic control system and concrete pumping machinery, the concrete pump liquor chargings
Safety is higher when pressing system job, and then improves the stability of concrete pumping machinery.
In order to achieve the above objectives, the present invention provides following technical scheme：
A kind of concrete pumping hydraulic control system, including enclosed pump group part, the first pumping oil cylinder, the second pumping oil cylinder,
The enclosed pump group part include with first pumping oil cylinder rodless cavity be connected to the first oil outlet, with second pump oil cylinder without bar
Second oil outlet of chamber connection passes through between the rod chamber of the first pumping oil cylinder and the rod chamber of the second pumping oil cylinder
Oil circuit connection；Further include：
It is set between the rod chamber of the first pumping oil cylinder and the rod chamber of the second pumping oil cylinder on oil circuit
Control valve；The control valve disconnects the first pumping oil cylinder rod chamber when being in the first station pumps oil cylinder with described second
Rod chamber between oil circuit, be connected to when in second station it is described first pumping oil cylinder rod chamber with it is described second pumping oil
Oil circuit between the rod chamber of cylinder；
Control assembly is connect with the enclosed pump group part signal, described in being obtained when concrete pumping machinery is shut down
First pumping oil cylinder and second pumping oil cylinder support load information, with control the enclosed pump group part to first pumping oil cylinder and
The rodless cavity pumps hydraulic oil of pumping oil cylinder in support load condition in second pumping oil cylinder.
In above-mentioned concrete pumping hydraulic control system, during concrete pumping machinery pump concrete, adjust
Above-mentioned control valve is to second station, in turn, the rod chamber of the first pumping oil cylinder of concrete pumping hydraulic system and the second pumping
Oil communication between the rod chamber of oil cylinder, enclosed pump group part can control the first pumping oil cylinder and second pumping cylinder action into
Row concrete pumping works；When concrete pumping machinery is shut down when expecting, adjusts above-mentioned control valve and be in the first station, at this point,
Control valve disconnects the oil circuit between the rod chamber of the first pumping oil cylinder and the rod chamber of the second pumping oil cylinder, to make the first pump
The oil mass in cylinder rod chamber and the oil mass in the second pumping cylinder rod chamber is sent no longer to change；Meanwhile concrete pumping machine
The working condition of enclosed pump group part just makes a pumping oil in the first pumping oil cylinder and the second pumping oil cylinder before tool is shut down
Cylinder is in the state of support load, and control assembly can obtain the support load letter of the first pumping oil cylinder and the second pumping oil cylinder
Breath pumps the pumping oil cylinder in support load condition in oil cylinder to control enclosed pump group part to the first pumping oil cylinder and second
Rodless cavity pumps hydraulic oil, and then make concrete pumping machinery during to be expected in the first pumping oil cylinder and the second pumping oil cylinder
The rodless cavity of the pumping oil cylinder of state in support load maintains certain pressure, so that the pump of the state in support load
Oil cylinder is sent to lock, wherein：
When the first pumping oil cylinder is in the state of support load, enclosed pump group part works on, and makes and the first pumping oil
The oil pressure of first oil outlet of the rodless cavity connection of cylinder maintains certain pressure, at this point, in the first pumping oil cylinder in rodless cavity
Oil pressure in oil pressure and rod chamber is used to support load, and due to the first rod chamber of pumping oil cylinder and having for the second pumping oil cylinder
Oil circuit between rod cavity is cut off by control valve, and the first pumping oil cylinder is locked up.
When the second pumping oil cylinder is in support load condition, enclosed pump group part works on, and makes and the second pumping oil cylinder
The oil pressure of the second oil outlet of rodless cavity connection maintain certain pressure, at this point, the oil in the second pumping oil cylinder in rodless cavity
Oil pressure in pressure and rod chamber is used to support load, and due to the rod chamber of the second pumping oil cylinder and first pump oil cylinder have bar
Oil circuit between chamber is cut off by control valve, and the second pumping oil cylinder is locked up.
Therefore, above-mentioned concrete pumping hydraulic control system is in when material state, and the either first pumping oil cylinder is in
Load condition or the second pumping oil cylinder is supported to be in support load condition, concrete pumping hydraulic control system can stop in time
Machine, safety is higher, and then improves the stability of concrete pumping machinery.
Preferably, the enclosed pump group part includes servo valve, main pump and main pump aperture oil cylinder；Servo valve and control group
Part signal connects, and the servo valve is connect with main pump aperture oil cylinder by oil circuit to control the oil inlet of the main pump aperture oil cylinder
And/or oil return, the piston rod of the main pump aperture oil cylinder connect with the main pump and control the discharge capacity and gyratory directions of main pump, institute
State the automatically controlled end at the servo valve both ends of the control assembly according to concrete pumping machinery in a cycle before shutdown
Electricity and power failure state obtain the support load information.
Preferably, the enclosed pump group part further includes slippage pump and flushing valve；Wherein：
First hydraulic fluid port of the main pump is connected to first oil outlet, and the second hydraulic fluid port is connected to second oil outlet；
The inlet port of the slippage pump is connected to fuel tank, oil outlet be connected to the first hydraulic fluid port of the main pump and with it is described
Second hydraulic fluid port of main pump is connected to, and between the oil outlet of the slippage pump and the first hydraulic fluid port of the main pump pipeline be equipped with it is fuel-displaced
Mouthful towards the main pump the first hydraulic fluid port check valve, and between the oil outlet of the slippage pump and the second hydraulic fluid port of the main pump
Pipeline is equipped with check valve of the oil outlet towards the second hydraulic fluid port of the main pump, and the oil outlet of the slippage pump is equipped with first
Overflow valve；
The flushing valve includes spool and valve body, the valve body have the first hydraulic fluid port being connected to first oil outlet,
The second hydraulic fluid port being connected to second oil outlet, the third hydraulic fluid port being connected to fuel tank；Wherein, when the oil of first oil outlet
When pressure is more than the oil pressure of the second oil outlet, the flushing valve is in the first working condition, the second hydraulic fluid port of the flushing valve and institute
State the connection of third hydraulic fluid port；When the oil pressure of second oil outlet is more than the oil pressure of the first oil outlet, the flushing valve is in the
Two working conditions, the first hydraulic fluid port of the flushing valve are connected to the third hydraulic fluid port；
The servo valve has the first hydraulic fluid port being connected to the oil outlet of the slippage pump, second be connected to fuel tank oil
Mouth, the third hydraulic fluid port being connected to described main pump aperture oil cylinder one end, the 4th oil being connected to the main pump aperture oil cylinder other end
Mouthful；When the servo valve is in the first working condition, the first hydraulic fluid port of the servo valve is connected to third hydraulic fluid port, the second hydraulic fluid port
It is connected to the 4th hydraulic fluid port；When the servo valve is in the second working condition, the first hydraulic fluid port and the 4th hydraulic fluid port of the servo valve
Connection, the second hydraulic fluid port are connected to third hydraulic fluid port；When the servo valve is in third working condition, the first oil of the servo valve
It is interconnected between mouth, the second hydraulic fluid port, third hydraulic fluid port and the 4th hydraulic fluid port；The servo valve passes through between three kinds of working conditions
Switching so that control discharge capacity and gyratory directions that the main pump aperture oil cylinder adjusts the main pump.
Preferably, the flushing valve further includes：
The first oil pocket between the spool and the valve body, second between the spool and the valve body
Oil pocket；First oil pocket is connected to first oil outlet, and second oil pocket is connected to second oil outlet, when described
The oil pressure of first oil pocket pushes the spool to the second oil pocket Slideslip to the flushing when being more than the oil pressure of second oil pocket
Valve is in the first working condition；When the oil pressure of second oil pocket is more than the oil pressure of the first oil pocket, oil in second oil pocket
Pressure pushes the spool to be in the second working condition to the first oil pocket Slideslip to the flushing valve.
Preferably, further include：
Shuttle valve, the first oil inlet of the shuttle valve are connected to first oil outlet, the second oil inlet of the shuttle valve with
The second oil outlet connection；
The oil outlet for being set to the shuttle valve is oily between first oil outlet and second oil outlet for acquiring
The pressure sensor of the oil pressure of larger oil outlet is pressed, signal connects between the pressure sensor and the control assembly, institute
It states control assembly and controls the aperture of the servo valve so that main pump for the pressure information that is acquired according to the pressure sensor
Discharge capacity meets system load demand.
Preferably, further include：
The oil return line being set between the oil outlet and fuel tank of the shuttle valve, the pressure sensor are set to described return
On oil pipe line；
It is set to the oil return line and the second overflow valve between the pressure sensor and the fuel tank；
It is set to the hydraulic control one-way valve on oil return line and between second overflow valve and the pressure sensor,
And when the control valve is in second station the hydraulic control one-way valve close, when the control valve is in the first station described in
Hydraulic control one-way valve is opened.
Preferably, the pipeline between second overflow valve and fuel tank is equipped with radiator.
Preferably, the pipeline connection between the oil outlet of the flushing valve and second overflow valve and the radiator.
Preferably, the control valve is two-way plug-in valve.
Preferably, the hydraulic control system further includes reversal valve, and the reversal valve has the first oil being connected to oil sources
Mouth, the second hydraulic fluid port being connected to the oil inlet of the two-way plug-in valve, the third hydraulic fluid port being connected to the fuel tank, when the commutation
When valve is in the first working condition, the first hydraulic fluid port of the reversal valve is connected to the second hydraulic fluid port, when the reversal valve is in second
When working condition, the third hydraulic fluid port of the reversal valve is connected to the second hydraulic fluid port.
Preferably, described when the concrete pumping hydraulic control system includes the second overflow valve and hydraulic control one-way valve
The first guide cavity of hydraulic control one-way valve is connected to the second hydraulic fluid port of the reversal valve.
The present invention also provides a kind of concrete pumping machinery, which includes being carried in above-mentioned technical proposal
Any concrete pumping hydraulic control system supplied.
Description of the drawings
Fig. 1 is the oil circuit schematic diagram of concrete pumping hydraulic control system provided by the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1, wherein Fig. 1 is the oil circuit schematic diagram of concrete pumping hydraulic control system provided by the invention.
As shown in Figure 1, concrete pumping hydraulic control system provided in an embodiment of the present invention includes enclosed pump group part 1,
One pumping oil cylinder 2, second pumps oil cylinder 3, and enclosed pump group part 1 includes first be connected to the rodless cavity 21 of the first pumping oil cylinder 2
Oil outlet A, the second oil outlet B be connected to the rodless cavity 31 of the second pumping oil cylinder 3, the rod chamber 22 of the first pumping oil cylinder 2 and
Pass through oil circuit connection between the rod chamber 32 of second pumping oil cylinder 3；Above-mentioned concrete pumping hydraulic control system further includes：
The rod chamber 22 and second for being set to the first pumping oil cylinder 2 pumps control between the rod chamber 32 of oil cylinder 3 on oil circuit
Valve 4 processed, the control valve 4 includes the first station and second station, and when control valve 4 is in the first station, control valve 4 disconnects first
The oil circuit between the rod chamber 32 of the pumping oil cylinder 3 of rod chamber 22 and second of oil cylinder 2 is pumped, when control valve 4 is in second station,
The rod chamber 22 and second of the connection of control valve 4 first pumping oil cylinder 2 pumps the oil circuit between the rod chamber 32 of oil cylinder 3；
Control assembly is connect with the enclosed pump group part signal, described in being obtained when concrete pumping machinery is shut down
First pumping oil cylinder 2 and second pumps the support load information of oil cylinder 3, to control the enclosed pump group part to the first pumping oil cylinder
2 and second pump in oil cylinder 3 in the rodless cavity pumps hydraulic oil for pumping oil cylinder for supporting load condition.
Whether the load information includes pumping oil cylinder in support load condition.The support load condition refers to working as
When concrete pumping machinery is shut down, concrete cylinder and the S pipe, the concrete pipeline that pump oil cylinder and concrete pumping machinery connect
It is logical, at this point, the concrete in concrete delivery pipe generates certain pressure to the piston for pumping oil cylinder under the effect of gravity, at this time
Pumping oil cylinder i.e. be in load condition.
It should be noted that the time of above-mentioned " when concrete pumping machinery is shut down " can be that concrete pumping machinery stops
It can also be the certain time after concrete pumping machinery shutdown while only pumping.
In above-mentioned concrete pumping hydraulic control system, during concrete pumping machinery pump concrete, adjust
Above-mentioned control valve 4 is in second station, in turn, the rod chamber 22 of the first pumping oil cylinder 2 of concrete pumping hydraulic control system
And second pumping oil cylinder 3 rod chamber 32 between oil communication, enclosed pump group part 1 can control the first pumping oil cylinder 2 and the
The two pumping actions of oil cylinder 3 carry out concrete pumping work；When concrete pumping machinery is shut down when expecting, above-mentioned control valve 4 is adjusted
In the first station, at this point, control valve 4 by the rod chamber 22 and second of the first pumping oil cylinder 2 pump oil cylinder 3 rod chamber 32 it
Between oil circuit disconnect；Meanwhile the working condition of enclosed pump group part 1 just makes the first pumping oily before concrete pumping machinery shutdown
Cylinder 2 and second pumps the state that a pumping oil cylinder in oil cylinder 3 is in support load, and control assembly can obtain the first pumping
Oil cylinder 2 and second pumps the support load information of oil cylinder 3, is pumped to the first pumping oil cylinder 2 and second with controlling enclosed pump group part 1
The rodless cavity pumps hydraulic oil of pumping oil cylinder in support load condition in oil cylinder 3, and then concrete pumping machinery is made to wait for
The first pumping oil cylinder 2 and second pumps the rodless cavity dimension of the pumping oil cylinder of the state in support load in oil cylinder 3 during material
Certain pressure is held, so that the pumping oil cylinder locking of the state in support load, wherein：
When the first pumping oil cylinder 2 is in support load condition, as shown in fig. 1, enclosed pump group part 1 works on, and makes
The oil pressure for the first oil outlet A being connected to the rodless cavity 21 of the first pumping oil cylinder 2 maintains certain pressure, at this point, the first pumping
Oil pressure in 2 rodless cavity 21 of oil cylinder is to support load, and the rod chamber 22 and second for pumping oil cylinder 2 due to first pumps oil cylinder 3
Rod chamber 32 between oil circuit cut off by control valve 4, first pumping oil cylinder 2 is locked up.
Similarly, when the second pumping oil cylinder 3 is in support load condition, enclosed pump group part 1 works on, and makes and the second pump
The oil pressure for the second oil outlet B that the rodless cavity 31 of oil cylinder 3 is connected to is sent to maintain certain pressure, at this point, the second pumping oil cylinder 3 is without bar
Oil pressure in chamber 31 can support load, and since the rod chamber 32 and first of the second pumping oil cylinder 3 pumps the rod chamber of oil cylinder 2
Oil circuit between 22 is cut off by control valve 4, and the second pumping oil cylinder 3 is locked up.
Therefore, above-mentioned concrete pumping hydraulic control system is in when material state, and the either first pumping oil cylinder 2 is in
Load condition or the second pumping oil cylinder 3 is supported to be in support load condition, concrete pumping hydraulic control system can be in time
It shuts down, safety is higher, and then improves the stability of concrete pumping machinery.
Further, enclosed pump group part 1 include servo valve 15, main pump 11 and main pump aperture oil cylinder 16, servo valve 15 with
Control assembly signal connects, and the servo valve 15 is connect with main pump aperture oil cylinder 16 by oil circuit, opened for controlling the main pump
The oil inlet and/or oil return of oil cylinder 16 are spent, the main pump aperture oil cylinder 16 is used to control the discharge capacity and gyratory directions of main pump 11.Institute
It includes the first automatically controlled end and the second automatically controlled end to state servo valve 15, when the first automatically controlled end obtains electric, the main pump aperture oil cylinder 16
Left chamber (left side of Fig. 1) oil inlet, at this point, the main pump aperture oil cylinder 16 control main pump to the first oil outlet A fuel feeding, and control into
The discharge capacity of main pump 11 can be controlled by entering the fluid amount of the left chamber of the main pump aperture oil cylinder 16.When the second automatically controlled end obtains electric, institute
Left chamber (right side of Fig. 1) oil inlet of main pump aperture oil cylinder 16 is stated, at this point, the main pump aperture oil cylinder 16 controls main pump 11 to second
Oil outlet B fuel feeding.Therefore, need to only judge the automatically controlled end of servo valve 15 electric must can judge main pump 11 to which with power failure state
A pumping oil cylinder pumps hydraulic oil.Therefore, in the present embodiment, control assembly can be stopped according to servo valve 15 in concrete pumping machinery
The electric and power failure state that obtains at the automatically controlled end in a cycle before machine obtains the first pumping oil cylinder 2 and second pumping oil cylinder 3
Support load information.For example, when in a cycle before concrete pumping machinery shutdown, the first automatically controlled end of servo valve 15
Electric and the second automatically controlled end dead electricity when, show to shut down in the previous period main pump to the first pumping 2 pumps hydraulic oil of oil cylinder, when stopping
When machine, it is described first pumping oil cylinder 2 i.e. be in load condition, can similarly obtain the second automatically controlled end of servo valve 15 obtain it is electric and first
When automatically controlled end dead electricity, the second pumping oil cylinder 3 is in load condition.
Specifically, as shown in Figure 1, enclosed pump group part 1 further include, slippage pump 12, flushing valve 10；Wherein：
First hydraulic fluid port of main pump 11 is connected to the first oil outlet A, and the second hydraulic fluid port is connected to the second oil outlet B；
The inlet port of slippage pump 12 is connected to fuel tank, oil outlet be connected to the first hydraulic fluid port of main pump 11 and with main pump 11
Second hydraulic fluid port is connected to, and pipeline is equipped with oil outlet towards main pump between the oil outlet of slippage pump 12 and the first hydraulic fluid port of main pump 11
The check valve 14 of 11 the first hydraulic fluid port, and between the oil outlet of slippage pump 12 and the second hydraulic fluid port of main pump 11 pipeline be equipped with it is fuel-displaced
Check valve 13 of the mouth towards the second hydraulic fluid port of main pump 11；And the oil outlet of slippage pump 12 is equipped with the first overflow valve 17；
Flushing valve 10 includes spool and valve body, valve body have the first hydraulic fluid port being connected to the first oil outlet A, with it is second fuel-displaced
Second hydraulic fluid port of mouth B connections, the third hydraulic fluid port being connected to fuel tank；Wherein, when the oil pressure of the first oil outlet A is more than the second oil outlet
When the oil pressure of B, flushing valve 10 is in the first working condition, and the second hydraulic fluid port of flushing valve 10 is connected to third hydraulic fluid port；Go out when second
When the oil pressure of hydraulic fluid port B is more than the oil pressure of the first oil outlet A, flushing valve 10 is in the second working condition, the first oil of flushing valve 10
Mouth is connected to third hydraulic fluid port；
Servo valve 15 have be connected to the oil outlet of slippage pump 12 the first hydraulic fluid port, be connected to fuel tank the second hydraulic fluid port, and
The third hydraulic fluid port of 16 1 cavity of main pump aperture oil cylinder connection, the 4th hydraulic fluid port being connected to 16 another cavity of main pump aperture oil cylinder；When
When servo valve 15 is in the first working condition (the first automatically controlled end obtains electric, the second automatically controlled end dead electricity), the first oil of servo valve 15
Mouth is connected to third hydraulic fluid port, and the second hydraulic fluid port is connected to the 4th hydraulic fluid port；(the second electricity when servo valve 15 is in the second working condition
Control end obtains electric, the first automatically controlled end dead electricity), the first hydraulic fluid port of servo valve 15 is connected to the 4th hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port
Connection；When servo valve 15 is in third working condition (the second automatically controlled end and the first automatically controlled equal dead electricity in end), the of servo valve 15
It is interconnected between one hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port and the 4th hydraulic fluid port；Servo valve 15 by three kinds of working conditions it
Between switching by main pump aperture oil cylinder 16 adjust main pump 11 in swash plate angle, and then adjust main pump 11 discharge capacity, make main pump
11 discharge capacity meets the demand of oil pressure in the rodless cavity of the pumping oil cylinder in support load condition in system.
In the enclosed pump group part of above structure, servo valve 15 can be adjusted by controlling main pump aperture oil cylinder 16 in main pump 11
The angle of swash plate, therefore, concrete pumping machinery is shut down wait expecting before servo valve 15 working condition can reflect enclosed pump
Working condition of the component 1 before concrete pumping machinery shutdown, such as the direction of rotation of enclosed pump group part 1 and discharge capacity, therefore,
Control assembly connect with 15 signal of servo valve and can be shut down according to concrete pumping machinery in a cycle before waiting expecting
The working condition of servo valve 15 judge the working condition of enclosed pump group part 1, also, control assembly is by making servo valve 15 maintain
Working condition in a cycle before concrete pumping machinery shutdown can make enclosed pump group part 1 maintain concrete pump
Send the working condition before machine down time.
It should be noted that " a cycle " refers to that concrete cylinder carries out a continuous suction or discharging process, this
Process corresponds to the retraction of the piston rod of pumping oil cylinder or stretches out process.
Meanwhile in the enclosed pump group part of above structure, either the oil pressure of the first oil outlet A is more than the second oil outlet B's
The oil pressure of oil pressure or the second oil outlet B are more than the oil pressure of the first oil outlet A, as long as the first oil outlet A and the second oil outlet B
Between oil pressure have differences, the high temperature oil in the relatively low lateral line of oil pressure can be put back to fuel tank by flushing valve 10, simultaneously lead to
It crosses slippage pump 12 and supplements cold oil into the lower lateral line of oil pressure, and then can cool down in time to enclosed pump group part 1.
More specifically, in order to improve change of the flushing valve 10 according to oil pressure relationship between the first oil outlet A and the second oil outlet B
Change regulating the speed between two kinds of working conditions, above-mentioned flushing valve 10 further includes：
The first oil pocket between spool and valve body, the second oil pocket between spool and valve body；First oil pocket with
First oil outlet A connections, the second oil pocket are connected to the second oil outlet B, when the oil pressure of the first oil pocket is more than the oil pressure of the second oil pocket
When push spool be in the first working condition to the second oil pocket Slideslip to flushing valve 10；When the oil pressure of the second oil pocket is more than first
When the oil pressure of oil pocket, oil pressure pushes spool to be in the second work shape to the first oil pocket Slideslip to flushing valve 10 in the second oil pocket
State.
The flushing valve 10 of above structure can be according to the variation of oil pressure relationship between the first oil outlet A and the second oil outlet B
The adjust automatically between two kinds of working conditions, so can improve flushing valve 10 according to the first oil outlet A and the second oil outlet B it
Between oil pressure relationship the speed that is adjusted between two kinds of working conditions of variation.
Specifically, in order to reduce output power of the main pump 11 in the case where waiting for material state in enclosed pump group part 1, above-mentioned concrete pump
Liquor charging pressure control system further includes shuttle valve 8 and pressure sensor 18；
Wherein, the first oil inlet of shuttle valve 8 is connected to the first oil outlet A, and the second oil inlet is connected to the second oil outlet B；
Pressure sensor 18 is connected to the oil outlet of shuttle valve 8, and pressure sensor 18 is connect with control assembly signal, control
Component is used to control the aperture of servo valve 15 according to the pressure information that pressure sensor 18 acquires, and then makes swash plate in main pump 11
Angle can maintain the required pressure value of system load so that the discharge capacity of main pump 11 meets system load demand.Specifically
Collected pressure is sent to control assembly by ground, pressure sensor 18, which is generated corresponding control by control assembly
Electric current controls the discharge capacity of main pump 11 to servo valve 15.
Preferably, it is quick on the draw to main pump in enclosed pump group part to reduce in above-mentioned concrete pumping hydraulic control system
The requirement of degree, above-mentioned concrete pumping hydraulic control system further include：
The oil return line being set between the oil outlet and fuel tank of shuttle valve 8, pressure sensor 18 are set on oil return line；
It is set to oil return line and the second overflow valve 5 between pressure sensor 18 and fuel tank；
It is set to the hydraulic control one-way valve 6 on oil return line and between the second overflow valve 5 and pressure sensor 18, and is worked as
Hydraulic control one-way valve 6 is closed when control valve 4 is in second station, when control valve 4 is in the first station, hydraulic control one-way valve 6 is opened.
When the first pumping oil cylinder 2 is in the state of support load, as shown in fig. 1, with the first pumping oil cylinder 2 without bar
The oil pressure for the first oil outlet A that chamber 21 is connected to is more than the oil for the second oil outlet B being connected to the rodless cavity 31 of the second pumping oil cylinder 3
Pressure, at this point, the first oil inlet unlatching be connected to the first oil outlet A in shuttle valve 8, while shuttle valve 8 is connected to the second oil outlet B
Second oil inlet is closed, also, since the hydraulic control one-way valve 6 between the oil outlet of shuttle valve 8 and the second overflow valve 5 is in opening state
State, therefore, the pressure for the oil return line being connected to shuttle valve 8 are controlled by the oil pressure relief value that the second overflow valve 5 is set, theoretically,
The oil pressure relief value is equal to the oil pressure of 8 oil outlet of shuttle valve, meanwhile, the oil pressure at the first oil outlet A and 8 oil outlet of shuttle valve
Oil pressure is essentially identical, and the oil pressure in the first pumping 2 rodless cavity 21 of oil cylinder is identical as the oil pressure at the first oil outlet A, so pressure
What the pressure value that force snesor 18 detects reflected is the oil pressure in 2 rodless cavity 21 of the first pumping oil cylinder, therefore, as long as by second
Overflow valve 5 sets suitable oil pressure relief value (for example, pumping stops the rodless cavity pressure value of previous cycle), pressure sensor 18
Its collected pressure is fed back to control assembly so that main pump 11 constantly adjusts discharge capacity with by 8 oil outlet of shuttle valve in real time
The oil pressure that pressure maintains in the OK range of the oil pressure relief value in the first pumping 2 rodless cavity 21 of oil cylinder can be used for supporting
Load, and since the oil circuit between the rod chamber 32 of the pumping oil cylinder 3 of rod chamber 22 and second of the first pumping oil cylinder 2 is by control valve
4 cut-outs, the first pumping oil cylinder 2 are locked up.
Similarly, it when the second pumping oil cylinder 3 is in support load condition, is connected to the rodless cavity 31 of the second pumping oil cylinder 3
The oil pressure of the second oil outlet B be more than the oil pressure of the first oil outlet A being connected to the rodless cavity 21 of the first pumping oil cylinder 2, at this point,
The second oil inlet being connected to the second oil outlet B in shuttle valve 8 is opened, while the first oil inlet being connected to the first oil outlet A closes
It closes, also, since the hydraulic control one-way valve 6 between the oil outlet of shuttle valve 8 and the second overflow valve 5 is in open state, with shuttle
The pressure of the oil return line of 8 unicom of valve is controlled by the oil pressure relief value that the second overflow valve 5 is set, theoretically, the oil pressure relief value
Equal to the oil pressure of 8 oil outlet of shuttle valve, meanwhile, the basic phase of oil pressure of oil pressure and 8 oil outlet of shuttle valve at the second oil outlet B
Together, so, what the pressure value that pressure sensor 18 detects reflected is the oil pressure in 3 rodless cavity 31 of the second pumping oil cylinder, therefore,
As long as the second overflow valve 5 is set suitable oil pressure relief value (for example, pumping stops the rodless cavity pressure value of previous cycle), the
Oil pressure in two pumping 3 rodless cavities 31 of oil cylinder can be used for supporting load, and due to the rod chamber 31 and the of the second pumping oil cylinder 3
Oil circuit between the rod chamber 21 of one pumping oil cylinder 2 is cut off by control valve 4, and the second pumping oil cylinder 3 is locked up.
Its minimum overflow pressure value can be arranged in second overflow valve 5 according to operating mode, and main pump 11 is transferred in support load shape
The oil pressure that first pumping oil cylinder 2 or second of state pumps oil cylinder 3 disclosure satisfy that the pressure value needed for system load.
In a kind of preferred embodiment, as shown in Figure 1, the pipeline between the second overflow valve 5 and fuel tank is equipped with radiator
9。
Radiator 9 can cool down the fluid in the oil circuit by radiator 9, to the deep fat pair in reduction system
The influence of fuel tank inner fluid temperature.
It is highly preferred that as shown in Figure 1, when enclosed pump group part 1 include flushing valve 10 when, the oil outlet of flushing valve 10 and second
Pipeline connection between overflow valve 5 and radiator 9.The fluid being discharged by 10 oil outlet of flushing valve also passes through radiator 9 and cools down
It is just discharged into fuel tank later, to further decrease influence of the deep fat in system to fuel tank inner fluid temperature.
On the basis of the respective embodiments described above, in a kind of embodiment, it is set to the rod chamber 22 of the first pumping oil cylinder 2
Control valve 4 between the rod chamber 32 of the second pumping oil cylinder 3 on oil circuit can be two-way plug-in valve.
On the basis of the respective embodiments described above, in a kind of embodiment, as shown in Figure 1, the hydraulic control system is also
Including：
Reversal valve 7, reversal valve 7 have the first hydraulic fluid port being connected to oil sources, the be connected to the oil inlet of two-way plug-in valve
Two hydraulic fluid ports, the third hydraulic fluid port being connected to fuel tank, when reversal valve 7 is in the first working condition, the first hydraulic fluid port of reversal valve 7 and
Two hydraulic fluid ports are connected to, and when reversal valve 7 is in the second working condition, the third hydraulic fluid port of reversal valve 7 is connected to the second hydraulic fluid port.
Preferably, above-mentioned reversal valve 7 can be two valves, can also be three-position valve, as shown in fig. 1, above-mentioned reversal valve
For two-position three way magnetic valve.
Certainly, when concrete pumping hydraulic control system includes the second overflow valve 5 and hydraulic control one-way valve 6, fluid-control one-way
The first guide cavity of valve 6 can be connected to the second hydraulic fluid port of above-mentioned reversal valve 7.
The present invention also provides a kind of concrete pumping machinery, which includes being carried in above-mentioned technical proposal
Any concrete pumping hydraulic control system supplied.
Obviously, those skilled in the art can carry out the embodiment of the present invention various modification and variations without departing from this hair
Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies
Within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of concrete pumping hydraulic control system, including enclosed pump group part, the first pumping oil cylinder, the second pumping oil cylinder, institute
It includes the first oil outlet being connected to the rodless cavity of the first pumping oil cylinder, the rodless cavity with the second pumping oil cylinder to state enclosed pump group part
Second oil outlet of connection passes through oil between the rod chamber of the first pumping oil cylinder and the rod chamber of the second pumping oil cylinder
Road connects；It is characterized in that, further including：
It is set to the control on oil circuit between the rod chamber of the first pumping oil cylinder and the rod chamber of the second pumping oil cylinder
Valve；The control valve disconnects the rod chamber of the first pumping oil cylinder and having for the second pumping oil cylinder when being in the first station
Oil circuit between rod cavity, the control valve are connected to the rod chamber and described second of the first pumping oil cylinder when being in second station
Pump the oil circuit between the rod chamber of oil cylinder；
Control assembly is connect with the enclosed pump group part signal, for obtaining described first when concrete pumping machinery is shut down
The support load information of pumping oil cylinder and the second pumping oil cylinder pumps oil cylinder and second to control the enclosed pump group part to first
Pump the rodless cavity pumps hydraulic oil of the pumping oil cylinder in support load condition in oil cylinder.
2. concrete pumping hydraulic control system according to claim 1, which is characterized in that the enclosed pump group part includes
Servo valve, main pump and main pump aperture oil cylinder；Servo valve is connect with control assembly signal, and the servo valve by oil circuit with
Main pump aperture oil cylinder is connected to control the oil inlet and/or oil return of the main pump aperture oil cylinder, the piston of the main pump aperture oil cylinder
Bar connect with the main pump and controls the discharge capacity and gyratory directions of main pump, and the control assembly is being stopped according to concrete pumping machinery
The electric and power failure state that obtains at the automatically controlled end at the servo valve both ends in a cycle before machine obtains the support load information.
3. concrete pumping hydraulic control system according to claim 2, which is characterized in that the enclosed pump group part is also wrapped
Include slippage pump and flushing valve；Wherein：
First hydraulic fluid port of the main pump is connected to first oil outlet, and the second hydraulic fluid port is connected to second oil outlet；
The inlet port of the slippage pump is connected to fuel tank, oil outlet be connected to the first hydraulic fluid port of the main pump and with the main pump
The second hydraulic fluid port connection, and between the oil outlet of the slippage pump and the first hydraulic fluid port of the main pump pipeline be equipped with oil outlet court
To the check valve of the first hydraulic fluid port of the main pump, and pipeline between the oil outlet of the slippage pump and the second hydraulic fluid port of the main pump
It is equipped with check valve of the oil outlet towards the second hydraulic fluid port of the main pump, and the oil outlet of the slippage pump is equipped with the first overflow
Valve；
The flushing valve includes spool and valve body, and the valve body has the first hydraulic fluid port being connected to first oil outlet and institute
The second hydraulic fluid port for stating the connection of the second oil outlet, the third hydraulic fluid port being connected to fuel tank；Wherein, when the oil pressure of first oil outlet is big
When the oil pressure of the second oil outlet, the flushing valve is in the first working condition, the second hydraulic fluid port of the flushing valve and described the
Three hydraulic fluid ports are connected to；When the oil pressure of second oil outlet is more than the oil pressure of the first oil outlet, the flushing valve is in the second work
Make state, the first hydraulic fluid port of the flushing valve is connected to the third hydraulic fluid port；
The servo valve have be connected to the oil outlet of the slippage pump the first hydraulic fluid port, be connected to fuel tank the second hydraulic fluid port, and
The third hydraulic fluid port of main pump aperture oil cylinder one end connection, the 4th hydraulic fluid port being connected to the main pump aperture oil cylinder other end；When
When the servo valve is in the first working condition, the first hydraulic fluid port of the servo valve is connected to third hydraulic fluid port, the second hydraulic fluid port and
Four hydraulic fluid ports are connected to；When the servo valve is in the second working condition, the first hydraulic fluid port of the servo valve is connected to the 4th hydraulic fluid port,
Second hydraulic fluid port is connected to third hydraulic fluid port；When the servo valve is in third working condition, the first hydraulic fluid port of the servo valve,
It is interconnected between two hydraulic fluid ports, third hydraulic fluid port and the 4th hydraulic fluid port；The servo valve passes through cutting between three kinds of working conditions
Swap-in and control discharge capacity and gyratory directions that the main pump aperture oil cylinder adjusts the main pump.
4. concrete pumping hydraulic control system according to claim 3, which is characterized in that the flushing valve further includes：
The first oil pocket between the spool and the valve body, the second oil between the spool and the valve body
Chamber；First oil pocket is connected to first oil outlet, and second oil pocket is connected to second oil outlet, when described
The oil pressure of one oil pocket pushes the spool to the second oil pocket Slideslip to the flushing valve when being more than the oil pressure of second oil pocket
In the first working condition；When the oil pressure of second oil pocket is more than the oil pressure of the first oil pocket, oil pressure in second oil pocket
The spool is pushed to be in the second working condition to the first oil pocket Slideslip to the flushing valve.
5. concrete pumping hydraulic control system according to claim 3, which is characterized in that further include：
Shuttle valve, the first oil inlet of the shuttle valve are connected to first oil outlet, the second oil inlet of the shuttle valve with it is described
Second oil outlet is connected to；
Be set to the oil outlet of the shuttle valve for acquire between first oil outlet and second oil outlet oil pressure compared with
The pressure sensor of the oil pressure of big oil outlet, signal connects between the pressure sensor and the control assembly, the control
Component processed be used for the pressure information that is acquired according to the pressure sensor control the servo valve aperture so that main pump discharge capacity
Meet system load demand.
6. concrete pumping hydraulic control system according to claim 5, which is characterized in that further include：
The oil return line being set between the oil outlet and fuel tank of the shuttle valve, the pressure sensor are set to the oil return pipe
On the road；
It is set to the oil return line and the second overflow valve between the pressure sensor and the fuel tank；
It is set to the hydraulic control one-way valve on oil return line and between second overflow valve and the pressure sensor, and is worked as
The control valve is in the hydraulic control one-way valve closing, the hydraulic control when the control valve is in the first station when second station
Check valve is opened.
7. concrete pumping hydraulic control system according to claim 6, which is characterized in that second overflow valve and oil
Pipeline between case is equipped with radiator.
8. concrete pumping hydraulic control system according to claim 7, which is characterized in that the oil outlet of the flushing valve
With the pipeline connection between second overflow valve and the radiator.
9. according to claim 1-8 any one of them concrete pumping hydraulic control systems, which is characterized in that the control valve
For two-way plug-in valve.
10. concrete pumping hydraulic control system according to claim 9, which is characterized in that the hydraulic control system
Further include reversal valve, the reversal valve has the first hydraulic fluid port being connected to oil sources, is connected to the oil inlet of the two-way plug-in valve
The second hydraulic fluid port, the third hydraulic fluid port that is connected to fuel tank, when the reversal valve is in the first working condition, the of the reversal valve
One hydraulic fluid port is connected to the second hydraulic fluid port, when the reversal valve is in the second working condition, the third hydraulic fluid port of the reversal valve and
Two hydraulic fluid ports are connected to.
11. concrete pumping hydraulic control system according to claim 10, which is characterized in that when the concrete pumping
When hydraulic control system includes the second overflow valve and hydraulic control one-way valve, first guide cavity and the reversal valve of the hydraulic control one-way valve
Second hydraulic fluid port is connected to.
12. a kind of concrete pumping machinery, which is characterized in that including such as claim 1-11 any one of them concrete pumping
Hydraulic control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204341.5A CN106151135B (en) | 2015-04-27 | 2015-04-27 | Concrete pumping hydraulic control system and concrete pumping machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204341.5A CN106151135B (en) | 2015-04-27 | 2015-04-27 | Concrete pumping hydraulic control system and concrete pumping machine |
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| CN106151135B true CN106151135B (en) | 2018-09-28 |
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| WO2020132934A1 (en) * | 2018-12-26 | 2020-07-02 | 潍柴动力股份有限公司 | Hydraulic variable pump set and excavator |
| CN110131122B (en) * | 2019-03-29 | 2020-09-18 | 中联重科股份有限公司 | Control method and system for preventing cylinder slipping of pumping system and pumping device |
| CN111810474B (en) * | 2020-08-13 | 2024-07-30 | 四川新筑智能工程装备制造有限公司 | Wet-spraying trolley pumping hydraulic control system |
| CN115324960A (en) * | 2022-07-25 | 2022-11-11 | 湖南中联重科智能高空作业机械有限公司 | Oil cylinder hydraulic system and overhead working machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106254U (en) * | 1991-11-23 | 1992-06-03 | 建设部长沙建筑机械研究所 | Closing oil way reversing controller |
| JP3718821B2 (en) * | 1995-02-13 | 2005-11-24 | 石川島建機株式会社 | Concrete pump hydraulic circuit |
| KR100281932B1 (en) * | 1998-10-10 | 2001-09-22 | 양재신 | Drive cylinder hydraulics |
| CN201747703U (en) * | 2010-05-25 | 2011-02-16 | 长沙中联重工科技发展股份有限公司 | Sealed hydraulic system |
| CN103089757B (en) * | 2013-01-29 | 2015-03-18 | 三一汽车制造有限公司 | Closed hydraulic loop hot oil displacement system and concrete pumping device |
| CN103670995B (en) * | 2013-12-05 | 2017-01-11 | 中联重科股份有限公司 | Concrete pumping system, control device and control method |
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