CN105179340B - Concrete mixer and its stirring hydraulic system - Google Patents
Concrete mixer and its stirring hydraulic system Download PDFInfo
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- CN105179340B CN105179340B CN201510575066.8A CN201510575066A CN105179340B CN 105179340 B CN105179340 B CN 105179340B CN 201510575066 A CN201510575066 A CN 201510575066A CN 105179340 B CN105179340 B CN 105179340B
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Abstract
The invention discloses a kind of concrete mixer and its stirring hydraulic system, wherein, the stirring hydraulic system includes the first stirring motor (6) installed in one end of agitating shaft, wherein, the stirring hydraulic system also includes second stirring motor (9) of the other end installed in the agitating shaft, and second stirring motor (9) when the stirring moment of resistance of concrete exceedes the peak torque of first stirring motor (6) for starting.The concrete mixer includes the stirring hydraulic system.By above-mentioned technical proposal so that stirring hydraulic system of the invention can only open a stirring motor and still open two stirring motors simultaneously according to the selection of the stirring resistance of concrete, improve the adaptability of pump truck stirring system.
Description
Technical field
The present invention relates to engineering machinery hydraulic control field, in particular it relates to a kind of concrete mixer and its stirring hydraulic pressure
System.
Background technology
Concrete mixer is a kind of stretching, extension that delivery pipe on arm support is attached to by carrying, the action of revolution, by concrete
It is pumped into the special mobile mobile unit of specified altitude assignment or distance.The stirring of pump truck is to drive agitating shaft to rotate by stirring motor to come
Realize, stirring vane is provided with agitating shaft, and agitating shaft drives stirring vane to rotate simultaneously, the concrete in hopper is stirred
Mix in conveying cylinder, realize the purpose of pump concrete.
Because the dispensing of concrete has various, the concrete-agitating resistance of some dispensings is larger.In the coagulation of prior art
In native pump truck, agitating shaft is generally driven using a stirring motor, when resistance is stirred more than the moment of torsion that stirring motor can be provided,
Can not normally be stirred.
The content of the invention
It is an object of the invention to provide a kind of stirring hydraulic system of concrete mixer, the stirring hydraulic system can adapt to
The different concrete materials of stirring resistance.
To achieve these goals, the present invention provides a kind of stirring hydraulic system of concrete mixer, including installed in stirring
First stirring motor of one end of axle is mixed, wherein, the stirring hydraulic system also includes the other end installed in the agitating shaft
The second stirring motor, second stirring motor be used for concrete the stirring moment of resistance more than first stirring motor most
Start during high pulling torque.
Preferably, it is described stirring hydraulic system include controller, the first in-line, the first reversal valve, the second in-line and
Second reversal valve, by first reversal valve to the first stirring motor fuel feeding, described first changes first in-line
Have the rotating forward operating position that control first stirring motor is rotated forward anti-with what control first stirring motor was inverted to valve
Turn operating position, by second reversal valve to the second stirring motor fuel feeding, described second changes second in-line
To valve there is the ON operation position that control second stirring motor is rotated forward freely to be rotated with control second stirring motor
Free rotation work position, first reversal valve be in rotate forward operating position, second reversal valve be in freely turn
In the case of dynamic operating position, when the oil pressure of the rotating forward oil inlet of first stirring motor reaches the first oil pressure threshold value, institute
State controller and control second reversal valve from the free switching-on operating position in rotation work position.
Preferably, the stirring hydraulic system includes the pressure sensor electrically connected with the controller, the pressure sensing
Device is used to gather the oil pressure of the rotating forward oil inlet of first stirring motor.
Preferably, the stirring hydraulic system includes the first pressure relay that is electrically connected with the controller, described the
The oil inlet of one pressure switch is connected to the rotating forward oil inlet of first stirring motor, the setting of the first pressure relay
Pressure is equal to the first oil pressure threshold value.
Preferably, timing the controller is when second reversal valve switching-on operating position, by
After one scheduled time, if the oil pressure of the rotating forward oil inlet of first stirring motor is remained above or equal to the first oil pressure threshold
Value, then control second reversal valve to switch to free rotation work position from ON operation position, and control described first
Reversal valve switches to reversion operating position from operating position is rotated forward；If the oil pressure of the rotating forward oil inlet of first stirring motor
Less than the first oil pressure threshold value and higher than the second oil pressure threshold value, then first reversal valve and the second reversal valve is controlled to be maintained at
Current location；If the oil pressure of the rotating forward oil inlet of first stirring motor is less than or equal to the second oil pressure threshold value,
The second reversal valve is controlled to switch to free rotation work position from ON operation position.
Preferably, timing the controller is when first reversal valve switches to reversion operating position, by the
After two scheduled times, first reversal valve is controlled to switch to rotating forward operating position.
Preferably, the stirring hydraulic system includes the first pressure relay electrically connected with the controller and the second pressure
Power relay, the oil inlet of the first pressure relay is connected to the rotating forward oil inlet of first stirring motor, and this first
The setting pressure of pressure switch is equal to the first oil pressure threshold value；The oil inlet of the second pressure relay is connected to described
The rotating forward oil inlet of the first stirring motor or the second stirring motor, the setting pressure of the second pressure relay is equal to described second
Oil pressure threshold value.
Preferably, second reversal valve is two-position four-way solenoid valve, and the oil outlet end of second in-line is connected to institute
The oil inlet of the second reversal valve is stated, two hydraulic fluid ports of second stirring motor are connected to two of second reversal valve
Actuator port, the oil return opening of second reversal valve is connected to fuel tank, when second reversal valve is in free rotation work position
When putting, two actuator ports of second reversal valve are connected；When second reversal valve is on operating position, institute
An actuator port for stating the second reversal valve is connected with oil inlet, and another actuator port is connected with oil return opening.
Preferably, second reversal valve is two-position three way magnetic valve, and the oil outlet end of second in-line is connected to institute
The oil inlet of the second reversal valve is stated, a hydraulic fluid port of second stirring motor is connected to the working oil of second reversal valve
Mouthful, the oil return opening of another hydraulic fluid port of second stirring motor and second reversal valve is all connected to fuel tank, when described the
When two reversal valves are in free rotation work position, the actuator port of second reversal valve is connected with oil return opening；When described
When two reversal valves are on operating position, the actuator port of second reversal valve is connected with oil inlet.
Preferably, the stirring hydraulic system includes main in-line, main reversing valve and washing motor, and the main reversing valve is
Three-position four-way valve, the oil inlet end of the main in-line is connected to the oil inlet of the main reversing valve, first in-line and
Two in-lines are connected to the first actuator port of the main reversing valve, a working oil of the washing motor by connecting oil circuit
Mouth is connected to the second actuator port of the main reversing valve, and another actuator port of the washing motor is connected to fuel tank, institute
State side on main in-line and be connected to the first overflow valve, it is other on the oil circuit between the washing motor and the main reversing valve to be connected to second
Overflow valve, it is other on the connection oil circuit to be connected to the 3rd overflow valve.
The present invention also provides a kind of concrete mixer, including stirring hydraulic system as described above.
It is provided with the hydraulic system of concrete mixer of the invention for driving same the two of agitating shaft stirrings
Hydraulic motor, the first stirring motor and the second stirring motor, wherein, the first stirring motor is main motor, and the second stirring motor is
Servo-motor.In normal conditions, the first stirring motor is opened, and drives agitating shaft to rotate forward, and the second stirring motor is not turned on,
Freely rotated with agitating shaft；When the stirring moment of resistance of concrete is larger or it is big to become, more than the moment of torsion that the first stirring motor can be provided
When, the second stirring motor is opened, and larger moment of torsion is provided together with the first stirring motor, so that stirring system being capable of normal work
Make.By above-mentioned technical proposal so that stirring hydraulic system of the invention can only be opened according to the selection of the stirring resistance of concrete
Open a stirring motor or open two stirring motors simultaneously, improve the adaptability of pump truck stirring system.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body implementation method is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is that the principle of the stirring hydraulic system of the concrete mixer of the first implementation method of the invention is illustrated
Figure；
Fig. 2 is that the principle of the stirring hydraulic system of the concrete mixer of second implementation method of the invention is illustrated
Figure；
Fig. 3 is that the principle of the stirring hydraulic system of the concrete mixer of the third implementation method of the invention is illustrated
Figure；
Fig. 4 is that the principle of the stirring hydraulic system of the concrete mixer of the 4th kind of implementation method of the invention is illustrated
Figure.
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As depicted in figs. 1 and 2, according to an aspect of the present invention, there is provided a kind of stirring hydraulic system of concrete mixer,
Including the first stirring motor 6 installed in one end of agitating shaft, wherein, the hydraulic system also includes being arranged on the agitating shaft
The other end the second stirring motor 9, second stirring motor 9 is used to be stirred more than described first in the stirring moment of resistance of concrete
Start in the case of mixing the peak torque of motor 6.
It is provided with the stirring hydraulic system of concrete mixer of the invention for driving same the two of agitating shaft
Stirring hydraulic motor, the first stirring motor 6 and the second stirring motor 9, wherein, the first stirring motor 6 is main motor, the second stirring
Motor 9 is servo-motor.In normal conditions, the first stirring motor 6 is opened, and drives agitating shaft to rotate forward, the second stirring horse
It is not turned on up to 6, is freely rotated with agitating shaft；When the stirring moment of resistance of concrete is larger or it is big to become, more than the energy of the first stirring motor 6
During the moment of torsion of offer, the second stirring motor 9 is opened, and larger moment of torsion is provided together with the first stirring motor 6, so that stirring system
Being capable of normal work.
By above-mentioned technical proposal so that stirring hydraulic system of the invention can be selected according to the stirring resistance of concrete
Only open a stirring motor or open two stirring motors simultaneously, improve the adaptability of pump truck stirring system.
Stirring hydraulic system of the invention can have various appropriate structures, as long as can realize to the first stirring motor
6 and second stirring motor 9 control.Used as a kind of implementation method, as shown in Figures 1 to 4, the hydraulic system can be wrapped
Include the first in-line 4, the first reversal valve 5, the second in-line 7, the second reversal valve 8 and controller (not shown).First in-line 4
By the first reversal valve 5 to the fuel feeding of the first stirring motor 6, the first reversal valve 5 has the rotating forward that control the first stirring motor 6 is rotated forward
Operating position and the reversion operating position of the control reversion of the first stirring motor 6.Second in-line 7 is by the second reversal valve 8 to the
The fuel feeding of two stirring motor 9, the second reversal valve 8 has the ON operation position that control the second stirring motor 9 is rotated forward with control second
The free rotation work position that stirring motor 9 is freely rotated.In the first reversal valve 5 in rotating forward operating position, the second reversal valve 8
In the case of free rotation work position, when the rotating forward oil inlet (that is, A mouthfuls shown in figure) of the first stirring motor 6
When oil pressure reaches the first oil pressure threshold value, controller controls the second reversal valve 8 from the free switching-on work in rotation work position
Position, so that the second stirring motor 9 is opened.Here, term " rotating forward oil inlet " refers to the first stirring motor 6 in rotating forward
Oil inlet under state；Term " free rotation work position " is to refer to make the second stirring motor 9 freely be rotated with agitating shaft
Operating position.
When the stirring moment of resistance of concrete exceedes the peak torque of first stirring motor 6, the first stirring motor 6 stops
Rotation stop is moved, and the oil pressure of the rotating forward oil inlet of motor gradually rises, when oil pressure reaches the first oil pressure threshold value set in advance, control
Device controls the second reversal valve 8 from the free switching-on operating position in rotation work position, so that the second stirring motor 9 is opened,
Two stirring motors are rotated forward simultaneously, to provide larger moment of torsion.
Can in several ways judge whether the oil pressure of the rotating forward oil inlet of the first stirring motor 6 reaches first oil
Pressure threshold value.Used as a kind of implementation method, as depicted in figs. 1 and 2, hydraulic system of the invention includes being electrically connected with the controller
Pressure sensor 10, the pressure sensor 10 is used to gather the oil pressure of the rotating forward oil inlet of the first stirring motor 6, and controller connects
The oil pressure for receiving the collection of pressure sensor 10 simultaneously judges its relation with the first oil pressure threshold value, then to the first reversal valve 5 and/or the
Two reversal valves 8 send signal.
Used as another embodiment, as shown in Figure 3 and Figure 4, hydraulic system of the invention includes and controller electricity
The first pressure relay 15 of connection, the oil inlet of the first pressure relay 15 is connected to just rotating into for the first stirring motor 6
Hydraulic fluid port, the setting pressure of the first pressure relay 15 is equal to the first oil pressure threshold value.Pressure switch is art technology
Hydraulic Elements well known to personnel, repeat no more at this to its structure and working principle.
After the second stirring motor 9 is opened, under normal circumstances, two motors will be rotated forward together, the first stirring horse
Oil pressure up to 6 rotating forward oil inlet can decline.If pre- by first from the switching-on operating position of the second reversal valve 8
After fixing time, the oil pressure of the rotating forward oil inlet of the first stirring motor 6 is in the first oil pressure threshold value and the second oil pressure threshold value (compares first
Oil pressure threshold value is small) between, then explanation stirring resistance becomes, and to be greatly that viscosity due to material in itself is higher cause, then controller
Just by the working condition for controlling hydraulic system to be continually maintained in double motor stirring.
It is also likely to be to be caused by reasons such as material clamping stagnations to become big in view of concrete-agitating resistance, in this case, i.e.,
Make to open two motors simultaneously, the two motors are likely to rotate, the oil pressure of the rotating forward oil inlet of the first stirring motor 6
Will not decline.Therefore, in order to solve this problem, it is preferable that when the second 8 switching-on operating position of reversal valve,
By after first scheduled time, if the oil pressure of the rotating forward oil inlet of the first stirring motor 6 does not drop to the first oil pressure threshold still
Value is following, then control the second reversal valve 8 to switch to free rotation work position from ON operation position, while control first commutates
Valve 5 switches to reversion operating position from operating position is rotated forward, so that the first stirring motor 6 is inverted, the material discharge that will be blocked.
In this implementation method, it is preferable that controller when the first reversal valve 5 switches to reversion operating position timing, by the
After two scheduled times, first reversal valve 5 is controlled to switch to rotating forward operating position, that is to say, that in the material row that will be blocked
After going out, hydraulic system returns to single motor and rotates forward stirring.
It should also be understood that in whipping process, the stirring resistance of concrete may change, i.e., mixed in certain time period
The stirring resistance for coagulating soil is larger, and the stirring resistance of another time period inner concrete is smaller.In order that stirring system is in concrete
Single motor can be returned in the case of stirring resistance is less and rotates forward stirring with reducing energy consumption, it is preferable that controller is from second
Start timing during 8 switching-on operating position of reversal valve, by after first scheduled time, if the first stirring motor 6 is just
The oil pressure for rotating into hydraulic fluid port is down to below the second oil pressure threshold value, then control the second reversal valve 8 to be switched to from ON operation position
Free rotation work position, returns to single motor and rotates forward stirring.
In the implementation method of first pressure relay 15 is provided with, in order to judge the rotating forward oil-feed of the first stirring motor 6
Whether the oil pressure of mouth is less than the second oil pressure threshold value, second pressure relay 16 can also be in addition set, such as Fig. 3 and Fig. 4 institutes
Show.The oil inlet of second pressure relay 16 can be connected to the rotating forward oil inlet of the first stirring motor 6, directly to judge first
Whether the oil pressure of the rotating forward oil inlet of stirring motor 6 is less than the second oil pressure threshold value.In the first in-line 4 and the second in-line
In the case that 7 are two oil circuits parallel with one another, due to when two motors work simultaneously, the rotating forward oil inlet of two motors
Oil pressure is equal, therefore the oil inlet of second pressure relay 16 can also be connected to the rotating forward oil inlet of the second stirring motor 6,
Whether the second oil pressure threshold value is less than with the oil pressure for judging the rotating forward oil inlet of the first stirring motor 6 indirectly.
The size of the first oil pressure threshold value and the second oil pressure threshold value can specifically set as needed.For example, the first oil pressure threshold
Value can be 14MPa, and the second oil pressure threshold value can be 6MPa.
The length of first scheduled time and second scheduled time can specifically set as needed.For example, the first pre- timing
Between can be 10S, second scheduled time can be 5S.
First reversal valve 5 can be the valve of various appropriate formats, as long as can realize that the rotating of the first stirring motor 6 is cut
Change.As a kind of implementation method, the first reversal valve 5 can be the three position four-way electromagnetic valve that Median Function is M types or H types or
Two-position four-way solenoid valve, the oil outlet end of the first in-line 4 is connected to the oil inlet of the first reversal valve 5, the two of the first stirring motor 6
Individual hydraulic fluid port is connected to two actuator ports of the first reversal valve 5, and the oil return opening of the first reversal valve 5 is connected to fuel tank.
Similarly, the second reversal valve 8 can also be the valve of various appropriate formats, as long as the second stirring motor 9 can be realized
Switch between rotating forward and freely rotating.Used as a kind of implementation method, as shown in figures 1 and 3, the second reversal valve 8 can be with
It is two-position four-way solenoid valve, the oil outlet end of the second in-line 7 is connected to the oil inlet of the second reversal valve 8, the second stirring motor 9
Two hydraulic fluid ports are connected to two actuator ports of the second reversal valve 8, and the oil return opening of the second reversal valve 8 is connected to fuel tank, when
When second reversal valve 8 is in free rotation work position, two actuator ports of the second reversal valve 8 are connected；When the second commutation
When valve 8 is on operating position, an actuator port of the second reversal valve 8 is connected with oil inlet, another actuator port with
Oil return opening is connected.
Used as another embodiment, as shown in Figure 2 and Figure 4, the second reversal valve 8 can be two-position three way magnetic valve, the
The oil outlet end of two in-lines 7 is connected to the oil inlet of the second reversal valve 8, and a hydraulic fluid port of the second stirring motor 9 is connected to second
The oil return opening of the actuator port of reversal valve 8, another hydraulic fluid port of the second stirring motor 9 and the second reversal valve 8 is all connected to fuel tank,
When the second reversal valve 8 is in free rotation work position, the actuator port of the second reversal valve 8 is connected with oil return opening；When second
When reversal valve 8 is on operating position, the actuator port of the second reversal valve 8 is connected with oil inlet.
It should be noted that in hydraulic system of the invention, the first in-line 4 and the second in-line 7 can be from same
Two branch roads separated on one oil circuit, or two separate oil circuits.In other words, the first stirring motor 6 and
Two stirring motors 9 can be by same oil pump feed, it is also possible to distinguish fuel feeding by two oil pumps.In addition, present invention is generally directed to mixed
The stirring hydraulic subsystem of solidifying soil pump truck makes improvement, can will stir other auxiliary hydraulic pressures of hydraulic system and concrete mixer
Subsystem (for example, washing hydraulic system) is independent, it is also possible to by stirring hydraulic subsystem and other auxiliary hydraulic pressure subsystems
It is integrated in a hydraulic circuit, to realize various functions.
Used as a kind of implementation method, as depicted in figs. 1 and 2, hydraulic system of the invention also includes that main in-line 1, master are changed
To valve 2 and washing motor 11, main reversing valve 2 is three-position four-way valve, and the oil inlet end of main in-line 1 is connected to entering for main reversing valve 2
Hydraulic fluid port, the first in-line 4 and the second in-line 7 are connected to the first actuator port of main reversing valve 2 by connecting oil circuit 3, washing
One actuator port of motor 11 is connected to the second actuator port of main reversing valve 2, washes another actuator port of motor 11
Fuel tank is connected to, other on main in-line 1 to be connected to the first overflow valve 12, side on the oil circuit between washing motor 11 and main reversing valve 2
The second overflow valve 13 is connected to, it is other on connection oil circuit 3 to be connected to the 3rd overflow valve 14.In this way, it is possible in an independent hydraulic pressure
Stirring and water scrub function are realized in loop, and stirring and the switching of water scrub function can be realized by main reversing valve 2.
According to another aspect of the present invention, there is provided a kind of concrete mixer, the concrete mixer includes coagulation of the invention
The hydraulic system of native pump truck.
Describe the operation principle of the hydraulic system of preferred embodiment of the invention in detail below with reference to Fig. 1.
When main reversing valve 2 is in middle position, the direct oil return box of oil that oil pump comes, system is in unloading condition.
Washing motor operations：Main reversing valve 2 is in right position, and the pressure oil of oil pump is washed through B mouthfuls of entrance of main reversing valve 2
A mouthfuls of motor 11, washing motor 11 is rotated, and washes B mouthfuls of fuel-displaced oil return box of motor 11.When operating pressure is more than the second overflow valve
During 13 setting pressure, the overflow of the second overflow valve 13, to protect washing motor 11.
Single stirring motor work：Main reversing valve 2 is in left position, and the pressure oil that oil pump comes enters the through A mouthfuls of main reversing valve 2
P mouthfuls of one reversal valve 5 and P mouthfuls of the second reversal valve 8, the second reversal valve 8 is in right position, and the oil sealing that oil pump comes is closed, the second stirring
A mouthfuls and B mouthfuls of motor 9 is connected, and the second stirring motor 9 is in unloading condition, can freely be rotated with agitating shaft；
First reversal valve 6 is in right position, the oily A mouthfuls of A into the first stirring motor 6 through the first reversal valve 6 that oil pump comes
Mouthful, the first stirring motor 6 is rotated, the B mouthfuls of fuel-displaced B mouthfuls of T to the first reversal valve 5 through the first reversal valve 5 of the first stirring motor 6
Mouth oil return box.When setting pressure of the operating pressure more than the 3rd overflow valve 14, the overflow of the 3rd overflow valve 14, to protect first to stir
Mix motor 6.
Double stirring motor work：A mouthfuls of pressure of the first stirring motor 6 is changed into corresponding voltage by pressure sensor 10
Value, this voltage signal passes to controller in real time, when controller detects pressure value and reaches the first oil pressure threshold value, sends signal,
The second reversal valve 8 is set to commutate to left position, the A mouthfuls of A into the second stirring motor 9 that pressure oil passes through the second reversal valve 8 by right position
Mouthful, the second stirring motor 9 is rotated, the B mouthfuls of fuel-displaced B mouthfuls of T to the second reversal valve 8 through the second reversal valve 8 of the second stirring motor 9
Mouth oil return box.When second stirring motor 9 is rotated, A mouthfuls of the first stirring motor of real-time detection 6 of pressure sensor 10 of pressure, when
When A mouthfuls of pressure of the first stirring motor 6 is between the first oil pressure threshold value and the second oil pressure threshold value, double stirring motor work works are kept
Make state.
Stirring motor is inverted：When second stirring motor 9 is rotated, while A mouthfuls of pressure of the first stirring motor 6 is detected, when the
When A mouthfuls of pressure of one stirring motor 6 is less than the second oil pressure threshold value, controller sends signal, the second reversal valve 8 is commutated by left position
To right position, single stirring motor working condition is returned to；If reach the first oil pressure threshold value, controller sends signal, makes second
Reversal valve 8 is switched to right position, and the oil sealing that oil pump comes is closed, and A mouthfuls and B mouthfuls of the second stirring motor 9 is connected, at the second stirring motor 9
In unloading condition, can freely be rotated with agitating shaft.The first reversal valve 5 is switched to left position by right position simultaneously, and the oil that oil pump comes is through the
B mouthfuls of one reversal valve 5 enters B mouthfuls of the first stirring motor 6, and the first stirring motor 6 is rotated backward, A mouthfuls of the first stirring motor 6
The fuel-displaced A mouthfuls of T mouthfuls of oil return box to the first reversal valve 5 through the first reversal valve 5.Stirring motor reversion is provided with certain time delay, arrives
Up to after delay time, single stirring motor working condition is automatically switched to.
When the oil pressure that main reversing valve 2 is flowed into from oil pump is excessive, the first overflow valve 12 is opened, and oil passes through the first overflow valve
12 oil return boxes, prevent because of the excessive damage hydraulic system of pressure.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in range of the technology design of the invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. the stirring hydraulic system of a kind of concrete mixer, including installed in first stirring motor (6) of one end of agitating shaft, its
It is characterised by, the stirring hydraulic system also includes second stirring motor (9) of the other end installed in the agitating shaft, and this
Two stirring motors (9) for concrete the stirring moment of resistance exceed first stirring motor (6) peak torque when start,
The stirring hydraulic system includes controller, the first in-line (4), the first reversal valve (5), the second in-line (7) and the
Two reversal valves (8), first in-line (4) by first reversal valve (5) to the first stirring motor (6) fuel feeding,
First reversal valve (5) is with the rotating forward operating position and control described first for controlling first stirring motor (6) to rotate forward
The reversion operating position of stirring motor (6) reversion, second in-line (7) is by second reversal valve (8) to described the
Two stirring motors (9) fuel feeding, second reversal valve (8) is with the ON operation for controlling second stirring motor (9) to rotate forward
The free rotation work position that position and control second stirring motor (9) freely rotate；
In first reversal valve (5) in rotating forward operating position, second reversal valve (8) in free rotation work position
In the case of, when the oil pressure of the rotating forward oil inlet of first stirring motor (6) reaches the first oil pressure threshold value, the controller
Control second reversal valve (8) from the free switching-on operating position in rotation work position, the controller is from described
Start timing during two reversal valves (8) switching-on operating position, by after first scheduled time, if the first stirring horse
Oil pressure up to the rotating forward oil inlet of (6) is remained above or equal to the first oil pressure threshold value, then control second reversal valve (8) from
ON operation position switches to free rotation work position, and controls first reversal valve (5) to be cut from operating position is rotated forward
Shift to invert operating position.
2. stirring hydraulic system according to claim 1, it is characterised in that the stirring hydraulic system includes and the control
The pressure sensor (10) of device processed electrical connection, the pressure sensor (10) is for gathering the rotating forward of first stirring motor (6)
The oil pressure of oil inlet.
3. stirring hydraulic system according to claim 1, it is characterised in that the stirring hydraulic system includes and the control
The first pressure relay (15) of device electrical connection processed, the oil inlet of the first pressure relay (15) is connected to described first and stirs
The rotating forward oil inlet of motor (6) is mixed, the setting pressure of the first pressure relay (15) is equal to the first oil pressure threshold value.
4. stirring hydraulic system according to claim 1, it is characterised in that the controller is from second reversal valve
(8) timing is started during switching-on operating position, by after first scheduled time,
If the oil pressure of the rotating forward oil inlet of first stirring motor (6) is less than the first oil pressure threshold value and higher than the second oil
Pressure threshold value, then control first reversal valve (5) and the second reversal valve (8) to be maintained at current location；
If the oil pressure of the rotating forward oil inlet of first stirring motor (6) is less than or equal to the second oil pressure threshold value, control
Make the second reversal valve (8) and switch to free rotation work position from ON operation position.
5. stirring hydraulic system according to claim 1, it is characterised in that the controller is from first reversal valve
(5) timing is started when switching to reversion operating position, by after second scheduled time, controlling the first reversal valve (5) switching
To rotating forward operating position.
6. stirring hydraulic system according to claim 4, it is characterised in that the stirring hydraulic system includes and the control
The first pressure relay (15) and second pressure relay (16) of device processed electrical connection, first pressure relay (15) are entered
Hydraulic fluid port is connected to the rotating forward oil inlet of first stirring motor (6), and the setting pressure of the first pressure relay (15) is equal to
The first oil pressure threshold value；The oil inlet of the second pressure relay (16) is connected to first stirring motor (6) or
The rotating forward oil inlet of two stirring motors (9), the setting pressure of the second pressure relay (16) is equal to the second oil pressure threshold value.
7. stirring hydraulic system according to claim 1, it is characterised in that second reversal valve (8) is two-position four-way
Magnetic valve, the oil outlet end of second in-line (7) is connected to the oil inlet of second reversal valve (8), second stirring
Two hydraulic fluid ports of motor (9) are connected to two actuator ports of second reversal valve (8), second reversal valve (8)
Oil return opening be connected to fuel tank, when second reversal valve (8) is in free rotation work position, second reversal valve
(8) two actuator ports are connected；When second reversal valve (8) is on operating position, second reversal valve
(8) a actuator port is connected with oil inlet, and another actuator port is connected with oil return opening.
8. stirring hydraulic system according to claim 1, it is characterised in that second reversal valve (8) is two-position three way
Magnetic valve, the oil outlet end of second in-line (7) is connected to the oil inlet of second reversal valve (8), second stirring
One hydraulic fluid port of motor (9) is connected to the actuator port of second reversal valve (8), second stirring motor (9) it is another
The oil return opening of individual hydraulic fluid port and second reversal valve (8) is all connected to fuel tank, when second reversal valve (8) is in free rotation
During operating position, the actuator port of second reversal valve (8) is connected with oil return opening；When second reversal valve (8) is in leading
During logical operating position, the actuator port of second reversal valve (8) is connected with oil inlet.
9. stirring hydraulic system according to claim 1, it is characterised in that the stirring hydraulic system includes main in-line
(1), main reversing valve (2) and washing motor (11), the main reversing valve (2) is three-position four-way valve, and main in-line (1) is entered
Oily end is connected to the oil inlet of the main reversing valve (2), and first in-line (4) and the second in-line (7) are by connecting oil
Road (3) is connected to the first actuator port of the main reversing valve (2), and an actuator port of the washing motor (11) is connected to
Second actuator port of the main reversing valve (2), another actuator port of the washing motor (11) is connected to fuel tank, described
It is other on main in-line (1) to be connected to the first overflow valve (12), the oil circuit between washing motor (11) and the main reversing valve (2)
Upper side is connected to the second overflow valve (13), other on connection oil circuit (3) to be connected to the 3rd overflow valve (14).
10. a kind of concrete mixer, it is characterised in that including stirring hydraulic pressure as claimed in any of claims 1 to 9
System.
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| CN201510575066.8A CN105179340B (en) | 2015-09-10 | 2015-09-10 | Concrete mixer and its stirring hydraulic system |
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| CN201510575066.8A CN105179340B (en) | 2015-09-10 | 2015-09-10 | Concrete mixer and its stirring hydraulic system |
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Families Citing this family (5)
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| WO2017210450A1 (en) * | 2016-06-01 | 2017-12-07 | Nikon Corporation | Control system for controlling a fluid actuator |
| CN107387472A (en) * | 2017-07-31 | 2017-11-24 | 北汽福田汽车股份有限公司 | Trucd mixer and its hydraulic system |
| CN107620245A (en) * | 2017-08-04 | 2018-01-23 | 浙江美通筑路机械股份有限公司 | A kind of both-end driving conveying spiral and its control method |
| CN110450099B (en) * | 2019-09-16 | 2024-09-10 | 三一重机有限公司 | Shaft sleeve pressing system and sleeve pressing machine |
| CN112983920A (en) * | 2021-05-20 | 2021-06-18 | 徐州徐工施维英机械有限公司 | Cleaning and stirring integrated valve, cleaning and stirring hydraulic system and concrete pumping equipment |
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| CN201687787U (en) * | 2010-05-25 | 2010-12-29 | 中铁轨道系统集团有限公司 | Concrete pump hydraulic system for conveying high-viscosity concrete |
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