CN105179340A - Concrete pump truck and hydraulic stirring system thereof - Google Patents
Concrete pump truck and hydraulic stirring system thereof Download PDFInfo
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- CN105179340A CN105179340A CN201510575066.8A CN201510575066A CN105179340A CN 105179340 A CN105179340 A CN 105179340A CN 201510575066 A CN201510575066 A CN 201510575066A CN 105179340 A CN105179340 A CN 105179340A
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Abstract
The invention discloses a concrete pump truck and a hydraulic stirring system thereof. The hydraulic stirring system comprises a first stirring motor (6) arranged at one end of a stirring shaft and a second stirring motor (9) arranged at the other end of the stirring shaft, wherein the second stirring motor (9) is started when the stirring resistance torque of concrete exceeds the maximum torque of the first stirring motor (6). The concrete pump truck comprises the hydraulic stirring system. According to the technical scheme, one or two of the stirring motors of the hydraulic stirring system disclosed by the invention can be decided to be started according to the stirring resistance of the concrete, so that the adaptability of the stirring system of the pump truck is improved.
Description
Technical field
The present invention relates to engineering machinery hydraulic control field, particularly, relate to a kind of concrete mixer and stir hydraulic system.
Background technique
Concrete mixer is a kind of by carrying the stretching, extension being attached to delivery pipe on jib, pivotal action, concrete pump is delivered to the special mobile mobile unit of specified altitude assignment or distance.The stirring of pump truck drives stirring shaft to rotate by stirring motor and realizes, stirring shaft is provided with mixing blade, and stirring shaft drives mixing blade to rotate simultaneously, by the concrete-agitating in hopper in conveying cylinder, realizes the object of pump concrete.
Because concrete batching has multiple, the concrete-agitating resistance of some batching is larger.In the concrete mixer of prior art, usually adopt a stirring motor to drive stirring shaft, when stirring resistance and exceeding the moment of torsion that stirring motor can provide, can not normally stir.
Summary of the invention
The object of this invention is to provide a kind of stirring hydraulic system of concrete mixer, this stirring hydraulic system can adapt to stir the different concrete materials of resistance.
To achieve these goals, the invention provides a kind of stirring hydraulic system of concrete mixer, comprise first stirring motor of the one end being arranged on stirring shaft, wherein, described stirring hydraulic system also comprises the second stirring motor of the other end being arranged on described stirring shaft, and this second stirring motor is used for starting when concrete stirring resisting moment exceedes the Maximum Torque of described first stirring motor.
Preferably, described stirring hydraulic system comprises controller, first in-line, first selector valve, second in-line and the second selector valve, described first in-line passes through described first selector valve to described first stirring motor fuel feeding, described first selector valve has the rotating forward working position controlling described first stirring motor rotating forward and the reversion working position controlling described first stirring motor reversion, described second in-line passes through described second selector valve to described second stirring motor fuel feeding, the free rotation work position that the ON operation position that described second selector valve has the described second stirring motor rotating forward of control is freely rotated with described second stirring motor of control, be at described first selector valve and rotate forward working position, when described second selector valve is in free rotation work position, when the oil pressure of the rotating forward filler opening of described first stirring motor reaches the first oil pressure threshold value, described controller controls described second selector valve and switches to ON operation position from free rotation work position.
Preferably, described stirring hydraulic system comprises the pressure transducer be electrically connected with described controller, and this pressure transducer is for gathering the oil pressure of the rotating forward filler opening of described first stirring motor.
Preferably, described stirring hydraulic system comprises the first pressure relay be electrically connected with described controller, the filler opening of described first pressure relay is connected to the rotating forward filler opening of described first stirring motor, and the setting pressure of this first pressure relay equals described first oil pressure threshold value.
Preferably, timing when described controller switches to ON operation position from described second selector valve, after first scheduled time, if the oil pressure of the rotating forward filler opening of described first stirring motor is still greater than or equal to described first oil pressure threshold value, then control described second selector valve and switch to free rotation work position from ON operation position, and control described first selector valve from rotating forward working position switch to reversion working position; If the oil pressure of the rotating forward filler opening of described first stirring motor is lower than described first oil pressure threshold value and higher than the second oil pressure threshold value, then control described first selector valve and the second selector valve remains on current location; If the oil pressure of the rotating forward filler opening of described first stirring motor is less than or equal to described second oil pressure threshold value, then controls the second selector valve and switch to free rotation work position from ON operation position.
Preferably, timing when described controller switches to reversion working position from described first selector valve, after second scheduled time, controls described first selector valve and switches to rotating forward working position.
Preferably, described stirring hydraulic system comprises the first pressure relay and the second pressure relay that are electrically connected with described controller, the filler opening of described first pressure relay is connected to the rotating forward filler opening of described first stirring motor, and the setting pressure of this first pressure relay equals described first oil pressure threshold value; The filler opening of described second pressure relay is connected to the rotating forward filler opening of described first stirring motor or the second stirring motor, and the setting pressure of this second pressure relay equals described second oil pressure threshold value.
Preferably, described second selector valve is two-position four-way solenoid valve, the oil outlet end of described second in-line is connected to the filler opening of described second selector valve, two hydraulic fluid ports of described second stirring motor are connected to two actuator ports of described second selector valve, the return opening of described second selector valve is connected to fuel tank, when described second selector valve is in free rotation work position, two actuator ports of described second selector valve are connected; When described second selector valve is in ON operation position, an actuator port of described second selector valve is communicated with filler opening, and another actuator port is communicated with return opening.
Preferably, described second selector valve is two-position three way magnetic valve, the oil outlet end of described second in-line is connected to the filler opening of described second selector valve, a hydraulic fluid port of described second stirring motor is connected to the actuator port of described second selector valve, another hydraulic fluid port of described second stirring motor and the return opening of described second selector valve are all connected to fuel tank, when described second selector valve is in free rotation work position, the actuator port of described second selector valve is communicated with return opening; When described second selector valve is in ON operation position, the actuator port of described second selector valve is communicated with filler opening.
Preferably, described stirring hydraulic system comprises main in-line, main reversing valve and washing motor, described main reversing valve is three-position four-way valve, the oil inlet end of described main in-line is connected to the filler opening of described main reversing valve, described first in-line and the second in-line are by being connected the first actuator port that oil circuit is connected to described main reversing valve, an actuator port of described washing motor is connected to the second actuator port of described main reversing valve, another actuator port of described washing motor is connected to fuel tank, on described main in-line, side is connected to the first relief valve, on oil circuit between described washing motor and described main reversing valve, side is connected to the second relief valve, on described connection oil circuit, side is connected to the 3rd relief valve.
The present invention also provides a kind of concrete mixer, comprises and stirs hydraulic system as above.
In the hydraulic system of concrete mixer of the present invention, be provided with two stirring oil hydraulic motors for driving same stirring shaft, 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 drive stirring shaft to rotate forward, the second stirring motor is not opened, and freely rotates with stirring shaft; When concrete stirring resisting moment is comparatively large or become large, during the moment of torsion that can provide more than the first stirring motor, the second stirring motor is opened, and provides larger moment of torsion, normally work to enable stirring system together with the first stirring motor.By technique scheme, make stirring hydraulic system of the present invention can select only to open a stirring motor according to concrete stirring resistance and still open two stirring motors simultaneously, improve the adaptive capacity of pump truck stirring system.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the principle schematic of the stirring hydraulic system of concrete mixer according to the first mode of execution of the present invention;
Fig. 2 is the principle schematic of the stirring hydraulic system of concrete mixer according to the second mode of execution of the present invention;
Fig. 3 is the principle schematic of the stirring hydraulic system of concrete mixer according to the third mode of execution of the present invention;
Fig. 4 is the principle schematic of the stirring hydraulic system of concrete mixer according to the 4th kind of mode of execution of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
As depicted in figs. 1 and 2, according to an aspect of the present invention, a kind of stirring hydraulic system of concrete mixer is provided, comprise first stirring motor 6 of the one end being arranged on stirring shaft, wherein, described hydraulic system also comprises the second stirring motor 9 of the other end being arranged on described stirring shaft, starts this second stirring motor 9 is for exceeding the Maximum Torque of described first stirring motor 6 in concrete stirring resisting moment.
Two stirring oil hydraulic motors for driving same stirring shaft are provided with in the stirring hydraulic system of concrete mixer of the present invention, first stirring motor 6 and the second stirring motor 9, wherein, the first stirring motor 6 is main motor, and the second stirring motor 9 is servo-motor.In normal conditions, the first stirring motor 6 is opened, and drive stirring shaft to rotate forward, the second stirring motor 6 is not opened, and freely rotates with stirring shaft; When concrete stirring resisting moment is comparatively large or become large, during the moment of torsion that can provide more than the first stirring motor 6, the second stirring motor 9 is opened, and provides larger moment of torsion, normally work to enable stirring system together with the first stirring motor 6.
By technique scheme, make stirring hydraulic system of the present invention can select only to open a stirring motor according to concrete stirring resistance and still open two stirring motors simultaneously, improve the adaptive capacity of pump truck stirring system.
Stirring hydraulic system of the present invention can have various suitable structure, as long as can realize the control to the first stirring motor 6 and the second stirring motor 9.As a kind of mode of execution, as shown in Figures 1 to 4, described hydraulic system can comprise the first in-line 4, first selector valve 5, second in-line 7, second selector valve 8 and controller (not shown).First in-line 4 is by the first selector valve 5 to the first stirring motor 6 fuel feeding, and the first selector valve 5 has the rotating forward working position that control first stirring motor 6 rotates forward and the reversion working position controlling the first stirring motor 6 reversion.Second in-line 7 passes through the second selector valve 8 to the second stirring motor 9 fuel feeding, the free rotation work position that the ON operation position that the second selector valve 8 has the rotating forward of control second stirring motor 9 is freely rotated with control the second stirring motor 9.When the first selector valve 5 be in rotate forward working position, the second selector valve 8 be in free rotation work position, when the first stirring motor 6 rotating forward filler opening (namely, A mouth shown in figure) oil pressure when reaching the first oil pressure threshold value, controller controls the second selector valve 8 and switches to ON operation position from free rotation work position, opens to make the second stirring motor 9.Here, term " rotating forward filler opening " refer to the first stirring motor 6 be in the state of rotating forward under filler opening; Term " free rotation work position " refers to the working position that the second stirring motor 9 can be made freely to rotate with stirring shaft.
When concrete stirring resisting moment exceedes the Maximum Torque of described first stirring motor 6, first stirring motor 6 stops operating, the oil pressure of the rotating forward filler opening of motor raises gradually, when oil pressure reaches the first oil pressure threshold value preset, controller controls the second selector valve 8 and switches to ON operation position from free rotation work position, to make the second stirring motor 9 open, two stirring motors rotate forward simultaneously, to provide larger moment of torsion.
Can judge whether the oil pressure of the rotating forward filler opening of the first stirring motor 6 reaches described first oil pressure threshold value in several ways.As a kind of mode of execution, as depicted in figs. 1 and 2, hydraulic system of the present invention comprises the pressure transducer 10 be electrically connected with described controller, this pressure transducer 10 is for gathering the oil pressure of the rotating forward filler opening of the first stirring motor 6, controller receives oil pressure that pressure transducer 10 gathers and judges the relation of itself and the first oil pressure threshold value, then sends signal to the first selector valve 5 and/or the second selector valve 8.
As another kind of mode of execution, as shown in Figure 3 and Figure 4, hydraulic system of the present invention comprises the first pressure relay 15 be electrically connected with described controller, the filler opening of this first pressure relay 15 is connected to the rotating forward filler opening of the first stirring motor 6, and the setting pressure of this first pressure relay 15 equals described first oil pressure threshold value.Pressure relay is hydraulic element known in those skilled in the art, repeats no more its structure and working principle at this.
After unlatching second stirring motor 9, under normal circumstances, two motors will rotate forward together, and the oil pressure of the rotating forward filler opening of the first stirring motor 6 can decline.If from the second selector valve 8 switches to ON operation position, after first scheduled time, the oil pressure of the rotating forward filler opening of the first stirring motor 6 is between the first oil pressure threshold value and the second oil pressure threshold value (less than the first oil pressure threshold value), then illustrate that stirring that resistance becomes is greatly cause because the stickiness of material itself is higher, so hydraulic control system is just continued the working state remaining on double motor stirring by controller.
Consider that concrete-agitating resistance becomes also to be caused by reasons such as material clamping stagnations greatly, in this case, even if open two motors simultaneously, these two motors also may can not rotate, and the oil pressure of the rotating forward filler opening of the first stirring motor 6 also can not decline.Therefore, in order to address this problem, preferably, when switching to ON operation position from the second selector valve 8, after first scheduled time, if the oil pressure of the rotating forward filler opening of the first stirring motor 6 is not down to below described first oil pressure threshold value yet, then control the second selector valve 8 and switch to free rotation work position from ON operation position, control the first selector valve 5 simultaneously and switch to reversion working position from rotating forward working position, to make the first stirring motor 6 reverse, the material blocked is discharged.In this embodiment, preferably, timing when controller switches to reversion working position from the first selector valve 5, after second scheduled time, control described first selector valve 5 and switch to rotating forward working position, that is, after the material that will block is discharged, hydraulic system is got back to single motor and is rotated forward stirring.
It is also understood that in whipping process, concrete stirring resistance may change, namely the stirring resistance of section inner concrete is comparatively large sometime, and the stirring resistance of another time period inner concrete is less.Single motor can be got back to when concrete-agitating resistance is less in order to make stirring system and rotate forward stirring to reduce energy consumption, preferably, timing when controller switches to ON operation position from the second selector valve 8, after first scheduled time, if the oil pressure of the rotating forward filler opening of the first stirring motor 6 is down to below described second oil pressure threshold value, then control the second selector valve 8 and switch to free rotation work position from ON operation position, get back to single motor and rotate forward stirring.
In the mode of execution being provided with the first pressure relay 15, in order to judge that whether the oil pressure of the rotating forward filler opening of the first stirring motor 6 is lower than described second oil pressure threshold value, can also arrange the second pressure relay 16, as shown in Figure 3 and Figure 4 in addition.The filler opening of the second pressure relay 16 can be connected to the rotating forward filler opening of the first stirring motor 6, directly to judge that whether the oil pressure of the rotating forward filler opening of the first stirring motor 6 is lower than described second oil pressure threshold value.When the first in-line 4 and the second in-line 7 are two oil circuits parallel with one another, due to when two motors work simultaneously, the oil pressure of the rotating forward filler opening of two motors is equal, therefore also the filler opening of the second pressure relay 16 can be connected to the rotating forward filler opening of the second stirring motor 6, indirectly to judge that whether the oil pressure of the rotating forward filler opening of the first stirring motor 6 is lower than described second oil pressure threshold value.
The size of the first oil pressure threshold value and the second oil pressure threshold value can specifically set as required.Such as, 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 required.Such as, first scheduled time can be 10S, and second scheduled time can be 5S.
First selector valve 5 can be the valve of various appropriate format, as long as the clockwise and anticlockwise that can realize the first stirring motor 6 switches.As a kind of mode of execution, first selector valve 5 can be three position four-way electromagnetic valve or the two-position four-way solenoid valve of M type or H type for Median Function, the oil outlet end of the first in-line 4 is connected to the filler opening of the first selector valve 5, two hydraulic fluid ports of the first stirring motor 6 are connected to two actuator ports of the first selector valve 5, and the return opening of the first selector valve 5 is connected to fuel tank.
Similarly, the second selector valve 8 also can be the valve of various appropriate format, switches between rotating forward and freely rotating as long as can realize the second stirring motor 9.As a kind of mode of execution, as shown in figures 1 and 3, second selector valve 8 can be two-position four-way solenoid valve, the oil outlet end of the second in-line 7 is connected to the filler opening of the second selector valve 8, two hydraulic fluid ports of the second stirring motor 9 are connected to two actuator ports of the second selector valve 8, the return opening of the second selector valve 8 is connected to fuel tank, and when the second selector valve 8 is in free rotation work position, two actuator ports of the second selector valve 8 are connected; When the second selector valve 8 is in ON operation position, an actuator port of the second selector valve 8 is communicated with filler opening, and another actuator port is communicated with return opening.
As another kind of mode of execution, as shown in Figure 2 and Figure 4, second selector valve 8 can be two-position three way magnetic valve, the oil outlet end of the second in-line 7 is connected to the filler opening of the second selector valve 8, a hydraulic fluid port of the second stirring motor 9 is connected to the actuator port of the second selector valve 8, another hydraulic fluid port of second stirring motor 9 and the return opening of the second selector valve 8 are all connected to fuel tank, and when the second selector valve 8 is in free rotation work position, the actuator port of the second selector valve 8 is communicated with return opening; When the second selector valve 8 is in ON operation position, the actuator port of the second selector valve 8 is communicated with filler opening.
It should be noted that, in hydraulic system of the present invention, the first in-line 4 and the second in-line 7 can for two branch roads separated from same oil circuit, also can be two separate oil circuits.In other words, the first stirring motor 6 and the second stirring motor 9 by same oil pump feed, also can distinguish fuel feeding by two oil pumps.In addition, the present invention makes improvement mainly for the stirring hydraulic subsystem of concrete mixer, can will stir other auxiliary hydraulic pressure subtense angles of hydraulic system and concrete mixer (such as, water lotion pressing system) independent, also can stirring hydraulic subsystem and other auxiliary hydraulic pressure subtense angles be integrated in an oil hydraulic circuit, to realize several functions.
As a kind of mode of execution, as depicted in figs. 1 and 2, hydraulic system of the present invention also comprises main in-line 1, main reversing valve 2 and washing motor 11, main reversing valve 2 is three-position four-way valve, the oil inlet end of main in-line 1 is connected to the filler opening of main reversing valve 2, first in-line 4 and the second in-line 7 are by being connected the first actuator port that oil circuit 3 is connected to main reversing valve 2, an actuator port of washing motor 11 is connected to the second actuator port of main reversing valve 2, another actuator port of washing motor 11 is connected to fuel tank, on main in-line 1, side is connected to the first relief valve 12, on oil circuit between washing motor 11 and main reversing valve 2, side is connected to the second relief valve 13, connect side on oil circuit 3 and be connected to the 3rd relief valve 14.In this way, can realize stirring and water scrub function in one independently oil hydraulic circuit, and the switching of stirring and water scrub function can be realized by main reversing valve 2.
According to a further aspect in the invention, provide a kind of concrete mixer, this concrete mixer comprises the hydraulic system of concrete mixer of the present invention.
The working principle according to the hydraulic system of the preferred embodiment of the present invention is described in detail below with reference to Fig. 1.
When main reversing valve 2 is in meta, the direct oil sump tank of oil that oil pump comes, system is in unloading condition.
Washing motor operations: main reversing valve 2 is in right position, the pressure oil that oil pump comes enters through the B mouth of main reversing valve 2 the A mouth washing motor 11, and washing motor 11 rotates, the fuel-displaced oil sump tank of B mouth of washing motor 11.When the setting pressure of working pressure more than the second relief valve 13, the second relief valve 13 overflow, to protect washing motor 11.
Single stirring motor work: main reversing valve 2 is in left position, the pressure oil that oil pump comes enters the P mouth of the first selector valve 5 and the P mouth of the second selector valve 8 through the A mouth of main reversing valve 2, second selector valve 8 is in right position, the oil sealing that oil pump comes closes, A mouth and the B mouth of the second stirring motor 9 are connected, second stirring motor 9 is in unloading condition, freely can rotate with stirring shaft;
First selector valve 6 is in right position, and the oil that oil pump comes enters the A mouth of the first stirring motor 6 through the A mouth of the first selector valve 6, and the first stirring motor 6 rotates, and the fuel-displaced B mouth through the first selector valve 5 of the B mouth of the first stirring motor 6 is to the T mouth oil sump tank of the first selector valve 5.When the setting pressure of working pressure more than the 3rd relief valve 14, the 3rd relief valve 14 overflow, to protect the first stirring motor 6.
Two stirring motor work: the A mouth pressure of the first stirring motor 6 is changed into corresponding magnitude of voltage by pressure transducer 10, this voltage signal passes to controller in real time, when controller detects that force value reaches the first oil pressure threshold value, send signal, the second selector valve 8 is made to commutate to left position by right position, pressure oil enters the A mouth of the second stirring motor 9 by the A mouth of the second selector valve 8, second stirring motor 9 rotates, and the fuel-displaced B mouth through the second selector valve 8 of the B mouth of the second stirring motor 9 is to the T mouth oil sump tank of the second selector valve 8.When second stirring motor 9 rotates, pressure transducer 10 detects the pressure of the A mouth of the first stirring motor 6 in real time, when the A mouth pressure of the first stirring motor 6 is between the first oil pressure threshold value and the second oil pressure threshold value, keeps two stirring motor efforts state.
Stirring motor reverses: when the second stirring motor 9 rotates, detect the A mouth pressure of the first stirring motor 6, when the A mouth pressure of the first stirring motor 6 is lower than the second oil pressure threshold value, controller sends signal simultaneously, make the second selector valve 8 commutate to right position by left position, return to single stirring motor working state; If when reaching the first oil pressure threshold value, controller sends signal, make the second selector valve 8 be switched to right position, the oil sealing that oil pump comes closes, and A mouth and the B mouth of the second stirring motor 9 are connected, and the second stirring motor 9 is in unloading condition, freely can rotate with stirring shaft.First selector valve 5 is switched to left position by right position simultaneously, the oil that oil pump comes enters the B mouth of the first stirring motor 6 through the B mouth of the first selector valve 5, first stirring motor 6 rotates backward, and the fuel-displaced A mouth through the first selector valve 5 of the A mouth of the first stirring motor 6 is to the T mouth oil sump tank of the first selector valve 5.Stirring motor reversion is provided with certain time delay, after arriving delay time, automatically switches to single stirring motor working state.
When the oil pressure flowing into main reversing valve 2 from oil pump is excessive, the first relief valve 12 is opened, and oil, by the first relief valve 12 oil sump tank, prevents because of the excessive damage hydraulic system of pressure.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. the stirring hydraulic system of a concrete mixer, comprise first stirring motor (6) of the one end being arranged on stirring shaft, it is characterized in that, described stirring hydraulic system also comprises second stirring motor (9) of the other end being arranged on described stirring shaft, starts this second stirring motor (9) is for exceeding the Maximum Torque of described first stirring motor (6) during in concrete stirring resisting moment.
2. stirring hydraulic system according to claim 1, it is characterized in that, described stirring hydraulic system comprises controller, first in-line (4), first selector valve (5), second in-line (7) and the second selector valve (8), described first in-line (4) by described first selector valve (5) to described first stirring motor (6) fuel feeding, described first selector valve (5) has and controls the rotating forward working position that rotates forward of described first stirring motor (6) and control the reversion working position that described first stirring motor (6) reverses, described second in-line (7) by described second selector valve (8) to described second stirring motor (9) fuel feeding, described second selector valve (8) has and controls the ON operation position that rotates forward of described second stirring motor (9) and control the free rotation work position that described second stirring motor (9) freely rotates,
When described first selector valve (5) be in rotate forward working position, described second selector valve (8) be in free rotation work position, when the oil pressure of the rotating forward filler opening of described first stirring motor (6) reaches the first oil pressure threshold value, described controller controls described second selector valve (8) and switches to ON operation position from free rotation work position.
3. stirring hydraulic system according to claim 2, it is characterized in that, described stirring hydraulic system comprises the pressure transducer (10) be electrically connected with described controller, and this pressure transducer (10) is for gathering the oil pressure of the rotating forward filler opening of described first stirring motor (6).
4. stirring hydraulic system according to claim 2, it is characterized in that, described stirring hydraulic system comprises the first pressure relay (15) be electrically connected with described controller, the filler opening of described first pressure relay (15) is connected to the rotating forward filler opening of described first stirring motor (6), and the setting pressure of this first pressure relay (15) equals described first oil pressure threshold value.
5. stirring hydraulic system according to claim 2, is characterized in that, timing when described controller switches to ON operation position from described second selector valve (8), after first scheduled time,
If the oil pressure of the rotating forward filler opening of described first stirring motor (6) is still greater than or equal to described first oil pressure threshold value, then control described second selector valve (8) and switch to free rotation work position from ON operation position, and control described first selector valve (5) from rotating forward working position switch to reversion working position;
If the oil pressure of the rotating forward filler opening of described first stirring motor (6) is lower than described first oil pressure threshold value and higher than the second oil pressure threshold value, then control described first selector valve (5) and the second selector valve (8) remains on current location;
If the oil pressure of the rotating forward filler opening of described first stirring motor (6) is less than or equal to described second oil pressure threshold value, then controls the second selector valve (8) and switch to free rotation work position from ON operation position.
6. stirring hydraulic system according to claim 5, it is characterized in that, timing when described controller switches to reversion working position from described first selector valve (5), after second scheduled time, control described first selector valve (5) and switch to rotating forward working position.
7. stirring hydraulic system according to claim 5, it is characterized in that, described stirring hydraulic system comprises the first pressure relay (15) and the second pressure relay (16) that are electrically connected with described controller, the filler opening of described first pressure relay (15) is connected to the rotating forward filler opening of described first stirring motor (6), and the setting pressure of this first pressure relay (15) equals described first oil pressure threshold value; The filler opening of described second pressure relay (16) is connected to the rotating forward filler opening of described first stirring motor (6) or the second stirring motor (9), and the setting pressure of this second pressure relay (16) equals described second oil pressure threshold value.
8. stirring hydraulic system according to claim 2, it is characterized in that, described second selector valve (8) is two-position four-way solenoid valve, the oil outlet end of described second in-line (7) is connected to the filler opening of described second selector valve (8), two hydraulic fluid ports of described second stirring motor (9) are connected to two actuator ports of described second selector valve (8), the return opening of described second selector valve (8) is connected to fuel tank, when described second selector valve (8) is in free rotation work position, two actuator ports of described second selector valve (8) are connected, when described second selector valve (8) is in ON operation position, an actuator port of described second selector valve (8) is communicated with filler opening, and another actuator port is communicated with return opening.
9. stirring hydraulic system according to claim 2, it is characterized in that, described second selector valve (8) is two-position three way magnetic valve, the oil outlet end of described second in-line (7) is connected to the filler opening of described second selector valve (8), a hydraulic fluid port of described second stirring motor (9) is connected to the actuator port of described second selector valve (8), another hydraulic fluid port of described second stirring motor (9) and the return opening of described second selector valve (8) are all connected to fuel tank, when described second selector valve (8) is in free rotation work position, the actuator port of described second selector valve (8) is communicated with return opening, when described second selector valve (8) is in ON operation position, the actuator port of described second selector valve (8) is communicated with filler opening.
10. stirring hydraulic system according to claim 2, it is characterized in that, described stirring hydraulic system comprises main in-line (1), main reversing valve (2) and washing motor (11), described main reversing valve (2) is three-position four-way valve, the oil inlet end of described main in-line (1) is connected to the filler opening of described main reversing valve (2), described first in-line (4) and the second in-line (7) are by being connected the first actuator port that oil circuit (3) is connected to described main reversing valve (2), an actuator port of described washing motor (11) is connected to the second actuator port of described main reversing valve (2), another actuator port of described washing motor (11) is connected to fuel tank, the upper side of described main in-line (1) is connected to the first relief valve (12), on oil circuit between described washing motor (11) and described main reversing valve (2), side is connected to the second relief valve (13), the upper side of described connection oil circuit (3) is connected to the 3rd relief valve (14).
11. 1 kinds of concrete mixers, is characterized in that, comprise stirring hydraulic system as claimed in any of claims 1 to 10.
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109477501A (en) * | 2016-06-01 | 2019-03-15 | 株式会社尼康 | For controlling the control system of fluid actuator |
| 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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| 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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| Publication number | Publication date |
|---|---|
| CN105179340B (en) | 2017-06-06 |
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Address after: 102206, Beijing, Shahe, Changping District Town, Sha Yang Road, Lao Wan Village North Patentee after: Beiqi Futian Automobile Co., Ltd. Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: Beiqi Futian Automobile Co., Ltd. |
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Effective date of registration: 20200929 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206, Beijing, Shahe, Changping District Town, Sha Yang Road, Lao Wan Village North Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |