CN105217470A - Crane, hydraulic control system and winch control system - Google Patents
Crane, hydraulic control system and winch control system Download PDFInfo
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- CN105217470A CN105217470A CN201510703185.7A CN201510703185A CN105217470A CN 105217470 A CN105217470 A CN 105217470A CN 201510703185 A CN201510703185 A CN 201510703185A CN 105217470 A CN105217470 A CN 105217470A
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- 239000003921 oil Substances 0.000 claims description 110
- 239000012530 fluid Substances 0.000 claims description 42
- 239000010729 system oil Substances 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 9
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a crane, a hydraulic control system and a winch control system, wherein the winch control system comprises a main control valve group and a winch motor, a first oil port of the winch motor is connected with a first working oil port of the main control valve group, a second oil port of the winch motor is connected with a second working oil port of the main control valve group, and the winch control system also comprises: the oil inlet of the first oil supplementing pipeline is used for connecting an oil supplementing oil path of the system, the oil outlet of the first oil supplementing pipeline is connected with the oil return port of the main control valve group, and the second oil port of the winch motor is communicated with the first oil supplementing pipeline through the second oil supplementing pipeline. The winch control system solves the problem that the safety of the winch control system in the prior art is low.
Description
Technical field
The present invention relates to heavy-duty machinery field, in particular to a kind of hoisting crane, hydraulic control system and winch control system.
Background technology
At present, as depicted in figs. 1 and 2, super lift winch of the prior art needs when rope stretching to arrange back pressure valve 2 at the oil discharge outlet of motor 1, the regulation and control to lineoutofservice signal pull during to realize motor 1 rope stretching.Prior art needs simultaneously in parallel reverse at back pressure valve place check valve 3, flow conducting during to realize elevator rope closing and rope closing action.
Need in prior art to arrange electromagnetic valve 4 in winch control system, by electromagnetic valve, motor is entered during to realize motor passive rope stretching, oil discharge outlet is communicated with, form an enclosed short circle.
But, hydraulic oil in this enclosed short circle directly can absorb the heat that back pressure valve overflow produces, and this enclosed short circle is except supplementing, and a small amount of leakage oil mass is outer seldom to be produced flow with the external world and exchanges, therefore enclosed short circle self is easy to produce high temperature, especially the arm of super-tonnage crane is longer, contraction time is also longer, and the heat producing and gather is just more, the safety of influential system and service life.
In addition, this winch control system needs to use back pressure valve, check valve and electromagnetic valve, and therefore, cost is higher, increases the installing space of elevator simultaneously, reduces the global reliability of system.
Summary of the invention
Main purpose of the present invention is to provide a kind of hoisting crane, hydraulic control system and winch control system, with the problem that the safety solving winch control system of the prior art is lower.
To achieve these goals, according to an aspect of the present invention, provide a kind of winch control system, comprise main control valve group and hoist motor, first hydraulic fluid port of hoist motor is connected with the first actuator port of main control valve group, second hydraulic fluid port of hoist motor is connected with the second actuator port of main control valve group, winch control system also comprises: the first repairing pipeline, the oil inlet of the first repairing pipeline is used for connected system repairing oil circuit, the oil outlet of the first repairing pipeline is connected with the return opening of main control valve group, and the second hydraulic fluid port of hoist motor is connected with the first repairing pipeline by the second repairing pipeline.
Further, winch control system also comprises: the first Fill valve, and the first Fill valve is arranged on the first repairing pipeline, and the oil inlet of the first Fill valve is connected with system repairing oil circuit.
Further, winch control system also comprises: by pass valve, and the oil inlet of by pass valve is connected with the first actuator port of main control valve group, and the oil outlet of by pass valve is connected with the return opening of main control valve group.
Further, by pass valve is mechanical type by pass valve or electric proportional pressure control valve.
Further, winch control system also comprises: the second Fill valve, and the second Fill valve is arranged on the second repairing pipeline, and the oil outlet of the second Fill valve is connected with the second hydraulic fluid port of hoist motor.
Further, winch control system also comprises: back pressure valve, and the oil inlet of back pressure valve is connected with the return opening of main control valve group, and the oil outlet of back pressure valve is used for output hydraulic pressure oil.
Further, back pressure valve is the check valve of band response pressure.
According to a further aspect in the invention, provide a kind of hydraulic control system of hoisting crane, comprise winch control system, winch control system is above-mentioned hydraulic control system.
Further, hydraulic control system comprises main system oil return circuit and main system repairing oil circuit, and the oil inlet of the first repairing pipeline of winch control system is connected with main system repairing oil circuit, and the return opening of winch control system is connected with main system oil return circuit.
According to a third aspect of the present invention, provide a kind of hoisting crane, comprise hydraulic control system, hydraulic control system is above-mentioned hydraulic control system.
Winch control system in the present invention comprises the first repairing pipeline, because the oil inlet of this first repairing pipeline is for connecting repairing oil circuit, the oil outlet of the first repairing pipeline is by being connected with return opening, and the second hydraulic fluid port of hoist motor is connected with the first pipeline by the second repairing pipeline.
When the passive rope stretching of this winch control system, the hydraulic oil of repairing oil circuit can fill in the second hydraulic fluid port of hoist motor by the first repairing pipeline, after this hoist motor runs, hydraulic oil is discharged from the return opening of its first hydraulic fluid port through main control valve group, thus be hoist motor fuel feeding more easily, ensure the normal rotation of hoist motor.
Winch control system structure in the present invention is simple, easy to operate, has the function adapting to passive drag and drop rope, solves the problem that the safety of winch control system of the prior art is lower.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the hydraulic schematic diagram of an embodiment according to winch control system of the prior art;
Fig. 2 shows the hydraulic schematic diagram of another embodiment according to winch control system of the prior art;
Fig. 3 shows the hydraulic schematic diagram of an embodiment according to the winch control system in the present invention;
Fig. 4 shows the hydraulic schematic diagram of winch control system when passive rope stretching in Fig. 3;
Fig. 5 shows the hydraulic schematic diagram of winch control system when active release rope in Fig. 3;
Fig. 6 shows the hydraulic schematic diagram of winch control system when active rope closing in Fig. 3;
Fig. 7 shows the hydraulic schematic diagram of another embodiment according to the winch control system in the present invention;
Fig. 8 shows the structural representation according to the proportional reversing valve in Fig. 1 and Fig. 7; And
Fig. 9 shows the structural representation according to the shuttle valve in Fig. 1 and Fig. 7.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, main control valve group; 11, the first actuator port; 12, the second actuator port; 13, return opening; 14, oil-feed port; 20, hoist motor; 21, the first hydraulic fluid port; 22, the second hydraulic fluid port; 30, the first Fill valve; 40, the first repairing pipeline; 50, the second repairing pipeline; 60, by pass valve; 70, the second Fill valve; 80, back pressure valve; 110, proportional reversing valve; 111, oil inlet; 112, oil outlet; 113, the first actuator port; 114, the second actuator port; 120, pressure-compensated valve; 130, shuttle valve; 131, the first oil inlet; 132, the second oil inlet; 133, oil outlet.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Present embodiments provide a kind of winch control system, please refer to Fig. 3 to Fig. 9, this winch control system comprises main control valve group 10 and hoist motor 20, first hydraulic fluid port 21 of hoist motor 20 is connected with the first actuator port 11 of main control valve group 10, second hydraulic fluid port 22 of hoist motor 20 is connected with the second actuator port 12 of main control valve group 10, winch control system also comprises: the first repairing pipeline 40, the oil inlet of the first repairing pipeline 40 is used for connected system repairing oil circuit, the oil outlet of the first repairing pipeline 40 is connected with the return opening 13 of main control valve group 10, and the second hydraulic fluid port 22 of hoist motor 20 is connected with the first repairing pipeline 40 by the second repairing pipeline 50.
Winch control system in the present embodiment comprises the first repairing pipeline 40, because the oil inlet of this first repairing pipeline 40 is for connecting repairing oil circuit, the oil outlet of the first repairing pipeline 40 is by being connected with return opening 13, and the second hydraulic fluid port 22 of hoist motor 20 is connected with the first repairing pipeline 40 by the second repairing pipeline 50.
When the passive rope stretching of this winch control system, the hydraulic oil of repairing oil circuit can fill in the second hydraulic fluid port 22 of hoist motor 20 by the first repairing pipeline 40, after this hoist motor 20 runs, hydraulic oil is discharged from the return opening 13 of its first hydraulic fluid port 21 through main control valve group 10, thus be hoist motor 20 fuel feeding more easily, ensure the normal rotation of hoist motor 20.
Winch control system structure in the present embodiment is simple, easy to operate, has the function adapting to passive drag and drop rope, solves the problem that the safety of winch control system of the prior art is lower.
In the present embodiment, winch control system also comprises: the first Fill valve 30, first Fill valve 30 is arranged on the first repairing pipeline 40, and the oil inlet of the first Fill valve 30 is connected with system repairing oil circuit.The present embodiment can prevent fluid from flowing backwards by arranging the first Fill valve 30.
The first Fill valve 30 in native system, under the state of some main system (as main system provides separately a gear type pump repairing) also can cancel.
In the present embodiment, winch control system also comprises: by pass valve 60, and the oil inlet of by pass valve 60 is connected with the first actuator port 11 of main control valve group 10, and the oil outlet of by pass valve 60 is connected with the return opening 13 of main control valve group 10.
The present embodiment, by arranging by pass valve 60, can limit the oil liquid pressure of the first actuator port 11 place oil circuit of main control valve group 10 more easily, thus determines or limit the pulling force size of steel rope.
Preferably, by pass valve 60 is mechanical type by pass valve or electric proportional pressure control valve.In the present embodiment, according to actual conditions, by pass valve 60 may be selected to be mechanical type by pass valve, as shown in Figure 7, also can select electric proportional pressure control valve.
As shown in Figure 7, when by pass valve 60 is electric proportional pressure control valve, the oil pressure relief of by pass valve 60 can be changed by the electric current of the automatically controlled end Y3 regulating this electric proportional pressure control valve, thus (as different operating mode, different brachium) realizes the real-time control to lineoutofservice signal pull size according to the actual requirements.
For inverse proportion by pass valve, the current flow control process of the automatically controlled end Y3 of by pass valve 60 is as follows:
1. read current residing operating mode;
2. reading result is transported to PLC central process unit;
The current value of lineoutofservice signal pull value under different operating mode and corresponding electric proportional pressure control valve is pre-stored with in this PLC central process unit.
3. the automatically controlled end Y3 of given by pass valve 60 is with certain current value;
4. read the actual value of thrust of lineoutofservice signal pull sensor in real time;
5. judge whether this actual pulling force equals to store pulling force;
6. if this actual pulling force equals to store pulling force, then keep the current value of the automatically controlled end Y3 of by pass valve 60; If this actual pulling force is greater than storage pulling force, then reduce the currency of automatically controlled end Y3; If this actual pulling force is less than storage pulling force, then increase the currency of automatically controlled end Y3;
7. re-start step 4.
In the present embodiment, winch control system also comprises: the second Fill valve 70, second Fill valve 70 is arranged on the second repairing pipeline 50, and the oil outlet of the second Fill valve 70 is connected with the second hydraulic fluid port 22 of hoist motor 20.
The present embodiment, by arranging the second Fill valve 70, can prevent the fluid at the second hydraulic fluid port 22 place of hoist motor 20 from flowing back in the first repairing pipeline 40.
Preferably, the first Fill valve 30 and/or the second Fill valve 70 are the check valve without response pressure.In the present embodiment, the first Fill valve 30 and the second Fill valve 70 only need to realize nonreturn flow, therefore use the check valve without response pressure.
In the present embodiment, winch control system also comprises: back pressure valve 80, and the oil inlet of back pressure valve 80 is connected with the return opening 13 of main control valve group 10, and the oil outlet of back pressure valve 80 is used for output hydraulic pressure oil.
The present embodiment, by arranging back pressure valve 80, can make the oil return of this system there is certain back pressure, prevents oil return fast leak under the effects such as gravity, occurs vacuum or enter air.
Preferably, back pressure valve 80 is the check valve of band response pressure.The check valve of the present embodiment application band response pressure, as back pressure valve 80, can realize return oil pressure function more easily.
In the present embodiment, as shown in Figure 8, main control valve group 10 comprises proportional reversing valve 110, this proportional reversing valve 110 comprises oil inlet 111, oil outlet 112, first actuator port 113 and the second actuator port 114, and the oil inlet 111 of proportional reversing valve 110 is connected with the oil-feed port 14 of main control valve group 10, the oil outlet 112 of proportional reversing valve 110 be connected on the first repairing pipeline 40, first actuator port 113 of proportional reversing valve 110 is connected with the first actuator port 11 of main control valve group 10, second actuator port 114 of proportional reversing valve 110 is connected with the second actuator port 12 of main control valve group 10, wherein, proportional reversing valve 110 comprises primary importance, the second place and the 3rd position, in the primary importance of proportional reversing valve 110, first actuator port 113 of proportional reversing valve 110 is communicated with its oil outlet 112, second actuator port 114 of proportional reversing valve 110 is communicated with its oil inlet 111, in the second place of proportional reversing valve 110, its oil inlet 111, oil outlet 112, first actuator port 113, the all shutoff of second actuator port 114, in the 3rd position of proportional reversing valve 110, first actuator port 113 of proportional reversing valve 110 is communicated with its oil inlet 111, second actuator port 114 of proportional reversing valve 110 is communicated with its oil outlet 112.
As shown in Figures 3 to 8, main control valve group 10 also comprises pressure-compensated valve 120, and pressure-compensated valve 120 is arranged on the pipeline between the oil inlet 111 of proportional reversing valve 110 and the oil-feed port 14 of main control valve group 10.
As shown in Figures 3 to 8, main control valve group 10 also comprises shuttle valve 130, first oil inlet 131 of shuttle valve 130 is connected with the first actuator port 113 of proportional reversing valve 110, second oil inlet 132 of shuttle valve 130 is connected with the second actuator port 114 of proportional reversing valve 110, and the oil outlet 133 of shuttle valve 130 is connected with the oil control mouth of pressure-compensated valve 120.
In addition, if carry out extensive control, proportion requirement be there is no to flow system flow, pressure-compensated valve 120 and shuttle valve 130 can be cancelled, proportional reversing valve 110 can be replaced by regular tap valve yet, can realize equally controlling the pulling force of steel rope.
The present embodiment additionally provides a kind of hydraulic control system of hoisting crane, comprises winch control system, and winch control system is above-mentioned hydraulic control system.
The hydraulic control system of the hoisting crane in the present embodiment comprises above-mentioned winch control system, and like this, the heat that the hydraulic control system of this hoisting crane produces and gathers is more, has higher safety and service life.
In the present embodiment, hydraulic control system comprises main system oil return circuit and main system repairing oil circuit, the oil inlet of the first repairing pipeline 40 of winch control system is connected with main system repairing oil circuit, and the return opening 13 of winch control system is connected with main system oil return circuit.
Visible, the main system repairing oil circuit of the hydraulic control system application of the hoisting crane in the present embodiment self and main system oil return circuit, can make the fluid one-way conduction of autonomous system to enter winch control system, and utilize check valve as the first Fill valve 30, can prevent the fluid in winch control system from oppositely entering in working connection.
The present embodiment further provides a kind of hoisting crane, comprises hydraulic control system, and hydraulic control system is above-mentioned hydraulic control system.
Hoisting crane in the present embodiment comprises the hydraulic control system of above-mentioned hoisting crane, and this hoisting crane cost is lower, reduces the installing space of elevator, reduces the global reliability of system.
Below in conjunction with accompanying drawing, this winch control system is described in detail:
In the accompanying drawings, the second hydraulic fluid port 22 of A mouth to be the first hydraulic fluid port 21, B mouth of hoist motor 20 be hoist motor 20; Second actuator port 114 of A1 mouth to be the first actuator port 113, B1 of proportional reversing valve 110 be proportional reversing valve 110; Second actuator port of A2 mouth to be the first actuator port 11, B2 mouth of main control valve group 10 be main control valve group 10; Return opening 13, the T1 mouth of P mouth to be oil-feed port 14, the T mouth of main control valve group 10 be main control valve group 10 is the hydraulic fluid port that main control valve group 10 is connected with the first Fill valve 30.
As shown in Figure 3, system is made up of main control valve group 10, back pressure valve, Fill valve, the first Fill valve and hoist motor 20.Main control valve group 10 wherein comprises again proportional reversing valve, pressure-compensated valve, shuttle valve and by pass valve.The effect of the first Fill valve: make the fluid one-way conduction of autonomous system to enter and surpassed system (i.e. this winch control system), and surpassed system fluid and oppositely can not enter working connection; The effect of Fill valve: make the fluid having surpassed system supplementary enter motor B mouth (the second hydraulic fluid port 22 of hoist motor 20) smoothly; The effect of back pressure valve makes system oil return there is certain back pressure, prevents from having surpassed oil return fast leak under the effects such as gravity, occurs vacuum or enter air; The effect of by pass valve: limit the oil liquid pressure surpassed on branch road A-A1 (oil circuit of the first actuator port 113 of the first hydraulic fluid port 21 to proportional reversing valve 110 of hoist motor 20), thus determine or limit the pulling force size having surpassed steel rope.
As shown in Figure 4, when super lift winch (i.e. this winch control system) passive rope stretching (arm haulage cable travels forward), the anti-reel that drags of steel rope drives hoist motor 20 to rotate.Now hoist motor 20 is from B mouth (the second hydraulic fluid port 22) oil suction, and the B mouth that the repairing of main system enters hoist motor 20 through the second Fill valve 70 again after the T1 mouth that the first Fill valve 30 enters main control valve group 10 prevents B mouth from occurring inhaling empty to realize repairing real-time; Fluid is discharged from motor A mouth (the first hydraulic fluid port 21) after running by hoist motor 20, the proportional reversing valve 110 of main control valve group 10 is in meta dead electricity closed condition, the fluid that hoist motor 20 is discharged directly enters by pass valve 60 by the road, after by pass valve 60 overflow, fluid imports the total oil return of system through back pressure valve 80, realizes an open-circuit system global cycle.
The oil pressure relief setting value of by pass valve 60 determines the output torque of hoist motor 20 in above process, thus directly determines the pulling force size of steel rope.
As shown in Figure 5, when super lift winch active release rope, hoist motor 20 drives spool turns.Now the automatically controlled end Y1 of the proportional reversing valve 110 of main control valve group 10 obtains electric, and proportional reversing valve 110 is operated in left position (primary importance).System pressure oil flows into from main valve P mouth (oil-feed port 14), after pressure-compensated valve 120, the left position of passing ratio change-over valve 110 and oil circuit B1-B2-B (the second actuator port 114 of proportional reversing valve 110) arrive the B mouth of hoist motor 20 afterwards, and promote revolution, fluid arrives the A1 mouth (the first actuator port 113) of proportional reversing valve after motor A mouth is discharged through oil circuit A-A1, by A1 mouth and change-over valve and oil return line conducting, oil return line is arranged back pressure valve 80, through the total oil return of back pressure valve remittance after 80s main system.
As shown in Figure 6, when super lift winch active rope closing, motor drives spool turns under pressure oil effect.Now the automatically controlled end Y2 of the proportional reversing valve 110 of main control valve group 10 obtains electric, and proportional reversing valve 110 is operated in right position (the 3rd position).System pressure oil flows into from the P mouth of main control valve group 10, the right position of passing ratio change-over valve 110 and the A mouth of oil circuit A1-A2-A arrival hoist motor 20 after pressure-compensated valve 120, under the effect of pressure oil, drive hoist motor 20 to rotate, fluid arrives the B1 mouth (the second actuator port 114) of proportional reversing valve 110 after the B mouth of hoist motor 20 is discharged through oil circuit B-B2-B1, by B1 mouth and change-over valve and surpassed oil return line conducting, oil return line is provided with back pressure valve 80, through the total oil return of back pressure valve remittance after 80s main system.
Said motor drives spool turns, and therefore system needs to set up corresponding pressure, and system pressure is higher, and the moment that can be supplied to reel is larger, and the pulling force that corresponding super lift winch steel rope can reach is also larger.The pressure set points of by pass valve also defines the maximum pressure that system can reach, also the maximum pull of steel rope is just defined, if lineoutofservice signal pull exceeds setting value, then by pass valve can in setting value underflow stream, and fluid enters system oil return road equally after by pass valve.
In principle shown in Fig. 3, if change by pass valve 60 into electric proportional pressure control valve, as shown in Figure 7, then oil pressure relief is namely by regulating the size of current of automatically controlled end Y3 to change, thus (as different operating mode, different brachium) can realize the real-time control to lineoutofservice signal pull size according to the actual requirements.
The technique effect that winch control system in concrete analysis the application can realize:
1, this system can realize the two-way active retractable rope action of traditional open-circuit system, also can realize closed system passive drag and drop rope function simultaneously.
2, (stretch arm operating mode when the passive rope stretching of steel rope and surpassed mast luffing operating mode etc.), this winch control system no longer relies on enclosed short circle, just can realize the passive rope stretching of super lift winch steel rope, now winch control system and main system combine together, surpass and carried out sufficient fluid exchange with main system, belonged to open-cycle system.
3, when the passive rope stretching of steel rope, the hydraulic oil of the oil discharge outlet of hoist motor no longer directly enters the oil inlet having surpassed motor, but enter main system oil return, to enter before main system oil return through back pressure valve, have main system repairing oil circuit initiatively to be filled into the oil suction of hoist motor by check valve simultaneously.
Therefore, when super lift winch runs, the hydraulic oil of hoist motor circulation be moment and main system carry out abundant exchange can not gather the heat doing work and produce on this branch road.
4, when the passive rope stretching of steel rope, the pulling force setting of steel rope no longer relies on the back pressure valve (back pressure valve herein can be cancelled) being arranged on the oil discharge outlet place of hoist motor, but rely on the by pass valve in the working oil path of proportional reversing valve, realize the passive rope stretching of hoisting rope;
5, utilize the winch control system in the application, hoist motor initiatively rope closing time, the pressure oil exported through proportional reversing valve is equally by this by pass valve regulable control, and therefore by pass valve achieves the regulatory function to two kinds of action character, simplifies system;
6, when the passive rope stretching of steel rope, the pulling force of steel rope can realize real-time, tunable according to operating mode, arrange realization by the different oil pressure relief values of by pass valve, the large I of controlling water kick pressure realizes electrodeless or multistage variable and controls, and obtains the force value of duty requirements.
Visible, the advantage compared with prior art of the winch control system in the present embodiment:
1, this system belongs to open-circuit system, and the hydraulic oil that in elevator work, by pass valve overflow is fallen no longer directly enters the oil suction of motor, and heat fully can exchange with main system;
2, system can realize the action of traditional open-circuit system two-way active retractable rope, also can realize the function of the passive drag and drop rope of closed system simultaneously;
3, with prior art in industry surpassed compared with system, eliminate the back pressure valve of motor outlet, check valve, and a by pass valve can cover various working application, system is more succinct;
4, the mounting arrangements of hydraulic part and pipeline are more succinct, save space, improve reliability;
5, lineoutofservice signal pull can regulate in real time according to different operating mode, arrives and presets value of thrust, steel rope can be made always to be in desirable Pre strained state, utilize native system that principal arm strained condition can be made to reach optimization.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a winch control system, comprise main control valve group (10) and hoist motor (20), first hydraulic fluid port (21) of described hoist motor (20) is connected with first actuator port (11) of described main control valve group (10), second hydraulic fluid port (22) of described hoist motor (20) is connected with second actuator port (12) of described main control valve group (10), it is characterized in that, described winch control system also comprises:
First repairing pipeline (40), the oil inlet of described first repairing pipeline (40) is used for connected system repairing oil circuit, the oil outlet of described first repairing pipeline (40) is connected with the return opening (13) of described main control valve group (10), and second hydraulic fluid port (22) of described hoist motor (20) is connected with described first repairing pipeline (40) by the second repairing pipeline (50).
2. winch control system according to claim 1, is characterized in that, described winch control system also comprises:
First Fill valve (30), described first Fill valve (30) is arranged on described first repairing pipeline (40), and the oil inlet of described first Fill valve (30) is connected with described system repairing oil circuit.
3. winch control system according to claim 1, is characterized in that, described winch control system also comprises:
By pass valve (60), the oil inlet of described by pass valve (60) is connected with first actuator port (11) of described main control valve group (10), and the oil outlet of described by pass valve (60) is connected with the return opening (13) of described main control valve group (10).
4. winch control system according to claim 3, is characterized in that, described by pass valve (60) is mechanical type by pass valve or electric proportional pressure control valve.
5. winch control system according to claim 1, is characterized in that, described winch control system also comprises:
Second Fill valve (70), described second Fill valve (70) is arranged on described second repairing pipeline (50), and the oil outlet of described second Fill valve (70) is connected with second hydraulic fluid port (22) of described hoist motor (20).
6. winch control system according to claim 1, is characterized in that, described winch control system also comprises:
Back pressure valve (80), the oil inlet of described back pressure valve (80) is connected with the return opening (13) of described main control valve group (10), and the oil outlet of described back pressure valve (80) is used for output hydraulic pressure oil.
7. winch control system according to claim 6, is characterized in that, described back pressure valve (80) is the check valve of band response pressure.
8. a hydraulic control system for hoisting crane, comprises winch control system, it is characterized in that, the hydraulic control system of described winch control system according to any one of claim 1 to 7.
9. the hydraulic control system of hoisting crane according to claim 8, it is characterized in that, described hydraulic control system comprises main system oil return circuit and main system repairing oil circuit, the oil inlet of the first repairing pipeline (40) of described winch control system is connected with described main system repairing oil circuit, and the return opening (13) of described winch control system is connected with described main system oil return circuit.
10. a hoisting crane, comprises hydraulic control system, it is characterized in that, described hydraulic control system is the hydraulic control system described in claim 8 or 9.
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| CN201510703185.7A CN105217470A (en) | 2015-10-26 | 2015-10-26 | Crane, hydraulic control system and winch control system |
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| CN201510703185.7A CN105217470A (en) | 2015-10-26 | 2015-10-26 | Crane, hydraulic control system and winch control system |
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| CN203770243U (en) * | 2013-10-12 | 2014-08-13 | 徐州重型机械有限公司 | Crane and winch motor hydraulic control system thereof |
| CN204324774U (en) * | 2014-12-18 | 2015-05-13 | 中联重科股份有限公司 | Super-lifting winch hydraulic driving system and lifting structure for crane with same |
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2015
- 2015-10-26 CN CN201510703185.7A patent/CN105217470A/en active Pending
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| JPH08100805A (en) * | 1994-09-29 | 1996-04-16 | Daiden Co Ltd | Pressure control valve |
| JP2003073075A (en) * | 2001-09-04 | 2003-03-12 | Furukawa Co Ltd | Hook suspension length holding device |
| CN203770243U (en) * | 2013-10-12 | 2014-08-13 | 徐州重型机械有限公司 | Crane and winch motor hydraulic control system thereof |
| CN204324774U (en) * | 2014-12-18 | 2015-05-13 | 中联重科股份有限公司 | Super-lifting winch hydraulic driving system and lifting structure for crane with same |
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