CN202785434U - Winch control device in open type hydraulic system for crane - Google Patents
Winch control device in open type hydraulic system for crane Download PDFInfo
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- CN202785434U CN202785434U CN 201220402918 CN201220402918U CN202785434U CN 202785434 U CN202785434 U CN 202785434U CN 201220402918 CN201220402918 CN 201220402918 CN 201220402918 U CN201220402918 U CN 201220402918U CN 202785434 U CN202785434 U CN 202785434U
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Abstract
The utility model relates to a winch control device in an open type hydraulic system for a crane. The winch control device comprises a motor, a balance valve, a brake and a control mechanism, wherein the control mechanism comprises a first magnetic valve and a second magnetic valve, an oil inlet of the first magnetic valve is connected with a pilot oil channel of the open type hydraulic system, and an oil outlet of the first magnetic valve is connected with an oil inlet of the brake; an oil inlet of the second magnetic valve is connected with a descending oil channel of the open type hydraulic system, and an oil outlet of the second magnetic valve is connected with an oil inlet of the balance valve; and an ascending oil channel of the open type hydraulic system is connected with a first working oil port of the motor through the balance valve, and the descending oil channel of the open type hydraulic system is connected with a second working oil port of the motor. Compared with an existing winch control device, the winch control device in the open type hydraulic system for the crane is more simple in structure, smaller in fault points, and capable of using a hydro-cylinder of a domestic winch brake, so that application scope is wider.
Description
Technical field
The utility model relates to a kind of hoisting crane open type hydraulic system, particularly the winch control device of a kind of hoisting crane in the open type hydraulic system.
Background technology
Open type hydraulic system is that the oil return of motor or cylinder flows into fuel tank, and pump is from the direct oil suction of fuel tank.
Hoisting crane with the rotation of the hoist motor in the open type hydraulic system with stop to be controlled by opening with closure of drg respectively, and opening with closure of drg realizes by the break-make of brake control valve control presssure oil respectively.Therefore, brake control valve is the important guarantee of elevator safety performance.
Fig. 1 is the structure principle chart of existing winch control device.As shown in Figure 1, existing winch control device comprises drg, motorcycle brake controlling, balance cock and hoist motor (not shown next among Fig. 1).Wherein: motorcycle brake controlling comprises shuttle valve 10, reducing valve 11, the first electromagnetic valve 12, the second electromagnetic valve 13 and the 3rd electromagnetic valve 14.The first oil inlet of shuttle valve 10 links to each other with the decline oil circuit, and the second oil inlet links to each other with guide's oil circuit by the second electromagnetic valve 13.The oil outlet of shuttle valve 10 is connected the oil cylinder of the oil outlet connecting brake of the first electromagnetic valve 12 by reducing valve 11 with the oil inlet of the first electromagnetic valve 12.Link to each other with oil inlet on the balance cock by the 3rd electromagnetic valve 14 between the first oil inlet of shuttle valve 10 and the decline oil circuit.The return opening of reducing valve 11, the first electromagnetic valve 12, the second electromagnetic valve 13 and the 3rd electromagnetic valve 14 all connects fuel tank.
Among Fig. 1, the pressure of 10 pairs of guide's oil circuits of shuttle valve and decline oil circuit compares, pressure oil on the larger oil circuit of pressure arrives hoist brake, open hoist brake, make the hoist motor rotation, thereby make elevator finish hoisting and transferring weight, this detailed process is: during the winding lifting weight, the oil return of decline oil circuit, pressure ratio guide's oil circuit is low, at this moment, pressure oil on the larger guide's oil circuit of pressure passes through shuttle valve 10, reducing valve 11 and the first electromagnetic valve 12 successively, enter the oil cylinder in the drg, drg is opened, and weight is hoisted.When elevator was transferred weight, the pressure of decline oil circuit was greater than guide's oil circuit, at this moment, pressure oil on the larger decline oil circuit of pressure passes through shuttle valve 10, reducing valve 11 and the first electromagnetic valve 12 successively, enter the oil cylinder in the hoist brake, drg is opened, and weight is transferred.Balance cock does not participate in the work of hoisting under weight hoists operating mode, only enable under weight is transferred operating mode, and purpose is for weight can evenly be transferred, and the movement of falling object can not occur, and the problem that glides or impact appears in the suspension hook that namely prevents from tangling weight.
Yet, the pressure of opening of hoist brake only needs 1MPa in the above-mentioned winch control device, even if drg is all opened, its pressure also only needs 1.8MPa, and the pressure that the decline oil circuit provides has reached 10MPa, the pressure that guide's oil circuit provides is 3MPa, all much larger than the needed pressure of opening of drg, therefore, when transferring weight, that is, when the decline oil circuit provides pressure oil for drg, can use after must using 11 pairs of decline oil circuits of reducing valve pressure oil out to reduce pressure.And, also need to adopt as a comparison unit of shuttle valve.Therefore, the structure of existing winch control device is comparatively complicated.
The utility model content
The purpose of this utility model is the winch control device of a kind of hoisting crane of proposition in the open type hydraulic system, and than existing winch control device, structure of the present utility model is more simple.
For achieving the above object, the utility model provides the winch control device in a kind of hoisting crane usefulness open type hydraulic system, comprise motor, balance cock, drg and control mechanism, wherein: described control mechanism comprises the first electromagnetic valve and the second electromagnetic valve, the oil inlet of described the first electromagnetic valve links to each other with guide's oil circuit of described open type hydraulic system, and the oil outlet of described the first electromagnetic valve links to each other with the oil inlet of described drg; The oil inlet of described the second electromagnetic valve links to each other with the decline oil circuit of described open type hydraulic system, and the oil outlet of described the second electromagnetic valve links to each other with the oil inlet of described balance cock; The oil circuit that hoists of described open type hydraulic system links to each other with the first actuator port of described motor by described balance cock, and described decline oil circuit links to each other with the second actuator port of described motor; The return opening of described the first electromagnetic valve, the second electromagnetic valve and motor all links to each other with the fuel tank of described open type hydraulic system; Under the weight operating mode that hoists, the pressure oil of the described oil circuit that hoists of flowing through drives described motor by described balance cock, described the first electromagnetic valve be in during electricity condition, the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve; Transfer under the weight operating mode, the pressure oil of the described decline oil circuit of flowing through drives described motor, described the first electromagnetic valve be in during electricity condition, the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve; Described the second electromagnetic valve with respect to the time-delay of described the first electromagnetic valve be in during electricity condition, the pressure oil of the described decline oil circuit of flowing through is opened described balance cock by described the second electromagnetic valve.
Further, described control mechanism also comprises damping, and described damping is located between the oil inlet of the oil outlet of described the second electromagnetic valve and described balance cock.
Further, described control mechanism also comprises check valve, and described check valve is located between the return opening and described fuel tank of described the first electromagnetic valve and the second electromagnetic valve, and the oil outlet of described check valve is connected with described fuel tank.
Further, described winch control device also comprises the first pressure sensor, on its second actuator port that is located at described motor and the pipeline that the oil inlet of described decline oil circuit and the second electromagnetic valve is connected, described the first pressure sensor can real-time monitor the force value of described decline oil circuit; Transfer under the weight operating mode, when this force value was the standard pressure value, described the first electromagnetic valve was in to get electricity condition.
Further, described winch control device also comprises the second pressure sensor, its oil outlet that is located at described balance cock is connected on the pipeline of the second actuator port of described motor, and described the second pressure sensor can real-time monitor the force value of pipeline between described motor and the described balance cock; Under the secondary lifting weight operating mode, this force value reaches when hoisting needed force value for the first time, and described the first electromagnetic valve is in to get electricity condition, and the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve.
Further, to delay time electricly with respect to described the first electromagnetic valve the delay time scope be 30 ~ 200ms to described the second electromagnetic valve.
Further, to delay time electricly with respect to described the first electromagnetic valve time be 100ms to described the second electromagnetic valve.
Further, also comprise pressure measuring tie-in, described pressure measuring tie-in is located on the pipeline between the oil inlet of the oil outlet of described the first electromagnetic valve and described drg, the one or more positions on the pipeline between the oil inlet of described decline oil circuit and described the second electromagnetic valve, on the described pipeline that hoists between oil circuit and the described balance cock, in the oil inlet of described balance cock.
Further, described the first electromagnetic valve and the second electromagnetic valve are the two-bit triplet electromagnetic valve.
Further, described balance cock is the externally controlled type balance cock.
Based on technique scheme, the winch control device that the utility model provides has adopted two electromagnetic valves to control respectively opening of drg and balance cock, with existing winch control device except adopting two electromagnetic valves to control respectively drg and the balance cock, the structure that also needs additionally to set up reducing valve and shuttle valve is compared, integral structure of the present utility model is more simplified, and has reduced the appearance of trouble point.
In addition, hoist and transfer in the operating mode at weight, the winch control device that the utility model provides is opened the needed pressure of drg and is provided by guide's oil circuit, and the pressure rating of the pressure oil that guide's oil circuit provides is 3MPa, just in time can satisfy drg oil cylinder voltage withstand class (5MPa) requirement of present domestic production, therefore the drg of domestic production can be applied directly in the winch control device that the utility model provides, and do not need to establish in addition reducing valve the pressure of pressure oil is not reduced in the withstand voltage scope of the drg that is fit to domestic production, so the utility model is more more extensive than the field of application of existing winch control device.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structure principle chart that hoisting crane is used the winch control device in the open type hydraulic system in the prior art;
Fig. 2 is the structure principle chart that the utility model hoisting crane is used winch control device one embodiment in the open type hydraulic system;
Fig. 3 is the structure principle chart that the utility model hoisting crane is used another embodiment of winch control device in the open type hydraulic system.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 2 is the structural representation that hoisting crane is used an embodiment of open type hydraulic system winch control device.As shown in Figure 2, the hoisting crane of present embodiment comprises motor 1, balance cock 2, drg 3 and control mechanism 4 with the open type hydraulic system winch control device, wherein, control mechanism 4 comprises the first electromagnetic valve 41 and the second electromagnetic valve 42, wherein: the oil inlet A1 of the first electromagnetic valve 41 links to each other with guide's oil circuit 5 of open type hydraulic system, and the oil outlet P1 of the first electromagnetic valve 41 links to each other with the oil inlet of drg 3.The oil inlet A2 of the second electromagnetic valve 42 links to each other with the decline oil circuit 6 of open type hydraulic system, and the oil outlet P2 of the second electromagnetic valve 42 links to each other with the oil inlet X of balance cock 2.The oil circuit 7 that hoists of the oil outlet of balance cock 2 and open type hydraulic system all links to each other with the first actuator port of motor 1, and the decline oil circuit 6 of open type hydraulic system links to each other with the second actuator port of motor 1.The oil return inlet T of the first electromagnetic valve 41, the second electromagnetic valve 42 and motor 1 all links to each other with the fuel tank of open type hydraulic system.
The first electromagnetic valve 41 and the second electromagnetic valve 42 are respectively applied to control the separately break-make of the pressure oil circuit at oil outlet place,, control respectively opening and turn-offing of drg 3 and balance cock 2 that is.In the present embodiment, the first electromagnetic valve 41 and the second electromagnetic valve 42 can adopt the two-bit triplet electromagnetic valve, but are not limited to this.
In above-described embodiment, the second actuator port of motor 1 is provided with the first pressure sensor 8 with the pipeline that the oil inlet of decline oil circuit 6 and the second electromagnetic valve 42 is connected, the first pressure sensor 8 can real-time monitor the force value on the decline oil circuit 6, and the force value that monitors is flowed to extraneous controller (not shown) by circuit.Be preset with the standard pressure value in the extraneous controller, drg 3 was opened and force value that elevator can not glide when this standard pressure value was normally transferred weight.
Transferring under the weight operating mode, the flow through pressure oil CD-ROM drive motor 1 of decline oil circuit 6, build in the pressure process by the first pressure sensor 8 Real-Time Monitorings at decline oil circuit 6, when detecting force value and reach the standard pressure value, the first electromagnetic valve 41 gets electric, oil outlet is opened, and enters drg 3 by the pressure oil of the guide's oil circuit 5 of flowing through by the first electromagnetic valve 41, and drg 3 is opened.
In addition, Fig. 3 is the structure principle chart that the utility model hoisting crane is used another embodiment of winch control device in the open type hydraulic system, and in the present embodiment, what balance cock 2 adopted is the externally controlled type balance cock.As shown in Figure 3, the oil inlet X of balance cock 2 is connected with decline oil circuit 6 by the second electromagnetic valve 42, the second actuator port of the oil outlet connecting motor 1 of balance cock 2.The pipeline that is connected with motor 1 at balance cock 2 is provided with the second pressure sensor 9, the second pressure sensor 9 can real-time monitor the force value of pipeline between motor 1 and the balance cock 2, and the force value that monitors is flowed to extraneous controller (not shown) by circuit.The second pressure sensor 9 normally uses when weight is done the action that hoists for the second time, and its concrete using method will be discussed in more detail below.
In above-described embodiment, what the first pressure sensor 8 and the second pressure sensor 9 adopted is that range is the pressure sensor of 0-400bar.
Because under the weight operating mode that hoists, balance cock 2 realizes that with the form of check valve path does not participate in work.Transferring under the weight operating mode, balance cock 2 is opened and must be quoted outside oil sources and realizes its path, thereby realizes that simultaneously opening of drg 3 finish the action of transferring of elevator.When drg 3 is in half locking state, and the pressure oil in the decline oil circuit 6 has entered in the motor 1, and in the situation that balance cock 2 is also opened simultaneously, motor 1 may rotate and the phenomenon that weight glides occur, and can cause like this drg 3 to wear and tear.For fear of the generation of weight downslide phenomenon, when transferring weight, need opening time and balance cock 2 opening times of Proper Match drg 3, so the second electromagnetic valve 42 in the utility model is delayed time electricly with respect to the first electromagnetic valve 41.That is to say that when transferring weight, it is electric that the first electromagnetic valve 41 is got, to open first drg 3; After time-delay a period of time, it is electric that the second electromagnetic valve 42 is got, and to open balance cock 2, makes balance cock 2 with respect to drg 3 Time Delay Openings.
Another benefit that the second electromagnetic valve 42 is delayed time electricly with respect to the first electromagnetic valve 41 is embodied in: owing to transferring under the weight operating mode, the pressure oil of the decline oil circuit 6 of flowing through enters in the motor 1.In the stable not enough situation of the pressure that the pressure oil of decline oil circuit 6 provides, if open simultaneously drg 3 and balance cock 2, the rotation of motor 1 certainly will be unstable, occurs impact phenomenon when then causing easily elevator to transfer weight.And if wait the pressure that the pressure oil of the oil circuit 6 that descends provides reach stable after, open again balance cock 2, the rotation of motor 1 will settle out so, and impact phenomenon can not occur when elevator is transferred weight.
In the present embodiment, the time range that the second electromagnetic valve 42 is delayed time electricly with respect to the first electromagnetic valve 41 is 30 ~ 200ms, and preferably, the time of this time-delay is 100ms.
The utility model also comprises pressure measuring tie-in, one or more positions on (M2) on the pipeline between the oil inlet of (M1) on the pipeline between the oil outlet that pressure measuring tie-in can be located at the first electromagnetic valve 41 and the oil cylinder oil inlet mouth of drg 3, decline oil circuit 6 and the second electromagnetic valve 42, hoist oil circuit 7 and the pipeline that balance cock 2 is connected in the oil inlet (MVST) of (MA), balance cock 2, be respectively applied to measure the force value of above-mentioned position, conveniently to detect accurately and timely trouble point of the present utility model.
The below utilizes the utility model, and elevator is implemented to hoist to weight and moved and transfer the detailed process of action.
When hoisting weight for the first time, flow through hoist oil circuit 7 pressure oil by the first check valve 21 CD-ROM drive motor 1, the first electromagnetic valve 41 in the balance cock 2 electric, the pressure oil of the guide's oil circuit 5 of flowing through is opened drg 3 by the first electromagnetic valve 41, motor 1 rotation, elevator begin weight is implemented to hoist.
When hoisting weight for the second time, force value by pipeline between the second pressure sensor 9 monitoring motors 1 and the balance cock 2, when force value reaches when for the first time hoisting needed force value, the first electromagnetic valve 41 gets electric, oil outlet is opened, and the pressure oil of the guide's oil circuit 5 of flowing through enters drg 3 by the first electromagnetic valve 41, and drg 3 is opened, motor 1 rotation, elevator begin weight is implemented the secondary lifting action.
When transferring weight, the flow through pressure oil CD-ROM drive motor 1 of decline oil circuit 6, the pressure process of building at decline oil circuit 6 is passed through the first pressure sensor 8 Real-Time Monitorings, when detecting force value and reach the standard pressure value, the first electromagnetic valve 41 gets electric, oil outlet is opened, and the pressure oil of the guide's oil circuit 5 of flowing through enters drg 3 by the first electromagnetic valve 41, and drg 3 is opened; The second electromagnetic valve 42 is delayed time electricly with respect to the first electromagnetic valve 41, and the pressure oil in the decline oil circuit 6 of flowing through is by the X mouth of the second electromagnetic valve 42 to balance cock 2, thereby the spool that promotes balance cock 2 moves, and opens balance cock 2, and elevator begins weight is implemented to transfer.
Adopt shuttle valve that the method that the oil pressure size compares is compared with existing winch control device, the utility model is by adopting hoist oil circuit 7 and decline oil circuit 6 of the first pressure sensor 8 and 9 pairs of the second pressure sensors to build force value in the pressure process as basis for estimation, adopt the quantitatively mode of control, further promote the control accuracy of winch control device, thus the impact that can more effectively avoid the downslide of weight and reduce hydraulic pressure.And, the utility model is to adopt guide's oil circuit to provide pressure for drg, and the pressure rating of the pressure oil that guide's oil circuit provides is 3MPa, not only satisfied drg oil cylinder voltage withstand class (5MPa) requirement of present domestic production, and open drg 3 and also need not to set up in addition reducing valve, relatively existing winch control device integral structure of the present utility model is more simple, so the trouble point also just still less.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (10)
1. a hoisting crane comprises motor, balance cock, drg and control mechanism with the winch control device in the open type hydraulic system, and it is characterized in that: described control mechanism comprises the first electromagnetic valve and the second electromagnetic valve, wherein:
The oil inlet of described the first electromagnetic valve links to each other with guide's oil circuit of described open type hydraulic system, and the oil outlet of described the first electromagnetic valve links to each other with the oil inlet of described drg; The oil inlet of described the second electromagnetic valve links to each other with the decline oil circuit of described open type hydraulic system, and the oil outlet of described the second electromagnetic valve links to each other with the oil inlet of described balance cock; The oil circuit that hoists of described open type hydraulic system links to each other with the first actuator port of described motor by described balance cock, and described decline oil circuit links to each other with the second actuator port of described motor; The return opening of described the first electromagnetic valve, the second electromagnetic valve and motor all links to each other with the fuel tank of described open type hydraulic system;
Under the weight operating mode that hoists, the pressure oil of the described oil circuit that hoists of flowing through drives described motor by described balance cock, described the first electromagnetic valve be in during electricity condition, the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve;
Transfer under the weight operating mode, the pressure oil of the described decline oil circuit of flowing through drives described motor, described the first electromagnetic valve be in during electricity condition, the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve; Described the second electromagnetic valve with respect to the time-delay of described the first electromagnetic valve be in during electricity condition, the pressure oil of the described decline oil circuit of flowing through is opened described balance cock by described the second electromagnetic valve.
2. winch control device as claimed in claim 1, it is characterized in that: described control mechanism also comprises damping, described damping is located between the oil inlet of the oil outlet of described the second electromagnetic valve and described balance cock.
3. winch control device as claimed in claim 2, it is characterized in that: described control mechanism also comprises check valve, described check valve is located between the return opening and described fuel tank of described the first electromagnetic valve and the second electromagnetic valve, and the oil outlet of described check valve is connected with described fuel tank.
4. such as claim 1 or 2 or 3 described winch control devices, it is characterized in that: described winch control device also comprises the first pressure sensor, on its second actuator port that is located at described motor and the pipeline that the oil inlet of described decline oil circuit and the second electromagnetic valve is connected, described the first pressure sensor can real-time monitor the force value of described decline oil circuit;
Transfer under the weight operating mode, when this force value was the standard pressure value, described the first electromagnetic valve was in to get electricity condition.
5. winch control device as claimed in claim 4, it is characterized in that: described winch control device also comprises the second pressure sensor, its oil outlet that is located at described balance cock is connected on the pipeline of the second actuator port of described motor, and described the second pressure sensor can real-time monitor the force value of pipeline between described motor and the described balance cock;
Under the secondary lifting weight operating mode, this force value reaches when hoisting needed force value for the first time, and described the first electromagnetic valve is in to get electricity condition, and the pressure oil of the described guide's oil circuit of flowing through is opened described drg by described the first electromagnetic valve.
6. winch control device as claimed in claim 5, it is characterized in that: the delay time scope that described the second electromagnetic valve is delayed time electricly with respect to described the first electromagnetic valve is 30 ~ 200ms.
7. winch control device as claimed in claim 6, it is characterized in that: the time that described the second electromagnetic valve is delayed time electricly with respect to described the first electromagnetic valve is 100ms.
8. winch control device as claimed in claim 6, it is characterized in that: also comprise pressure measuring tie-in, described pressure measuring tie-in is located on the pipeline between the oil inlet of the oil outlet of described the first electromagnetic valve and described drg, the one or more positions on the pipeline between the oil inlet of described decline oil circuit and described the second electromagnetic valve, on the described pipeline that hoists between oil circuit and the described balance cock, in the oil inlet of described balance cock.
9. winch control device as claimed in claim 6, it is characterized in that: described the first electromagnetic valve and the second electromagnetic valve are the two-bit triplet electromagnetic valve.
10. winch control device as claimed in claim 1, it is characterized in that: described balance cock is the externally controlled type balance cock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402918 CN202785434U (en) | 2012-08-14 | 2012-08-14 | Winch control device in open type hydraulic system for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402918 CN202785434U (en) | 2012-08-14 | 2012-08-14 | Winch control device in open type hydraulic system for crane |
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| Publication Number | Publication Date |
|---|---|
| CN202785434U true CN202785434U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220402918 Withdrawn - After Issue CN202785434U (en) | 2012-08-14 | 2012-08-14 | Winch control device in open type hydraulic system for crane |
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| CN (1) | CN202785434U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466494A (en) * | 2013-09-30 | 2013-12-25 | 徐州重型机械有限公司 | Winch- controlling balance valve device, crane winch hydraulic system and crane |
| CN103508353A (en) * | 2013-09-29 | 2014-01-15 | 徐州重型机械有限公司 | Control system and method for downward-sliding prevention of secondary hoisting of winch |
| CN103588134A (en) * | 2012-08-14 | 2014-02-19 | 徐工集团工程机械股份有限公司 | Hoist control device in open hydraulic system for crane |
| CN114772493A (en) * | 2022-03-15 | 2022-07-22 | 浙江三一装备有限公司 | Control method and system of winch system and operation machine |
-
2012
- 2012-08-14 CN CN 201220402918 patent/CN202785434U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588134A (en) * | 2012-08-14 | 2014-02-19 | 徐工集团工程机械股份有限公司 | Hoist control device in open hydraulic system for crane |
| CN103588134B (en) * | 2012-08-14 | 2015-08-19 | 徐工集团工程机械股份有限公司 | Winch control device in hoisting crane open type hydraulic system |
| CN103508353A (en) * | 2013-09-29 | 2014-01-15 | 徐州重型机械有限公司 | Control system and method for downward-sliding prevention of secondary hoisting of winch |
| CN103508353B (en) * | 2013-09-29 | 2015-09-16 | 徐州重型机械有限公司 | The anti-fall control system of elevator secondary lifting and method |
| CN103466494A (en) * | 2013-09-30 | 2013-12-25 | 徐州重型机械有限公司 | Winch- controlling balance valve device, crane winch hydraulic system and crane |
| CN103466494B (en) * | 2013-09-30 | 2015-11-25 | 徐州重型机械有限公司 | A kind of rolling control balancing valve apparatus, crane hoisting hydraulic efficiency pressure system and hoisting crane |
| CN114772493A (en) * | 2022-03-15 | 2022-07-22 | 浙江三一装备有限公司 | Control method and system of winch system and operation machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20150819 |
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| RGAV | Abandon patent right to avoid regrant |