CN105967067A - System for adjusting synchronous motion of oil cylinders, synchronous motion device and crane - Google Patents
System for adjusting synchronous motion of oil cylinders, synchronous motion device and crane Download PDFInfo
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- CN105967067A CN105967067A CN201610597514.9A CN201610597514A CN105967067A CN 105967067 A CN105967067 A CN 105967067A CN 201610597514 A CN201610597514 A CN 201610597514A CN 105967067 A CN105967067 A CN 105967067A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 52
- 230000033001 locomotion Effects 0.000 title claims abstract description 46
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 223
- 238000000034 method Methods 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a system for adjusting synchronous motion of oil cylinders, a synchronous motion device and a crane. The system for adjusting synchronous motion of the oil cylinders comprises a flow dividing and collecting valve, a first reversing valve, a second reversing valve, a first oil port and a second oil port. The flow dividing and collecting valve comprises a first flow dividing port, a second flow dividing port and a flow collecting port, the flow collecting port is communicated with the first oil port, the first flow dividing port is communicated with a first interface of the first reversing valve, a second interface of the first reversing valve is used for being communicated with a rodless cavity of the first oil cylinder, a third interface of the first reversing valve is used for pressure relief, the second flow dividing port is communicated with a first interface of the second reversing valve, a second interface of the second reversing valve is used for being communicated with a rodless cavity of the second oil cylinder, and a third interface of the second reversing valve is used for pressure relief. The second oil port is used for being communicated with a rod cavity of the first oil cylinder and a rod cavity of the second oil cylinder. The system achieve synchronous motion control of two oil cylinders through two reversing valves, the number of components in the system is decreased, and oil way arrangement is simplified.
Description
Technical Field
The invention relates to the technical field of oil cylinder hydraulic control systems, in particular to a system for adjusting synchronous motion of oil cylinders, a synchronous motion device using the system and a crane.
Background
With the development of super-large cranes, the weight of the counterweight becomes larger and larger. According to the national standard, the dead weight of a vehicle running on a road cannot exceed 55 tons, and the load of a single bridge cannot exceed 12 tons.
The main technical method at present adopts a flow dividing and collecting valve to carry out synchronization control on a counterweight oil cylinder, but the synchronization effect is not ideal and certain synchronization errors exist. The synchronous cylinder, the synchronous motor or the servo synchronous valve and other elements are adopted for control, and although the synchronous performance is high, the cost is relatively high.
Chinese patent CN201110232808 discloses a double-counterweight oil cylinder hydraulic control system, which adopts a flow dividing and collecting valve to synchronously control counterweight oil cylinders, and when the actions of the counterweight oil cylinders are asynchronous, the counterweight oil cylinders to be regulated are independently controlled through electromagnetic valves to achieve synchronization, the control mode is that hydraulic oil flowing to the counterweight oil cylinders which do not need to be regulated is guided to an oil return oil way through the electromagnetic valves, namely, the hydraulic oil is regulated in a pressure relief mode, at least 4 electromagnetic valves are required to be arranged for matching regulation, the number of elements of the whole system is large, the arrangement is inconvenient, and the control process is relatively complex; in addition, in the hydraulic control system, an energy accumulator is arranged on an oil path between a flow dividing port of the flow dividing and collecting valve and the counterweight oil cylinder to absorb energy and shock, so that large impact generated at the moment of extension of the counterweight oil cylinder is avoided, the safety and the stability of the system are ensured, a hydraulic lock consisting of two balance valves is also arranged to maintain pressure of the counterweight oil cylinder, the abnormal action instability of the counterweight under the action of the dead weight of the counterweight is prevented, the stability of the system is also ensured, and the complexity of the composition of the hydraulic control system is increased to a certain degree.
Disclosure of Invention
The invention aims to provide a system for adjusting synchronous motion of oil cylinders, a synchronous motion device and a crane, and aims to solve the technical problems that a hydraulic control system for synchronous motion of a counterweight oil cylinder in the prior art is complex in structure, inconvenient to set and further complicated to control.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a system for adjusting synchronous movement of oil cylinders, which comprises a flow dividing and collecting valve, a first reversing valve, a second reversing valve, a first oil port and a second oil port, wherein the first oil port and the second oil port are used for establishing a system loop with a pressure oil path and an oil return oil path;
the flow dividing and collecting valve comprises a first flow dividing port, a second flow dividing port and a flow collecting port; wherein,
the collecting port is communicated with the first oil port;
the first shunt port is communicated with a first port of the first reversing valve, a second port of the first reversing valve is used for being communicated with a rodless cavity of the first oil cylinder, and a third port of the first reversing valve is used for relieving pressure;
the second shunt port is communicated with a first port of the second reversing valve, a second port of the second reversing valve is used for being communicated with a rodless cavity of a second oil cylinder, and a third port of the second reversing valve is used for relieving pressure;
and the second oil port is respectively communicated with the rod cavity of the first oil cylinder and the rod cavity of the second oil cylinder.
The hydraulic control system further comprises a first reversing oil path, a second reversing oil path, a first oil path and a second oil path, wherein the first oil path is used for communicating the second interface of the first reversing valve with the rodless cavity of the first oil cylinder, and the second oil path is used for communicating the second interface of the second reversing valve with the rodless cavity of the second oil cylinder.
One end of the first reversing oil way is communicated with a third interface of the first reversing valve, and the other end of the first reversing oil way is communicated with the second oil way;
one end of the second reversing oil way is communicated with a third connector of the second reversing valve, and the other end of the second reversing oil way is communicated with the first oil way.
Further, a third interface of the first reversing valve is used for being communicated with an oil return path, and a third interface of the second reversing valve is used for being communicated with the oil return path.
Furthermore, the first reversing valve and the second reversing valve are both three-way electromagnetic valves.
Further, still include:
an oil inlet of the first hydraulic control one-way valve is communicated with the second interface of the first reversing valve, and an oil outlet of the first hydraulic control one-way valve is communicated with a rodless cavity of the first oil cylinder;
an oil inlet of the second hydraulic control one-way valve is communicated with a second interface of the second reversing valve, and an oil outlet of the second hydraulic control one-way valve is communicated with a rodless cavity of the second oil cylinder.
The oil cylinder further comprises a rod cavity for communicating the first oil cylinder with the third oil port, and a rod cavity for communicating the second oil cylinder with the fourth oil port;
a control oil path of the first hydraulic control one-way valve is communicated with the third oil path;
and a control oil path of the second hydraulic control one-way valve is communicated with the fourth oil path.
The first oil port is communicated with the pressure oil way through the switch valve, and the second oil port is communicated with the oil return oil way through the switch valve.
Further, the switch valve is a four-way solenoid valve.
The invention also provides a synchronous movement device which comprises a first oil cylinder, a second oil cylinder and the system for adjusting the synchronous movement of the oil cylinders, wherein a first interface of the first reversing valve is connected with the rodless cavity of the first oil cylinder, and a first interface of the second reversing valve is connected with the rodless cavity of the second oil cylinder.
The invention also provides a crane which comprises a first counterweight, a second counterweight and the synchronous motion device, wherein the first oil cylinder is used for lifting the first counterweight, and the second oil cylinder is used for lifting the second counterweight.
The system for adjusting the synchronous motion of the oil cylinders distributes hydraulic oil of a pressure oil path through the flow dividing and collecting valve to enable the oil cylinders to move synchronously, and the hydraulic oil of the oil cylinder with relatively fast flow direction is guided to the other oil cylinder through the first reversing valve and the second reversing valve when the two oil cylinders move asynchronously so as to enable the two oil cylinders to move synchronously again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a system for adjusting synchronous movement of oil cylinders according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial structure of a system for adjusting the synchronous movement of cylinders according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a system for adjusting the synchronous movement of cylinders according to a second embodiment of the present invention;
fig. 4 is a schematic partial structural diagram of a system for adjusting synchronous movement of cylinders according to a second embodiment of the present invention.
Reference numerals:
1-a first reversing valve; 2-a second reversing valve; 3-a first oil port;
4-a second oil port; 5-a first reversing oil way; 6-a second reversing oil way;
7-a first oil path; 8-a second oil path; 9-a first pilot operated check valve;
10-a second hydraulically controlled one-way valve; 11-a third oil path; 12-a fourth oil path;
13-pressure oil circuit; 14-oil return path; 15-a first cylinder;
16-a second oil cylinder; 17-a switching valve; 18-a diversity flow valve;
101-first direction valve 102-first direction valve 103-first direction valve
The first interface of (1); the second interface of (1); a third interface;
201-second direction valve 202-second direction valve 203-second direction valve
The first interface of (1); the second interface of (1); a third interface;
181-first split port; 182-a second split port; 183-collecting port.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
in an alternative of this embodiment, as shown in fig. 1 and fig. 2, the system for adjusting synchronous movement of oil cylinders provided by this embodiment includes a flow dividing and collecting valve 18, a first direction changing valve 1, a second direction changing valve 2, and a first oil port 3 and a second oil port 4 for establishing a system loop with a pressure oil path and a return oil path. According to the telescopic requirement of the actual oil cylinder, the first oil port 3 is communicated with the pressure oil path, the second oil port 4 is communicated with the oil return path, the oil cylinder can realize the extending action, the connection relation is switched, the first oil port 3 is communicated with the oil return path, the second oil port 4 is communicated with the pressure oil path, and the oil cylinder can realize the retracting action.
Further, the flow dividing and collecting valve 18 includes a first flow dividing port 181, a second flow dividing port 182, and a flow collecting port 183; wherein, the collecting port 183 is communicated with the first oil port 3; the first shunt port 181 is communicated with a first port 101 of the first reversing valve, a second port 102 of the first reversing valve is used for being communicated with a rodless cavity of the first oil cylinder, and a third port 103 of the first reversing valve is used for relieving pressure; the second branch port 182 is communicated with a first port 201 of a second reversing valve, a second port 202 of the second reversing valve is used for being communicated with a rodless cavity of a second oil cylinder, and a third port 203 of the second reversing valve is used for pressure relief.
Further, the second oil port 4 is used for being respectively communicated with a rod cavity of the first oil cylinder and a rod cavity of the second oil cylinder. In this embodiment, the system is provided with a flow dividing and collecting valve 18, a flow collecting port 183 of the flow dividing and collecting valve is communicated with a first oil port 3, a first flow dividing port 181 of the flow dividing and collecting valve is communicated with a rodless cavity of a first oil cylinder, a second flow dividing port 182 of the flow dividing and collecting valve is communicated with a rodless cavity of a second oil cylinder, a rod cavity of the first oil cylinder and a rod cavity of the second oil cylinder are respectively communicated with a second oil port 4, and therefore a working loop for extending or retracting the oil cylinders is established; the first reversing valve 1 is arranged on an oil path between the first branch port 181 of the branch flow dividing valve 18 and a rodless cavity of the first oil cylinder, the second reversing valve 2 is arranged on an oil path between the second branch port 182 of the branch flow dividing valve 18 and a rodless cavity of the second oil cylinder, when the actions of the oil cylinders are asynchronous, the oil cylinders with relatively fast actions are decompressed, namely, hydraulic oil flowing to the oil cylinders with relatively fast actions from the branch flow dividing valve 18 is reversed, and the hydraulic oil is stopped to be reversed after the actions of the oil cylinders are adjusted to be synchronous.
In the alternative of the embodiment, further, the hydraulic control system further comprises a first reversing oil path 5, a second reversing oil path 6, a first oil path 7 for communicating the second interface 102 of the first reversing valve with the rodless cavity of the first oil cylinder, and a second oil path 8 for communicating the second interface 202 of the second reversing valve with the rodless cavity of the second oil cylinder; one end of the first reversing oil path 5 is communicated with a third interface 103 of the first reversing valve, and the other end of the first reversing oil path 5 is communicated with the second oil path 8; one end of the second reversing oil path 6 is communicated with the third port 203 of the second reversing valve, and the other end of the second reversing oil path 6 is communicated with the first oil path 7. In this embodiment, when the first direction valve 1 and the second direction valve 2 are powered off, the first shunt port 181 of the flow dividing and collecting valve 18 is communicated with the rodless cavity of the first cylinder, and the second shunt port 182 of the flow dividing and collecting valve 18 is communicated with the rodless cavity of the second cylinder, so that the requirement for controlling the synchronous movement of the cylinders can be met. When the first reversing valve 1 is powered on, the first oil cylinder stops moving, the flow of the first branch port 181 of the branch flow dividing valve 18 is reversed through the first reversing valve 1, the third port 103 of the first reversing valve and the first reversing oil path 5 are communicated to the second oil path 8, and the flow is converged with the flow of the second branch port 182 of the branch flow dividing valve 18 to enter a rodless cavity of the second oil cylinder, so that the extending speed of the second oil cylinder is accelerated; when the second reversing valve 2 is powered on, the extending speed of the first oil cylinder can be increased, the process refers to the situation that the first reversing valve 1 is powered on, and the process is not repeated, so that the requirement for controlling the independent movement of the oil cylinder can be met. The synchronous control and the independent control process when the oil cylinder retracts can refer to the control process when the oil cylinder extends, and the description is omitted.
In an alternative of the present embodiment, further, the first direction valve 1 and the second direction valve 2 are both three-way solenoid valves. The three-way electromagnetic valve can realize the reversing function of the first reversing valve 1 and the second reversing valve 2.
In an alternative scheme of the embodiment, further, the hydraulic control system further comprises a first hydraulic control one-way valve 9, an oil inlet of the first hydraulic control one-way valve 9 is communicated with the second interface 102 of the first reversing valve, and an oil outlet of the first hydraulic control one-way valve 9 is used for being communicated with a rodless cavity of the first oil cylinder; an oil inlet of the second hydraulic control one-way valve 10 is communicated with a second interface 202 of the second reversing valve, and an oil outlet of the second hydraulic control one-way valve 10 is communicated with a rodless cavity of the second oil cylinder. In this embodiment, the first hydraulic control check valve 9 is disposed on an oil path between the first reversing valve 1 and the first oil cylinder, and the second hydraulic control check valve 10 is disposed on an oil path between the second reversing valve 2 and the second oil cylinder, so as to maintain pressure of the two oil cylinders, prevent abnormal instability of the counterweight under the action of its own weight, and ensure the stability of the system operation.
In the alternative of this embodiment, further, a third oil path 11 for communicating the rod chamber of the first oil cylinder with the second oil port 4, and a fourth oil path 12 for communicating the rod chamber of the second oil cylinder with the second oil port 4 are further included; the control oil way of the first hydraulic control one-way valve 9 is communicated with the third oil way 11; the control oil passage of the second hydraulic check valve 10 communicates with the fourth oil passage 12.
In an alternative of this embodiment, the hydraulic control system further includes a pressure oil path 13, an oil return path 14, and a switch valve 17, the first oil port 3 is communicated with the pressure oil path 13 through the switch valve 17, the second oil port 4 is communicated with the oil return path 14 through the switch valve 17, and the switch valve 17 is a four-way solenoid valve. In the embodiment, the on-off of the system oil path is controlled by the switch valve 17, and the communication relationship between the first oil port 3 and the second oil port 4 and the pressure oil path 13 and the oil return path 14 is switched, so that the synchronous extension or retraction of the first oil cylinder and the second oil cylinder is controlled.
Example two:
in an alternative of this embodiment, as shown in fig. 3 and 4, the system for adjusting synchronous movement of oil cylinders provided by this embodiment includes a flow dividing and collecting valve 18, a first direction valve 1, a second direction valve 2, and a first oil port 3 and a second oil port 4 for establishing a system loop with a pressure oil path and a return oil path. The first oil port 3 is communicated with the pressure oil path, the second oil port 4 is communicated with the oil return path, the oil cylinder can realize the extending action, the first oil port 3 is communicated with the oil return path, the second oil port 4 is communicated with the pressure oil path, and the oil cylinder can realize the retracting action.
Further, the flow dividing and collecting valve 18 includes a first flow dividing port 181, a second flow dividing port 182, and a flow collecting port 183; wherein, the collecting port 183 is communicated with the first oil port 3; the first shunt port 181 is communicated with a first port 101 of the first reversing valve, a second port 102 of the first reversing valve is used for being communicated with a rodless cavity of the first oil cylinder, and a third port 103 of the first reversing valve is used for relieving pressure; the second branch port 182 is communicated with a first port 201 of a second reversing valve, a second port 202 of the second reversing valve is used for being communicated with a rodless cavity of a second oil cylinder, and a third port 203 of the second reversing valve is used for pressure relief.
Further, the second oil port 4 is used for being respectively communicated with a rod cavity of the first oil cylinder and a rod cavity of the second oil cylinder. In this embodiment, the collecting port 183 of the flow dividing and collecting valve 18 is communicated with the first port 3, the first flow dividing port 181 is communicated with the rodless cavity of the first cylinder, the second flow dividing port 182 is communicated with the rodless cavity of the second cylinder, and the rod cavity of the first cylinder and the rod cavity of the second cylinder are respectively communicated with the second port 4, so as to establish a working loop for extending or retracting the cylinders; when the motions of the cylinders are asynchronous, the first reversing valve 1 or the second reversing valve 2 reverses the hydraulic oil flowing from the flow dividing and collecting valve 18 to the cylinder which moves relatively fast, so that the motions of the cylinders are adjusted to be synchronous.
In an alternative of this embodiment, further, the third port 103 of the first direction valve is used for communicating with the oil return path, and the third port 203 of the second direction valve is used for communicating with the oil return path. In this embodiment, when the first reversing valve 1 and the second reversing valve 2 are de-energized, the requirement for controlling synchronous movement of the oil cylinders can be met. When the first reversing valve 1 is powered on, the first oil cylinder stops moving, the flow of the first flow dividing port 181 of the flow dividing and collecting valve 18 is decompressed through the first reversing valve 1 and flows back to the oil return path, and the second oil cylinder continues to extend out; when the second reversing valve 2 is powered on, the second oil cylinder stops moving, the first oil cylinder continues to extend out, and the requirement for controlling the independent movement of the oil cylinders can be met. The synchronous control and the independent control process when the oil cylinder retracts can refer to the control process when the oil cylinder extends, and the description is omitted.
In the alternative of the embodiment, further, other settings are the same as the first embodiment.
Example three:
in an alternative aspect of this embodiment, a synchronous motion device is provided, comprising a first cylinder 15, a second cylinder 16, and a system for adjusting synchronous motion of the cylinders as described in the first embodiment or the second embodiment, wherein the first port 101 of the first direction valve is connected to the rodless chamber of the first cylinder 15, and the first port 201 of the second direction valve is connected to the rodless chamber of the second cylinder 16. In the embodiment, the system for adjusting the synchronous movement of the cylinders can control the first cylinder 15 and the second cylinder 16 to move synchronously, so as to provide reliable guarantee for the instruments or work occasions needing to use the synchronous movement cylinders.
Example four:
in an alternative of this embodiment, a crane is provided, which includes a first counterweight, a second counterweight, and a synchronous moving device as described in the third embodiment, wherein the first oil cylinder 15 is used for lifting the first counterweight, and the second oil cylinder 16 is used for lifting the second counterweight. In the embodiment, by controlling the first oil cylinder 15 and the second oil cylinder 16, the two balance weights of the crane can move independently on the basis of synchronous movement, so that various requirements in actual use are met; the switch valve 17 is connected with a pressure oil path and an oil return oil path of the whole hydraulic control system; other functional components of the crane are the same as those in the prior art, and are not described again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The system for adjusting the synchronous movement of the oil cylinders is characterized by comprising a flow dividing and collecting valve (18), a first reversing valve (1), a second reversing valve (2), a first oil port (3) and a second oil port (4) which are used for establishing a system loop with a pressure oil path and an oil return path;
the flow dividing and collecting valve (18) comprises a first flow dividing port (181), a second flow dividing port (182) and a flow collecting port (183); wherein,
the collecting port (183) is communicated with the first oil port (3);
the first shunt port (181) is communicated with a first port (101) of the first reversing valve, a second port (102) of the first reversing valve is used for being communicated with a rodless cavity of the first oil cylinder, and a third port (103) of the first reversing valve is used for pressure relief;
the second branch port (182) is communicated with a first port (201) of the second reversing valve, a second port (202) of the second reversing valve is used for being communicated with a rodless cavity of a second oil cylinder, and a third port (203) of the second reversing valve is used for pressure relief;
and the second oil port (4) is respectively communicated with the rod cavity of the first oil cylinder and the rod cavity of the second oil cylinder.
2. The system for adjusting the synchronous motion of the cylinders according to claim 1, further comprising a first direction-changing oil passage (5), a second direction-changing oil passage (6), a first oil passage (7) for communicating the second port (102) of the first direction-changing valve with the rodless chamber of the first cylinder, and a second oil passage (8) for communicating the second port (202) of the second direction-changing valve with the rodless chamber of the second cylinder;
one end of the first reversing oil path (5) is communicated with a third connector (103) of the first reversing valve, and the other end of the first reversing oil path (5) is communicated with the second oil path (8);
one end of the second reversing oil path (6) is communicated with a third interface (203) of the second reversing valve, and the other end of the second reversing oil path (6) is communicated with the first oil path (7).
3. The system for adjusting the synchronous movement of the cylinders according to claim 1 or 2, characterized in that the third port (103) of the first direction valve is used for communicating with an oil return path, and the third port (203) of the second direction valve is used for communicating with an oil return path.
4. The system for regulating the synchronous motion of oil cylinders according to claim 1, characterized in that the first change valve (1) and the second change valve (2) are three-way solenoid valves.
5. The system for adjusting the synchronized motion of cylinders of claim 1, further comprising:
an oil inlet of the first hydraulic control one-way valve (9) is communicated with a second interface (102) of the first reversing valve, and an oil outlet of the first hydraulic control one-way valve (9) is communicated with a rodless cavity of a first oil cylinder;
an oil inlet of the second hydraulic control one-way valve (10) is communicated with a second connector (202) of the second reversing valve, and an oil outlet of the second hydraulic control one-way valve (10) is communicated with a rodless cavity of the second oil cylinder.
6. The system for adjusting the synchronous motion of the cylinders according to claim 5, further comprising a third oil path (11) for communicating the rod chamber of the first cylinder with the second oil port (4), and a fourth oil path (12) for communicating the rod chamber of the second cylinder with the second oil port (4);
the control oil way of the first hydraulic control one-way valve (9) is communicated with the third oil way (11);
and a control oil way of the second hydraulic control one-way valve (10) is communicated with the fourth oil way (12).
7. The system for adjusting the synchronous motion of the oil cylinders according to claim 1, further comprising a pressure oil path (13), an oil return path (14) and a switch valve (17), wherein the first oil port (3) is communicated with the pressure oil path (13) through the switch valve (17), and the second oil port (4) is communicated with the oil return path (14) through the switch valve (17).
8. System for regulating the synchronous motion of the cylinders according to claim 7, characterized in that the on-off valve (17) is a four-way solenoid valve.
9. A device for synchronized movement of cylinders, comprising a first cylinder (15), a second cylinder (16) and a system for adjusting the synchronized movement of cylinders according to any of claims 1-8, wherein the first port (101) of the first direction valve is connected to the rodless chamber of the first cylinder (15) and the first port (201) of the second direction valve is connected to the rodless chamber of the second cylinder (16).
10. A crane comprising a first counterweight, a second counterweight and a synchronous movement device as claimed in claim 9, the first cylinder (15) being used to lift the first counterweight and the second cylinder (16) being used to lift the second counterweight.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610597514.9A CN105967067A (en) | 2016-07-26 | 2016-07-26 | System for adjusting synchronous motion of oil cylinders, synchronous motion device and crane |
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| CN201610597514.9A CN105967067A (en) | 2016-07-26 | 2016-07-26 | System for adjusting synchronous motion of oil cylinders, synchronous motion device and crane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167248A (en) * | 2016-12-07 | 2018-06-15 | 邵阳学院 | The velocity stages system and crane that a kind of crane counterweight oil cylinder is synchronized with the movement |
| CN108996414A (en) * | 2018-10-12 | 2018-12-14 | 崔洁 | A kind of tyre crane hoisting system and control method |
| CN113719248A (en) * | 2021-06-24 | 2021-11-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
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| CN108167248A (en) * | 2016-12-07 | 2018-06-15 | 邵阳学院 | The velocity stages system and crane that a kind of crane counterweight oil cylinder is synchronized with the movement |
| CN108996414A (en) * | 2018-10-12 | 2018-12-14 | 崔洁 | A kind of tyre crane hoisting system and control method |
| CN113719248A (en) * | 2021-06-24 | 2021-11-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
| CN113719248B (en) * | 2021-06-24 | 2024-04-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
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Application publication date: 20160928 |