CN109505813B - Hydraulic synchronous control device - Google Patents
Hydraulic synchronous control device Download PDFInfo
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- CN109505813B CN109505813B CN201811597106.9A CN201811597106A CN109505813B CN 109505813 B CN109505813 B CN 109505813B CN 201811597106 A CN201811597106 A CN 201811597106A CN 109505813 B CN109505813 B CN 109505813B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 116
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002498 deadly effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic synchronous control device, which relates to the technical field of hydraulic control and comprises: the hydraulic control system comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a two-position four-way electromagnetic valve, a synchronous cylinder, a first valve, a second valve and an electromagnetic overflow valve, wherein the first port, the second port and the third port are used for being connected with a hydraulic source, and the fourth port, the fifth port and the sixth port are used for being connected with a first driving hydraulic cylinder and a second driving hydraulic cylinder; the synchronous cylinder comprises a first cylinder body, a second cylinder body, a rod body which is arranged between the first cylinder body and the second cylinder body in a penetrating way and capable of moving, a first piston and a second piston which are connected to the rod body, the first piston divides the first cylinder body into a first chamber and a second chamber, and the second piston divides the second cylinder body into a third chamber and a fourth chamber. The multi-cylinder synchronous motion control device can adopt conventional hydraulic elements and achieve multi-cylinder synchronous motion by using simple electrical control.
Description
Technical Field
The invention relates to the technical field of hydraulic control, in particular to a hydraulic synchronous control device.
Background
The existing hydraulic synchronization technology generally adopts a synchronous motor or closed-loop control. The synchronous motor is rigidly synchronous with the rotating speed of each flow motor, and due to objective mechanical errors and load non-uniformity, the synchronous motor can generate accumulated errors along with the lengthening of the service time, so that the errors cannot be automatically eliminated by the synchronous motor. In addition, as the wear of the motor increases, the synchronization performance of the motor decreases, but manual intervention cannot be performed, so that the production of the device or system controlled by the motor cannot be continuously performed during the production and use processes.
Although the closed-loop control can realize higher synchronous precision, the closed-loop control has higher requirements on the response of the valve, the precision of the valve and the precision of oil, thereby causing higher manufacturing cost. Meanwhile, the closed-loop control inevitably uses a position sensor, and the protection of the position sensor and the high requirement on the use environment are also high, and the high-temperature and humid working conditions are greatly restricted. In addition, the most central component in closed loop control is the electrical PLC, but the most deadly component is also the electrical PLC, so that once it is powered down or the electrical PLC fails, the entire device will not work.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the invention is to provide a hydraulic synchronous control device which can realize multi-cylinder synchronous action by adopting a conventional hydraulic element and using simple electric control, thereby avoiding the high requirements on oil liquid, valves and electric control.
The specific technical scheme of the embodiment of the invention is as follows:
a hydraulic synchronization control apparatus, comprising:
the hydraulic control system comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a two-position four-way electromagnetic valve, a synchronous cylinder, a first valve, a second valve and an electromagnetic overflow valve, wherein the first port, the second port and the third port are used for being connected with a hydraulic source, and the fourth port, the fifth port and the sixth port are used for being connected with a first driving hydraulic cylinder and a second driving hydraulic cylinder;
the synchronous cylinder comprises a first cylinder body, a second cylinder body, a rod body capable of moving and penetrating between the first cylinder body and the second cylinder body, and a first piston and a second piston which are connected to the rod body, wherein the first piston divides the first cylinder body into a first chamber and a second chamber, and the second piston divides the second cylinder body into a third chamber and a fourth chamber; the second chamber is communicated with the first valve, the fourth chamber is communicated with the second valve, the second chamber can be communicated with the electromagnetic overflow valve in a one-way, the fourth chamber can be communicated with the electromagnetic overflow valve in a one-way, and the third port can be communicated with the second chamber and the fourth chamber in a one-way;
the electromagnetic spill valve is communicated with the second port; the port A of the two-position four-way electromagnetic valve is connected with the hydraulic control one-way valve, and the hydraulic control one-way valve is communicated with the first chamber and the third chamber; the T port of the two-position four-way electromagnetic valve is communicated with the second port; the port B of the two-position four-way electromagnetic valve is communicated with the control port of the hydraulic control one-way valve, and the port B of the two-position four-way electromagnetic valve is communicated with the second chamber or the fourth chamber;
the P port of the three-position four-way electromagnetic valve is communicated with the first port, the T port of the three-position four-way electromagnetic valve is communicated with the second port, the B port of the three-position four-way electromagnetic valve is communicated with the sixth port and the control port of the hydraulic control one-way valve, and the A port of the three-position four-way electromagnetic valve is communicated with the P port of the two-position four-way electromagnetic valve.
Preferably, the hydraulic synchronization control apparatus further includes: and the pressure reducing valve is connected between the P port of the two-position four-way electromagnetic valve and the A port of the three-position four-way electromagnetic valve.
Preferably, a third check valve which is communicated from the second chamber to the electromagnetic relief valve is connected between the second chamber and the electromagnetic relief valve.
Preferably, a fourth check valve which is communicated from the fourth chamber to the electromagnetic relief valve is connected between the fourth chamber and the electromagnetic relief valve.
Preferably, a first one-way valve communicated from the third port to the second chamber is connected between the second chamber and the third port.
Preferably, a second one-way valve communicated from the third port to the fourth chamber is connected between the fourth chamber and the third port.
Preferably, the first valve is a two-position two-way stop valve, and the second valve is a two-position two-way stop valve.
Preferably, when the hydraulic synchronous control device washes the synchronous cylinder, an A port and a P port of the three-position four-way electromagnetic valve are communicated, and a B port and a T port of the three-position four-way electromagnetic valve are communicated; and the P port and the B port of the two-position four-way electromagnetic valve are communicated, and the A port and the T port of the two-position four-way electromagnetic valve are communicated.
Preferably, when the hydraulic synchronous control device charges the synchronous cylinder, an A port and a P port of the three-position four-way electromagnetic valve are communicated, and a B port and a T port of the three-position four-way electromagnetic valve are communicated; and the P port and the A port of the two-position four-way electromagnetic valve are communicated, and the B port and the T port of the two-position four-way electromagnetic valve are communicated.
Preferably, when the hydraulic synchronous control device outputs high-pressure medium to the outside so as to extend a piston rod of the driving hydraulic cylinder, the first valve and the second valve are opened; the port A of the three-position four-way electromagnetic valve is communicated with the port P, and the port B of the three-position four-way electromagnetic valve is communicated with the port T; the P port and the A port of the two-position four-way electromagnetic valve are communicated, and the B port and the T port of the two-position four-way electromagnetic valve are communicated; the set pressure of the electromagnetic overflow valve is higher than the working pressure of an external hydraulic source; when the hydraulic synchronous control device does not output outwards, a piston rod of the driving hydraulic cylinder stays at the extending position, and the first valve and the second valve are closed; the port A and the port B of the three-position four-way electromagnetic valve are communicated with the port T; when the hydraulic synchronous control device outputs high-pressure medium to the outside so as to enable a piston rod of the driving hydraulic cylinder to shrink, a port B and a port P of the three-position four-way electromagnetic valve are communicated, a port A and a port T of the three-position four-way electromagnetic valve are communicated, a non-return function of the hydraulic control one-way valve is closed, the first valve and the second valve are opened, a port B and a port P of the two-position four-way electromagnetic valve are communicated, and a port A and a port T of the two-position four-way electromagnetic valve are communicated.
The technical scheme of the invention has the following remarkable beneficial effects:
the hydraulic synchronous control device is simple to operate, safe and reliable to operate, realizes multi-cylinder synchronous action by adopting a conventional hydraulic element and using simple electric control, has a synchronous error controlled within 0.5%, has more obvious advantages especially under severe working conditions such as high temperature, humidity and the like, and can avoid the high requirements on oil liquid and valves and the high dependence on electric control; after the limit switch is added to realize position monitoring, the hydraulic synchronous control device can automatically run, automatically calibrate and realize one-key operation, so that manual intervention is reduced, the failure rate is reduced, the production continuity is ensured, and the operation efficiency and the production rate are improved. The hydraulic synchronous control device has low investment, low energy consumption and low maintenance rate, and is suitable for popularization and use in multiple fields of multiple industries.
Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
Fig. 1 is a system diagram of a hydraulic synchronous control device connected with a hydraulic cylinder in an external actuator in an embodiment of the present invention.
Reference numerals of the above drawings:
1. a three-position four-way electromagnetic valve; 2. a synchronous cylinder; 21. a rod body; 22. a first piston; 23. a second piston; 24. a first chamber; 25. a second chamber; 26. a third chamber; 27. a fourth chamber; 3. a pressure reducing valve; 4. a two-position four-way electromagnetic valve; 5. a hydraulically controlled one-way valve; 6. a hydraulic source; 7. a first one-way valve; 8. a second one-way valve; 9. a third one-way valve; 11. a fourth one-way valve; 12. a first valve; 13. a second valve; 14. an electromagnetic spill valve; 15. a shuttle valve; 16. a first driving hydraulic cylinder; 17. a second driving hydraulic cylinder; 10. a first port; 20. a second port; 30. a third port; 40. a fourth port; 50. a fifth port; 60. a sixth port; 70. an electrical interface.
Detailed Description
The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The inventor of the application has put forward a kind of hydraulic synchronous control device by virtue of practice and experience of relevant industries engaged in many years, the hydraulic synchronous control device adopts conventional hydraulic elements, uses simple electrical control to realize multi-cylinder synchronous action, has the characteristics of low cost and strong controllability, simultaneously avoids the high requirements on oil liquid, valves and electrical control, and reduces the requirements on working conditions and space.
Fig. 1 is a system diagram of a hydraulic synchronous control device connected with a hydraulic cylinder in an external actuator according to an embodiment of the present invention, as shown in fig. 1, the hydraulic synchronous control device in the embodiment of the present application may include: a three-position four-way electromagnetic valve 1, a hydraulic control one-way valve 5, a two-position four-way electromagnetic valve 4, a synchronous cylinder 2, a first valve 12, a second valve 13 and an electromagnetic overflow valve 14, wherein the three-position four-way electromagnetic valve 1, the second port 20 and the third port 30 are used for connecting a first port 10, a second port 20 and a third port 30 with a hydraulic source 6, and the four ports 40, the fifth port 50 and the sixth port 60 are used for connecting a first driving hydraulic cylinder 16 and a second driving hydraulic cylinder 17; the synchronous cylinder 2 comprises a first cylinder body, a second cylinder body, a rod body 21 capable of moving and penetrating between the first cylinder body and the second cylinder body, a first piston 22 and a second piston 23 connected to the rod body 21, wherein the first piston 22 divides the first cylinder body into a first chamber 24 and a second chamber 25, and the second piston 23 divides the second cylinder body into a third chamber 26 and a fourth chamber 27; the second chamber 25 is communicated with the first valve 12, the fourth chamber 27 is communicated with the second valve 13, the second chamber 25 can be communicated with the electromagnetic overflow valve 14 in a unidirectional way, the fourth chamber 27 can be communicated with the electromagnetic overflow valve 14 in a unidirectional way, and the third port 30 can be communicated with the second chamber 25 and the fourth chamber 27 in a unidirectional way; electromagnetic spill valve 14 communicates with second port 20; the port A of the two-position four-way electromagnetic valve 4 is connected with a hydraulic control one-way valve 5, and the hydraulic control one-way valve 5 is communicated with a first chamber 24 and a third chamber 26; the T port of the two-position four-way electromagnetic valve 4 is communicated with the second port 20; the B port of the two-position four-way electromagnetic valve 4 is communicated with the control port of the hydraulic control one-way valve 5, and the B port of the two-position four-way electromagnetic valve 4 is communicated with the second chamber 25 or the fourth chamber 27; the P port of the three-position four-way electromagnetic valve 1 is communicated with the first port 10, the T port of the three-position four-way electromagnetic valve 1 is communicated with the second port 20, the B port of the three-position four-way electromagnetic valve 1 is communicated with the sixth port 60 and the control port of the hydraulic control one-way valve 5, and the A port of the three-position four-way electromagnetic valve 1 is communicated with the P port of the two-position four-way electromagnetic valve 4.
As shown in fig. 1, the first port 10, the second port 20 and the third port 30 of the hydraulic synchronous control device are used for being connected with the hydraulic source 6, wherein the hydraulic source 6 inputs high-pressure medium through the first port 10, the second port 20 of the hydraulic synchronous control device is used for discharging the hydraulic medium to the hydraulic source 6, and the oil tank of the hydraulic source 6 inputs the hydraulic medium to the hydraulic synchronous control device through the third port 30. The fourth port 40 and the fifth port 50 of the hydraulic synchronous control device are used for outputting hydraulic medium to the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 in the external mechanical arrangement, respectively, and the sixth port 60 of the hydraulic synchronous control device is used for recovering the hydraulic medium in the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17.
As shown in fig. 1, the three-position four-way electromagnetic valve 1 has three position states, when the electromagnet on the a side of the three-position four-way electromagnetic valve 1 is electrified, the port A of the three-position four-way electromagnetic valve 1 is communicated with the port T, and the port B is communicated with the port P; when the electromagnet on the side B of the three-position four-way electromagnetic valve 1 is electrified, the port A of the three-position four-way electromagnetic valve 1 is communicated with the port P, and the port B is communicated with the port T; when the three-position four-way electromagnetic valve 1 is powered off, the valve core is restored to the normal position, and at the moment, the port A and the port B of the three-position four-way electromagnetic valve 1 are communicated with the port T. The P port of the three-position four-way electromagnetic valve 1 is communicated with the first port 10, the T port of the three-position four-way electromagnetic valve 1 is communicated with the second port 20, the B port of the three-position four-way electromagnetic valve 1 is communicated with the sixth port 60 and the control port of the hydraulic control one-way valve 5, and the A port of the three-position four-way electromagnetic valve 1 is communicated with the P port of the two-position four-way electromagnetic valve 4. Wherein, a pressure reducing valve 3 can be connected between the P port of the two-position four-way electromagnetic valve 4 and the A port of the three-position four-way electromagnetic valve 1. A shuttle valve 15 is connected between the B port of the three-position four-way electromagnetic valve 1 and the control port of the hydraulic control one-way valve 5, a second port of the shuttle valve 15 is connected with the B port of the three-position four-way electromagnetic valve 1, a third port of the shuttle valve 15 is connected with the control port of the hydraulic control one-way valve 5, and a first port of the shuttle valve 15 is connected with the B port of the two-position four-way electromagnetic valve 4. In the shuttle valve 15, the first port and the second port of the shuttle valve 15 cannot be simultaneously connected to the third port.
As shown in fig. 1, the two-position four-way solenoid valve 4 has two position states, and when the electromagnet on the B side of the two-position four-way solenoid valve 4 is energized, the port of the two-position four-way solenoid valve 4A communicates with the P port, and the port B communicates with the T port. When the two-position four-way electromagnetic valve 4 is powered off, the valve core is restored to the normal position, and at the moment, the port A of the two-position four-way electromagnetic valve 4 is communicated with the port T, and the port B is communicated with the port P. The port A of the two-position four-way electromagnetic valve 4 is connected with the hydraulic control one-way valve 5, and the port T of the two-position four-way electromagnetic valve 4 is communicated with the second port 20; the B port of the two-position four-way solenoid valve 4 is communicated with the control port of the pilot operated check valve 5, i.e. connected with the first port of the shuttle valve 15, and the B port of the two-position four-way solenoid valve 4 is also communicated with the second chamber 25 or the fourth chamber 27.
As shown in fig. 1, the synchronous cylinder 2 may include a first cylinder body, a second cylinder body, a rod body 21 penetrating between the first cylinder body and the second cylinder body and capable of moving, a first piston 22 and a second piston 23 connected to the rod body 21, the first piston 22 dividing the first cylinder body into a first chamber 24 and a second chamber 25, and the second piston 23 dividing the second cylinder body into a third chamber 26 and a fourth chamber 27. The function of synchronous action can be realized by the driving of the rod body 21 between the first piston 22 and the second piston 23. The synchronous cylinder 2 may be a synchronous cylinder 2 having a supercharging function, which can realize both a synchronous operation function and a use of driving a large load with a small actuator.
As shown in fig. 1, the pilot operated check valve 5 communicates with the first chamber 24 and the third chamber 26. The second chamber 25 is communicated with the first valve 12, the fourth chamber 27 is communicated with the second valve 13, the first valve 12 can be a two-position two-way stop valve, and the second valve 13 can be a two-position two-way stop valve, and the two valves can be in a connected state and a disconnected state through electric control.
As shown in fig. 1, second chamber 25 may be in one-way communication with electromagnetic spill valve 14, and fourth chamber 27 may be in one-way communication with electromagnetic spill valve 14. Specifically, third check valve 9 that is connected between second chamber 25 and electromagnetic spill valve 14 and is connected to electromagnetic spill valve 14 from second chamber 25. A fourth check valve 11 that is connected between fourth chamber 27 and electromagnetic spill valve 14 and is connected to electromagnetic spill valve 14 from fourth chamber 27.
As shown in fig. 1, the third port 30 can be in unidirectional communication with the second and fourth chambers 25, 27. Specifically, the first check valve 7 that is connected between the second chamber 25 and the third port 30 and is connected to the second chamber 25 through the third port 30. A second check valve 8 is connected between the fourth chamber 27 and the third port 30, and is connected to the fourth chamber 27 from the third port 30.
As shown in fig. 1, the pilot operated check valve 5 is capable of being opened to the first chamber 24 or the third chamber 26 of the synchronous cylinder 2 only from the port a of the two-position four-way solenoid valve 4 in a normal state. When the control port of the hydraulic control one-way valve 5 inputs high-pressure medium, the check function of the hydraulic control one-way valve 5 fails to be closed, and the first chamber 24 or the third chamber 26 of the synchronous cylinder 2 can be conducted to the port A of the two-position four-way electromagnetic valve 4.
The three-position four-way electromagnetic valve 1, the two-position four-way electromagnetic valve 4, the first valve 12, the second valve 13 and the electromagnetic overflow valve 14 in the hydraulic synchronous control device can be electrically connected to an electrical control system, so that remote automatic control is realized, and the hydraulic synchronous control device can also be operated on site. The hydraulic synchronization control also has an electrical interface 70 for inputting an operating current, for example, the input requirement of the electrical interface 70 may be a voltage of AC380V/50 Hz.
In this application, start external hydraulic pressure source 6 and power and operate hydraulic pressure synchronous control device and can promote mechanical equipment to accomplish synchronous lift function, can also accomplish the locking function simultaneously, wash with the oil function of mending, the pressure release function.
The operation process of the flushing and oil supplementing functions in the hydraulic synchronous control device in the application is as follows: the electromagnet on the side B of the three-position four-way electromagnetic valve 1 is electrified, the port A of the three-position four-way electromagnetic valve 1 is communicated with the port P, the port B of the three-position four-way electromagnetic valve 1 is communicated with the port T, and a high-pressure medium of the hydraulic source 6 enters the port P of the two-position four-way electromagnetic valve 4 through the first port 10, the port A, the port P and the pressure reducing valve 3 of the three-position four-way electromagnetic valve 1. The two-position four-way electromagnetic valve 4 is not electrified, the P port and the B port of the two-position four-way electromagnetic valve 4 are communicated, the A port and the T port of the two-position four-way electromagnetic valve 4 are communicated, the high-pressure medium is communicated with the B port of the two-position four-way electromagnetic valve 4, the B port of the two-position four-way electromagnetic valve 4 is communicated with the B port (corresponding to the fourth chamber 27 or the second chamber 25) of the synchronous cylinder 2, after the high-pressure medium enters the synchronous cylinder 2 and builds pressure, the high-pressure medium enters the first port of the shuttle valve 15, the first port of the shuttle valve 15 is communicated with the third port at the same time, the third port of the high-pressure medium enters the control port of the hydraulic control one-way valve 5, so that the backstop function of the hydraulic control one-way valve 5 is closed, and at the moment, the low-pressure medium in the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 enters the A port of the two-position four-way electromagnetic valve 4 after passing through the hydraulic control one-way valve 5 and flows back to the oil tank of the hydraulic source 6 from the T port of the two-position four-way electromagnetic valve 4. The second chamber 25 and the fourth chamber 27 of the synchronizing cylinder 2 are increased in volume due to the movement of the rod body 21, the internal pressure is reduced, and when the internal pressure of the tank of the hydraulic pressure source 6 is lower, the hydraulic medium is introduced into the second chamber 25 and the fourth chamber 27 of the synchronizing cylinder 2 through the first check valve 7 and the second check valve 8 until the hydraulic medium fills the second chamber 25 and the fourth chamber 27. At this time, the rod 21 in the synchronizing cylinder 2 also undergoes a unidirectional action from right to left. The flushing operation is completed through the steps.
Then, the electromagnet on the B side of the three-position four-way electromagnetic valve 1 is electrified, a high-pressure medium enters the two-position four-way electromagnetic valve 4 through the three-position four-way electromagnetic valve 1 and the pressure reducing valve 3, the electromagnet on the B side of the two-position four-way electromagnetic valve 4 is electrified, the P port and the A port of the two-position four-way electromagnetic valve 4 are communicated, and the B port and the T port of the two-position four-way electromagnetic valve 4 are communicated. The high-pressure medium is communicated with the A port of the two-position four-way electromagnetic valve 4, the A port of the two-position four-way electromagnetic valve 4 is communicated with the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 through the hydraulic control one-way valve 5, and after the high-pressure medium enters the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 and builds pressure, the rod body 21 of the synchronous cylinder 2 is pushed to move from left to right, and at the moment, the hydraulic medium of the second chamber 25 and the fourth chamber 27 passes through the third one-way valve 9 and the fourth one-way valve 11 and then reaches the electromagnetic overflow valve 14. The electromagnetic relief valve 14 is powered on by the pilot valve electromagnet, and the electromagnetic relief valve 14 is depressurized. The hydraulic medium passes through the electromagnetic spill valve 14 and then reaches the tank of the hydraulic pressure source 6. At this time, the rod 21 of the synchronous cylinder 2 is again moved from left to right. The refueling operation is completed through the above-described process. After that, all the electromagnetic valves are powered off, the valve core is restored to the normal position, and the valve core is reciprocated in this way, so that the flushing and the oiling of the synchronous cylinder 2 are realized.
The hydraulic synchronous control device in the application pushes the mechanical equipment to complete the operation process of synchronous lifting function as follows: first, the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 in the mechanical equipment are reset, and the piston rods of the first driving hydraulic cylinder and the second driving hydraulic cylinder are completely retracted. The second chamber 25 and the fourth chamber 27 of the synchronizing cylinder 2 are filled with oil and the rod 21 is in the left position. Then, the first valve 12 and the second valve 13 are energized to be in an open communication state, and at this time, the ports a of the first drive cylinder 16 and the second drive cylinder 17 are completely communicated with the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2, respectively. The electromagnet on the side b of the three-position four-way electromagnetic valve 1 is electrified, a high-pressure medium enters the two-position four-way electromagnetic valve 4 through the three-position four-way electromagnetic valve 1 and the pressure reducing valve 3, the electromagnet on the side b of the two-position four-way electromagnetic valve 4 is electrified, the high-pressure medium is communicated with an A port of the two-position four-way electromagnetic valve 4, after the high-pressure medium enters the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 and builds pressure, the rod body 21 of the synchronous cylinder 2 is pushed to move from left to right, and at the moment, the hydraulic medium of the second chamber 25 and the fourth chamber 27 passes through the third one-way valve 9 and the fourth one-way valve 11 and then reaches the electromagnetic overflow valve 14. At this time, the set pressure of the electromagnetic spill valve 14 is higher than the operating pressure of the external hydraulic pressure source 6, so that pressure cannot be released. The hydraulic medium in the second chamber 25 and the fourth chamber 27 can flow only through the first valve 12, the second valve 13 to the a ports of the first driving cylinder 16 and the second driving cylinder 17. The piston rods of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 extend simultaneously to drive the mechanical equipment to rise synchronously. The port B of the first driving hydraulic cylinder 16 and the port B of the second driving hydraulic cylinder 17 are communicated, and the hydraulic medium in the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 flows back to the port B of the three-position four-way electromagnetic valve 1, flows through the port T of the three-position four-way electromagnetic valve 1 and returns to the oil tank of the hydraulic source 6.
The locking function of the hydraulic synchronous control device in the present application (i.e. the piston rod of the driving hydraulic cylinder is stopped in the extended position) operates as follows: when the piston rods of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 extend, the first valve 12 and the second valve 13 are closed to be in a non-communication state, so that the port A of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 is completely disconnected from the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2. The electromagnet on the side B of the three-position four-way electromagnetic valve 1 is powered off, the valve core returns to the normal position, the valve core is sealed by P, the port A and the port B of the three-position four-way electromagnetic valve 1 are communicated with the port T, and the high-pressure medium is disconnected. The piston rods of the first drive cylinder 16 and the second drive cylinder 17 stay in the extended position, when the synchronizing cylinder 2 does not reach the right-hand limit position.
The hydraulic synchronous control device in the application pushes the mechanical equipment to complete the operation process of synchronous lowering function (namely, the piston rod of the driving hydraulic cylinder is contracted) as follows: the electromagnet on the a side of the three-position four-way electromagnetic valve 1 is electrified, the port B of the three-position four-way electromagnetic valve 1 is communicated with the port P, the port A of the three-position four-way electromagnetic valve 1 is communicated with the port T, a high-pressure medium enters the port B of the first driving hydraulic cylinder 16 and the port B of the second driving hydraulic cylinder 17 through the port B of the three-position four-way electromagnetic valve 1, meanwhile, one branch oil way of the high-pressure medium enters the second port of the shuttle valve 15, and finally enters the control port of the hydraulic control one-way valve 5 through the third port, so that the non-return function of the hydraulic control one-way valve 5 is closed. At this time, the first valve 12 and the second valve 13 are opened to communicate, and the high-pressure medium is returned from the ports a of the first drive cylinder 16 and the second drive cylinder 17 to the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2 through the first valve 12 and the second valve 13, respectively. The first chamber 24 and the third chamber 26 of the synchronous cylinder 2 are communicated with an A port of the two-position four-way electromagnetic valve 4 by a hydraulic control check valve 5 with non-return function, at the moment, a B port of the two-position four-way electromagnetic valve 4 is communicated with a P port, and an A port of the two-position four-way electromagnetic valve 4 is communicated with a T port. So the high pressure medium is directly returned to the oil tank of the hydraulic source 6 through the two-position four-way electromagnetic valve 4, and the pressure also disappears. The medium pressure entering the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2 is larger than the medium pressure flowing out of the first chamber 24 and the third chamber 26 of the synchronous cylinder 2, the rod body 21 of the synchronous cylinder 2 moves from right to left, the piston rods of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 start to descend, and after the piston rods of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 are completely retracted. Finally, the electromagnet at the a side of the three-position four-way electromagnetic valve 1 is powered off, the valve core returns to the normal position, the P is sealed, the high-pressure medium is disconnected, the first valve 12 and the second valve 13 are closed and disconnected, and therefore the port A of the first driving hydraulic cylinder 16 and the port A of the second driving hydraulic cylinder 17 are completely disconnected from the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2, and the rod body 21 of the synchronous cylinder 2 also completely reaches the left limit.
After multiple tests, the left and right limit positions of the synchronous cylinder 2 correspond to the high and low positions of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17, and form a fixed matching relationship. In consideration of the positional relationship disturbance caused by the problems of oil leakage in the pipeline or internal leakage of the drive cylinders, the subsequent occurrence is inevitably asynchronous of the first drive cylinder 16 and the second drive cylinder 17. For this reason, when the first drive cylinder 16 and the second drive cylinder 17 are in the low position, position calibration is automatically performed, ensuring the synchronicity of the first drive cylinder 16 and the second drive cylinder 17. The calibration process is the same as the flushing process, except that the rod body 21 of the synchronous cylinder 2 is pushed to the left limit from the left limit position and then returned to the right limit position.
For example, the hydraulic synchronous control device can be used for controlling the lifting of the tundish car, after the hydraulic synchronous control device is manufactured, the pressure test and the performance test are required, the hydraulic synchronous control device is installed on the tundish car after being qualified, meanwhile, the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 are installed according to the requirements, and the external hydraulic source 6, the hydraulic synchronous control device and the pipeline connection between the hydraulic synchronous control device and the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 are performed. Before use, the pipeline is required to be flushed and tested, and the power, the output pressure and the like of the external hydraulic source 6 are required to be debugged and confirmed. The left and right limit positions of the synchronous cylinder 2 correspond to the high positions of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17, and limit switches are arranged at the left and right limit positions of the synchronous cylinder 2 so as to monitor whether the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 are in place. The initial position is set to drive the cylinder in a low position (cylinder piston rod fully retracted state). The electric control panel is operated, the 'rising' button is pressed, the electromagnet on the b side of the three-position four-way electromagnetic valve 1 and the electromagnet on the b side of the two-position four-way electromagnetic valve 4 are powered on, and the first valve 12 and the second valve 13 are opened for communication after 2 seconds of delay. The high-pressure medium enters the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 through the three-position four-way electromagnetic valve 1, the pressure reducing valve 3, the two-position four-way electromagnetic valve 4 and the hydraulic control one-way valve 5 to push the pistons of the synchronous cylinder 2 to move from left to right, at this time, the oil in the second chamber 25 and the fourth chamber 27 generates pressure matched with loads due to extrusion of the first chamber 24 and the third chamber 26, oil supply is started to the ports A of the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17, the two driving hydraulic cylinders start to synchronously ascend, when the driving hydraulic cylinders ascend to the rated position, the corresponding synchronous cylinder 2 also moves to a position, can be marked as a position A, at this time is limited by Guan Fa signals, the three-position four-way electromagnetic valve 1 and the two-position four-way electromagnetic valve 4 are powered off, the first valve 12 and the second valve 13 are closed and disconnected, and the positions of the driving hydraulic cylinders are locked. The electric control panel is operated, the descending button is pressed, the first valve 12 and the second valve 13 are opened and communicated, and the a-side electromagnet of the three-position four-way electromagnetic valve 1 is delayed for 2 seconds to obtain electricity. The high-pressure medium enters into the B port of the driving hydraulic cylinder through the three-position four-way electromagnetic valve 1, corresponding pressure is quickly built, meanwhile, one path of medium branches enters into the second port of the shuttle valve 15 and is transmitted to the third port through the second port, finally, the medium reaches the control port of the hydraulic control one-way valve 5, the backstop function of the hydraulic control one-way valve 5 is closed, the medium of the first driving hydraulic cylinder 16 and the medium of the second driving hydraulic cylinder 17 enter into the second chamber 25 and the fourth chamber 27 of the synchronous cylinder 2 through the first valve 12 and the second valve 13, the rod body 21 of the synchronous cylinder 2 is pushed to move from right to left, the medium of the first chamber 24 and the third chamber 26 of the synchronous cylinder 2 flows into the oil tank of the hydraulic source 6 through the hydraulic control one-way valve 5 and the two-position four-way electromagnetic valve 4, the first driving hydraulic cylinder 16 and the second driving hydraulic cylinder 17 start to descend synchronously, the synchronous cylinder 2 also moves to the limit position on the left side after descending, the limit position B is marked as position B, the limit switch Guan Fa is signaled, the three-position electromagnetic valve 1 is deenergized, the rod body 21 of the synchronous cylinder 2 is pushed to move from right to left, the first valve 12 and the second valve 13 is closed, the first chamber 24 and the position of the driving hydraulic cylinder 17 is locked.
The hydraulic synchronous control device has the following beneficial effects: the hydraulic synchronous control device is simple to operate, safe and reliable to operate, adopts a conventional hydraulic element, realizes multi-cylinder synchronous action by using simple electric control, has a synchronous error controlled within 0.5%, has more obvious advantages especially under severe working conditions such as high temperature, humidity and the like, and can avoid the high requirements on oil liquid and valves and the high dependence on electric control; after the limit switch is added to realize position monitoring, the hydraulic synchronous control device can automatically run, automatically calibrate and realize one-key operation, so that manual intervention is reduced, the failure rate is reduced, the production continuity is ensured, and the operation efficiency and the production rate are improved. The hydraulic synchronous control device has low investment, low energy consumption and low maintenance rate, and is suitable for popularization and use in multiple fields of multiple industries.
All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A hydraulic synchronization control apparatus, characterized by comprising:
the hydraulic control system comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a two-position four-way electromagnetic valve, a synchronous cylinder, a first valve, a second valve and an electromagnetic overflow valve, wherein the first port, the second port and the third port are used for being connected with a hydraulic source, and the fourth port, the fifth port and the sixth port are used for being connected with a first driving hydraulic cylinder and a second driving hydraulic cylinder;
the synchronous cylinder comprises a first cylinder body, a second cylinder body, a rod body capable of moving and penetrating between the first cylinder body and the second cylinder body, and a first piston and a second piston which are connected to the rod body, wherein the first piston divides the first cylinder body into a first chamber and a second chamber, and the second piston divides the second cylinder body into a third chamber and a fourth chamber; the second chamber is communicated with the first valve, the fourth chamber is communicated with the second valve, the second chamber can be communicated with the electromagnetic overflow valve in a one-way, the fourth chamber can be communicated with the electromagnetic overflow valve in a one-way, and the third port can be communicated with the second chamber and the fourth chamber in a one-way;
the electromagnetic overflow valve is communicated with the second port, the port A of the two-position four-way electromagnetic valve is connected with the hydraulic control one-way valve, and the hydraulic control one-way valve is communicated with the first chamber and the third chamber; the T port of the two-position four-way electromagnetic valve is communicated with the second port, the B port of the two-position four-way electromagnetic valve is communicated with the control port of the hydraulic control one-way valve, and the B port of the two-position four-way electromagnetic valve is communicated with the second chamber or the fourth chamber;
the P port of the three-position four-way electromagnetic valve is communicated with a first port, the T port of the three-position four-way electromagnetic valve is communicated with a second port, the B port of the three-position four-way electromagnetic valve is communicated with a sixth port and a control port of the hydraulic control one-way valve, and the A port of the three-position four-way electromagnetic valve is communicated with the P port of the two-position four-way electromagnetic valve;
a shuttle valve is connected between the port B of the three-position four-way electromagnetic valve and the control port of the hydraulic control one-way valve, a second port of the shuttle valve is connected with the port B of the three-position four-way electromagnetic valve, a third port of the shuttle valve is connected with the control port of the hydraulic control one-way valve, a first port of the shuttle valve is connected with the port B of the two-position four-way electromagnetic valve, and in the shuttle valve, the first port and the second port of the shuttle valve cannot be simultaneously conducted to the third port.
2. The hydraulic synchronization control device according to claim 1, characterized in that the hydraulic synchronization control device further comprises: and the pressure reducing valve is connected between the P port of the two-position four-way electromagnetic valve and the A port of the three-position four-way electromagnetic valve.
3. The hydraulic synchronous control apparatus according to claim 1, wherein a third check valve that is communicated from the second chamber to the electromagnetic spill valve is connected between the second chamber and the electromagnetic spill valve.
4. The hydraulic synchronous control apparatus according to claim 1, wherein a fourth check valve that is communicated from the fourth chamber to the electromagnetic spill valve is connected between the fourth chamber and the electromagnetic spill valve.
5. The hydraulic synchronous control device according to claim 1, wherein a first check valve that is communicated from the third port to the second chamber is connected between the second chamber and the third port.
6. The hydraulic synchronous control device according to claim 1, wherein a second check valve that is communicated from the third port to the fourth chamber is connected between the fourth chamber and the third port.
7. The hydraulic synchronization control device according to claim 1, wherein the first valve is a two-position two-way stop valve and the second valve is a two-position two-way stop valve.
8. The hydraulic synchronous control device according to claim 1, wherein when the hydraulic synchronous control device flushes the synchronous cylinder, an a port and a P port of the three-position four-way solenoid valve are communicated, and a B port and a T port of the three-position four-way solenoid valve are communicated; and the P port and the B port of the two-position four-way electromagnetic valve are communicated, and the A port and the T port of the two-position four-way electromagnetic valve are communicated.
9. The hydraulic synchronization control device according to claim 1, wherein when the hydraulic synchronization control device refuels the synchronization cylinder, an a port and a P port of the three-position four-way solenoid valve are communicated, and a B port and a T port of the three-position four-way solenoid valve are communicated; and the P port and the A port of the two-position four-way electromagnetic valve are communicated, and the B port and the T port of the two-position four-way electromagnetic valve are communicated.
10. The hydraulic synchronous control apparatus according to claim 1, wherein the first valve and the second valve are opened when the hydraulic synchronous control apparatus outputs a high-pressure medium to the outside to extend a piston rod of a driving hydraulic cylinder; the port A of the three-position four-way electromagnetic valve is communicated with the port P, and the port B of the three-position four-way electromagnetic valve is communicated with the port T; the P port and the A port of the two-position four-way electromagnetic valve are communicated, and the B port and the T port of the two-position four-way electromagnetic valve are communicated; the set pressure of the electromagnetic overflow valve is higher than the working pressure of an external hydraulic source; when the hydraulic synchronous control device does not output outwards, a piston rod of the driving hydraulic cylinder stays at the extending position, and the first valve and the second valve are closed; the port A and the port B of the three-position four-way electromagnetic valve are communicated with the port T; when the hydraulic synchronous control device outputs high-pressure medium to the outside so as to enable a piston rod of the driving hydraulic cylinder to shrink, a port B and a port P of the three-position four-way electromagnetic valve are communicated, a port A and a port T of the three-position four-way electromagnetic valve are communicated, a non-return function of the hydraulic control one-way valve is closed, the first valve and the second valve are opened, a port B and a port P of the two-position four-way electromagnetic valve are communicated, and a port A and a port T of the two-position four-way electromagnetic valve are communicated.
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| CN201811597106.9A CN109505813B (en) | 2018-12-26 | 2018-12-26 | Hydraulic synchronous control device |
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| CN201811597106.9A CN109505813B (en) | 2018-12-26 | 2018-12-26 | Hydraulic synchronous control device |
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| CN102852871A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Hydraulic system for jacking top cover in loosening reactor top cover |
| CN203994836U (en) * | 2014-07-14 | 2014-12-10 | 江苏建筑职业技术学院 | For the hydraulic control system of cuber |
| CN104358725A (en) * | 2014-10-30 | 2015-02-18 | 大连华锐重工集团股份有限公司 | Synchronous cylinder control middle tank ascending and descending device |
| CN105545848A (en) * | 2016-01-05 | 2016-05-04 | 广东思豪液压机械有限公司 | Hydraulic control system for precisely synchronizing two side cylinders of tube hydroforming hydraulic machine |
| CN209294157U (en) * | 2018-12-26 | 2019-08-23 | 中冶京诚工程技术有限公司 | Hydraulic synchronous control device |
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| CN102852871A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Hydraulic system for jacking top cover in loosening reactor top cover |
| CN203994836U (en) * | 2014-07-14 | 2014-12-10 | 江苏建筑职业技术学院 | For the hydraulic control system of cuber |
| CN104358725A (en) * | 2014-10-30 | 2015-02-18 | 大连华锐重工集团股份有限公司 | Synchronous cylinder control middle tank ascending and descending device |
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