CN110725820B - Hydraulic synchronous control system - Google Patents
Hydraulic synchronous control system Download PDFInfo
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- CN110725820B CN110725820B CN201910830514.2A CN201910830514A CN110725820B CN 110725820 B CN110725820 B CN 110725820B CN 201910830514 A CN201910830514 A CN 201910830514A CN 110725820 B CN110725820 B CN 110725820B
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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
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Abstract
The invention discloses a hydraulic synchronous control system which comprises a hydraulic oil source, a first electromagnetic directional valve, a four-chamber hydraulic cylinder, a normally-open type proximity switch, a normally-closed type proximity switch, a second electromagnetic directional valve, a third electromagnetic directional valve, a first load oil path, a second load oil path and a relay contactor, wherein the hydraulic oil source is connected with an inlet of the four-chamber hydraulic cylinder through the first electromagnetic directional valve, and outlets of the four-chamber hydraulic cylinder are respectively connected with the first load oil path and the second load oil path through the second electromagnetic directional valve and the third electromagnetic directional valve; the normally open type proximity switch and the normally closed type proximity switch are respectively connected with the relay; the relay, the normally open proximity switch, the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve are respectively connected with a control power supply high voltage L and a control power supply ground wire N. The advantages are that: the high-precision continuous synchronous control of the flow is realized by continuously and automatically switching the motion direction of the synchronous hydraulic cylinder and the working cavity.
Description
Technical Field
The technology relates to a hydraulic synchronous control system, and belongs to the field of hydraulic control.
Background
The flow synchronization is a great problem of a hydraulic system, and has been concerned by scholars at home and abroad for a long time. At present, three solutions of a flow distributing and collecting valve, a synchronous motor and a synchronous hydraulic cylinder are mainly used for flow synchronization of a hydraulic system. However, due to the existence of problems such as leakage and the like, the flow dividing and collecting valve and the synchronous motor have the problem of low synchronization precision; limited by limited stroke, the synchronous hydraulic cylinder has the problem of limited synchronous flow, and long-time continuous synchronization cannot be realized.
Disclosure of Invention
The invention aims to solve the problems that the existing precision is low and the long-time continuous synchronization cannot be realized, and provides a technology for high-precision continuous synchronous control of flow. The technical scheme is as follows:
a hydraulic synchronous control system comprises a hydraulic control loop and an electric control loop, wherein the hydraulic control loop comprises a hydraulic oil source, a first load oil path, a second load oil path and a four-chamber hydraulic cylinder; the four-chamber hydraulic cylinder comprises four cylinder barrels with the same inner diameter, namely a first hydraulic oil chamber, a second hydraulic oil chamber, a third hydraulic oil chamber and a fourth hydraulic oil chamber, wherein the first hydraulic oil chamber is connected with an inlet of the third hydraulic oil chamber, and the second hydraulic oil chamber is connected with an inlet of the fourth hydraulic oil chamber; coaxial piston rods are arranged in the four-cavity hydraulic cylinder; the electric control loop comprises a first electromagnetic directional valve, a second electromagnetic directional valve, a third electromagnetic directional valve, a normally open type proximity switch, a normally closed type proximity switch and a relay contactor; the hydraulic oil source is connected with the inlet of the four-chamber hydraulic cylinder through a first electromagnetic directional valve; outlets of the first hydraulic oil cavity and the third hydraulic oil cavity are respectively connected with the first load oil way and the second load oil way through a second electromagnetic reversing valve; outlets of the second hydraulic oil cavity and the fourth hydraulic oil cavity are respectively connected with the first load oil way and the second load oil way through a third electromagnetic directional valve; the normally open type proximity switch and the normally closed type proximity switch are respectively connected with the relay contactor.
Preferably, the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve are two-position four-way electromagnetic directional valves.
Preferably, the hydraulic oil source enters from a port A of the first electromagnetic directional valve, is connected with the first hydraulic oil cavity and the third hydraulic oil cavity through a port C, and is connected with the second hydraulic oil cavity and the fourth hydraulic oil cavity through a port D; an outlet of the first hydraulic oil cavity is connected with an A port of the second electromagnetic reversing valve, an outlet of the third hydraulic oil cavity is connected with a B port of the second electromagnetic reversing valve, an outlet of the second hydraulic oil cavity is connected with the A port of the third electromagnetic reversing valve, and an outlet of the fourth hydraulic oil cavity is connected with the B port of the third electromagnetic reversing valve; the port C of the second electromagnetic directional valve and the port C of the third electromagnetic directional valve are connected with a second load oil way; and a port D of the second electromagnetic directional valve and a port D of the third electromagnetic directional valve are connected with the first load oil way.
Preferably, the end A of the relay contactor, the end A of the normally-open proximity switch and the end E of the relay contactor are connected with a control power supply high voltage L; the terminal B of the relay contactor and the terminal B of the normally-open type proximity switch are connected with the terminal A of the normally-closed type proximity switch; the end B of the normally closed proximity switch is connected with the end C of the relay contactor; the end F of the relay contactor is connected with the end EX of the first electromagnetic reversing valve, the end EX of the second electromagnetic reversing valve and the end EX of the third electromagnetic reversing valve; and the D end of the relay contactor, the EY end of the first electromagnetic reversing valve, the EY end of the second electromagnetic reversing valve and the EY end of the third electromagnetic reversing valve are connected with a control power supply ground wire N.
Compared with the prior art, its advantage lies in: the first hydraulic oil chamber and the third hydraulic oil chamber have the same cylinder barrel inner diameter and piston rod outer diameter, and the moving speeds of the first hydraulic oil chamber and the third hydraulic oil chamber are the same; the second hydraulic oil cavity and the fourth hydraulic oil cavity have the same cylinder bore diameter and piston rod outer diameter, and the moving speeds of the second hydraulic oil cavity and the fourth hydraulic oil cavity are the same, so that the flow of the first load oil way and the flow of the second load oil way are synchronous; the continuous automatic switching between the motion direction of the hydraulic cylinder and the working cavity is realized through circuit control, and the high-precision continuous synchronous control of the flow is realized.
Drawings
FIG. 1 is a control schematic of the present invention;
the labels in the figure are: a. the hydraulic control circuit comprises a hydraulic control circuit, a b electrical control circuit, a 1 hydraulic oil source, a 2 oil return circuit, a 3 first electromagnetic directional valve, a 4 four-chamber hydraulic cylinder, a 401 first hydraulic oil chamber, a 402 second hydraulic oil chamber, a 403 third hydraulic oil chamber, a 404 fourth hydraulic oil chamber, a 5 normally open type proximity switch, a 6 normally closed type proximity switch, a 7 second electromagnetic directional valve, a 8 third electromagnetic directional valve, a 9 first load circuit, a 10 second load circuit and a 11 relay contactor.
Detailed Description
The following further description of the technology will be provided in conjunction with fig. 1 and the specific embodiments to aid in understanding the present invention.
A hydraulic synchronous control system comprises a hydraulic control loop a and an electric control loop b, wherein the hydraulic control loop a comprises a hydraulic oil source 1, a first load oil path 9, a second load oil path 10 and a four-chamber hydraulic cylinder 4; the four-chamber hydraulic cylinder 4 comprises four cylinder barrels with the same inner diameter, namely a first hydraulic oil chamber 401, a second hydraulic oil chamber 402, a third hydraulic oil chamber 403 and a fourth hydraulic oil chamber 404, wherein the first hydraulic oil chamber 401 is connected with an inlet of the third hydraulic oil chamber 403, and the second hydraulic oil chamber 402 is connected with an inlet of the fourth hydraulic oil chamber 404; the four-chamber hydraulic cylinder 4 is provided with a coaxial piston rod; the electric control circuit b comprises a first electromagnetic directional valve 3, a second electromagnetic directional valve 7, a third electromagnetic directional valve 8, a normally open type proximity switch 5, a normally closed type proximity switch 6 and a relay contactor 11; the hydraulic oil source 1 is connected with the inlet of a four-chamber hydraulic cylinder 4 through a first electromagnetic directional valve 3, and the outlets of a first hydraulic oil chamber 401 and a third hydraulic oil chamber 403 are respectively connected with a first load oil path 9 and a second load oil path 10 through a second electromagnetic directional valve 7; outlets of the second hydraulic oil cavity 402 and the fourth hydraulic oil cavity 404 are respectively connected with a first load oil way 9 and a second load oil way 10 through a third electromagnetic directional valve 8; the normally open proximity switch 5 and the normally closed proximity switch 6 are connected to a relay 11, respectively.
The first electromagnetic directional valve 3, the second electromagnetic directional valve 7 and the third electromagnetic directional valve 8 are two-position four-way electromagnetic directional valves.
The hydraulic oil source 1 enters from a port A of the first electromagnetic directional valve 3, is connected with a first hydraulic oil cavity 401 and a third hydraulic oil cavity 403 through a port C, is connected with a second hydraulic oil cavity 402 and a fourth hydraulic oil cavity 404 through a port D, and the oil return way 2 is connected with a port B of the first electromagnetic directional valve 3; an outlet of the first hydraulic oil chamber 401 is connected with a port A of the second electromagnetic reversing valve 7, an outlet of the third hydraulic oil chamber 403 is connected with a port B of the second electromagnetic reversing valve, an outlet of the second hydraulic oil chamber 402 is connected with a port A of the third electromagnetic reversing valve 8, and an outlet of the fourth hydraulic oil chamber 404 is connected with a port B of the third electromagnetic reversing valve 8; a port C of the second electromagnetic directional valve 7 and a port C of the third electromagnetic directional valve 8 are connected with a second load oil path 10; a port D of the second electromagnetic directional valve 7 and a port D of the third electromagnetic directional valve 8 are connected to a first load oil passage 9.
The control power supply high voltage L is connected with the end A of the relay contactor 11, the end A of the normally-open proximity switch 5 and the end E of the relay contactor 11; the terminal B of the relay contactor 11 and the terminal B of the normally-open type proximity switch 5 are connected with the terminal A of the normally-closed type proximity switch 6; the end B of the normally closed proximity switch 6 is connected with the end C of the relay contactor 11; the end F of the relay contactor 11 is connected with the end EX of the first electromagnetic reversing valve 3, the end EX of the second electromagnetic reversing valve 7 and the end EX of the third electromagnetic reversing valve 8; the end D of the relay contactor 11, the end EY of the first electromagnetic directional valve 3, the end EY of the second electromagnetic directional valve 7 and the end EY of the third electromagnetic directional valve 8 are connected with a control power supply ground wire N.
The specific control process is as follows:
the four-chamber hydraulic cylinder 4 is provided with a coaxial piston rod, and the two ends of the piston rod are respectively a 4 alpha end and a 4 beta end; when the 4 alpha end of the four-chamber hydraulic cylinder 4 is not in contact with the normally-open type proximity switch 5 and the 4 beta end of the four-chamber hydraulic cylinder 4 is not in contact with the normally-closed type proximity switch 6, the hydraulic circuit is powered on, the electrical circuit is powered on, in the electrical control circuit b, the normally-open type proximity switch 5 is in an initial off state, the normally-closed type proximity switch 6 is in an initial on state, the high voltage L of the control power supply is disconnected with the A end of the normally-closed type proximity switch 6, no potential difference exists between the C end and the D end of the relay contactor 11, the relay contactor 11 is powered off, and the E end and the F end of the relay contactor are disconnected; the high voltage L of the control power supply is disconnected with the end EX of the first electromagnetic reversing valve 3, no potential difference exists between the end EX of the first electromagnetic reversing valve 3 and the end EY, the electromagnetic coil E of the first electromagnetic reversing valve 3 is powered off, and the first electromagnetic reversing valve 3 is kept at the left position; the high voltage L of the control power supply is disconnected with the end EX of the second electromagnetic reversing valve 7, no potential difference exists between the end EX of the second electromagnetic reversing valve 7 and the end EY, the electromagnetic coil E of the second electromagnetic reversing valve 7 is powered off, and the second electromagnetic reversing valve 7 is kept in the left position; the high voltage L of the control power supply is disconnected with the end EX of the third electromagnetic reversing valve 8, no potential difference exists between the end EX of the third electromagnetic reversing valve 8 and the end EY, the electromagnetic coil E of the third electromagnetic reversing valve 8 is powered off, and the third electromagnetic reversing valve 8 is kept in the left position; in the hydraulic control loop a, hydraulic oil in a hydraulic oil source 1 enters an A port of a first electromagnetic directional valve 3, the first electromagnetic directional valve 3 is positioned at the left position, the hydraulic oil flows out through a C port of the first electromagnetic directional valve 3 and respectively enters a first hydraulic oil cavity 401 and a third hydraulic oil cavity 403, and coaxial piston rods of four-cavity hydraulic cylinders 4 move rightwards under the action of the hydraulic oil; the hydraulic oil in the second hydraulic oil chamber 402 enters the port a of the third electromagnetic directional valve 8 from the outlet thereof, the third electromagnetic directional valve 8 is located at the left position, and the hydraulic oil passes through the third electromagnetic directional valve 8, flows out from the port C of the third electromagnetic directional valve 8, and enters the second load oil path 10; the hydraulic oil in the fourth hydraulic oil chamber 404 enters the port B of the third electromagnetic directional valve 8 through the outlet thereof, the third electromagnetic directional valve 8 is located at the left position, and the hydraulic oil passes through the third electromagnetic directional valve 8, flows out from the port D of the third electromagnetic directional valve 8, and enters the first load oil path 9; since the second hydraulic oil chamber 402 and the fourth hydraulic oil chamber 404 have the same cylinder bore and piston rod outside diameter and the moving speeds thereof are the same, the flow rates of the first load oil passage 9 and the second load oil passage 10 are synchronized.
When the four-chamber hydraulic cylinder 4 runs to the right position, the 4 alpha end of the coaxial piston rod is in contact with the normally-open type proximity switch 5 to communicate the A end and the B end of the normally-open type proximity switch 5, and at the moment, the 4 beta end of the coaxial piston rod and the normally-closed type proximity switch 6 are in a non-contact state; the hydraulic circuit is electrified, the electric circuit is electrified, and in the electric control circuit b, the normally open type proximity switch 5 is in an on state, and the normally closed type proximity switch 6 is in an initial on state; the high voltage L of the control power supply is communicated with the end A of the normally closed proximity switch 6, the end C and the end D of the relay contactor 11 have potential difference, the relay contactor 11 is electrified and communicated with the end E and the end F of the relay contactor 11; the high voltage L of the control power supply, the EX end of the first electromagnetic reversing valve 3, the EX end of the second electromagnetic reversing valve 7 and the EX end of the third electromagnetic reversing valve 8 are communicated; a potential difference exists between the end EX of the first electromagnetic reversing valve 3 and the end EY, and an electromagnetic coil E of the first electromagnetic reversing valve 3 is electrified, so that the first electromagnetic reversing valve 3 is positioned at the right position; a potential difference exists between the end EX of the second electromagnetic directional valve 7 and the end EY, and an electromagnetic coil E of the second electromagnetic directional valve 7 is electrified, so that the second electromagnetic directional valve 7 is positioned at the right position; a potential difference exists between the end EX of the third electromagnetic directional valve 8 and the end EY, and an electromagnetic coil E of the third electromagnetic directional valve 8 is electrified, so that the third electromagnetic directional valve 8 is positioned at the right position; in the hydraulic control loop a, a hydraulic oil source 1 enters an A port of a first electromagnetic directional valve), the first electromagnetic directional valve 3 is positioned at the right position, hydraulic oil passes through the first electromagnetic directional valve 3, flows out of a D port of the first electromagnetic directional valve 3, respectively enters a second hydraulic oil cavity 402 and a fourth hydraulic oil cavity 404, and a coaxial piston rod moves leftwards under the action of the hydraulic oil; the hydraulic oil in the first hydraulic oil chamber 401 enters the port a of the second electromagnetic directional valve 7 through the outlet thereof, the second electromagnetic directional valve 7 is positioned at the right position, and the hydraulic oil passes through the second electromagnetic directional valve 7, flows out of the port C of the second electromagnetic directional valve 7 and enters the second load oil path 10; the hydraulic oil in the third hydraulic oil chamber 403 enters the port B of the second electromagnetic directional valve 7 through the outlet thereof, the second electromagnetic directional valve 7 is located at the right position, and the hydraulic oil passes through the second electromagnetic directional valve 7, flows out of the port D of the second electromagnetic directional valve 7, and enters the first load oil path 9; since the first hydraulic oil chamber 401 and the third hydraulic oil chamber 403 have the same cylinder bore and piston rod outside diameter and the moving speeds thereof are the same, the flow rates of the first load oil passage 9 and the second load oil passage 10 are synchronized.
When the four-chamber hydraulic cylinder 4 runs leftwards and leaves the right position, the 4 alpha end of the coaxial piston rod is disconnected with the normally-open type proximity switch 5, and the 4 beta end of the coaxial piston rod is in a non-contact state with the normally-closed type proximity switch 6; in the electrical control circuit b, the normally open type proximity switch 5 is in an off state, and the normally closed type proximity switch 6 is in an initial on state; the end A and the end B of the relay contactor 11 are communicated, the control power supply high voltage L is communicated with the end A of the normally closed proximity switch 6, the end C and the end D of the relay contactor 11 have potential difference, the relay contactor 11 is electrified, and the communication state between the end E and the end F of the relay contactor is maintained; the high voltage L of the control power supply, the EX end of the first electromagnetic reversing valve 3, the EX end of the second electromagnetic reversing valve 7 and the EX end of the third electromagnetic reversing valve 8 are communicated; a potential difference exists between the end EX of the first electromagnetic directional valve 3 and the end EY, and an electromagnetic coil E of the first electromagnetic directional valve 3 is kept electrified, so that the first electromagnetic directional valve 3 is positioned at the right position; a potential difference exists between the end EX of the second electromagnetic directional valve 7 and the end EY, and an electromagnetic coil E of the second electromagnetic directional valve 7 is kept electrified, so that the second electromagnetic directional valve 7 is positioned at the right position; a potential difference exists between the end EX of the third electromagnetic directional valve 8 and the end EY, and an electromagnetic coil E of the third electromagnetic directional valve 8 is kept electrified, so that the third electromagnetic directional valve 8 is positioned at the right position; in the hydraulic control loop a, hydraulic oil enters the port A of the first electromagnetic directional valve 3, the first electromagnetic directional valve 3 is positioned at the right position, and the hydraulic oil passes through the first electromagnetic directional valve 3 and flows out of the port D of the first electromagnetic directional valve 3; hydraulic oil respectively enters the second hydraulic oil cavity 402 and the fourth hydraulic oil cavity 404, and the coaxial piston rod moves leftwards under the action of the hydraulic oil; the hydraulic oil in the first hydraulic oil chamber 401 enters the port a of the second electromagnetic directional valve 7 through the outlet thereof, the second electromagnetic directional valve 7 is positioned at the right position, and the hydraulic oil passes through the second electromagnetic directional valve 7, flows out of the port C of the second electromagnetic directional valve 7 and enters the second load oil path 10; the hydraulic oil in the third hydraulic oil chamber 403 enters the port B of the second electromagnetic directional valve 7 through the outlet thereof, the second electromagnetic directional valve 7 is located at the right position, and the hydraulic oil passes through the second electromagnetic directional valve 7, flows out from the port D of the second electromagnetic directional valve 7, and enters the first load oil path 9; since the first hydraulic oil chamber 401 and the third hydraulic oil chamber 403 have the same cylinder bore and piston rod outside diameter and the moving speeds thereof are the same, the flow rates of the first load oil passage 9 and the second load oil passage 10 are synchronized.
When the four-chamber hydraulic cylinder 4 runs to the left, the 4 alpha end of the coaxial piston rod and the normally-open type proximity switch 5 are in a disconnected state, the 4 beta end of the coaxial piston rod is in contact with the normally-closed type proximity switch 6, the A end and the B end of the normally-closed type proximity switch 6 are disconnected, the hydraulic circuit is electrified, the electric circuit is electrified, in the electric control circuit B, the normally-open type proximity switch 5 is in an initial disconnected state, and the normally-closed type proximity switch 6 is in a disconnected state; the high voltage L of the power supply is controlled to be disconnected with the end A of the normally closed proximity switch 6, no potential difference exists between the end C and the end D of the relay contactor 11, the relay contactor 11 is powered off, and the end E and the end F of the relay contactor 11 are disconnected; the high voltage L of the control power supply is disconnected with the end EX of the first electromagnetic reversing valve 3, no potential difference exists between the end EX of the first electromagnetic reversing valve 3 and the end EY, the electromagnetic coil E of the first electromagnetic reversing valve 3 is powered off, and the first electromagnetic reversing valve 3 is located at the left position; the high voltage L of the control power supply is disconnected with the end EX of the second electromagnetic reversing valve 7, no potential difference exists between the end EX of the second electromagnetic reversing valve 7 and the end EY, and the electromagnetic coil E of the second electromagnetic reversing valve 7 is powered off, so that the second electromagnetic reversing valve 7 is positioned at the left position; the high voltage L of the control power supply is disconnected with the end EX of the third electromagnetic reversing valve 8, no potential difference exists between the end EX of the third electromagnetic reversing valve 8 and the end EY, and the electromagnetic coil E of the third electromagnetic reversing valve 8 is powered off, so that the third electromagnetic reversing valve 8 is positioned at the left position; in the hydraulic control loop a, hydraulic oil enters the port A of the first electromagnetic directional valve 3, the first electromagnetic directional valve 3 is positioned at the left position, the hydraulic oil passes through the first electromagnetic directional valve 3, flows out of the port C of the first electromagnetic directional valve 3, respectively enters the first hydraulic oil cavity 401 and the third hydraulic oil cavity 403, and the coaxial piston rod moves to the right under the action of the hydraulic oil; the hydraulic oil in the second hydraulic oil chamber 402 enters the port a of the third electromagnetic directional valve 8 through the outlet thereof, the third electromagnetic directional valve 8 is located at the left position, and the hydraulic oil flows out of the port C of the third electromagnetic directional valve 8 through the third electromagnetic directional valve 8 and enters the second load oil path 10; the hydraulic oil in the fourth hydraulic oil chamber 404 enters the port B of the third electromagnetic directional valve 8 through the outlet thereof, the third electromagnetic directional valve 8 is located at the left position, and the hydraulic oil passes through the third electromagnetic directional valve 8, flows out from the port D of the third electromagnetic directional valve 8, and enters the first load oil passage 9; since the second hydraulic oil chamber 402 and the fourth hydraulic oil chamber 404 have the same cylinder bore and piston rod outside diameter and the moving speeds thereof are the same, the flow rates of the first load oil passage 9 and the second load oil passage 10 are synchronized.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A hydraulic synchronous control system characterized by: the hydraulic control system comprises a hydraulic control loop and an electric control loop, wherein the hydraulic control loop comprises a hydraulic oil source, a first load oil path, a second load oil path and a four-chamber hydraulic cylinder; the four-chamber hydraulic cylinder comprises four cylinder barrels with the same inner diameter, namely a first hydraulic oil chamber, a second hydraulic oil chamber, a third hydraulic oil chamber and a fourth hydraulic oil chamber, wherein the first hydraulic oil chamber is connected with an inlet of the third hydraulic oil chamber, and the second hydraulic oil chamber is connected with an inlet of the fourth hydraulic oil chamber; coaxial piston rods are arranged in the four-cavity hydraulic cylinder; the electric control loop comprises a first electromagnetic directional valve, a second electromagnetic directional valve, a third electromagnetic directional valve, a normally open type proximity switch, a normally closed type proximity switch and a relay contactor; the hydraulic oil source is connected with the inlet of the four-chamber hydraulic cylinder through the first electromagnetic directional valve; outlets of the first hydraulic oil cavity and the third hydraulic oil cavity are respectively connected with the first load oil way and the second load oil way through a second electromagnetic reversing valve; outlets of the second hydraulic oil cavity and the fourth hydraulic oil cavity are respectively connected with the first load oil way and the second load oil way through a third electromagnetic reversing valve; the normally open type proximity switch and the normally closed type proximity switch are respectively connected with the relay contactor; the first electromagnetic reversing valve, the second electromagnetic reversing valve and the third electromagnetic reversing valve are two-position four-way electromagnetic reversing valves; the hydraulic oil source enters from an opening A of the first electromagnetic reversing valve, is connected with the first hydraulic oil cavity and the third hydraulic oil cavity through an opening C, and is connected with the second hydraulic oil cavity and the fourth hydraulic oil cavity through an opening D; the outlet of the first hydraulic oil cavity is connected with the port A of the second electromagnetic reversing valve, the outlet of the third hydraulic oil cavity is connected with the port B of the second electromagnetic reversing valve, the outlet of the second hydraulic oil cavity is connected with the port A of the third electromagnetic reversing valve, and the outlet of the fourth hydraulic oil cavity is connected with the port B of the third electromagnetic reversing valve; the port C of the second electromagnetic directional valve and the port C of the third electromagnetic directional valve are connected with a second load oil way; and the port D of the second electromagnetic directional valve and the port D of the third electromagnetic directional valve are connected with a first load oil way.
2. The hydraulic synchronous control system of claim 1, wherein: the end A of the relay contactor, the end A of the normally-open proximity switch and the end E of the relay contactor are connected with a control power supply high voltage L; the terminal B of the relay contactor and the terminal B of the normally-open type proximity switch are connected with the terminal A of the normally-closed type proximity switch; the end B of the normally closed proximity switch is connected with the end C of the relay contactor; the end F of the relay contactor is connected with the end EX of the first electromagnetic reversing valve, the end EX of the second electromagnetic reversing valve and the end EX of the third electromagnetic reversing valve; and the D end of the relay contactor, the EY end of the first electromagnetic reversing valve, the EY end of the second electromagnetic reversing valve and the EY end of the third electromagnetic reversing valve are connected with a control power supply ground wire N.
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| CN201910830514.2A CN110725820B (en) | 2019-09-04 | 2019-09-04 | Hydraulic synchronous control system |
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| CN201910830514.2A CN110725820B (en) | 2019-09-04 | 2019-09-04 | Hydraulic synchronous control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104192A (en) * | 1985-06-01 | 1986-11-26 | 诺斯阀门公司 | Upright arrangement lift valves |
| CN1056664A (en) * | 1990-05-21 | 1991-12-04 | 刘玉震 | Copper liquid energy recovering device for nitrogenous fertilizer producing |
| CN102116326A (en) * | 2011-02-23 | 2011-07-06 | 周建新 | Hydraulic push-pull synchronization method and device thereof |
| CN102619796A (en) * | 2012-03-31 | 2012-08-01 | 徐州铭硕机械科技有限公司 | Synchronous opening/closing driving device for doors of large-sized weighing hopper |
| CN103836013A (en) * | 2014-02-26 | 2014-06-04 | 长治市永华机械有限公司 | Automatic variant reversing mechanism |
-
2019
- 2019-09-04 CN CN201910830514.2A patent/CN110725820B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104192A (en) * | 1985-06-01 | 1986-11-26 | 诺斯阀门公司 | Upright arrangement lift valves |
| CN1056664A (en) * | 1990-05-21 | 1991-12-04 | 刘玉震 | Copper liquid energy recovering device for nitrogenous fertilizer producing |
| CN102116326A (en) * | 2011-02-23 | 2011-07-06 | 周建新 | Hydraulic push-pull synchronization method and device thereof |
| CN102619796A (en) * | 2012-03-31 | 2012-08-01 | 徐州铭硕机械科技有限公司 | Synchronous opening/closing driving device for doors of large-sized weighing hopper |
| CN103836013A (en) * | 2014-02-26 | 2014-06-04 | 长治市永华机械有限公司 | Automatic variant reversing mechanism |
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