CN115823042A - Synchronous oil cylinder control loop - Google Patents
Synchronous oil cylinder control loop Download PDFInfo
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- CN115823042A CN115823042A CN202211415966.2A CN202211415966A CN115823042A CN 115823042 A CN115823042 A CN 115823042A CN 202211415966 A CN202211415966 A CN 202211415966A CN 115823042 A CN115823042 A CN 115823042A
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Abstract
The invention discloses a synchronous oil cylinder control loop which comprises an oil tank, a main pump, a first oil cylinder, a second oil cylinder, a first reversing valve, a second reversing valve and a third reversing valve, wherein an oil inlet of the main pump is connected with the oil tank; a first working oil port and a second working oil port of the second reversing valve are respectively connected with a rodless cavity and a rod cavity of the second oil cylinder; a first working oil port of the third reversing valve is connected with a rodless cavity of the first oil cylinder, and a second working oil port of the third reversing valve is connected with a rodless cavity of the second oil cylinder; the rod cavities of the first oil cylinder and the second oil cylinder are connected. The invention provides a novel synchronous oil cylinder control loop design which is simple and can control the action of each oil cylinder independently and control the oil cylinders to act synchronously.
Description
Technical Field
The invention discloses a synchronous oil cylinder control loop, and relates to the technical field of engineering equipment control.
Background
As the application of hydraulic technology becomes more and more extensive, the requirements on hydraulic technology also become more and more. The synchronous application scenes of the hydraulic oil cylinders are more and more, and because the flow of a general hydraulic system is greatly influenced by external load change and other factors, the single-pump multi-hydraulic oil cylinder system is difficult to ensure that the flow entering each hydraulic oil cylinder is the same, and further the synchronous operation of the multiple hydraulic oil cylinders is difficult to ensure;
in the prior art, the synchronous action of two oil cylinders is controlled by one three-position four-way electromagnetic valve, the work of a single oil cylinder cannot be controlled independently, and the control form is single.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a synchronous oil cylinder control loop, which realizes independent and synchronous control of two oil cylinders and has various control forms.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a synchronous oil cylinder control loop comprises an oil tank, a main pump, a first oil cylinder, a second oil cylinder, a first reversing valve, a second reversing valve and a third reversing valve,
an oil inlet of a main pump is connected with an oil tank, an oil outlet of the main pump is respectively connected with main oil inlets of a first reversing valve, a second reversing valve and a third reversing valve, main oil return ports of the first reversing valve, the second reversing valve and the third reversing valve are connected with the oil tank,
the first working oil port and the second working oil port of the first reversing valve are respectively connected with the rodless cavity and the rod cavity of the first oil cylinder;
a first working oil port and a second working oil port of the second reversing valve are respectively connected with a rodless cavity and a rod cavity of the second oil cylinder;
a first working oil port of the third reversing valve is connected with a rodless cavity of the first oil cylinder, and a second working oil port of the third reversing valve is connected with a rodless cavity of the second oil cylinder;
the rod cavities of the first oil cylinder and the second oil cylinder are connected.
Furthermore, the first reversing valve, the second reversing valve and the third reversing valve are all three-position four-way reversing valves.
Furthermore, the middle position function of the three-position four-way reversing valve is in an O shape.
Furthermore, an overflow valve is connected between an oil outlet of the main pump and the oil tank.
Furthermore, the first reversing valve controls the first oil cylinder to act, when the first reversing valve is in a left position, hydraulic oil enters a rodless cavity of the first oil cylinder through the main pump, and a piston rod of the first oil cylinder extends out.
Furthermore, the first reversing valve controls the first oil cylinder to act, when the first reversing valve is in the right position, hydraulic oil enters a rod cavity of the first oil cylinder through the main pump, and a piston rod of the first oil cylinder retracts.
Furthermore, a second reversing valve controls the second oil cylinder to act, when the second reversing valve is in a left position, hydraulic oil enters a rodless cavity of the second oil cylinder through a main pump, and a piston rod of the second oil cylinder extends out.
Furthermore, a second reversing valve controls the second oil cylinder to act, when the second reversing valve is in a right position, hydraulic oil enters a rod cavity of the second oil cylinder through a main pump, and a piston rod of the second oil cylinder retracts.
Furthermore, a third reversing valve controls the synchronous action of the first oil cylinder and the second oil cylinder, when the third reversing valve is in a left position, a piston rod of the first oil cylinder extends out, and a piston rod of the second oil cylinder retracts; when the third reversing valve is in the right position, the piston rod of the second oil cylinder extends out, and meanwhile, the piston rod of the first oil cylinder retracts.
Has the beneficial effects that: the invention provides a new loop design for the synchronous action of the oil cylinders of the hydraulic system, the loop design is simple, the control is accurate, and the invention can not only independently control the action of each oil cylinder, but also control the synchronous action of the oil cylinders.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In one embodiment shown in fig. 1, a synchronous cylinder control circuit comprises an oil tank 1, a main pump 2, a first cylinder 3, a second cylinder 4, a first direction valve 5, a second direction valve 6 and a third direction valve 7,
an oil inlet of a main pump 2 is connected with an oil tank 1, an oil outlet of the main pump 2 is respectively connected with main oil inlets of three reversing valves, main oil return ports of the three reversing valves are connected with the oil tank 1,
a first working oil port of the first reversing valve 5 is connected with a rodless cavity of the first oil cylinder 3, and a second working oil port of the first reversing valve 5 is connected with a rod cavity of the first oil cylinder 3;
a first working oil port of the second reversing valve 6 is connected with a rodless cavity of the second oil cylinder 4, and a second working oil port of the second reversing valve 6 is connected with a rod cavity of the second oil cylinder 4;
a first working oil port of the third reversing valve 7 is connected with a rodless cavity of the first oil cylinder 3, and a second working oil port of the third reversing valve is connected with a rodless cavity of the second oil cylinder 4;
the rod cavities of the first oil cylinder 3 and the second oil cylinder 4 are connected through a pipeline.
The first reversing valve 5, the second reversing valve 6 and the third reversing valve 7 are three-position four-way reversing valves, and the middle position of each three-position four-way reversing valve can be in an O shape; an overflow valve is connected between the oil outlet of the main pump and the oil tank;
the first reversing valve 5 and the second reversing valve 6 cannot be simultaneously electrified; the third direction valve 7 cannot be energized simultaneously with the first direction valve 5 or the second direction valve 6.
The first oil cylinder acts independently:
the first oil cylinder 3 is controlled to move through the first reversing valve 5, when a left electromagnet DT1 of the first reversing valve 5 is electrified, the first reversing valve 5 is in a left position, a main oil inlet-P port of the first reversing valve 5 is communicated with a first working oil port-A port, a main oil return port-T port is communicated with a second working oil port-B port, hydraulic oil enters a rodless cavity of the first oil cylinder 3 under the driving of a main pump 2, a piston rod of the first oil cylinder 3 extends out, and the hydraulic oil in the rod cavity of the first oil cylinder 3 returns to the oil tank 1;
when the right electromagnet DT2 of the first reversing valve 5 is electrified, the first reversing valve 5 is in the right position, a main oil inlet-P port of the first reversing valve 5 is communicated with a second working oil port-B port, a main oil return port-T port is communicated with a first working oil port-A port, hydraulic oil enters a rod cavity of the first oil cylinder 3 under the driving of the main pump 2, a piston rod of the first oil cylinder 3 retracts, and hydraulic oil in a rodless cavity of the first oil cylinder 3 returns to the oil tank 1;
the second oil cylinder acts independently:
the second oil cylinder 4 is controlled to move through the second reversing valve 6, when a left electromagnet DT5 of the second reversing valve 6 is electrified, the second reversing valve 6 is in a left position, a main oil inlet-P port of the second reversing valve 6 is communicated with a first working oil port-A port, a main oil return port-T port is communicated with a second working oil port-B port, hydraulic oil enters a rodless cavity of the second oil cylinder 4 under the driving of the main pump 2, a piston rod of the second oil cylinder 4 extends out, and the hydraulic oil in the rod cavity of the second oil cylinder 4 returns to the oil tank 1;
when the right electromagnet DT6 of the second reversing valve 6 is electrified, the second reversing valve 6 is in the right position, a main oil inlet-P port of the second reversing valve 6 is communicated with a second working oil port-B port, a main oil return port-T port is communicated with a first working oil port-A port, hydraulic oil enters a rod cavity of the second oil cylinder 4 under the driving of the main pump 2, a piston rod of the second oil cylinder 4 retracts, and hydraulic oil in a rodless cavity of the second oil cylinder 4 returns to an oil tank;
the first oil cylinder and the second oil cylinder synchronously act:
the first oil cylinder 3 and the second oil cylinder 4 are controlled to synchronously act through the third reversing valve 7, when a left electromagnet DT3 of the third reversing valve 7 is electrified, the third reversing valve 7 is in a left position, a main oil inlet-P port of the third reversing valve 7 is communicated with a first working oil port-A port, a main oil return port-T port is communicated with a second working oil port-B port, hydraulic oil enters a rodless cavity of the first oil cylinder 3 under the driving of the main pump 2, a piston rod of the first oil cylinder 3 extends out, meanwhile, hydraulic oil in a rod cavity of the first oil cylinder 3 enters a rod cavity of the second oil cylinder 4, the piston rod of the second oil cylinder 4 retracts, and hydraulic oil in the rodless cavity of the second oil cylinder 4 returns to the oil tank 1;
when the left electromagnet DT4 of the third reversing valve 7 is energized, the third reversing valve 7 is in the right position, the main oil inlet-P port of the third reversing valve 7 is communicated with the second working oil port-B port, the main oil return port-T port is communicated with the first working oil port-A port, hydraulic oil enters the rodless cavity of the second oil cylinder 4 under the driving of the main pump 2, the piston rod of the second oil cylinder 4 extends out, meanwhile, the hydraulic oil in the rod cavity of the second oil cylinder 4 enters the rod cavity of the first oil cylinder 3, the piston rod of the first oil cylinder 3 retracts, and the hydraulic pressure in the rodless cavity of the first oil cylinder 3 returns to the oil tank 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A synchronous oil cylinder control loop is characterized by comprising an oil tank (1), a main pump (2), a first oil cylinder (3), a second oil cylinder (4), a first reversing valve (5), a second reversing valve (6) and a third reversing valve (7),
an oil inlet of a main pump (2) is connected with an oil tank (1), an oil outlet of the main pump (2) is respectively connected with main oil inlets of a first reversing valve (5), a second reversing valve (6) and a third reversing valve (7), main oil return ports of the first reversing valve (5), the second reversing valve (6) and the third reversing valve (7) are connected with the oil tank (1),
a first working oil port and a second working oil port of the first reversing valve (5) are respectively connected with a rodless cavity and a rod cavity of the first oil cylinder (3);
a first working oil port and a second working oil port of the second reversing valve (6) are respectively connected with a rodless cavity and a rod cavity of the second oil cylinder (4);
a first working oil port of the third reversing valve (7) is connected with a rodless cavity of the first oil cylinder (3), and a second working oil port of the third reversing valve is connected with a rodless cavity of the second oil cylinder (4);
the rod cavities of the first oil cylinder (3) and the second oil cylinder (4) are connected.
2. The synchronous oil cylinder control circuit according to claim 1, wherein the first change valve (5), the second change valve (6) and the third change valve (7) are three-position four-way change valves.
3. The control circuit of claim 2, wherein the neutral position of the three-position, four-way reversing valve is O-shaped.
4. A control circuit for a synchronous cylinder according to claim 1, characterized in that an overflow valve (8) is connected between the oil outlet of the main pump (2) and the oil tank (1).
5. A control circuit for a synchronous cylinder according to claim 3, characterized in that the first direction valve (5) controls the first cylinder (3) to move, when the first direction valve (5) is in the left position, the hydraulic oil enters the rodless chamber of the first cylinder (3) through the main pump (2), and the piston rod of the first cylinder (3) extends.
6. A control circuit for a synchronous cylinder according to claim 3, characterized in that the first direction valve (5) controls the first cylinder (3) to move, and when the first direction valve (5) is in the right position, hydraulic oil enters the rod chamber of the first cylinder (3) through the main pump (2), and the piston rod of the first cylinder (3) retracts.
7. A control circuit for a synchronous cylinder according to claim 3, characterized in that the second direction-changing valve (6) controls the second cylinder (4) to move, when the second direction-changing valve (6) is in the left position, the hydraulic oil enters the rodless chamber of the second cylinder (4) through the main pump (2), and the piston rod of the second cylinder (4) extends.
8. A control circuit for a synchronous cylinder according to claim 3, characterized in that the second direction-changing valve (6) controls the second cylinder (4) to move, and when the second direction-changing valve (6) is in the right position, hydraulic oil enters the rod chamber of the second cylinder (4) through the main pump (2), and the piston rod of the second cylinder (4) retracts.
9. A synchronous cylinder control circuit according to claim 3, characterized in that the third directional control valve (7) controls the synchronous action of the first cylinder (3) and the second cylinder (4), when the third directional control valve (7) is in the left position, the piston rod of the first cylinder (3) extends, and the piston rod of the second cylinder (4) retracts; when the third reversing valve (7) is in the right position, the piston rod of the second oil cylinder (4) extends out, and meanwhile, the piston rod of the first oil cylinder (3) retracts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415966.2A CN115823042A (en) | 2022-11-11 | 2022-11-11 | Synchronous oil cylinder control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415966.2A CN115823042A (en) | 2022-11-11 | 2022-11-11 | Synchronous oil cylinder control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115823042A true CN115823042A (en) | 2023-03-21 |
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ID=85527849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211415966.2A Pending CN115823042A (en) | 2022-11-11 | 2022-11-11 | Synchronous oil cylinder control loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115823042A (en) |
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2022
- 2022-11-11 CN CN202211415966.2A patent/CN115823042A/en active Pending
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