CN210113400U - Sequential control hydraulic system - Google Patents
Sequential control hydraulic system Download PDFInfo
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- CN210113400U CN210113400U CN201920531109.6U CN201920531109U CN210113400U CN 210113400 U CN210113400 U CN 210113400U CN 201920531109 U CN201920531109 U CN 201920531109U CN 210113400 U CN210113400 U CN 210113400U
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Abstract
The utility model discloses a sequence control hydraulic system, which comprises a plurality of working oil cylinder subsystems, wherein each working oil cylinder subsystem comprises an oil cylinder and an oil supply device, a rodless cavity of the oil cylinder is connected with the oil supply device through a first oil supply pipe, and a rod cavity of the oil cylinder is connected with the oil supply device through a second oil supply pipe; and a flow sensor is arranged on the first oil supply pipe or the second oil supply pipe of each working oil cylinder subsystem. Adopt the utility model discloses a hydraulic system controls opening and close of working cylinder subsystem through getting lost of flow sensor signal, does not receive system pressure impact's influence, and control is simple and convenient, and is accurate errorless, and flow sensor can concatenate the arbitrary position on first confession oil pipe or second confession oil pipe, and the installation is simple and convenient, does not receive the restriction of motion structure, and is simple and convenient.
Description
Technical Field
The utility model relates to a hydraulic system's control technical field, in particular to sequence control hydraulic system.
Background
When a plurality of oil cylinders of the hydraulic system need sequential control action, sequential action loops are divided into two categories of pressure control and stroke control according to different control modes. The pressure control is realized through a sequence valve, the sequence valve is connected with an oil circuit of a rear action oil cylinder in series, when a priority action oil cylinder moves to a terminal point, the pressure of a system rises, the oil circuit of the rear action oil cylinder is communicated when the pressure set value of the sequence valve is reached, the rear action oil cylinder moves, the control of the sequence valve is easily interfered by the pressure, particularly, in a throttling debugging system, a throttle valve needs to be connected in series when the priority action oil cylinder needs to adjust the movement speed, the pressure of a loop is close to the set pressure of the system, therefore, the setting of the sequence valve is very close to the working pressure of the loop of the priority action oil cylinder, the sequence valve is opened when the system slightly impacts, and the. The stroke control is that a stroke switch or a position sensor is arranged on a moving structure, a priority action oil cylinder moves firstly, the stroke switch or the position sensor is touched, a circuit of a reversing valve of a rear action oil cylinder is connected, the rear action oil cylinder moves, the stroke control can accurately judge the position of the oil cylinder, the sequence action is reliable, but the stroke control is limited by the structure of a mechanism, and some mechanisms are inconvenient to install the stroke switch or the position sensor.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sequential control hydraulic system to overcome sequential control hydraulic system and adopt pressure control's sequence valve easily to receive pressure interference and maloperation, and adopt the stroke control easily to receive the shortcoming of the restriction of motion structure.
In order to achieve the above object, the present invention provides a sequential control hydraulic system, which comprises a plurality of working cylinder subsystems, each of the working cylinder subsystems comprises a cylinder and an oil supply device, a rodless cavity of the cylinder is connected with the oil supply device through a first oil supply pipe, and a rod cavity of the cylinder is connected with the oil supply device through a second oil supply pipe; and a flow sensor is arranged on the first oil supply pipe or the second oil supply pipe of each working oil cylinder subsystem.
Preferably, in the above technical scheme, the oil supply device includes a directional control valve, an oil inlet P of the directional control valve is communicated with the oil inlet path, an oil return port T of the directional control valve is communicated with the oil return path, the first oil supply pipe of the oil cylinder is communicated with a working oil port a of the directional control valve, and the second oil supply pipe of the oil cylinder is communicated with a working oil port B of the directional control valve; the reversing valve can realize switching of the communication relation between the first oil supply pipe and the oil inlet oil way and switching of the communication relation between the second oil supply pipe and the oil inlet oil way and the oil return oil way, and in a normal state, the reversing valve disconnects the first oil supply pipe and the second oil supply pipe from the oil inlet oil way and the oil return oil way.
Preferably, in the above technical solution, the direction changing valve is an electromagnetic direction changing valve.
Preferably, in the above technical scheme, each working cylinder subsystem further includes a speed regulating valve, and the first oil supply pipe and/or the second oil supply pipe is provided with one speed regulating valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a hydraulic system includes a plurality of working cylinder subsystems, and all working cylinder subsystems can start according to the order, and every working cylinder subsystem includes hydro-cylinder and oil supply unit, and is provided with a flow sensor on the first oil supply pipe or the second oil supply pipe of every working cylinder subsystem, and flow sensor can detect the hydraulic oil flow signal of the interior oil circuit of corresponding working cylinder subsystem; when a previous working oil cylinder subsystem is started, a piston rod of a corresponding oil cylinder is driven to extend or contract, a corresponding flow sensor can detect a hydraulic oil flowing signal in an oil way, when the oil cylinder extends or contracts to a limit position, hydraulic oil in the oil way does not flow any more, the corresponding flow sensor loses the hydraulic oil flowing signal, namely when the flow sensor of the previous working oil cylinder subsystem loses the hydraulic oil flowing signal, the next working oil cylinder subsystem is controlled to be started, the previous working oil cylinder subsystem is closed, and the process is circulated; the opening and closing of the working oil cylinder subsystem are controlled by the gain and loss of the flow sensor signals, the system is not influenced by system pressure impact, the control is simple and convenient, the accuracy is high, the flow sensor can be connected to any position on the first oil supply pipe or the second oil supply pipe in series, the installation is simple and convenient, and the limitation of a movement mechanism structure is avoided.
2. The utility model discloses an oil supply unit includes the switching-over valve, controls the start-up and close of corresponding work hydro-cylinder subsystem through the switching-over valve, and is simple and convenient, and the switching-over valve is the electromagnetic directional valve, controls the start-up and close of corresponding work hydro-cylinder subsystem through getting electric and losing electricity of electromagnetic directional valve, is convenient for it and controller carry out connection control, improves hydraulic system's degree of automation.
3. The utility model discloses an every working cylinder subsystem still includes the governing valve, and first oil feed pipe and/or second oil feed pipe are provided with the governing valve, are convenient for adjust the hydro-cylinder velocity of motion.
Drawings
Fig. 1 is a schematic diagram of a connection structure of a sequence control hydraulic system according to the present invention.
Description of the main reference numerals:
the device comprises an oil cylinder 1, a flow sensor 2, a first oil supply pipe 3, a second oil supply pipe 4, a speed regulating valve 5, an electromagnetic directional valve 6, a first electromagnet 6-1, a second electromagnet 6-2, an oil inlet path 7 and an oil return path 8.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 shows a schematic structural diagram of a sequential control hydraulic system according to a preferred embodiment of the present invention, which includes a plurality of working cylinder subsystems. Referring to fig. 1, each working cylinder subsystem includes a cylinder 1 and an oil supply device, a rodless cavity of the cylinder 1 is connected to the oil supply device through a first oil supply pipe 3, and a rod cavity of the cylinder 1 is connected to the oil supply device through a second oil supply pipe 4, so that the oil supply device can supply oil to the rodless cavity or the rod cavity of the cylinder 1, respectively, to drive a piston rod of the cylinder 1 to extend or contract, and a flow sensor 2 is disposed on the first oil supply pipe 3 or the second oil supply pipe 4 of each working cylinder subsystem to detect a hydraulic oil flow signal in the first oil supply pipe 3 or the second oil supply pipe 4. The utility model discloses a hydraulic system includes a plurality of working cylinder subsystems, and all working cylinder subsystems can start according to the order, and every working cylinder subsystem includes hydro-cylinder 1 and oil supply unit, and is provided with a flow sensor 2 on the first oil supply pipe 3 or the second oil supply pipe 4 of every working cylinder subsystem, and flow sensor 2 can detect the hydraulic oil flow signal of the interior oil circuit of corresponding working cylinder subsystem; when a previous working oil cylinder subsystem is started, a piston rod of a corresponding oil cylinder 1 is driven to extend or contract, a corresponding flow sensor 2 can detect a hydraulic oil flowing signal in an oil way, when the oil cylinder 1 extends or contracts to a limit position, hydraulic oil in the oil way does not flow any more, the corresponding flow sensor 2 loses the hydraulic oil flowing signal, namely when the flow sensor 2 of the previous working oil cylinder subsystem loses the hydraulic oil flowing signal, the next working oil cylinder subsystem is controlled to be started, the previous working oil cylinder subsystem is closed, and the process is circulated; the opening and closing of the working oil cylinder subsystem are controlled by the loss and gain of signals of the flow sensor 2, the system is not influenced by system pressure impact, the control is simple and convenient, the accuracy is high, the flow sensor 2 can be connected to any position of the first oil supply pipe 3 or the second oil supply pipe 4 in series, the installation is simple and convenient, and the structural limitation of a movement mechanism is avoided.
With continued reference to fig. 1, preferably, the oil supply device includes a directional control valve, an oil inlet P of the directional control valve is communicated with the oil inlet path 7, an oil return port T of the directional control valve is communicated with the oil return path 8, the first oil supply pipe 3 of the oil cylinder 1 is communicated with the working oil port a of the directional control valve, and the second oil supply pipe 4 of the oil cylinder 1 is communicated with the working oil port B of the directional control valve; the oil return oil path 8 is connected with an oil tank, the oil inlet oil path 7 is connected with a hydraulic pump, the hydraulic pump is connected with the oil tank so as to suck and convey hydraulic oil in the oil tank to each working oil cylinder subsystem, the reversing valve can realize switching of the communication relation between the first oil supply pipe 3 and the oil inlet oil path 7 and the oil return oil path 8 and switching of the communication relation between the second oil supply pipe 4 and the oil inlet oil path 7 and the oil return oil path 8 respectively, the piston rod of the corresponding oil cylinder 1 is controlled to extend and contract, and in a normal state, the reversing valve disconnects the connection between the first oil supply pipe 3 and the second oil supply pipe 4 and the oil inlet oil path 7 and the oil return oil path 8 so that the corresponding oil cylinder 1 keeps an extending or contracting. Further preferably, the reversing valve of each working oil cylinder subsystem is an electromagnetic reversing valve 6, and the starting and the closing of the corresponding working oil cylinder subsystem are controlled by the power on and the power off of the electromagnetic reversing valve 6, so that the working oil cylinder subsystem is conveniently connected and controlled with a controller, and the automation degree of the hydraulic system is improved.
With reference to fig. 1, preferably, each working cylinder subsystem further includes a speed control valve 5, the first oil supply pipe 3 and/or the second oil supply pipe 4 is provided with the speed control valve 5, that is, the first oil supply pipe 3 of each working cylinder subsystem is provided with a speed control valve 5, or the second oil supply pipe 4 of each working cylinder subsystem is provided with a speed control valve 5, or the first oil supply pipe 3 and the second oil supply pipe 4 of each working cylinder subsystem are both provided with a speed control valve 5, and the movement speed of the corresponding cylinder 1 is adjusted by adjusting the opening degree of the speed control valve 5, so that the adjustment is simple and convenient.
Referring to fig. 1, in addition, the present invention also provides a control method for sequentially controlling a hydraulic system, comprising the steps of:
1) firstly, the hydraulic system is installed and connected;
2) starting all the working oil cylinder subsystems in sequence, when the previous working oil cylinder subsystem is started, the oil supply device of the working oil cylinder subsystem supplies oil to the corresponding oil cylinder 1 to drive the piston rod of the corresponding oil cylinder 1 to extend or contract, in the process, the flow sensor 2 of the working oil cylinder subsystem obtains a hydraulic oil flow signal, when the piston rod of the oil cylinder 1 moves to a limit position, the flow sensor 2 loses the hydraulic oil flow signal, when the flow sensor 2 of the previous working oil cylinder 1 subsystem loses the hydraulic oil flow signal, the next working oil cylinder subsystem is started, namely the oil supply device of the next working oil cylinder subsystem is controlled to supply oil to the corresponding oil cylinder 1, the piston rod of the corresponding oil cylinder 1 is driven to extend or contract, and the previous working oil cylinder subsystem is closed, namely the oil supply device of the previous working oil cylinder subsystem is controlled to cut off the supply of the hydraulic oil of the corresponding oil cylinder 1, keeping a piston rod of the oil cylinder 1 of the previous working oil cylinder subsystem in an extension state or a contraction state, and circulating in this way;
3) and (3) after all the working oil cylinder subsystems are started sequentially, repeating the step (2), starting all the working oil cylinder subsystems sequentially again, and driving the oil cylinder 1 of each working oil cylinder subsystem to return to the original position. The sequence of returning the oil cylinders 1 of all the working oil cylinder subsystems to the original positions can be the same as or opposite to the sequence of the working oil cylinder subsystems in the step 2), and can also be sequenced according to actual needs as required, and in the process, the control method of the hydraulic system is consistent with the control method in the step 2).
With continued reference to fig. 1, preferably, the oil supply device of each working oil cylinder subsystem includes a directional control valve, an oil inlet P of the directional control valve is communicated with the oil inlet path 7, an oil return port T of the directional control valve is communicated with the oil return path 8, the first oil supply pipe 3 of the oil cylinder 1 is communicated with a working oil port a of the directional control valve, and the second oil supply pipe 4 of the oil cylinder 1 is communicated with a working oil port B of the directional control valve; the reversing valve can realize switching of the communication relation between the first oil supply pipe 3 and the oil inlet oil way 7 and the oil return oil way 8 and switching of the communication relation between the second oil supply pipe 4 and the oil inlet oil way 7 and the oil return oil way 8, and in a normal state, the reversing valve disconnects the first oil supply pipe 3 and the second oil supply pipe 4 from the oil inlet oil way 7 and the oil return oil way 8. When the reversing valve is communicated with the connection between the first oil supply pipe 3 and the second oil supply pipe 4 of the corresponding oil cylinder 1 and the oil inlet oil way 7 and the oil return oil way 8, the piston rod of the oil cylinder 1 is driven to extend or contract; when the connection between the first oil supply pipe 3 and the second oil supply pipe 4 of the corresponding oil cylinder 1 and the oil inlet oil way 7 and the oil return oil way 8 is disconnected by the reversing valve, the piston rod of the oil cylinder 1 is kept in an extension state or a contraction state, and the control is simple and convenient. Further preferably, the reversing valve of each working oil cylinder subsystem is an electromagnetic reversing valve 6, the electromagnetic reversing valve 6 is powered on, the connection between the first oil supply pipe 3 and the second oil supply pipe 4 of the corresponding oil cylinder 1 and the oil inlet path 7 and the oil return path 8 is switched on, the piston rod of the corresponding oil cylinder 1 is driven to extend or contract, namely when the initial state of the piston rod of the oil cylinder 1 is a contraction state, the first electromagnet 6-1 of the electromagnetic reversing valve 6 is controlled to be powered on, the connection between the first oil supply pipe 3 and the oil inlet path 7 of the oil cylinder 1 and the connection between the second oil supply pipe 4 and the oil return path 8 are switched on, the piston rod of the driving oil cylinder 1 is controlled to extend, when the oil cylinder 1 needs to return to the original position, the second electromagnet 6-2 of the electromagnetic reversing valve 6 is controlled to be powered on, the connection between the first oil supply pipe 3 and the oil return path 8 of the oil cylinder 1 and the connection between the second oil supply, controlling a piston rod of the driving oil cylinder 1 to contract and return to the original position; similarly, when the initial state of the piston rod of the oil cylinder 1 is an extension state, the second electromagnet 6-2 of the electromagnetic directional valve 6 is controlled to be powered on to drive the piston rod of the oil cylinder 1 to contract, then the first electromagnet 6-1 of the electromagnetic directional valve 6 is controlled to be powered on to drive the piston rod of the oil cylinder 1 to extend and return to the original position; and when the electromagnetic directional valve 6 is powered off, the connection between the first oil supply pipe 3 and the second oil supply pipe 4 of the corresponding oil cylinder 1 and the connection between the oil inlet oil way 7 and the oil return oil way 8 are disconnected, and the piston rod of the corresponding oil cylinder 1 is kept in an extension state or a contraction state. The start and the close of the corresponding working oil cylinder subsystem are controlled by the power on and the power off of the electromagnetic directional valve 6, so that the connection control with a controller is facilitated, and the automation degree of a hydraulic system is improved.
With continued reference to fig. 1, preferably, each working cylinder subsystem further includes a speed control valve 5, the first oil supply pipe 3 and/or the second oil supply pipe 4 are connected in series with the speed control valve 5, the movement speed of the corresponding cylinder 1 is adjusted by adjusting the opening degree of the speed control valve 5, the movement speed of the cylinder 1 of each working cylinder subsystem can be adjusted according to actual demands, and the working cylinder subsystem is convenient and practical.
The hydraulic system of the utility model can be operated manually, the hydraulic oil flow information fed back by the flow sensor 2 is used for manually controlling the starting and closing of the working oil cylinder subsystems, in order to improve the automation degree of the hydraulic system, the hydraulic system also comprises a controller, the flow sensor 2 and the electromagnetic directional valve 6 of each working oil cylinder subsystem are both connected with the controller, the controller can control the power-on and power-off of the corresponding electromagnetic directional valve 6 according to the hydraulic oil flow signal transmitted by the flow sensor 2, thereby controlling the extension or contraction of the piston rod driving the corresponding oil cylinder 1, namely controlling the starting and closing of the corresponding working oil cylinder subsystems, so that all the working oil cylinder subsystems can be started in sequence, the control method is simple and convenient, the hydraulic system is not impacted by the pressure in the system, the occurrence of misoperation events is avoided, and when the previous working oil cylinder subsystem reaches the stroke end point, the latter working cylinder subsystem is started and the flow sensor 2 can be connected in series at any position on the first oil supply pipe 3 or the second oil supply pipe 4, so that the installation and the use of the hydraulic system are not limited by the structure of the moving mechanism.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. A sequence control hydraulic system comprises a plurality of working oil cylinder subsystems, wherein each working oil cylinder subsystem comprises an oil cylinder and an oil supply device, a rodless cavity of the oil cylinder is connected with the oil supply device through a first oil supply pipe, and a rod cavity of the oil cylinder is connected with the oil supply device through a second oil supply pipe; the system is characterized in that a flow sensor is arranged on the first oil supply pipe or the second oil supply pipe of each working oil cylinder subsystem.
2. The sequential control hydraulic system according to claim 1, wherein the oil supply device comprises a directional control valve, an oil inlet P of the directional control valve is communicated with an oil inlet path, an oil return port T of the directional control valve is communicated with an oil return path, the first oil supply pipe of the oil cylinder is communicated with a working oil port a of the directional control valve, and the second oil supply pipe of the oil cylinder is communicated with a working oil port B of the directional control valve; the reversing valve can realize switching of the communication relation between the first oil supply pipe and the oil inlet oil way and switching of the communication relation between the second oil supply pipe and the oil inlet oil way and the oil return oil way, and in a normal state, the reversing valve disconnects the first oil supply pipe and the second oil supply pipe from the oil inlet oil way and the oil return oil way.
3. A sequential control hydraulic system according to claim 2, wherein the directional control valve is a solenoid directional control valve.
4. The sequential control hydraulic system according to claim 1, wherein each working cylinder subsystem further comprises a speed regulating valve, and one speed regulating valve is arranged on the first oil supply pipe and/or the second oil supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920531109.6U CN210113400U (en) | 2019-04-18 | 2019-04-18 | Sequential control hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920531109.6U CN210113400U (en) | 2019-04-18 | 2019-04-18 | Sequential control hydraulic system |
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| CN210113400U true CN210113400U (en) | 2020-02-25 |
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| CN201920531109.6U Active CN210113400U (en) | 2019-04-18 | 2019-04-18 | Sequential control hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989954A (en) * | 2019-04-18 | 2019-07-09 | 广西玉柴专用汽车有限公司 | A kind of sequential-controlled hydraulic system and its control method |
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2019
- 2019-04-18 CN CN201920531109.6U patent/CN210113400U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989954A (en) * | 2019-04-18 | 2019-07-09 | 广西玉柴专用汽车有限公司 | A kind of sequential-controlled hydraulic system and its control method |
| CN109989954B (en) * | 2019-04-18 | 2024-04-05 | 广西玉柴专用汽车有限公司 | Sequential control hydraulic system and control method thereof |
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