CN112555209A - Electric control device for series-parallel switching of hydraulic oil circuit - Google Patents
Electric control device for series-parallel switching of hydraulic oil circuit Download PDFInfo
- Publication number
- CN112555209A CN112555209A CN202011576669.7A CN202011576669A CN112555209A CN 112555209 A CN112555209 A CN 112555209A CN 202011576669 A CN202011576669 A CN 202011576669A CN 112555209 A CN112555209 A CN 112555209A
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- Prior art keywords
- oil
- parallel
- button
- reversing
- series
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/082—Servomotor systems incorporating electrically operated control means with different modes
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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
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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
Abstract
The invention relates to an electrical control device for series-parallel switching of hydraulic oil paths, which takes a control loop consisting of electrical elements in an electrical control box as a core device, and realizes that a single valve table controls a double-oil-cylinder system through input and output elements of a limit switch, a knob, a button and an electromagnetic valve module: the rotary switch and the button are operated to realize the switching of the hydraulic oil circuit in the serial and parallel modes; operating a rotary switch and a button in a parallel mode to switch a hydraulic oil circuit in a single-circulation parallel mode and a continuous parallel mode; the operation button changes the direction of an oil path in the valve table to realize the forward and backward movement of the oil cylinder. The invention takes the electric control box with high integration degree as a control core component, utilizes the input components such as the limit switch and the button, and transmits the direct current control voltage to the novel series-parallel switching hydraulic valve group after the execution of the electric loop, thereby realizing the safe switching between the series connection and the parallel connection of the hydraulic oil circuit.
Description
Technical Field
The invention relates to the field of hydraulic drive, in particular to a hydraulic drive system for simultaneously driving two oil cylinders by a single hydraulic valve table.
Background
The number of hydraulic cylinders driven by a single valve station of a traditional hydraulic system is generally only two cases: 1) single valve stand driving single cylinder 2) the other is that the single valve stand simultaneously drives two or more cylinders. In the second case, when a single valve table drives multiple cylinders, the multiple cylinders are generally connected in series or in parallel in a single connection manner, that is, only one of the two connection manners is used in the same hydraulic system, and the two connection manners do not exist at the same time. However, the two systems have advantages and disadvantages in the operation process, wherein the serial connection of the oil cylinders has the characteristic of very good synchronism but weaker thrust, and the parallel connection of the oil cylinders has the characteristic of strong thrust but weaker synchronism. In order to realize coexistence of two connection modes in the same system and realize artificial switching, operation and control, it is necessary to develop a simple and reliable electric control system.
The hydraulic system is widely applied in various industrial fields, and when the hydraulic valve table is connected with the load oil cylinder, the hydraulic valve table is divided into two types, namely a single valve table driving single cylinder and a single valve table driving multi-cylinder. In a system with a plurality of cylinders driven by a single valve table, the connection mode of a plurality of cylinders in a load is not 'series' or 'parallel', wherein the series refers to that the oil inlet pipelines and the oil return pipelines of the cylinders are connected in series end to end in sequence, and hydraulic oil can sequentially pass through the cylinders. The oil cylinders are connected end to end in parallel, and hydraulic oil can pass through the oil cylinders simultaneously. Different modes also have the advantages and the disadvantages: wherein the series synchronism is good, but the thrust is limited; the parallel operation has strong thrust, but the synchronism is general; in order to combine these two functions in a complete system, it is also important to develop a simple but reliable electrical control device for command input, sequential control execution and command output, in addition to designing a new hydraulic valve set.
Disclosure of Invention
The purpose of the invention is: firstly, the device provides a power supply and a driving instruction for the hydraulic valve table, secondly, the device is manually operated, so that the oil circuit in the hydraulic valve table can be safely and flexibly switched between a series mode and a parallel mode, and thirdly, the device is manually operated, so that the functions of advancing, retreating, stopping and the like of the oil cylinder are realized.
The invention utilizes the electric elements to assemble and develop an electric control box which is convenient to install, a travel switch signal arranged on the oil cylinder is connected to the inside of the electric control box, the electric control box is operated by a rotary switch and a button outside the electric control box, and a driving power supply of the electromagnetic reversing module and the oil circuit switching module is transmitted to the valve table through the execution of an internal electric control loop. Finally, the oil way trend of the hydraulic system is changed through the displacement of the valve core in the valve table, and further the connection mode of the two oil cylinders in the synchronous action process is changed.
The specific technical scheme of the invention is as follows:
the utility model provides an electric control device for hydraulic pressure oil circuit series-parallel connection switches to the control circuit that electric elements constitutes in the electrical control box is core device, through limit switch, knob, button, solenoid valve module input and output element, has realized among the system of single valve platform control double oil cylinder: the rotary switches (4) and (7) and the buttons (5) and (6) are operated to realize the switching of the hydraulic oil paths in the series and parallel modes; the rotary switch (7) and the button (5) are operated in the parallel mode, and the button (6) switches the hydraulic oil circuit in the single-circulation parallel mode and the continuous parallel mode; the operation buttons (2) and (3) change the direction of an oil path in the valve table to realize the forward and backward movement of the oil cylinder.
The invention also provides a control method of the electric control device for series-parallel switching of the hydraulic oil paths, wherein the hydraulic oil paths are switched in series and parallel modes by operating the rotary switch (4), the switch (7), the button (5) and the button (6), and the control method is characterized in that: when the rotary switch (4) is switched to the local mode, if the rotary switch (7) rotates in the manual oil path reversing mode, the oil path reversing button is not operated, the hydraulic oil paths are in serial connection, and the oil path trend when the two oil cylinders advance in series is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the water core, the straining site (B), the train-straining site and the top. When the oil way reversing button (5) is pressed, the oil ways can keep parallel connection operation in the following single circulation action, and the trend of the oil ways when the two oil cylinders advance in parallel is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, two oil paths simultaneously pass through an oil cylinder A and an oil cylinder B at this time, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through the oil cylinder A and the oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through the oil port. When the rotary switch (7) rotates in an automatic oil path reversing mode, the hydraulic oil paths are in serial connection without operating an oil path reversing button, the oil paths can be kept in parallel connection operation all the time when the oil path reversing button (5) is pressed, the oil paths in continuous parallel operation are the same as the single-cycle parallel oil paths, and the oil paths can be switched to be in serial connection operation again until the oil path reversing stop button (6) is pressed.
Further, the rotary switch (7) and the button (5) are operated in the parallel mode, and the button (6) switches the hydraulic oil circuit in the single-cycle parallel and long-time uninterrupted parallel mode, and the hydraulic oil circuit is characterized in that: the electric device can not only switch the hydraulic oil route series connection into the parallel connection operation, but also select the time of the parallel connection operation. When the rotary switch (7) rotates in the automatic oil path reversing mode, the oil paths are kept in parallel until the oil path reversing stop button (6) is pressed after the oil path reversing button (5) is pressed; when the rotary switch (7) rotates in a manual oil path reversing mode, the parallel connection duration is only maintained for one cycle action period after the oil path reversing button (5) is pressed, the reason is that after the retreating limit switch is triggered, the break contact of the time relay ST1 is triggered, the duration is 0.5S, namely when the oil path reversing is pressed in the manual reversing mode, the valve platform moves forward to the right position and retreats to the right position, the contact of the time relay ST1 connected in series with the electric circuit is disconnected, the parallel connection mode cannot be self-locked, and the parallel connection duration is ended.
Further, operating button (2), button (3) change the inside oil circuit of valves and move towards the advance and retreat that realize the hydro-cylinder, and this electrical operation case cabinet door surface has inlayed operating button (2), the button (3) that control was advanced, retreat the direction, and the control mode of taking is non-self-sustaining electric loop: when the button is pressed, the corresponding reversing module is electrified, so that the oil cylinder moves in the corresponding direction, and when the button is released, the corresponding reversing module is immediately electrified, so that the oil cylinder stops moving.
Furthermore, a control loop consisting of an electric control box and internal electric elements is taken as a core device, the electric device is controlled by interconnecting and assembling circuit elements, power and control voltage in the circuit are direct current, the voltage level is DC24V, and all control circuits are intensively placed in the electric control box.
The invention has the beneficial effects that: the two oil cylinders can be switched in a serial connection mode and a parallel connection mode by operating a rotary switch and a button on the electric control box, and synchronous forward or backward movement is realized; the parallel function can be realized as follows: selecting in two modes of parallel connection and continuous uninterrupted parallel connection during a single circulation period; the multifunctional electric switch has the advantages of having multiple functions and being capable of being switched randomly, high in flexibility, simple and uncomplicated in an electric loop, high in reliability and convenient to overhaul and maintain. Meanwhile, the driving voltage of the selected electromagnetic valve is DC24, the voltage level is low, and the safety is high.
The invention is further illustrated with reference to the following figures and examples.
Drawings
Fig. 1 is an electrical schematic diagram of an oil passage switching device.
Fig. 2 is a schematic diagram of oil passages of the series-parallel switching hydraulic valve station.
As shown in the figures, the equipment and components in each figure are explained by referring to the comments and the legend.
Specific technical scheme
As shown in fig. 1: the internal circuit of the electrical control schematic diagram of the device mainly receives instructions of an oil cylinder limit switch, a rotary switch, a button and the like, and transmits an electrical signal to an actuating mechanism such as an indicator light, a reversing module and the like through the execution of an electrical circuit. Wherein SQ1, SQ2 are the advance of hydro-cylinder respectively and retreat to reach limit switch, SB1, SB2 are the button that control valve platform oil circuit advanced and retreat respectively. YV1, YV2 are the coils for the forward and reverse commutation modules, respectively. The electric signals are transmitted to actuating mechanisms such as an indicator light and an oil way switching module through the execution of the electric circuit. The SA2 knob is an oil path switching knob, and the oil path reversing can be selected to be kept for one circulation time or a long time. Wherein the SB3 button is an oil path reversing button, the SB0 button is an oil path reversing stop button, and the YV3 oil path reversing valve coil.
As shown in fig. 2: the oil inlet and outlet of each module are named as a first oil port, a second oil port and a third oil port in sequence until a fifteenth oil port is known. The hydraulic oil sequentially passes through the stop module I, the throttling speed regulation module II, the reversing module III, the balancing module IV and the oil way switching module V from the oil inlet to the oil cylinder, then enters the oil cylinder A and the oil cylinder B, then is discharged from the tail part of the oil cylinder, and then passes through the reversing module and the stop module again and then flows out of the valve table from the fifteenth oil port. The right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil way switching module is not electrified, and the oil way sequentially passes through the oil port, the water core, the straining point (B), the train-straining point (A), the self-lifting point (C), and the self-lifting point (A); when the two oil cylinders advance in parallel, the trend of the oil path is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, two oil paths simultaneously pass through an oil cylinder A and an oil cylinder B at this time, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through an oil cylinder A and an oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. The solenoid supply level of the commutation module and the oil circuit switching module is DCC 4V.
Example:
the electric control device is applied to a fire grate hydraulic driving system in a factory area, 28 series-parallel switching valve tables described in the invention are used in a single production line of the project, the pressure of oil inlets of all the valve tables is 18MPa, the pressure of outlets of the valve tables is about 13MPa, and outlets of each single valve group are connected with two oil cylinders. The series-parallel switching frequency in the system is about 1 time/min and basically in a 24-hour uninterrupted operation state, and the safety and the value of the electric device are verified through the project.
Claims (4)
1. The utility model provides an electric control device for hydraulic pressure oil circuit series-parallel connection switches which characterized in that, uses the control circuit that the inside electric elements of electrical control box constitutes as core device, through limit switch, knob, button, solenoid valve module input and output element, has realized in the system of single valve platform control double oil cylinder: the rotary switches (4) and (7) and the buttons (5) and (6) are operated to realize the switching of the hydraulic oil paths in the series and parallel modes; the rotary switch (7) and the button (5) are operated in the parallel mode, and the button (6) switches the hydraulic oil circuit in the single-circulation parallel mode and the continuous parallel mode; the operation buttons (2) and (3) change the direction of an oil path in the valve table to realize the forward and backward movement of the oil cylinder.
2. A control method of an electric control device for series-parallel switching of hydraulic circuits according to claim 1, characterized in that said operating rotary switch (4), switch (7) and push-buttons (5, 6) switches hydraulic circuits in series and parallel modes, characterized in that: when the rotary switch (4) is switched to the local mode, if the rotary switch (7) rotates in the manual oil path reversing mode, the oil path reversing button is not operated, the hydraulic oil paths are in serial connection, and the oil path trend when the two oil cylinders advance in series is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil way switching module is not electrified, and the oil way sequentially passes through the oil port, the water core, the straining point (B), the train-straining point (A), the self-lifting point (C), and the self-lifting point (A); when the oil way reversing button (5) is pressed, the oil ways can keep parallel connection operation in the following single circulation action, and the trend of the oil ways when the two oil cylinders advance in parallel is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, two oil paths simultaneously pass through an oil cylinder A and an oil cylinder B at this time, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through an oil cylinder A and an oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the rotary switch (7) rotates in an automatic oil path reversing mode, the hydraulic oil paths are in serial connection without operating an oil path reversing button, the oil paths can be kept in parallel connection operation all the time when the oil path reversing button (5) is pressed, the oil paths in continuous parallel operation are the same as the single-cycle parallel oil paths, and the oil paths can be switched to be in serial connection operation again until the oil path reversing stop button (6) is pressed.
3. A control method of an electric control apparatus for series-parallel switching of hydraulic circuits according to claim 2, characterized in that the rotary switch (7) and the push button (5), the push button (6) are operated in parallel mode to switch the hydraulic circuits in single-cycle parallel and long-time uninterrupted parallel mode, characterized in that: the electric device can not only switch the series connection of the hydraulic oil routes into the parallel connection operation, but also select the time of the parallel connection operation; when the rotary switch (7) rotates in the automatic oil path reversing mode, the oil paths are kept in parallel until the oil path reversing stop button (6) is pressed after the oil path reversing button (5) is pressed; when the rotary switch (7) rotates in a manual oil path reversing mode, the parallel connection duration is only maintained for one cycle action period after the oil path reversing button (5) is pressed, the reason is that after the retreating limit switch is triggered, the break contact of the time relay ST1 is triggered, the duration is 0.5S, namely when the oil path reversing is pressed in the manual reversing mode, the valve platform moves forward to the right position and retreats to the right position, the contact of the time relay ST1 connected in series with the electric circuit is disconnected, the parallel connection mode cannot be self-locked, and the parallel connection duration is ended.
4. The control method of the electric control device for the series-parallel switching of the hydraulic oil circuits is characterized in that the operation buttons (2) and (3) change the oil circuit direction in the valve group to realize the advancing and the retreating of the oil cylinder, the operation buttons (2) and (3) for controlling the advancing and the retreating directions are embedded on the surface of the cabinet door of the electric operation box, and the control mode is a non-self-holding electric loop: when the button is pressed, the corresponding reversing module is electrified, so that the oil cylinder moves in the corresponding direction, and when the button is released, the corresponding reversing module is immediately electrified, so that the oil cylinder stops moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011576669.7A CN112555209A (en) | 2020-12-28 | 2020-12-28 | Electric control device for series-parallel switching of hydraulic oil circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011576669.7A CN112555209A (en) | 2020-12-28 | 2020-12-28 | Electric control device for series-parallel switching of hydraulic oil circuit |
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| Publication Number | Publication Date |
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| CN112555209A true CN112555209A (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011576669.7A Pending CN112555209A (en) | 2020-12-28 | 2020-12-28 | Electric control device for series-parallel switching of hydraulic oil circuit |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60240912A (en) * | 1984-05-15 | 1985-11-29 | Sanki Eng Co Ltd | Hydraulic device for control of movable fire grate in refuse incinerator |
| CN2083689U (en) * | 1990-11-19 | 1991-08-28 | 李福祚 | Boiler series all-automatic protecting alarm controlled device |
| CN2722050Y (en) * | 2004-08-04 | 2005-08-31 | 深圳市市政环卫综合处理厂 | Discharging system of refuse filtrate |
| CN102865581A (en) * | 2012-09-29 | 2013-01-09 | 吕庆忠 | Synchronous driving device for mechanical fire grate of fire grate type solid waste incinerator |
| CN106837945A (en) * | 2017-03-23 | 2017-06-13 | 马鞍山工蜂智能科技有限公司 | A kind of hydraulic safe electric control system |
| CN206892711U (en) * | 2017-05-09 | 2018-01-16 | 郑州宇通客车股份有限公司 | A kind of service life test stand frame and a kind of solenoid valve control circuit |
| CN207815352U (en) * | 2016-12-31 | 2018-09-04 | 上海康恒环境股份有限公司 | A kind of domestic waste incineration equipment bi-directional drive hydraulic system connection structure |
| CN110145745A (en) * | 2019-05-16 | 2019-08-20 | 绿色动力环保集团股份有限公司 | A kind of multi-driving inverse-push waste incinerator ACC control method and system |
| CN209761880U (en) * | 2018-12-31 | 2019-12-10 | 上海康恒环境股份有限公司 | Hydraulic driving system for large fire grate of garbage incinerator |
-
2020
- 2020-12-28 CN CN202011576669.7A patent/CN112555209A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60240912A (en) * | 1984-05-15 | 1985-11-29 | Sanki Eng Co Ltd | Hydraulic device for control of movable fire grate in refuse incinerator |
| CN2083689U (en) * | 1990-11-19 | 1991-08-28 | 李福祚 | Boiler series all-automatic protecting alarm controlled device |
| CN2722050Y (en) * | 2004-08-04 | 2005-08-31 | 深圳市市政环卫综合处理厂 | Discharging system of refuse filtrate |
| CN102865581A (en) * | 2012-09-29 | 2013-01-09 | 吕庆忠 | Synchronous driving device for mechanical fire grate of fire grate type solid waste incinerator |
| CN207815352U (en) * | 2016-12-31 | 2018-09-04 | 上海康恒环境股份有限公司 | A kind of domestic waste incineration equipment bi-directional drive hydraulic system connection structure |
| CN106837945A (en) * | 2017-03-23 | 2017-06-13 | 马鞍山工蜂智能科技有限公司 | A kind of hydraulic safe electric control system |
| CN206892711U (en) * | 2017-05-09 | 2018-01-16 | 郑州宇通客车股份有限公司 | A kind of service life test stand frame and a kind of solenoid valve control circuit |
| CN209761880U (en) * | 2018-12-31 | 2019-12-10 | 上海康恒环境股份有限公司 | Hydraulic driving system for large fire grate of garbage incinerator |
| CN110145745A (en) * | 2019-05-16 | 2019-08-20 | 绿色动力环保集团股份有限公司 | A kind of multi-driving inverse-push waste incinerator ACC control method and system |
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Application publication date: 20210326 |