CN112032128B - Apron board oil cylinder lifting control system and apron board - Google Patents
Apron board oil cylinder lifting control system and apron board Download PDFInfo
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- CN112032128B CN112032128B CN202010892849.XA CN202010892849A CN112032128B CN 112032128 B CN112032128 B CN 112032128B CN 202010892849 A CN202010892849 A CN 202010892849A CN 112032128 B CN112032128 B CN 112032128B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
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Abstract
The application relates to a rod iron production technical field, concretely relates to skirtboard hydro-cylinder lift control system and skirtboard, it includes: the oil supply device is provided with a proportional valve; the first oil way is connected with the proportional valve and the rodless cavity; the second oil way is connected with the proportional valve and the rod cavity; the first pressure detection device is arranged on the first oil way and used for detecting the pressure value of the first oil way; the second pressure detection device is arranged on the second oil way and used for detecting the pressure value of the second oil way; a third oil passage connecting the first oil passage and the second oil passage; and the first stop valve is arranged on the third oil path and is electrically connected with the first pressure detection device and the second pressure detection device, and the first stop valve can be opened in response to the detection results fed back by the first pressure detection device and the second pressure detection device. When a fault is generated, the first pressure detection device and the second pressure detection device send signals to the first stop valve to open the first stop valve, and the rod cavity is communicated with the rodless cavity under the condition of no shutdown, so that the fault oil cylinder acts along with other oil cylinders.
Description
Technical Field
The application relates to the technical field of steel bar production, in particular to a skirtboard oil cylinder lifting control system and a skirtboard.
Background
The apron board is longer, generally is driven by multiunit apron board hydro-cylinder simultaneously, in case the oil feeding system of a certain group apron board hydro-cylinder breaks down among them, leads to the unable normal oil supply, when apron board hydro-cylinder suppress pressure unable action, must shut down immediately and handle the trouble, and the common processing mode generally cancels this trouble apron board hydro-cylinder temporarily, for example: the failed apron board oil cylinder is completely disassembled from the apron board, and the rest apron board oil cylinders are utilized to drive the whole apron board to lift; or an oil pipe connected to the fault apron plate oil cylinder is disassembled to release pressure, so that the fault apron plate oil cylinder can synchronously stretch along with other apron plate oil cylinders. Because the existing treatment mode needs to be stopped, the stopping will influence the whole steel bar production line, and the error production can be caused.
Disclosure of Invention
The application aims at providing a skirtboard hydro-cylinder lift control system and skirtboard to solve the problem that the skirtboard hydro-cylinder needs to be shut down to handle faults in the prior art.
The embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a skirt plate cylinder lifting control system, which includes:
the oil supply device is provided with a proportional valve;
the first oil way is connected with the proportional valve and a rodless cavity of the apron plate oil cylinder;
The second oil way is connected with the proportional valve and a rod cavity of the apron plate oil cylinder;
the first pressure detection device is arranged on the first oil way and used for detecting the pressure value of the first oil way;
the second pressure detection device is arranged in the second oil way and is used for detecting the pressure value of the second oil way;
a third oil passage connecting the first oil passage and the second oil passage;
and a first cut-off valve provided in the third oil passage and electrically connected to the first pressure detection device and the second pressure detection device, the first cut-off valve being openable in response to a detection result fed back from the first pressure detection device and the second pressure detection device.
The apron board oil cylinder lifting control system provided by the application has the advantages that when the apron board oil cylinder fails to supply oil normally by an oil supply device and the apron board oil cylinder is blocked, the pressure values of a first oil way and a second oil way can be abnormally increased, the first pressure detection device and the second pressure detection device can detect the pressure values of the corresponding oil ways, when the pressure values are abnormally increased, the first pressure detection device and the second pressure detection device immediately send signals to a first stop valve, the first stop valve responds to the detection result and is immediately opened, so that a rod cavity and a rodless cavity are communicated through the first oil way, a third oil way and the second oil way, a piston rod of the apron board oil cylinder is not under the action of oil pressure, the problem of pressure blocking is solved, the piston rod can freely stretch and retract, the problem of processing of the failed oil cylinder without stopping the machine is realized, and the apron board oil cylinder can synchronously stretch and retract along with other apron board oil cylinders, and the production is processed after normal shutdown until the production is finished, so that shutdown and error production caused by the fault of an individual apron plate oil cylinder are avoided.
In an embodiment of the present application, optionally, the control system further includes:
the second stop valve is arranged on the first oil way and is positioned between the connection end of the first oil way and the third oil way and the proportional valve;
and the third stop valve is arranged on the second oil way and is positioned between the connection end of the second oil way and the third oil way and the proportional valve.
Because the fault factor is unknown, the control valve set formed by the oil supply device and the proportional valve thereof is possibly clamped in a full-open state, the control valve set is also possibly clamped in a full-closed state, or the control valve set is clamped in a half-open and half-closed state, when the control valve set is clamped in the full-open state or the half-open and half-closed state, the apron plate oil cylinder in the fault state can follow the action once and can be accompanied with a pressure relief process, the pressure relief is frequently carried out at the fault place, the pressure of the whole system is possibly unstable, and the internal oil temperature is also easily increased, in the technical scheme, the second stop valve and the third stop valve can further cut off a connecting oil path between the apron plate oil cylinder and the oil supply device, and the apron plate oil cylinder and the oil supply device which can not normally supply oil are cut off, so that the control valve set formed by the oil supply device and the proportional valve thereof is clamped in any state, the problem of the skirt board oil cylinder pressure holding can be well solved, and the oil pressure and the oil temperature of the whole system are kept stable.
In an embodiment of the present application, optionally, the second stop valve is electrically connected to the first pressure detection device and the second pressure detection device, and the third stop valve is electrically connected to the first pressure detection device and the second pressure detection device;
the second and third stop valves are each capable of closing in response to detection results fed back by the first and second pressure detection means.
In the technical scheme, when the pressure value is abnormally increased, the first pressure detection device and the second pressure detection device immediately send signals to the first stop valve so that the rod cavity and the rodless cavity are communicated through the first oil way, the third oil way and the second oil way, and meanwhile, the signals are sent to the second stop valve and the third stop valve, so that the connection between the hydraulic apron plate oil cylinder and the oil supply device is synchronously disconnected, the problem of pressure building of the apron plate oil cylinder is further solved under the condition of no stop, and the processing process is automatic and quick in response.
In an embodiment of the application, optionally, the first pressure detection device and the second pressure detection device are pressure relays respectively.
In the technical scheme, the pressure detection device adopts the pressure relay, when the pressure of the oil circuit where the pressure detection device is located reaches a preset value, an electric signal is output to the stop valve to enable the stop valve to act, the reaction is rapid, and the influence caused by pressure building can be rapidly eliminated.
In an embodiment of the present application, optionally, the control system further includes a pilot operated check valve, and the proportional valve connects the first oil passage and the second oil passage through the pilot operated check valve.
In the technical scheme, the oil supply device supplies pressure to the apron board oil cylinder through the proportional valve and the hydraulic control one-way valve, the hydraulic control one-way valve does not influence the supply of pressure to the apron board oil cylinder by the proportional valve in a normal working state, and when the hydraulic apron board oil cylinder needs to be locked, the hydraulic control one-way valve seals the hydraulic oil in the apron board of the oil cylinder in the oil cylinder to prevent the apron board from descending due to leakage in the proportional valve, so that the apron board oil cylinder can be locked at a high position for a long time.
In one embodiment of the present application, optionally, the proportional valve is a Y-type mid-position functioning proportional valve.
In the technical scheme, when the apron board oil cylinder needs to be suspended at a high position, the hydraulic oil in the apron board oil cylinder is sealed in the apron board oil cylinder by the hydraulic control one-way valve, the Y-shaped middle position function proportional valve is located at a middle position at the moment so as to completely discharge the hydraulic control oil pressure of the hydraulic control one-way valve, the hydraulic control one-way valve can be effectively prevented from being held open by the hydraulic control oil pressure, the locking effect of the hydraulic control one-way valve is further ensured, and the problem that the apron board oil cylinder is locked at the high position for a long time is further solved.
In an embodiment of the present application, optionally, the oil supply device further includes a pressure pipeline and an oil return pipeline, and the pressure pipeline and the oil return pipeline are respectively connected to the proportional valve; and a fourth stop valve is arranged on the pressure pipeline, and a one-way valve is arranged on the oil return pipeline.
In the technical scheme, the fourth stop valve can be opened or closed to control whether to supply oil to the apron plate oil cylinder or not, and the one-way valve is used for preventing the backflow of the oil return pipeline, so that the stable work of the oil supply device is ensured.
In an embodiment of the present application, optionally, a first pressure tapping point is provided on the pressure line.
In above-mentioned technical scheme, first pressure measurement contact can connect the manometer with measurement system total pressure to whether detect oil supply unit supplies oil according to the predetermined pressure value and presses.
In an embodiment of the present application, optionally, a second pressure measuring contact is disposed on the oil return line.
In above-mentioned technical scheme, the second pressure measurement contact can connect the manometer and measure return oil pressure to whether the oil supply unit oil return of detection is normal.
In a second aspect, an embodiment of the present application provides a skirt board, the skirt board is connected with a plurality of skirt board cylinders, and each skirt board cylinder is provided with the aforementioned skirt board cylinder lifting control system.
The apron board provided by the application is synchronously driven by a plurality of apron board oil cylinders, when any apron board oil cylinder fails and is subjected to pressure build-up, the lifting control system of the failed apron board oil cylinder can quickly detect abnormality and automatically enable the rod cavity and the rodless cavity of the apron board oil cylinder to be communicated, so that the failed apron board oil cylinder can not be acted by oil pressure and acts along with other apron board oil cylinders, steel throwing of the apron board is not influenced, and special shutdown is not needed for processing faults.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic connection structure diagram of a skirt cylinder lifting control system according to an embodiment of the present application.
Icon: 100-pressure line; 110-a fourth stop valve; 120-a first pressure tap; 200-an oil return pipeline; 210-a one-way valve; 220-a second pressure measurement junction; 300-a proportional valve; 410-a first oil path; 411-a first hose; 420-second oil circuit; 421-a second hose; 430-third oil way; 500-apron board oil cylinder; 510-rodless chamber; 520-a rod cavity; 610-a first pressure detection device; 620-second pressure detection means; 710-a first shut-off valve; 720-a second stop valve; 730-a third stop valve; 800-hydraulic control one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
The appearances of the terms "first," "second," and the like in the description of the present application are only used for distinguishing between the descriptions and are not intended to be construed as indicating or implying relative importance.
Examples
The embodiment of the application provides an apron board, this apron board is equipped with the main shaft, connects a plurality of apron board hydro-cylinders 500 on the main shaft, and a plurality of apron board hydro-cylinders 500 stretch out and draw back simultaneously in order to drive the apron board and go up and down to accomplish and throw the steel.
Each apron cylinder 500 for driving the apron is provided with an apron cylinder lifting control system.
The lifting control system can control the skirt board oil cylinders 500 to extend under the action of oil pressure, and can rapidly enable the skirt board oil cylinders 500 with faults to be in a floating state by relieving the oil pressure when a certain skirt board oil cylinder 500 is in fault pressure build-up, and the piston rods of the skirt board oil cylinders 500 with faults can freely extend and retract so as to follow the actions of other skirt board oil cylinders 500 and avoid influencing steel throwing work.
As shown in fig. 1, the skirt cylinder lift control system includes an oil supply device, a first pressure detecting device 610, a second pressure detecting device 620, and a first shut-off valve 710, as well as a first oil passage 410, a second oil passage 420, and a third oil passage 430.
The oil supply device is provided with a proportional valve 300, a pressure pipeline 100 and an oil return pipeline 200, wherein the pressure pipeline 100 is used for outputting hydraulic oil, the oil return pipeline 200 is used for returning the hydraulic oil, the pressure pipeline 100 and the oil return pipeline 200 are respectively connected to the proportional valve 300, and oil supply or oil return is controlled through the proportional valve 300.
The proportional valve 300 is connected to a rodless chamber 510 of the skirt cylinder 500 through a first oil passage 410 and connected to a rod chamber 520 of the skirt cylinder 500 through a second oil passage 420. A first hose 411 is provided at the end of the first oil passage 410 so as to connect to a joint on the rodless chamber 510; the second hose 421 is provided at the end of the second oil passage 420 so as to be connected to the joint on the rod chamber 520.
When the a end of the proportional valve 300 is electrified, the proportional valve 300 controls the hydraulic oil in the pressure line 100 to enter the rodless chamber 510 through the first oil line 410, so as to push the piston rod to extend, and at this time, the hydraulic oil in the rod chamber 520 flows back to the proportional valve 300 through the second oil line 420 and flows back to the oil supply device from the oil return line 200.
When the b-end of the proportional valve 300 is electrified, the proportional valve 300 controls the hydraulic oil in the pressure line 100 to enter the rod chamber 520 through the second oil line 420, pushing the piston rod to retract, and the hydraulic oil in the rod-less chamber 510 flows back to the proportional valve 300 through the first oil line 410 and flows back to the oil supply device from the oil return line 200.
In order to control whether the oil supply device supplies pressure or not, a fourth cut-off valve 110 is provided on the pressure line 100. When the fourth cut-off valve 110 is closed, the pressure line 100 is blocked, and no oil supply pressure is available. When the fourth cut-off valve 110 is opened, the pressure line 100 is open, and the oil can be supplied.
In order to conveniently check whether the pressure supply is normal or not and whether the oil supply device supplies oil according to a preset pressure value or not, a first pressure measuring contact 120 is arranged on the pressure pipeline 100. During inspection and maintenance, a pressure gauge may be connected to the first pressure measuring contact 120 to measure the total pressure of the system.
In order to conveniently check whether the return pressure is normal, a second pressure measuring contact 220 is arranged on the return pipeline 200. During inspection and maintenance, the pressure gauge may be connected to the second pressure measuring contact 220 to measure the oil return pressure.
When lift control system less trouble appears, the small change can appear in the oil pressure, probably can not influence skirtboard hydro-cylinder 500 normal work this moment, but less trouble probably forms great trouble long time, sets up first pressure measurement contact 120 and second pressure measurement contact 220 and can conveniently be manual investigation before great trouble appears to in time solve, reduce the probability that great trouble such as the skirtboard hydro-cylinder 500 suppresses the pressure, guarantee skirtboard hydro-cylinder 500 normal work.
In order to make the oil supply and return work stably and circularly performed, a check valve 210 is further disposed on the oil return pipeline 200, and the check valve 210 allows the hydraulic oil to return to the oil supply device and prevents the hydraulic oil from reversely flowing out.
The first pressure detection device 610 is disposed in the first oil path 410 and configured to detect an oil pressure of the first oil path 410; the second pressure detection device 620 is provided in the second oil passage 420, and detects the oil pressure of the second oil passage 420.
In this embodiment, the first pressure detection device 610 and the second pressure detection device 620 are pressure relays, respectively.
The third oil passage 430 is connected between the first oil passage 410 and the second oil passage 420, and the first shutoff valve 710 is provided in the third oil passage 430.
Normally, the pressure values of the first oil path 410 and the second oil path 420 are relatively stable, the first shutoff valve 710 is in a closed state to block the third oil path 430, and the oil supply device normally drives the skirt cylinder 500.
When the oil supply device works abnormally and the apron oil cylinder 500 is subjected to pressure holding, at least one of the first oil passage 410 and the second oil passage 420 fluctuates and deviates from a normal pressure value or is higher than a certain preset pressure value, the first pressure detection device 610 or the second pressure detection device 620 immediately outputs an electric signal according to the detection result, and the first stop valve 710 is opened in response to the electric signal, so that the third oil passage 430 is communicated with the first oil passage 410 and the second oil passage 420, and the pressure holding problem is solved.
After the third oil passage 430 is connected, the rodless chamber 510 and the rod chamber 520 of the apron cylinder 500 are connected through the first oil passage 410, the third oil passage 430, and the second oil passage 420, so that the piston rod is in a floating state, can freely extend and retract, and is not limited by oil pressure.
Therefore, through the arrangement, the piston rod of the skirt board oil cylinder 500 with the pressure holding fault can freely stretch and retract along with other skirt board oil cylinders 500, and steel throwing work cannot be influenced.
In addition, the failure factor is unknown, and when the oil supply device works abnormally, the failure condition of the oil supply device and the control valve group formed by the proportional valve 300 thereof may be: the locking mechanism is locked in a fully-opened state, a fully-closed state or a half-opened and half-closed state. When the oil cylinder 500 is stuck in a fully-open state or a half-open and half-close state, the skirt plate oil cylinder 500 in a failure state may be accompanied by a pressure relief process once when acting once, in the prior art, an overflow valve is arranged on an oil path (on the first oil path 410 or the second oil path 420) of the rodless cavity 510 or the rod cavity 520 to assist in pressure relief, however, the pressure relief speed may not be matched with the fast lifting rhythm of the skirt plate, the movement of a piston rod is affected, the pressure of the whole system is easy to be unstable, and the internal oil temperature is easy to rise.
In order to better solve the problem that the skirtboard cylinder 500 suppresses pressure when the card is dead under the full open state or the half open and half close state, the piston rod can better match the rhythm of rapid lifting when freely stretching, and the internal oil pressure of the skirtboard cylinder 500 with faults is stable, so as to avoid other secondary conditions, a second stop valve 720 is arranged on the first oil path 410, and a third stop valve 730 is arranged on the third oil path 430. The second cut-off valve 720 is provided between the connection end of the third oil passage 430 and the first oil passage 410 and the proportional valve 300, and the third cut-off valve 730 is provided between the connection section of the third oil passage 430 and the second oil passage 420 and the proportional valve 300.
When the first pressure detecting device 610 or the second pressure detecting device 620 outputs an electric signal according to the detection result thereof, the first cut-off valve 710 is opened in response to the electric signal, and simultaneously, the second cut-off valve 720 and the third cut-off valve 730 are closed in response to the electric signal, thereby further blocking the connection of the proportional valve 300 and the skirt cylinder 500, and thus avoiding the occurrence of pressure relief or overflow.
That is, when the rodless chamber 510 and the rod chamber 520 of the skirt cylinder 500 are communicated with each other through the third oil passage 430, the connection between the skirt cylinder 500 and each other device is cut off by the second cut-off valve 720 and the third cut-off valve 730, the oil amount of the skirt cylinder 500 is not affected by the other devices to be decompressed or overflowed, the oil pressure of the skirt cylinder 500 is kept constant, the resistance of the piston rod is constant, the piston rod can be stably and freely extended and retracted, and each other device is not damaged in the free extension and retraction process.
In order to solve the problem that the skirt cylinder 500 is locked in the extended state to maintain the skirt in the high position during the production process, it is sometimes necessary to lock the skirt cylinder 500 in the extended state, and in the prior art, a proportional valve 300 capable of being locked by the sealing property of a spool of a slide valve, for example, the proportional valve 300 functioning as an O-type neutral position is generally used, but the proportional valve 300 may have an internal leakage to cause the skirt cylinder 500 to slowly descend when the skirt cylinder 500 is in the high position for a long time, and further, the proportional valve 300 is connected to the first oil passage 410 and the second oil passage 420 through the pilot operated check valve 800.
Under normal operating condition, the pilot operated check valve 800 does not influence the proportional valve 300 to the oil supply pressure of the apron board cylinder 500, when the apron board cylinder 500 needs to be locked in the extended state, the pilot operated oil circuit of the pilot operated check valve 800 is communicated with the return oil, and the communication between the proportional valve 300 and the apron board cylinder 500 is cut off, so that the apron board cylinder 500 keeps better sealing performance, and the problem that the apron board slowly descends when needing to be locked at a high position for a long time is solved.
In addition, when the skirt cylinder 500 is pressurized due to a failure, the third cut-off valve 730 is opened, and the third oil passage 430 is connected, the pilot check valve 800 may further cut off the first oil passage 410 and the second oil passage 420.
Further, the proportional valve 300 is configured as a Y-type mid-position function proportional valve 300. When the Y-shaped meso-position function proportional valve 300 is located at the meso-position, the hydraulic control oil pressure of the hydraulic check valve can be completely discharged, so that the hydraulic control check valve 800 is prevented from being held back due to the fact that the hydraulic control oil pressure is too large, the sealing performance of the hydraulic control check valve 800 during locking is improved, the locking effect of the hydraulic control check valve 800 is ensured, and the apron plate oil cylinder 500 is further ensured to be locked in a high-position state.
The apron board cylinder lifting control system in the embodiment provides a method for eliminating faults without stopping the machine, and solves the problem of production error caused by the fault of a specific apron board cylinder 500 in the prior art, the first oil way 410 connected with the rodless cavity 510 and the second oil way 420 connected with the rod cavity 520 can quickly block the connection with the proportional valve 300, the oil supply and oil return paths are cut off, and the rodless cavity 510 and the rod cavity 520 of the apron board cylinder 500 are communicated through the third oil way 430, so that when a certain apron board cylinder 500 of an apron board breaks down, the piston rod of the broken apron board cylinder 500 can freely stretch along with the piston rods of other apron board cylinders 500.
That is, the whole control valve group formed by the oil supply device with faults and the proportional valve 300 thereof is automatically blocked and isolated from the lifting control system, so that the piston rod of the apron plate oil cylinder 500 is quickly separated from the control when the pressure is suppressed, and the apron plate can freely stretch out and retract, so that the apron plate can continue to work, and when the machine is normally stopped after the completion of the subsequent production work, the machine goes to maintenance again, thereby preventing the error production caused by the faults of the individual apron plate oil cylinder 500.
Moreover, when the apron cylinder 500 needs to be locked at a high position, the first stop valve 710 can be closed, the rodless cavity 510 and the rod cavity 520 are respectively sealed through the hydraulic control one-way valve 800 and the proportional valve 300, so that the apron cylinder 500 is locked at the high position for a long time and does not fall down, and the second stop valve 720 and the third stop valve 730 can be closed, so that the problem that the apron cylinder 500 is blocked when the apron cylinder 500 is blocked in a full-open state or a half-open and half-closed state is solved better.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a skirtboard hydro-cylinder lift control system which characterized in that includes:
the oil supply device is provided with a proportional valve;
the first oil way is connected with the proportional valve and a rodless cavity of the apron plate oil cylinder;
the second oil way is connected with the proportional valve and a rod cavity of the apron plate oil cylinder;
the first pressure detection device is arranged on the first oil way and used for detecting the pressure value of the first oil way;
the second pressure detection device is arranged on the second oil way and used for detecting the pressure value of the second oil way;
a third oil passage connecting the first oil passage and the second oil passage;
the first stop valve is arranged in the third oil way and is electrically connected with the first pressure detection device and the second pressure detection device, the first pressure detection device and the second pressure detection device immediately send signals to the first stop valve when detecting that the pressure value is abnormally increased, the first stop valve can be opened in response to detection results fed back by the first pressure detection device and the second pressure detection device, and the rod cavity and the rodless cavity are communicated through the first oil way, the third oil way and the second oil way, so that a piston rod of the apron plate oil cylinder can freely stretch and retract, and the apron plate oil cylinder can be processed under the condition that an oil cylinder apron plate lifting control system does not stop.
2. The skirt unit lift control system of claim 1, further comprising:
the second stop valve is arranged in the first oil way and is positioned between the connection end of the first oil way and the third oil way and the proportional valve;
and the third stop valve is arranged on the second oil way and is positioned between the connection end of the second oil way and the third oil way and the proportional valve.
3. The skirt cylinder lift control system according to claim 2, wherein the second stop valve is electrically connected to the first pressure detection device and the second pressure detection device, and the third stop valve is electrically connected to the first pressure detection device and the second pressure detection device;
the second and third stop valves are each capable of closing in response to detection results fed back by the first and second pressure detection means.
4. The skirt cylinder lift control system of claim 1, wherein the first pressure detecting means and the second pressure detecting means are pressure relays, respectively.
5. The skirt cylinder lift control system of claim 1, further comprising a pilot operated check valve, wherein the proportional valve connects the first oil passage and the second oil passage through the pilot operated check valve.
6. The skirt cylinder lift control system of claim 5, wherein the proportional valve is a Y-type mid-position function proportional valve.
7. The apron cylinder lifting control system of claim 1, wherein the oil supply device further comprises a pressure line and an oil return line, and the pressure line and the oil return line are respectively connected with the proportional valve; and a fourth stop valve is arranged on the pressure pipeline, and a one-way valve is arranged on the oil return pipeline.
8. The skirt cylinder lift control system of claim 7, wherein the pressure line is provided with a first pressure tap.
9. The skirt cylinder lift control system of claim 7, wherein a second pressure tap is provided on the return line.
10. A skirting board, wherein a plurality of skirting board cylinders are connected to the skirting board, and each skirting board cylinder is provided with the skirting board cylinder lifting control system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010892849.XA CN112032128B (en) | 2020-08-28 | 2020-08-28 | Apron board oil cylinder lifting control system and apron board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010892849.XA CN112032128B (en) | 2020-08-28 | 2020-08-28 | Apron board oil cylinder lifting control system and apron board |
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| CN112032128A CN112032128A (en) | 2020-12-04 |
| CN112032128B true CN112032128B (en) | 2022-07-29 |
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| CN205918674U (en) * | 2016-07-18 | 2017-02-01 | 江苏泰富兴澄特殊钢有限公司 | Stack meets hydraulic control system of material collection |
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2020
- 2020-08-28 CN CN202010892849.XA patent/CN112032128B/en active Active
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| CN101413522A (en) * | 2008-11-14 | 2009-04-22 | 浙江大学 | Independent electrohydraulic load sensitive energy regeneration hydraulic system of engineering machinery load port |
| CN202851480U (en) * | 2012-09-20 | 2013-04-03 | 天津市中重科技工程有限公司 | Cooling bed skirting board hydraulic control device |
| CN104088827A (en) * | 2014-07-17 | 2014-10-08 | 常州爱普超高压液压***有限公司 | Hydraulic overturning device for pontoon bridge gangplank |
| CN104132020A (en) * | 2014-07-17 | 2014-11-05 | 常州爱普超高压液压***有限公司 | Hydraulic valve set for pontoon bridge gangplank hydraulic overturning device |
| CN105715597A (en) * | 2016-03-18 | 2016-06-29 | 中冶赛迪工程技术股份有限公司 | Constant-backpressure direct drive type electro hydraulic servo system and control method thereof |
| CN105645324A (en) * | 2016-04-18 | 2016-06-08 | 湖南五新隧道智能装备股份有限公司 | Cantilever crane motion hydraulic system and tunnel lagging jack operating vehicle |
| CN205918674U (en) * | 2016-07-18 | 2017-02-01 | 江苏泰富兴澄特殊钢有限公司 | Stack meets hydraulic control system of material collection |
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