CN112121481B - Full-automatic protection method and system for open-close plates of filter press - Google Patents
Full-automatic protection method and system for open-close plates of filter press Download PDFInfo
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- CN112121481B CN112121481B CN202011065034.0A CN202011065034A CN112121481B CN 112121481 B CN112121481 B CN 112121481B CN 202011065034 A CN202011065034 A CN 202011065034A CN 112121481 B CN112121481 B CN 112121481B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
- B01D25/007—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration by pressure measuring
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Abstract
The invention provides a full-automatic protection method and a system for an open-close board of a filter press, wherein the method comprises the following steps: when the filter press is identified to have a plate combination/plate opening requirement, controlling an oil pump of a filter press system and related valves of a plate combination/plate opening to operate based on parameters of axial force of a filter plate suspension rod, plate combination pressure and pressing pressure of the filter press monitored in real time, so that the filter press can meet the set plate combination/plate opening condition and then realize the operation of the plate combination of the filter press; wherein, plywood/open plate's relevant valve includes: pressure relief valve, closing plate valve, overflow valve, opening plate valve and relief valve. By adopting the scheme of the invention, the automatic operation of the plate closing and opening procedures of the filter press can be realized, the states of all equipment or structures can be automatically detected, monitored and protected, the automatic plate closing and opening system can respond in time when a fault occurs, the reliability is ensured, the fault removal efficiency is improved, the dependence of the plate opening and closing operation process on manpower and material resources is overcome, and the intelligence and the timeliness of the operation of the filter press are obviously improved.
Description
Technical Field
The invention relates to the technical field of operation and maintenance of filter presses, in particular to a full-automatic protection method and system for an open-close plate of a filter press.
Background
As a widely used filter press apparatus, a filter press is generally composed of: the frame part, the hydraulic part, the filter plate and filter cloth part and the electric control system. But because the device belongs to a traditional device, the automation degree is low in the operation process, the failure rate is high, and the use requirement of modern industry on the device is difficult to meet. In actual operation, the plywood pressure generated by the oil cylinder of the filter press powered by a hydraulic system can reach 20-30MPa, the push plate force can reach 300-400t, and the operation faults caused by insufficient oil pressure or bending of a filter plate suspension guide rod, no action of plywood opening and improper plywood opening easily occur only by the conventional control mechanism.
Disclosure of Invention
In order to solve the above problems, the present invention provides a fully automatic protection method for an open-close board of a filter press, which in one embodiment comprises: identifying operational requirements of the filter press;
when the filter press has the plate combination/plate opening requirement, an oil pump of a filter press system and related valves of a plate combination/plate opening are controlled to operate based on a real-time filter plate suspension rod axial force monitoring value, a plate combination pressure monitoring value and a pressing pressure monitoring value of the filter press, so that the filter press meets the set plate combination/plate opening condition, and the plate combination/plate opening operation of the filter press is realized;
wherein, the relevant valve of plywood/division board includes: pressure relief valve, closing plate valve, overflow valve, opening plate valve and relief valve.
In one embodiment, when the filter press has plywood requirements, control is performed by:
step A1, controlling an oil pump, an overflow valve and a plywood valve of the filter pressing system to be opened;
step A2, judging whether the current axial force monitoring value of the filter plate suspension rod meets the first plywood permission condition, if not, controlling an overflow valve to be closed, opening a pressure relief valve, controlling related valves to operate according to the real-time plywood pressure monitoring value, the axial force monitoring value of the filter plate suspension rod and the pressing pressure monitoring value to realize plywood adjustment until the axial force monitoring value of the filter plate suspension rod of the filter press meets the first plywood permission condition, and entering step A3;
step A3, when the pressure monitoring value of the pressure filter meets the second plywood permission condition, controlling the overflow valve to close and the pressure relief valve to open;
and step A4, when the press fit pressure monitoring value of the press filter meets the third plywood permission condition, controlling the pressure relief valve to be closed, the plywood valve to be closed and the oil pump to be closed, and realizing plywood operation of the press filter.
In one embodiment, in the step a1, the method further includes:
and after the oil pump, the overflow valve and the plywood valve are opened, calculating the operation times of the plywood, judging whether the accumulated times of the plywood reaches a set time threshold value, and if so, giving an alarm.
In one embodiment, in step a2, the process of controlling the operation of the associated valve to achieve the plywood adjustment includes the following operations:
when the real-time plywood pressure monitoring value of the filter press meets the pressure relief pressure set value or less, the pressure relief valve and the plywood valve are controlled to be closed, and the overflow valve and the plywood opening valve are controlled to be opened;
judging whether the real-time monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened;
and when the real-time pressing pressure monitoring value of the filter press meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate opening valve to be closed, opening the overflow valve and the plate closing valve, and executing the step A2 again.
In one embodiment, when the filter press has an open plate requirement, control is performed by:
b1, controlling the pressure relief valve to be opened, monitoring the state of the pressure relief valve in real time, controlling the pressure relief valve to be opened when the state of the pressure relief valve reaches a set position within set time, and otherwise, alarming;
step B2, when the monitoring value of the pressing pressure meets the first opening plate allowance condition, controlling an oil pump, an overflow valve and an opening plate valve of the filter pressing system to open;
step B3, judging whether the axial force monitoring value of the filter plate suspension rod meets a second plate opening allowance condition, if not, controlling an overflow valve to be closed, opening a pressure relief valve, controlling related valves to operate according to the real-time axial force monitoring value of the filter plate suspension rod and a pressing pressure monitoring value to realize plate opening adjustment, and entering the step B4 until the axial force monitoring value of the filter plate suspension rod of the filter press meets the second plate opening allowance condition;
step B4, when the plate opening state reaches the set position, controlling the oil pump and the overflow valve to close, and opening the pressure relief valve;
and step B5, when the press fit pressure monitoring value meets the third plate opening allowance condition, controlling the pressure relief valve and the plate opening valve to be closed, and realizing the plate opening operation of the filter press.
In one embodiment, in the step B3, the process of controlling the operation of the relevant valve to realize the opening adjustment includes the following operations:
when the press-fit pressure monitoring value meets the set pressure relief value, controlling the pressure relief valve and the plate opening valve to close, and controlling the overflow valve and the plate opening valve to open;
judging whether the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened when the pressure monitoring value of the plywood plate meets the set value of the pressure of the plywood plate or more;
and when the press fit pressure monitoring value meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate closing valve to be closed, and controlling the overflow valve and the plate opening valve to be opened, and executing the step B3 again.
In one embodiment, in step B2, the method further includes:
and after the oil pump, the overflow valve and the plate opening valve are opened, calculating the plate opening operation times, judging whether the accumulated plate opening times reach a set time threshold value, and if so, giving an alarm.
In one embodiment, the method further comprises:
and the acquired axial force monitoring value of the filter plate suspension rod, the acquired pressure monitoring value of the plywood and the acquired data of the pressure monitoring value of the pressing pressure are displayed and stored in a correlation manner with time information so as to be checked, called and analyzed by a user.
In one embodiment, when alarming, the following steps are executed: controlling the filter press to pause, outputting an alarm prompt signal corresponding to the fault data, and reminding workers to intervene to remove the fault; wherein the fault data includes information on the faulty component and the operating status of the current filter press.
In accordance with still further aspects of any one or more of the above embodiments, the present invention provides a fully automated protective system for open-close plates of a filter press, which performs the method and steps of any one or more of the above embodiments.
Compared with the closest prior art, the invention also has the following beneficial effects:
the invention provides a full-automatic protection method and a system for an open-close board of a filter press, wherein the method comprises the following steps: identifying the operation requirement of the filter press, and determining whether the filter press has the operation requirement of an open-close plate or not by judging the current operation situation of a filter press system to which the filter press belongs, so as to avoid the influence of blind starting of the open-close plate or the open-close plate operation on other equipment or processes of the filter press system; furthermore, the invention controls the automatic operation of an oil pump and a plywood/open plate of the filter press system based on real-time monitoring parameters such as a filter plate suspension rod axial force monitoring value, a plywood pressure monitoring value, a pressing pressure monitoring value and the like of the filter press according to a process control strategy, thereby providing reliability guarantee for the plywood/open plate operation of the filter press on the basis, automatically detecting, monitoring and protecting the state of each device or structure, responding in time when a fault occurs, improving the efficiency of removing the fault, basically liberating the dependence of the open plate plywood operation of the filter press on manpower and material resources, obviously improving the intelligence and the timeliness of the operation of the filter press, and being beneficial to the optimization and the development of the operation technology of the filter press.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a simplified model for process control of a filter press according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a fully automatic protection method for open-close plates of a filter press according to an embodiment of the present invention;
FIG. 3 is a flowchart of an automatic plywood control process for the full-automatic plywood protection method of the filter press according to the embodiment of the invention;
FIG. 4 is a flowchart of an automatic open plate control process of the full-automatic open plate protection method for the open plate of the filter press according to the embodiment of the present invention;
fig. 5 is a schematic structural view of a fully automatic protection system for an open-close board of a filter press according to another embodiment of the present invention.
Detailed Description
The following detailed description will be provided for the embodiments of the present invention with reference to the accompanying drawings and examples, so that the practitioner of the present invention can fully understand how to apply the technical means to solve the technical problems, achieve the technical effects, and implement the present invention according to the implementation procedures. It should be noted that, unless otherwise conflicting, the embodiments and features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
As a widely used filter press apparatus, a filter press is generally composed of: the frame part, the hydraulic part, the filter plate and filter cloth part and the electric control system. But because the device belongs to a traditional device, the automation degree is low in the operation process, the failure rate is high, and the use requirement of modern industry on the device is difficult to meet. In actual operation, the plywood pressure generated by the oil cylinder of the filter press powered by a hydraulic system can reach 20-30MPa, the push plate force can reach 300-400t, and operation faults caused by insufficient oil pressure or bending of a filter plate suspension guide rod, no action of plywood opening, improper plywood opening and the like easily occur based on the conventional control mechanism.
In order to solve the operation faults caused by insufficient oil pressure, bent filter plate hanging guide rods, no action of plate opening of a plate combination plate, improper plate opening of the plate combination plate and the like during actual operation and effectively improve the automation degree and the stable operation capacity of the equipment, the invention particularly relies on the idea of process control to an intelligent automatic control system to realize the full-automatic control and protection of the plate opening and closing of the filter press.
Process control is an automatic control system that allows the parameters characterizing a production process to be controlled quantities, either close to a set value or within a set range. The term "production process" as used herein refers to the interaction and conversion of matter and energy in a production plant or apparatus. The main parameters characterizing the process are temperature, pressure, flow, level, composition, concentration, etc.
By controlling the process parameters, the yield of the product in the production process can be increased, the quality can be improved, and the energy consumption can be reduced. Process control systems typically take the form of feedback control, which is the primary means of process control. In practical application, a sensor acquires parameters of the controlled equipment in the operation process, a set controller adjusts the parameters according to the acquisition result of the sensor, the values of the parameters meet a desired value (set value) and can be one or more specified values or specified ranges, and then the adjusted parameters are input to the controlled equipment through an actuator to serve as control parameters of the controlled equipment in operation. This control was applied to a simple model built into the filter press control system, as shown in figure 1.
Specifically, aiming at filter press equipment, sensors such as a hydraulic station oil tank liquid level meter, an oil cylinder pressure sensor, an oil tank thermometer, a filter plate suspension guide rod axial force sensor and the like are arranged in a filter press, and meanwhile, a plate opening in-place limit switch is arranged. Based on the above, the present invention provides a full-automatic protection method and system for open-close plates of a filter press, and various embodiments of the present invention are described below with reference to the accompanying drawings.
Example one
Fig. 2 is a schematic flow chart illustrating a fully automatic protection method for open-close boards of a filter press according to an embodiment of the present invention, and as can be seen from fig. 2, the method includes the following steps.
And S110, identifying the operation requirement of the filter press. In this step, in order to determine whether the opening-closing plate operation needs to be automatically performed at the present pressure filter, and specifically what kind of operation process needs to be automatically performed, after the automatic operation requirement to be performed is identified, the method or step in S120 is further performed.
And S120, when the filter press has a plate combination/plate opening requirement, controlling an oil pump of the filter press system and related valves of a plate combination/plate opening to operate based on a real-time filter plate suspension rod axial force monitoring value, a plate combination pressure monitoring value and a pressing pressure monitoring value of the filter press, so that the filter press meets the set plate combination/plate opening condition, and the plate combination/plate opening operation of the filter press is realized.
Wherein, the relevant valve of plywood/division board includes: pressure relief valve, closing plate valve, overflow valve, opening plate valve and relief valve.
Specifically, fig. 3 shows a flow chart of an automatic plywood control process for a full-automatic plywood protection method for a filter press according to an embodiment of the present invention, as shown in fig. 3, and in one embodiment, when the filter press has plywood requirements, the control is performed by:
and step A1, controlling an oil pump, an overflow valve and a plywood valve of the filter pressing system to open.
Step A2, judging whether the current axial force monitoring value of the filter plate suspension rod meets the first plywood permission condition, if not, controlling the overflow valve to be closed, opening the pressure relief valve, controlling the relevant valves to operate according to the real-time plywood pressure monitoring value, the axial force monitoring value of the filter plate suspension rod and the pressing pressure monitoring value to realize plywood adjustment until the axial force monitoring value of the filter plate suspension rod of the filter press meets the first plywood permission condition, and entering step A3. When the axial force monitoring value of the current filter plate suspension rod of the filter press is determined to be less than or equal to the set value, the axial force of the current filter plate suspension rod of the filter press meets the allowance condition of the first plywood, otherwise, the axial force does not meet the allowance condition of the first plywood.
And step A3, when the pressure monitoring value of the pressure filter meets the second plywood allowable condition, controlling the overflow valve to be closed and the pressure relief valve to be opened. In practical application, the press fit pressure monitoring value of the press filter is continuously obtained in real time and is compared with the plywood pressure set value until the press fit pressure monitoring value of the press filter is determined to be greater than or equal to the plywood pressure set value, and the press fit pressure monitoring value of the press filter meets the second plywood allowable condition.
And step A4, when the press fit pressure monitoring value of the press filter meets the third plywood permission condition, controlling the pressure relief valve to be closed, the plywood valve to be closed and the oil pump to be closed, and realizing plywood operation of the press filter. In practical application, the pressing pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value until the pressing pressure monitoring value of the filter press is determined to be less than or equal to the pressure relief pressure set value, and the pressing pressure monitoring value of the filter press meets the allowable conditions of the third plywood.
Further, in one embodiment, in step a2, the process of controlling the operation of the associated valve to effect the adjustment of the plywood includes the following operations:
when the real-time plywood pressure monitoring value of the filter press meets the pressure relief pressure set value or less, the pressure relief valve and the plywood valve are controlled to be closed, and the overflow valve and the plywood valve are controlled to be opened.
And judging whether the real-time monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling the overflow valve to be closed and the pressure relief valve to be opened.
And when the real-time pressing pressure monitoring value of the filter press meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate opening valve to be closed, opening the overflow valve and the plate closing valve, and executing the step A2 again.
In one embodiment, a real-time plywood pressure monitoring value of the filter press is continuously obtained in real time and is compared with a pressure relief pressure set value until the pressure relief pressure monitoring value is determined to be less than or equal to the pressure relief pressure set value, the pressure relief valve is controlled to be closed, the plywood valve is controlled to be closed, the overflow valve is controlled to be opened, the plywood valve is controlled to be opened, the real-time filter plate suspension rod axial force monitoring value is obtained, and the next operation is executed.
Next, judging whether the current axial force monitoring value of the filter plate suspension rod of the filter press exceeds the axial force setting value of the filter plate suspension rod, if so, indicating that the current axial force of the filter plate suspension rod of the filter press still does not meet the first plywood allowable condition, at the moment, alarming is needed to prompt staff to intervene, if the current axial force monitoring value of the filter plate suspension rod of the filter press does not exceed the axial force setting value of the filter plate suspension rod, indicating that the current axial force of the filter plate suspension rod of the filter press can meet the first plywood allowable condition after adjustment, controlling an overflow valve to be closed, opening a pressure relief valve, and executing subsequent operation;
in one embodiment, the real-time pressing pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value until the pressure relief pressure monitoring value is determined to meet the pressure relief pressure set value and is less than or equal to the pressure relief pressure set value, the pressure relief valve and the plate opening valve are controlled to be closed, and the overflow valve and the plate closing valve are opened.
In the embodiment, in order to ensure that the axial force monitoring value of the filter plate suspension rod of the filter press meets the allowable condition of the first plate after the series of operations are completed, the step A2 is executed again to judge the axial force monitoring value of the filter plate suspension rod again, so that the condition that the axial force of the filter plate suspension rod is unqualified possibly caused by multi-link operation is avoided to a great extent, and the operation reliability and the accuracy of the plate of the filter press are improved.
Specifically, in an embodiment, in the step a1, the method further includes:
and after the oil pump, the overflow valve and the plywood valve are opened, calculating the operation times of the plywood, judging whether the accumulated times of the plywood reaches a set time threshold value, and if so, giving an alarm. The operation in each embodiment of the invention is automatic operation to realize plate combination control of the filter press, in order to avoid that plate combination trial times in a set time period of the filter press are too frequent after a fault is known, the plate combination times threshold value is set in the embodiment of the invention, when the automatic plate combination is started, an oil pump, an overflow valve and a plate combination valve are opened, the plate combination operation times are accumulated, whether the accumulated plate combination times reach the set times threshold value is judged, and if yes, an alarm is given; if not, the current accumulated plywood times does not exceed the set times threshold value and is within the acceptable plywood times range, so the operation of the current plywood protection is continuously executed. The scheme can also avoid resource loss and faults caused by repeated redundant operation in the process of protecting and operating the plywood to a certain extent.
Specifically, fig. 4 shows a flowchart of an automatic open plate control process of the full-automatic open plate protection method for the open plate of the filter press according to the embodiment of the present invention, as shown in fig. 4, in one embodiment, when it is determined that the filter press has an open plate requirement, the control is performed by the following steps:
and step B1, controlling the opening of the pressure relief valve, monitoring the state of the pressure relief valve in real time, controlling the opening of the pressure relief valve when the state of the pressure relief valve reaches a set position within set time, and otherwise, alarming.
And step B2, controlling an oil pump, an overflow valve and a plate opening valve of the filter pressing system to open when the monitoring value of the pressing pressure meets the first plate opening allowance condition. In practical application, the pressing pressure monitoring value of the filter press is continuously collected in real time and judged until the pressing pressure monitoring value is smaller than the pressure relief pressure set value, the pressing pressure monitoring value of the filter press meets the first plate opening allowing condition, and an oil pump, an overflow valve and a plate opening valve of the filter press system are controlled to be opened.
And B3, judging whether the axial force monitoring value of the filter plate suspension rod meets a second plate opening allowance condition, if not, controlling the overflow valve to be closed, opening the pressure relief valve, closing the plate opening valve, controlling the relevant valves to operate according to the real-time axial force monitoring value of the filter plate suspension rod and the pressing pressure monitoring value to realize plate opening adjustment until the axial force monitoring value of the filter plate suspension rod of the filter press meets the second plate opening allowance condition, and entering the step B4. When the axial force monitoring value of the filter plate suspension rod is determined to be smaller than or equal to a set value, the axial force monitoring value of the filter plate suspension rod of the filter press meets a second plate opening permission condition, and otherwise, the axial force monitoring value of the filter plate suspension rod does not meet the second plate opening permission condition.
And step B4, when the opening state reaches the set position, controlling the oil pump and the overflow valve to be closed, and opening the pressure relief valve. Specifically, the plate opening state of the filter press is continuously obtained in real time until the plate opening state is determined to reach a set position, the oil pump is controlled to be closed, the overflow valve is controlled to be closed, and the pressure relief valve is controlled to be opened. In practical application, the real-time plate opening state data of the filter press is obtained through the plate opening in-place limit switch in the filter press.
And step B5, when the press fit pressure monitoring value meets the third plate opening allowance condition, controlling the pressure relief valve to close, realizing the plate opening operation of the filter press, in practical application, continuously acquiring the press fit pressure monitoring value of the filter press in real time and comparing the press fit pressure monitoring value with the pressure relief pressure set value until the press fit pressure monitoring value of the filter press is determined to be less than or equal to the pressure relief pressure set value, indicating that the press fit pressure monitoring value of the filter press meets the third plate opening allowance condition, controlling the pressure relief valve to close, closing the plate opening valve, completing the plate opening and issuing prompt information.
Further, in one embodiment, in step B3, the process of controlling the operation of the relevant valve to realize the opening adjustment includes the following operations:
when the press-fit pressure monitoring value meets the set pressure relief value, controlling the pressure relief valve and the plate opening valve to close, and controlling the overflow valve and the plate opening valve to open; specifically, the pressing pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value, and the pressure relief valve and the plate opening valve are controlled to be closed, and the overflow valve and the plate opening valve are controlled to be opened until the pressing pressure monitoring value is determined to be less than or equal to the pressure relief pressure set value.
Judging whether the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened when the pressure monitoring value of the plywood meets the set value of the pressure of the plywood; in the step, when the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, the fact that the axial force of the filter plate suspension rod of the filter press still does not meet a second opening plate allowable condition is indicated, at the moment, an alarm needs to be given, otherwise, the fact that the axial force of the filter plate suspension rod of the filter press can meet the second opening plate allowable condition after adjustment is indicated, then follow-up operation is executed to judge whether the pressure monitoring value of the plywood plate meets the set condition or not, specifically, the pressure monitoring value of the plywood plate of the filter press is continuously obtained in real time and compared with the pressure set value of the plywood plate, and when the pressure monitoring value of the plywood plate is determined to be greater than or equal to the pressure set value of the plywood plate, an overflow valve is controlled to be closed, and the pressure relief valve is opened.
And further, when the lamination pressure monitoring value is less than or equal to the pressure relief pressure set value, controlling the pressure relief valve and the plywood valve to close, and controlling the overflow valve and the plywood valve to open, and executing the step B3 again, wherein in the step, the lamination pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value until the lamination pressure monitoring value is determined to be less than or equal to the pressure relief pressure set value, the pressure relief valve and the plywood valve are controlled to close, the overflow valve and the plywood valve are controlled to open, and the step B3 is executed again.
In this embodiment, in order to ensure that the axial force monitoring value of the filter plate suspension rod of the filter press meets the second opening allowance condition after a series of adjustment actions are performed, the step B3 is performed again to detect the axial force monitoring value of the filter plate suspension rod again, so that the axial force change of the filter plate suspension rod, which may be caused by multi-link operation, is avoided to a considerable extent, and the opening operation reliability and accuracy of the filter press are improved.
Further, in one embodiment, in step B2, the method further includes:
and after the oil pump, the overflow valve and the plate opening valve are opened, calculating the plate opening operation times, judging whether the accumulated plate opening times reach a set time threshold value, and if so, giving an alarm. In the embodiment, a plate opening time threshold value is set, when an automatic plate opening program is started, specifically, after an oil pump, an overflow valve and a plate opening valve are controlled to be opened, the current plate opening operation time is increased by one, whether the accumulated plate opening time reaches the set time threshold value or not is judged, and if yes, an alarm is given; if not, the current accumulated board opening times do not exceed the set time threshold and are within the acceptable board opening times range, so that the operation of the current board opening protection is continuously executed. By adopting the scheme, the problem that the plate opening attempt times are too frequent in the set time period of the filter press after the known fault exists can be avoided, the resource loss and the fault caused by repeated redundant operation in the plate opening operation process can be avoided to a certain extent, and the service life of each related structure is prolonged.
In one embodiment, the method further comprises:
and the acquired axial force monitoring value of the filter plate suspension rod, the acquired pressure monitoring value of the plywood and the acquired data of the pressure monitoring value of the pressing pressure are displayed and stored in a correlation manner with time information so as to be checked, called and analyzed by a user. The method provides a way for users to check and call data in real time, and is helpful for the users to realize the optimization and management of the operation scheme of the open-close plate of the filter press or each component of the filter press by analyzing the recorded data.
Specifically, in one embodiment, when alarming, the following steps are executed: controlling the filter press to pause, outputting an alarm prompt signal corresponding to the fault data, and reminding workers to intervene to remove the fault; wherein the fault data includes information on the faulty component and the operating status of the current filter press. In the embodiment, when the alarm information is output to remind the worker of removing the fault, the fault position information of the filter press and the current fault operation message are output to the worker, so that the worker can be helped to accurately match with a proper maintenance worker, and the timeliness and the success rate of removing the fault can be improved by the maintenance worker according to the obtained information.
In practical application, the method for automatically controlling the opening and closing plate of the filter press can also acquire the operation data of related components of the filter press through the oil tank liquid level meter, the oil cylinder pressure sensor and the oil tank thermometer of the hydraulic station, and alarm is given when the operation data is abnormal, so that the interlocking abnormality caused by the fact that local abnormality is not solved in time is avoided.
The technical scheme of the embodiment of the invention is based on a process control strategy, the automatic control of the operation of the open-close board of the filter press is realized in a feedback control mode, and each operation in the open-close board process of the filter press is subjected to standard control by monitoring the axial force of the filter plate suspension guide rod, the pressing pressure value and the board pressure value obtained in real time, so that the states of all devices or structures related to the open-close board process of the filter press can be detected, monitored and protected by an automatic control system; when a fault occurs, the pressure filter and the running system where the pressure filter is located can be responded to the first time, the pressure filter and the running system where the pressure filter is located are protected to the greatest extent, the working condition where the pressure filter is located is in a safe and stable running state, meanwhile, the running efficiency of the opening and closing plates of the pressure filter is greatly improved, and the running time and the consumption of manpower and material resources are saved.
Example two
In view of other aspects of any one or more of the embodiments described above, the present invention also provides a fully automatic protection system for an open-close plate of a filter press. The system performs the method or steps described in any one or more of the embodiments above. Fig. 5 is a schematic structural diagram showing a fully automatic protection system for an opening and closing plate of a filter press according to an embodiment of the present invention, and the structure of the system will be described with reference to information in fig. 5.
An operational requirement identification module 51 configured to identify operational requirements of the filter press. In this step, in order to determine whether the current filter press needs to automatically execute the operation and specifically what kind of operation process needs to be automatically executed by the operation requirement identification module, after the automatic operation requirement to be executed is identified and determined, the method or step in S120 is further executed.
And the automatic plywood/plywood-open control module 53 is configured to control an oil pump of the filter press system and related valves of plywood/plywood-open to operate based on a real-time filter plate suspension rod axial force monitoring value, a plywood pressure monitoring value and a pressing pressure monitoring value of the filter press when the filter press has a plywood/plywood-open requirement, so that the filter press can realize the operation of plywood of the filter press after meeting the set plywood/plywood-open condition.
Wherein, the relevant valve of plywood/division board includes: pressure relief valve, closing plate valve, overflow valve, opening plate valve and relief valve.
And the data management module 55 is configured to display and store the acquired axial force monitoring value of the filter plate suspension rod, the acquired pressure monitoring value of the plywood and the acquired data of the pressure monitoring value of the pressing force in association with the time information, so that a user can view, call and analyze the values. The method provides a way for users to check and call data in real time, and is helpful for the users to realize the optimization and management of the operation scheme of the open-close board of the filter press or each component of the filter press by analyzing the data.
Further, the ply/cut board automatic control module 53 can be divided into a ply board automatic control unit and a cut board automatic control unit, and in one embodiment, when the filter press has ply demand, the ply board automatic control unit performs control by:
and step A1, controlling an oil pump, an overflow valve and a plywood valve of the filter pressing system to open.
Step A2, judging whether the current axial force monitoring value of the filter plate suspension rod meets the first plywood allowable condition, if not, controlling the overflow valve to be closed, closing the plywood valve, opening the pressure relief valve, controlling the relevant valves to operate according to the real-time plywood pressure monitoring value, the axial force monitoring value of the filter plate suspension rod and the pressing pressure monitoring value to realize plywood adjustment, and entering the step A3 until the axial force monitoring value of the filter plate suspension rod of the filter press meets the first plywood allowable condition. When the axial force monitoring value of the current filter plate suspension rod of the filter press is determined to be less than or equal to the set value, the axial force of the current filter plate suspension rod of the filter press meets the allowance condition of the first plywood, otherwise, the axial force does not meet the allowance condition of the first plywood.
And step A3, when the pressure monitoring value of the pressure filter meets the second plywood allowable condition, controlling the overflow valve to be closed and the pressure relief valve to be opened. In practical application, the press fit pressure monitoring value of the press filter is continuously obtained in real time and is compared with the plywood pressure set value until the press fit pressure monitoring value of the press filter is determined to be greater than or equal to the plywood pressure set value, and the press fit pressure monitoring value of the press filter meets the second plywood allowable condition.
And step A4, when the press fit pressure monitoring value of the press filter meets the third plywood permission condition, controlling the pressure relief valve to be closed, the plywood valve to be closed and the oil pump to be closed, and realizing plywood operation of the press filter. In practical application, the pressing pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value until the pressing pressure monitoring value of the filter press is determined to be less than or equal to the pressure relief pressure set value, and the pressing pressure monitoring value of the filter press meets the allowable conditions of the third plywood.
Further, in one embodiment, in step A2, the automatic plywood control unit controls the operation of the associated valves to effect the adjustment of the plywood, including the operations of:
and when the real-time plywood pressure monitoring value of the filter press meets the pressure relief pressure set value or less, controlling the pressure relief valve to be closed, and controlling the overflow valve and the plate opening valve to be opened.
And judging whether the real-time monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling the overflow valve to be closed and the pressure relief valve to be opened.
And when the real-time pressing pressure monitoring value of the filter press meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate opening valve to be closed, opening the overflow valve and the plate closing valve, and executing the step A2 again.
In one embodiment, the automatic plywood control unit continuously acquires a real-time plywood pressure monitoring value of the filter press in real time and compares the real-time plywood pressure monitoring value with a pressure relief pressure set value until the pressure relief pressure set value is determined to be less than or equal to the pressure relief pressure set value, the pressure relief valve is controlled to be closed, the plywood valve is controlled to be closed, the overflow valve is controlled to be opened, the plywood valve is controlled to be opened, the real-time filter plate suspension rod axial force monitoring value is acquired, and the next operation is executed.
Next, judging whether the current axial force monitoring value of the filter plate suspension rod of the filter press exceeds the axial force setting value of the filter plate suspension rod, if so, indicating that the current axial force of the filter plate suspension rod of the filter press still does not meet the first plywood allowable condition, at the moment, alarming is needed to prompt staff to intervene, if the current axial force monitoring value of the filter plate suspension rod of the filter press does not exceed the axial force setting value of the filter plate suspension rod, indicating that the current axial force of the filter plate suspension rod of the filter press can meet the first plywood allowable condition after adjustment, controlling an overflow valve to be closed, opening a pressure relief valve, and executing subsequent operation;
in one embodiment, a real-time pressing pressure monitoring value of the filter press is continuously obtained in real time by the automatic plywood control unit and is compared with a pressure relief pressure set value until the pressure relief pressure monitoring value is determined to meet the pressure relief pressure set value and is less than or equal to the pressure relief pressure set value, the pressure relief valve and the plate opening valve are controlled to be closed, and the overflow valve and the plate closing valve are opened.
In this embodiment, in order to ensure that the axial force monitoring value of the filter plate suspension rod of the filter press meets the allowable condition of the first closing plate after the series of operations are completed, the step a2 is executed again to re-determine the axial force monitoring value of the filter plate suspension rod, so that unqualified axial force changes of the filter plate suspension rod, which may be caused by the multi-link operations, are avoided to a considerable extent, and the operational reliability and accuracy of the closing plate of the filter press are improved.
Specifically, in one embodiment, the automatic plywood control unit is further configured to:
in step a1, after the oil pump, the relief valve and the plywood valve are opened, the automatic plywood control unit calculates the number of times of plywood operation, and determines whether the accumulated number of times of plywood reaches a set number threshold, and if so, an alarm is given. The operation in each embodiment of the invention is automatic operation to realize plate combination control of the filter press, in order to avoid that plate combination trial times in a set time period of the filter press are too frequent after a fault is known, the plate combination times threshold value is set in the embodiment of the invention, when the automatic plate combination is started, an oil pump, an overflow valve and a plate combination valve are opened, the plate combination operation times are accumulated, whether the accumulated plate combination times reach the set times threshold value is judged, and if yes, an alarm is given; if not, the current accumulated plywood times does not exceed the set times threshold value and is within the acceptable plywood times range, so the operation of the current plywood protection is continuously executed. The scheme can also avoid resource loss and faults caused by repeated redundant operation in the operation process of the plywood to a certain extent.
In one embodiment, when it is determined that the filter press has an open plate requirement, the control is performed by the open plate automatic control unit by:
and step B1, controlling the opening of the pressure relief valve, monitoring the state of the pressure relief valve in real time, controlling the opening of the pressure relief valve when the state of the pressure relief valve reaches a set position within set time, and otherwise, alarming.
And step B2, controlling an oil pump, an overflow valve and a plate opening valve of the filter pressing system to open when the monitoring value of the pressing pressure meets the first plate opening allowance condition. In practical application, the pressing pressure monitoring value of the filter press is continuously collected in real time and judged until the pressing pressure monitoring value is smaller than the pressure relief pressure set value, the pressing pressure monitoring value of the filter press meets the first plate opening allowing condition, and an oil pump, an overflow valve and a plate opening valve of the filter press system are controlled to be opened.
And B3, judging whether the axial force monitoring value of the filter plate suspension rod meets a second plate opening allowance condition, if not, controlling the overflow valve to be closed, closing the plate opening valve, opening the pressure relief valve, controlling the relevant valves to operate according to the real-time axial force monitoring value of the filter plate suspension rod and the pressing pressure monitoring value to realize plate opening adjustment until the axial force monitoring value of the filter plate suspension rod of the filter press meets the second plate opening allowance condition, and entering the step B4. When the axial force monitoring value of the filter plate suspension rod is determined to be smaller than or equal to a set value, the axial force monitoring value of the filter plate suspension rod of the filter press meets a second plate opening permission condition, and otherwise, the axial force monitoring value of the filter plate suspension rod does not meet the second plate opening permission condition.
And step B4, when the opening state reaches the set position, controlling the oil pump and the overflow valve to be closed, and opening the pressure relief valve. Specifically, the plate opening state of the filter press is continuously obtained in real time until the plate opening state is determined to reach a set position, the oil pump is controlled to be closed, the overflow valve is controlled to be closed, and the pressure relief valve is controlled to be opened.
And step B5, when the press fit pressure monitoring value meets the third plate opening allowance condition, controlling the pressure relief valve and the plate opening valve to close, so as to realize the plate opening operation of the filter press, in practical application, continuously acquiring the press fit pressure monitoring value of the filter press in real time and comparing the pressure relief pressure monitoring value with the pressure relief pressure set value until the press fit pressure monitoring value of the filter press is determined to be less than or equal to the pressure relief pressure set value, indicating that the press fit pressure monitoring value of the filter press meets the third plate opening allowance condition, controlling the pressure relief valve to close, closing the plate opening valve, completing the plate opening and issuing prompt information.
Further, in an embodiment, in step B3, the opening plate automatic control unit controls the operation of the relevant valve to realize the opening plate adjustment process, including the following operations:
when the press-fit pressure monitoring value meets the set pressure relief value, controlling the pressure relief valve to be closed, and controlling the overflow valve and the plywood valve to be opened; specifically, the pressing pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value, and the pressure relief valve and the plate opening valve are controlled to be closed, and the overflow valve and the plate opening valve are controlled to be opened until the pressing pressure monitoring value is determined to be less than or equal to the pressure relief pressure set value.
Judging whether the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened when the pressure monitoring value of the plywood plate meets the set value of the pressure of the plywood plate or more; in the step, when the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, the fact that the axial force of the filter plate suspension rod of the filter press still does not meet a second opening plate allowable condition is indicated, at the moment, an alarm needs to be given, otherwise, the fact that the axial force of the filter plate suspension rod of the filter press can meet the second opening plate allowable condition after adjustment is indicated, then follow-up operation is executed to judge whether the pressure monitoring value of the plywood plate meets the set condition or not, specifically, the pressure monitoring value of the plywood plate of the filter press is continuously obtained in real time and compared with the pressure set value of the plywood plate, and when the pressure monitoring value of the plywood plate is determined to be greater than or equal to the pressure set value of the plywood plate, an overflow valve is controlled to be closed, and the pressure relief valve is opened.
And further, when the lamination pressure monitoring value is less than or equal to the pressure relief pressure set value, controlling the pressure relief valve and the plywood valve to close, and controlling the overflow valve and the plywood valve to open, and executing the step B3 again, wherein in the step, the lamination pressure monitoring value of the filter press is continuously obtained in real time and is compared with the pressure relief pressure set value until the lamination pressure monitoring value is determined to be less than or equal to the pressure relief pressure set value, the pressure relief valve and the plywood valve are controlled to close, the overflow valve and the plywood valve are controlled to open, and the step B3 is executed again.
In this embodiment, in order to ensure that the axial force monitoring value of the filter plate suspension rod of the filter press meets the second opening allowance condition after a series of adjustment actions are performed, the step B3 is performed again to detect the axial force monitoring value of the filter plate suspension rod again, so that the axial force change of the filter plate suspension rod, which may be caused by multi-link operation, is avoided to a considerable extent, and the opening operation reliability and accuracy of the filter press are improved.
Further, in one embodiment, in step B2, the method further includes:
after the oil pump, the overflow valve and the plate opening valve are opened, the plate opening automatic control unit calculates the plate opening operation times, judges whether the accumulated plate opening times reach a set time threshold value or not, and alarms if the accumulated plate opening times reach the set time threshold value. In the embodiment, a plate opening time threshold value is set, when an automatic plate opening program is started, specifically, after an oil pump, an overflow valve and a plate opening valve are controlled to be opened, the current plate opening operation time is increased by one, whether the accumulated plate opening time reaches the set time threshold value or not is judged, and if yes, an alarm is given; if not, the current accumulated plywood times does not exceed the set times threshold value and is within the acceptable plywood times range, so the operation of the current plywood protection is continuously executed. By adopting the scheme, the problem that the plate opening attempt times are too frequent in the set time period of the filter press after the known fault exists can be avoided, the resource loss and the fault caused by repeated redundant operation in the plate opening operation process can be avoided to a certain extent, and the service life of each related structure is prolonged.
Specifically, in one embodiment, when the automatic board combination/opening control module gives an alarm, the following steps are specifically executed: controlling the filter press to pause, outputting an alarm prompt signal corresponding to the fault data, and reminding workers to intervene to remove the fault; wherein the fault data includes information on the faulty component and the operating status of the current filter press. In the embodiment, when the alarm information is output to remind the worker of removing the fault, the fault position information of the filter press and the current fault operation message are output to the worker, so that the worker can be helped to accurately match with a proper maintenance worker, and the timeliness and the success rate of removing the fault can be improved by the maintenance worker according to the obtained information.
In the full-automatic protection system for the open-close board of the filter press, provided by the embodiment of the invention, each module or unit structure can independently operate or operate in a combined mode according to actual application requirements so as to realize corresponding technical effects.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures, process steps, or materials disclosed herein but are extended to equivalents thereof as would be understood by those ordinarily skilled in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrase "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A full-automatic protection method for an open-close board of a filter press is characterized by comprising the following steps:
identifying operational requirements of the filter press;
when the filter press has the plate combination/plate opening requirement, an oil pump of a filter press system and related valves of a plate combination/plate opening are controlled to operate based on a real-time filter plate suspension rod axial force monitoring value, a plate combination pressure monitoring value and a pressing pressure monitoring value of the filter press, so that the filter press meets the set plate combination/plate opening condition, and the plate combination/plate opening operation of the filter press is realized;
wherein, the relevant valve of plywood/division board includes: the pressure relief valve, the plate closing valve, the overflow valve, the plate opening valve and the pressure relief valve;
when the filter press has plywood requirements, the control is carried out by the following steps:
step A1, controlling an oil pump, an overflow valve and a plywood valve of the filter pressing system to be opened;
step A2, judging whether the current axial force monitoring value of the filter plate suspension rod meets the first plywood allowable condition, if not, controlling an overflow valve to be closed, closing a plywood valve, opening a pressure relief valve, controlling related valves to operate according to a real-time plywood pressure monitoring value, the axial force monitoring value of the filter plate suspension rod and a pressing pressure monitoring value to realize plywood adjustment, and entering the step A3 until the axial force monitoring value of the filter plate suspension rod of the filter press meets the first plywood allowable condition; when the axial force monitoring value of the current filter plate suspension rod of the filter press is determined to be less than or equal to a set value, the axial force of the current filter plate suspension rod of the filter press meets the allowance condition of a first plywood, otherwise, the axial force does not meet the allowance condition of the first plywood;
step A3, when the pressure monitoring value of the pressure filter meets the second plywood permission condition, controlling the overflow valve to close and the pressure relief valve to open; when the press fit pressure monitoring value of the press filter is greater than or equal to the plywood pressure setting value, the press fit pressure monitoring value of the press filter meets the second plywood allowable condition;
step A4, when the press fit pressure monitoring value of the press filter meets the third plywood permission condition, controlling the pressure relief valve to be closed, the plywood valve to be closed and the oil pump to be closed, and realizing plywood operation of the press filter; when the press fit pressure monitoring value of the press filter is less than or equal to the pressure relief pressure set value, the press fit pressure monitoring value of the press filter meets the allowable condition of the third plywood;
in step a2, the operation of the relevant valve is controlled to realize the adjustment process of the plywood, which includes the following operations:
when the real-time plate combining pressure monitoring value of the filter press meets a pressure relief pressure set value or less, the pressure relief valve is controlled to be closed, and the overflow valve and the plate opening valve are controlled to be opened;
judging whether the real-time monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened;
when the real-time pressing pressure monitoring value of the filter press meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate opening valve to be closed, opening the overflow valve and the plate closing valve, and executing the step A2 again;
when the filter press has an open plate requirement, the method comprises the following steps:
b1, controlling the pressure relief valve to be opened, monitoring the state of the pressure relief valve in real time, controlling the pressure relief valve to be opened when the state of the pressure relief valve reaches a set position within set time, and otherwise, alarming;
step B2, when the monitoring value of the pressing pressure meets the first opening plate allowance condition, controlling an oil pump, an overflow valve and an opening plate valve of the filter pressing system to open; when the pressing pressure monitoring value is smaller than the pressure relief pressure set value, the pressing pressure monitoring value of the filter press meets the first plate opening permission condition;
step B3, judging whether the axial force monitoring value of the filter plate suspension rod meets a second plate opening allowance condition, if not, controlling an overflow valve to be closed, closing a plate opening valve, opening a pressure relief valve, controlling related valves to operate according to the real-time axial force monitoring value of the filter plate suspension rod and a pressing pressure monitoring value to realize plate opening adjustment, and entering the step B4 until the axial force monitoring value of the filter plate suspension rod of the filter press meets the second plate opening allowance condition; when the axial force monitoring value of the filter plate suspension rod is determined to be less than or equal to a set value, the axial force monitoring value of the filter plate suspension rod of the filter press meets a second plate opening permission condition, otherwise, the axial force monitoring value does not meet the second plate opening permission condition;
step B4, when the plate opening state reaches the set position, controlling the oil pump and the overflow valve to close, and opening the pressure relief valve;
step B5, when the press fit pressure monitoring value meets the third plate opening allowance condition, controlling the pressure relief valve and the plate opening valve to be closed, and realizing the plate opening operation of the filter press; when the stitching pressure monitoring value of the filter press is less than or equal to the pressure relief pressure set value, the stitching pressure monitoring value of the filter press meets the third open plate allowable condition;
in step B3, the process of controlling the operation of the relevant valve to realize the opening adjustment includes the following operations:
when the press-fit pressure monitoring value meets the set pressure relief value, controlling the pressure relief valve to be closed, and controlling the overflow valve and the plywood valve to be opened;
judging whether the monitoring value of the axial force of the filter plate suspension rod exceeds the set value of the axial force of the filter plate suspension rod, if so, giving an alarm, otherwise, controlling an overflow valve to be closed and a pressure relief valve to be opened when the pressure monitoring value of the plywood plate meets the set value of the pressure of the plywood plate or more;
and when the press fit pressure monitoring value meets the pressure relief pressure set value or less, controlling the pressure relief valve and the plate closing valve to be closed, and controlling the overflow valve and the plate opening valve to be opened, and executing the step B3 again.
2. The method for automatically protecting plywood used in filter presses according to claim 1, wherein said step a1 further comprises:
and after the oil pump, the overflow valve and the plywood valve are opened, calculating the operation times of the plywood, judging whether the accumulated times of the plywood reaches a set time threshold value, and if so, giving an alarm.
3. The method for automatically protecting plywood used in filter presses according to claim 1, wherein in step B2, the method further comprises:
and after the oil pump, the overflow valve and the plate opening valve are opened, calculating the plate opening operation times, judging whether the accumulated plate opening times reach a set time threshold value, and if so, giving an alarm.
4. The method for fully automatically protecting plywood used in filter presses according to claim 1, wherein the method further comprises:
and the acquired axial force monitoring value of the filter plate suspension rod, the acquired pressure monitoring value of the plywood and the acquired data of the pressure monitoring value of the pressing pressure are displayed and stored in a correlation manner with time information so as to be checked, called and analyzed by a user.
5. The full-automatic protection method for the open-close board of the filter press according to any one of claims 1 to 4, characterized in that when an alarm is given, the following steps are executed: controlling the filter press to pause, outputting an alarm prompt signal corresponding to the fault data, and reminding workers to intervene to remove the fault; wherein the fault data includes information on the faulty component and the operating status of the current filter press.
6. A fully automatic protection system for open-close plates of filter presses, characterized in that it carries out the method according to any one of claims 1 to 5.
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