CN110898896A - Integrated hydraulic adjusting and controlling system of roller press - Google Patents
Integrated hydraulic adjusting and controlling system of roller press Download PDFInfo
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- CN110898896A CN110898896A CN201911135660.XA CN201911135660A CN110898896A CN 110898896 A CN110898896 A CN 110898896A CN 201911135660 A CN201911135660 A CN 201911135660A CN 110898896 A CN110898896 A CN 110898896A
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- pressure
- deviation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
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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
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Abstract
The invention discloses an integrated hydraulic regulation control system of a roller press, which comprises a first control module, a second control module and a control module, wherein the first control module is used for controlling the constant pressure between two rollers and executing the following processes: when the material enters the roller press, maintaining the pressure for a set time when the hydraulic pressure is loaded to a set working pressure value, wherein the pressure between the two rollers changes within an allowable deviation range within the pressure maintaining set time; at the moment, the accumulator performs pressure correction on the hydraulic system, namely, when the pressure is lower than the allowable error range of the set value, pressurization is performed until the hydraulic pressure reaches the set value; when the hydraulic pressure is higher than the set value allowable error range, reducing the pressure until the pressure reaches the set value; the pressure of the hydraulic system is kept constant within the allowable deviation range of the set value, and the like. The invention provides a new control system which can control the left and right pressure deviation of two rollers and keep the pressure of the two rollers stable.
Description
Technical Field
The invention relates to the technical field of roller presses, in particular to an integrated hydraulic adjusting and controlling system of a roller press.
Background
When the roller press runs, materials are crushed under the pressure action of the two rollers when passing between the fixed roller and the movable roller. In the process that the material is extruded by the compression roller, the reaction force of the material to the compression roller can enable the movable roller of the roller press to generate a backspacing force, and the hydraulic control system is used for applying pressure to the movable roller and maintaining the stability of a roller gap between the fixed roller and the movable roller.
The two ends of the movable roller are pressed by hydraulic cylinders arranged on the end parts of the roller press, and the hydraulic cylinders are respectively arranged on the two sides of the movable roller and symmetrically assembled on the end parts. The hydraulic cylinder presses the bearing seats at the two sides of the movable roller, so that the hydraulic cylinder is transferred to the material between the two rollers. The pressure control of each hydraulic cylinder is controlled by a combined control valve block which is arranged on the side end part of the movable roller of the roller press. The combined control valve block mainly comprises an integrated block, an energy accumulator, an electromagnetic directional valve, a throttle valve, a one-way valve, an overflow valve, a pressure sensor, a quick unloading valve group and a pressure measuring joint. The supplement and the discharge of the hydraulic oil in the hydraulic cylinder are controlled by related hydraulic components on the combined control valve block.
Among the prior art, the roll squeezer procedure divide into constant roll gap and constant pressure control basically, and constant pressure control's technique considers only to guarantee that there is pressure just to have fine extrusion effect, and constant roll gap control's technique considers only to guarantee that two rollers are parallel (two rollers are not parallel have one side can leak the material serious, and the material can not be extruded) just have fine extrusion effect, and both have the shortcoming: the roll gap deviation of constant pressure control is large, the pressure deviation of constant roll gap control is large, and the actual extrusion effect is not good.
For example, chinese patent application publication No. CN109896325A discloses a deviation rectifying device for a roller press and a control method thereof, which includes a fixed bearing seat and a movable bearing seat for respectively mounting two ends of a fixed roller and a movable roller, the fixed bearing seat and the movable bearing seat are arranged in parallel at intervals, corresponding surfaces of the fixed bearing seat and the movable bearing seat are respectively connected with a first wedge block and a second wedge block, wedge surfaces of the first wedge block and the second wedge block are mutually matched, a hydraulic cylinder is arranged on the other surface of the movable bearing seat, and a control system controls the hydraulic cylinder to drive the movable bearing seat to be close to the fixed bearing seat, so that the two rollers are in a position approximately parallel or parallel, and simultaneously, the roll gaps at two ends are ensured to be adjusted to within an error range, thereby ensuring the operation stability and reliability of the. However, the existing error range still has large deviation, the deviation itself is not controlled, and the actual extrusion effect is not good.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an integrated hydraulic regulation control system of a roller press, provides a new control system, can control the left and right pressure deviation of two rollers and keep the pressure of the two rollers stable, and can better ensure the effective work of the roller press, automatically correct the deviation and improve the extrusion effect compared with the scheme of adopting constant roll gap and constant pressure control in the prior art.
The purpose of the invention is realized by the following technical scheme:
an integrated hydraulic regulation control system for a roller press, comprising:
the first control module is used for controlling the constant pressure between the two rollers and executing the process: when the material enters the roller press, maintaining the pressure for a set time when the hydraulic pressure is loaded to a set working pressure value, wherein the pressure between the two rollers changes within an allowable deviation range within the pressure maintaining set time; at the moment, the accumulator performs pressure correction on the hydraulic system, namely, when the pressure is lower than the allowable error range of the set value, pressurization is performed until the hydraulic pressure reaches the set value; when the hydraulic pressure is higher than the set value allowable error range, reducing the pressure until the pressure reaches the set value; the pressure of the hydraulic system is kept constant within the allowable deviation range of the set value;
the second control module is used for controlling the pressure deviation between the two rollers and executing the process: setting a working pressure value and an allowable deviation value, setting a pressure deviation value which allows deviation correction, and enabling a rolling machine control program not to forcibly correct the deviation and/or not to forcibly keep constant pressure according to the pressure deviation value which allows deviation correction.
Further, the first control module is controlled for 14-16 mins of pressure maintaining time.
Further, the first control module comprises a pre-pressure control executing step, and when the hydraulic oil station operates normally under the condition of no operation, the main control program of the roller press controls the actual pressure within a set value range through pressurization or decompression according to a pre-pressure set value.
Further, the second control module executes the following process:
s1, when the left-right gap deviation of the two rollers is smaller than the allowable deviation range, adjusting according to the set value of the working pressure;
s2, when the left-right gap deviation of the two rollers is larger than the allowable deviation range, the pressurizing valve at the side with the larger gap opens the system to pressurize; and opening the system for pressure reduction by the small pressure reducing valve on the side with small clearance, and circulating in sequence in the deviation rectifying period and keeping the working pressure within the set upper limit range and the set lower limit range.
Further, in step S2, the following sub-step S21 is included;
and S21, if the deviation correcting pressure difference value exceeds the set upper and lower limit values due to the roll gap deviation in the deviation correcting process, stopping the deviation correcting operation and stabilizing the output pressure within the set value range.
Further, in step S21, if the roll gap deviation occurs, an alarm prompt signal is sent out, and it is determined whether the roll gap deviation is within the set error range, if the roll gap deviation reaches the set range, the alarm is released, if the roll gap deviation on both sides continues to increase and reaches the set high limit value, a command for closing the pneumatic valve is sent out within a first set time, if the field pneumatic valve cannot be closed, the roll press will be stopped urgently after the alarm signal continues for a second set time.
Furthermore, the first set time range is 1-3S, and the second set time range is 4-6S.
Further, the first set time range is 2S, and the second set time range is 5S.
The invention has the beneficial effects that:
(1) the invention provides a new control system which can control the left and right pressure deviation of two rollers and keep the pressure of the two rollers stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first flowchart of a first embodiment of the present invention;
fig. 2 is a second flow chart according to the first embodiment of the invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following. All of the features disclosed in this specification, or all of the steps of a method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features and/or steps are used.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known circuits, software, or methods have not been described in detail so as not to obscure the present invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Before describing the embodiments, some necessary terms need to be explained. For example:
if the terms "first," "second," etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element discussed below could also be termed a "second" element without departing from the teachings of the present invention. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.
The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended as limitations of the invention, with the singular being intended to include the plural unless the context clearly dictates otherwise.
When the terms "comprises" and/or "comprising" are used in this specification, these terms are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As shown in fig. 1-2, an integrated hydraulic regulation control system for a roll squeezer includes:
the first control module is used for controlling the constant pressure between the two rollers and executing the process: when the material enters the roller press, maintaining the pressure for a set time when the hydraulic pressure is loaded to a set working pressure value, wherein the pressure between the two rollers changes within an allowable deviation range within the pressure maintaining set time; at the moment, the accumulator performs pressure correction on the hydraulic system, namely, when the pressure is lower than the allowable error range of the set value, pressurization is performed until the hydraulic pressure reaches the set value; when the hydraulic pressure is higher than the set value allowable error range, reducing the pressure until the pressure reaches the set value; the pressure of the hydraulic system is kept constant within the allowable deviation range of the set value;
the second control module is used for controlling the pressure deviation between the two rollers and executing the process: setting a working pressure value and an allowable deviation value, setting a pressure deviation value which allows deviation correction, and enabling a rolling machine control program not to forcibly correct the deviation and/or not to forcibly keep constant pressure according to the pressure deviation value which allows deviation correction.
Further, the first control module is controlled for 14-16 mins of pressure maintaining time.
Further, the first control module comprises a pre-pressure control executing step, and when the hydraulic oil station operates normally under the condition of no operation, the main control program of the roller press controls the actual pressure within a set value range through pressurization or decompression according to a pre-pressure set value.
Further, the second control module executes the following process:
s1, when the left-right gap deviation of the two rollers is smaller than the allowable deviation range, adjusting according to the set value of the working pressure;
s2, when the left-right gap deviation of the two rollers is larger than the allowable deviation range, the pressurizing valve at the side with the larger gap opens the system to pressurize; and opening the system for pressure reduction by the small pressure reducing valve on the side with small clearance, and circulating in sequence in the deviation rectifying period and keeping the working pressure within the set upper limit range and the set lower limit range.
Further, in step S2, the following sub-step S21 is included;
and S21, if the deviation correcting pressure difference value exceeds the set upper and lower limit values due to the roll gap deviation in the deviation correcting process, stopping the deviation correcting operation and stabilizing the output pressure within the set value range.
Further, in step S21, if the roll gap deviation occurs, an alarm prompt signal is sent out, and it is determined whether the roll gap deviation is within the set error range, if the roll gap deviation reaches the set range, the alarm is released, if the roll gap deviation on both sides continues to increase and reaches the set high limit value, a command for closing the pneumatic valve is sent out within a first set time, if the field pneumatic valve cannot be closed, the roll press will be stopped urgently after the alarm signal continues for a second set time.
Furthermore, the first set time range is 1-3S, and the second set time range is 4-6S.
Further, the first set time range is 2S, and the second set time range is 5S.
Example one
As shown in fig. 1-2, an integrated hydraulic regulation control system for a roll squeezer includes:
the first control module is used for controlling the constant pressure between the two rollers and executing the process: when the material enters the roller press, maintaining the pressure for a set time when the hydraulic pressure is loaded to a set working pressure value, wherein the pressure between the two rollers changes within an allowable deviation range within the pressure maintaining set time; at the moment, the accumulator performs pressure correction on the hydraulic system, namely, when the pressure is lower than the allowable error range of the set value, pressurization is performed until the hydraulic pressure reaches the set value; when the hydraulic pressure is higher than the set value allowable error range, reducing the pressure until the pressure reaches the set value; the pressure of the hydraulic system is kept constant within the allowable deviation range of the set value;
the second control module is used for controlling the pressure deviation between the two rollers and executing the process: setting a working pressure value and an allowable deviation value, setting a pressure deviation value which allows deviation correction, and enabling a rolling machine control program not to forcibly correct the deviation and/or not to forcibly keep constant pressure according to the pressure deviation value which allows deviation correction.
In this embodiment, the whole system of the integrated hydraulic adjustment control system of the roller press integrates a plurality of detection systems and control elements, the control system is placed in a main control cabinet, the OS interface adopts a touch screen matched with the control system, and various auxiliary equipment start and stop signals, data detection, deviation correction, equipment operation protection and the like of the roller press are respectively detected and controlled by a field control box and the main control cabinet. The main components in the main control cabinet are as follows: PLC constitutes module, analog signal isolator, temperature transmitter, intermediate relay, interchange isolation transformer, direct current transformer, ac contactor, automatic switch, and composition such as thermorelay mainly has following function:
(1) signal monitoring: the method comprises the following steps of electrical equipment operation, ready query, fault recording, historical events, historical trends, parameter setting and the like.
(2) Signal detection: the control of a motor of the oil station and a heater of the hydraulic station of the speed reducer, and the detection of signals of temperature, pressure, differential pressure, liquid level, current, external joint control and the like of the oil station.
The main components in the field control box are as follows: the digital display instrument, an indicator light, a button and the like.
(1) Signal monitoring: and (4) displaying roll gaps on two sides, pressure on two sides, feeding opening on two sides and monitoring temperature measuring points.
(2) Signal detection: the method comprises the following steps of electrical equipment operation, conversion of a plurality of control modes, manual/automatic conversion of pressurization, decompression and deviation rectification modes.
Analog signals of pressure, temperature, roller clearance, current and the like on site are sent into an analog quantity input module of the main control cabinet PLC through various transmitters, and digital quantity signals of the motor, a site starting button and the like are sent into a digital quantity input module. The starting or stopping of each motor is controlled by a digital quantity output module through the logical operation of the CPU. And the running signal of the motor is sent to the digital input module. And an auxiliary equipment operation instruction is provided in the field control box.
A PLC software system: the PLC program adopts a PLC special function block to program, and can realize the following functions:
1) interlocking of the main motor of the roller press. When the temperature of the roller main bearing exceeds 75 ℃, the temperature of the roller main motor bearing exceeds 75 ℃, the temperature of the roller motor winding exceeds 120 ℃, the oil temperature of the roller speed reducer exceeds 70 ℃, or the deviation of the left and right gaps of the two rollers is more than 18mm, and the pressure of the hydraulic station is higher than 16Mpa, the main motor is stopped (the parameters can be modified).
2) And (4) performing interlocking control on starting and stopping of the main motor, the lubricating oil pump, the hydraulic oil pump and the electromagnetic valve.
3) And controlling the throughput. The feeding amount is adjusted according to the feeding device, and the feeding amount is timely adjusted according to the stability of the system, so that the saturated feeding of the roller press is ensured, and the stable operation of the equipment is ensured.
4) And hydraulic regulation automatic control.
5) And a communication program with an upper computer.
And (4) carrying out configuration on related software through PLC software. The software configuration comprises the configuration of relevant points, the configuration of alarms, the configuration of trend graphs and the like, and a grouping graph and a simulation graph are manufactured. Thus, the functions of operation, monitoring, alarming and the like can be realized on the touch screen.
The oil level of hydraulic oil in an oil tank of the hydraulic station is detected by a liquid level controller, a low-level alarm is set, and after 5 minutes of delay, if the alarm signal is not eliminated, a shutdown alarm signal of the roll squeezer is sent out.
The temperature of the hydraulic oil in the oil tank is detected by a platinum thermal resistor, and when the oil temperature is lower than 25 ℃ (the temperature can be modified), the electric heater supplies power to heat the hydraulic oil in the oil tank; when the temperature of the hydraulic oil reaches 35 ℃, the electric heater is powered off.
When the hydraulic pump is in operation, if the temperature of oil in the oil tank of the hydraulic station reaches 40 ℃, a cooling water valve on a water supply pipeline of a cooler of the hydraulic station is opened to supply water for cooling the hydraulic oil to the cooler.
After the hydraulic station operates for a period of time, when a filter element of a high-pressure filter is dirty and the differential pressure of filtered oil reaches a set value, a differential pressure transmitter arranged on the filter sends out an alarm electrical signal, and simultaneously a red plug of the differential pressure transmitter is ejected out, so that the filter element is required to be replaced when the hydraulic station is stopped.
The pressure of the piston end of each group of hydraulic cylinders is detected by a pressure sensor on the combined control valve block, and the pressure and displacement combined detection control is realized together with the roller gap detected by a displacement sensor arranged on the roller press body.
When the pressure at the piston end of the hydraulic cylinder is reduced and needs to be pressurized, the electromagnetic directional valve on the hydraulic station is electrified during pressurization, the electromagnetic directional valve V01/V02 on the combined control valve block is electrified and reversed, hydraulic oil enters the hydraulic cylinder, and the working pressure of the hydraulic cylinder is increased.
When the master control program sends out a roller fast-backing signal, the electromagnet of the electromagnetic unloading valve set electromagnetic reversing valve on the combined control valve block is powered off and reversed, and the piston end of the hydraulic cylinder is fast released.
The most critical part in the automatic control of the roller press is a hydraulic adjusting system, and in the embodiment, the control parameters and the control scheme are as follows:
1) when the pressure of the hydraulic system reaches pre-pressurization before the roller press system operates. When the engine is stopped due to a fault, the quick pressure relief valve is opened to relieve pressure. The two measures are mainly used for protecting the safety of equipment and personnel.
2) The deviation correcting mode of the hydraulic system adopts an automatic deviation correcting mode and a manual deviation correcting mode so as to meet the operation requirements under different conditions.
3) And (3) after the loading action necessary conditions that an oil circuit system is normal, a roller gap is normal and a fixed roller runs normally for 30 seconds, starting a movable roller motor, completing the starting of the movable roller motor and running normally, opening a blanking pneumatic valve of the material level bin, and running the system.
4) Constant value control of pressure between two rolls, hydraulic loading when materials just enter the roll squeezer, and simultaneously opening electromagnetic valves for loading on two sides). When the pressure is lower than the allowable error range of the set value, the hydraulic oil pump is automatically started, the pressurizing valve is opened again until the hydraulic pressure reaches the set value, and when the hydraulic pressure is higher than the allowable error range of the set value, the pressure reducing valve is opened until the pressure reaches the set value.
5) And the left and right roll gaps/pressure deviation of the two rolls are controlled, so that the effective work of the roll squeezer is ensured.
① when the left-right gap deviation of the two rollers is smaller than the allowable deviation range, the adjustment is performed according to the working pressure set value.
② when the left and right gap deviation of the two rollers is larger than the allowable deviation range, the pressure valve on the side with larger gap opens the system to pressurize, the pressure reducing valve on the side with smaller gap opens the system to reduce pressure, and the system cycles in turn and keeps the working pressure in the set upper and lower limit range, if the deviation of the roll gap is too serious in the deviation rectifying process, the deviation rectifying pressure difference value exceeds the set upper and lower limit values, the system considers that the system can not operate according to the principle of roll gap priority, the hydraulic system stops the deviation rectifying operation, in order to ensure the extrusion effect of the equipment, the hydraulic system outputs pressure stably in the set value range, at this time, the system will continuously send out alarm signal, if the deviation of the roll gap reaches the set range, the system alarm is released, if the deviation of the roll gap on both sides continuously increases and reaches the set high limit value, in order to ensure the safety of the equipment, the system will send out the command of closing the pneumatic valve in 2S (if the field pneumatic valve can not close, the roll press will urgently stop the system).
In other technical features of the embodiment, those skilled in the art can flexibly select and use the features according to actual situations to meet different specific actual requirements. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known algorithms, methods or systems have not been described in detail so as not to obscure the present invention, and are within the scope of the present invention as defined by the claims.
For simplicity of explanation, the foregoing method embodiments are described as a series of acts or combinations, but those skilled in the art will appreciate that the present application is not limited by the order of acts, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The disclosed systems, modules, and methods may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be referred to as an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It will be understood by those skilled in the art that all or part of the processes in the methods for implementing the embodiments described above can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when executed, the program can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, etc.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An integrated hydraulic adjustment control system of a roller press, comprising:
the first control module is used for controlling the constant pressure between the two rollers and executing the process: when the material enters the roller press, maintaining the pressure for a set time when the hydraulic pressure is loaded to a set working pressure value, wherein the pressure between the two rollers changes within an allowable deviation range within the pressure maintaining set time; at the moment, the accumulator performs pressure correction on the hydraulic system, namely, when the pressure is lower than the allowable error range of the set value, pressurization is performed until the hydraulic pressure reaches the set value; when the hydraulic pressure is higher than the set value allowable error range, reducing the pressure until the pressure reaches the set value; the pressure of the hydraulic system is kept constant within the allowable deviation range of the set value;
the second control module is used for controlling the pressure deviation between the two rollers and executing the process: setting a working pressure value and an allowable deviation value, setting a pressure deviation value which allows deviation correction, and enabling a rolling machine control program not to forcibly correct the deviation and/or not to forcibly keep constant pressure according to the pressure deviation value which allows deviation correction.
2. The integrated hydraulic pressure regulation control system of the roller press according to claim 1, wherein the first control module dwell time is 14-16 mins.
3. The integrated hydraulic regulation control system of the roller press as claimed in claim 1, wherein the first control module comprises a pre-pressure control step, and when the hydraulic oil station operates normally under the non-operation condition, the main control program of the roller press controls the actual pressure within the set value range by pressurization or depressurization according to the pre-pressure set value.
4. The integrated hydraulic pressure regulation control system of the roller press according to any one of claims 1 to 3, wherein the second control module executes the following processes:
s1, when the left-right gap deviation of the two rollers is smaller than the allowable deviation range, adjusting according to the set value of the working pressure;
s2, when the left-right gap deviation of the two rollers is larger than the allowable deviation range, the pressurizing valve at the side with the larger gap opens the system to pressurize; and opening the system for pressure reduction by the small pressure reducing valve on the side with small clearance, and circulating in sequence in the deviation rectifying period and keeping the working pressure within the set upper limit range and the set lower limit range.
5. The integrated hydraulic adjustment control system for a roller press according to claim 4, wherein in step S2, the following sub-steps S21 are included;
and S21, if the deviation correcting pressure difference value exceeds the set upper and lower limit values due to the roll gap deviation in the deviation correcting process, stopping the deviation correcting operation and stabilizing the output pressure within the set value range.
6. The integrated hydraulic regulation control system of roller press of claim 5,
in step S21, if the roll gap deviation occurs, an alarm prompt signal is sent out, and whether the roll gap deviation is within a set error range is determined, if the roll gap deviation reaches the set range, the alarm is released, if the roll gap deviation on both sides continuously increases and reaches a set high limit value, a command for closing the pneumatic valve is sent out within a first set time, and if the field pneumatic valve cannot be closed, the roll press is stopped urgently after the alarm signal continues for a second set time.
7. The integrated hydraulic pressure regulating and controlling system of the roller press machine according to claim 6, characterized in that the first set time is in the range of 1-3S, and the second set time is in the range of 4-6S.
8. The integrated hydraulic adjustment control system of a roller press according to claim 7, wherein the first set time range is 2S and the second set time range is 5S.
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