CN115350765A - Intelligent driving system of high-pressure roller mill - Google Patents
Intelligent driving system of high-pressure roller mill Download PDFInfo
- Publication number
- CN115350765A CN115350765A CN202211139076.3A CN202211139076A CN115350765A CN 115350765 A CN115350765 A CN 115350765A CN 202211139076 A CN202211139076 A CN 202211139076A CN 115350765 A CN115350765 A CN 115350765A
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- voltage
- frequency converter
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- roller
- voltage frequency
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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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
- B02C4/42—Driving mechanisms; Roller speed control
Abstract
The invention discloses an intelligent driving system of a high-pressure roller mill, which belongs to the technical field of automatic control and comprises a first circuit breaker QF1, a second circuit breaker QF2 and a high-pressure intelligent control cabinet; the first breaker QF1 and the second breaker QF2 are respectively connected with two high-voltage intelligent control cabinets of the movable roller and the fixed roller; a first high-voltage frequency converter and a second high-voltage frequency converter are correspondingly installed in the two groups of high-voltage intelligent control cabinets, the first high-voltage frequency converter is suitable for being connected with a movable roller, and the second high-voltage frequency converter is suitable for being connected with a fixed roller; the first breaker QF1 is connected with the first high-voltage frequency converter and is connected with a motor M1, and then the first breaker QF1 is connected with a rotating roller through a corresponding universal shaft; the second breaker QF2 is connected with the high-voltage frequency converter two phase and is connected with a motor two M2, and then is connected with the fixed roller through a corresponding universal shaft; the invention solves the technical problems that the original factory design accessories are easy to break down after being used for a long time and the maintenance period is long.
Description
Technical Field
The invention belongs to the technical field of automatic control, and particularly relates to an intelligent driving system of a high-pressure roller mill.
Background
The high-voltage roller mill motor-driven and fixed roller driving system mainly comprises a Siemens 3AH5115 type high-voltage circuit breaker, a variable comprehensive protection measurement and control device for Taikai WXH-55T, a three-winding ZTS-2200/6 type rectifier transformer, a Siemens SIMOVERTMV (6 SE8020-1AA 01-Z) air-cooled medium-voltage frequency converter and a Siemens IPQ4.504-4CV00-Z type medium-voltage motor. The communication module of the medium-voltage frequency converter SS52 is connected with an external I/O interface ET200S, is used as a slave station under a master station of a master control S7-300PLC, and performs master and slave station data exchange by depending on an ET200S interface module IM151 and an input and output module; the speed regulation control and the function protection are carried out on the movable roller motor and the fixed roller motor. And the post worker carries out crushing operation and state monitoring on the high-pressure roller mill through the upper computer.
In recent years, faults of a driving system occur frequently, due to the fact that the service life of a high-voltage switch cabinet is long, the auxiliary contact and the position switch are often in poor contact to cause fault tripping, a Siemens high-voltage circuit breaker used in an original factory stops production, cannot be repaired after being damaged, and serious influences are brought to production. Along with the technical transformation of enterprises to high-voltage power supply intelligent centralized control electricity, the technical upgrading transformation of a circuit breaker, comprehensive protection and a grounding knife in a high-voltage cabinet designed by a factory cannot be realized, the remote electric operation and monitoring function cannot be realized, the upgrading transformation of a driving system of the high-voltage roller mill is realized through comprehensive consideration, the IGBT device designed by the factory cannot be used as a trigger plate, an optical fiber cable and an interface, an optical fiber relay, two AVT2 electronic shunts and 1 voltage shunt AVT3 device frequently break down due to overlong running time, the maintenance fault period is long, and spare part allocation is difficult. Upgrading and modifying of a high-pressure roller mill driving system is imminent.
Disclosure of Invention
In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses an intelligent driving system of a high-voltage roller mill, which comprises a main power grid, a cardan shaft, a movable roller and a fixed roller, wherein the main power grid is suitable for supplying power to the movable roller and the fixed roller, and further comprises a first circuit breaker QF1, a second circuit breaker QF2 and a high-voltage intelligent control cabinet; two groups of high-voltage intelligent control cabinets are arranged, the requirement of enterprise power centralized control power is met, and corresponding frequency converters are installed in the high-voltage intelligent control cabinets to form interlocking protection;
the first breaker QF1 and the second breaker QF2 are respectively connected with two high-voltage intelligent control cabinets of a movable roller and a fixed roller; the first high-voltage frequency converter and the second high-voltage frequency converter are correspondingly installed in the two groups of high-voltage intelligent control cabinets, the first high-voltage frequency converter and the second high-voltage frequency converter are correspondingly connected to form a standby high-voltage frequency conversion chamber, the first high-voltage frequency converter is suitable for being connected with a movable roller, the second high-voltage frequency converter is suitable for being connected with a fixed roller, and static debugging of the standby high-voltage frequency conversion chamber and communication testing of a main station of a roller grinding control system are completed before installation; the first breaker QF1 is connected with the first high-voltage frequency converter and is connected with a motor M1, and then the first breaker QF1 is connected with a rotating roller through a corresponding universal shaft; the second breaker QF2 is connected with the high-voltage frequency converter two phase and is connected with a motor two M2, and then is connected with the fixed roller through a corresponding universal shaft;
the high-voltage frequency converter I or the high-voltage frequency converter II is suitable for debugging voltage fluctuation of a main power grid, and the high-voltage frequency converter I or the high-voltage frequency converter II is suitable for ensuring that the output voltage fluctuation of the standby high-voltage frequency conversion chamber is stably output within a rated range of +10% to-10%;
a remote control and local control switching button is arranged at a cabinet door under the high-voltage intelligent control; the corresponding high-voltage frequency converter provides an independent PROFIBUS-DP interface;
speed regulation control: the first high-voltage frequency converter and the second high-voltage frequency converter are internally suitable for assembling and mounting a first frequency converter control platform and a second frequency converter control platform, and the first frequency converter control platform and the second frequency converter control platform exchange data with a control system master station through a DP/DP COUPLER COUPLER in a DP communication mode to realize information interaction and coordination control between the frequency converters and the roller mill PLC; and the synchronous speed regulation of the first motor M1 and the second motor M2 is realized by giving the same frequency value of the frequency converter through the PLC.
In a further technical scheme, the frequency converter control platform comprises a main control panel MPU, an optical fiber expansion board, an analog input module DAI, a digital quantity input-output module DDX and a power unit control panel CCB; the analog input module DAI conditions the acquired input and output current and voltage signals of the frequency converter, converts the signals into digital quantity signals and transmits the digital quantity signals to the main control panel MPU in an optical fiber communication mode; the main control panel MPU completes all functions of motor control and completes three-phase voltage instructions of the modulator.
In a further technical scheme, the high-pressure roller mill is started: when the high-pressure roller mill is started, the hydraulic system is in a release state, and the fixed roller and the movable roller are started in an idle load manner simultaneously; after the system is started to a normal state, the pressure of a hydraulic system is increased to a pre-tightening pressure value, the system starts to perform blanking, the hydraulic system loads a moving roller, and the extrusion pressure of the roller mill is gradually increased to a set value so as to keep a good mineral aggregate yield; the roller grinding pressure detection system automatically adjusts the gap of the grinding roller according to a pressure set value remotely transmitted by the DCS, and the rolling stability is kept.
In a further technical scheme, the main control board MPU is suitable for detecting input voltage and current, input protection and input voltage values, and is used for synchronously switching frequency and phase angle; communicating with the power unit, generating a unit IGBT device trigger command and protecting the power unit; the digital quantity input and output module DDX is suitable for monitoring and controlling the switching value of the frequency converter system and the DCS interface; the power unit board CCB finishes the control and protection of the power unit through optical fiber communication.
In a further technical scheme, the control panel is installed on the first high-voltage frequency converter and the second high-voltage frequency converter, the human-computer interface of the control panel conducts system debugging, carries out various control operations and parameter setting, and has interaction of input current, input voltage, output current and output frequency.
In a further technical solution, the output voltage of the high voltage frequency conversion chamber fluctuates: the voltage fluctuation of the rated voltage is within the range of 65-90%, the operation is normal continuously, and an undervoltage alarm system is designed;
the voltage fluctuation of the rated voltage is less than or equal to 65 percent below the rated range, and the standby high-voltage frequency conversion chamber stops outputting and starts running after the voltage recovers to be normal;
when the voltage fluctuation of the rated voltage exceeds +115 percent, the standby high-voltage frequency conversion chamber immediately protects the high-voltage roller mill.
Compared with the prior art, the invention can obtain the following technical effects:
the invention upgrades the driving system, and the roller grinding pressure detection system automatically adjusts the gap of the grinding roller according to the pressure set value transmitted by DCS remote from the power receiving end to the design of the electric control and automatic control system, thereby keeping the rolling stable. To maintain good mineral aggregate yield.
A high-voltage switch cabinet breaker of an intelligent driving system of a high-pressure roller mill is designed to completely adopt a domestic intelligent driving system with stable and reliable performance, the system is designed and installed completely and independently, the intelligent driving system of the high-pressure roller mill is provided with an automatic control device, the driving system of the high-pressure roller mill has stable and reliable performance, remote metering management and control can be realized, images are displayed, and signals, videos and monitoring are safe and reliable. The spare part cost is reduced; the spare part period is shortened, and potential safety hazards and production efficiency reduction brought to equipment by foreign environment influence are avoided.
The device is designed with a primary loop simulation diagram and switch state indication, and the control mode selects remote/local and manual operation switching-on/switching-off, energy storage switch, high-voltage electrified display including locking output, lighting control and other functions, and integrates operation and display. The three-phase energy management system has the functions of displaying three-phase voltage and three-phase current, has the power utilization requirement of three-level energy management, and can realize remote metering management and control.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a main circuit topology of the system installation of the present invention;
FIG. 2 is a block diagram of a high-voltage variable-frequency speed regulation control system.
In the figure: 1. fixing a roller; 2. a moving roller; 3. a first high-voltage frequency converter; 4. a second high-voltage frequency converter; 5. a first frequency converter control platform; 6. a second frequency converter control platform; 7. an upper computer; 8. a roller mill PLC; 9. a cardan shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
The fixed roller 1 and the moving roller 2 of the high-pressure roller mill are driven by two high-voltage motors, the driving system comprises a main power grid, a universal shaft 9, a moving roller 2 and the fixed roller 1, the main power grid is suitable for supplying power to the moving roller 2 and the fixed roller 1, and when the high-pressure roller mill is started, a hydraulic system is in a release state; the fixed roller 1 and the movable roller 2 are started in an idle load mode simultaneously, after the fixed roller and the movable roller are started to be in a normal state, the pressure of a hydraulic system is increased to a pre-tightening pressure value system to start blanking, the hydraulic system loads the movable roller 2, and the extrusion pressure of the roller mill is gradually increased to a set value so as to keep a good mineral aggregate yield. The roller grinding pressure detection system automatically adjusts the gap of the grinding roller according to a pressure set value remotely transmitted by the DCS, and the rolling stability is kept.
The first breaker QF1 is connected with the first high-voltage frequency converter and is connected with a first motor M1, and then is connected with the movable roller 2 through a corresponding cardan shaft 9; the second breaker QF2 is connected with the high-voltage frequency converter two phase and is connected with a motor two M2, and then is connected with the fixed roller 1 through a corresponding cardan shaft 9.
The intelligent driving system comprises a first circuit breaker QF1 and a second circuit breaker QF2 which are respectively used for controlling a rotating switch of a movable roller 2 and a fixed roller 1. Two high-voltage intelligent control cabinets are installed, the high-voltage intelligent control cabinets completely meet the requirement of enterprise power centralized control power, and chain protection of corresponding frequency converters is reserved. And (4) installing in advance for debugging, and preparing for comprehensive butt joint with the original equipment.
Further, the driving system needs to establish a standby high-voltage frequency conversion chamber for installing a high-voltage frequency converter for connecting the movable roller 2 and the fixed roller 1, and well performs static debugging on equipment and communication testing of a main station of the roller grinding control system. The frequency converter comprises a first high-voltage frequency converter 3 and a second high-voltage frequency converter 4, and has extremely strong adaptability to the voltage fluctuation of a power grid, so that the voltage fluctuation of the driving system can be continuously and stably output within a rated range of +10% to-10%, the voltage fluctuation of the rated voltage can be normally continuously operated within a range of 65% -90%, and an under-voltage alarm system is designed. Within the voltage fluctuation of the rated voltage being less than or equal to 65 percent of the rated range, the frequency converter stops outputting, and the frequency converter can be started to run by flying after the voltage recovers to normal. When the voltage fluctuation of the rated voltage is +115%, the high-voltage roller mill is an intelligent driving system to immediately protect the equipment. The intelligent driving system frequency converter of the high-voltage roller mill is provided with protection measures such as overcurrent, overvoltage, undervoltage, open-phase protection, short-circuit protection, over-frequency protection, overheating protection of power devices, instant power failure protection and the like. The performance of the protection meets the standard regulation, and the high-voltage switch on the input side can be jumped in a combined mode.
Furthermore, considering that the frequency converter should have a flexible and convenient human-computer interaction interface, a control panel is arranged for interaction, and all parameters/variables, alarm details and fault analysis results of the frequency converter can be displayed. The frequency converter has a local floor control function and a remote control function, and the two control functions are provided with a change-over switch. The control panel can be used for system debugging, various control operations and parameter settings are carried out, and the display function of input current, input voltage, output current and output frequency is required. The frequency converter has a remote control/local control function, and a remote control and local control switching button is arranged at a cabinet door of the high-voltage intelligent control; the corresponding high-voltage frequency converter provides an independent PROFIBUS-DP interface.
The first high-voltage frequency converter 3 and the second high-voltage frequency converter 4 are internally suitable for assembling and installing a first frequency converter control platform 5 and a second frequency converter control platform 6, and the first frequency converter control platform 5 and the second frequency converter control platform 6 exchange data with a control system master station through a DP/DP COUPLER COUPLER in a DP communication mode to realize information interaction and coordination control between the frequency converters and the roller mill PLC 8; the synchronous speed regulation of the first motor M1 and the second motor M2 is realized by giving the same frequency value of the frequency converter through the roller mill PLC 8.
A frequency converter control platform of an intelligent driving system of a high-pressure roller mill comprises a main control panel MPU, an optical fiber expansion board, an analog input module DAI, a digital input-output module DDX and a power unit control panel CCB. The analog input module DAI conditions the acquired input and output current and voltage signals of the frequency converter, converts the signals into digital quantity signals and transmits the digital quantity signals to the main control panel in an optical fiber communication mode. The main control panel MPU completes all functions of motor control and completes three-phase voltage instructions of the modulator. In addition, it detects the input voltage and current, the input protection (overcurrent, reactive current excess, undervoltage and single phase) and the input voltage value, the frequency and phase angle for synchronous switching. And the power unit is communicated with the power unit, and the trigger command of the unit IGBT device is generated and the power unit is protected. And the digital quantity input-output module DDX is mainly used for monitoring and controlling the switching values of the frequency converter system and the DCS interface. The power unit board CCB finishes the control and protection of the power unit through optical fiber communication.
The design of this intelligent high-voltage control cabinet and circuit breaker of intelligence actuating system adopts domestic equipment completely, and this system independently designs the installation completely, and the device designs a return circuit analogue diagram and on-off state and instructs, and control mode selection (distant place/local), manual operation (combined floodgate/separating brake), energy storage switch, high-voltage electrified demonstration (including shutting output), functions such as lighting control integrate operation and show in an organic whole. The three-phase voltage and three-phase current display system has the functions of displaying three-phase voltage and three-phase current, has the power utilization requirement of three-level energy management, and can realize remote metering control.
In order to further explain the function of an intelligent driving system of the high-pressure roller mill and the field use effect, the control system program of the imported high-pressure roller mill and the picture variable and program of the upper computer 7 are carried out by combining the application experience, the DI/DO switching value of a domestic high-pressure frequency converter and the frequency given signal of an analog input frequency converter are butted, 4-20mA is corresponding to 0-50Hz, the output frequency of the analog output frequency converter is 4-20mA is corresponding to 0-50Hz, 4-20mA is corresponding to the output current of the frequency converter, interlocking signals of a preceding-stage high-voltage cabinet, state feedback and the like.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An intelligent driving system of a high-pressure roller mill comprises a main power grid, a universal shaft, a movable roller and a fixed roller, wherein the main power grid is suitable for supplying power to the movable roller and the fixed roller, and the intelligent driving system is characterized in that: the intelligent high-voltage control system also comprises a first circuit breaker QF1, a second circuit breaker QF2 and a high-voltage intelligent control cabinet; two groups of high-voltage intelligent control cabinets are arranged, the requirement of enterprise power centralized control power is met, and corresponding frequency converters are installed in the high-voltage intelligent control cabinets to form interlocking protection;
the first breaker QF1 and the second breaker QF2 are respectively connected with two high-voltage intelligent control cabinets of the movable roller and the fixed roller; the first high-voltage frequency converter and the second high-voltage frequency converter are correspondingly installed in the two groups of high-voltage intelligent control cabinets, the first high-voltage frequency converter and the second high-voltage frequency converter are correspondingly connected to form a standby high-voltage frequency conversion chamber, the first high-voltage frequency converter is suitable for being connected with a movable roller, the second high-voltage frequency converter is suitable for being connected with a fixed roller, and static debugging of the standby high-voltage frequency conversion chamber and communication testing of a main station of a roller grinding control system are completed before installation; the first breaker QF1 is connected with the first high-voltage frequency converter and is connected with a first motor M1, and then the first breaker QF1 is connected with a moving roller through a corresponding universal shaft; the second breaker QF2 is connected with the high-voltage frequency converter II and is connected with a motor II M2, and then is connected with the fixed roller through a corresponding universal shaft;
the high-voltage frequency converter I or the high-voltage frequency converter II is suitable for debugging voltage fluctuation of a main power grid, and the high-voltage frequency converter I or the high-voltage frequency converter II is suitable for ensuring that the output voltage fluctuation of the standby high-voltage frequency conversion chamber is stably output within a rated range of +10% to-10%;
a remote control and local control switching button is arranged at a cabinet door under the high-voltage intelligent control; the corresponding high-voltage frequency converter provides an independent PROFIBUS-DP interface;
speed regulation control: the first high-voltage frequency converter and the second high-voltage frequency converter are internally suitable for assembling and mounting a first frequency converter control platform and a second frequency converter control platform, and the first frequency converter control platform and the second frequency converter control platform exchange data with a control system master station through a DP/DP COUPLER COUPLER in a DP communication mode to realize information interaction and coordination control between the frequency converters and the roller mill PLC; and the synchronous speed regulation of the first motor M1 and the second motor M2 is realized by giving the same frequency value of the frequency converter through the PLC.
2. The intelligent drive system for the high pressure roller mill according to claim 1, wherein: the frequency converter control platform comprises a main control panel MPU, an optical fiber expansion board, an analog input module DAI, a digital quantity input-output module DDX and a power unit control panel CCB; the analog input module DAI conditions the acquired input and output current and voltage signals of the frequency converter, converts the signals into digital quantity signals and transmits the digital quantity signals to the main control panel MPU in an optical fiber communication mode; the main control panel MPU completes all functions of motor control and completes three-phase voltage instructions of the modulator.
3. An intelligent drive system for a high pressure roller mill according to claim 2, characterized in that: starting the high-pressure roller mill: when the high-pressure roller mill is started, the hydraulic system is in a release state, and the fixed roller and the movable roller are started in an idle load manner at the same time; after the system is started to a normal state, the pressure of a hydraulic system is increased to a pre-tightening pressure value, the system starts to perform blanking, the hydraulic system loads a moving roller, and the extrusion pressure of the roller mill is gradually increased to a set value so as to keep a good mineral aggregate yield; the roller grinding pressure detection system automatically adjusts the gap of the grinding roller according to a pressure set value remotely transmitted by the DCS, and the rolling stability is kept.
4. An intelligent drive system for a high pressure roller mill according to claim 3, characterized in that: the main control board MPU is suitable for detecting input voltage and current, input protection and input voltage values, and is used for synchronously switching frequency and phase angle; communicating with the power unit, generating a unit IGBT device trigger command and protecting the power unit; the digital quantity input-output module DDX is suitable for monitoring and controlling the switching value of the frequency converter system and the DCS interface; the power unit board CCB finishes the control and protection of the power unit through optical fiber communication.
5. The intelligent drive system for the high pressure roller mill according to claim 4, wherein: and the control panel is arranged on the first high-voltage frequency converter and the second high-voltage frequency converter, and a human-computer interface of the control panel is used for carrying out system debugging, carrying out various control operations and parameter setting and realizing interaction of input current, input voltage, output current and output frequency.
6. The intelligent driving system of the high-pressure roller mill according to claim 5, characterized in that: fluctuation of output voltage of the high-voltage frequency conversion chamber: the voltage fluctuation of the rated voltage is within the range of 65% -90%, the operation is normal continuously, and an under-voltage alarm system is designed;
the voltage fluctuation of the rated voltage is less than or equal to 65 percent below the rated range, and the standby high-voltage frequency conversion chamber stops outputting and starts running after the voltage recovers to be normal;
when the voltage fluctuation of the rated voltage exceeds +115 percent, the standby high-voltage frequency conversion chamber immediately protects the high-voltage roller mill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211139076.3A CN115350765A (en) | 2022-09-19 | 2022-09-19 | Intelligent driving system of high-pressure roller mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211139076.3A CN115350765A (en) | 2022-09-19 | 2022-09-19 | Intelligent driving system of high-pressure roller mill |
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| CN115350765A true CN115350765A (en) | 2022-11-18 |
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2022
- 2022-09-19 CN CN202211139076.3A patent/CN115350765A/en active Pending
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