A high consistency refiner protection control system

Abstract

The application provides a high-concentration grinding equipment protection control system, a grinding disc module includes a moving grinding disc and a static grinding disc, the moving grinding disc and the static grinding disc are oppositely arranged and form a grinding space, which is used for realizing material grinding operation, a driving module includes a high-voltage asynchronous motor and a feed and retreat knife control device, the high-voltage asynchronous motor and the feed and retreat knife control device are sequentially in transmission connection with the moving grinding disc, which is used for driving the moving grinding disc and realizing feed and retreat knife movement, a sensor module includes a static grinding disc vibration sensor and a static grinding disc pulse impact sensor, which is used for monitoring real-time vibration parameters and pulse impact parameters of the static grinding disc, an alarm signal processing transfer module is used for receiving monitoring data output by the sensor module and outputting an alarm signal to a high-speed PLC subsystem, and the high-speed PLC subsystem is used for outputting a driving instruction to the driving module according to the alarm signal. Through the application, the high-concentration grinding equipment has the functions of autonomous monitoring, hierarchical early warning and integrated interlocking protection.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pulp grinding equipment, and particularly relates to a high-concentration pulp grinding equipment protection control system. BACKGROUND

[0002] The high-concentration pulp grinding equipment is an important equipment for processing fiber raw materials in the pulp and paper industry, which is mainly used for grinding and pulping plant fibers (such as wood, bamboo, straw, etc.) under high concentration conditions to prepare high-quality pulp. In the high-precision control process of the high-concentration pulp grinding equipment, the gap between the dynamic grinding disc and the static grinding disc is very small, usually only 0.1 mm, and improper control can cause serious equipment damage and even personal accidents.

[0003] Under the prior art, the conventional high-concentration pulp grinding equipment generally lacks the functions of effective monitoring, early warning and interlocking protection integration, and there is a great safety hazard in the operation process. SUMMARY

[0004] The application provides a high-concentration pulp grinding equipment protection control system to solve the technical problem that the conventional high-concentration pulp grinding equipment protection control system does not have the functions of monitoring, early warning and interlocking protection integration under the prior art.

[0005] To solve the above problems, the technical scheme of the application is as follows: a high-concentration pulp grinding equipment protection control system, comprising:

[0006] A grinding disc module, the grinding disc module comprises a dynamic grinding disc and a static grinding disc, the dynamic grinding disc and the static grinding disc are arranged opposite to each other and form a grinding space, and the grinding disc module is used for realizing material grinding operation;

[0007] A driving module, the driving module comprises a high-voltage asynchronous motor and a forward and backward knife control device, the high-voltage asynchronous motor and the forward and backward knife control device are sequentially in transmission connection with the dynamic grinding disc, and the driving module is used for driving the dynamic grinding disc to realize forward and backward knife movement;

[0008] A sensor module, the sensor module comprises a static grinding disc vibration sensor and a static grinding disc pulse impact sensor, the static grinding disc vibration sensor is used for monitoring real-time vibration parameters of the static grinding disc, and the static grinding disc pulse impact sensor is used for monitoring real-time pulse impact parameters of the static grinding disc;

[0009] An alarm signal processing transfer module, the alarm signal processing transfer module is electrically connected with a high-speed PLC subsystem, the alarm signal processing transfer module is used for receiving monitoring data output by the sensor module and outputting an alarm signal to the high-speed PLC subsystem, and the high-speed PLC subsystem is electrically connected with the driving module, and the high-speed PLC subsystem is used for outputting a driving instruction to the driving module according to the alarm signal.

[0010] Preferably, the grinding disc module is provided with a first lubricating device for providing lubricating medium to the moving grinding disc, and a sealing water supply device for sealing and isolating the grinding space in the grinding disc module from the external space.

[0011] The driving module is provided with a second lubricating device for providing lubricating medium to the high-voltage asynchronous motor and the in-out tool control device, and a cooling water supply device for reducing the operating temperature of the high-voltage asynchronous motor and the in-out tool control device.

[0012] Preferably, the sensor module is provided with a first temperature sensor, a first flow sensor, a liquid level sensor and a pressure sensor in the first lubricating device and the second lubricating device, respectively, for monitoring the operating state of the first lubricating device and the second lubricating device and outputting to the high-speed PLC subsystem.

[0013] The sensor module is also provided with a second temperature sensor and a second flow sensor in the sealing water supply device and the cooling water supply device, respectively, for monitoring the operating state of the sealing water supply device and the cooling water supply device and outputting to the high-speed PLC subsystem.

[0014] Preferably, the sensor module is also provided with a grinding disc gap sensor and a limit switch in the grinding disc module, the grinding disc gap sensor is used to monitor the gap value between the moving grinding disc and the static grinding disc, and output to the high-speed PLC subsystem, the limit switch is used to limit the moving stroke of the moving grinding disc.

[0015] Preferably, the alarm signal processing and transfer module includes a monitoring alarm device, which processes the monitoring data after receiving the monitoring data of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and according to the emergency degree of the monitoring data, visualizes and outputs a first level alarm and a second level alarm corresponding to the static grinding disc vibration sensor and the static grinding disc pulse impact sensor on the monitoring alarm device, respectively.

[0016] Moreover, the monitoring alarm device converts the monitoring data of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor into 4-20mA standard monitoring signals and outputs to the high-speed PLC subsystem.

[0017] Preferably, the high-speed PLC subsystem receives the first-level and second-level alarms corresponding to the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and the monitoring signals of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and performs secondary processing on the monitoring data to obtain primary alarms and high-level alarms;

[0018] The first-level or second-level alarms output by the monitoring alarm device and the primary or high-level alarms output by the high-speed PLC subsystem are subjected to AND logic calculation. When the alarm level of the first-level or second-level alarms output by the monitoring alarm device is the same as the alarm level of the primary or high-level alarms output by the high-speed PLC subsystem, the high-speed PLC subsystem outputs a driving instruction corresponding to the alarm level to the driving module. When the alarm level of the first-level or second-level alarms output by the monitoring alarm device is different from the alarm level of the primary or high-level alarms output by the high-speed PLC subsystem, the high-speed PLC subsystem outputs a driving instruction corresponding to a lower alarm level to the driving module.

[0019] Preferably, the high-speed PLC subsystem receives the alarm signals output by the alarm signal processing and transfer module, and the single control cycle time of the driving instruction output to the driving module is limited to be less than or equal to 5 ms.

[0020] Preferably, in a continuous control cycle, when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the first time, the in-out tool control device controls the dynamic grinding disc to perform the first tool retraction; when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the second time, the in-out tool control device controls the dynamic grinding disc to perform the second tool retraction; when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the third time, the in-out tool control device controls the dynamic grinding disc to perform the third tool retraction; when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the fourth time, the in-out tool control device controls the dynamic grinding disc to perform the fourth tool retraction and retract to the maximum opening.

[0021] When the high-speed PLC subsystem outputs a high-level alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module, the in-out tool control device controls the dynamic grinding disc to perform tool retraction and retract to the maximum opening.

[0022] Preferably, the in-out tool control device is provided with a position control mode, and the in-out tool control device adjusts the moving speed of the moving grinding disc according to the real-time position of the moving grinding disc.

[0023] Preferably, the in-out tool control device is further provided with a power control mode, and the in-out tool control device adjusts the moving speed of the moving grinding disc according to the real-time required input power of the moving grinding disc.

[0024] Compared with the prior art, the high-concentration grinding equipment protection control system has the following advantages and positive effects:

[0025] The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem.

[0027] Figure 2 The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem.

[0028] Figure 3 The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem.

[0029] Figure 4 The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem. DETAILED DESCRIPTION

[0030] The high-concentration grinding equipment protection control system provided by the application comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem.

[0031] Referring to Figures 1 to 4The embodiment provides a high-concentration grinding equipment protection control system, which comprises a grinding disc module, a driving module, a sensor module, an alarm signal processing transfer module and a high-speed PLC subsystem, and is used for realizing the integrated functions of autonomous monitoring, hierarchical early warning and interlocking protection of the high-concentration grinding equipment.

[0032] The grinding disc module comprises a dynamic grinding disc and a static grinding disc, the dynamic grinding disc and the static grinding disc are oppositely arranged, and there is an adjustable gap between the dynamic grinding disc and the static grinding disc, forming a grinding space; when the dynamic grinding disc rotates and the static grinding disc remains stationary, relative movement is formed between the dynamic grinding disc and the static grinding disc, and material grinding work is realized based on a physical grinding mechanism; in the embodiment, the grinding disc module can adopt a spiral structure; the material can be input into the grinding space through a feeding port and pushed forward along a spiral path, and finally discharged from a discharging port.

[0033] The driving module comprises a high-voltage asynchronous motor and a feeding and retracting knife control device, the high-voltage asynchronous motor is connected with the feeding and retracting knife control device, the feeding and retracting knife control device is further connected with the dynamic grinding disc, the high-voltage asynchronous motor is used for providing a power source for the feeding and retracting knife control device and the dynamic grinding disc, and the feeding and retracting knife control device is used for controlling the feeding and retracting knife path movement of the dynamic grinding disc.

[0034] The sensor module comprises a static grinding disc vibration sensor and a static grinding disc pulse impact sensor; the static grinding disc vibration sensor is arranged on one side of the side portion of the feeding end of the static grinding disc and is used for monitoring the real-time vibration parameters of the static grinding disc; the measurement range of the static grinding disc vibration sensor is 0.5-49.9 mm / s RMS, the upper limit of the measurement frequency is 5000 Hz, and the lower limit of the measurement frequency is 100 Hz; the static grinding disc pulse impact sensor is arranged on the bottom of one side of the feeding end of the static grinding disc and is used for monitoring the real-time pulse impact parameters of the static grinding disc, that is, the abnormal impact or collision data of the static grinding disc in the running process; the measurement range of the static grinding disc pulse impact sensor is 0-99 dBsv.

[0035] The input end of the alarm signal processing transfer module is electrically connected with the output end of the sensor module, that is, the monitoring data of the sensor module can be transmitted to the alarm signal processing transfer module; the output end of the alarm signal processing transfer module is electrically connected with the signal end of the high-speed PLC subsystem; the alarm signal processing transfer module can output an alarm signal to the high-speed PLC subsystem based on the monitoring data; and the control end of the high-speed PLC subsystem is further electrically connected with the driving module, that is, the high-speed PLC subsystem outputs a driving instruction to the driving module according to the alarm signal, and automatically adjusts the feeding and retracting process of the dynamic grinding disc.

[0036] In the following, the specific structure and functions of the high-concentration grinding equipment protection control system provided by the embodiment will be described in further detail.

[0037] Preferably, in the embodiment, the first lubricating device is arranged in the mill module to provide lubricating medium for the moving mill plate, and the sealing water supply device is arranged in the mill module to seal and isolate the grinding space in the mill module from the outside space to prevent the pulp from leaking out. The second lubricating device is arranged in the drive module to provide lubricating medium for the high-voltage asynchronous motor and the in-out tool control device, and the cooling water supply device is arranged in the drive module to reduce the operating temperature of the high-voltage asynchronous motor and the in-out tool control device, thereby effectively controlling the temperature of the high-concentration grinding equipment and ensuring the stable operation and efficient work of the high-concentration grinding equipment.

[0038] Further, the sensor module is provided with a first temperature sensor, a first flow sensor, a liquid level sensor, and a pressure sensor in the first lubricating device and the second lubricating device, respectively. The first temperature sensor is used to monitor the temperature of the lubricating medium in the first lubricating device and the second lubricating device, the first flow sensor is used to monitor the flow of the lubricating medium in the first lubricating device and the second lubricating device, the liquid level sensor is used to monitor the capacity of the lubricating medium in the first lubricating device and the second lubricating device, and the pressure sensor is used to monitor the pressure difference of the lubricating medium between the inlet and outlet of the filter in the first lubricating device and the second lubricating device. In summary, the sensor module can monitor the operating state of the first lubricating device and the second lubricating device through multiple sensors and output to the high-speed PLC subsystem. The high-speed PLC subsystem dynamically adjusts the operating process of the high-concentration grinding equipment according to the operating state of the first lubricating device and the second lubricating device. Furthermore, the sensor module is also provided with a second temperature sensor and a second flow sensor in the sealing water supply device and the cooling water supply device, respectively. The second temperature sensor is used to monitor the temperature of the water in the sealing water supply device and the cooling water supply device, and the second flow sensor is used to monitor the flow of the water in the sealing water supply device and the cooling water supply device. In summary, the sensor module can monitor the operating state of the sealing water supply device and the cooling water supply device through multiple sensors and output to the high-speed PLC subsystem. The high-speed PLC subsystem dynamically adjusts the operating process of the high-concentration grinding equipment according to the operating state of the sealing water supply device and the cooling water supply device.

[0039] Preferably, in the embodiment, the sensor module is also provided with a mill gap sensor and a limit switch in the mill module. The mill gap sensor is used to monitor the gap value between the moving mill plate and the static mill plate and output to the high-speed PLC subsystem, which facilitates the high-speed PLC subsystem to realize precise feedback control of the gap between the moving mill plate and the static mill plate. The limit switch includes a lower limit switch and an upper limit switch, which are used to limit the minimum and maximum movement stroke of the moving mill plate.

[0040] Preferably, in the embodiment, the alarm signal processing relay module is provided with a monitoring alarm device, which is electrically connected with the static grinding disc vibration sensor and the static grinding disc pulse impact sensor respectively, can receive the monitoring data output by the static grinding disc vibration sensor and the static grinding disc pulse impact sensor respectively, and can further calculate and process the monitoring data. When the monitoring data exceeds the preset threshold value, the monitoring alarm device can output a first alarm and a second alarm respectively for the static grinding disc vibration sensor and the static grinding disc pulse impact sensor. The first alarm and the second alarm are intended to indicate different emergency levels of the alarm, and the first alarm and the second alarm can be output and displayed through digital visualization or sound-light display, etc., for reminding the staff that the high consistency pulp grinding equipment has an abnormal operation condition.

[0041] In an embodiment, the high consistency pulp grinding equipment comprises a field monitoring box, in which the monitoring alarm device, the touch screen, the power supply, the signal conversion device, the operation button, the emergency stop button and other necessary devices are integrally installed, for realizing manual control of the high consistency pulp grinding equipment.

[0042] Further, in the embodiment, in addition to directly visualizing and outputting the monitoring data through the first alarm and the second alarm, the monitoring alarm device can also convert the vibration frequency signal and the pulse impact signal output by the static grinding disc vibration sensor and the static grinding disc pulse impact sensor into 4-20 mA standard monitoring signals respectively, and output them to the high-speed PLC subsystem.

[0043] Preferably, in the embodiment, the high-speed PLC subsystem can receive the first alarm and the second alarm corresponding to the static grinding disc vibration sensor and the static grinding disc pulse impact sensor output by the monitoring alarm device, and the 4-20 mA standard monitoring signals of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor. The high-speed PLC subsystem performs secondary calculation and processing on the monitoring signals, and when the monitoring data exceeds the preset threshold value, obtains a primary alarm and a high-level alarm respectively for the static grinding disc vibration sensor and the static grinding disc pulse impact sensor. The primary alarm and the high-level alarm are also intended to indicate different emergency levels of the alarm, and it is worth noting that, in the theoretical state, the judgment criteria of the primary alarm and the first alarm are consistent, and the judgment criteria of the high-level alarm and the second alarm are consistent, i.e., in the monitoring alarm device and the high-speed PLC subsystem, the monitoring data output by the static grinding disc vibration sensor and the static grinding disc pulse impact sensor are calculated and judged respectively.

[0044] In the embodiment, to avoid the calculation error of the monitoring alarm device and the high-speed PLC subsystem, the output first-level alarm or second-level alarm of the monitoring alarm device and the output primary alarm or high-level alarm of the high-speed PLC subsystem are further subjected to AND logic calculation in the high-speed PLC subsystem. When the alarm level of the output first-level alarm or second-level alarm of the monitoring alarm device is the same as the alarm level of the output primary alarm or high-level alarm of the high-speed PLC subsystem, the high-speed PLC subsystem outputs the driving instruction corresponding to the alarm level to the driving module. That is, when the monitoring alarm device outputs the first-level alarm and the high-speed PLC subsystem also calculates the primary alarm, the high-speed PLC subsystem finally outputs the primary alarm and outputs the first-level driving instruction corresponding to the first-level alarm or the primary alarm to the driving module. When the monitoring alarm device outputs the second-level alarm and the high-speed PLC subsystem also calculates the high-level alarm, the high-speed PLC subsystem finally outputs the high-level alarm and outputs the second-level driving instruction corresponding to the second-level alarm or the high-level alarm to the driving module.

[0045] When the alarm level of the output first-level alarm or second-level alarm of the monitoring alarm device is different from the alarm level of the output primary alarm or high-level alarm of the high-speed PLC subsystem, the high-speed PLC subsystem outputs the driving instruction corresponding to the lower alarm level to the driving module. That is, when the monitoring alarm device outputs the first-level alarm but the high-speed PLC subsystem calculates the high-level alarm, the high-speed PLC subsystem finally outputs the low-level alarm and outputs the first-level driving instruction corresponding to the first-level alarm or the primary alarm to the driving module. When the monitoring alarm device outputs the second-level alarm but the high-speed PLC subsystem calculates the primary alarm, the high-speed PLC subsystem finally outputs the low-level alarm and outputs the first-level driving instruction corresponding to the first-level alarm or the primary alarm to the driving module. When the monitoring alarm device does not output the alarm signal or the high-speed PLC subsystem does not calculate the alarm signal, the high-speed PLC subsystem does not output the driving instruction to the driving module.

[0046] In summary, in the embodiment, only when the monitoring alarm device and the high-speed PLC subsystem both output the alarm signal, the high-speed PLC subsystem enables the driving module to realize the interlocking protection action, so as to prevent the calculation error of the monitoring alarm device or the high-speed PLC subsystem from causing the misoperation and affecting the operation efficiency of the high-concentration grinding equipment.

[0047] Preferably, in the embodiment, the high-speed PLC subsystem is configured with a high-speed IO module and has better operation and fast response capability. The high-speed PLC subsystem receives the alarm signal output by the alarm signal processing and transfer module and outputs the driving instruction to the driving module in a single control cycle time, which is limited to be less than or equal to 5 ms. That is, the high-speed PLC subsystem meets the high reliability and high-speed processing performance, so as to effectively improve the response speed of the interlocking protection action of the high-concentration grinding equipment.

[0048] Preferably, in the continuous control cycle, when the high-speed PLC subsystem outputs the primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the first time, the in-out tool control device controls the dynamic grinding disc to execute the first tool withdrawal, thereby increasing the gap between the dynamic grinding disc and the static grinding disc; in the next control cycle, if the high-speed PLC subsystem outputs the primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the second time, the in-out tool control device controls the dynamic grinding disc to execute the second tool withdrawal, thereby further increasing the gap between the dynamic grinding disc and the static grinding disc; in the next control cycle, if the high-speed PLC subsystem outputs the primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the third time, the in-out tool control device controls the dynamic grinding disc to execute the third tool withdrawal, thereby further increasing the gap between the dynamic grinding disc and the static grinding disc; in the next control cycle, if the high-speed PLC subsystem outputs the primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the fourth time, the in-out tool control device controls the dynamic grinding disc to execute the fourth tool withdrawal and return to the maximum opening. That is, when the vibration alarm or the pulse impact alarm occurs, the contact pressure between the dynamic grinding disc and the static grinding disc is gradually reduced by controlling the dynamic grinding disc to withdraw the tool a small amount of times in the continuous control cycle, thereby smoothly reducing the impact and vibration and more accurately finding the optimal working gap. During the adjustment of the dynamic grinding disc, the high-concentration pulp grinding equipment can still maintain continuous and stable production operation.

[0049] When the vibration alarm or the pulse impact alarm disappears, the high-concentration pulp grinding equipment can continue to perform the grinding operation based on the gap between the dynamic grinding disc and the static grinding disc at this time, or the dynamic grinding disc and the static grinding disc can be adjusted to the initial gap state by the reset button.

[0050] In the embodiment, when one of the following alarm conditions occurs, the in-out tool control device controls the dynamic grinding disc to execute the tool withdrawal and return to the maximum opening to prevent high-risk collision between the dynamic grinding disc and the static grinding disc. The alarm conditions include when the high-speed PLC subsystem outputs the high-level alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module, when the high-concentration pulp grinding equipment communication fails, when the grinding space pressure alarm occurs in the grinding disc module, and when the emergency stop signal occurs, etc.

[0051] Referring to Figures 2 to 4 Preferably, in the embodiment, the in-out tool control device is provided with a position control mode and a power control mode. When the in-out tool control device is selected as the position control mode, the in-out tool control device can adjust the moving speed of the dynamic grinding disc according to the real-time position of the dynamic grinding disc. The real-time position of the dynamic grinding disc can be detected by the above-mentioned grinding disc gap sensor. For example, in the process of advancing the tool of the dynamic grinding disc, the in-out tool control device controls the dynamic grinding disc to move from the far-end waiting position P max to the near-end production position P productionDuring the initial movement, the feed / retract control device maintains a moving speed of 1 mm / s for the moving grinding disc. When the moving grinding disc passes the deceleration gap position P... slow At that time, the feed / retract control device controls the moving grinding disc to decelerate to a moving speed of 0.1 mm / s. When the moving grinding disc moves to the production position P... production At this time, the advance / retraction control device stops the movement of the moving grinding disc. The advance / retraction control device controls the moving grinding disc to decelerate slowly, which can improve the control accuracy of the gap between the moving grinding disc and the stationary grinding disc, and improve the running stability of the moving grinding disc, avoiding large impacts and vibrations to the high-consistency grinding equipment due to sudden stops during movement.

[0052] When the feed / retract control device is selected in power control mode, the closer the moving grinding disc is to the stationary grinding disc, the greater the shearing and frictional forces on the material. Therefore, the moving grinding disc requires more input power to maintain the same rotational speed. The feed / retract control device can adjust the moving speed of the moving grinding disc based on its real-time input power requirement. For example, during the initial grinding stage, the feed / retract control device keeps the moving grinding disc at full speed. When the input power required for the moving grinding disc to rotate increases to the first set power, the feed / retract control device slows the moving grinding disc down to a speed of 1 mm / s. When the input power required for the moving grinding disc to rotate increases to the second set power, the feed / retract control device slows the moving grinding disc down to a speed of 0.1 mm / s. When the input power required for the moving grinding disc to rotate increases to the third set power, the feed / retract control device stops the moving grinding disc.

[0053] In summary, this embodiment provides a protection and control system for a high-consistency grinding equipment. It includes a grinding disc module, a drive module, a sensor module, an alarm signal processing and relay module, and a high-speed PLC subsystem. During the operation of the high-consistency grinding equipment, several sensors in the sensor module monitor the operating status of each device in the equipment in real time and feed this information back to the alarm signal processing and relay module and the high-speed PLC subsystem. The high-speed PLC subsystem can output control commands to automatically adjust the relative positions of the moving and stationary grinding discs in the grinding disc module, ensuring the safe operation of the moving and stationary grinding discs and other devices. This enables the high-consistency grinding equipment to have integrated functions of autonomous monitoring, graded early warning, and interlocking protection, effectively improving the operating efficiency and safety of the high-consistency grinding equipment.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A high consistency refiner protection control system, characterized by, The application relates to a high-pressure asynchronous motor and a feed-forward and feed-backward control device, which are sequentially in transmission connection with a dynamic grinding disc, and are used for driving the dynamic grinding disc to realize feed-forward and feed-backward movement. The application relates to a static grinding disc vibration sensor and a static grinding disc pulse impact sensor, wherein the static grinding disc vibration sensor is used for monitoring real-time vibration parameters of the static grinding disc, and the static grinding disc pulse impact sensor is used for monitoring real-time pulse impact parameters of the static grinding disc. The application relates to an alarm signal processing and transferring module which is electrically connected with a high-speed PLC subsystem, is used for receiving monitoring data output by the sensor module, and outputs an alarm signal to the high-speed PLC subsystem. The application relates to a monitoring alarm device in the alarm signal processing and transferring module, which is used for processing monitoring data after receiving the monitoring data of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and is used for visually outputting a first-level alarm and a second-level alarm corresponding to the static grinding disc vibration sensor and the static grinding disc pulse impact sensor on the monitoring alarm device according to the emergency degree of the monitoring data. The application relates to the high-speed PLC subsystem which receives a first-level alarm and a second-level alarm corresponding to the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and monitoring signals of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor, and is used for carrying out secondary processing on the monitoring data to obtain a primary alarm and a high-level alarm. The application relates to the high-speed PLC subsystem which receives an alarm signal output by the alarm signal processing and transferring module, and outputs a single control cycle time of a driving instruction to the driving module, and the single control cycle time is limited to be less than or equal to 5 ms. In a continuous control cycle, when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the first time, the feed-forward and feed-backward control device controls the dynamic grinding disc to execute first-time feed-backward movement; when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the driving module for the second time, the feed-forward and feed-backward control device controls the dynamic grinding disc to execute second-time feed-backward movement. ​ ​ When the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the third time, the in-out tool control device controls the dynamic grinding disc to perform a third time of tool retraction; when the high-speed PLC subsystem outputs a primary alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module for the fourth time, the in-out tool control device controls the dynamic grinding disc to perform a fourth time of tool retraction and retraction to the maximum opening degree; When the high-speed PLC subsystem outputs a high-level alarm corresponding to the static grinding disc vibration sensor or the static grinding disc pulse impact sensor to the drive module, the in-out tool control device controls the dynamic grinding disc to perform tool retraction and retraction to the maximum opening degree.

2. The high consistency refining plant protection control system of claim 1, wherein, The grinding disc module is provided with a first lubricating device for providing a lubricating medium to the dynamic grinding disc and a sealing water supply device for sealing and isolating the grinding space in the grinding disc module from the external space; The drive module is provided with a second lubricating device for providing a lubricating medium to the high-voltage asynchronous motor and the in-out tool control device and a cooling water supply device for reducing the operating temperature of the high-voltage asynchronous motor and the in-out tool control device.

3. The high consistency refining plant protection control system of claim 2, wherein, The sensor module is provided with a first temperature sensor, a first flow sensor, a liquid level sensor and a pressure sensor in the first lubricating device and the second lubricating device, and is used to monitor the operating state of the first lubricating device and the second lubricating device and output to the high-speed PLC subsystem; The sensor module is provided with a second temperature sensor and a second flow sensor in the sealing water supply device and the cooling water supply device, and is used to monitor the operating state of the sealing water supply device and the cooling water supply device and output to the high-speed PLC subsystem.

4. The high consistency refining equipment protection control system of claim 1, wherein, The sensor module is further provided with a grinding disc gap sensor and a limit switch in the grinding disc module, the grinding disc gap sensor is used to monitor the gap value between the dynamic grinding disc and the static grinding disc and output to the high-speed PLC subsystem, and the limit switch is used to limit the movement stroke of the dynamic grinding disc.

5. The high consistency refining equipment protection control system of claim 1, wherein, The monitoring alarm device converts the monitoring data of the static grinding disc vibration sensor and the static grinding disc pulse impact sensor into 4-20 mA standard monitoring signals and outputs them to the high-speed PLC subsystem.

6. The high consistency refining plant protection control system of claim 5, wherein, The primary alarm or secondary alarm output by the monitoring alarm device and the primary alarm or high-level alarm output by the high-speed PLC subsystem are subjected to AND logic calculation, when the alarm level of the primary alarm or secondary alarm output by the monitoring alarm device is the same as the alarm level of the primary alarm or high-level alarm output by the high-speed PLC subsystem, the high-speed PLC subsystem outputs the driving instruction corresponding to the alarm level to the driving module; when the alarm level of the primary alarm or secondary alarm output by the monitoring alarm device is different from the alarm level of the primary alarm or high-level alarm output by the high-speed PLC subsystem, the high-speed PLC subsystem outputs the driving instruction corresponding to the lower alarm level to the driving module.

7. The high consistency refining equipment protection control system of claim 1, wherein, The forward and backward knife control device is provided with a position control mode, and the forward and backward knife control device adjusts the moving speed of the moving grinding disc according to the real-time position of the moving grinding disc.

8. The high consistency refining plant protection control system of claim 7, wherein, The forward and backward knife control device is also provided with a power control mode, and the forward and backward knife control device adjusts the moving speed of the moving grinding disc according to the real-time required input power of the moving grinding disc.

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