Grinding disc protection system suitable for positive electrode material colloid mill
By installing acoustic and temperature sensors in the colloid mill, combined with a controller and alarm device, the problems of overheating and cracking of the grinding disc are solved, thus protecting the grinding disc, improving its service life and the stability of the crushing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EASPRING TECHNOLOGY (CHANGZHOU) NEW MATERIAL CO LTD
- Filing Date
- 2025-01-20
- Publication Date
- 2026-05-01
AI Technical Summary
In the prior art, the grinding disc of a colloid mill is prone to overheating and wear at high speeds and cannot effectively dissipate heat, resulting in a decline in grinding disc performance. At the same time, the entry of hard materials can easily cause the grinding disc to break, resulting in abnormal wear.
An acoustic sensor and a temperature sensor are installed in the colloid mill. The controller analyzes the acoustic and temperature signals and controls the alarm device and motor switch to achieve protection in abnormal situations and prevent the grinding disc from overheating and cracking.
It effectively prevents overheating and wear of the grinding disc and abnormal conditions, improves the service life of the grinding disc, avoids abnormal wear, and ensures stable operation of the crushing process.
Smart Images
Figure CN224180961U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of colloid mill technology, and more specifically, to a grinding disc protection system suitable for colloid mills of cathode materials. Background Technology
[0002] In the preparation of cathode materials, it is necessary to dissociate the particles that are bonded together by sintering through a crushing process. As one of the commonly used equipment for crushing cathode materials, the colloid mill is driven by an electric motor to rotate the moving grinding disc and the matching stationary grinding disc at high speed. The moving grinding disc rotates at high speed while the stationary grinding disc remains stationary. When the material passes through the gap between the moving and stationary grinding discs (the gap is adjustable), it is subjected to strong shearing force, friction force, high-speed vortex and other physical actions, which effectively deagglomerates and disperses the material, achieving the effect of fully dissociating the material to a suitable particle size.
[0003] Excessive rotational speed of the moving and stationary grinding discs may lead to excessive friction and heat accumulation. If the heat generated during grinding cannot be effectively dissipated, it may cause a decline in the performance of the grinding disc material. Currently, the cooling effect of cooling water cannot match the high overheating temperature, which will accelerate the wear of the grinding disc. At the same time, when hard materials or irregular foreign objects enter between the moving and stationary grinding discs, it may cause the grinding disc to suddenly break, resulting in abnormal wear and tear and wasted costs.
[0004] Therefore, how to provide a grinding disc protection system that can prevent overheating and wear of the grinding disc at high speeds and other abnormal conditions has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0005] The purpose of this invention is to provide a grinding disc protection system that can prevent overheating and wear of the grinding disc at high speeds and other abnormal conditions.
[0006] This utility model provides a grinding disc protection system suitable for a colloid mill for positive electrode materials, including a grinding cavity, and a stationary grinding disc and a moving grinding disc arranged opposite to each other in the grinding cavity;
[0007] An acoustic sensor, installed inside the grinding cavity, is used to collect acoustic data from the periphery of the stationary / moving grinding disc and send acoustic signals.
[0008] The controller can receive the acoustic wave signal and analyze and extract abnormal acoustic wave signals;
[0009] An alarm device, electrically connected to the controller, is used to issue an alarm under the action of the controller.
[0010] Optionally, the grinding disc protection system suitable for cathode material colloid mills also includes:
[0011] The motor is connected to the moving grinding disc via a transmission.
[0012] The first switch is installed on the power circuit of the motor and connected to the controller's electrical signal, and can connect or disconnect the power circuit under the action of the controller.
[0013] Optionally, the first switch is a relay.
[0014] Optionally, a temperature sensor for detecting the surface temperature of the stationary grinding disc is installed inside the grinding chamber. The temperature sensor is connected to the controller signal and sends a temperature signal.
[0015] The controller is used to analyze and extract abnormal temperature signals, and to control the activation and deactivation of the alarm device and / or the on / off state of the first switch.
[0016] Optionally, the grinding disc protection system suitable for cathode material colloid mills also includes:
[0017] The feeding device is connected to the grinding chamber and is used to supply material to the grinding chamber;
[0018] The feeding device is electrically connected to the controller.
[0019] The controller is used to stop the feeding device based on the abnormal acoustic signal; and / or to stop the feeding device based on the abnormal temperature signal.
[0020] Optionally, the feeding device includes a rotary feeder, the discharge port of which is connected to the feed port of the grinding chamber;
[0021] The star feeder is electrically connected to the controller.
[0022] Optionally, the grinding disc protection system suitable for cathode material colloid mills also includes:
[0023] The feed hopper is located above the grinding chamber, and the feeding device is connected between the discharge port of the feed hopper and the feed port of the grinding chamber.
[0024] Optionally, the alarm device includes an audible and visual alarm.
[0025] Optionally, the temperature sensor is a thermocouple temperature sensor.
[0026] Optionally, the grinding disc protection system suitable for cathode material colloid mills also includes:
[0027] The drive shaft is connected between the moving grinding disc and the output shaft of the motor.
[0028] Based on the technical content disclosed in this utility model, the following beneficial effects are achieved:
[0029] The present invention provides a grinding disc protection system for a colloid mill for positive electrode materials. An acoustic wave sensor is installed in the grinding chamber. The acoustic wave sensor detects the acoustic waves generated during the crushing operation of the stationary and moving grinding discs in real time and transmits the acoustic wave signals to the controller. The controller analyzes the changes in acoustic waves detected by the acoustic wave sensor and determines whether the colloid mill is malfunctioning based on the difference between the acoustic waves generated when the colloid mill is malfunctioning and those generated when the colloid mill is operating normally. When an abnormality is detected, an abnormal acoustic wave signal is sent to the alarm device, and the alarm device issues an alarm.
[0030] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description
[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.
[0032] Figure 1 This is a structural diagram of the grinding disc protection system for a colloid mill for positive electrode materials according to this utility model.
[0033] Explanation of reference numerals in the attached diagram: 1. Star feeder; 2. Discharge port; 3. Feed hopper; 4. Moving grinding disc; 5. Stationary grinding disc; 6. Motor; 7. Controller; 8. Alarm device; 9. Acoustic sensor; 10. Acoustic imager. Detailed Implementation
[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.
[0036] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.
[0037] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0038] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0039] The purpose of this invention is to solve the technical problems of overheating of the grinding disc in colloid mills, which leads to the inability of the cooling system to match, resulting in overheating and wear of the grinding disc, and the grinding disc breaking when encountering objects that exceed the crushing capacity and causing overload operation. The invention proposes a protection system suitable for colloid mill grinding discs.
[0040] See Figure 1 This utility model discloses a grinding disc protection system suitable for a colloid mill for positive electrode materials, including a colloid mill body, a temperature sensor, an acoustic sensor 9, an alarm device 8, a feeding device, and a controller 7. In an embodiment of this utility model, the temperature sensor is a thermocouple temperature sensor; the alarm device 8 is an audible and visual alarm.
[0041] The colloid mill body has a grinding chamber for crushing cathode materials. Inside the grinding chamber, a stationary grinding disc 5 and a moving grinding disc 4 are arranged opposite each other from top to bottom, with a certain gap reserved between them according to the required particle size. A motor 6 is located at the bottom of the colloid mill body, and the output shaft of the motor 6 is connected to the moving grinding disc 4 via a transmission shaft, causing the moving grinding disc 4 to rotate relative to the stationary grinding disc 5. A discharge port 2 communicating with the grinding chamber is provided on the side wall of the colloid mill body.
[0042] The controller 7 is located on the outer wall of the colloid mill body. The controller 7 includes a commercially available acoustic imager 10. The acoustic imager 10 can analyze sound waves and extract abnormal sound wave signals. The controller 7 can control the operation of the actuator based on the abnormal sound wave signals and signals from other signal acquisition devices. The specific structure and working principle of the controller will not be described in detail here.
[0043] In this application, the controller 7 has the functions of analyzing sound waves, extracting abnormal sound wave signals, and controlling the operation of the actuator. The functions of analyzing, extracting, and controlling the actuator are existing technologies, and the controller can be purchased commercially. The module with the function of analyzing sound waves and extracting abnormal sound wave signals can also be purchased commercially, such as the commercially available acoustic imager 10. Of course, the controller 7 is not limited to the module for analyzing sound waves and extracting abnormal sound wave signals, but also includes a temperature module, which can analyze and extract abnormal temperature signals, etc. Such functions can be implemented by integrating existing analysis and calculation modules. These modules are all mature technologies and will not be described in detail here. In short, the controller can control the on / off state of the actuator through the abnormal signals extracted by the acoustic imager or other analysis modules.
[0044] In this application, the controller 7 can also be connected to a temperature sensor and combined with an acoustic sensor to control the motor or feeder. For example, a first switch can be installed on the power circuit of the motor 6 to control the start and stop of the motor 6. The first switch can be a relay; or the start and stop of the feeder can be controlled directly.
[0045] Specifically, a temperature sensor, which can be a thermocouple temperature sensor, can be installed inside the grinding chamber to detect the temperature on the stationary grinding disc 5 and send a temperature signal to the controller 7. The controller 7 can analyze and compare the temperature signal, extract abnormal temperature signals, and control the audible and visual alarm to sound an alarm and control the relay to disconnect based on the abnormal temperature signal and / or abnormal sound wave signal. Of course, the temperature sensor can also be used to detect the temperature on the moving grinding disc 4 and send a temperature signal to the controller 7.
[0046] The feed hopper 3 is located above the grinding chamber, and the feeding device is connected between the discharge port of the feed hopper 3 and the feed port of the grinding chamber. Specifically, the feeding device includes a rotary feeder 1, the discharge port of which is connected to the feed port of the grinding chamber for feeding material into the grinding chamber. The rotary feeder 1 is electrically connected to the controller 7.
[0047] The acoustic sensor 9 is installed inside the grinding chamber with its detection direction facing the stationary grinding disc 5 and the moving grinding disc 4. It is used to monitor the sound generated when the stationary grinding disc 5 and the moving grinding disc 4 crush materials. The acoustic sensor 9 is electrically connected to the acoustic imager 10 in the controller 7. The acoustic imager 10 is used to analyze the changes in sound waves detected by the acoustic sensor 9. The controller 7 is also electrically connected to the audible and visual alarm. When the acoustic imager 10 detects abnormal sound wave characteristics (such as frequency change or amplitude abnormality), it controls the audible and visual alarm to issue an audible and visual alarm.
[0048] Working principle: The colloid mill is powered by motor 6, which drives the transmission shaft. Thermocouple temperature sensors are installed near the grinding disc surface, but not in direct contact with the stationary grinding disc 5, to avoid wear. The cathode material to be crushed enters the space between the stationary grinding disc 5 and the moving grinding disc 4 from the feed hopper 3 under its own gravity. As the material passes through the gap between the high-speed rotating stationary grinding disc 5 and the moving grinding disc 4 (the gap is adjustable), it is subjected to strong shearing force, friction, high-speed vortex and other physical actions, which effectively deagglomerates and disperses the material, achieving the effect of fully dissociating the material to a suitable particle size.
[0049] If the grinding discs of the colloid mill overheat during continuous crushing and the cooling system is unable to reduce the temperature to the normal control range, the stationary grinding disc 5 and the moving grinding disc 4 will overheat and wear. This wear may cause changes in the characteristics of the grinding discs (such as hardness and elasticity), affecting the propagation characteristics of sound waves in the grinding discs and grinding cavity, resulting in changes in the reflection, attenuation, and propagation speed of sound waves. At the same time, when foreign objects or harder materials enter the grinding cavity, the friction between them and the stationary grinding disc 5 and the moving grinding disc 4 will increase significantly. The frequency and intensity of the sound waves generated by this friction are usually different from the sound wave characteristics in the normal grinding process, resulting in abnormal sound wave signals received at the sound wave sensor.
[0050] During normal operation of the equipment, the acoustic sensor 9 collects acoustic data for a period of time and sends it to the controller 7. The controller 7 uses this data as the reference for normal acoustic waves and sets the normal acoustic wave threshold according to the acoustic wave characteristics of normal materials. At the same time, an audible and visual alarm is installed. When the acoustic imager 10 integrated in the controller 7 detects abnormal acoustic wave characteristics (such as frequency change or amplitude abnormality), the controller 7 controls the audible and visual alarm to issue an audible and visual alarm. Simultaneously, this application installs a first switch composed of a relay on the power circuit of the motor 6. When the acoustic imager 10 shows an abnormality and the audible and visual alarm issues an alarm, the controller 7 controls the relay to open, thereby cutting off the power supply to the motor 6 and stopping the drive. Finally, the controller 7 is also linked with the feeding system. A star feeder 1 is installed in the feeding system, and the acoustic imager 10 is linked with the feeding system. When the acoustic imager 10 detects an abnormal acoustic wave, it controls the star feeder 1 to shut down, thereby stopping the feeding. After the acoustic imager 10 detects a normal acoustic wave, it automatically starts the star feeder 1 and begins feeding.
[0051] In summary, the grinding disc protection system for colloid mills of cathode materials provided by this utility model solves the technical problems of grinding disc overheating and wear caused by the inability of the cooling system to match during the crushing of cathode materials by colloid mills, as well as grinding disc breakage when encountering objects exceeding the crushing capacity and causing overload operation.
[0052] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. A grinding disc protection system suitable for a colloid mill for positive electrode materials, characterized in that, include: A grinding cavity, and a stationary grinding disc and a moving grinding disc disposed opposite to each other within the grinding cavity; An acoustic sensor is installed inside the grinding cavity to collect acoustic data from the periphery of the stationary grinding disc / the moving grinding disc and send acoustic signals. The controller can receive the acoustic wave signal and analyze and extract abnormal acoustic wave signals; An alarm device is electrically connected to the controller and is used to issue an alarm under the action of the controller.
2. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 1, characterized in that, The system also includes: The motor is connected to the moving grinding disc in a transmission manner; The first switch is installed on the power circuit of the motor and connected to the controller via electrical signals. It can connect or disconnect the power circuit under the action of the controller.
3. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 2, characterized in that: A temperature sensor for detecting the surface temperature of the stationary grinding disc is installed inside the grinding chamber. The temperature sensor is connected to the controller and sends a temperature signal. The controller is used to analyze and extract abnormal temperature signals, and to control the activation and deactivation of the alarm device and / or the on / off state of the first switch.
4. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 2 or 3, characterized in that, The system also includes: A feeding device, which is connected to the grinding chamber, is used to supply material to the grinding chamber; The feeding device is electrically connected to the controller.
5. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 4, characterized in that: The feeding device includes a rotary feeder, the discharge port of which is connected to the feed port of the grinding chamber; The star feeder is electrically connected to the controller.
6. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 4, characterized in that, The system also includes: A feed hopper is located above the grinding chamber, and the feeding device is connected between the discharge port of the feed hopper and the feed port of the grinding chamber.
7. The grinding disc protection system for a colloid mill for positive electrode materials according to any one of claims 1 to 3, characterized in that: The alarm device includes an audible and visual alarm.
8. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 3, characterized in that: The temperature sensor is a thermocouple temperature sensor.
9. The grinding disc protection system for a colloid mill for positive electrode materials according to claim 2 or 3, characterized in that, The system also includes: A drive shaft is connected between the moving grinding disc and the output shaft of the motor.