Defoaming discharge system for ceramic slurry
By using pressure switches and interlocking devices in the ceramic slurry discharge system, filter blockage can be detected and addressed promptly, solving the problem of blockage in the ceramic slurry discharge pipe. This achieves an efficient and stable discharge process, ensuring product quality and production continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG VIIYONG ELECTRONIC TECH CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-29
Smart Images
Figure CN224292595U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of defoaming ceramic slurry for multilayer ceramic chip capacitors, and in particular to a defoaming discharge system for ceramic slurry. Background Technology
[0002] In the manufacturing process of multilayer ceramic chip capacitors (MLCCs), the ceramic slurry is a key raw material, and the removal of internal air bubbles directly affects the reliability and electrical performance of the device. Traditional defoaming processes mainly rely on a combination of mechanical stirring and vacuum treatment to defoam the ceramic slurry in a defoaming tank.
[0003] After defoaming in the defoaming tank, a discharge operation is required. Because ceramic slurry has a high solids content, the filter element in the discharge pipe is prone to clogging due to particle accumulation during long-term operation. This can cause ceramic slurry retention or discharge interruption, resulting in excessively long residence time of the ceramic slurry in the defoaming tank, which affects product quality. Utility Model Content
[0004] Based on this, this application provides a defoaming and discharge system for ceramic slurry that can solve the above-mentioned technical problems.
[0005] The above-mentioned objective of this application is achieved through the following technical solution:
[0006] This application provides a defoaming and discharge system for ceramic slurry, comprising:
[0007] A defoaming tank is provided with an air inlet valve and a pressure relief valve. The air inlet valve is located on the pressurizing gas pipeline and is used to control the pressurizing gas entering the defoaming tank.
[0008] A discharge pipe is provided for conveying ceramic slurry from the defoaming tank to the discharge tank, and a filter is provided on the discharge pipe.
[0009] A pressure switch is provided on the defoaming tank, and the pressure switch is used to detect whether the pressure inside the defoaming tank exceeds the upper limit value;
[0010] An interlocking device is provided, which is connected to the pressure switch, the air inlet valve, and the pressure relief valve respectively. When the pressure in the defoaming tank is detected to exceed the high limit, the interlocking device receives a switching signal sent by the pressure switch, and simultaneously closes the air inlet valve and simultaneously opens the pressure relief valve.
[0011] In one exemplary embodiment, the interlocking device includes a first intermediate relay and a second intermediate relay;
[0012] The output terminal of the pressure switch is connected to the coil terminals of the first intermediate relay and the second intermediate relay, respectively; the contact terminal of the first intermediate relay is connected to the air intake valve, and the contact terminal of the second intermediate relay is connected to the pressure relief valve.
[0013] The switching signal energizes or de-energizes the coil terminals of the first and second intermediate relays, thereby driving the first and second intermediate relays to operate, which in turn drives the intake valve to close and the pressure relief valve to open.
[0014] In one exemplary embodiment, a power module is also included, which is connected to the pressure switch, the first intermediate relay, the second intermediate relay, the intake valve, and the pressure relief valve, respectively.
[0015] In an exemplary embodiment, a pressure regulating valve is also provided on the pressurizing gas pipeline, the pressure regulating valve being used to regulate the inlet pressure of the pressurizing gas pipeline.
[0016] In one exemplary embodiment, a touchscreen is also included, which is connected to the pressure switch, the first intermediate relay, the second intermediate relay, the intake valve, and the pressure relief valve.
[0017] In one exemplary embodiment, a level sensor is also provided on the top of the defoaming tank. The level sensor is used to detect the level of ceramic slurry in the defoaming tank and send the level signal to the touch screen for display.
[0018] This application has the following beneficial effects:
[0019] This application uses a pressure switch to directly detect whether the pressure inside the deaerator exceeds a high limit, thereby determining whether the filter element is clogged. When the deaerator process is normal, the pressure switch remains in its normal position; however, when the filter element is clogged, the pressure inside the deaerator increases, triggering the pressure switch to output a switching signal that directly drives the first and second intermediate relays, thereby simultaneously closing the intake valve and opening the pressure relief valve. This design features fast response, simple control logic, and is suitable for direct trigger control of filter element clogging, simplifying the system's detection and response process. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a defoaming and discharge system for ceramic slurry in an exemplary embodiment;
[0021] Figure 2 This is a schematic diagram of the interlocking device in an exemplary embodiment;
[0022] Figure 3This is a schematic diagram of the interlocking device in an exemplary embodiment.
[0023] Explanation of icon numbers:
[0024] 10. Defoaming tank; 20. Discharge tank; 30. Discharge pipe; 40. Filter; 51. Pressurizing gas pipe; 52. Pressure regulating valve; 53. Air inlet valve; 60. Pressure relief valve; 71. Pressure sensor; 72. PLC controller; 73. Touch screen; 74. 24V power supply; 75. First intermediate relay; 76. Second intermediate relay. Detailed Implementation
[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application is provided below. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0030] To address the technical problems in the background art, this application provides a defoaming and discharge system for ceramic slurry, which is used to efficiently discharge the ceramic slurry after defoaming.
[0031] like Figure 1 As shown, in one embodiment, the defoaming and discharge system for ceramic slurry includes a defoaming tank 10 and a discharge tank 20. The defoaming tank 10 is used to defoam the ceramic slurry and is equipped with a stirring assembly and a vacuum system. The stirring assembly is used to uniformly disperse the ceramic slurry and accelerate the rise of bubbles, while the vacuum system reduces the pressure inside the defoaming tank, causing tiny bubbles in the ceramic slurry to escape, thereby improving the defoaming efficiency.
[0032] To transport the defoamed ceramic slurry to the discharge tank 20, the ceramic slurry defoaming discharge system of this application utilizes a pressurized conveying method. Specifically, an air inlet valve 53 is provided on the defoaming tank 10, which is connected to a pressurizing gas (such as nitrogen) through a pressurizing gas pipeline 51. When the air inlet valve 53 is opened, the pressurizing gas is introduced into the defoaming tank 10, applying pressure to the ceramic slurry and pushing it towards the discharge pipeline 30. In some embodiments, a manual or automatic valve may also be provided on the discharge pipeline 30.
[0033] The discharge pipe 30 is connected between the defoaming tank 10 and the discharge tank 20, and a filter 40 is provided on the discharge pipe 30. Before the ceramic slurry flows through the discharge pipe 30 into the discharge tank 20, it needs to pass through the filter 40 to remove impurities or incompletely dispersed particles in the ceramic slurry, ensuring that the quality of the ceramic slurry meets the process requirements.
[0034] After the discharge operation is completed, the defoaming discharge system of the ceramic slurry of this application releases the pressure inside the tank through the pressure relief valve 60, ensuring the stable storage of the ceramic slurry in the discharge tank 20 and preparing for the next defoaming discharge process.
[0035] During the discharge process of ceramic slurry, because the slurry contains a large number of solid particles, these particles may gradually accumulate on the surface of the filter element as they flow through the filter 40 on the discharge pipe 30, causing the filter element to become clogged. As the filter element becomes clogged, the flow of ceramic slurry is obstructed, resulting in a decrease in discharge speed and affecting the production rhythm. If the clogging is not detected in time, it will also cause the ceramic slurry to remain in the defoaming tank 10 for too long, thus affecting product quality.
[0036] In order to solve the problem of filter element clogging during the discharge process, this application detects whether the filter element of the filter 40 is clogged, so that when clogging occurs, the machine can be stopped in time to replace or clean the filter element.
[0037] In an alternative embodiment, such as Figure 1 and Figure 2 As shown, the defoaming and discharge system for ceramic slurry of this application further includes a pressure sensor 71, a PLC controller 72, a first intermediate relay 75, and a second intermediate relay 76. The pressure sensor 71 is signal-connected to the PLC controller 72. The PLC controller 72 is connected to the coil terminals of the first intermediate relay 75 and the second intermediate relay 76 to drive them. The contact terminals of the first intermediate relay 75 are connected to the air inlet valve 53, and the contact terminals of the second intermediate relay 76 are connected to the pressure relief valve 60.
[0038] A pressure sensor 71 is installed on the defoaming tank 10 to detect the pressure value inside the defoaming tank 10 and send the pressure signal to the PLC controller 72. In this embodiment, the pressure sensor 71 can specifically be a digital vacuum gauge, which can detect the vacuum level inside the defoaming tank 10 during the vacuum defoaming process and also detect the pressure value inside the defoaming tank during the discharge process. Specifically, in this embodiment, the pressure signal sent by the pressure sensor 71 to the PLC controller 72 is a 4-20mA analog signal.
[0039] The PLC controller 72 determines whether the pressure value in the defoaming tank 10 has reached the high limit based on the pressure signal value. If the high limit is reached, the PLC controller 72 outputs a control signal to control the first intermediate relay 75 and the second intermediate relay 76 to drive the air inlet valve 53 to close and the pressure relief valve 60 to open, thereby stopping the discharge operation to replace or clean the filter element.
[0040] Specifically, the upper limit can be equal to or slightly less than the pressure of the pressurizing gas. In either of these cases, it indicates that the filter element has become severely clogged.
[0041] In other examples, when the pressure is detected to be below a certain set value, i.e. when the filter element is somewhat clogged, an alarm or touch screen will be output to remind the operator to intervene in time. The operator can then manually close the intake valve 53 and manually open the pressure relief valve to prevent more serious clogging.
[0042] In this embodiment, as Figure 2 As shown, it also includes a power supply module 74, which is used to supply power to the components of the defoaming and discharge system for ceramic slurry in this embodiment of the application.
[0043] In this embodiment, the PLC controller 72, the first intermediate relay 75, and the second intermediate relay 76 constitute an interlocking device. In other embodiments, the interlocking device may also be composed of other existing control circuits or control modules. The interlocking device is used to receive the pressure signal sent by the pressure sensor, and when the pressure signal exceeds the high limit, it will close the intake valve and open the pressure relief valve in conjunction with the pressure sensor.
[0044] In this embodiment, the air pressure inside the defoaming tank 10 will rise when the filter element is clogged. The air pressure value inside the defoaming tank 10 is detected and compared with the set high limit value to determine whether the filter element is clogged.
[0045] In another embodiment for detecting whether a filter cartridge is clogged, such as Figure 1 and Figure 3 As shown, the defoaming and discharge system for ceramic slurry of this application includes a pressure switch (pressure sensor 71), a first intermediate relay 75, and a second intermediate relay 76. The output terminal of the pressure switch is connected to the coil terminals of the first intermediate relay 75 and the second intermediate relay 76, respectively. The contact terminal of the first intermediate relay 75 is connected to the air inlet valve 53, and the contact terminal of the second intermediate relay 76 is connected to the pressure relief valve 60.
[0046] The pressure switch is used to detect whether the pressure value in the defoaming tank 10 exceeds the set high limit. When the pressure value exceeds the set high limit, the pressure switch outputs a switch signal. The switch signal energizes or de-energizes the coil terminals of the first intermediate relay 75 and the second intermediate relay 76, thereby driving the first intermediate relay 75 and the second intermediate relay 76 to operate, thereby driving the air intake valve 53 to close and the pressure relief valve 60 to open.
[0047] In this embodiment, the first intermediate relay 75 and the second intermediate relay 76 constitute an interlocking device. In other embodiments, the interlocking device may also be composed of other existing control circuits or control modules. The interlocking device is used to receive the switching signal sent by the pressure switch, and to close the intake valve and open the pressure relief valve in a coordinated manner.
[0048] In this embodiment, as Figure 3 As shown, it also includes a power supply module 74, which is used to supply power to the components of the defoaming and discharge system for ceramic slurry in this embodiment of the application.
[0049] This application utilizes sensors to collect the pressure inside the defoaming tank and converts it into a 4-20mA analog signal, which is then sent to a PLC controller. The PLC controller determines whether the filter element on the discharge pipeline is clogged based on a set pressure limit. When the pressure exceeds the limit, it outputs a control signal to simultaneously close the air inlet valve and open the pressure relief valve, thereby stopping the discharge. This effectively improves the accuracy and response speed of clogging detection and prevents ceramic slurry from remaining in the defoaming tank for too long, thus ensuring the stability of product quality.
[0050] On the other hand, this application employs a pressure switch to directly detect whether the pressure inside the deaerator exceeds a high limit, thereby determining whether the filter element is clogged. When the deaerator process is proceeding normally, the pressure switch remains in its normal state; however, when the filter element is clogged, the pressure inside the deaerator increases, triggering the pressure switch to output a switching signal that directly drives the first and second intermediate relays, thereby simultaneously closing the intake valve and opening the pressure relief valve. This approach offers fast response and simple control logic, making it suitable for direct trigger control of filter element clogging and simplifying the system's detection and response process.
[0051] like Figure 2 As shown, in one embodiment, the ceramic slurry defoaming and discharge system of this application further includes a touch screen 73. The touch screen is mainly used for human-machine interaction (HMI) in this system to realize visual control of discharge and filter element replacement. Its functions include:
[0052] Discharge control: When the operator clicks the "Automatic Discharge" button, the PLC controller 72 is triggered to open the air inlet valve 53 and start the discharge process, while the discharge start time is recorded.
[0053] Filter replacement management: When the filter element becomes clogged, the PLC controller 72 outputs an alarm signal to the touchscreen 73. In this embodiment, after the alarm signal is triggered, the operator must first click the "Replace Filter Element" button before the PLC controller 72 closes the intake valve 53 and opens the pressure relief valve 60 to complete the pressure relief and replace the filter element. During the filter replacement process, the touchscreen 73 records the start and end times of the filter replacement to ensure traceability of the maintenance process.
[0054] Status monitoring and alarm prompts: Real-time display of data from pressure sensor 71, differential pressure sensor, or flow sensor allows operators to monitor the filter element status. When the pressure, differential pressure, or flow rate exceeds the upper limit, the touchscreen triggers an alarm prompting a replacement of the filter element. After discharge is completed, if the pressure falls below the discharge completion pressure threshold, the touchscreen triggers a discharge completion alarm and records the discharge time.
[0055] In one embodiment, such as Figure 1 As shown, a pressure regulating valve 52 is also installed on the pressurizing gas pipeline 51, and the pressure regulating valve 52 is connected to the PLC controller 72. A material level sensor (not shown) is also installed on the top of the defoaming tank 10. The material level sensor is used to detect the material level of the ceramic slurry in the defoaming tank 10 and send the material level signal to the PLC controller 72.
[0056] In this embodiment, when the PLC controller 72 determines that the height of the ceramic slurry in the defoaming tank 10 is greater than the first set material level based on the material level signal, it directly determines whether the pressure value in the defoaming tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipe, or the flow rate of the ceramic slurry in the discharge pipe has reached the high limit value. If the high limit value is reached, the PLC controller 72 outputs a control signal to stop the discharge operation in order to replace or clean the filter element.
[0057] When the PLC controller 72 determines, based on the material level signal, that the height of the ceramic slurry in the defoaming tank 10 is less than the first set material level but greater than the second set material level, before the pressure value in the defoaming tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipe 30, or the flow rate of the ceramic slurry in the discharge pipe reach the high limit value, the PLC controller 72 also determines whether the above parameters have reached the middle limit value, where the middle limit value is lower than the high limit value. When the above parameters reach the middle limit, the PLC controller 72 outputs a control signal to activate the pressure regulating valve 52, thereby reducing the air pressure output from the pressurizing gas pipe 51 to the defoaming tank 10, thus reducing the pressure in the defoaming tank 10 and the flow rate of the ceramic slurry in the discharge pipe 30, thereby alleviating the congestion.
[0058] When the PLC controller 72 determines that the height of the ceramic slurry in the defoaming tank 10 is less than the second set material level based on the material level signal, it indicates that the discharge process is nearing completion. At this stage, if the PLC controller 72 determines that the pressure value in the defoaming tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipe, or the flow rate of the ceramic slurry in the discharge pipe has reached the high limit value, the PLC controller 72 will not take any action, that is, it will not stop the discharge operation, so as to directly complete the discharge process and reduce production interruption time.
[0059] This application embodiment also dynamically adjusts the discharge strategy by combining the material level signal and the pressure inside the defoaming tank to optimize the filter element's service life and improve discharge efficiency. When the material level is higher than the first set value, if the pressure reaches the high limit, the PLC controller directly stops the discharge to avoid severe clogging of the filter element at high liquid levels and ensure timely replacement or cleaning of the filter element. When the material level is between the first and second set values, if the parameter reaches the middle limit, the PLC controller reduces the pressure of the pressing gas and the flow rate of the ceramic slurry to alleviate the tendency of filter element clogging and extend the service life of the filter element, while avoiding sudden shutdowns that affect the production rhythm. When the material level is lower than the second set value, it indicates that the discharge process is nearing completion. At this time, even if the pressure exceeds the high limit, the PLC controller will no longer take intervention measures to ensure smooth discharge, reduce unnecessary downtime and filter element replacement, and improve production continuity.
[0060] This embodiment combines multiple factors such as liquid level, pressure, and flow rate to dynamically adjust the discharge strategy, thereby achieving early relief of filter element clogging, precise control, and maximization of production efficiency.
[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims, and the specification can be used to interpret the content of the claims.
Claims
1. A defoaming and discharge system for ceramic slurry, characterized in that, include: A defoaming tank is provided with an air inlet valve and a pressure relief valve. The air inlet valve is located on the pressurizing gas pipeline and is used to control the pressurizing gas entering the defoaming tank. A discharge pipe is provided for conveying ceramic slurry from the defoaming tank to the discharge tank, and a filter is provided on the discharge pipe. A pressure switch is provided on the defoaming tank, and the pressure switch is used to detect whether the pressure inside the defoaming tank exceeds the upper limit value; An interlocking device is provided, which is connected to the pressure switch, the air inlet valve, and the pressure relief valve respectively. When the pressure in the defoaming tank is detected to exceed the high limit, the interlocking device receives a switching signal sent by the pressure switch, and simultaneously closes the air inlet valve and simultaneously opens the pressure relief valve.
2. The defoaming and discharge system for ceramic slurry according to claim 1, characterized in that: The interlocking device includes a first intermediate relay and a second intermediate relay; The output terminal of the pressure switch is connected to the coil terminals of the first intermediate relay and the second intermediate relay, respectively; the contact terminal of the first intermediate relay is connected to the air intake valve, and the contact terminal of the second intermediate relay is connected to the pressure relief valve. The switching signal energizes or de-energizes the coil terminals of the first and second intermediate relays, thereby driving the first and second intermediate relays to operate, which in turn drives the intake valve to close and the pressure relief valve to open.
3. The defoaming and discharge system for ceramic slurry according to claim 2, characterized in that: It also includes a power module, which is connected to the pressure switch, the first intermediate relay, the second intermediate relay, the intake valve and the pressure relief valve respectively.
4. The defoaming and discharge system for ceramic slurry according to claim 2, characterized in that: The pressurizing gas pipeline is also equipped with a pressure regulating valve, which is used to regulate the inlet pressure of the pressurizing gas pipeline.
5. The defoaming and discharge system for ceramic slurry according to claim 4, characterized in that: It also includes a touch screen, which is connected to the pressure switch, the first intermediate relay, the second intermediate relay, the intake valve, and the pressure relief valve.
6. The defoaming and discharge system for ceramic slurry according to claim 5, characterized in that: The top of the defoaming tank is also equipped with a material level sensor, which is used to detect the material level of the ceramic slurry in the defoaming tank and send the material level signal to the touch screen for display.