Defoaming and discharging system for ceramic slurry

Abstract

The invention relates to a ceramic slurry defoaming and discharging system which comprises a defoaming tank, a discharging pipeline, a pressure sensor and an interlocking device, an air inlet valve and a pressure release valve are arranged on the defoaming tank, and the air inlet valve is arranged on a material pressing gas pipeline and used for controlling material pressing gas to enter the defoaming tank; the discharging pipeline is used for conveying the ceramic slurry from the defoaming tank to the discharging tank, and a filter is arranged on the discharging pipeline; the pressure sensor is arranged on the defoaming tank and is used for detecting the pressure in the defoaming tank; the interlocking device is respectively connected with the pressure sensor, the air inlet valve and the pressure release valve; the interlocking device receives a pressure signal sent by the pressure sensor, and when the pressure signal exceeds a high limit value, the air inlet valve is closed in a linkage mode, and the pressure release valve is opened in a linkage mode. When the filter element of the filter on the discharging pipeline is judged to be blocked, the air inlet valve is closed and the pressure release valve is opened in a linkage manner, so that discharging is stopped; and the ceramic slurry is prevented from staying in the defoaming tank for a long time, so that the stability of product quality is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of degassing ceramic slurry for chip-type multilayer ceramic capacitors, and in particular to a degassing and discharging system for ceramic slurry. Background Art

[0002] In the manufacturing process of multilayer ceramic capacitors (MLCC), ceramic slurry is a key raw material, and the removal of bubbles inside it directly affects the reliability and electrical performance of the device. The traditional degassing process mainly relies on the combination of mechanical stirring and vacuum treatment to degas the ceramic slurry in the degassing tank.

[0003] After the defoaming tank is debubbled, the discharge operation needs to be carried out. Since the ceramic slurry contains a high solid content, the filter element of the filter on the discharge pipe is easily blocked due to particle accumulation during long-term operation. This causes the ceramic slurry to be retained or the discharge to be interrupted, causing the ceramic slurry to stay in the debubbling tank for too long, affecting the product quality. Summary of the invention

[0004] Based on this, the present application provides a defoaming and discharging system for ceramic slurry that can solve the above-mentioned technical problems.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0006] The present application provides a defoaming and discharging system for ceramic slurry, comprising:

[0007] A debubble tank, wherein the debubble tank is provided with an air inlet valve and a pressure relief valve, wherein the air inlet valve is provided on a pressurized gas pipeline and is used to control the pressurized gas to enter the debubble tank;

[0008] A discharge pipe, the discharge pipe is used to transport the ceramic slurry from the defoaming tank to the discharge tank, and a filter is provided on the discharge pipe;

[0009] A pressure sensor, the pressure sensor is arranged on the debubble tank, and the pressure sensor is used to detect the pressure in the debubble tank;

[0010] An interlocking device is respectively connected to the pressure sensor, the intake valve and the pressure relief valve; the interlocking device receives a pressure signal sent by the pressure sensor, and when the pressure signal exceeds a high limit, the intake valve is closed and the pressure relief valve is opened.

[0011] In an exemplary embodiment, the interlocking device includes a PLC controller, a first intermediate relay, and a second intermediate relay;

[0012] The pressure sensor is connected to the PLC controller in a signal - connection manner. The PLC controller is respectively connected to the coil terminals of the first intermediate relay and the second intermediate relay. The intake valve is connected to the contact terminal of the first intermediate relay, and the pressure - relief valve is connected to the contact terminal of the second intermediate relay.

[0013] The pressure sensor is used to send the pressure signal to the PLC controller. The PLC controller judges whether the pressure signal exceeds the high - limit value, and when it exceeds the high - limit value, it outputs a control signal to the first intermediate relay and the second intermediate relay, so that the first intermediate relay closes the intake valve and the second intermediate relay opens the pressure - relief valve.

[0014] In an exemplary embodiment, a level sensor is further provided at the top of the defoaming tank. The level sensor is used to detect the level of the ceramic slurry in the defoaming tank and send a level signal to the PLC controller.

[0015] In an exemplary embodiment, the PLC controller acquires the signal of the level sensor and judges whether the level is greater than the first set level. When the level is greater than the first set level and the pressure signal exceeds the high - limit value, the PLC controller closes the intake valve and opens the pressure - relief valve.

[0016] In an exemplary embodiment, a pressure - regulating valve is further provided on the pressure - feeding gas pipeline. The PLC controller is connected to the pressure - regulating valve.

[0017] When the pressure signal exceeds the medium - limit value but does not reach the high - limit value, the PLC controller controls the pressure - regulating valve to lower the pressure of the pressure - feeding gas pipeline to reduce the flow rate of the ceramic slurry in the discharge pipeline.

[0018] In an exemplary embodiment, after the PLC controller controls the pressure - regulating valve to lower the pressure of the pressure - feeding gas pipeline, if the pressure signal exceeds the high - limit value, the PLC controller closes the intake valve and opens the pressure - relief valve.

[0019] In an exemplary embodiment, the PLC controller also judges whether the level is less than the second set level. If so, when the pressure signal exceeds the high - limit value, the PLC controller keeps the intake valve in the open state and keeps the pressure - relief valve in the closed state to complete the discharge of the current batch.

[0020] In an exemplary embodiment, a touch screen is further included. The touch screen is connected to the PLC controller. The touch screen is used to display the real - time level and pressure status in the defoaming tank and provide an alarm confirmation function.

[0021] This application has the following beneficial effects:

[0022] On the one hand, the present application utilizes a sensor to collect the pressure inside the debubbling tank, and converts it into a 4-20mA analog signal and sends it to the interlocking device. The interlocking device determines whether the filter element of the filter on the discharge pipe is blocked by the set high pressure limit, and outputs a control signal when the pressure exceeds the high limit, thereby closing the air intake valve and opening the pressure relief valve in conjunction to stop the discharge; it can effectively improve the accuracy and response speed of blockage detection; at the same time, it can prevent the ceramic slurry from staying in the debubbling tank for too long, thereby ensuring the stability of product quality.

[0023] The present application also dynamically adjusts the discharging strategy by combining the material level signal with the pressure in the defoaming tank to optimize the service life of the filter element and improve the discharging efficiency; when the material level is higher than the first set value, if it is detected that the pressure has reached the high limit, the PLC controller directly stops discharging to avoid serious clogging of the filter element at high liquid levels and ensure that the filter element is replaced or cleaned in time; when the material level is between the first set value and the second set value, if it is detected that the parameter has reached the middle limit, the PLC controller reduces the pressure gas pressure, reduces the flow rate of the ceramic slurry, alleviates the clogging tendency of the filter element, extends the service life of the filter element, and avoids sudden shutdowns that affect the production rhythm; when the material level is lower than the second set value, indicating that the discharging process is nearing completion, even if the pressure is detected to exceed the high limit, the PLC controller will no longer take intervention measures to ensure that the discharging is completed smoothly, reduce unnecessary shutdowns and filter element replacements, and improve production continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a defoaming and discharging system for ceramic slurry in an exemplary embodiment;

[0025] Figure 2 is a schematic structural diagram of an interlocking device in an exemplary embodiment;

[0026] Figure 3 Schematic diagram of the structure of an interlocking device in an exemplary embodiment.

[0027] Description of Figure Numbers:

[0028] 10. Defoaming tank; 20. Discharging tank; 30. Discharging pipe; 40. Filter; 51. Pressurizing gas pipe; 52. Pressure regulating valve; 53. 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 DESCRIPTION

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0031] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0034] To address the technical problems in the background art, this application provides a defoaming and discharging system for ceramic slurry, which is used to efficiently discharge the ceramic slurry after defoaming.

[0035] As Figure 1 shown, in one embodiment, the defoaming and discharging system for ceramic slurry includes a defoaming tank 10 and a discharging tank 20. Among them, the defoaming tank 10 is used to defoam the ceramic slurry, and is internally provided with a stirring assembly and a vacuum system. The stirring assembly is used to uniformly disperse the ceramic slurry and accelerate the floating of bubbles, while the vacuum system promotes the escape of tiny bubbles in the ceramic slurry by reducing the pressure inside the defoaming tank, thereby improving the defoaming efficiency.

[0036] To transport the defoamed ceramic slurry to the discharging tank 20, the defoaming and discharging system for ceramic slurry in this application uses a pressurized transportation method. Specifically, an air inlet valve 53 is provided on the defoaming tank 10, and the air inlet valve 53 is connected to a pressurizing gas (such as nitrogen) through a pressure feeding gas pipeline 51. When the air inlet valve 53 is opened, the pressurizing gas fills the defoaming tank 10, applies pressure to the ceramic slurry, and pushes the ceramic slurry to flow towards the discharging pipeline 30. In some embodiments, a manual valve or an automatic valve may also be provided on the discharging pipeline 30.

[0037] The discharging pipeline 30 is connected between the defoaming tank 10 and the discharging tank 20, and a filter 40 is provided on the discharging pipeline 30. Before the ceramic slurry flows through the discharging pipeline 30 and enters the discharging 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.

[0038] After the discharging operation is completed, the defoaming and discharging system for ceramic slurry in this application releases the pressure inside the tank through a pressure relief valve 60, ensuring the stable storage of the ceramic slurry in the discharging tank 20 and preparing for the next defoaming and discharging process.

[0039] During the discharging process of the ceramic slurry, since the ceramic slurry contains a large number of solid particles, these particles may gradually accumulate on the surface of the filter element when flowing through the filter 40 on the discharging pipeline 30, resulting in the blockage of the filter element. As the filter element is gradually blocked, the flow of the ceramic slurry is hindered, resulting in a decrease in the discharging speed, affecting the production rhythm; if the blockage condition cannot be detected in time, it will also cause the ceramic slurry to stay in the defoaming tank 10 for too long, thus affecting the product quality.

[0040] To solve the problem of filter element blockage during the discharging process, this application detects whether the filter element of the filter 40 is blocked, so that when it is blocked, the machine can be stopped in time to replace or clean the filter element.

[0041] In an alternative embodiment, as Figure 1 and Figure 2 shown, the defoaming and discharging system of the 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 ends of the first intermediate relay 75 and the second intermediate relay 76, and is used to drive the first intermediate relay 75 and the second intermediate relay 76. The contact end of the first intermediate relay 75 is connected to the intake valve 53, and the contact end of the second intermediate relay 76 is connected to the pressure relief valve 60.

[0042] The pressure sensor 71 is arranged on the defoaming tank 10, and is used to detect the pressure value in the defoaming tank 10 and send a pressure signal to the PLC controller 72. In this embodiment, the pressure sensor 71 can specifically be a digital vacuum gauge. The digital vacuum gauge can not only detect the vacuum degree in the defoaming tank 10 during the vacuum defoaming process of the ceramic slurry, but also detect the pressure value in the defoaming tank during the discharging process. Specifically, the pressure signal sent by the pressure sensor 71 of this embodiment to the PLC controller 72 is an analog quantity of 4 - 20 mA.

[0043] The PLC controller 72 judges whether the pressure value in the defoaming tank 10 reaches the high limit value according to the value of the pressure signal. If it reaches the high limit value, the PLC controller 72 outputs a control signal to control the first intermediate relay 75 and the second intermediate relay 76 to act, so as to drive the intake valve 53 to close and drive the pressure relief valve 60 to open, thereby stopping the discharging operation to replace or clean the filter element.

[0044] Specifically, the high limit value can be equal to the pressure of the pressure-feeding gas or slightly less than the pressure of the pressure-feeding gas. In these two situations, it indicates that the filter element has been seriously blocked.

[0045] In other examples, when it is detected that the pressure reaches a certain set value lower than the upper limit, that is, when the filter element is blocked to a certain extent, a filter element blockage alarm is output through an alarm or a touch screen to remind the operator to intervene in time, so that the operator can manually close the intake valve 53 and manually open the pressure relief valve to avoid more serious blockage.

[0046] In this embodiment, if Figure 2 As shown, it also includes a power module 74 for supplying power to various components of the ceramic slurry defoaming and discharging system of the embodiment of the present application.

[0047] 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 can 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. When the pressure signal exceeds the upper limit, the intake valve is closed and the pressure relief valve is opened.

[0048] In this embodiment, the air pressure in the debubble tank 10 will rise when the filter element is clogged. The air pressure value in the debubble tank 10 is detected and compared with a set high limit value to determine whether the filter element is clogged.

[0049] In another embodiment of detecting whether the filter element is clogged, Figure 1 and Figure 3 As shown, the defoaming and discharging system of the ceramic slurry of the present application includes a pressure switch (pressure sensor 71), a first intermediate relay 75 and a second intermediate relay 76, and the output end of the pressure switch is respectively connected to the coil ends of the first intermediate relay 75 and the second intermediate relay 76. The contact end of the first intermediate relay 75 is connected to the air intake valve 53, and the contact end of the second intermediate relay 76 is connected to the pressure relief valve 60.

[0050] The pressure switch is used to detect whether the pressure value in the defoaming tank 10 exceeds the set upper limit. When the pressure value exceeds the set upper limit, the pressure switch outputs a switch signal. The switch signal drives the first intermediate relay 75 and the second intermediate relay 76 to operate by energizing or de-energizing the coil ends of the first intermediate relay 75 and the second intermediate relay 76, so as to drive the intake valve 53 to close and drive the pressure relief valve 60 to open.

[0051] 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, to close the intake valve in a linked manner, and to open the pressure relief valve in a linked manner.

[0052] In this embodiment, if Figure 3As shown, it also includes a power module 74 for supplying power to various components of the ceramic slurry defoaming and discharging system of the embodiment of the present application.

[0053] On the one hand, the present application utilizes a sensor to collect the pressure inside the debubbling tank, and converts it into a 4-20mA analog signal and sends it to a PLC controller. The PLC controller determines whether the filter element of the filter on the discharge pipe is blocked by the set high pressure limit, and outputs a control signal when the pressure exceeds the high limit, thereby closing the air intake valve and opening the pressure relief valve to stop the discharge; it can effectively improve the accuracy and response speed of blockage detection; at the same time, it can prevent the ceramic slurry from staying in the debubbling tank for too long, thereby ensuring the stability of product quality.

[0054] On the other hand, the present application uses a pressure switch to directly detect whether the pressure in the debubble tank exceeds the upper limit, so as to determine whether the filter element is blocked. When the debubble process is normal, the pressure switch maintains normal state; but when the filter element is blocked, the pressure in the debubble tank increases, the pressure switch triggers action, outputs a switch signal, directly drives the first intermediate relay and the second intermediate relay, and then links to close the air intake valve and open the pressure relief valve; the response speed is fast, the control logic is simple, and it is suitable for direct trigger control of filter element blockage, which simplifies the detection and response process of the system.

[0055] like Figure 2 As shown, in one embodiment, the defoaming and discharging system of the ceramic slurry of the present application further includes a touch screen 73. The touch screen is mainly used for human-machine interaction (HMI) in the system to realize visual control of discharging and filter element replacement, and its functions include:

[0056] Discharging control: The operator clicks the "automatic discharging" button, triggering the PLC controller 72 to control the opening of the air inlet valve 53, starting the discharging process, and recording the discharging start time.

[0057] Filter replacement management: When the filter element is clogged, the PLC controller 72 outputs an alarm signal to the touch screen 73. After the alarm signal is triggered, in this embodiment, the operator needs to first click the "Replace filter element" button before the PLC controller 72 closes the air intake valve 53 and opens the pressure relief valve 60 to replace the filter element after the pressure relief is completed. During the filter element replacement process, the touch screen 73 records the start and end time of the filter element replacement to ensure that the maintenance process is traceable.

[0058] Status monitoring and alarm prompt: Real-time display of data from pressure sensor 71, differential pressure sensor or flow sensor for the operator to monitor the status of the filter element. When the pressure, differential pressure or flow exceeds the upper limit, the touch screen triggers an alarm prompt to remind the filter element to be replaced. After the discharge is completed, when the pressure is lower than the discharge completion pressure threshold, the touch screen triggers the discharge completion alarm and records the discharge time.

[0059] In one embodiment, ifFigure 1 As shown, a pressure regulating valve 52 is further provided on the pressure feeding gas pipeline 51, and the pressure regulating valve 52 is connected to the PLC controller 72. A level sensor (not shown) is further provided at the top of the degassing tank 10. The level sensor is used to detect the level of the ceramic slurry in the degassing tank 10 and send a level signal to the PLC controller 72.

[0060] In this embodiment, when the PLC controller 72 determines according to the level signal that the height of the ceramic slurry in the degassing tank 10 is greater than the first set level, it directly determines whether the pressure value in the degassing tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipeline, or the flow rate of the ceramic slurry in the discharge pipeline reaches the high limit value. If it reaches the high limit value, the PLC controller 72 outputs a control signal to stop the discharging operation to replace or clean the filter element.

[0061] When the PLC controller 72 determines according to the level signal that the height of the ceramic slurry in the degassing tank 10 is less than the first set level and greater than the second set level, before the pressure value in the degassing tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipeline 30, or the flow rate of the ceramic slurry in the discharge pipeline reaches the high limit value, the PLC controller 72 also determines whether the above parameters reach the medium limit value, where the medium limit value is lower than the high limit value. When the above parameters reach the medium limit, the PLC controller 72 outputs a control signal to cause the pressure regulating valve 52 to act, so as to reduce the air pressure output from the pressure feeding gas pipeline 51 to the degassing tank 10, thereby reducing the pressure in the degassing tank 10 and reducing the flow rate of the ceramic slurry in the discharge pipeline 30, thereby alleviating the aggravation of congestion.

[0062] When the PLC controller 72 determines according to the level signal that the height of the ceramic slurry in the degassing tank 10 is less than the second set level, it indicates that the discharging process is approaching completion. At this stage, when the PLC controller 72 determines that the pressure value in the degassing tank 10, the pressure difference between the front and rear sides of the filter in the discharge pipeline, or the flow rate of the ceramic slurry in the discharge pipeline reaches the high limit value, the PLC controller 72 does not act, that is, it does not stop the discharging operation to directly complete the discharging process and reduce the production interruption time.

[0063] The embodiments of the present application also dynamically adjust the discharging strategy by combining the material level signal and the pressure in the degassing tank to optimize the service life of the filter element and improve the discharging efficiency; when the material level is higher than the first set value, if it is detected that the pressure reaches the high limit value, the PLC controller directly stops discharging to avoid serious blockage of the filter element at high liquid level and ensure timely replacement or cleaning of the filter element; when the material level is between the first set value and the second set value, if it is detected that the parameter reaches the medium limit value, the PLC controller reduces the pressure of the pressure-feeding gas and reduces the flow rate of the ceramic slurry to relieve the trend of filter element blockage, extend the service life of the filter element, and at the same time avoid sudden shutdown affecting the production rhythm; when the material level is lower than the second set value, it indicates that the discharging process is approaching completion. At this time, even if it is detected that the pressure exceeds the high limit value, the PLC controller no longer takes intervention measures to ensure the smooth completion of discharging, reduce unnecessary shutdowns and filter element replacements, and improve production continuity.

[0064] This embodiment combines multiple factors such as liquid level, pressure, and flow rate to dynamically adjust the discharging strategy, achieving early relief, precise control of filter element blockage, and maximization of production efficiency.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0066] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims, and the specification can be used to explain the content of the claims.

Claims

1. A defoaming and discharging system for ceramic slurry, characterized in that: include: A debubble tank, wherein the debubble tank is provided with an air inlet valve and a pressure relief valve, wherein the air inlet valve is provided on a pressurized gas pipeline and is used to control the pressurized gas to enter the debubble tank; A discharge pipe, the discharge pipe is used to transport the ceramic slurry from the defoaming tank to the discharge tank, and a filter is provided on the discharge pipe; A pressure sensor, the pressure sensor is arranged on the debubble tank, and the pressure sensor is used to detect the pressure in the debubble tank; An interlocking device is respectively connected to the pressure sensor, the intake valve and the pressure relief valve; the interlocking device receives a pressure signal sent by the pressure sensor, and when the pressure signal exceeds a high limit, the intake valve is closed and the pressure relief valve is opened.

2. The defoaming and discharging system for ceramic slurry according to claim 1, characterized in that: The interlocking device comprises a PLC controller, a first intermediate relay and a second intermediate relay; The pressure sensor is connected to the PLC controller signal, and the PLC controller is connected to the coil ends of the first intermediate relay and the second intermediate relay respectively; the intake valve is connected to the contact end of the first intermediate relay, and the pressure relief valve is connected to the contact end of the second intermediate relay; The pressure sensor is used to send the pressure signal to the PLC controller; The PLC controller determines whether the pressure signal exceeds a high limit, and outputs a control signal to the first intermediate relay and the second intermediate relay when the pressure signal exceeds the high limit, so that the first intermediate relay closes the intake valve and the second intermediate relay opens the pressure relief valve.

3. The defoaming and discharging system for ceramic slurry according to claim 2, characterized in that: A material level sensor is also provided on the top of the debubbling tank, and the material level sensor is used to detect the material level of the ceramic slurry in the debubbling tank and send a material level signal to the PLC controller.

4. The defoaming and discharging system for ceramic slurry according to claim 3, characterized in that: The PLC controller obtains the signal of the material level sensor and determines whether the material level is greater than a first set material level; when the material level is greater than the first set material level and the pressure signal exceeds a high limit, the PLC controller closes the air inlet valve and opens the pressure relief valve.

5. The defoaming and discharging system for ceramic slurry according to claim 4, characterized in that: The pressure gas pipeline is also provided with a pressure regulating valve, and the PLC controller is connected to the pressure regulating valve; When the pressure signal exceeds the middle limit but does not reach the high limit, the PLC controller controls the pressure regulating valve to lower the pressure of the pressure gas pipeline to reduce the flow rate of the ceramic slurry in the discharge pipeline.

6. The defoaming and discharging system for ceramic slurry according to claim 5, characterized in that: After the PLC controller controls the pressure regulating valve to lower the pressure of the pressurized gas pipeline, if the pressure signal exceeds the upper limit, the PLC controller closes the air inlet valve and opens the pressure relief valve.

7. The defoaming and discharging system for ceramic slurry according to claim 6, characterized in that: The PLC controller also determines whether the material level is less than a second set material level. If so, when the pressure signal exceeds the upper limit, the PLC controller keeps the air inlet valve open and the pressure relief valve closed to complete the current batch of discharge.

8. The defoaming and discharging system for ceramic slurry according to claim 7, characterized in that: It also includes a touch screen, which is connected to the PLC controller and is used to display the real-time material level and pressure status in the defoaming tank and provide an alarm confirmation function.

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