Automatic ceramic glaze slip pumping system and method

Abstract

The invention relates to the technical field of building ceramic production, in particular to an automatic ceramic glaze slip pumping system which comprises a supply glaze cylinder used for storing glaze slip raw materials, a transfer glaze cylinder used for buffering and cooling and a glaze barrel used for glaze line production. A slurry supply pipeline is connected between the glaze supply cylinder and the glaze transfer cylinder; a liquid level sensor and a temperature sensor are arranged on the transfer glaze cylinder; a slurry conveying pipeline is connected between the glaze barrel and the transfer glaze cylinder, an inner circulating pump is arranged on the slurry conveying pipeline, an inlet of the inner circulating pump is communicated with the slurry conveying pipeline, a backflow pipeline is connected between an outlet of the inner circulating pump and an inlet of the transfer glaze cylinder, and the backflow pipeline is used for enabling part of glaze slurry to flow back into the transfer glaze cylinder; and thus, glaze slip self-circulation is formed. According to the invention, the transfer glaze cylinder is arranged as a buffer unit, and double closed-loop control of liquid level and temperature is combined, so that stable supply and performance guarantee in a glaze slip conveying process are realized.

Description

Technical Field

[0001] This invention relates to the field of building ceramics production technology, and in particular to an automatic pumping system and method for ceramic glaze slurry. Background Technology

[0002] In the production of ceramic wall and floor tiles, the preparation and supply of glaze slurry is a crucial step. The traditional glaze slurry supply process typically involves: sieving the glaze slurry in the ball glazing workshop and storing it in glaze buckets; after confirming the glaze slurry quality through firing tests, the buckets are manually transported to the glazing line using glaze carts, where the glaze slurry is then manually added to the glaze tanks. However, the glazing line and the ball glazing workshop are far apart, and the demand for glaze is large, requiring frequent glaze application and application by glaze handlers, resulting in high labor intensity and labor costs. Secondly, manual operation is prone to errors leading to serious quality accidents, and the glaze slurry is easily contaminated during transport and exposure, with significant losses due to spillage. Furthermore, the glaze slurry requires prolonged stirring in the glaze tanks of the ball glazing workshop to prevent sedimentation. This process causes the glaze slurry temperature to rise due to mechanical work and environmental influences. Since glaze slurry is temperature-sensitive, excessively high temperatures can degrade its properties, directly affecting the stability of the glazing process and ultimately leading to product defects.

[0003] To address the aforementioned issues, several automated conveying solutions have been developed in the prior art. For example, patent CN216992440U discloses a glaze conveying system, the purpose of which is to provide an automated glaze conveying line. This system utilizes two glaze conveying devices with a connecting intermediate pipe between their conveying pipes, allowing the pipes connecting to the two glaze cylinders to be interconnected. This eliminates the need to install branches on each conveying pipe corresponding to the number of glaze cylinders, enabling simultaneous glaze replacement from multiple cylinders. Consequently, the number of pipes used is reduced, and the layout of the conveying system is more rational.

[0004] However, because the glaze slurry raw material is at a high temperature immediately after production, if it is directly transported to the glazing line tank through pipelines, the high temperature of the glaze slurry will not only accelerate the chemical reaction of its own components, causing unstable changes in key performance parameters such as viscosity and fluidity, but may also cause thermal damage to the transport pipeline and subsequent glazing line equipment, affecting the service life and operational accuracy of the equipment. Furthermore, this glaze slurry transport system relies heavily on a single pump for continuous transport during the pumping process, lacking precise dynamic adjustment of the glaze slurry flow rate and pressure. When the glaze slurry viscosity changes due to temperature or composition fluctuations, problems such as unstable transport flow, pipeline blockage, or glaze slurry splashing can easily occur, affecting the continuity and stability of the glazing process.

[0005] Patent CN109968504B discloses an automatic slurry distribution device and method for the bottom of ceramic tile blanks. Its conveyor line, during slurry delivery, incorporates a cooling circulation system within the bottom slurry tank and intermediate bottom slurry tank. This system controls the temperature of the bottom slurry based on actual production conditions at different times, effectively addressing the issues of prolonged bottom slurry pump operation and slurry recycling. This avoids the problem of excessively high bottom slurry temperatures in summer, which severely damages the slurry's performance and leads to sedimentation and agglomeration. While this patent solves the problem of performance degradation and sedimentation caused by excessively high temperatures during bottom slurry delivery, its temperature control method and applicable scenarios have certain limitations. Specifically, it does not provide effective solutions for temperature changes during long-distance pipeline transport of ceramic glaze slurry, or for dynamically adjusting parameters such as delivery speed and flow rate based on real-time slurry temperature to ensure temperature stability upon arrival at the glaze line tank.

[0006] In addition, the cooling circulation system of the device uses circulating cooling water for cooling, and the cooling process is achieved by continuously circulating water. This continuous water circulation not only causes a large waste of water resources and increases the water cost of enterprises, but also, in winter and other low ambient temperatures, if the cooling water temperature is too low, it may cause the glaze slurry temperature to drop sharply, which will destroy the colloidal stability of the glaze slurry and cause premature coagulation or precipitation of particulate matter in the glaze slurry, further affecting the performance of the glaze slurry and the subsequent glazing effect. Summary of the Invention

[0007] In order to address the technical deficiencies mentioned in the background art, the present invention aims to provide an automatic ceramic glaze slurry pumping system and method. This system achieves stable supply and performance assurance during the glaze slurry transportation process by setting up a transfer glaze tank as a buffer unit and combining dual closed-loop control of liquid level and temperature.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An automatic pumping system for ceramic glaze slurry includes a supply glaze tank for storing glaze slurry raw materials, a transfer glaze tank for buffering and cooling, and a glaze bucket for glaze production line. A slurry supply pipe is connected between the glaze supply cylinder and the transfer glaze cylinder. The slurry supply pipe is connected to the outlet of the glaze supply cylinder and the inlet of the transfer glaze cylinder, and a pneumatic diaphragm pump is installed on the slurry supply pipe. The intermediate glaze tank is equipped with a liquid level sensor and a temperature sensor. The liquid level sensor is connected to the pneumatic diaphragm pump and is used to detect the glaze slurry level and control the start and stop frequency of the pneumatic diaphragm pump. The probe of the temperature sensor is inserted into the glaze slurry in the intermediate glaze tank to monitor the glaze slurry temperature in real time. A slurry delivery pipe is connected between the glaze bucket and the intermediate glaze tank. An internal circulation pump is installed on the slurry delivery pipe. The inlet of the internal circulation pump is connected to the slurry delivery pipe. A return pipe is connected between the outlet of the internal circulation pump and the inlet of the intermediate glaze tank. The return pipe is used to return part of the glaze slurry to the intermediate glaze tank. The intermediate glaze tank includes an inner liner and a hollow jacket covering the outer wall of the inner liner. The hollow jacket is provided with a cooling water inlet and a cooling water outlet. The cooling water inlet and the cooling water outlet are respectively connected to a cooling circulation system through water supply pipes to provide circulating cooling water to the intermediate glaze tank for cooling. The water supply pipes are provided with an intelligent temperature control valve group, which is connected to the temperature sensor signal to realize on-demand control of the cooling water flow in the water supply pipes.

[0009] Preferably, the intelligent temperature control valve assembly includes The valve body has a flow channel inside, and the two ends of the flow channel respectively form a valve group inlet connected to an external cooling water source and a valve group outlet connected to the cooling water inlet of the hollow jacket. The valve core is movably disposed within the flow channel of the valve body, and is used to open or close the flow channel; The electromagnetic drive unit includes an electromagnet fixed on the valve body and a moving iron core connected to the valve core. The moving iron core is movably disposed inside the electromagnet, and a push rod is connected between the moving iron core and the valve core. When the electromagnet is energized, it generates magnetic force to drive the moving iron core and the valve core to move to the open position. When the power is off, the magnetic force disappears. A reset spring is disposed between the electromagnetic drive unit and the valve core, and is used to provide an elastic force to reset the valve core to the closed position when the electromagnet is de-energized.

[0010] Preferably, the moving iron core has a hollow cavity inside, and a buffer spring is provided inside the hollow cavity. The two ends of the buffer spring abut against the inner wall of the moving iron core and the end of the push rod, respectively, to provide a buffering effect during the opening or closing of the valve core.

[0011] Preferably, the temperature control valve assembly further includes a lifting rod that passes through the electromagnetic drive unit. The lifting rod is used to manually push the top rod and the valve core to the open position when the electromagnet is de-energized and the valve core is in the closed position. The upper end of the lifting rod extends to the outside of the electromagnetic drive unit and is connected to a handle. The lower end of the lifting rod extends into the hollow cavity of the moving iron core and is provided with a connecting sleeve.

[0012] Preferably, the intermediate glaze tank is also provided with an umbrella-shaped diverter, and the surface of the umbrella-shaped diverter is circumferentially distributed with multiple diversion grooves.

[0013] Preferably, the inner wall of the hollow jacket is formed with a flow guiding structure for promoting cooling water turbulence, the flow guiding structure being a flow guiding plate that extends spirally from the cooling water inlet to the cooling water outlet.

[0014] Preferably, the cooling circulation system includes a cooling tower and a circulating water pump installed inside the cooling tower. The cooling tower is equipped with an axial fan at the top and a drainage pipe at the bottom. The inlet of the circulating water pump is connected to the water collection tank of the cooling tower, and the outlet of the circulating water pump is connected to the cooling water inlet of the intermediate glaze cylinder.

[0015] Preferably, a filter device is provided at the interface where the outlet of the internal circulation pump connects to the intermediate glaze tank. The filter device includes a filter cylinder and a filter screen. The filter cylinder is fixed to the glaze inlet of the intermediate glaze tank by a mounting bracket, and the filter cylinder has a trumpet-shaped structure. The filter screen is installed in the opening at the top of the filter cylinder to filter out agglomerated particles inside the glaze slurry.

[0016] Preferably, the glaze supply tank is provided with a stirring mechanism, which includes a rotating shaft and stirring paddles. The rotating shaft and the central axis of the stirring mechanism are located on the same axis, and one end of the rotating shaft is connected to a drive motor. The stirring paddles are equidistantly arranged on the outer surface of the rotating shaft, and adjacent stirring paddles are staggered.

[0017] A method for automatically pumping ceramic glaze slurry, characterized by comprising the following steps: S1. System initialization: Set the upper limit Lmax and lower limit Lmin of the glaze slurry level in the transfer glaze tank, as well as the glaze slurry temperature threshold T in the controller. S2. Liquid level control: The liquid level sensor monitors the liquid level L of the glaze slurry in the transfer glaze tank in real time. When L ≤ the lower limit Lmin, the controller starts the pneumatic diaphragm pump to pump the glaze slurry from the supply glaze tank to the transfer glaze tank. When L ≥ the upper limit Lmax, the controller stops the pneumatic diaphragm pump. S3. Temperature Control: The temperature sensor monitors the temperature Tactual of the glaze slurry in the transfer glaze tank in real time; when Tactual > Tset, the controller controls the cooling circulation system to start and introduces cooling water into the hollow jacket for cooling; when Tactual ≤ (Tset - ΔT), the controller controls the intelligent temperature control valve group to close and stop cooling. S4. Glaze slurry output: The glaze slurry in the transfer glaze tank is continuously pumped out through the slurry delivery pipeline to multiple glaze buckets for use in the production glaze line. S5. Glaze slurry internal circulation: Under the action of the internal circulation pump, part of the glaze slurry is returned to the transfer glaze tank for reuse through the return pipe to prevent the glaze slurry from clogging the slurry delivery pipe.

[0018] In summary, the beneficial effects of the present invention are as follows: 1. This invention, by setting up an intermediate glaze tank as a buffer unit for glaze slurry delivery and combining it with the linkage control of a liquid level sensor and a pneumatic diaphragm pump, achieves precise adjustment of the glaze slurry level, avoiding the problem of flow fluctuation caused by the long distance between the supply glaze tank and the glaze line. At the same time, by using a temperature sensor in conjunction with an intelligent temperature control valve group and a cooling circulation system, the flow of cooling water can be dynamically adjusted according to the real-time temperature of the glaze slurry. This not only solves the problem of the impact of high-temperature glaze slurry on performance, but also reduces water waste by controlling the temperature on demand. Thus, it realizes fully automated pumping and temperature management from the glaze tank to the glaze line, completely eliminating the problems of high intensity, error-proneness, and contamination caused by manual operation, and reducing the cost of manual intervention.

[0019] 2. This invention establishes an internal circulation pump on the slurry delivery pipe between the intermediate glaze tank and the glaze bucket. This pump returns a portion of the glaze slurry to the intermediate glaze tank via a return pipe, creating a continuous self-circulating flow of the glaze slurry. This circulation method not only breaks down the agglomeration structure between particles in the glaze slurry through flow shear force, preventing solid particles from settling and accumulating due to gravity, but also ensures a more uniform temperature and concentration distribution of the glaze slurry in different areas of the intermediate glaze tank. This avoids the adverse effects of excessively high local temperatures or component segregation on subsequent glazing processes. Simultaneously, the continuous operation of the internal circulation pump ensures that the delivery pipe is always filled with flowing glaze slurry, reducing scaling and blockage caused by glaze slurry stagnation in the pipe, and improving the stability and reliability of glaze slurry supply during the production of architectural ceramics.

[0020] 3. This invention modularly integrates functions such as pumping, transfer, temperature control, and circulation. Through the coordinated work of various components, the entire system achieves integrated intelligent control of glaze slurry pumping, transfer, temperature control, and circulation, effectively solving problems such as resource waste, insufficient temperature control accuracy, and unstable glaze slurry performance in traditional conveying systems, thereby further improving the level of intelligence and production efficiency of ceramic glaze slurry conveying. Attached Figure Description

[0021] Figure 1 This is a production layout diagram of the automatic ceramic glaze slurry pumping system of the present invention; Figure 2 This is a schematic diagram of the structure of the glaze vat supplied in this invention; Figure 3 This is a cross-sectional view of the glaze vat supplied in this invention; Figure 4 This is a schematic diagram of the structure of the intermediate glaze vat in this invention; Figure 5 This is a top view of the intermediate glaze vat in this invention; Figure 6 yes Figure 5 A cross-sectional view of the AA plane; Figure 7 This is a three-dimensional sectional view of the intelligent temperature control valve assembly in this invention; Figure 8 This is a schematic diagram of the cooling circulation system in this invention; Figure 9 This is a schematic diagram of the internal circulation of glaze slurry in this invention; where the arrows indicate the direction of glaze slurry transport. Figure 10 This is a flowchart illustrating the automatic pumping process of ceramic glaze slurry in this invention.

[0022] Explanation of the reference numerals in the figure: 1. Glaze vat supply; 11. Slurry supply pipeline; 12. Pneumatic diaphragm pump; 2. Transfer glaze tank; 21. Inner liner; 22. Hollow jacket; 221. Cooling water inlet; 222. Cooling water outlet; 223. Guide vane; 23. Umbrella-shaped distributor; 231. Drainage channel; 3. Glazing bucket; 31. Slurry delivery pipe; 32. Internal circulation pump; 33. Return pipe; 4. Liquid level sensor; 5. Temperature sensor; 6. Cooling circulation system; 61. Cooling tower; 62. Circulating water pump; 63. Axial flow fan; 64. Drainage pipeline; 7. Intelligent temperature control valve assembly; 71. Valve body; 711. Valve assembly inlet; 712. Valve assembly outlet; 72. Valve core; 73. Electromagnetic drive unit; 731. Electromagnet; 732. Moving iron core; 733. Push rod; 734. Buffer spring; 74. Return spring; 75. Lifting rod; 751. Connecting sleeve; 76. Handle; 77. Locking device; 78. Sealing ring; 8. Filtration device; 81. Filter cartridge; 82. Filter screen; 9. Stirring device; 91. Rotating shaft; 92. Stirring paddle; 93. Drive motor; 10. Controller. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0024] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, the above terms should not be construed as limiting this invention.

[0025] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0026] The following is in conjunction with the appendix Figure 1-10 The embodiments of the automatic pumping system and method for ceramic glaze slurry of the present invention will be described in further detail below.

[0027] An automatic pumping system for ceramic glaze slurry, such as Figure 1 As shown, it includes a supply glaze cylinder 1 for storing glaze slurry raw materials, a transfer glaze cylinder 2 for buffering and cooling, and a glaze bucket 3 for glaze production line production; a slurry supply pipe 11 is connected between the supply glaze cylinder 1 and the transfer glaze cylinder 2, and the slurry supply pipe 11 is connected to the outlet of the supply glaze cylinder 1 and the inlet of the transfer glaze cylinder 2 respectively, and a pneumatic diaphragm pump 12 is installed on the slurry supply pipe 11.

[0028] Specifically, the glaze supply tank 1 adopts a double-layer insulation structure design, with an outer stainless steel protective shell and an inner corrosion-resistant ceramic lining, effectively reducing the impact of external ambient temperature on the glaze slurry raw materials. Its bottom has a funnel-shaped structure, and a Y-type filter can be installed at the outlet to pre-filter large particles of impurities in the glaze slurry, preventing them from entering the subsequent pipeline system and causing blockages. The pneumatic diaphragm pump features adjustable flow rate and strong self-priming capability. Its inlet is connected to the outlet of the glaze supply tank 1 via a flange, and its outlet is connected to the slurry supply pipeline 11 via a quick-release clamp, facilitating disassembly and maintenance. The pump body is equipped with a pressure gauge and a flow regulating valve, which can monitor and adjust the pump output flow rate in real time to ensure a stable slurry supply to the intermediate glaze tank 2.

[0029] In this embodiment, as Figure 1As shown, the automatic ceramic glaze slurry pumping system also includes a controller 10, which is connected to the level sensor 4 and the temperature sensor 5. The controller 10 uses a PLC as the main control unit and is equipped with a 7-inch color touchscreen as the human-machine interface. It can display various system parameters in real time, such as the level and temperature of the intermediate glaze tank 2, pump operating status, and valve opening / closing degree. It also supports parameter setting, historical data query, and alarm recording functions. The controller 10 also has remote monitoring capabilities, uploading data to the factory's MES system via an Ethernet module. Management personnel can view the system's operating status at the monitoring center, enabling remote diagnosis and maintenance.

[0030] In this embodiment, as Figure 2 , 3 As shown, a stirring mechanism is provided inside the glaze supply tank 1. The stirring mechanism includes a rotating shaft 91 and a stirring paddle 92. The rotating shaft 91 and the central axis of the stirring mechanism are located on the same axis. One end of the rotating shaft 91 is connected to a drive motor 93. The drive motor 93 is fixed on the glaze supply tank 1 by a bracket. The stirring paddles 92 are equidistantly arranged on the outer surface of the rotating shaft 91, and adjacent stirring paddles 92 are staggered.

[0031] Specifically, the drive motor 93 is a variable frequency speed control motor, and its output shaft is rigidly connected to the rotating shaft 91 through a coupling. The speed of the drive motor 3 can be adjusted by the controller 10, ensuring the stirring effect while avoiding the introduction of too much air during high-speed stirring. For those skilled in the art, the stirring paddle 92 can adopt a multi-layer staggered distribution structure or a spiral winding structure, and the specific structure can be adjusted according to actual needs. At the same time, the stirring paddle 92 can form a composite stirring flow field in the axial and radial directions when rotating, which not only enhances the agitation effect on the sedimented particles at the bottom of the glaze slurry, but also promotes the overall circulation of the glaze slurry at the top, effectively preventing the glaze slurry from stratifying or agglomerating in the glaze supply tank 1.

[0032] In addition, the seal between the rotating shaft 91 and the top of the glaze supply tank 1 adopts a dual sealing structure of mechanical seal and skeleton oil seal. The mechanical seal surface is made of silicon carbide, which has wear-resistant and high-temperature resistant properties, ensuring that there is no glaze slurry leakage during long-term stirring.

[0033] In this embodiment, as Figure 1 and Figure 9 As shown, a slurry delivery pipe 31 is connected between the glaze bucket 3 and the intermediate glaze tank 2. An internal circulation pump 32 is installed on the slurry delivery pipe 31. The inlet of the internal circulation pump 32 is connected to the slurry delivery pipe 31. A return pipe 33 is connected between the outlet of the internal circulation pump 32 and the inlet of the intermediate glaze tank 2. The return pipe 33 is used to return part of the glaze slurry to the intermediate glaze tank 2 to form a self-circulation of the glaze slurry.

[0034] Specifically, the internal circulation pump 32 is a stainless steel magnetically driven pump. Its inlet end is connected to the main pipeline of the slurry delivery pipe 31, and its outlet end is divided into two paths. One path is connected to each glaze tank 3 through a slurry delivery branch pipe, and the other path is connected to the top glaze inlet of the intermediate glaze tank 2 through a return pipe 33. The flow rate parameters of the internal circulation pump 32 are set according to the production needs of the glaze line. The output flow to the glaze tank 3 accounts for 60%-70% of the total flow, and the remaining 30%-40% of the flow is returned to the intermediate glaze tank 2 through the return pipe 33.

[0035] It is worth noting that an adjustable flow ball valve is installed at the end of the return pipe 33. Operators can manually fine-tune the return ratio according to the viscosity changes of the glaze slurry in actual production to ensure that the flow rate of the glaze slurry in the slurry delivery pipe 31 is always maintained in the optimal range of 0.8-1.2m / s. This can effectively prevent particle sedimentation and avoid aggravated pipe wear due to excessive flow rate.

[0036] In this embodiment, as Figure 1 and Figure 8 As shown, the automatic ceramic glaze slurry pumping system also includes a cooling circulation system 6. A water supply pipe is connected between the cooling circulation system 6 and the intermediate glaze tank 2. An intelligent temperature control valve group 7 is installed on the water supply pipe. The intelligent temperature control valve group 7 is connected to the temperature sensor 5 to realize on-demand control of the cooling water flow in the water supply pipe.

[0037] Specifically, the cooling circulation system 6 includes a cooling tower 61 and a circulating water pump 62 (not shown in the figure) installed inside the cooling tower 61. The cooling tower 61 is equipped with an axial fan 63 at the top and a drainage pipe 64 at the bottom. The inlet of the circulating water pump 62 is connected to the water collection tank of the cooling tower 61, and the outlet of the circulating water pump 62 is connected to the cooling water inlet 221 of the intermediate glaze tank 2. To improve cooling efficiency, the packing layer inside the cooling tower 61 adopts a diagonally corrugated structure, which increases the contact area between the cooling water and the air. The circulating water pump 62 (not shown in the figure) is a stainless steel centrifugal pump. Its impeller is optimized by fluid dynamics to reduce operating noise while meeting flow requirements. A pressure sensor is installed at the pump outlet to monitor the pressure of the circulating water system in real time. When the pressure is lower than the set threshold, the controller 10 triggers an alarm and automatically switches to the standby pump.

[0038] In this embodiment, as Figure 4-6 As shown, the transfer glaze tank 2 includes an inner liner 21 and a hollow jacket 22 covering the outer wall of the inner liner 21. The hollow jacket 22 is provided with a cooling water inlet 221 and a cooling water outlet 222. The cooling water inlet 221 and the cooling water outlet 222 are respectively connected to the cooling circulation system 6 through water supply pipes.

[0039] Specifically, the inner liner 21 of the transfer glaze tank 2 is made of 316L stainless steel, and its inner wall is electrolytically polished to effectively reduce glaze residue and scaling. The cooling water inlet 221 is located at the bottom of the hollow jacket 22, and the cooling water outlet 222 is located at the top. This bottom-in, top-out design allows the cooling water to fill the entire jacket space, avoiding dead zones in local heat exchange and ensuring uniform cooling of the outer wall of the inner liner 21.

[0040] To further improve cooling efficiency, such as Figure 6 As shown, a flow-guiding structure for promoting cooling water turbulence is formed on the inner wall of the hollow jacket 22. The flow-guiding structure is a guide vane 223 that extends spirally from the cooling water inlet to the cooling water outlet. The flow-guiding structure guides the cooling water along a spiral path to form a swirling flow and continuously disrupts the water boundary layer, increasing the degree of turbulence.

[0041] It should be noted that the flow guiding structure can adopt either the flow guiding plate 223 or the flow guiding column structure. The spiral angle of the flow guiding plate 223 is 30°-60°; the spacing of the flow guiding columns is 1 / 5 to 1 / 10 of the inner diameter of the jacket. Both of these structures can significantly enhance heat transfer, and the appropriate solution can be selected for the two flow guiding structures according to the actual glaze slurry cooling requirements.

[0042] In this embodiment, as Figure 6 As shown, an umbrella-shaped diverter 23 is installed at the inlet of the transfer glaze tank 2. The umbrella-shaped diverter 23 is fixed on the glaze inlet at the top of the inner liner 21, and multiple diversion grooves 231 are distributed around the surface of the umbrella-shaped diverter 23.

[0043] Specifically, the umbrella-shaped distributor 23 is made of polytetrafluoroethylene material, with eight 5mm wide drainage grooves 231 evenly distributed around its surface. The glaze slurry can flow downwards in a spiral shape along the inner wall of the transfer glaze tank 2 through the drainage grooves 231, avoiding the glaze slurry from directly impacting the liquid surface and generating a large number of bubbles. At the same time, it prolongs the residence time of the glaze slurry in the transfer glaze tank 2 and improves the temperature regulation effect.

[0044] In this embodiment, as Figure 4 , 5 As shown, the intermediate glaze tank 2 is equipped with a liquid level sensor 4 and a temperature sensor 5. The liquid level sensor 4 is connected to the pneumatic diaphragm pump 12 for detecting the glaze slurry level and controlling the start and stop frequency of the pneumatic diaphragm pump 12. The probe of the temperature sensor 5 extends into the glaze slurry in the intermediate glaze tank 2 for real-time monitoring of the glaze slurry temperature.

[0045] Specifically, the level sensor 4 is an immersion-type hydrostatic level gauge. Its probe tip is wrapped with a PTFE protective film and is installed at the reserved interface on the top of the transfer glaze tank 2 via a flange. When the glaze level is detected to be lower than the set lower limit Lmin, it immediately sends a signal to the controller 10. The controller 10 then starts the pneumatic diaphragm pump 12 to draw glaze from the supply glaze tank 1 and pump it into the transfer glaze tank 2 until the level reaches the upper limit Lmax, at which point the pneumatic diaphragm pump 12 stops. This achieves dynamic adjustment of the glaze storage in the transfer glaze tank 2, ensuring the continuity of glaze supply. The temperature sensor 5's probe extends into the glaze inside the inner tank 21, enabling it to capture real-time changes in glaze temperature. Its monitoring data is directly fed back to the controller 10, providing a basis for the operation of the intelligent temperature control valve group 7.

[0046] In this embodiment, as Figure 1 and Figure 4 As shown, a filter device 8 is installed at the interface between the outlet of the internal circulation pump 31 and the intermediate glaze tank 2. The filter device 8 includes a filter cylinder 81 and a filter screen 82 installed on the opening of the filter cylinder 81. The filter cylinder 81 is fixed to the glaze inlet of the intermediate glaze tank 2 by a mounting bracket, and the filter cylinder 81 has a trumpet-shaped structure, with its upper opening larger than its lower opening, to prevent glaze slurry from splashing out of the intermediate glaze tank 2. The filter screen 82 is made of 200-mesh stainless steel sintered mesh, which is installed in the upper opening of the filter cylinder 81 to filter out agglomerated particles inside the glaze slurry.

[0047] In this embodiment, as Figure 7 As shown, the intelligent temperature control valve assembly 7 includes a valve body 71, a valve core 72, an electromagnetic drive unit 73, and a return spring 74. A flow channel is formed inside the valve body 71, with the two ends of the flow channel forming a valve assembly inlet 711 connected to an external cooling water source and a valve assembly outlet 712 connected to the cooling water inlet 221 of the hollow jacket 22, respectively. The valve core 72 is movably disposed within the flow channel of the valve body 71 for opening or closing the flow channel. The electromagnetic drive unit 73 includes an electromagnet 731 fixed to the valve body 71 and a moving iron core 732 connected to the valve core 72. The electromagnet 731 is electrically connected to the controller 10. When the electromagnet 731 is energized, it generates magnetic force to drive the moving iron core 732, along with the valve core 72, to move to the open position. When the power is off, the magnetic force disappears. The return spring 74 is disposed between the electromagnet 731 and the valve core 72, providing an elastic force to reset the valve core 72 to the closed position when the electromagnet 731 is de-energized.

[0048] Specifically, the intelligent temperature control valve assembly 7, as the core control component of the cooling circulation system 6, forms a closed-loop linkage with the temperature sensor 5 and the controller 10. The valve body 71 is made of forged brass, and the internal flow channel is precision machined to ensure low water flow resistance and no eddy current generation. Standard threaded interfaces are provided at both the valve assembly inlet 711 and the valve assembly outlet 712 for easy and quick connection to the water supply pipeline. The valve core 72 and the flow channel of the valve body 71 are dynamically sealed by a polytetrafluoroethylene sealing ring 78, which has a low coefficient of friction and is resistant to chemical corrosion by glaze, effectively avoiding the problem of easy aging and leakage of traditional rubber seals after long-term use. The electromagnet 731 of the electromagnetic drive unit 73 is powered by a safe DC 24V voltage. The moving iron core 732 is rigidly connected to the valve core 72 through a push rod 733, the surface of which is hard anodized to improve wear resistance. The return spring 74 is made of high-temperature resistant chromium vanadium steel, and its elastic coefficient has been pre-compressed and adjusted to ensure that it can quickly drive the valve core 72 to return to the sealed state after the electromagnet 731 is de-energized.

[0049] The process of the intelligent temperature control valve group 7 automatically switching on and off the cooling water is as follows: When the temperature sensor 5 detects that the glaze temperature Tactual exceeds the set threshold Tset, the controller 10 sends a command to energize the electromagnet 731 in the electromagnetic drive unit 73. The generated magnetic force drives the moving iron core 732 and the valve core 72 to move, opening the internal flow channel of the valve body 71. Cooling water enters the hollow jacket 22 through the valve group inlet 711, the flow channel, and the valve group outlet 712. The glaze is cooled by heat exchange with the outer wall of the inner tank 21. When the glaze temperature drops below Tset-ΔT, the electromagnet 731 is de-energized, and the elastic force of the return spring 74 pushes the valve core 72 to reset, cutting off the flow channel and stopping the supply of cooling water to avoid excessive cooling from adversely affecting the performance of the glaze.

[0050] In this embodiment, as Figure 7 As shown, the moving iron core 732 has a hollow cavity inside, and a buffer spring 734 is installed inside the hollow cavity. The two ends of the buffer spring 734 abut against the inner wall of the moving iron core 732 and the end of the push rod 733, respectively, to provide a buffering effect during the opening or closing of the valve core 72.

[0051] Specifically, the free length of the buffer spring 734 is matched with the depth of the hollow cavity of the moving iron core 732. When the electromagnet 731 is energized and drives the moving iron core 732 to move the valve core 72 quickly, the buffer spring 734 absorbs the impact force between the valve core 72 and the flow channel port of the valve body 71 through its own compression deformation, avoiding component wear caused by rigid collision. During the process of de-energizing the electromagnet 731 and resetting the valve core 72, the buffer spring 734 can slow down the closing speed of the valve core 72, preventing the valve core 72 from making violent contact with the sealing surface due to the excessive instantaneous elastic force of the reset spring 74, effectively extending the service life of the seal.

[0052] In this embodiment, as Figure 7 As shown, the intelligent temperature control valve group 7 also includes a lifting rod 75 that runs through the electromagnetic drive unit 73. The lifting rod 75 is used to manually push the top rod 733 and the valve core 72 to the open position when the electromagnet 731 is de-energized and the valve core 72 is in the closed position. The upper end of the lifting rod 75 extends to the outside of the electromagnetic drive unit 73 and is connected to a handle 76. The lower end of the lifting rod 75 extends into the hollow cavity of the moving iron core 732 and is provided with a connecting sleeve 751.

[0053] Specifically, the top of the lifting rod 75 extends beyond the electromagnet 731, facilitating manual operation in case of malfunction of the intelligent temperature control valve assembly 7, enabling forced opening or closing and improving the system's emergency response capability. The connecting sleeve 751 is fixed to the end of the lifting rod 75 using a threaded connection, ensuring that the thrust of the lifting rod 75 can be stably transmitted to the valve core 72.

[0054] The process of manually switching on and off the cooling water in the intelligent temperature control valve group 7 is as follows: When the electromagnetic drive unit 73 fails or the sensor malfunctions, preventing automatic cooling, and the temperature sensor 5 detects that the glaze temperature exceeds the set temperature for 30 seconds, the controller 10 triggers a high-temperature alarm. At this time, the operator can manually open the intelligent temperature control valve group 7 by pulling the handle 76 upwards and driving the lifting rod 75 upwards. Since the end of the lifting rod 75 connected to the moving iron core 732 is designed with a connecting sleeve 751, the lifting process will mechanically force the moving iron core 732 and the valve core 72 to move upwards together, thereby compressing the return spring 74 and forcibly opening the valve core 72. This ensures that the cooling circulation system 6 can still maintain basic operation during maintenance, avoiding the impact on production continuity due to the uncontrolled glaze temperature.

[0055] It is worth noting that, to avoid interference between the lifting rod 75 and the electromagnetic drive unit 73, a locking device 77 is provided on the lifting rod 75 in this embodiment. The locking device 77 is a pin located below the handle 76. In automatic mode, the locking device 77 locks the lifting rod 75 in the upper position, disengaging its lower end from the moving iron core 732 to prevent interference with automatic operation. In manual mode, by releasing the locking device 77 and manually pulling the handle 76, the lifting rod 75 moves the valve core 72 to the fully open position. Simultaneously, the locking device 77 is re-secured to the lifting rod 75, keeping the valve core 72 in the open position, thus allowing the cooling circulation system 6 to enter continuous operation.

[0056] In addition, the automatic pumping system is equipped with multiple safety protection functions, such as low liquid level alarm for glaze tank 1, over-temperature alarm for transfer glaze tank 2, overload protection for pneumatic diaphragm pump 12, and water cut-off protection for cooling circulation system 6. When any protection condition is triggered, the controller 10 immediately takes corresponding interlocking actions, such as stopping the pump operation, closing the valve, etc., and sends an alarm signal to notify the operator to handle the situation.

[0057] A method for automatic pumping of ceramic glaze slurry, such as Figure 10 As shown, it includes the following steps: S1. System initialization: Set the upper limit Lmax and lower limit Lmin of the glaze slurry level of the transfer glaze tank 2 in the controller 10, as well as the glaze slurry temperature threshold T. S2. Liquid level control: Liquid level sensor 4 monitors the glaze slurry level L in the transfer glaze tank 2 in real time. When L ≤ lower limit Lmin, controller 10 starts pneumatic diaphragm pump 12 to pump glaze slurry from supply glaze tank 1 to transfer glaze tank 2. When L ≥ upper limit Lmax, controller 10 stops pneumatic diaphragm pump 12. S3. Temperature control: Temperature sensor 5 monitors the temperature Tactual of the glaze slurry in the transfer glaze tank 2 in real time; when Tactual>Tset, controller 10 controls the cooling circulation system 6 to start and introduces cooling water into the hollow jacket 22 for cooling; when Tactual≤(Tset-ΔT), controller 10 controls the intelligent temperature control valve group 7 to close and stop cooling. S4. Glaze slurry output: The glaze slurry in the intermediate glaze tank 2 is continuously pumped out through the slurry delivery pipe 31 to multiple glaze buckets 3 for use in the production glaze line. S5. Glaze slurry internal circulation: Under the action of the internal circulation pump 32, part of the glaze slurry is returned to the transfer glaze tank 2 for internal circulation through the return pipe 33 to prevent the glaze slurry from clogging the slurry delivery pipe 31.

[0058] Specifically, during actual operation, the system initialization phase requires setting the upper and lower limits of the liquid level in the intermediate glaze tank 2, the temperature threshold T, and the temperature hysteresis ΔT in the controller 10. During liquid level control, when the liquid level sensor 4 detects that the liquid level in the intermediate glaze tank 23 is below Lmin, the controller 10 outputs a signal to open the inlet solenoid valve of the pneumatic diaphragm pump 12. Compressed air drives the diaphragm pump to pump the glaze slurry supplied from the glaze tank 11 into the intermediate glaze tank 2. When the liquid level reaches Lmax, the controller 10 closes the inlet solenoid valve, and the diaphragm pump stops working. Temperature control uses a PID adjustment algorithm. When the temperature sensor 5 detects that the glaze slurry temperature Tactual exceeds Tset, the controller 1061 adjusts the opening of the intelligent temperature control valve group 7 according to the temperature difference, achieving stepless adjustment of the cooling water flow rate and avoiding temperature fluctuations caused by traditional on / off control. When Tactual drops below Tset - ΔT, the intelligent temperature control valve group 7 is closed, and cooling stops. The internal circulation pump 32 runs continuously, maintaining a constant outlet pressure through frequency conversion regulation to ensure a stable supply of slurry to the glaze tank 3. At the same time, the flow rate of the return branch is set to 30% of the total flow rate through a manual regulating valve to ensure continuous circulation of glaze slurry in the intermediate glaze tank 2 and prevent particle settling.

[0059] ΔT is the temperature hysteresis threshold, ranging from 1 to 3℃, used to prevent the intelligent temperature control valve group 74 from frequently opening and closing at the temperature critical point. In step S4, a flow sensor and a pressure sensor are installed on the outlet pipe of the internal circulation pump 327 to monitor the flow rate Q and pressure P of the output glaze slurry in real time and feed the data back to the controller 10. When Q or P exceeds the preset range, the controller 10 dynamically adjusts the output parameters by adjusting the speed of the variable frequency motor of the internal circulation pump 32 to ensure that the flow rate of the glaze slurry supplied to the intermediate glaze tank 2 is stable within the set range and the pressure is maintained within the process requirement range of 0.3-0.5MPa. At the same time, an adjustable throttle valve is installed on the return pipe. The operator can remotely adjust the opening of the throttle valve according to the actual viscosity characteristics of the glaze slurry through the controller 10 to change the proportion of the returned glaze slurry, thereby optimizing the stirring effect of the internal circulation and preventing the glaze slurry from depositing and stratifying at the bottom of the intermediate glaze tank 2.

[0060] The glaze slurry delivery process of the present invention is as follows: During the actual glaze slurry delivery process, the glaze slurry raw material in the glaze supply tank 1 is continuously pumped into the inner liner 21 of the transfer glaze tank 2 through the pipeline via the pneumatic diaphragm pump 12. The liquid level sensor 4 monitors the glaze slurry level in the inner liner 21 in real time. When the liquid level is lower than the set lower limit Lmin, the controller 10 of the dynamic monitoring system immediately issues a command to start the pneumatic diaphragm pump 12 to accelerate the glaze slurry delivery speed; and when the liquid level reaches the upper limit Lmax, the controller 10 controls the pneumatic diaphragm pump 12 to stop running, thereby achieving precise control of the amount of glaze slurry in the transfer glaze tank 2 and ensuring the continuity and stability of the glaze slurry supply.

[0061] Meanwhile, the probe of temperature sensor 5 is always immersed in the glaze slurry, dynamically capturing the real-time temperature T of the glaze slurry. Once T exceeds the preset temperature threshold T, controller 10 quickly sends an opening signal to intelligent temperature control valve group 7. Electromagnet 731 of electromagnetic drive unit 73 is energized to generate magnetic force, driving moving iron core 732 to move valve core 72 to the open position. This allows external cooling water to enter the cooling water inlet 221 of hollow jacket 22 through valve group inlet 711, flow channel, and valve group outlet 712. After the cooling water exchanges heat with the glaze slurry in inner tank 21 within the jacket, it flows back to cooling circulation system 6 from cooling water outlet 222, effectively reducing the glaze slurry temperature. When temperature sensor 5 reports that the real-time temperature has dropped below the preset temperature, controller 10 de-energizes electromagnet 731, the magnetic force disappears, and the elastic force of return spring 74 pushes valve core 72 back to the closed position, cutting off the cooling water supply and preventing excessive cooling from adversely affecting the performance of the glaze slurry.

[0062] In addition, the glaze outlet at the bottom of the intermediate glaze tank 2 is connected to the internal circulation pump 32 through the slurry delivery pipe 31. The internal circulation pump 32 operates continuously, delivering part of the glaze slurry to the glaze bucket 3 used in the glaze line to meet production needs, while the other part returns to the upper part of the intermediate glaze tank 2 through the return pipe 33, forming a continuous internal circulation flow field. The flow characteristics of the glaze slurry are used to prevent particulate matter from settling and agglomerating, further ensuring the uniformity and stability of the glaze slurry.

[0063] During the operation of the entire automatic pumping system, if the automatic control function of the intelligent temperature control valve group 7 malfunctions and causes the glaze slurry temperature to rise abnormally, the operator can release the locking device 77 on the lifting rod 75, manually press down the handle 76, and forcefully push the valve core 72 to open the flow channel, so that the cooling circulation system 6 enters the emergency cooling mode, ensuring that the glaze slurry temperature is controlled in time and avoiding the occurrence of production accidents.

[0064] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A kind of ceramic glaze automatic pumping system, including supply glaze jar for storing glaze raw material, transfer glaze jar for buffering cooling, and glaze bucket for glaze line production;Characterized in that, Slurry pipe is connected between the supply glaze jar and the transfer glaze jar, the slurry pipe is communicated with the outlet of the supply glaze jar and the inlet of transfer glaze jar respectively, and the slurry pipe is provided with pneumatic diaphragm pump; The transfer glaze jar is provided with liquid level sensor and temperature sensor, the liquid level sensor is signal connected with the pneumatic diaphragm pump, for detecting glaze liquid level and controlling the start-stop frequency of the pneumatic diaphragm pump;The probe of the temperature sensor is inserted into the glaze of the transfer glaze jar, for real-time monitoring glaze temperature; Glaze pipe is connected between the glaze bucket and the transfer glaze jar, the glaze pipe is provided with internal circulation pump, the inlet of the internal circulation pump is communicated with the glaze pipe, and the outlet of the internal circulation pump is connected with the inlet of the transfer glaze jar through backflow pipe, and the backflow pipe is used to flow part of the glaze back into the transfer glaze jar; The transfer glaze jar includes inner container and hollow jacket covered on the outer wall of the inner container, and the hollow jacket is provided with cooling water inlet and cooling water outlet;The cooling water inlet and cooling water outlet are respectively connected with cooling circulation system through water pipe for providing circulating cooling water for the transfer glaze jar to cool down;The water pipe is provided with intelligent temperature control valve group, and the intelligent temperature control valve group is signal connected with the temperature sensor to realize on-demand control of the cooling water on-off of the water pipe.

2. The automatic ceramic slip pumping system of claim 1, wherein, The intelligent temperature control valve group includes Valve body, internally formed with flow channel, the flow channel is respectively formed with valve group water inlet connected with external cooling water source and valve group water outlet connected with the cooling water inlet of the hollow jacket at both ends; Valve core, movably arranged in the flow channel of the valve body, for conducting or cutting off the flow channel; Electromagnetic drive unit, including electromagnet fixed on the valve body and moving iron core connected with the valve core, the moving iron core is movably arranged in the electromagnet, and the moving iron core and the valve core are connected with top rod;The electromagnet generates magnetic force when electrified to drive the moving iron core and the valve core to move to the open position, and the magnetic force disappears when de-energized; Reset spring, arranged between the electromagnetic drive unit and the valve core, for providing elastic force to reset the valve core to the closed position when the electromagnet is de-energized.

3. The automatic ceramic slip pumping system of claim 2, wherein, The moving iron core has a hollow cavity, and a buffer spring is arranged in the hollow cavity, and the two ends of the buffer spring are respectively in contact with the inner wall of the moving iron core and the end of the top rod, for providing buffering effect during opening or closing of the valve core.

4. The automatic ceramic slip pumping system of claim 2, wherein, The temperature control valve group further includes pull rod penetrating the electromagnetic drive unit, the pull rod is used to manually control the pull rod to push the top rod and the valve core to move to the open position when the electromagnet is de-energized and the valve core is in the closed position;The upper end of the pull rod extends to the outside of the electromagnetic drive unit and is connected with a handle;The lower end of the pull rod extends into the hollow cavity of the moving iron core and is provided with a connecting sleeve.

5. The automatic ceramic slip pumping system of claim 1, wherein, An umbrella-shaped flow divider is further arranged in the transfer glaze jar, and a plurality of drainage grooves are circumferentially distributed on the surface of the umbrella-shaped flow divider.

6. The automatic ceramic slip pumping system of claim 1, wherein, The inner wall of the hollow jacket is formed with a guide structure for promoting turbulent flow of the cooling water, the guide structure being a guide vane extending spirally from the cooling water inlet to the cooling water outlet.

7. The automatic ceramic slip pumping system of claim 1, wherein, The cooling circulation system comprises a cooling tower and a circulating water pump arranged in the cooling tower, the cooling tower being provided with an axial flow fan at the top and a drain pipeline at the bottom; the inlet of the circulating water pump is connected with a water collecting tank of the cooling tower, and the outlet of the circulating water pump is connected in communication with the cooling water inlet of the transfer glaze cylinder.

8. The automatic ceramic slip pumping system of claim 1, wherein, A filter device is arranged at the interface of the transfer glaze cylinder to which the outlet of the inner circulating pump is connected, the filter device comprising a filter cartridge and a filter screen, the filter cartridge being fixed at the glaze inlet of the transfer glaze cylinder by a mounting frame and having a horn structure, and the filter screen being installed in the opening at the upper part of the filter cartridge to filter the agglomerated particles in the glaze slurry.

9. The automatic ceramic slip pumping system of claim 1, wherein, The supply glaze cylinder is provided with a stirring mechanism, the stirring mechanism comprising a rotating shaft and stirring paddles, the rotating shaft and the central axis of the stirring mechanism being on the same axis, and one end of the rotating shaft being drivingly connected with a driving motor; the stirring paddles are equidistantly arranged on the outer surface of the rotating shaft, and adjacent stirring paddles are distributed in a staggered manner.

10. A method for automatic pumping of ceramic slip using the system of any one of claims 1-9, characterized by, The method comprises the following steps: S1, system initialization, setting the upper limit Lmax and lower limit Lmin of the glaze slurry liquid level in the transfer glaze cylinder and the glaze slurry temperature threshold Tset in the controller; S2, liquid level control: the liquid level sensor monitors the glaze slurry liquid level L in the transfer glaze cylinder in real time, when L≤Lmin, the controller starts the pneumatic diaphragm pump to pump the glaze slurry from the supply glaze cylinder to the transfer glaze cylinder; when L≥Lmax, the controller stops the pneumatic diaphragm pump; S3, temperature control: the temperature sensor monitors the glaze slurry temperature Treal in the transfer glaze cylinder in real time, when Treal>Tset, the controller controls the cooling circulation system to be started and the cooling water to be supplied to the hollow jacket for cooling; when Treal≤(Tset-ΔT), the controller controls the intelligent temperature control valve group to be closed and the cooling to be stopped; S4, glaze slurry output: the glaze slurry in the transfer glaze cylinder is continuously pumped out through the glaze slurry pipeline to the plurality of glaze buckets for use in the production glaze line; S5, glaze slurry internal circulation: part of the glaze slurry is returned to the transfer glaze cylinder through the return pipeline under the action of the inner circulating pump for internal circulation, so as to prevent the glaze slurry from blocking the glaze slurry pipeline.

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