Intelligent double-cylinder magnetic sieve integrated filtering device for emulsion and filtering method thereof

Abstract

The invention discloses an emulsion intelligent double-cylinder magnetic screen integrated filtering device and a filtering method thereof.The emulsion intelligent double-cylinder magnetic screen integrated filtering device comprises a double-cylinder filter assembly, a communicating pipe assembly, a screen cloth assembly and an automatic control assembly, the double-cylinder filter assembly comprises two single-cylinder filters of the same structure, and an alternate operation mode is adopted to form a one-in-one-standby structure; the communicating pipe assembly integrates a sewage discharge main pipe, a branch sewage discharge pipe and a liquid filling bypass pipe to achieve emulsion recovery and impurity discharge, the screen assembly is a double-layer filter screen and is internally provided with a magnetic bar, impurities are intercepted in a layered mode, magnetic impurities are adsorbed, dismounting and mounting are convenient and fast, and the automatic control assembly is connected with the monitoring module through a monitoring module, a PLC and an executing mechanism. Differential pressure alarming, automatic switching, liquid supplementing, liquid filling and timed pollution discharging are achieved, signals can be remotely transmitted to a control room, the advantages of being high in filtering precision, small in pressure loss, continuous in operation and high in automation degree are achieved, and the production efficiency and the product quality of the rolling mill are effectively guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of rolling mill emulsion pipeline filtration equipment, specifically relating to an integrated intelligent dual-cylinder magnetic screen filtration device and its filtration method for emulsion. Background Technology

[0002] During the rolling mill production process, the emulsion system provides cooling and lubrication for the work rolls. However, solid debris such as sealing fragments, welding slag, sand, and wood chips can easily get mixed into its pipelines. These debris can cause a series of problems: First, they can clog the nozzles of the cooling spray beams on the work rolls, leading to system shutdown. During the shutdown, emulsion leakage can cause surface quality defects in the rolled products. Second, debris may be rolled into the space between the rolls, causing damage to the rolls. This not only affects the quality of subsequent products but also requires the replacement of the rolls, resulting in rolling time loss and reduced production efficiency. Existing technologies lack efficient filtration equipment for this scenario. Conventional filters suffer from problems such as insufficient filtration accuracy, large pressure loss, need to stop the machine when replacing the filter screen, and serious emulsion waste, which cannot meet the needs of continuous production in rolling mills. To address this, we propose an integrated intelligent dual-cylinder magnetic screen filtration device and its filtration method for emulsions. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated intelligent dual-cylinder magnetic sieve filtration device and filtration method for emulsions, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions, comprising: A dual-cylinder filter assembly, comprising two identical single-cylinder filters operating alternately, is used to receive and filter the emulsion transported from the emulsion main pipe. A connecting pipe assembly is used to connect the two single-cylinder filters to realize the recycling of emulsion and centralized discharge of impurities when switching between the two single-cylinder filters; A screen assembly, detachably assembled inside each of the single-cylinder filters, is used to intercept solid debris in layers and adsorb magnetic impurities. The automated control component includes a monitoring module, a PLC controller, and an actuator. The monitoring module is used to monitor the pressure difference between the inlet and outlet of the single-cylinder filter and the emulsion level inside the cylinder. The PLC controller is electrically connected to the actuator and is used to control the switching, filling, replenishing, and timed sewage discharge operations of the two single-cylinder filters. The automated control component is also used to transmit signals to the control room for remote monitoring.

[0005] Preferably, the inlet and outlet of the two single-cylinder filters are connected by an inlet pipe and an outlet pipe; The inlet and outlet pipe diameters of the single-cylinder filter are adapted to the diameter of the emulsion main pipe, and the main cylinder diameter of the single-cylinder filter is 2-2.5 times the inlet and outlet pipe diameters.

[0006] Preferably, the top of the single-cylinder filter is an elliptical end cap structure, the top of the single-cylinder filter is provided with an exhaust valve with a copper ball valve, and the bottom of the single-cylinder filter is provided with a pneumatic drain valve; The single-cylinder filter is equipped with lifting lugs, and the single-cylinder filter is fixed to the ground by expansion bolts. The base of the single-cylinder filter is used for ground leveling by leveling pads.

[0007] Preferably, the connecting pipe assembly includes a main drain pipe, a branch drain pipe, and a liquid-filled bypass pipe; One end of the main sewage pipe is connected to the ditch, and the branch sewage pipes are connected to the sewage outlet of each of the single-cylinder filters; One end of the liquid-filling bypass pipe is connected to the drain port of the single-cylinder filter, and the other end is connected to the main drain pipe, for conveying emulsion between the two single-cylinder filters.

[0008] Preferably, the screen assembly is a double-layer filter screen with a built-in magnetic rod, and the double-layer filter screen of the screen assembly includes an inner coarse filter screen and an outer fine filter screen. The screen assembly also includes a cover plate and a pull rod. The cover plate is disposed at the upper and lower ends of the double-layer filter screen, and the pull rod is connected between the cover plates for fixing the cover plates and positioning the double-layer filter screen. The cover plate is provided with a handle for disassembling and assembling the filter assembly.

[0009] Preferably, the double-layer filter screen is made of SUS304 stainless steel with a thickness of ≥2mm, the inner coarse filter screen is 10 mesh, and the outer fine filter screen is 20-30 mesh.

[0010] Preferably, the monitoring module includes a differential pressure gauge and a liquid level sensor, the differential pressure gauge being connected between the inlet pipe and the outlet pipe, and the liquid level sensor being disposed inside the single-cylinder filter. The actuator includes a pneumatic butterfly valve, and the pneumatic butterfly valve is installed at both ends of the inlet pipe and the outlet pipe near the single-cylinder filter. The PLC controller triggers a differential pressure alarm based on the differential pressure gauge monitoring data, and controls liquid replenishment, filling, and sewage discharge actions based on the liquid level monitoring data from the liquid level sensor.

[0011] A filtration method for an integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions includes the following steps: S1. Initial settings: Set the two single-cylinder filters as the running cylinder and the standby cylinder respectively, start the actuator corresponding to the running cylinder, and make the emulsion flow through the inlet pipe into the running cylinder for filtration; S2. Filtration operation: After the emulsion enters the operating cylinder, it passes through the double-layer filter screen of the screen assembly to intercept solid impurities in layers. The built-in magnetic rod adsorbs magnetic impurities. The filtered emulsion is discharged from the outlet pipe to the emulsion pipeline. S3. Status monitoring: The differential pressure gauge collects the pressure difference data at the inlet and outlet of the operating cylinder in real time, and the liquid level sensor collects the liquid level data of the emulsion in the two single-cylinder filters in real time. All data are synchronously transmitted to the PLC controller and the remote control room. S4. Switching control: When the pressure difference of the running cylinder reaches the set threshold, the PLC controller starts the switching program and fills the standby cylinder with liquid through the liquid filling bypass pipe of the connecting pipe assembly. After the liquid filling is completed, the standby cylinder is switched to the new running cylinder, and the original running cylinder becomes the standby cylinder. S5. Liquid replenishment control: When the liquid level in any single-cylinder filter is lower than the set lower limit, the PLC controller automatically starts the liquid replenishment pump and opens the liquid replenishment valve. Liquid replenishment stops when the liquid level reaches the upper limit. If the liquid level still does not reach the lower limit after the preset liquid replenishment time, a liquid replenishment fault alarm is triggered. S6. Timed Drainage: The PLC controller controls the spare cylinder to discharge impurities through the main drain pipe and branch drain pipes of the connecting pipe assembly according to the preset drainage cycle and duration. If the liquid level is lower than the lower limit during drainage, drainage will be suspended and will resume after the liquid is replenished.

[0012] Preferably, the liquid filling process in step S4 specifically includes: The PLC controller first closes the main drain valve on the main drain pipe of the connecting pipe assembly, opens the bypass valve of the filling bypass pipe, and slowly opens the filling valve of the spare cylinder. The liquid level in the spare cylinder is monitored by the liquid level sensor. When the liquid level reaches 80%, the filling valve and the bypass valve are closed to complete the filling process. If the liquid level rises too slowly during the filling process, it is determined that the filling pipeline is blocked and an alarm is triggered.

[0013] Preferably, the preset fluid replenishment time in step S5 is 3 minutes; The draining action in step S6 is only performed on the spare tank. When the liquid level is lower than the set lower limit during draining, the PLC controller pauses the draining program and restarts the draining after the liquid is replenished.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. High filtration accuracy and significant protection effect: The composite filtration structure of "inner 10-mesh coarse filter, outer 20-30 mesh fine filter and built-in magnetic rod" can intercept solid impurities of different particle sizes in layers, while adsorbing magnetic impurities, effectively avoiding nozzle clogging and roller damage, and ensuring product quality. 2. Low pressure loss and high operating efficiency: The main cylinder diameter of the single-cylinder filter is 2-2.5 times the inlet and outlet pipe diameter, which greatly reduces the flow resistance of the emulsion, does not affect the system circulation efficiency, and meets the cooling and lubrication requirements of the rolling mill. 3. Continuous production assurance and minimal downtime losses: The dual-cylinder "one in use, one on standby" alternating operation mode can achieve seamless switching through automated control. Filter replacement can be performed without interrupting production, significantly improving production efficiency. 4. Less emulsion waste, energy saving and environmental protection: The connecting pipe assembly integrates sewage discharge and liquid filling functions. When switching between dual cylinders, the emulsion can be recovered to the empty cylinder through the liquid filling bypass pipe to avoid waste; timed sewage discharge and intelligent liquid replenishment control further reduce emulsion loss; 5. High degree of automation and convenient operation: The PLC controller realizes intelligent control of the entire process, including differential pressure monitoring, automatic switching, liquid replenishment, liquid filling, and timed sewage discharge. Data is transmitted to the control room, reducing the intensity of manual operation; the filter assembly is equipped with a special handle and lifting lug for easy disassembly and assembly. 6. Strong adaptability, stable structure, and long service life: The main body and flow parts of the equipment are made of SUS304 stainless steel. The bottom is made of a 35mm thick solid steel plate, and the top is an elliptical end cap. It is suitable for 1.6MPa pressure. It has high structural strength, strong corrosion resistance, and long service life. The equipment can be adapted to ground with different flatness through leveling pads. It supports forklift or crane movement and positioning, and is suitable for complex installation conditions at the rolling mill site. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the main structure of the present invention; Figure 5 This is a cross-sectional perspective view of the three-dimensional structure of the present invention; Figure 6 This is a three-dimensional structural diagram of the screen assembly of the present invention.

[0016] In the diagram: 1. Single-cylinder filter; 101. Inlet pipe; 102. Outlet pipe; 2. Exhaust valve; 3. Pneumatic drain valve; 4. Lifting lug; 5. Main drain pipe; 6. Branch drain pipe; 7. Liquid filling bypass pipe; 8. Double-layer filter screen; 9. Magnetic rod; 10. Cover plate; 11. Pull rod; 12. Handle; 13. Differential pressure gauge; 14. Pneumatic butterfly valve. Detailed Implementation

[0017] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-6 The intelligent dual-cylinder magnetic sieve integrated filtration device for emulsions provided by the present invention includes: The dual-cylinder filter assembly consists of two identical single-cylinder filters 1, which operate alternately to form a "one in use, one on standby" operating mode. It is used to receive the emulsion transported by the emulsion main pipe and complete the filtration process, ensuring that the machine can be replaced without stopping the machine. The inlet and outlet of the two single-cylinder filters 1 are connected through inlet pipe 101 and outlet pipe 102. The inlet and outlet pipe diameters of the single-cylinder filter 1 are adapted to the diameter of the emulsion main pipe. The main cylinder diameter of the single-cylinder filter 1 is 2-2.5 times the inlet and outlet pipe diameters to reduce system pressure loss. Considering the actual working condition that the emulsion main pipe diameter is DN300, the inlet and outlet pipe diameters of the single-cylinder filter 1 are DN350 and the main cylinder diameter is DN700, which not only meets the flow requirements but also effectively reduces pressure loss. The top of the single-cylinder filter 1 has an elliptical end cap structure, which is conducive to pressure bearing and easy to vent. The top of the single-cylinder filter 1 is equipped with an exhaust valve 2 with a copper ball valve to vent the air inside the cylinder and prevent air blockage from affecting the filtration effect. The bottom of the single-cylinder filter 1 is equipped with a pneumatic drain valve 3 to discharge the intercepted impurities. The bottom of the single-cylinder filter 1 is made of a single piece of 35mm thick SUS304 stainless steel plate to ensure the strength of the bottom structure and to withstand a pressure of 1.6MPa. The main cylinder wall thickness of the single-cylinder filter 1 is 10mm, the inlet and outlet wall thickness is 8mm, and the flow contact surface and the equipment body are all made of SUS304 stainless steel, which has good corrosion resistance and wear resistance. The single-cylinder filter 1 body and the top cover are equipped with lifting lugs 4, which facilitate the disassembly and assembly of the filter screen assembly and the hoisting of the equipment; the single-cylinder filter 1 is fixed to the ground by expansion bolts. Its base is relatively large. If the ground is uneven, it can be leveled by leveling shims to ensure stable operation of the equipment; the bottom of the equipment is equipped with feet to raise the height of the equipment, which makes it easy for forklifts to lift from the bottom or cranes to lift from the top to move and position the equipment. The connecting pipe assembly is connected between the two single-cylinder filters 1 to realize the recycling of emulsion and centralized discharge of impurities when switching between the two single-cylinder filters 1, taking into account both sewage discharge and liquid filling functions, and reducing emulsion waste. The connecting pipe assembly includes a main drain pipe 5, branch drain pipes 6, and a liquid-filling bypass pipe 7. The main drain pipe 5 is DN32, with one end connected to the ditch for centralized discharge of impurities. The branch drain pipe 6 is DN25 and is connected to the drain port of each single-cell filter 1 to achieve impurity discharge from a single filter. One end of the liquid-filling bypass pipe 7 is connected to the drain port of the single-cell filter 1, and the other end is connected to the main drain pipe 5, forming an emulsion flow channel between two single-cell filters 1 for emulsion recovery and liquid filling during switching. The screen assembly is detachably assembled inside each single-cylinder filter 1. It is used to intercept solid debris in layers and adsorb magnetic impurities. It features convenient disassembly and assembly and a stable structure. The screen assembly is a double-layer filter screen 8 with a built-in magnetic rod 9. The double-layer filter screen 8 includes an inner coarse filter screen and an outer fine filter screen. The inner coarse filter screen is 10 mesh, which is used to initially intercept large particulate impurities. The outer fine filter screen is 20-30 mesh, which is used to accurately intercept small particulate impurities. The magnetic rod 9 is used to adsorb magnetic impurities in the emulsion, further improving the filtration accuracy. The screen assembly also includes a cover plate 10 made of SUS304 stainless steel and 10 M16 pull rods 11. The cover plate 10 is set at the upper and lower ends of the double-layer filter screen 8, and the pull rods 11 are connected between the cover plates 10, which can both fix the cover plate 10 and position the double-layer filter screen 8, taking into account both structural strength and fluid flow cross-sectional area. The cover plate 10 is equipped with a handle 12, which is made of SUS304 stainless steel with a thickness of ≥4mm and a height of 1100mm from the bottom, which is suitable for the lifting height of the lifting device and the operating height of the human body, so as to facilitate quick disassembly and assembly of the filter assembly. The double-layer filter screen 8 is made of SUS304 stainless steel with a thickness of ≥2mm. The screen body diameter is 650-700mm, which is suitable for the internal space of the single-cylinder filter 1 to ensure sufficient filtration area. The automated control component includes a monitoring module, a PLC controller, and an actuator. The monitoring module is used to monitor the pressure difference between the inlet and outlet of the single-cylinder filter 1 and the emulsion level inside the cylinder. The PLC controller is electrically connected to the actuator and is used to control the switching, filling, replenishing, and timed sewage discharge operations of the two single-cylinder filters 1. The automated control component is also used to transmit signals to the control room to achieve remote monitoring and reduce the intensity of manual operation. The monitoring module includes a differential pressure gauge 13 and a liquid level sensor. The differential pressure gauge 13 is connected between the inlet pipe 101 and the outlet pipe 102 to display the inlet and outlet pressure difference in real time. The liquid level sensor is installed inside the single-cylinder filter 1 to collect the liquid level data of the emulsion inside the cylinder in real time. The actuator includes a pneumatic butterfly valve 14, a replenishing pump, a replenishing valve, a main drain electric valve, and various control valves. Pneumatic butterfly valves 14 are installed at both ends of the inlet pipe 101 and the outlet pipe 102 near the single-cylinder filter 1 to control the start, stop, and switching of the single-cylinder filter 1. The replenishing pump and replenishing valve are used to replenish the emulsion into the cylinder. The main drain electric valve is installed on the main drain pipe 5 to control the opening and closing of the drain channel. The PLC controller triggers a differential pressure alarm based on the monitoring data from the differential pressure gauge 13 and the pressure transmitter, and controls the replenishment, filling and draining actions based on the liquid level monitoring data from the liquid level sensor. All monitoring data and control signals are transmitted to the control room to achieve remote monitoring and operation.

[0019] The filtration method of the intelligent dual-cylinder magnetic sieve integrated filtration device for emulsions provided by the present invention includes the following steps: S1. Initial settings: Set the two single-cylinder filters 1 as the running cylinder and the standby cylinder respectively. The PLC controller starts the pneumatic butterfly valve 14 corresponding to the running cylinder and closes the pneumatic butterfly valve 14 corresponding to the standby cylinder, so that the emulsion flows through the inlet pipe 101 through the running cylinder for filtration. At the same time, set parameters such as differential pressure threshold, upper and lower limits of liquid level, replenishment time, sewage discharge cycle and sewage discharge duration. S2. Filtration Operation: After the emulsion enters the running cylinder, it flows through the outer fine filter and the inner coarse filter of the screen assembly in sequence, intercepting solid impurities of different particle sizes in layers. The built-in magnetic rod 9 simultaneously adsorbs magnetic impurities in the emulsion. The filtered emulsion is discharged from the outlet pipe 102 to the emulsion pipeline to provide cooling and lubrication for the rolling mill work rolls. S3. Status monitoring: The differential pressure gauge 13 and pressure transmitter collect the differential pressure data at the inlet and outlet of the operating cylinder in real time, and the liquid level sensor collects the liquid level data of the emulsion in the two single-cylinder filters 1 in real time. All data are synchronously transmitted to the PLC controller and remote control room, and the operator can monitor the equipment operating status in real time. S4. Switching Control: When the pressure difference of the running cylinder reaches the set threshold, it indicates that the filter screen has blocked a large amount of impurities, and the standby cylinder needs to be switched to operation. The PLC controller starts the switching program and fills the standby cylinder with liquid through the liquid filling bypass pipe 7 of the connecting pipe assembly. The filling process is as follows: The PLC controller first closes the main drain electric valve on the drain pipe 5 of the connecting pipe assembly, opens the bypass valve of the filling bypass pipe 7, slowly opens the filling valve of the spare cylinder, monitors the liquid level of the spare cylinder through the liquid level sensor, and closes the filling valve and bypass valve when the liquid level reaches 80%, thus completing the filling process. If the liquid level rises too slowly during the filling process, it is determined that the filling pipeline is blocked and an alarm is triggered. After the liquid filling is completed, the PLC controller closes the pneumatic butterfly valve 14 of the original running cylinder and opens the pneumatic butterfly valve 14 of the standby cylinder, switching the standby cylinder to the new running cylinder, and the original running cylinder becomes the standby cylinder. Operators can replace the filter screen of the original running cylinder without affecting production. S5. Liquid replenishment control: When the liquid level in any single-cylinder filter 1 is lower than the set lower limit, the PLC controller automatically starts the liquid replenishment pump and opens the liquid replenishment valve to replenish the emulsion into the cylinder; when the liquid level reaches the upper limit, the liquid replenishment pump stops and the liquid replenishment valve closes. If the fluid level does not reach the lower limit after 3 minutes of fluid replenishment, a "fluid replenishment failure" alarm will be triggered, prompting the operator to check the fluid replenishment pump or fluid replenishment pipeline. S6. Timed sewage discharge: The PLC controller controls the spare cylinder to discharge impurities through the main sewage discharge pipe 5 and the branch sewage discharge pipe 6 of the connecting pipe assembly according to the preset sewage discharge cycle and duration. Specifically, the pneumatic sewage discharge valve 3 of the spare cylinder and the main sewage discharge electric valve on the main sewage discharge pipe 5 are opened to discharge the intercepted impurities into the ditch. If the liquid level sensor detects that the liquid level in the cylinder is lower than the set lower limit during sewage discharge, the PLC controller will pause the sewage discharge program and restart the sewage discharge after the liquid is replenished, so as to avoid damage to the equipment caused by empty cylinder sewage discharge.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. High filtration accuracy and significant protection effect: The composite filtration structure of "inner 10-mesh coarse filter, outer 20-30 mesh fine filter and built-in magnetic rod" can intercept solid impurities of different particle sizes in layers, while adsorbing magnetic impurities, effectively avoiding nozzle clogging and roller damage, and ensuring product quality. 2. Low pressure loss and high operating efficiency: The main cylinder diameter of the single-cylinder filter is 2-2.5 times the inlet and outlet pipe diameter, which greatly reduces the flow resistance of the emulsion, does not affect the system circulation efficiency, and meets the cooling and lubrication requirements of the rolling mill. 3. Continuous production assurance and minimal downtime losses: The dual-cylinder "one in use, one on standby" alternating operation mode can achieve seamless switching through automated control. Filter replacement can be performed without interrupting production, significantly improving production efficiency. 4. Less emulsion waste, energy saving and environmental protection: The connecting pipe assembly integrates sewage discharge and liquid filling functions. When switching between dual cylinders, the emulsion can be recovered to the empty cylinder through the liquid filling bypass pipe to avoid waste; timed sewage discharge and intelligent liquid replenishment control further reduce emulsion loss; 5. High degree of automation and convenient operation: The PLC controller realizes intelligent control of the entire process, including differential pressure monitoring, automatic switching, liquid replenishment, liquid filling, and timed sewage discharge. Data is transmitted to the control room, reducing the intensity of manual operation; the filter assembly is equipped with a special handle and lifting lug for easy disassembly and assembly. 6. Strong adaptability, stable structure, and long service life: The main body and flow parts of the equipment are made of SUS304 stainless steel. The bottom is made of a 35mm thick solid steel plate, and the top is an elliptical end cap. It is suitable for 1.6MPa pressure. It has high structural strength, strong corrosion resistance, and long service life. The equipment can be adapted to ground with different flatness through leveling pads. It supports forklift or crane movement and positioning, and is suitable for complex installation conditions at the rolling mill site.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions, characterized in that, include: A dual-cylinder filter assembly, comprising two identical single-cylinder filters (1) operating alternately, is used to receive the emulsion transported by the emulsion main pipe and complete the filtration process. The connecting pipe assembly is connected between the two single-cylinder filters (1) to realize the recycling of emulsion and centralized discharge of impurities when switching between the two single-cylinder filters (1); A screen assembly, detachably assembled inside each of the single-cylinder filters (1), is used to intercept solid debris in layers and adsorb magnetic impurities; The automated control component includes a monitoring module, a PLC controller, and an actuator. The monitoring module is used to monitor the pressure difference between the inlet and outlet of the single-cylinder filter (1) and the liquid level of the emulsion inside the cylinder. The PLC controller is electrically connected to the actuator and is used to control the switching, filling, replenishing and timed sewage discharge operations of the two single-cylinder filters (1). The automated control component is also used to transmit signals to the control room for remote monitoring.

2. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 1, characterized in that: The inlet and outlet of the two single-cylinder filters (1) are connected by an inlet pipe (101) and an outlet pipe (102); The inlet and outlet pipe diameters of the single-cylinder filter (1) are adapted to the diameter of the emulsion main pipe, and the main cylinder diameter of the single-cylinder filter (1) is 2-2.5 times the inlet and outlet pipe diameters.

3. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 1, characterized in that: The top of the single-cylinder filter (1) is an elliptical head structure. The top of the single-cylinder filter (1) is equipped with an exhaust valve (2) with a copper ball valve. The bottom of the single-cylinder filter (1) is equipped with a pneumatic drain valve (3). The single-cylinder filter (1) is provided with a lifting lug (4), the single-cylinder filter (1) is fixed to the ground by expansion bolts, and the base of the single-cylinder filter (1) is used for leveling the ground by leveling pads.

4. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 1, characterized in that: The connecting pipe assembly includes a main sewage pipe (5), a branch sewage pipe (6), and a liquid-filled bypass pipe (7). One end of the main sewage pipe (5) is connected to the ditch, and the branch sewage pipe (6) is connected to the sewage outlet of each of the single-cylinder filters (1); One end of the liquid filling bypass pipe (7) is connected to the drain port of the single-cylinder filter (1), and the other end is connected to the main drain pipe (5) for conveying emulsion between the two single-cylinder filters (1).

5. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 2, characterized in that: The screen assembly is a double-layer filter (8) with a built-in magnetic rod (9). The double-layer filter (8) of the screen assembly includes an inner coarse filter and an outer fine filter. The screen assembly also includes a cover plate (10) and a pull rod (11). The cover plate (10) is disposed at the upper and lower ends of the double-layer filter (8). The pull rod (11) is connected between the cover plates (10) for fixing the cover plate (10) and positioning the double-layer filter (8). The cover plate (10) is provided with a handle (12) for disassembling and assembling the filter assembly.

6. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 5, characterized in that: The double-layer filter screen (8) is made of SUS304 stainless steel with a thickness of ≥2mm. The inner coarse filter screen is 10 mesh and the outer fine filter screen is 20-30 mesh.

7. The integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to claim 2, characterized in that: The monitoring module includes a differential pressure gauge (13) and a liquid level sensor. The differential pressure gauge (13) is connected between the inlet pipe (101) and the outlet pipe (102). The liquid level sensor is located inside the single-cylinder filter (1). The actuator includes a pneumatic butterfly valve (14), and the pneumatic butterfly valve (14) is provided at both ends of the inlet pipe (101) and the outlet pipe (102) near the single-cylinder filter (1). The PLC controller triggers a differential pressure alarm based on the differential pressure gauge (13) monitoring data, and controls the replenishment, filling and draining actions based on the liquid level monitoring data of the liquid level sensor.

8. The filtration method of the integrated intelligent dual-cylinder magnetic sieve filtration device for emulsions according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Initial settings: Set the two single-cylinder filters (1) as the running cylinder and the standby cylinder respectively, start the actuator corresponding to the running cylinder, so that the emulsion flows through the inlet pipe (101) through the running cylinder for filtration; S2, Filtration operation: After the emulsion enters the operating cylinder, it passes through the double-layer filter screen of the screen assembly to intercept solid impurities in layers, and the built-in magnetic rod adsorbs magnetic impurities. The filtered emulsion is discharged to the emulsion pipeline through the outlet pipe (102). S3, Status monitoring: The differential pressure gauge (13) collects the differential pressure data of the inlet and outlet of the operating cylinder in real time, and the liquid level sensor collects the liquid level data of the emulsion in the two single cylinder filters (1) in real time. All data are synchronously transmitted to the PLC controller and remote control room. S4. Switching control: When the pressure difference of the running cylinder reaches the set threshold, the PLC controller starts the switching program and fills the standby cylinder with liquid through the liquid filling bypass pipe (7) of the connecting pipe assembly. After the liquid filling is completed, the standby cylinder is switched to the new running cylinder, and the original running cylinder is switched to the standby cylinder. S5, Liquid replenishment control: When the liquid level in any single-cylinder filter (1) is lower than the set lower limit, the PLC controller automatically starts the liquid replenishment pump and opens the liquid replenishment valve. When the liquid level reaches the upper limit, the liquid replenishment stops. If the liquid level still does not reach the lower limit after the preset liquid replenishment time, a liquid replenishment fault alarm is triggered. S6. Timed drainage: The PLC controller controls the spare cylinder to discharge impurities through the main drainage pipe (5) and branch drainage pipe (6) of the connecting pipe assembly according to the preset drainage cycle and duration. If the liquid level is lower than the lower limit during drainage, the drainage will be suspended and will resume after the liquid is replenished.

9. The filtration method of the intelligent dual-cylinder magnetic sieve integrated filtration device for emulsions according to claim 8, characterized in that: The filling process described in step S4 is as follows: The PLC controller first closes the main drain electric valve on the drain pipe (5) of the connecting pipe assembly, opens the bypass valve of the filling bypass pipe (7), slowly opens the filling valve of the spare cylinder, monitors the liquid level of the spare cylinder through the liquid level sensor, and closes the filling valve and bypass valve when the liquid level reaches 80% to complete the filling. If the liquid level rises too slowly during the filling process, it is determined that the filling pipeline is blocked and an alarm is triggered.

10. The filtration method of the intelligent dual-cylinder magnetic sieve integrated filtration device for emulsions according to claim 8, characterized in that: The preset fluid resuscitation time in step S5 is 3 minutes; The draining action in step S6 is only performed on the spare tank. When the liquid level is lower than the set lower limit during draining, the PLC controller pauses the draining program and restarts the draining after the liquid is replenished.

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