Device and method for monitoring and processing blockage of filling pipeline based on magnetic principle

Abstract

The present invention discloses a device and method for monitoring and treating blockage in a filling pipeline based on magnetic principles. The device includes a pipe blockage monitoring device and a treatment device. The pipe blockage monitoring device includes a monitoring pipeline, a pipe blockage monitoring mechanism, and an external circuit system. The pipe blockage monitoring mechanism includes a monitoring mechanism housing, magnetic powder, a magnetic powder box, and a pressure sensor. The external circuit system includes a power supply, a single-chip microcomputer, a PC, and a PLC. The pipe blockage monitoring mechanism is fixed below the monitoring pipeline, and the lower part of the pipe blockage monitoring mechanism is connected to the external circuit system. The pipe blockage monitoring mechanism can monitor the blockage phenomenon in the pipeline in real time. The treatment device includes a filling pump. When the pipeline is blocked, the pipe blockage monitoring device feeds back a pipe blockage signal to the PC, which controls the PLC to regulate the filling pump and clear the blocked pipe by increasing the pumping flow rate. The present invention improves the slurry conveying efficiency, saves the cost of regular pipeline cleaning, increases the service life of the pipeline, and can effectively reduce various risks caused by pipe blockage during the filling slurry conveying process.

Description

Technical Field

[0001] The present invention belongs to the technical field of filling pipeline monitoring and pipe blockage treatment, and in particular relates to a device and method for monitoring and treating filling pipeline blockage based on a magnetic principle. Background Art

[0002] Cemented backfill mining technology has become an important means of treating coal mine goafs, and is of great significance for improving resource utilization, reducing ecological damage and environmental pollution. Backfill slurry is a mixture of fly ash, coal gangue, cement and other raw materials that are quantitatively proportioned and mixed before being transported to the goaf via pipelines. However, during pipeline transportation, problems such as slurry segregation and sedimentation, insufficient surface pumping pressure, and debris entering the pipes can occur. These problems often cause pipeline blockages, affecting pipeline transportation speeds, causing construction interruptions, and even causing pipeline ruptures, severely impacting backfill operations and resulting in huge economic losses. Therefore, ensuring the smooth flow of the backfill pipeline transportation system is a key link in backfill mining.

[0003] Monitoring the segregation and precipitation of slurry in the filling pipeline can provide an early warning for pipeline blockage accidents. Since the slurry is affected by gravity, when segregation and precipitation occur in the pipeline, the density of the slurry near the bottom of the pipeline gradually increases. If it is not handled in time, it is easy to cause pipeline blockage, affecting the filling operation. In order to solve the pipe blockage problem, filling pipeline monitoring technology has become a focus of research. Chinese patent CN 114544071A discloses an online monitoring system for the conveying status of paste filling materials. Without affecting the conveying operation, it can monitor the conveying status of the slurry online, and predict whether the slurry in the pipeline is blocked by observing the conveying resistance loss, viscosity and flow state. Chinese patent CN106968709A discloses a pipe blockage monitoring device and monitoring method for paste filling pipelines. A certain proportion of magnetite sand is added to the filling paste, and the concentration of magnetite sand in the paste at different positions in the pipeline is measured on the conveying pipeline. When a pipe blockage occurs in the pipeline, the difference in the concentration of magnetite sand in the monitoring pipeline before and after the blocked position will help the user to accurately locate the blocked position. The above patent focuses on pipeline monitoring, and its monitoring method is online monitoring, which monitors pipe blockage by directly monitoring the physical properties of the slurry in the pipeline and adding magnetite sand. It is unable to independently judge and take relevant measures to deal with the blockage in time, affecting the progress of the filling operation.

[0004] The filling pipeline pressure valve and mining gas pressure device have similar structural principles. Existing literature reports on flow control of gas pressure devices. Chinese patent CN114778740A discloses a device for simulating the emission patterns of harmful gases from goafs under different conditions. The gas pressure device in this invention can simulate the emission patterns of gases under various atmospheric pressures. While this patent focuses on simulating gas conditions, it does not address effective solutions for pipeline blockages during slurry transportation, resulting in poor performance.

[0005] Currently, the methods for monitoring and treating pipe blockage in filling pipes are relatively simple. Most existing technologies focus on one of the three aspects: pipeline monitoring, pipeline anti-blocking, and pipe blockage treatment. There are few technologies that can achieve comprehensive pipeline treatment. They all rely on real-time online monitoring of the pipeline and are unable to independently monitor and clear the pipeline, requiring further innovation. Therefore, it is of great significance to establish a filling pipe system that comprehensively utilizes the three aspects of pipeline monitoring, pipeline anti-blocking, and pipe blockage treatment. To this end, the present invention proposes a device and method for monitoring and treating filling pipe blockage based on the magnetic principle, providing a new solution for filling pipe blockage and treatment. Summary of the Invention

[0006] The purpose of the present invention is to provide a device and method for monitoring and treating filling pipe blockage based on magnetic principles, effectively preventing the occurrence of pipe blockage due to segregation and precipitation of filling slurry during long-distance linear transportation, and ensuring the efficiency and orderliness of filling operations.

[0007] The principle behind this invention is that a magnetic powder box is innovatively designed within the monitoring mechanism. A certain amount of iron powder is added to the filler slurry. When a pipe becomes clogged, the accumulation of magnetic material increases at the blockage, increasing the magnetic attraction at the blocked location and attracting the magnetic powder in the outer magnetic powder box. A pressure sensor mounted below the magnetic powder box measures the magnetic powder in real time. When the measured weight is less than half the total mass of the magnetic powder, the pipe is deemed clogged, accurately locating the blockage. Magnetite sand is added to the filler slurry to a concentration of approximately 30%-40% by mass. At this point, the slurry in the pipe generates a magnetic attraction of approximately 0.1N. When the pipe becomes clogged, the slurry segregates and settles, gradually accumulating magnetite sand at the bottom of the pipe. This magnetic attraction increases, and the amount of magnetic powder attracted increases. The amount of magnetic powder attracted is then used by the pressure sensor at the bottom to determine the pipe blockage. The proportion of magnetite sand added can be adjusted based on the specific slurry transport requirements, ensuring that the magnetic attraction generated by the accumulated magnetic material exceeds half the weight of the magnetic powder when the pipe is blocked. When a pipe blockage is detected, this information is fed back to the control circuit system, which then controls the filling pump via the PLC to increase the pumping flow rate and resolve the blockage. Once the pipe blockage is resolved, the magnetic material accumulated at the original blockage location decreases, the magnetic attraction weakens, and the magnetic powder gradually falls. When the pressure sensor measures a mass greater than half the total mass of the magnetic powder, the blockage is determined to be resolved. A signal is then fed back to the filling pump to reduce the pumping flow rate, enabling monitoring and blockage resolution of the filling pipeline.

[0008] The present invention provides a device for monitoring and treating the blockage of a filling pipe based on the magnetic principle, comprising a pipe blockage monitoring device and a treatment device;

[0009] The pipe blockage monitoring device includes a monitoring pipeline, a pipe blockage monitoring mechanism, and an external circuit system. The pipe blockage monitoring mechanism includes a monitoring mechanism housing, magnetic powder, a magnetic powder cartridge, and a pressure sensor. The external circuit system includes a power supply, a single-chip microcomputer, a PC, and a PLC. The pipe blockage monitoring mechanism is fixed below the monitoring pipeline, and the lower portion of the pipe blockage monitoring mechanism is connected to the external circuit system. The pipe blockage monitoring mechanism can monitor pipe blockages in real time to ensure that the blockage is cleared promptly.

[0010] The processing device includes a filling pump; the filling pump is connected to the PC and PLC of the external circuit system to form a chain control; when the pipeline is blocked, the pipe blockage monitoring device feeds back the pipe blockage signal to the PC, and the PC controls the PLC to regulate the filling pump, thereby clearing the blocked pipe by increasing the pumping flow.

[0011] Specifically, the pipe blockage monitoring mechanism is a rectangular parallelepiped structure, mounted below the monitoring pipe via a hook. A magnetic powder box and pressure sensor are housed within the rectangular shell. The pressure sensor is housed in an acrylic box and connected to the magnetic powder box via a spring. It is also connected to the microcontroller via a wire. Due to the influence of gravity, the filling slurry will undergo segregation and sedimentation during long-distance linear transport. By adding magnetic material to the slurry, the amount of magnetic material increases at the location where the pipe is blocked, increasing the magnetic force and generating a magnetic attraction to the magnetic powder in the magnetic powder box of the monitoring mechanism located below the pipe. This attraction draws the magnetic powder in the magnetic powder box to the top plate of the box, reducing the amount of magnetic powder in the box and changing the pressure sensor reading, thereby enabling real-time monitoring of the filling pipe.

[0012] The external circuit system includes a power supply, a single-chip microcomputer, a PC, and a PLC. The single-chip microcomputer monitors the data of the pressure sensor in real time. When the data of the pressure sensor is less than the judgment value, the data is transmitted to the PC. The PC integrates and processes the data and edits the control instructions to transmit to the PLC. The PLC controls the filling pump to increase the pumping flow to deal with the pipe blockage. The power supply provides power supply for the single-chip microcomputer, PC, and PLC. The above calculation is based on: 50 grams of magnetic powder is added to the magnetic powder box, and the judgment value is set to where m 0磁重 =The total weight of magnetic powder in the magnetic powder cartridge. Depending on the design dimensions of the pipeline, the added magnetite sand accounts for 30%-40%. At this point, the slurry in the pipeline generates a magnetic attraction of approximately 0.1N, capable of attracting approximately 10g of magnetic powder. When a pipe is blocked, magnetic material gradually accumulates in the pipeline, increasing the magnetic attraction to 0.25N and attracting approximately 25g of magnetic powder, indicating a pipe blockage.

[0013] In the above-mentioned device, the monitoring pipeline is a long-distance horizontal linear transport pump-type filling pipeline, i.e., the existing slurry delivery pipeline in the system. This invention focuses on this long-distance horizontal linear transport pump-type filling pipeline as the research object. A pipe blockage monitoring mechanism is installed at the bottom of this portion of the pipeline, which is the monitoring pipeline described in this device. The monitoring pipelines are connected by flanges. One of the characteristics of this invention is that it does not require specially designed pipelines to replace the existing pipelines.

[0014] Furthermore, each section of the monitoring pipeline is 20 meters long and 2 centimeters thick. The magnetic powder box of the monitoring mechanism is installed in the lower middle position of the pipeline, and a monitoring mechanism is installed on each section of the pipeline.

[0015] In the aforementioned device, the pipe blockage monitoring mechanism includes a monitoring housing, magnetic powder, a magnetic powder cartridge, and a pressure sensor. The magnetic powder is primarily made of Fe₃O₄. Two pipe hooks are installed at the bottom of the monitoring pipe. Two external retaining rings are attached to the top of the monitoring housing. The pipe hooks connect to the external retaining rings, hooking onto the monitoring housing and suspending the monitoring mechanism below the pipe. The external retaining rings are semicircular rings with a diameter of 1 cm.

[0016] In the above device, there are two top plate hooks on the top inner side of the monitoring mechanism shell, and two inner fixing rings are designed above the top plate of the magnetic powder box. The top plate hooks are connected to the inner fixing rings so that the top plate of the magnetic powder box is suspended above the monitoring mechanism shell without contacting the magnetic powder box, thereby ensuring the accuracy of the pressure sensor reading. The size of the inner fixing ring is a semicircular ring with a diameter of 1 cm.

[0017] In the above device, when the pipe is blocked, the iron powder concentration at the blocked area increases, and the magnetic attraction generated is greater than the gravity of the magnetic powder itself, and the magnetic powder will be sucked up. The pressure sensor will monitor the weight of the magnetic powder in the magnetic powder box in real time. The total mass of the magnetic powder in the magnetic powder box is m 0磁重 , the monitoring reading of the pressure sensor is m 磁重 ,when When the pipe is blocked, the pressure sensor will send a signal in real time. The total mass of the magnetic powder is generally m 0磁重 The magnetic attraction is approximately 30g-80g. Depending on the design size of the pipeline, the added magnetite sand accounts for 30%-40%. During normal filling operations, the magnetic attraction of the pipeline is approximately 0.08N-0.12N, and in the event of pipe blockage, it is approximately 0.15N-0.4N. Therefore, when a pipe is blocked, approximately 15g-40g of magnetic powder can be attracted to determine the pipe blockage. Different mining companies can adjust the proportion of added magnetite sand and the amount of magnetic powder in the magnetic powder box according to the requirements of the conveying slurry, ensuring that the magnetic attraction generated by the accumulation of magnetic material in the event of pipe blockage is greater than half of the total weight of the magnetic powder.

[0018] In the above device, the monitoring mechanism housing fixes the magnetic powder box and the pressure sensor to prevent the magnetic powder judgment device from shifting and affecting the monitoring. The pressure sensor is set in the acrylic box and connected to the magnetic powder box through a spring. The monitoring method is to monitor the reading of the pressure sensor. , indicating that the pipe is blocked.

[0019] In the above device, the magnetic powder box used in the pipeline monitoring mechanism is made of acrylic material, and the design size of the magnetic powder box is 200mm×150mm×100mm, which prevents the magnetic powder from falling out of the range of the pressure sensor and causing weighing errors, thereby ensuring the accuracy of the monitoring results.

[0020] In the above device, the shell of the monitoring mechanism is made of acrylic material. The design size of the monitoring device shell is 400mm×300mm×200mm. It is connected to the pipeline through two pipe hooks to fix the magnetic powder box and pressure sensor to ensure accurate monitoring results.

[0021] In the above device, the filling pump for handling pipe blockage can use a single motor or multiple motors, and the motor power needs to meet the conditions of industrial and mining use, that is, when working normally, the filling pump pumping flow rate should be 80m 3 / h-180m 3 / h range, the outlet pressure is about 7MPa-16MPa. When the pipeline is blocked, the monitoring device will feed back the blocking signal to the PC computer, and the PC computer will control the PLC to increase the pipeline pumping flow to the maximum output value of 150m 3 / h-200m 3 / h or so to solve the pipe blockage.

[0022] The present invention provides a method for monitoring and treating filling pipe blockage based on magnetic principles, comprising the following steps:

[0023] (1) Connect the power supply to the pressure sensor, single-chip microcomputer, PC computer, and PLC respectively to provide them with power supply guarantee; the pipeline monitoring mechanism is installed below the monitoring pipeline, and the pressure sensor, single-chip microcomputer, PC computer and PLC are connected in sequence. Each component is connected in series through a wire to transmit the signal;

[0024] (2) The pipe blockage monitoring mechanism realizes real-time monitoring of the pipeline through the weighing of the pressure sensor. The pressure sensor transmits the monitored data to the single-chip microcomputer, and the single-chip microcomputer transmits the processed data to the PC computer. The PC computer judges the signal from the single-chip microcomputer and sends control instructions to the PLC to realize the control of the filling pump flow;

[0025] (3) Use pipeline monitoring mechanism to judge the blockage of pipeline; when pipeline is blocked, the concentration of iron powder at the blockage increases, and the magnetic attraction force generated is greater than the gravity of magnetic powder itself, magnetic powder will be sucked up, and pressure sensor will monitor the weight of magnetic powder in magnetic powder box in real time. When the mass of magnetic powder in the magnetic powder box is sucked up, it is greater than This means that at least half of the magnetic powder in the magnetic powder box has been sucked up, and the pipeline is considered to be blocked;

[0026] (4) When the pipeline is detected to be blocked, the PLC controls the filling pump to increase the pumping flow rate to the maximum output value of 150m 3 / h-200m 3 / h, as the flow rate increases, the conveying pressure in the pipe gradually increases, which can make the slurry accumulated at the bottom of the pipe flow again, the magnetic material at the pipe blockage gradually decreases, the magnetic attraction gradually decreases, and the magnetic powder gradually falls down, that is, when When the magnetic powder box is filled with more than half of the magnetic powder, it is determined that the pipeline blockage problem has been solved. At this time, the signal is sent to the PC computer, and the filling pump is controlled by the PLC to adjust the pumping flow back to the normal value of 80m 3 / h-180m 3 / h; the device can realize signal transmission and pumping flow control through an external circuit system;

[0027] (5) After the pumping flow returns to normal, the monitoring and treatment of filling pipe blockage is completed; the pressure sensor will continuously monitor the weight of the magnetic powder in the magnetic powder box in real time, and transmit the measured data to the external circuit system in real time, realizing closed-loop control of filling pipe blockage monitoring and treatment.

[0028] The beneficial effects brought by the present invention are:

[0029] (1) The present invention realizes real-time monitoring of filling pipeline blockage based on the principle of magnetic attraction, which can greatly improve the pipeline transportation efficiency. The magnetic powder adsorption situation is used as a monitoring medium for the flow state of slurry in the pipeline. When the pipe is blocked, the magnetic powder is adsorbed, and the reading of the pressure sensor connected to the bottom of the magnetic powder box decreases. The monitoring data is fed back to the external control circuit to control the PLC, realizing automatic control of monitoring and unblocking in the slurry transportation pipeline, effectively improving the efficiency of handling pipe blockage, reducing the risk of pipeline wear, and increasing the service life of the pipeline. It is of great significance in preventing blockage in filling pipelines.

[0030] (2) The pipeline monitoring device used in the present invention does not require replacement of the original pipeline, saving costs. It only needs to install a hook to fix the monitoring device on the surface of the monitoring pipeline, which greatly maintains the integrity of the original pipeline and reduces the interference of the monitoring device on the slurry flow state in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a device for monitoring filling pipe blockage using the magnetic principle of the present invention;

[0032] Figure 2 This is an illustration of the pipeline monitoring device of the present invention;

[0033] Figure 3 is a schematic diagram of the monitoring device and processing system of the present invention;

[0034] Figure 4 This is a schematic diagram of the pipeline blockage state in the present invention;

[0035] Figure 5This is a schematic diagram of the pipeline in the present invention when it is not blocked.

[0036] In the figure, 1 is a pressure sensor, 2 is a nut, 3 is a single-chip microcomputer, 4 is a PC computer, 5 is a PLC, 6 is a power supply, 7 is a filling pump, 8 is a flange, 9 is a magnetic powder box, 10 is a top plate of the magnetic powder box, 11 is magnetic powder, 12 is a top plate hook, 13 is a blockage, 14 is a pipeline monitoring mechanism, 15 is a pipeline hook, 16 is a monitoring mechanism housing, 17 is an outer fixing ring, 18 is a monitoring pipeline, 19 is a pumping pipeline, and 20 is an inner fixing ring. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but is not limited to the following description.

[0038] The present invention provides a device for monitoring and treating the blockage of a filling pipe based on the magnetic principle, comprising a pipe blockage monitoring device and a treatment device;

[0039] The pipe blockage monitoring device includes a monitoring pipe 18, a pipe blockage monitoring mechanism 14, and an external circuit system. The pipe blockage monitoring mechanism 14 includes a monitoring mechanism housing 16, magnetic powder 11, a magnetic powder cartridge 9, and a pressure sensor 1. The external circuit system includes a power supply 6, a single-chip microcomputer 3, a PC 4, and a PLC 5. The pipe blockage monitoring mechanism 14 is fixed below the monitoring pipe 18, and the lower portion of the pipe blockage monitoring mechanism 14 is connected to the external circuit system. The pipe blockage monitoring mechanism 14 can monitor pipe blockage in real time to ensure that the blockage is cleared promptly.

[0040] The processing device includes a filling pump 7; the filling pump 7 is connected to the PC computer 4 and PLC 5 of the external circuit system to form a chain control; when the pipeline is blocked, the pipe blocking monitoring device feeds back the blocking signal to the PC computer 4, and the PC computer 4 controls the PLC 5 to regulate the filling pump 7 and clear the blocked pipe by increasing the pumping flow. Figure 3 As shown, the outlet of the filling pump 7 is connected to the inlet of the slurry delivery pipeline. When the pipeline is blocked, the pumping force of the filling pump 7 is increased to perform blockage treatment on the slurry at the blocked part of the pipeline.

[0041] Specifically, the pipe blockage monitoring mechanism 14 is a rectangular parallelepiped structure, which is installed below the monitoring pipe 18 via a hook. A magnetic powder box 9 and a pressure sensor 1 are installed in the rectangular parallelepiped shell. The pressure sensor 1 is placed in an acrylic box and is connected to the magnetic powder box 9 via a spring and is connected to the single-chip computer 3 via a wire. Under the influence of gravity, the filling slurry will undergo segregation and precipitation during long-distance straight-line transportation. When magnetic material is added to the slurry, the magnetic material increases at the location where the pipe is blocked, and the magnetic force increases, generating a magnetic attraction force on the magnetic powder in the magnetic powder box 9 of the pipe blockage monitoring mechanism 14 located below the pipe. The magnetic powder 11 in the magnetic powder box 9 can be attracted to the top plate 10 of the magnetic powder box. The magnetic powder 11 in the magnetic powder box 9 decreases, and the reading of the pressure sensor 1 at the bottom of the magnetic powder box 10 changes, thereby achieving real-time monitoring of the filling pipe.

[0042] The pipe blockage monitoring mechanism consists of magnetic powder 11, magnetic powder box 9, and pressure sensor 1. When a pipe blockage occurs, the magnetism of the slurry at the blocked location increases, and the generated magnetic force is greater than the gravity of the magnetic powder itself, which attracts the magnetic powder 11 in the magnetic powder box 9, causing the pressure sensor reading to change, allowing real-time monitoring of pipe blockage. The pressure sensor 1 will monitor the weight of the magnetic powder in the magnetic powder box 9 in real time. Assuming that the gravity of the magnetic powder is m when the pipe is not blocked 0磁重 , the reading of pressure sensor 1 is m 磁重 ,when When the pressure sensor 1 is 50g, it means that the pipeline is blocked and the pressure sensor 1 will send a signal in real time. The above calculation is based on the following: 50g of magnetic powder is added to the magnetic powder box 9, and the judgment value is set to where m 0磁重 =The total weight of magnetic powder 11 in magnetic powder box 9. Based on the pipeline design dimensions, the added magnetite sand accounts for 35%. At this time, the magnetic attraction generated by the slurry in the pipeline is about 0.1N, which can attract about 10g of magnetic powder. When the pipeline is blocked, the magnetic material gradually accumulates in the pipeline, and the magnetic attraction increases to 0.25N. The mass of magnetic powder attracted is about 25g, indicating that the pipeline is blocked.

[0043] The main material of magnetic powder is Fe3O4.

[0044] The external circuit consists of a power supply 6, a single-chip microcomputer 3, a PC 4, and a programmable logic controller (PLC) 5. The pressure sensor 1 sends real-time signals to the single-chip microcomputer 3, which transmits the signals to the PC 4, which in turn transmits the signals to the PLC 5. The single-chip microcomputer 3 monitors the data from the pressure sensor 1 in real time. When the data from the pressure sensor 1 is less than the threshold, it transmits the data to the PC 4, which integrates and processes the data, edits and transmits control instructions to the PLC 5. The PLC 5 controls the filling pump 7 to pump and pressurize the pipe to eliminate the blockage. The power supply 6 provides power to the single-chip microcomputer 3, the PC 4, and the PLC 5.

[0045] In the above-described device, monitoring pipe 18 is a long-distance horizontal linear transport pump-type filling pipe, i.e., the existing slurry transport pipe in the system, and no specially designed pipe is required to replace the existing pipe. The present invention focuses on a long-distance horizontal linear transport pump-type filling pipe. A pipe blockage monitoring mechanism 14 is installed at the bottom of this pipe, representing monitoring pipe 18 in this device. Monitoring pipes 18 are connected by flanges 8.

[0046] Specifically, the length of each section of the monitoring pipeline is 5 meters, the thickness of the pipeline is 2.5 centimeters, the magnetic powder box 9 of the monitoring mechanism is installed in the lower middle position of the pipeline, and a monitoring mechanism is installed on each section of the monitoring pipeline 18.

[0047] In the above device, when the pipe is blocked, the iron powder concentration at the blocked area increases, and the magnetic attraction generated is greater than the gravity of the magnetic powder 11 itself, and the magnetic powder will be sucked up. The pressure sensor 1 will monitor the weight of the magnetic powder in the magnetic powder box 9 in real time. The total mass of the magnetic powder in the magnetic powder box 9 is m 0磁重 , the monitoring reading of pressure sensor 1 is m 磁重 ,when When the pipe is blocked, the pressure sensor 1 will send a signal in real time. Generally, the total mass of the magnetic powder 11 is m 0磁重 30g-80g.

[0048] In the above device, two pipe hooks 15 are set at the bottom of the monitoring pipe 18, and two outer fixing rings 17 are arranged on the outer side of the top surface of the monitoring mechanism shell 16. The pipe hooks 15 are connected to the outer fixing rings 17 to hook the monitoring mechanism shell 16 and fix the entire monitoring mechanism so that the monitoring mechanism is suspended under the pipe. The size of the outer fixing ring 17 is a semicircular ring with a diameter of 1 cm.

[0049] There are two top plate hooks on the inner side of the top surface of the monitoring mechanism housing 16, and two inner fixing rings are designed above the magnetic powder box top plate 10. The top plate hooks 12 are connected to the inner fixing ring 20, so that the magnetic powder box top plate 10 is suspended above the monitoring mechanism housing 16 without contacting the magnetic powder box 9, ensuring the accuracy of the pressure sensor 1 reading. The size of the inner fixing ring 20 is a semicircular ring with a diameter of 1 cm.

[0050] In the above device, the monitoring mechanism housing 16 fixes the magnetic powder box 9 and the pressure sensor 1 to prevent the magnetic powder 11 from shifting and affecting the monitoring. The pressure sensor is set in the acrylic box and connected to the magnetic powder box through a spring. The monitoring method is to monitor the reading of the pressure sensor. , indicating that the pipe is blocked.

[0051] In the above device, the magnetic powder box 9 used in the pipeline monitoring mechanism 14 is made of acrylic material. The design size of the magnetic powder box 9 is 200mm×150mm×100mm, which prevents the magnetic powder 11 from falling out of the range of the pressure sensor 1 and causing weighing errors, thereby ensuring the accuracy of the monitoring results.

[0052] In the above device, the monitoring mechanism housing 16 is made of acrylic material, and the design size of the monitoring mechanism housing 16 is 400mm×300mm×200mm. It is connected to the pipeline through two pipeline hooks 15 to fix the magnetic powder box 9 and the pressure sensor 1 to ensure accurate monitoring results.

[0053] The present invention provides a method for monitoring and treating filling pipe blockage based on magnetic principles, comprising the following steps:

[0054] (1) Power supply 6 is connected to pressure sensor 1, single-chip computer 3, PC computer 4, and PLC 5 through wires to provide them with power. The pipeline monitoring mechanism is installed below the monitoring pipeline. Pressure sensor 1, single-chip computer 3, PC computer 4, and PLC 5 are connected in series through wires to transmit signals.

[0055] (2) Use the pipe blockage monitoring mechanism to determine the blockage of the pipeline. When the pipeline is blocked, the magnetic powder 11 is attracted, and the pressure sensor 1 will monitor the weight of the magnetic powder 11 in the magnetic powder box 9 in real time. Assume that the gravity of the magnetic powder 11 when the pipeline is not blocked is m 0磁重 , the reading of pressure sensor 1 is m 磁重 ,when When the pressure drops below 0.05, it indicates that the pipeline is blocked and the pressure sensor 1 will send a signal in real time.

[0056] In this embodiment, the total mass of the magnetic powder 11 is m 0磁重 The amount of magnetite added is 50g. Depending on the design size of the pipeline, the proportion of magnetite sand added is 30%-40%. The magnetic attraction force of the pipeline is approximately 0.1N during normal filling operation and approximately 0.25N when the pipeline is blocked. Therefore, when the pipeline is blocked, approximately 25g of magnetic powder 11 can be sucked up to determine the pipeline blockage. Different industrial and mining companies can adjust the proportion of magnetite added and the amount of magnetic powder in the magnetic powder box according to the requirements of the slurry conveying, ensuring that the magnetic attraction generated by the accumulation of magnetic material when the pipeline is blocked is greater than half of the total weight of the magnetic powder 11.

[0057] (3) When the pressure sensor 1 shows When the blockage signal is transmitted to the single chip computer 3 through the circuit for data processing, the single chip computer 3 transmits the processed data to the PC computer 4, and the PC computer 4 sends the signal to the PLC 5 through the circuit.

[0058] (4) After receiving the pipe blocking signal, PLC5 will control the filling pump 7 to increase the pumping force, thereby solving the pipe blockage;

[0059] The filling pump 7 for handling pipeline blockage uses a dual motor with a motor power of 2×250kW. When working normally, the pumping flow of the filling pump 7 is about 120m 3 / h, the outlet pressure is about 11MPa. When the pipeline is blocked, the monitoring device will feed back the blocking signal to the PC computer 4, which will control the PLC5 to increase the pipeline pumping flow to the maximum output value of 150m 3 / h, at this time the outlet pressure is about 14MPa, thus achieving the treatment of pipe blockage.

[0060] (5) After the pipeline blockage problem is solved, the iron powder concentration at the blockage will decrease, the attraction to the magnetic powder 11 will decrease, the magnetic force generated will be smaller than the gravity of the magnetic powder itself, and the magnetic powder 11 will fall. When the pressure sensor 1 sends a signal to the single chip computer 3 for processing, the single chip computer 3 sends the processed signal to the PC computer 4, the PC computer 4 transmits the signal to the PLC5 through the circuit, and the PLC5 controls the filling pump to reduce the pumping force to normal.

[0061] (6) After the pumping flow rate returns to normal, the pressure sensor 1 will continue to monitor the weight of the magnetic powder 11 in the magnetic powder box 9 in real time and send the monitoring data to the single-chip microcomputer 3 in real time. The single-chip microcomputer 3 will send the processed signal to the PC 4, and the PC 4 will transmit the signal to the PLC 5. The entire system will continue to monitor the pipeline blockage.

Claims

1. A device for monitoring and treating filling pipe blockage based on magnetic principles, characterized by: Including pipe blockage monitoring device and treatment device; The pipe blockage monitoring device includes a monitoring pipeline, a pipe blockage monitoring mechanism, and an external circuit system. The pipe blockage monitoring mechanism includes a monitoring mechanism housing, magnetic powder, a magnetic powder cartridge, and a pressure sensor. The external circuit system includes a power supply, a single-chip microcomputer, a PC, and a PLC. The pipe blockage monitoring mechanism is fixed below the monitoring pipeline, and the lower portion of the pipe blockage monitoring mechanism is connected to the external circuit system. The pipe blockage monitoring mechanism can monitor pipe blockages in real time to ensure that the blockage is cleared promptly. The processing device includes a filling pump; the filling pump is connected to the PC and PLC of the external circuit system to form a chain control. When the pipeline is blocked, the pipe blockage monitoring device feeds back the blockage signal to the PC, which controls the PLC to regulate the filling pump and clear the blocked pipe by increasing the pumping flow rate. The pipe blockage monitoring mechanism has a magnetic powder box and a pressure sensor inside its housing. The pressure sensor is placed inside the housing and connected to the magnetic powder box via a spring and to the microcontroller via a wire. The magnetic powder box contains magnetic powder, and by monitoring the reading of the pressure sensor, it is determined whether the pipe is blocked. When the pipeline is blocked, the concentration of iron powder at the blocked area increases, and the magnetic attraction force generated is greater than the gravity of the magnetic powder itself. The magnetic powder will be sucked up, and the pressure sensor will monitor the weight of the magnetic powder in the magnetic powder box in real time.

2. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The pipe blockage monitoring mechanism is a rectangular parallelepiped structure and is set under the monitoring pipe through a hook; the main material of the magnetic powder is Fe3O4.

3. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The external circuit system includes a power supply, a single-chip microcomputer, a PC and a PLC. The single-chip microcomputer monitors the data of the pressure sensor in real time. When the data of the pressure sensor is detected to be less than the judgment value, the data is transmitted to the PC. The PC integrates and processes the data and edits the control instructions and transmits them to the PLC. The PLC controls the filling pump to increase the pumping flow to deal with pipe blockage. The power supply provides power supply for the single-chip microcomputer, PC and PLC.

4. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The monitoring pipeline is a pump-type filling pipeline for long-distance horizontal linear transportation; the pump-type filling pipeline for long-distance horizontal linear transportation is taken as the research object, and a pipe blockage monitoring mechanism is set at the bottom of this part of the pipeline, which is the monitoring pipeline described in this device; each section of the monitoring pipeline is 20 meters long and 2 centimeters thick, and the magnetic powder box of the pipe blockage monitoring mechanism is installed in the lower middle position of the pipeline, and a monitoring mechanism is installed on each section of the pipeline.

5. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 4, characterized in that: Two pipe hooks are set at the bottom of the monitoring pipe, and there are two external fixing rings on the top of the monitoring mechanism shell. The pipe hooks are connected to the external fixing rings to hook the monitoring mechanism shell and hang the monitoring mechanism under the pipe. The size of the external fixing ring is a semicircular ring with a diameter of 1 cm.

6. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 5, characterized in that: There are two top plate hooks on the top inner side of the monitoring mechanism housing, and two inner fixing rings are designed above the top plate of the magnetic powder box. The top plate hooks are connected to the inner fixing rings so that the top plate of the magnetic powder box is suspended above the monitoring mechanism housing without contacting the magnetic powder box, ensuring the accuracy of the pressure sensor reading. The size of the inner fixing ring is a semicircular ring with a diameter of 1 cm.

7. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The total mass of magnetic powder in the magnetic powder box is m 0磁重 , the monitoring reading of the pressure sensor is m 磁重 ,when When the pressure sensor is pressed against the pipe, it indicates that the pipe is blocked and the pressure sensor will send a signal in real time. According to the design size of the pipe, the proportion of magnetite sand added is 30%-40%. When the filling operation is normal, the magnetic attraction of the pipe is 0.08N-0.12N, and when the pipe is blocked, it is 0.15N-0.4N. Therefore, when the pipe is blocked, about half of the magnetic powder is sucked up to determine that the pipe is blocked. According to the requirements of conveying slurry, the proportion of magnetite sand added and the amount of magnetic powder in the magnetic powder box can be adjusted according to different working conditions to ensure that the magnetic attraction generated by the accumulation of magnetic materials when the pipe is blocked is greater than half of the total weight of the magnetic powder.

8. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The magnetic powder box used in the pipe blockage monitoring mechanism is made of acrylic material, and the design size of the magnetic powder box is 200mm×150mm×100mm, which prevents the magnetic powder from falling out of the range of the pressure sensor and causing weighing errors, thereby ensuring the accuracy of the monitoring results; the shell of the pipe blockage monitoring mechanism is made of acrylic material, and the design size of the monitoring mechanism shell is 400mm×300mm×200mm. It is connected to the pipeline through two pipe hooks to fix the magnetic powder box and the pressure sensor, preventing the magnetic powder judgment device from shifting and affecting the monitoring, thereby ensuring the accuracy of the monitoring results.

9. The device for monitoring and treating filling pipe blockage based on magnetic principle according to claim 1, characterized in that: The filling pump for handling pipe blockage uses a single motor or multiple motors. The motor power needs to meet the working conditions. That is, when working normally, the filling pump pumping flow rate is 80m 3 / h-180m 3 / h, at this time the outlet pressure is 7MPa-16MPa; when the pipeline is blocked, the monitoring device will feed back the blocking signal to the PC computer, and the PC computer will control the PLC to increase the pipeline pumping flow to the maximum output value of 150m 3 / h-200m 3 / h, to solve the pipe blockage.

10. A method for monitoring and treating filling pipe blockage based on magnetic principle, using the device for monitoring and treating filling pipe blockage based on magnetic principle according to any one of claims 1 to 9, characterized in that The following steps are involved: (1) Connect the power supply to the pressure sensor, single-chip microcomputer, PC computer, and PLC respectively to provide them with power supply guarantee; the pipeline monitoring mechanism is installed under the monitoring pipeline, and the pressure sensor, single-chip microcomputer, PC computer and PLC are connected in sequence. Each component is connected in series through a wire to transmit the signal; (2) The pipe blockage monitoring mechanism realizes real-time monitoring of the pipeline through the weighing of the pressure sensor. The pressure sensor transmits the monitored data to the single-chip microcomputer, and the single-chip microcomputer transmits the processed data to the PC. The PC judges the signal from the single-chip microcomputer and sends control instructions to the PLC to realize the control of the filling pump flow; (3) Use pipeline monitoring mechanism to judge the blockage of pipeline; when pipeline is blocked, the concentration of iron powder at the blockage increases, and the magnetic attraction force generated is greater than the gravity of magnetic powder itself, magnetic powder will be sucked up, and pressure sensor will monitor the weight of magnetic powder in magnetic powder box in real time; when When the mass of magnetic powder in the magnetic powder box is sucked up, it is greater than This means that at least half of the magnetic powder in the magnetic powder box has been sucked up, and the pipeline is considered to be blocked; (4) When the pipeline is detected to be blocked, the PLC controls the filling pump to increase the pumping flow rate to the maximum output value of 150m 3 / h-200m 3 / h, as the flow rate increases, the conveying pressure in the pipe gradually increases, and the slurry accumulated at the bottom of the pipe flows again. The magnetic material at the pipe blockage gradually decreases, the magnetic attraction gradually decreases, and the magnetic powder gradually falls. That is, when When the magnetic powder box is filled with more than half of the magnetic powder, it is determined that the pipeline blockage problem has been solved. At this time, the signal is sent to the PC computer, and the filling pump is controlled by the PLC to adjust the pumping flow back to the normal value of 80m 3 / h-180m 3 / h; the device realizes signal transmission and pumping flow control through an external circuit system; (5) After the pumping flow returns to normal, the monitoring and treatment of filling pipe blockage is completed; the pressure sensor will continuously monitor the weight of the magnetic powder in the magnetic powder box in real time, and transmit the measured data to the external circuit system in real time, realizing closed-loop control of filling pipe blockage monitoring and treatment.

Images