A material blocking prevention device and method for a rolling mill dust removal screw conveyor

Abstract

This application provides a dust removal anti-clogging device and method for a screw conveyor in a rolling mill. The device includes: a screw conveyor body connected to an ash silo and a compressed air source; several sets of purging branches located at the bottom of the ash silo, with the inlet end of each purging branch connected to the compressed air source and the outlet end located inside the ash silo; and a PLC timing control module connected to the purging branches and a drive mechanism, the drive mechanism being used to open or close the screw conveyor body. The PLC timing control module is configured to: open the screw conveyor body using the drive mechanism according to a preset time, and control the screw conveyor body to run according to a preset running time; after the screw conveyor body is opened, open the purging branches in a preset sequence, thereby solving the problem that current pressure regulation mechanisms for screw conveyor purging systems cannot address the issue of ash residue remaining in the ash silo due to insufficient purging pressure.

Description

Technical Field

[0001] This application relates to the field of equipment technology in the steel industry, and in particular to a dust removal screw conveyor anti-clogging device and method for a rolling mill. Background Technology

[0002] In the context of the steel industry's trend towards ultra-low emissions and high-quality development, the dust removal system of the rolling mill, as a core component for controlling dust pollution and ensuring compliance with production environmental standards, directly impacts the company's environmental compliance and production continuity. The screw conveyor, a key unloading device in the dust removal system, is responsible for transferring dust from the collection device to the storage silo. Its stability is influenced by both the physical properties of the dust (such as its hygroscopicity and strong adhesion) and process conditions (such as intermittent unloading and fluctuations in purging pressure). In actual production, dust easily clumps within the screw conveyor due to moisture absorption. Combined with factors such as delayed manual unloading response and insufficient purging system pressure, this leads to frequent material blockages in the screw conveyor, causing unplanned equipment shutdowns. A single blockage requires disassembling the screw shaft and casing for manual cleaning, taking over 8 hours. This not only interrupts production but also poses a risk of environmental violations due to secondary dust emissions.

[0003] Currently, to address the problem of material blockage in screw conveyors, optimization of shaft end seal design reduces dust leakage, but the pressure regulation mechanism of the purging system is not addressed, failing to resolve the issue of residual ash due to insufficient purging pressure. Another approach involves a passive unblocking structure using elastic cleaning strips on the screw blade surface, utilizing the friction of rotating blades to break up hardened ash blocks. However, this method relies on the contact probability between the ash blocks and the cleaning strips, limiting its effectiveness in clearing already formed stubborn hardened layers. A third approach involves installing pressure sensors at the screw conveyor outlet to construct a blockage early warning system, but this only provides a passive alarm after blockage occurs, lacking proactive intervention in the ash flow state and failing to prevent blockage from occurring at its source. Summary of the Invention

[0004] This application provides a device and method for preventing material blockage in a screw conveyor for dust removal in a rolling mill, in order to solve the technical problem that the current pressure regulation mechanism of the blowing system for screw conveyors cannot solve the problem of ash residue remaining in the ash silo due to insufficient blowing pressure.

[0005] The first aspect of this application provides an anti-clogging device for a mill dust removal screw conveyor, comprising: A screw conveyor body is connected to an ash silo and a compressed air source; the screw conveyor body is used to transport dust into the ash silo. Several sets of purging branches are provided, the purging branches are located at the bottom of the ash silo, the air inlet of the purging branches is connected to the compressed air source, and the air outlet of the purging branches is located inside the ash silo. A PLC timing control module is connected to the purging branch and the drive mechanism, which is connected to the screw conveyor body. The drive mechanism is used to turn the screw conveyor body on or off. The PLC timing control module is configured as follows: The screw conveyor body is started by the drive mechanism according to a preset time, and the screw conveyor body is controlled to run according to the preset running time. When the screw conveyor body is turned on, the purging branch is turned on in a preset sequence according to a preset timing.

[0006] In some embodiments, the purging branch includes: Several pneumatic ball valves and corresponding connected solenoid pulse valves; The PLC timing control module is further configured as follows: The pneumatic ball valve and the electromagnetic pulse valve are opened simultaneously in a preset sequence according to a pre-defined timing. When the pneumatic ball valve is closed, it disconnects the air path from the compressed air source.

[0007] In some embodiments, the PLC timing control module is further configured to: When the screw conveyor body is turned on, one of the purging branches is turned on in a preset sequence according to a set time, and the other purging branches are turned off.

[0008] In some embodiments, the PLC timing control module is further configured to: Obtain dust emission levels; The preset operating time is adjusted according to the dust emission amount.

[0009] In some embodiments, the apparatus further includes: An operation detection unit, connected to the screw conveyor body, is configured to: Obtain the torque value of the screw conveyor body; If the torque value is greater than the preset torque rating, the audible and visual alarm device is activated and the screw conveyor body is shut down using the drive mechanism.

[0010] In some embodiments, the operation detection unit is connected to the drive mechanism, and the operation detection unit is further configured to: Obtain the output current value of the drive mechanism; If the output current value is greater than the preset current rating, the audible and visual alarm device is activated and the screw conveyor body is shut down using the drive mechanism.

[0011] In some embodiments, the apparatus further includes: A pressure monitoring unit is installed on the air path pipeline of the compressed air source, and the pressure monitoring unit is configured to: Obtain the gas source pressure value of the gas pipeline; If the gas source pressure value is not within the preset pressure range, the audible and visual alarm device will be activated.

[0012] In some embodiments, the apparatus further includes: The running status indicator light is provided with a first color bit, a second color bit, and a third color bit; When the status indicator light is lit in the first color, both the compressed air source and the screw conveyor body are operating normally. When the status indicator light is lit in the second color, the screw conveyor body is in the state of adjusting the preset running time; When the status indicator light is lit in the third color, the torque value of the screw conveyor body is greater than the preset torque rating value, or the output current value of the drive mechanism is greater than the preset current rating value, or the air source pressure value of the air pipeline is not within the preset pressure range.

[0013] In some embodiments, the apparatus further includes: A communication unit is connected to the operation detection unit and the pressure monitoring unit. When the audible and visual alarm device is activated, it sends a warning message to a designated electronic device. The warning message includes: the torque value of the screw conveyor body is greater than a preset torque rating value, or the output current value of the drive mechanism is greater than a preset current rating value, or the air source pressure value of the air pipeline is not within a preset pressure range. The designated electronic device is an electronic device capable of receiving electronic information.

[0014] The second aspect of this application provides a method for preventing material blockage in a mill dust collector screw conveyor, applied to the anti-blocking device for a mill dust collector screw conveyor as described in any one of the first aspects above, comprising: The screw conveyor body is started by the drive mechanism according to the preset time, and the screw conveyor body is controlled to run according to the preset running time. When the screw conveyor body is turned on, one of the purging branches is turned on in a preset sequence according to a pre-set time, and the other purging branches are turned off.

[0015] This application provides a dust removal screw conveyor anti-clogging device and method for a rolling mill, the device comprising: a screw conveyor body connected to an ash silo and a compressed air source; the screw conveyor body being used to convey dust into the ash silo; a plurality of purging branches disposed at the bottom of the ash silo, the inlet end of each purging branch connected to the compressed air source, and the outlet end of each purging branch disposed within the ash silo; a PLC timing control module connected to the purging branches and a drive mechanism, the drive mechanism being connected to... Connected to the screw conveyor body, the drive mechanism is used to open or close the screw conveyor body; the PLC timing control module is configured to: open the screw conveyor body using the drive mechanism according to a preset time, and control the screw conveyor body to run according to a preset running time; when the screw conveyor body is opened, the purging branch is opened in a preset sequence according to a preset timing sequence, so as to realize the independent control of multiple purging branches and the sequential purging strategy, avoid the problem of sudden pressure drop in the purging branch caused by multiple simultaneous openings, thereby significantly improving the dust removal efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the anti-clogging device for the dust removal screw conveyor in the rolling mill in this application; Figure 2 This is a flowchart illustrating the operation of the PLC timing control module in this application. Figure 3 This is a flowchart of the operation of the detection unit in this application. Figure 4 This is a flowchart illustrating the operation of the pressure monitoring unit in this application.

[0018] Explanation of reference numerals in the attached figures: 1-Screw conveyor body; 11-Drive mechanism; 2-Ash hopper; 3-Compressed air source; 4-Purge branch; 41-Pneumatic ball valve; 42-Solenoid pulse valve; 5-PLC timing control module; 6-Operation detection unit; 7-Audible and visual alarm device; 8-Pressure monitoring unit; 9-Operation status indicator light; 10-Communication unit. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0020] Because some technologies fail to address the issue of insufficient ash pressure leading to ash residue in the ash bin due to purging system pressure in screw conveyors, this application provides an anti-clogging device and method for a rolling mill dust removal screw conveyor. The anti-clogging device and method for a rolling mill dust removal screw conveyor are described below: like Figure 1 The diagram shown is a structural schematic of the anti-clogging device for the mill dust removal screw conveyor in this application.

[0021] The first aspect of this application provides an anti-clogging device for a mill dust removal screw conveyor, comprising: The screw conveyor body 1 is connected to the ash silo 2 and the compressed air source 3; the screw conveyor body 1 is used to transport dust into the ash silo 2; the compressed air source 3 is used to provide power to the screw conveyor body 1.

[0022] Several sets of purging branches 4 are provided at the bottom of the ash silo 2. The air inlet of the purging branch 4 is connected to the compressed air source 3, and the air outlet of the purging branch 4 is located inside the ash silo 2. Each set of purging branches 4 is composed of a DN50 pneumatic ball valve 41 and a set of parallel electromagnetic pulse valves 42 connected in series. Each set of purging branches is arranged in different areas at the bottom of the ash silo 2. Their air outlets are connected to the interior of the ash silo 2, and their air inlets are all connected to the compressed air source 3.

[0023] like Figure 2 The diagram shown is a flowchart of the PLC timing control module 5 during operation in this application.

[0024] The PLC timing control module 5 is connected to the purging branch 4 and the drive mechanism 11. The drive mechanism 11 is connected to the screw conveyor body 1 and is used to turn the screw conveyor body 1 on or off. The PLC timing control module 5 is configured as follows: The screw conveyor body 1 is activated by the drive mechanism 11 according to a preset time, and the screw conveyor body 1 is controlled to run according to the preset running time; after the screw conveyor body 1 is activated, the purging branch 4 is activated in a preset sequence according to a preset time sequence.

[0025] Specifically, the purging branch 4 includes: Several pneumatic ball valves 41 and corresponding electromagnetic pulse valves 42 are provided; the pneumatic ball valves 41 are used for overall control of opening and closing, and when the pneumatic ball valves 41 are closed, the pneumatic ball valves 41 disconnect the air path connection with the compressed air source 3; the electromagnetic pulse valves 42 are used for high-frequency pulse purging.

[0026] The PLC timing control module 5 is further configured as follows: The pneumatic ball valve 41 and the electromagnetic pulse valve 42 are opened simultaneously in a preset sequence.

[0027] Specifically, the PLC timing control module 5 controls the synchronous opening and closing of each DN50 pneumatic ball valve 41 and its corresponding electromagnetic pulse valve 42 through intermediate relays, and starts each purging branch in sequence according to a preset timing sequence. Only one branch is opened for purging at a time, while the other branches remain closed to maintain the pressure of the energy storage tank and ensure that the single-circuit purging obtains the maximum impact force. After the DN50 pneumatic ball valve 41 is installed, the connection with the compressed air source 3 is cut off when purging is not in progress, preventing internal leakage of the electromagnetic pulse valve 42 and saving compressed air consumption.

[0028] In this embodiment, the PLC timing control module 5 is further configured as follows: When the screw conveyor body 1 is turned on, one of the purging branches 4 is turned on in a preset sequence according to a preset timing, and the other purging branches 4 are turned off.

[0029] For example, if there are four sets of purging branches 4, the purging sequence is as follows: first set of purging branches 4 → second set of purging branches 4 → third set of purging branches 4 → fourth set of purging branches 4, cycling in a 5-second interval between each set of purging branches 4. The drive mechanism 11 is started and runs for 10 minutes every 2 hours. An alarm is triggered when the current or torque exceeds 1.2 times the rated value. During operation, the PLC timing control module 5 starts each purging branch sequentially according to preset logic, with only one branch working at a time to ensure sufficient purging pressure. At the same time, the screw conveyor body 1 is started periodically for automatic unloading. When the operation detection unit 6 detects an abnormal load (current or torque exceeding 1.2 times the rated value), the audible and visual alarm device 7 immediately alarms and suspends unloading. It can only be restarted after manual troubleshooting and reset to ensure safe operation.

[0030] In this embodiment, the PLC timing control module 5 is further configured as follows: The dust emission amount is obtained through a dust emission sensor installed at the dust emission monitoring interface.

[0031] The preset operating time is adjusted according to the dust emission level. The preset operating time ranges from 5 minutes to 15 minutes.

[0032] Specifically, the PLC timing control module 5 is also electrically connected to the drive mechanism 11. The control logic is to start the drive mechanism 11 every 1 to 3 hours for 5 to 15 minutes. The specific parameters (preset running time) can be dynamically adjusted according to the real-time data (dust emission) from the dust emission monitoring interface. The preset running time is proportional to the dust emission.

[0033] like Figure 3 The diagram shown is a flowchart of the operation of the detection unit 6 in this application.

[0034] In this embodiment, the device further includes: Operation detection unit 6, which is connected to the screw conveyor body 1, is configured as follows: Obtain the torque value of the screw conveyor body 1; the torque value of the screw conveyor body 1 refers to the rotational torque provided by its drive device to overcome the material conveying resistance. This value is determined by the equipment design parameters (such as screw diameter, screw pitch, and rotational speed) and material characteristics (such as density and friction coefficient), and is a core indicator for evaluating conveying capacity, drive power matching, and equipment stability.

[0035] If the torque value is greater than the preset torque rating, the audible and visual alarm device 7 is activated and the screw conveyor body 1 is shut down using the drive mechanism 11.

[0036] For example, when the torque value exceeds the preset torque rating, the stress on the helical bearing of the screw conveyor body 1 may exceed the material yield strength, causing the shaft to bend or even break. For instance, when conveying high-density materials (such as ore), if the torque exceeds the rated value by more than 30%, the shaft may suddenly break due to fatigue accumulation. It may also cause blade deformation, weld cracking, or bolt loosening in the screw conveyor body 1. For example, in the conveying of wet cement, the blades may twist due to excessive torque, leading to material accumulation and blockage.

[0037] For example, when the torque value exceeds the preset torque rating, the clearance between the screw shaft and the bearing of the screw conveyor body 1 may increase due to dynamic load, leading to increased operating vibration. For instance, when conveying viscous materials (such as sludge), sudden torque changes may cause the entire machine to resonate, with noise levels exceeding 85 dB(A). It may also cause changes in the coefficient of friction between the screw blades and the material, leading to material slippage or accumulation. For example, under inclined conveying conditions, insufficient torque may cause material backflow, while overload may cause material blockage at the outlet. In summary, by detecting the torque value of the screw conveyor body 1 and by prompting personnel to inspect the anti-blocking device via the audible and visual alarm device 7, the system can effectively prevent material blockage.

[0038] In the improved example, the operation detection unit 6 is connected to the drive mechanism 11, and the operation detection unit 6 is further configured to: Obtain the output current value of the drive mechanism 11; if the output current value is greater than the preset current rating, activate the audible and visual alarm device 7 and use the drive mechanism 11 to shut down the screw conveyor body 1.

[0039] For example, when the output current value exceeds the preset current rating, it will cause the motor windings of the drive mechanism 11 to overheat, exceeding the design limit (e.g., for a motor with insulation class F, the maximum allowable temperature is 155°C). Prolonged overload will accelerate insulation aging and may even cause the motor to burn out. Increased current is usually accompanied by torque overload (the increase in current directly leads to an increase in power and torque). Overload torque can cause the screw shaft to bend or break. In summary, by detecting the output current value of the drive mechanism 11 and by using the audible and visual alarm device 7 to prompt personnel to inspect the anti-blocking device.

[0040] Specifically, the operation detection unit 6 includes a current sensor and a torque sensor; wherein, the current sensor is connected in series in the power supply circuit of the drive mechanism 11, and the torque sensor is installed at the end of the screw shaft of the screw conveyor body 1; when the detected value exceeds 1.2 times the rated value, the PLC timing control module 5 triggers the audible and visual alarm device 7 and suspends the unloading operation, that is, shuts down the screw conveyor body 1 and each group of purging branches 4.

[0041] like Figure 4 The diagram shown is a flowchart of the operation of the pressure monitoring unit 8 in this application.

[0042] In this embodiment, the device further includes: Pressure monitoring unit 8, wherein the pressure monitoring unit 8 is disposed on the air passage of the compressed air source 3, and the pressure monitoring unit 8 is configured as follows: The gas source pressure value of the gas pipeline is obtained; if the gas source pressure value is not within the preset pressure range, the audible and visual alarm device 7 is activated. The preset pressure range is 0.4 MPa to 0.6 MPa.

[0043] For example, when the air source pressure is not within the preset pressure range, the pneumatic ball valve 41, clutch, and other components of the screw conveyor body 1 rely on compressed air for operation. If the pressure is too low (e.g., <0.4 MPa), the cylinder thrust is insufficient, causing the valve to fail to open or close completely, leading to material leakage or blockage. High pressure (e.g., >1.2 MPa) may cause excessive compression of the cylinder seals, accelerating aging and leakage, and increasing maintenance frequency. Therefore, by keeping the compressed air source 3 operating within the preset pressure range, the above problems are avoided, and the sound and light alarm device 7 alerts the personnel.

[0044] In this embodiment, the device further includes: The running status indicator 9 is provided with a first color bit, a second color bit, and a third color bit.

[0045] When the status indicator light 9 is lit in the first color, both the compressed air source 3 and the screw conveyor body 1 are operating normally.

[0046] When the status indicator light 9 is lit in the second color, the screw conveyor body 1 is in the state of adjusting the preset running time.

[0047] When the status indicator light 9 is lit in the third color position, the torque value of the screw conveyor body 1 is greater than the preset torque rating value, or the output current value of the drive mechanism 11 is greater than the preset current rating value, or the air source pressure value of the air pipeline is not within the preset pressure range.

[0048] Specifically, the status indicator light 9 adopts a three-color design: a solid green light (corresponding to the first color position) indicates normal operation, a flashing yellow light (corresponding to the second color position) indicates that the parameters are being adjusted, and a solid red light (corresponding to the third color position) indicates that the equipment is malfunctioning.

[0049] In this embodiment, the device further includes: A communication unit 10 is connected to the operation detection unit 6 and the pressure monitoring unit 8. When the audible and visual alarm device 7 is activated, it sends a warning message to a designated electronic device. The warning message includes: the torque value of the screw conveyor body 1 is greater than a preset rated torque value, or the output current value of the drive mechanism 11 is greater than a preset rated current value, or the air source pressure value of the air pipeline is not within a preset pressure range. The designated electronic device is an electronic device capable of receiving electronic information. The communication unit 10 prevents users from being unable to immediately know the operating status of the anti-blocking device when they are not near it. The warning message allows staff to remotely monitor the anti-blocking device.

[0050] This application provides an anti-clogging device for a dust-removing screw conveyor in a rolling mill, which has the following advantages: Full-chain anti-blockage: Integrating a mechanism of "zoned and path-by-path purging, timed automatic unloading, multi-parameter real-time monitoring, and intelligent alarm" to suppress dust caking at the source and avoid long-term static dust accumulation.

[0051] Purging pressure guarantee: By using multi-channel independent control and sequential purging strategy, the pressure drop caused by multiple channels being turned on at the same time is avoided, which significantly improves the dust removal efficiency.

[0052] Highly adaptable to different operating conditions: the unloading cycle and purging frequency can be dynamically adjusted according to the amount of dust emissions.

[0053] Significant operational and maintenance benefits: In the application of the 4300 mm wide and thick plate production line, the continuous operating time of the equipment was increased from 15 days to more than 150 days, achieving zero material blockage failures and reducing maintenance costs by 80%; after the installation of the DN50 pneumatic ball valve 41, the air supply is cut off when not purging, preventing internal leakage of the electromagnetic pulse valve 42 and effectively saving compressed air consumption; the concentration of leaked dust emissions is stably controlled at ≤10mg / m³. 3 It is superior to the requirements of the "Emission Standard of Air Pollutants for Steel Rolling Industry" (GB 28665-2012).

[0054] The second aspect of this application provides a method for preventing material blockage in a mill dust collector screw conveyor, applied to an anti-blocking device for a mill dust collector screw conveyor as described in any of the above embodiments, comprising: The screw conveyor body is started by the drive mechanism according to the preset time, and the screw conveyor body is controlled to run according to the preset running time. When the screw conveyor body is turned on, one of the purging branches is turned on in a preset sequence according to a pre-set time, and the other purging branches are turned off.

[0055] It is worth noting that the effects of the above method embodiments can be found in the effects of the above system embodiments, and will not be repeated here.

[0056] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A dust removal screw conveyor anti-clogging device for a rolling mill, characterized in that, include: The screw conveyor body (1) is connected to the ash silo (2) and the compressed air source (3); the screw conveyor body (1) is used to transport dust into the ash silo (2); Several sets of purging branches (4) are provided at the bottom of the ash silo (2). The air inlet of the purging branch (4) is connected to the compressed air source (3), and the air outlet of the purging branch (4) is provided inside the ash silo (2). The PLC timing control module (5) is connected to the purging branch (4) and the drive mechanism (11). The drive mechanism (11) is connected to the screw conveyor body (1) and is used to turn the screw conveyor body (1) on or off. The PLC timing control module (5) is configured as follows: The screw conveyor body (1) is started by the drive mechanism (11) according to the preset time, and the screw conveyor body (1) is controlled to run according to the preset running time. When the screw conveyor body (1) is turned on, the purging branch (4) is turned on in a preset sequence according to the preset timing.

2. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 1, characterized in that, The purging branch (4) includes: Several pneumatic ball valves (41) and corresponding electromagnetic pulse valves (42); The PLC timing control module (5) is further configured as follows: The pneumatic ball valve (41) and the electromagnetic pulse valve (42) are opened simultaneously in a preset sequence according to a preset timing. When the pneumatic ball valve (41) is closed, the pneumatic ball valve (41) cuts off the air path connection with the compressed air source (3).

3. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 1, characterized in that, The PLC timing control module (5) is further configured as follows: When the screw conveyor body (1) is turned on, one of the purge branches (4) is turned on in a preset sequence and the other purge branches (4) are turned off.

4. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 1, characterized in that, The PLC timing control module (5) is also configured as follows: Obtain dust emission levels; The preset operating time is adjusted according to the dust emission amount.

5. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 4, characterized in that, The device further includes: A running detection unit (6) is connected to the screw conveyor body (1), and the running detection unit (6) is configured as follows: Obtain the torque value of the screw conveyor body (1); If the torque value is greater than the preset torque rating, the audible and visual alarm device (7) is activated and the screw conveyor body (1) is closed using the drive mechanism (11).

6. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 5, characterized in that, The operation detection unit (6) is connected to the drive mechanism (11), and the operation detection unit (6) is further configured to: Obtain the output current value of the drive mechanism (11); If the output current value is greater than the preset current rating, the audible and visual alarm device (7) is activated and the screw conveyor body (1) is closed using the drive mechanism (11).

7. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 6, characterized in that, The device further includes: A pressure monitoring unit (8) is installed on the air duct of the compressed air source (3), and the pressure monitoring unit (8) is configured as follows: Obtain the gas source pressure value of the gas pipeline; If the gas source pressure value is not within the preset pressure range, the audible and visual alarm device (7) will be activated.

8. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 7, characterized in that, The device further includes: The running status indicator (9) is provided with a first color bit, a second color bit, and a third color bit; When the status indicator (9) is lit in the first color, the compressed air source (3) and the screw conveyor body (1) are both operating normally; When the status indicator (9) is lit in the second color, the screw conveyor body (1) is in the state of adjusting the preset running time; When the status indicator (9) lights up in the third color, the torque value of the screw conveyor body (1) is greater than the preset torque rating value, or the output current value of the drive mechanism (11) is greater than the preset current rating value, or the air source pressure value of the air pipeline is not within the preset pressure range.

9. The anti-clogging device for a rolling mill dust removal screw conveyor according to claim 7, characterized in that, The device further includes: The communication unit (10) is connected to the operation detection unit (6) and the pressure monitoring unit (8). When the audible and visual alarm device (7) is turned on, it sends a warning message to the setting electronic device. The warning message includes: the torque value of the screw conveyor body (1) is greater than the preset torque rating value, or the output current value of the drive mechanism (11) is greater than the preset current rating value, or the air source pressure value of the air pipeline is not within the preset pressure range. The setting electronic device is an electronic device that can receive electronic information.

10. A method for preventing material blockage in a rolling mill dust collector screw conveyor, applied to the anti-blocking device for a rolling mill dust collector screw conveyor as described in any one of claims 1 to 9, characterized in that, include: The screw conveyor body is started by the drive mechanism according to the preset time, and the screw conveyor body is controlled to run according to the preset running time. When the screw conveyor body is turned on, one of the purging branches is turned on in a preset sequence according to a pre-set time, and the other purging branches are turned off.

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