Desulfurization cover fault detection method and system

Abstract

The invention discloses a desulfurization cover fault detection method and system, relates to the technical field of metallurgy, and aims to reduce the fault processing time and improve the working efficiency of a desulfurization cover. The desulfurization cover fault detection method comprises the following steps: detecting the resistance of one or N desulfurization cover lifting motors through a resistance detection device to obtain resistance detection data and sending the resistance detection data to an analysis device; acquiring state data of control devices of the N desulfurization cover lifting motors; the analysis device analyzes the resistance detection data and the state data to obtain the lifting state information of the N desulfurization cover lifting motors and the operation state information of the control device, and the analysis device analyzes the resistance detection data and the state data according to the lifting state information of the N desulfurization cover lifting motors and the corresponding operation state information of the control device; analyzing to obtain whether the control device has the condition of a standby control device; and under the condition that the control device is used as a standby control device, the control device is controlled to be switched into the standby control device according to the numbering sequence, and the desulfurization cover lifting motor is controlled to operate.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and in particular to a desulfurization hood fault detection method and system. Background Art

[0002] Currently, large amounts of dust generated during metallurgical processes are removed through desulfurization hoods using water. The operating status of the desulfurization hood control system is a key factor affecting hood utilization. However, existing desulfurization hood control systems have long troubleshooting times, which causes the troubleshooting process to take up production time and easily leads to low desulfurization hood operating efficiency. Summary of the Invention

[0003] The embodiments of the present application provide a desulfurization hood fault detection method and system, which can reduce the time for fault handling and improve the working efficiency of the desulfurization hood.

[0004] A first aspect of an embodiment of the present application provides a desulfurization hood fault detection method, comprising:

[0005] Detecting the resistance of one or N desulfurization hood lifting motors by a resistance detection device to obtain resistance detection data, wherein the resistance detection data includes a resistance detection value or the sum of N resistance detection values, where N is a natural number greater than 1, and sending the resistance detection data to an analysis device;

[0006] Acquiring status data of control devices of N desulfurization hood lifting motors;

[0007] By means of the analyzing device, the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device are analyzed based on the resistance detection data and the state data;

[0008] By means of the analyzing device, based on the lifting state information of the N desulfurization hood lifting motors and the corresponding operating state information of the control device, it is analyzed whether the control device has the conditions to serve as a backup control device;

[0009] Under the condition that the control device has the function of serving as a backup control device, the control device is controlled to switch to the backup control device in the order of numbers, and the desulfurization hood lifting motor is controlled to operate, wherein the analysis device sequentially numbers the N desulfurization hood lifting motors and the corresponding control devices.

[0010] In some embodiments, the one resistance detection device detects the resistance of one or N desulfurization hood lifting motors to obtain a resistance detection value or the sum of N resistance detection values, including:

[0011] When the resistance of the lifting motor is detected by the resistance detection device, a resistance value of the lifting motor is obtained, wherein the resistance value of the lifting motor is represented by R; or

[0012] When the detection device detects N lift motor resistors, the sum of the resistance values ​​of the N lift motors is obtained, wherein the sum of the resistance values ​​of the N lift motors is expressed as r, where r=R / N.

[0013] In some embodiments, the analyzing device obtains information of the N desulfurization hood lifting motors and information of the control device based on status data of the N desulfurization hood lifting motors, and the method further includes:

[0014] Acquire status data of the control devices of N desulfurization hood lifting motors, wherein the status data includes: start status data, stop status data, operation status data, and fault status data of the lifting motors, wherein the status data is detected and displayed by the control device and sent to the analysis device;

[0015] Acquiring lifting state information of the desulfurization hood lifting motor, wherein the lifting state information includes: normal lifting state information of the lifting motor and abnormal lifting state information of the lifting motor;

[0016] Acquire status information of the control device, wherein the status information includes: a normal state of the control device and an abnormal state of the control device.

[0017] In some embodiments, the analyzing device analyzes and obtains the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device based on the resistance detection data and the state data, including:

[0018] If the resistance detection value detected by the resistance detection device is within the first preset fluctuation range, it is determined that one of the lifting motors is normal; otherwise, it is determined that the currently detected one of the lifting motors is abnormal;

[0019] If the control device corresponding to the currently normal lifting motor is in the running state, the starting state or the stopping state, then it is determined that the control device corresponding to the normal lifting motor is normal; or,

[0020] If the control device corresponding to the currently normal lifting motor is in a fault state, it is determined that the control device corresponding to the normal lifting motor is abnormal; or

[0021] If the control device corresponding to one of the lifting motors that is currently abnormal is in a fault state, and if the control device corresponding to the abnormal lifting motor is reset from the fault state to the stop state by the analysis device within a preset time, then the corresponding control device is judged to be normal; otherwise, the corresponding control device is judged to be abnormal.

[0022] In some embodiments, the analyzing device analyzes and obtains the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device based on the resistance detection data and the state data, including:

[0023] If the sum of the N resistance detection values ​​detected by the resistance detection device is within the second preset fluctuation range, it is determined that the N lifting motors are normal; otherwise, it is determined that at least one of the N lifting motors detected by the resistance detection device is abnormal;

[0024] If the control devices corresponding to the N normal lifting motors are in a running state, a starting state or a stopping state, then it is determined that the control devices corresponding to the N normal lifting motors are normal; or,

[0025] If the control devices corresponding to the N lifting motors that are currently in normal state are in a fault state, then it is determined that the control devices corresponding to the N lifting motors that are currently in normal state are abnormal; or

[0026] If the sum of N resistance detection values ​​detected by the resistance detection device is not within the second preset fluctuation range, the analysis device disconnects the abnormal lifting motor from the resistance detection device in ascending order according to the number. If the sum of the resistance detection values ​​is within the third preset fluctuation range, it is determined that the resistance of the lifting motor with the last disconnection is abnormal. If the control device corresponding to the abnormal lifting motor is reset from a fault state to a stopped state by the analysis device within a preset time, it is determined that the corresponding control device is normal. Otherwise, it is determined that the corresponding control device is abnormal.

[0027] or;

[0028] If at least one of the N lifting motors detected by the resistance detection device is abnormal, the analysis device disconnects the lifting motor corresponding to the normal control device from the resistance detection device. At this time, if the sum of the resistance detection values ​​is within the fourth preset fluctuation range, the analysis device disconnects the lifting motor corresponding to the abnormal control device from the resistance detection device one by one according to the number, in ascending order, until the sum of the resistance detection values ​​is within the fifth preset fluctuation range. It is then judged that the resistance of the lifting motor with the last disconnection number is abnormal. If the control device corresponding to the abnormal lifting motor is reset from a fault state to a stopped state by the analysis device within a preset time, it is judged that the corresponding control device is normal. Otherwise, it is judged that the corresponding control device is abnormal.

[0029] In some embodiments, under the condition that the control device is capable of serving as a backup control device, the control device is controlled to switch to the backup control device in a numbered order and control the desulfurization hood lifting motor to operate, wherein the analysis device sequentially numbers the N desulfurization hood lifting motors, including:

[0030] Analyzing normal status information of the control device, including: a stopped state, an operating state, and a started state; when the control device is in the stopped state and the desulfurization hood is in the upper limit position or the lower limit position, determining that the control device is qualified to serve as the backup control device;

[0031] If the current control device is qualified to serve as the backup control device, then when an abnormality occurs in any of the desulfurization hood lifting motors other than the current control device, the analysis device controls the switching relay so that the backup control device is connected to the lifting motor corresponding to the abnormal control device, and the lifting motor maintains the lifting action before the abnormality occurs. When the lifting motor reaches the target position, the lifting of the lifting motor is stopped, and the analysis device controls the switching relay so that the backup control device is connected to the lifting motor before the switching.

[0032] When the analyzing device controls the switching relay and the corresponding backup control device, the backup control device with a smaller number is preferentially selected.

[0033] In some embodiments, the control device can automatically reset from a fault state to a stopped state within a preset time, and the detection method further includes:

[0034] The analyzing device detects that the control device is in a fault state, and the analyzing device sends a fault reset command to the control device within a preset time to switch the control device from the fault state to a stopped state; or

[0035] If the control device receives the fault reset command from the analysis device and does not change from the fault state to the stop state within the preset time, the analysis device stops sending the fault reset command to the control device, and the control device remains in the fault state; or

[0036] If the control device receives a fault reset command from the analysis device and switches from a fault state to a stop state within a preset time, the analysis device stops sending the fault reset command to the control device, the control device remains in the stop state, and the control device waits for a start command or a run command from the analysis device.

[0037] A second aspect of the present application provides a desulfurization hood fault detection system. The desulfurization hood fault detection method described in the first aspect includes:

[0038] N desulfurization hoods, each of the N desulfurization hoods including N corresponding desulfurization hood lifting motors, wherein the number of each desulfurization hood corresponds to the number of each desulfurization hood lifting motor, and N is a natural number greater than 1;

[0039] a resistance detection device, one of the resistance detection devices being connected to each of the N desulfurization hood lifting motors, and configured to detect the resistance of one or the N desulfurization hood lifting motors to obtain resistance detection data, wherein the resistance detection data includes a resistance detection value or the sum of N resistance detection values;

[0040] A control device, each of which is connected one-to-one with the desulfurization hood lifting motor, and is used to control and detect the start, stop and operation of the desulfurization hood lifting motor. The control device is used to switch control and detect fault conditions of the desulfurization hood lifting motor and the control device;

[0041] The analyzing device is connected to the resistance detecting device and the control device respectively, and is used to analyze the received resistance detection data, the lifting state data and the fault state to perform switching control, lifting control and further fault analysis on the control device of the desulfurization hood;

[0042] a desulfurization hood relay, the desulfurization hood relay being arranged between the desulfurization hood lifting motor and the resistance detection device, and the desulfurization hood relay being used to disconnect the desulfurization hood lifting motor and the resistance detection device when powered;

[0043] A switching relay is connected to the analyzing device and is used to control the backup control device to switch with the abnormal control device corresponding to the lifting motor, wherein the number of the switching relays is the same as the number of the lifting motors connected in parallel.

[0044] In some embodiments, N desulfurization hood lifting motors are connected in parallel, the number of parallel lifting motors is greater than 1 and less than 4, wherein 2 to 3 motors form a group to form a desulfurization hood lifting motor switching circuit to ensure the switching control of the backup control device and the abnormal desulfurization hood lifting motor;

[0045] One of the resistance detection devices is connected in parallel with N of the desulfurization hood lifting motor switching circuits;

[0046] One of the analyzing devices is used to control the disconnection between different desulfurization hood lifting motors and the resistance detecting device to determine the desulfurization hood lifting motor with abnormal resistance;

[0047] One of the analysis devices is used to control different switching relays, control the backup control device to connect to the lifting motor corresponding to the abnormal control device, control the lifting action of the lifting motor, and switch back to the corresponding lifting motor control.

[0048] In some embodiments, the desulfurization hood fault detection system further comprises:

[0049] A lifting detection device is installed one-to-one with the desulfurization hood, and the lifting detection device is used to detect the lifting position signal of the desulfurization hood, wherein the lifting position includes an upper limit position and a lower limit position, the upper limit position corresponds to the rising target position of the desulfurization hood, and the lower limit position corresponds to the descending target position of the desulfurization hood.

[0050] The desulfurization hood fault detection method provided in the embodiment of the present application is provided with a resistance detection device connected to multiple desulfurization hood lifting motors, so that the resistance detection device performs one-to-one and one-to-many resistance detection on the resistance of the desulfurization hood lifting motors. By providing multiple lifting detection devices to detect the lifting status of multiple desulfurization hood lifting motors one-to-one, an analysis device is used to send detection and control instructions to the resistance detection device and the control device. The resistance detection device and the control device respectively perform fault detection and control on the multiple desulfurization hood motors and the multiple desulfurization hood lifting status according to the instructions, and send the resistance detection data and lifting status data to the analysis device. The analysis device analyzes the received lifting motor resistance detection data and lifting status data of the lifting motors, automatically troubleshoots the desulfurization hood fault, and can specifically troubleshoot the faulty desulfurization hood lifting motor and the faulty control device. It automatically switches the connection between the desulfurization hood standby control device and the corresponding lifting motor of the faulty control device, continues to control the desulfurization hood lifting, and uses the time for water spraying and dust suppression to handle the faulty part based on the fault analysis results. This greatly improves the working efficiency of the desulfurization hood and saves production time for fault handling. It also avoids the time spent on manual fault judgment and improves the automatic processing capability of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic flow chart of a desulfurization hood fault detection method provided in an embodiment of the present application;

[0052] Figure 2 A schematic structural diagram of a desulfurization hood fault detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0054] In this article, relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements limited by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "more than two" includes two or more than two situations.

[0055] Currently, desulfurization slag in metallurgical processes uses a water-pumping cooling process. The large amount of dust generated by the desulfurization slag is removed by pumping water through the desulfurization hood. When the desulfurization hood is at the upper limit, a crane lifts the desulfurization slag jar under the hood. The hood then begins to descend, driven by the hood's lifting motor. When the hood reaches the lower limit, it stops and begins pumping water for dust removal. After the hood is raised to the upper limit, the crane then lifts the desulfurization slag jar away. During the entire desulfurization hood pumping and dust removal process, the lifting control system drives the lifting motor to control the desulfurization hood's lifting action for a short time, while the water pumping and dust removal time is long. If a fault occurs during this short lifting action, it will directly affect the subsequent desulfurization hood pumping and dust removal and the lifting of the desulfurization slag jar. Therefore, quickly resolving and restoring the desulfurization hood lifting action is an important factor in improving the desulfurization hood's utilization rate. However, the existing desulfurization hood lifting control system has a long fault handling time and lacks the functions of automatically diagnosing faults, automatically recovering faults, and automatically resuming control of the desulfurization hood's lifting action. As a result, the fault handling process takes up production time, which can easily lead to low desulfurization hood operating efficiency. In view of this, embodiments of the present application provide a desulfurization hood fault detection system and method, which can reduce the time for fault handling and improve the working efficiency of the desulfurization hood.

[0056] In a first aspect of an embodiment of the present application, a desulfurization hood fault detection method is provided. Figure 1 This is a schematic flow chart of a desulfurization hood fault detection method provided in an embodiment of the present application. Figure 1 As shown, the desulfurization hood fault detection method includes:

[0057] S101: Detect the resistance of one or N desulfurization hood lifting motors through a resistance detection device to obtain resistance detection data, wherein the resistance detection data includes a resistance detection value or the sum of N resistance detection values, N is a natural number greater than 1, and send the resistance detection data to an analysis device.

[0058] Exemplarily, the desulfurization hood includes a hood body, a bearing seat, a water inlet pipe, an air duct, a self-locking device, a lifting motor and other spare parts. The desulfurization hood is equipped with a winch, which is driven by the desulfurization hood lifting motor. The winch can drive the desulfurization hood to flip, rise and fall. The hood body is equipped with a water spraying device for pumping water into the desulfurization slag tank and suppressing dust. The desulfurization hood control system includes N desulfurization hoods, a resistance detection device, a control device, an analysis device, a desulfurization hood relay and a switching relay. A resistance detection device is used to detect the resistance of the lifting motor. The control device is used to control and detect the start, stop and operation of the desulfurization hood lifting motor. The lifting detection device is used to detect the lifting position of the desulfurization hood. Among them, a resistance detection device is connected to N desulfurization hoods, the control device is connected one-to-one with the lifting motor of the desulfurization hood, and the analysis device is connected to the resistance detection device, the switching relay and the control device respectively. The desulfurization hood relay is located between the desulfurization hood lift motor and the resistance detection device. It is used to disconnect the desulfurization hood lift motor and the resistance detection device, allowing the resistance detection device to detect the resistance value of the lift motor one by one, thus realizing fault diagnosis of the desulfurization hood lift motor. The switching relay is used to switch the control device to control the desulfurization hood lift motor corresponding to the faulty control device.

[0059] For example, a resistance detection device can detect the resistance of one or N desulfurization hood lifting motors to obtain resistance detection data. The resistance detection device can then send the detected resistance detection data to an analysis device, which further analyzes the resistance detection data to detect faults in the desulfurization hood lifting motor. The resistance detection data can be the resistance detection value of a single desulfurization hood lifting motor or the sum of the resistance detection values ​​of N desulfurization hood lifting motors, where N is a natural number greater than 1.

[0060] S102: Acquire status data of control devices of N desulfurization hood lifting motors.

[0061] For example, the analysis device can obtain the status data of the control devices of N desulfurization hood lifting motors. The status data is detected and displayed by the control device and sent to the analysis device, including the start status data, stop status data, operation status data, and fault status data of the lifting motors.

[0062] S103: The analyzing device analyzes the resistance detection data and the status data to obtain the lifting status information of the N desulfurization hood lifting motors and the operating status information of the control device.

[0063] For example, the analysis device can analyze the N received resistance detection data and status data to obtain lifting status information of the N desulfurization hood lifting motors, where the lifting status information includes normal lifting status information and abnormal lifting status information of the lifting motors. The analysis device can also analyze the status data of the N control devices to obtain operating status information of the N control devices, where the operating status information includes normal status information and abnormal status information of the control devices.

[0064] S104: The analyzing device analyzes, based on the lifting status information of the N desulfurization hood lifting motors and the operating status information of the corresponding control devices, whether the control devices are qualified to serve as backup control devices.

[0065] For example, the analysis device analyzes whether the control device is qualified to serve as a backup control device based on the status information of the lifting motors of N desulfurization hoods obtained through analysis, that is, whether the resistance value of the lifting motor is within a preset range, and the status information of the control device such as operation, start or stop.

[0066] S105: Under the condition that the control device is capable of serving as a backup control device, the control device switches to the backup control device in the order of numbering, and controls the operation of the desulfurization hood lifting motor, wherein the analysis device sequentially numbers the N desulfurization hood lifting motors and the corresponding control devices.

[0067] For example, the sequential numbering is that the analyzing device numbers the desulfurization hood lifting motor and the control device from small to large, and the corresponding desulfurization hood lifting motor and the control device have the same number and are stored in the analyzing device.

[0068] For example, the desulfurization hoods can be numbered 1# to N#, and the corresponding control devices are also numbered 1# to N#, which correspond one to one and have the same corresponding numbers, making it easy to find faulty equipment. The control devices can be switched to backup control devices in sequence according to the desulfurization hood numbers 1# to N# to replace the faulty control device to continue controlling the operation of the corresponding desulfurization hood lifting motor.

[0069] For example, three control devices and corresponding lifting motors form a group, and the three control devices are numbered 2#, 4#, and 6# respectively. When 4# and 6# are qualified as backup control devices, the preferred order is the principle of increasing the number, and 2# control device is preferentially selected as the backup control device.

[0070] The desulfurization hood fault detection method provided in the embodiment of the present application is to set up a resistance detection device connected to N desulfurization hood lifting motors, so that the resistance detection device performs one-to-one individual detection and one-to-N detection on the resistance of the desulfurization hood lifting motor; by setting up N lifting detection devices to detect the lifting status of N desulfurization hoods one-to-one, an analysis device is used to directly receive the status data sent by the resistance detection device, the lifting detection device and the control device, and respectively perform fault detection and analysis on the status of the N desulfurization hood motors and the N desulfurization hood lifting control devices, and send instructions to the desulfurization hood relay to automatically troubleshoot the desulfurization hood fault, and specifically troubleshoot the faulty desulfurization hood lifting motor and desulfurization hood control device. Based on the final fault troubleshooting results, the analysis device sends instructions to the switching relay, automatically switching the backup control device to control the lifting of the desulfurization hood motor corresponding to the faulty control device. This greatly improves the working efficiency of the desulfurization hood and does not take up production time to handle faults.

[0071] In some embodiments, step S101 includes: obtaining a lifting motor resistance value when detecting a lifting motor resistance through a resistance detection device, wherein a lifting motor resistance value is represented as R; and obtaining the sum of the N lifting motor resistance values ​​when detecting N lifting motor resistances through a detection device, wherein the sum of the N lifting motor resistance values ​​is represented as r, r=R / N.

[0072] For example, a desulfurization hood detection system can be equipped with 26 desulfurization hoods. The control systems and hoisting loads of the 26 desulfurization hoods are exactly the same. The 26 desulfurization hoods can be numbered 1#, 2#, 3#, ... 26#. The 26 desulfurization hood control systems are equipped with an additional lifting motor resistance detection device and 26 relays. The analysis device can control the 26 relays to be energized separately. At this time, the 26 lifting motors are disconnected from the resistance detection device. Any one of the relays is controlled to lose power, so that the lifting motor is connected to the resistance detection device alone, and a resistance value of R is obtained. If two lifting motors are detected simultaneously, the sum of the resistance values ​​is R / 2. Similarly, if all 26 lifting motors are detected simultaneously, the sum of the resistance values ​​is R / 26. The resistance detection data obtained is sent to the analysis device. The analysis device analyzes the resistance value range based on the received resistance detection data. The resistance value range can be the resistance value ± the fluctuation value caused by the environment, or the resistance value ± the fluctuation value caused by the motor manufacturing. In order to take various influencing factors into consideration, the individual resistance values ​​of all motors can be tested on site, and then the average value is taken. The maximum difference between the average value and all individual resistance values ​​is calculated, and the maximum difference can be used as the fluctuation value.

[0073] In some embodiments, step S102 includes: obtaining status data of the control devices of N desulfurization hood lifting motors, wherein the status data includes: start status data, stop status data, operation status data, and fault status data of the lifting motors, wherein the status data is detected and displayed by the control device and sent to the analysis device; obtaining the lifting status information of the desulfurization hood lifting motor, wherein the lifting status information includes: normal lifting status of the lifting motor and abnormal lifting status information of the lifting motor; obtaining the status information of the control device, wherein the status information includes: normal status of the control device and abnormal status of the control device.

[0074] Exemplarily, the status data of the control devices of the 26 desulfurization hood lifting motors include: the 26 control devices control the start status, stop status, operation status, and fault status of the 26 lifting motors, wherein the status is detected and displayed by the control device and sent to the analysis device; the information of the 26 desulfurization hood lifting motors includes: the 26 lifting motors are normal, and the 26 lifting motors are abnormal; the information of the 26 control devices includes: the 26 control devices are normal, and the 26 control devices are abnormal; the 26 control devices are normal, which is one of the conditions for the 26 control devices to serve as backup control devices.

[0075] In some embodiments, step S103 includes: if a resistance detection value detected by the resistance detection device is within a first preset fluctuation range, then determining that a lift motor is normal; otherwise, determining that the currently detected lift motor is abnormal; if the control device corresponding to the currently normal lift motor is in a running state, a started state, or a stopped state, then determining that the control device corresponding to the normal lift motor is normal; if the control device corresponding to the currently normal lift motor is in a fault state, then determining that the control device corresponding to the normal lift motor is abnormal; if the control device corresponding to the currently abnormal lift motor is in a fault state, and if the control device corresponding to the abnormal lift motor is reset from the fault state to the stopped state by the analysis device within a preset time, then determining that the corresponding control device is normal; otherwise, determining that the corresponding control device is abnormal.

[0076] For example, when the resistance detection device detects a resistance detection value, the first preset fluctuation range is [R ± fluctuation value]. If the resistance detection device detects a resistance detection value within the first preset fluctuation range [R ± fluctuation value], the currently detected lifting motor is determined to be normal; otherwise, the currently detected lifting motor is determined to be abnormal. If the control device corresponding to the currently normal lifting motor is in a fault state, or changes from an operating state or a startup state to a fault state, the corresponding control device is determined to be abnormal. If the control device corresponding to the currently normal lifting motor is in an operating state, a startup state, or a stopped state, the corresponding control device is determined to be normal.

[0077] For example, if the resistance detection device detects a resistance value that is not within a first preset fluctuation range [R ± fluctuation value], the currently detected lifting motor is determined to be abnormal. Furthermore, if the corresponding control device is in a faulty state, or changes from an operating state or a startup state to a faulty state, and the corresponding control device is automatically reset from the faulty state to a stopped state by the analysis device within a preset time of 2 to 3 seconds, the corresponding control device is determined to be normal. Otherwise, the corresponding control device is determined to be abnormal. If the corresponding control device is in an operating state, a startup state, or a stopped state, the corresponding control device is determined to be normal.

[0078] For example, the first preset fluctuation range is [R±0.1]Ω, where the fluctuation value is 0.1. The set value of 0.1 is related to the motor manufacturer, motor power, motor winding type, and motor batch. The resistance of all lifting motors in the on-site desulfurization hood is tested, and the maximum resistance fluctuation value is 0.1Ω. The preset time is the time from the control device receiving the fault reset command from the analysis device to the control device completing the fault reset. The preset time can be 2 to 3 seconds.

[0079] In some embodiments, step S103 includes: if the sum of the N resistance detection values ​​detected by the resistance detection device is within a second preset fluctuation range, the N lifting motors are judged to be normal; otherwise, at least one of the N lifting motors detected by the resistance detection device is judged to be abnormal; if the control devices corresponding to the N lifting motors that are currently normal are in a running state, a starting state or a stopped state, the control devices corresponding to the N normal lifting motors are judged to be normal; if the control devices corresponding to the N lifting motors that are currently normal are in a fault state, the control devices corresponding to the N normal lifting motors are judged to be abnormal.

[0080] In some embodiments, if the sum of N resistance detection values ​​detected by the resistance detection device is not within a second preset fluctuation range [R / N ± fluctuation value], at least one of the N lift motors detected by the resistance detection device is determined to be abnormal. In this case, if n of the N lift motors are in startup or operation, the n startup or operation lift motors are normal, and the control devices corresponding to the n startup or operation lift motors are normal. The analysis device sequentially disconnects the abnormal (Nn) lift motors from the resistance detection device in ascending order of preset numbers until the sum of the resistance detection values ​​is within a third preset fluctuation range [R / (Nn-n1) ± fluctuation value]. The resistance of the lift motor with the last disconnection number is then determined to be abnormal. N represents the total number of lift motors whose resistance values ​​were detected by the detection device, n represents the number of startup or operation lift motors that are normal, and n1 represents the number of lift motors disconnected sequentially. If the control device corresponding to the abnormal lift motor is reset from a faulty state to a stopped state by the analysis device within a preset time of 2 to 3 seconds, the corresponding control device is determined to be normal. Otherwise, the corresponding control device is determined to be abnormal.

[0081] For example, there are 6 desulfurization hoods, which are numbered 1 to 6# in the analysis device. If the sum of the 6 resistance detection values ​​detected by the resistance detection device is not within the range of [R / 6±fluctuation value], it is determined that at least one of the 6 lifting motors detected by the resistance detection device is abnormal. At this time, if 2 of the 6 lifting motors are in startup or operation, the 2 lifting motors in startup or operation are normal, and the corresponding control devices are normal. The numbers of the two lifting motors are 2# and 6# respectively. The other 4 numbers are 1#, 3#, 4#,

[0082] If the 5# lifting motor is in a stopped state, disconnect the connection with the resistance detection device one by one, with the priority number from small to large, first disconnect 1#, then 3#, then 4#, and finally 5#. When disconnected for the second time, the resistance detection value is within [R / (6-n-n1)±fluctuation value], n=2, n1=2, then it is judged that the resistance of the 3# lifting motor is abnormal. If the corresponding 3# control device can automatically reset from the fault state to the stopped state within 2 to 3s, then it is judged that the corresponding 3# control device is normal, otherwise, it is judged that the corresponding 3# control device is abnormal; if the corresponding 3# control device is in a stopped state, then it is judged that the corresponding 3# control device is normal, among which n represents the number of lifting motors that are started or stopped normally, and n1 represents the second disconnection, that is, the number of lifting motors disconnected in sequence.

[0083] In some embodiments, if the sum of N resistance detection values ​​detected by the resistance detection device is not within a second preset fluctuation range [R / N ± fluctuation value], at least one of the N lift motors detected by the resistance detection device is determined to be abnormal. At this time, if m of the N control devices are in a faulty state, the analysis device preferentially disconnects the lift motors corresponding to the other Nm normal control devices from the resistance detection device. At this time, if the sum of the resistance detection values ​​is within a fourth preset fluctuation range [R / (Nm) ± fluctuation value], the lift motors corresponding to the m faulty control devices are determined to be normal and abnormal, and the lift motors corresponding to the Nm normal control devices are determined to be abnormal. Where N represents the total number of control devices, and m represents the number of faulty control devices. The analysis device then disconnects the m lifting motors corresponding to the m abnormal control devices from the resistance detection device one by one, in ascending order, according to a preset number. (1≤m≤N, where m is a natural number) until the sum of the resistance detection values ​​falls within a fifth preset fluctuation range [R / (Nma)±fluctuation value]. The last disconnected lifting motor is then judged to have an abnormal resistance. (a is a natural number, 1≤a≤Nm-1, representing the number of disconnected resistance detection devices.) The last disconnected lifting motor is then judged to have an abnormal resistance. Lifting motor #1 corresponds to control device #1, lifting motor #2 corresponds to control device #2, and so on. Lifting motor #N corresponds to control device #N. If the control device corresponding to the abnormal lifting motor is reset from a faulty state to a stopped state by the analysis device within a preset time, the corresponding control device is judged to be normal. Otherwise, the corresponding control device is judged to be abnormal.

[0084] For example, there are 26 desulfurization hoods, numbered 1 to 26 in the analysis device. If the sum of the 26 resistance values ​​detected by the resistance detection device is not within the range of [R / N ± fluctuation value], where N = 26, then at least one of the 26 lift motors detected by the resistance detection device is determined to be abnormal. In this case, if five of the 26 lift motors are in startup or operation, then the five starting or operating lift motors are normal, and the corresponding control devices are normal. The five starting or operating lift motors are numbered 1#, 3#, 6#, 7#, and 10#, respectively. The other 21 lifting motors numbered 2#, 4#, 5#, 8#, 9#, 11#, 12#…26# are in a stopped state. Disconnect the motors one by one from the resistance detection device, prioritizing disconnection numbers from smallest to largest. When the third lifting motor is disconnected from the resistance detection device, if the sum of the resistance detection values ​​is within [R / (Nma) ± fluctuation value], where N=26, m=5, and a=3, then the resistance of the last disconnected lifting motor #5 is determined to be abnormal. The last time is the third time. If the control device corresponding to the currently abnormal lifting motor #5 can automatically reset from a fault state to a stopped state within a preset time of 2 to 3 seconds, then the control device corresponding to the currently abnormal lifting motor #5 is determined to be normal. Otherwise, the corresponding control device is determined to be abnormal. If the control device corresponding to the currently abnormal lifting motor #5 is in a stopped state, then the corresponding control device is determined to be normal. If the control device corresponding to the abnormal lifting motor is reset from a fault state to a stopped state by the analysis device within a preset time of 2 to 3 seconds, then the corresponding control device is determined to be normal. Otherwise, the corresponding control device is determined to be abnormal.

[0085] In some embodiments, if the sum of N resistance detection values ​​detected by the resistance detection device is not within the second preset fluctuation range [R / N±fluctuation value], it is determined that at least one of the N lifting motors detected by the resistance detection device is abnormal. At the same time, if m of the N control devices are in a faulty state, where m is a natural number, 1≤m≤N, the connections between the lifting motors and the resistance detection devices corresponding to the other Nm control devices in a non-faulty state are preferentially disconnected at the same time. At this time, if the sum of the resistance detection values ​​is not within the fourth preset fluctuation range [R / m±fluctuation value], then it is judged that the m motors are abnormal. Then, the analysis device disconnects the connections between the lifting motors and the resistance detection devices corresponding to the control devices in the faulty state for the m motors one by one according to the preset numbers from small to large, until the sum of the resistance detection values ​​is within the sixth preset fluctuation range [R / Mmb±ambient temperature influence fluctuation]. Then, it is judged that the resistance of the lifting motor with the last disconnected number is abnormal. If the corresponding control device is reset from the faulty state to the stopped state by the analysis device within 2 to 3 seconds, then the corresponding control device is judged to be normal. Otherwise, the corresponding control device is judged to be abnormal. If the corresponding control device is in the stopped state, then the corresponding control device is judged to be normal. Wherein, b is a natural number, 1≤b≤m-1, and is the number of disconnected connections between the resistance detection device and the lifting motor.

[0086] For example, there are 26 desulfurization hoods, numbered 1 to 26 in the analysis device. If the sum of the 26 resistance values ​​detected by the resistance detection device is not within the range of [R / N ± fluctuation value], where N = 26, then at least one of the 26 lift motors detected by the resistance detection device is determined to be abnormal. In this case, if 5 of the 26 lift motors are faulty, the lift motors corresponding to the other 21 control devices in a non-faulty state are preferentially disconnected from the resistance detection device. The 5 lift motors in startup or operation are numbered 1#, 3#, 6#, 7#, and 10#, respectively. The lift motors corresponding to the other 21 control devices in a non-faulty state are numbered 2#, 4#, 5#, 8#, 9#, 11#, 12#, ... 26#, respectively. At this time, if the sum of the resistance detection values ​​is not within the fourth preset fluctuation range [R / 5±fluctuation value], it is judged that m=5 lifting motors are abnormal, and then the analysis device disconnects the lifting motors corresponding to the control device in the fault state from small to large one by one according to the preset numbers of the 5 lifting motors. When disconnected for the second time, the sum of the resistance detection values ​​is within the sixth preset fluctuation range [R / Nmb±ambient temperature influence fluctuation], where N=26, m=5, b=2, then it is judged that the resistance of the lifting motor with number 2# disconnected last is abnormal, and the corresponding 2# control device is reset from the fault state to the stop state by the analysis device within 2 to 3s, then the corresponding control device is judged to be normal, otherwise, the corresponding control device is judged to be abnormal. If the corresponding control device is in the stop state, then the corresponding control device is judged to be normal.

[0087] In some embodiments, step S105 includes: analyzing the normal status information of the control device, including: stop status, running status and start status; when the control device is in the stop status and the desulfurization hood is in the upper limit position or the lower limit position, it is judged that the control device has the conditions to serve as a backup control device; if the current control device has the conditions to serve as a backup control device, then when other desulfurization hood lifting motors other than the current control device are abnormal, the analysis device controls the switching relay so that the backup control device is connected to the lifting motor corresponding to the abnormal state control device, and the lifting motor maintains the lifting action before the abnormality; when the lifting motor is lifted to the target position, the lifting motor is stopped, and the analysis device controls the switching relay so that the backup control device is connected to the lifting motor before switching; wherein, when the analysis device controls the switching relay and the corresponding backup control device, the backup control device with a smaller number is preferentially selected.

[0088] Exemplarily, the desulfurization hood fault detection system further includes a lifting detection device, which is installed one-to-one with the desulfurization hood and is used to detect a lifting position signal of the desulfurization hood.

[0089] For example, 26 desulfurization hoods are equipped with 26 lift detection devices, each installed one-to-one with the 26 desulfurization hoods. The lift detection devices transmit lift status data to the analysis device. The lift status data includes upper limit position signals, lower limit position signals, and optional intermediate position signals.

[0090] In some embodiments, the control device can automatically reset from a fault state to a stop state within a preset time, further comprising: the analyzing device detects that the control device is in a fault state, and the analyzing device issues a fault reset command to the control device within a preset time of 2 to 3 seconds, causing the control device to switch from the fault state to the stop state. If the control device receives the fault reset command from the analyzing device and does not switch from the fault state to the stop state within the preset time of 2 to 3 seconds, the analyzing device stops sending the fault reset command to the control device, and the control device remains in the fault state. If the control device receives the fault reset command from the analyzing device and switches from the fault state to the stop state within the preset time of 2 to 3 seconds, the analyzing device stops sending the fault reset command to the control device, and the control device remains in the stop state, and the control device awaits a start command or a run command from the analyzing device.

[0091] A second aspect of an embodiment of the present application provides a desulfurization hood fault detection system. Figure 2 This is a schematic structural diagram of a desulfurization hood fault detection system provided in an embodiment of the present application. Figure 2As shown, the desulfurization hood fault detection system includes N desulfurization hoods, each equipped with a desulfurization hood lift motor. The desulfurization hood lift motors correspond to their numbers. The desulfurization hood lift motors include desulfurization hood lift motor 1#, desulfurization hood lift motor 2#, desulfurization hood lift motor 3#, and so on, with N being a natural number greater than 1. The desulfurization hood relays include desulfurization hood relay 1#, desulfurization hood relay 2#, desulfurization hood relay 3#, and so on, with N being a natural number greater than 1. The control devices include control device 1#, control device 2#, control device 3#, and so on, with N being a natural number greater than 1. The control devices are used to control and detect the start, stop, and operation of the desulfurization hood lift motors. The control devices are used to switch control and detect fault conditions of the desulfurization hood lift motors and control devices. An analysis device is connected to the resistance detection device and the control device, respectively. The analysis device is used to analyze received resistance detection data, lift status data, and fault conditions to enable switching control and lift control of the desulfurization hood control devices, as well as further fault analysis. The desulfurization hood relay is located between the desulfurization hood lift motor and the resistance detection device. When powered, it disconnects the motor from the resistance detection device. A switching relay, connected to the analysis device, controls the switchover between the backup control device and the abnormal control device, connecting the backup control device to the corresponding motor of the abnormal control device. The number of switching relays is equal to the number of parallel lift motors. The desulfurization hood lift motors correspond to the control devices, the desulfurization hood lift motors correspond to the desulfurization hood relays, and the switching relays correspond to the lift motors.

[0092] For example, N desulfurization hood lifting motors are hardwired in parallel to a resistance detection device 100, which is then hardwired to an analysis device 300. The resistance detection device 100 can detect the resistance of each desulfurization hood lifting motor individually, or detect the sum of the resistances of all N desulfurization hood lifting motors in a one-to-one manner. The resistance detection device 100 generates resistance detection data and transmits it to the analysis device 300. Each desulfurization hood is equipped with a set of lift detection devices, and each of the N lift detection devices is hardwired to an analysis device 300. The N lift detection devices detect the lifting position of the N desulfurization hoods one-to-one, where the lifting position includes the raised position and the lowered position, and is not limited to any intermediate positions. These devices generate a lifting position signal and transmit it to the analysis device 300. The desulfurization hood control device can be a remotely reset device with a motor detection and protection system, such as a frequency converter, soft starter, or motor protector. The desulfurization hood control device can monitor and display the lifting and lowering operation status, start status, stop status, and fault status of the desulfurization hood lifting motor and the desulfurization hood control device. N control devices are connected to N desulfurization hood lifting motors and an analysis device 300. Based on the received resistance detection data, the status of the control device, and the upper or lower limit position signals, the analysis device 300 performs one-on-one fault detection and analysis on the status of the N desulfurization hood motors and N desulfurization hood lifting control devices. It then sends instructions to the desulfurization hood relay to automatically troubleshoot the desulfurization hood fault, specifically identifying the faulty desulfurization hood lifting motor and desulfurization hood control device. Based on the final fault troubleshooting results, the analysis device 300 sends instructions to the switching relay to automatically switch to the backup control device to control the lifting of the desulfurization hood motor corresponding to the faulty control device. Automatically determining the switching conditions and automatically controlling the process prevents lifting control system faults from affecting the desulfurization hood lifting operation and reduces the frequency of overhead crane lifting of the slag pot from a faulty desulfurization hood to other functioning desulfurization hoods. This significantly improves the desulfurization hood's operating efficiency and saves production time from troubleshooting faults.

[0093] Typically, the control systems of multiple identical desulfurization hoods and lifting motors are designed to be independently controlled, or have one as a backup for one, or several as backup for several, or 2 to 3 sets as backup for each other. The above systems are manually or remotely switched and controlled, or the status of each system is monitored online. However, these control methods do not utilize other equally independent devices to automatically determine the fault location of the system, nor do they use the faulty device to automatically determine whether other independent devices have faults, and automatically switch based on the fault status to control the faulty device to continue operating.

[0094] The desulfurization hood fault detection system provided in the embodiment of the present application is configured to connect N desulfurization hood lifting motors by setting a resistance detection device, so that the resistance detection device performs one-to-one individual detection and one-to-N detection on the resistance of the desulfurization hood lifting motor; by setting N lifting detection devices to detect the lifting status of N desulfurization hoods one-to-one, an analysis device is used to directly receive the detection status data sent by the resistance detection device, the lifting detection device and the control device, and perform one-to-one fault detection and analysis on the status of the N desulfurization hood motors and the N desulfurization hood lifting control devices respectively, and send instructions to the desulfurization hood relay to automatically troubleshoot the desulfurization hood fault, and can specifically troubleshoot the faulty desulfurization hood lifting motor and desulfurization hood control device. The analysis device sends instructions to the switching relay based on the final fault troubleshooting result, and automatically switches the backup control device to control the lifting of the desulfurization hood motor corresponding to the faulty control device. It can automatically determine the fault location, automatically determine the switching conditions, and automatically control the processing to avoid the lifting control system failure affecting the lifting action of the desulfurization hood, and reduce the frequency of overhead crane lifting the slag pot from the faulty desulfurization hood to other normal desulfurization hoods, which greatly improves the working efficiency of the desulfurization hood and does not take up production time to handle the fault.

[0095] In some embodiments, N desulfurization hood lift motors are connected in parallel, with the number of parallel motors greater than one and less than four forming a group. This forms a desulfurization hood lift motor switching circuit to ensure switching control between the backup control device and the abnormal desulfurization hood lift motor. A resistance detection device is connected in parallel to the N desulfurization hood lift motor circuit; an analysis device is used to disconnect different desulfurization hood lift motors from the resistance detection device to identify the desulfurization hood lift motor with an abnormal resistance; and an analysis device is used to control different switching relays to connect the backup control device to the abnormal lift motor, control the lifting movement of the lift motor, and switch back to control of the corresponding lift motor. The number of parallel lift motors is limited to greater than one and less than four. Adjacent desulfurization hood lift motors can be grouped together, or four adjacent lift motors can be grouped together to form a desulfurization hood lift motor switching circuit to ensure switching control between the backup control device and the abnormal desulfurization hood lift motor. By grouping the desulfurization hoods to form a switching circuit, excessive parallel wiring, which can make equipment connection difficult, and excessive wiring that wastes cables, can be avoided, thereby reducing the complexity of the analysis device's control switching.

[0096] In some embodiments, a resistance detection device can be connected in parallel with the switching circuits for N desulfurization hood lift motors. An analysis device can disconnect the control circuits between different desulfurization hood lift motors and the resistance detection device to identify the desulfurization hood lift motor with an abnormal resistance. An analysis device can control different switching relays, connecting a backup control device to the abnormal lift motor, controlling the lift motor's lifting motion, and switching back to the corresponding lift motor. Using a single resistance detection device and an analysis device, switching control and fault detection between adjacent desulfurization hoods can be achieved, avoiding the waste of cable caused by excessive distances between multiple desulfurization hoods and excessively long cable runs.

[0097] For example, there are 26 desulfurization hoods installed on site, numbered 1#, 2#, 3#, ..., 26#. The desulfurization hood lift motors are numbered 1#, 2#, 3#, ..., 26#. When testing the resistance of a desulfurization hood lift motor, assume the resistance of one desulfurization hood motor is R. After the resistance detection device disconnects from desulfurization hood lift motor 1, the resistance detection device detects that the sum of the resistances of desulfurization hood lift motors 2# through 26# is R / 25. The resistance detection device then disconnects from desulfurization hood lift motor 2, and the resistance detection device detects that the sum of the resistances of desulfurization hood lift motors 3# through 26# is R / 24. If desulfurization hoods 1#, 3#, and 6# are the closest in actual distance, then 1#, 3#, and 6# are grouped together to shorten the cable run and conserve cable. Each group of three closely spaced desulfurization hoods can be divided into nine groups, resulting in the 26 desulfurization hoods being divided into nine groups. Since the analysis device can analyze 26 desulfurization hood systems at the same time, the fault response speed can be improved. However, the switching control is grouped, which can reduce the complexity of the switching control, reduce the number of cable connections, improve the continuity of the desulfurization hood automatic control, and reduce the failure rate.

[0098] In some embodiments, the desulfurization hood fault detection system further includes a lift detection device, which is installed one-to-one with the desulfurization hood and is configured to detect a lift position signal of the desulfurization hood, wherein the lift position includes an upper limit position and a lower limit position. The upper limit position corresponds to a target rising position of the desulfurization hood, and the lower limit position corresponds to a target descending position of the desulfurization hood.

[0099] Exemplarily, the desulfurization hood fault detection system also includes 26 desulfurization hood lift detection devices, each connected to an analysis device and directly transmitting position signals to the analysis device. The lift detection devices are used to detect the desulfurization hood's full lift position. The upper limit position corresponds to the desulfurization hood's full lift position, and the lower limit position corresponds to the desulfurization hood's full lift position. The lift detection devices can be position encoders, mechanical limit switches, proximity limit switches, or other devices capable of detecting the desulfurization hood's position, capable of detecting the desulfurization hood's full lift position and its full lift position. Each desulfurization hood position signal includes an upper limit signal and a lower limit signal. When the desulfurization hood rises to the open position, for example, the upper limit proximity switch detects the desulfurization hood's full lift position, generating an upper limit signal and transmitting it to the analysis device. When the desulfurization hood descends to the closed position, the lower limit proximity switch detects the desulfurization hood's full lift position and generating a lower limit signal and transmitting it to the analysis device. Upon receiving the upper limit signal or the lower limit signal, the analysis device issues a desulfurization hood lift stop command, controlling the desulfurization hood's lift and lowering. The control device can determine whether the desulfurization hood lifting control system has the function of controlling the lifting motor of the desulfurization hood by receiving the upper limit signal and the lower limit signal, thereby realizing the automatic detection of the desulfurization hood lifting control system.

[0100] In some embodiments, the desulfurization hood fault detection system further includes 26 desulfurization hood relays 1# to 26#, one for each desulfurization hood lifting motor. Each desulfurization hood relay is connected one-to-one to the desulfurization hood lifting motor. Each of the 26 desulfurization hood relays is hardwired to the analysis device, and each of the 26 desulfurization hood relays is hardwired to the resistance detection device. Each desulfurization hood relay is located between the current desulfurization hood lifting motor and the resistance detection device. During desulfurization hood lifting motor resistance detection, the desulfurization hood lifting motor is connected to the resistance detection device, and the sum of the resistances of the 26 desulfurization hood lifting motors is detected to be R / 26. If the analysis device controls desulfurization hood relay 1# to be energized, desulfurization hood relay 1# is configured to disconnect the 1# desulfurization hood motor from the resistance detection device when energized. In this case, the resistance detection device cannot detect the resistance of the 1# desulfurization hood lifting motor, and the resistance detection device can detect the sum of the resistances of the other desulfurization hood lifting motors except 1#. The analysis device can control the 26 desulfurization hood relays to energize individually, simultaneously, or partially to complete the resistance test of one or more desulfurization hood lift motors. The desulfurization hood lift motors tested can be those in operation, starting, stopped, or malfunctioning. The desulfurization hood relay settings allow the analysis device to automatically complete the desulfurization hood lift motor resistance test, saving time in manual operation and switching control, and improving the efficiency of desulfurization hood resistance testing.

[0101] In some embodiments, the desulfurization hood fault detection system further includes a switching relay, the number of which is the same as the number of parallel motors, which are respectively connected to the analysis device and used to control the connection and disconnection of the backup control device with the abnormal lifting motor.

[0102] For example, the 1#, 2#, and 3# desulfurization hoods form a group. If the 2# desulfurization hood fails, the analysis device determines that control devices 1# and 3# are available as backup control devices. The analysis device selects control device 1# in ascending order of priority based on the backup control device number. The analysis device preferentially controls switching relay 1# to energize and disconnect the 1# control device from the 1# lifting motor. The analysis device controls switching relay 2# to energize and disconnect the 2# control device from the 2# lifting motor. The analysis device simultaneously controls the connection between the 1# control device and the 2# lifting motor, allowing the 2# lifting motor to continue lifting. When the 2# desulfurization hood reaches the upper or lower limit position and stops, switching relays 1# and 2# are controlled to de-energize, connecting the 1# control device to the 1# lifting motor and the 2# control device to the 2# lifting motor. At this point, if the 2# desulfurization hood stops at its lower limit, the water pumping time is very long, which allows ample time to deal with the 2# control device failure without affecting production time. If the 2# desulfurization hood stops at its upper or lower limit position, a crane is required to remove the slag pot, which also allows ample time to deal with the 2# control device failure without affecting production time.

[0103] In some embodiments, the desulfurization hood fault detection system also includes a host computer, which can be a computer for displaying various status information transmitted by the analysis device, and can also send instructions to the analysis device. The host computer is communicatively connected to the analysis device, and the analysis device can be a programmable controller. The analysis device and the control device can be communicatively connected or hard-wired. The control device sends the detected desulfurization hood fault information to the analysis device, and the analysis device then sends the information to the host computer to prompt the operator to handle the fault.

[0104] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0105] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0107] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0108] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

Claims

1. A desulfurization hood fault detection method, characterized in that: The detection method comprises: Detecting the resistance of one or N desulfurization hood lifting motors by a resistance detection device to obtain resistance detection data, wherein the resistance detection data includes a resistance detection value or the sum of N resistance detection values, where N is a natural number greater than 1, and sending the resistance detection data to an analysis device; Acquiring status data of control devices of N desulfurization hood lifting motors; By means of the analyzing device, the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device are analyzed based on the resistance detection data and the state data; By means of the analyzing device, based on the lifting state information of the N desulfurization hood lifting motors and the corresponding operating state information of the control device, it is analyzed whether the control device has the conditions to serve as a backup control device; Under the condition that the control device has the function of serving as a backup control device, the control device is controlled to switch to the backup control device in the order of numbers, and the desulfurization hood lifting motor is controlled to operate, wherein the analysis device sequentially numbers the N desulfurization hood lifting motors and the corresponding control devices.

2. The desulfurization hood fault detection method according to claim 1, characterized in that: The resistance detection device detects the resistance of one or N desulfurization hood lifting motors to obtain a resistance detection value or the sum of N resistance detection values, including: When the resistance of the lifting motor is detected by the resistance detection device, a resistance value of the lifting motor is obtained, wherein the resistance value of the lifting motor is represented by R; or When the detection device detects N lift motor resistors, the sum of the resistance values ​​of the N lift motors is obtained, wherein the sum of the resistance values ​​of the N lift motors is expressed as r, where r=R / N.

3. The desulfurization hood fault detection method according to claim 1, characterized in that: According to the state data of the control devices of the N desulfurization hood lifting motors, the analyzing device respectively obtains information of the N desulfurization hood lifting motors and information of the control devices, and the method further includes: Acquire status data of the control devices of N desulfurization hood lifting motors, wherein the status data includes: start status data, stop status data, operation status data, and fault status data of the lifting motors, wherein the status data is detected and displayed by the control device and sent to the analysis device; Acquiring lifting state information of the desulfurization hood lifting motor, wherein the lifting state information includes: normal lifting state information of the lifting motor and abnormal lifting state information of the lifting motor; Acquire status information of the control device, wherein the status information includes: a normal state of the control device and an abnormal state of the control device.

4. The desulfurization hood fault detection method according to claim 1, characterized in that: The analyzing device analyzes and obtains the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device based on the resistance detection data and the state data, including: If the resistance detection value detected by the resistance detection device is within the first preset fluctuation range, it is determined that one of the lifting motors is normal; otherwise, it is determined that the currently detected one of the lifting motors is abnormal; If the control device corresponding to the currently normal lifting motor is in the running state, the starting state or the stopping state, then it is determined that the control device corresponding to the normal lifting motor is normal; or, If the control device corresponding to the currently normal lifting motor is in a fault state, it is determined that the control device corresponding to the normal lifting motor is abnormal; or If the control device corresponding to one of the lifting motors that is currently abnormal is in a fault state, and if the control device corresponding to the abnormal lifting motor is reset from the fault state to the stop state by the analysis device within a preset time, then the corresponding control device is judged to be normal; otherwise, the corresponding control device is judged to be abnormal.

5. The desulfurization hood fault detection method according to claim 1, characterized in that: The analyzing device analyzes and obtains the lifting state information of the N desulfurization hood lifting motors and the operating state information of the control device based on the resistance detection data and the state data, including: If the sum of the N resistance detection values ​​detected by the resistance detection device is within the second preset fluctuation range, it is determined that the N lifting motors are normal; otherwise, it is determined that at least one of the N lifting motors detected by the resistance detection device is abnormal; If the control devices corresponding to the N normal lifting motors are in a running state, a starting state or a stopping state, then it is determined that the control devices corresponding to the N normal lifting motors are normal; or, If the control devices corresponding to the N lifting motors that are currently in normal state are in a fault state, then it is determined that the control devices corresponding to the N lifting motors that are currently in normal state are abnormal; or If the sum of N resistance detection values ​​detected by the resistance detection device is not within the second preset fluctuation range, the analysis device disconnects the abnormal lifting motor from the resistance detection device in ascending order according to the number. If the sum of the resistance detection values ​​is within the third preset fluctuation range, it is determined that the resistance of the lifting motor with the last disconnection is abnormal. If the control device corresponding to the abnormal lifting motor is reset from a fault state to a stopped state by the analysis device within a preset time, it is determined that the corresponding control device is normal. Otherwise, it is determined that the corresponding control device is abnormal. or; If at least one of the N lifting motors detected by the resistance detection device is abnormal, the analysis device disconnects the lifting motor corresponding to the normal control device from the resistance detection device. At this time, if the sum of the resistance detection values ​​is within the fourth preset fluctuation range, the analysis device disconnects the lifting motor corresponding to the abnormal control device from the resistance detection device one by one according to the number, in ascending order, until the sum of the resistance detection values ​​is within the fifth preset fluctuation range. It is then judged that the resistance of the lifting motor with the last disconnection number is abnormal. If the control device corresponding to the abnormal lifting motor is reset from a fault state to a stopped state by the analysis device within a preset time, it is judged that the corresponding control device is normal. Otherwise, it is judged that the corresponding control device is abnormal.

6. The desulfurization hood fault detection method according to claim 1, characterized in that: Under the condition that the control device is capable of serving as a backup control device, the control device is controlled to switch to the backup control device in a numbered order, and the desulfurization hood lifting motor is controlled to operate, wherein the analyzing device sequentially numbers the N desulfurization hood lifting motors, including: Analyzing normal status information of the control device, including: a stopped state, an operating state, and a started state; when the control device is in the stopped state and the desulfurization hood is in the upper limit position or the lower limit position, determining that the control device is qualified to serve as the backup control device; If the current control device is qualified to serve as the backup control device, then when an abnormality occurs in any of the desulfurization hood lifting motors other than the current control device, the analysis device controls the switching relay so that the backup control device is connected to the lifting motor corresponding to the abnormal control device, and the lifting motor maintains the lifting action before the abnormality occurs. When the lifting motor reaches the target position, the lifting of the lifting motor is stopped, and the analysis device controls the switching relay so that the backup control device is connected to the lifting motor before the switching. When the analyzing device controls the switching relay and the corresponding backup control device, the backup control device with a smaller number is preferentially selected.

7. The desulfurization hood fault detection method according to claim 4 or 5, characterized in that: The control device can automatically reset from a fault state to a stopped state within a preset time, and the detection method further includes: The analyzing device detects that the control device is in a fault state, and the analyzing device sends a fault reset command to the control device within a preset time to switch the control device from the fault state to a stopped state; or If the control device receives the fault reset command from the analysis device and does not change from the fault state to the stop state within the preset time, the analysis device stops sending the fault reset command to the control device, and the control device remains in the fault state; or If the control device receives a fault reset command from the analysis device and switches from a fault state to a stop state within a preset time, the analysis device stops sending the fault reset command to the control device, the control device remains in the stop state, and the control device waits for a start command or a run command from the analysis device.

8. A desulfurization hood fault detection system, characterized in that: The desulfurization hood fault detection method according to any one of claims 1 to 7 is applied, wherein the detection system comprises: N desulfurization hoods, each of the N desulfurization hoods including N corresponding desulfurization hood lifting motors, wherein the number of each desulfurization hood corresponds to the number of each desulfurization hood lifting motor, and N is a natural number greater than 1; a resistance detection device, one of the resistance detection devices being connected to each of the N desulfurization hood lifting motors, and configured to detect the resistance of one or the N desulfurization hood lifting motors to obtain resistance detection data, wherein the resistance detection data includes a resistance detection value or the sum of N resistance detection values; A control device, each of which is connected one-to-one with the desulfurization hood lifting motor, and is used to control and detect the start, stop and operation of the desulfurization hood lifting motor. The control device is used to switch control and detect fault conditions of the desulfurization hood lifting motor and the control device; The analyzing device is connected to the resistance detecting device and the control device respectively, and is used to analyze the received resistance detection data, the lifting state data and the fault state to perform switching control, lifting control and further fault analysis on the control device of the desulfurization hood; a desulfurization hood relay, the desulfurization hood relay being arranged between the desulfurization hood lifting motor and the resistance detection device, and the desulfurization hood relay being used to disconnect the desulfurization hood lifting motor and the resistance detection device when powered; A switching relay is connected to the analyzing device and is used to control the backup control device to switch with the abnormal control device corresponding to the lifting motor, wherein the number of the switching relays is the same as the number of the lifting motors connected in parallel.

9. The desulfurization hood fault detection system according to claim 8, characterized in that: N desulfurization hood lifting motors are connected in parallel, the number of parallel lifting motors is greater than 1 and less than 4, wherein 2 to 3 motors form a group, forming a desulfurization hood lifting motor switching circuit to ensure the switching control of the backup control device and the abnormal desulfurization hood lifting motor; One of the resistance detection devices is connected in parallel with N of the desulfurization hood lifting motor switching circuits; One of the analyzing devices is used to control the disconnection between different desulfurization hood lifting motors and the resistance detecting device to determine the desulfurization hood lifting motor with abnormal resistance; One of the analysis devices is used to control different switching relays, control the backup control device to connect to the lifting motor corresponding to the abnormal control device, control the lifting action of the lifting motor, and switch back to the corresponding lifting motor control.

10. The desulfurization hood fault detection system according to claim 8, characterized in that: Also includes: A lifting detection device is installed one-to-one with the desulfurization hood, and the lifting detection device is used to detect the lifting position signal of the desulfurization hood, wherein the lifting position includes an upper limit position and a lower limit position, the upper limit position corresponds to the rising target position of the desulfurization hood, and the lower limit position corresponds to the descending target position of the desulfurization hood.

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