Relay fault automatic relief method, system and electric furnace

Abstract

The present invention discloses a relay fault automatic release method, system and electric furnace, step S1: detecting the operating parameters of the controller; step S2: judging whether the controller outputs a signal according to the operating parameters, if so, it is considered that the relay is working normally, returning to step S1, and continuing to detect the operating parameters of the controller; if not, continuing to judge whether the first relay outputs the first signal, if not, returning to step S1, and continuing to detect the operating parameters of the controller; if so, the first relay is judged to be a adhesion fault, and a cut-off signal is output to the second relay; step S3: judging whether the second relay outputs the second signal, if so, the second relay is judged to be a adhesion fault, and relay fault information is output; if not, the power supply of the first relay is cut off by the second relay, and relay fault information is output. The present invention can improve the relay contact adhesion fault detection efficiency and the adhesion fault processing timeliness.

Description

Technical Field

[0001] The present invention relates to the technical field of electric furnace cover lifting, and in particular to a method and system for automatically clearing a relay fault, and an electric furnace. Background Art

[0002] In metallurgical enterprises, many equipment are driven by hydraulic power, such as the furnace cover of an electric furnace. The control part of its lifting and lowering is composed of three hydraulic valves, two of which are reversing valves that control the lifting and lowering, which are often called pilot valves. The prerequisite for the lifting of the furnace cover is that the stop valve must be open. Its function is to cut off the oil circuit and keep the furnace cover stationary after it is lifted to any height and stopped. The stop valve is output by the PLC controller and then controlled by the relay to open and close. The relay controlling the stop valve is repeatedly disconnected, and after long-term operation, it will have a fault that the contacts cannot automatically separate after slight arcing. This is the abnormal output of the relay. Once the stop valve is opened, the furnace cover weighing several tons will slide down under the action of gravity, causing damage to the furnace shell and furnace cover. If it occurs during normal production, it may also cause serious safety accidents.

[0003] However, in the prior art, the adhesion fault of the electric furnace relay is usually maintained manually. That is, when the operator finds that the furnace cover of the electric furnace has completed its rise and is sliding down, the operator stops the machine and manually replaces the relay for maintenance. However, there are defects such as low efficiency in detecting the adhesion fault of the relay contact and low timeliness in handling the fault.

[0004] Therefore, there is an urgent need for a method and device that can improve the efficiency of relay contact adhesion fault detection and the timeliness of adhesion fault processing. Summary of the Invention

[0005] To this end, the present invention provides a method and system for automatically clearing a relay fault, and an electric furnace, which overcome the defects of the prior art.

[0006] To solve the above technical problems, the present invention provides a method for automatically clearing a relay fault, comprising:

[0007] Step S1: detecting the operating parameters of the controller;

[0008] Step S2: Determine whether the controller outputs a signal based on the operating parameters. If so, it is considered that the relay is operating normally, and the process returns to step S1 to continue detecting the operating parameters of the controller. If not, it is further determined whether the first relay outputs a first signal. If not, the process returns to step S1 to continue detecting the operating parameters of the controller. If so, the first relay is determined to have a sticking fault, and a cut-off signal is output to the second relay.

[0009] Step S3: Determine whether the second relay outputs a second signal. If so, determine that the second relay has a sticking fault and output relay fault information. If not, cut off the power supply of the first relay through the second relay and output relay fault information.

[0010] Furthermore, the operating parameters of the controller include the operating state of the controller, input and output signals, and signal output time.

[0011] Furthermore, a method for determining whether the first relay outputs the first signal or whether the second relay outputs the second signal is:

[0012] Step S20: Calculating the signal output time of the first relay or the second relay;

[0013] Step S21: Determine whether the signal output time of the first relay or the second relay exceeds the preset output time. If so, determine the first relay or the second relay as a adhesion fault and output relay fault information; if not, return to step S20, recalculate the signal output time of the first relay or the second relay, and output relay alarm information.

[0014] Furthermore, the method of outputting relay fault information is:

[0015] Step S70: Outputting the fault relay number and fault type to the control panel;

[0016] Step S71: The control panel displays the number of the faulty relay and the type of fault.

[0017] Furthermore, the method for determining that the first relay has a adhesion fault is as follows:

[0018] Step S400: disconnecting / opening the first relay from the power supply for a preset number of times;

[0019] Step S401: Determine whether the first relay outputs a signal. If so, determine that the first relay has a sticking fault, output a cutoff signal to the second relay, and output first fault information of the first relay; if not, output second fault information of the first relay.

[0020] Furthermore, the method for determining that the second relay has a adhesion fault is as follows:

[0021] Step S600: disconnecting / opening the second relay from the power supply for a preset number of times;

[0022] Step S601: Determine whether the second relay outputs a signal. If so, determine the second relay as having a sticking fault and output third fault information of the second relay; if not, output fourth fault information of the second relay.

[0023] The present invention also provides a relay fault automatic clearing system, comprising:

[0024] A first judgment module detects operating parameters of the controller; determines whether the controller outputs a signal based on the operating parameters; if so, it is considered that the relay is operating normally and the operating parameters of the controller are continuously detected; if not, it is further determined whether the first relay outputs a first signal; if not, it is further detected that the operating parameters of the controller are continuously detected; if so, it is determined that the first relay has a adhesion fault and a cut-off signal is output to the second relay;

[0025] a second judgment module, determining whether the second relay outputs a second signal; if so, determining that the second relay has a adhesion fault and outputting relay fault information; if not, cutting off the power supply of the first relay through the second relay and outputting relay fault information;

[0026] Fault display module, displays relay fault information or alarm information.

[0027] Furthermore, it also includes:

[0028] The electric furnace assembly includes a controller, a shut-off valve, and a control panel. The controller is used to control the lifting and lowering of the furnace cover of the electric furnace; the shut-off valve is used to control the parking of the furnace cover of the electric furnace; and the control panel is used to provide visual operation of the electric furnace.

[0029] The relay assembly includes a first relay, a second relay, a third relay and a fourth relay, wherein the first relay, the third relay and the fourth relay are respectively connected to the stop valve, and the second relay is connected to the first relay.

[0030] Furthermore, the step of determining whether the third relay or the fourth relay is faulty is as follows:

[0031] Step S100: detecting the operating parameters of the stop valve;

[0032] Step S101: Determine whether the stop valve outputs a signal based on the operating parameters of the stop valve. If not, it is considered that the relay is working normally, and the process returns to step S100 to continue detecting the operating parameters of the stop valve. If so, it is further determined whether the third relay or the fourth relay outputs a signal. If so, the process returns to step S100 to continue detecting the operating parameters of the stop valve. If not, the third relay or the fourth relay is determined to be a broken fault, the stop valve is closed through the first relay, and relay fault information is output.

[0033] The present invention also provides an electric furnace, comprising the automatic relay fault relief system.

[0034] The above technical solution of the present invention has the following advantages over the prior art:

[0035] The relay fault automatic correction method, system and electric furnace described in the present invention detect the output signal of the controller in real time after the furnace cover rises. After the controller does not output a signal, if the first relay output signal is detected, it is determined that the first relay has a contact adhesion fault. The first relay is cut off by the second relay, and then the stop valve is closed to prevent the furnace cover from descending and amplifying the fault. A relay fault information prompt is sent to the operator through the control panel of the electric furnace to remind the operator to replace the relay in time, thereby improving the efficiency of relay contact adhesion fault detection and the timeliness of adhesion fault processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0037] Figure 1 It is a flow chart of the method for automatically clearing a relay fault of the present invention.

[0038] Figure 2 It is a flow chart of the relay fault time detection method of the present invention.

[0039] Figure 3 It is a flow chart of the relay fault display method of the present invention.

[0040] Figure 4 4 is a flow chart of a first relay fault handling method of the present invention.

[0041] Figure 5 4 is a flow chart of the second relay fault processing method of the present invention.

[0042] Figure 6 It is a connection relationship diagram of the relay fault automatic release system of the present invention.

[0043] Figure 7It is a connection diagram of the electric furnace assembly and the relay assembly of the present invention.

[0044] Figure 8 4 is a flow chart of a method for detecting faults of the third and fourth relays of the present invention.

[0045] Explanation of the markings in the specification: 1. First judgment module, 2. Second judgment module, 3. Fault processing module, 4. Fault display module, 5. Electric furnace assembly, 6. Relay assembly, 50. Controller, 51. Shut-off valve, 52. Control panel, 60. First relay, 61. Second relay, 62. Third relay, 63. Fourth relay. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0047] In the description of the present invention, it is to be understood that the term "comprising" is intended to cover non-exclusive inclusions, such as a process, method, system, product or apparatus that includes a series of steps or units, is not limited to the listed steps or units but optionally includes steps or units that are not listed, or optionally includes other steps or units that are inherent to these processes, methods, products or apparatus.

[0048] Example 1

[0049] Reference Figure 1-3 As shown, the present invention provides an embodiment of a method for automatically clearing a relay fault, the method comprising the following steps:

[0050] Step S1: Detecting the operating parameters of the controller 50;

[0051] Step S2: judging whether the controller 50 outputs a signal according to the operating parameters of the controller 50; if so, it is considered that the relay is working normally, and the process returns to step S1 to continue detecting the operating parameters of the controller 50; if not, proceeding to the next step;

[0052] Step S3: Determine whether the first relay 60 outputs the first signal. If not, return to step S1 to continue detecting the operating parameters of the controller 50. If yes, proceed to the next step.

[0053] Step S4: determining that the first relay 60 is in a sticking fault and outputting a cut-off signal to the second relay 61;

[0054] Step S5: Determine whether the second relay 61 outputs a second signal;

[0055] Step S6: If yes, the second relay 61 is determined to be a sticking fault; if not, the power supply of the first relay 60 is cut off through the second relay 61;

[0056] Step S7: Output relay fault information.

[0057] In step S1 , the operating parameters of the controller 50 are detected in real time.

[0058] In step S2, based on the operating parameters of the controller 50, it is determined in real time whether the controller 50 outputs a signal; if the controller 50 does not output a signal, step S3 is executed; if the controller 50 outputs a signal, it is considered that the first relay is working normally, and the process returns to step S1 to continue detecting the operating parameters of the controller 50; wherein, the operating parameters of the controller 50 include but are not limited to the operating status of the electric controller 50, the input and output signals, and the signal output time.

[0059] In step S3, it is determined in real time whether the first relay 60 outputs the first signal; if the first relay 60 outputs the first signal, step S4 is executed; if the first relay 60 does not output the first signal, the process returns to step S1 to continue detecting the operating parameters of the controller 50; wherein, the first signal refers to the signal output by the first relay 60.

[0060] In step S4, the first relay 60 is judged to have a contact sticking fault, and a disconnection signal is output to the second relay 61; the contact sticking fault means that when the first relay 60 is energized, due to the abnormally large current, the Joule heat generated by the contact resistance causes the metal of the contact part of the two contacts to melt, weld, and combine, making it impossible to disconnect.

[0061] In step S5, after determining that the first relay 60 has a contact adhesion fault, it is determined whether the second relay 61 outputs a second signal; if the second relay 61 outputs the second signal, step S6 is executed; if the second relay 61 does not output the first signal, step S50 is executed: the power supply to the first relay 60 is cut off by the second relay 61, thereby closing the stop valve 51. After the stop valve 51 is closed, the furnace cover of the electric furnace stops to prevent the furnace cover from continuing to descend and causing a production accident;

[0062] In step S6 , the second relay 61 is determined to have a contact adhesion fault. At this time, both the first relay 60 and the second relay 61 are faulty.

[0063] In step S7, relay fault information is output according to actual conditions. For example, if the first relay contact has a adhesion fault, the first relay fault information is output; if both the first relay and the second relay contact have a adhesion fault, the first relay and the second relay fault information are output; wherein, the relay fault information includes the number of the faulty relay, the fault type, and the number of faults.

[0064] By adopting the above technical solution, the controller 50 for controlling the lifting and lowering of the furnace cover of the electric furnace and the stop valve 51 for controlling the parking of the furnace cover of the electric furnace are combined with the first relay 60 and the second relay 61. Under normal circumstances, when the furnace cover controller 50 does not output a signal, the first relay 60 should not output a signal; if the furnace cover controller 50 does not output a signal, but the first relay 60 does output a signal, it is determined that the first relay 60 that outputs the signal has a sticking fault, and then the first relay 60 is disconnected by de-energizing the second relay 61, and then the stop valve 51 is closed to prevent the furnace cover from descending and expanding the fault, and a relay fault information prompt is issued to the operator through the control panel 52 of the electric furnace, reminding the operator to replace the first relay 60 in time;

[0065] At the same time, it is determined whether the second relay 61 outputs a signal. If the second relay 61 outputs a signal, it is determined that the second relay 61 that outputs the signal has an adhesion fault. At this time, since both the first relay 60 and the second relay 61 have adhesion faults, the only option is to send a relay fault information prompt to the operator through the control panel 52 of the electric furnace to remind the operator to replace it in time or leave the electric furnace area in time.

[0066] refer to Figure 2 As shown, the method for determining whether the first relay 60 outputs the first signal or whether the second relay 61 outputs the second signal is:

[0067] Step S20: Calculating the signal output time of the first relay 60 or the second relay 61;

[0068] Step S21: determining whether the signal output time of the first relay 60 or the second relay 61 exceeds a preset output time;

[0069] Step S22: If yes, the first relay 60 or the second relay 61 is judged as a sticking fault and relay fault information is output; if not, return to step S20, recalculate the signal output time of the first relay 60 or the second relay 61, and output relay alarm information at the same time.

[0070] In step S20 , if the first relay 60 outputs a signal, the signal output time of the first relay 60 is calculated; if the second relay 61 outputs a signal, the signal output time of the second relay 61 is calculated.

[0071] In step S21, determine whether the preset output time is exceeded based on the signal output time of the first relay 60 or the signal output time of the second relay 61; if the preset output time is exceeded, execute step S22; if the preset output time is not exceeded, return to step S20 and recalculate the signal output time of the first relay 60 or the second relay 61; and execute step S210 at the same time: output relay alarm information to remind the operator: there is a signal output delay in the first relay 60 or the second relay 61, and there is a possibility of adhesion problem, so check and deal with it in time; the preset output time is set by the operator according to production requirements, and in this embodiment, it is 1 second to 5 seconds.

[0072] In step S22, if the signal output of the first relay 60 or the second relay 61 exceeds the preset output time, the first relay 60 or the second relay 61 is judged as a contact adhesion fault, and relay fault information is output to remind the operator to replace the faulty relay in time or leave the electric furnace area in time.

[0073] refer to Figure 3 As shown in the figure, the method of outputting relay fault information is:

[0074] Step S70: Outputting the fault relay number and fault type to the control panel 52;

[0075] Step S71: The control panel 52 displays the number of the faulty relay and the fault problem.

[0076] In step S70, when outputting relay fault information to the control panel 52 of the electric furnace, the faulty relay number and fault type are output to the control panel 52. If the first relay 60 fails, the number and fault type of the faulty first relay 60 are output. If the first relay 60 and the second relay 61 fail, the numbers and fault types of the faulty first relay 60 and the second relay 61 are output.

[0077] In step S71 , after receiving the faulty relay number and the fault type, the control panel 52 displays the faulty relay number and the fault type to remind the operator.

[0078] Example 2

[0079] refer to Figure 4-5As shown, this embodiment is basically the same as the first embodiment, except that, in this embodiment, when the first relay 60 is determined to have a adhesion fault, the method further includes the following steps:

[0080] Step S400: disconnecting / opening the first relay 60 from the power supply for a preset number of times;

[0081] Step S401: determining whether the first relay 60 outputs a signal;

[0082] Step S402 : If yes, the first relay 60 is determined to be a sticking fault, a cutoff signal is output to the second relay 61 , and first fault information of the first relay 60 is output.

[0083] In step S400, after the first relay 60 is determined to have a sticking fault, the first relay 60 is immediately disconnected from the power supply / opened a preset number of times; the preset number of times is set by the operator, and in this embodiment, 1 to 5 times are referenced.

[0084] In step S401, after the first relay 60 is switched a preset number of times, it is determined whether the first relay 60 outputs a signal, that is, it is determined whether the first relay 60 still has a contact fault after repeated switching the preset number of times; if the first relay 60 outputs a signal, step S403 is executed; if the first relay 60 does not output a signal, step S4010 is executed: the second fault information of the first relay 60 is output, wherein the second fault information is to remind the operator: the first relay 60 may have a contact adhesion fault, and it should be checked and handled in time.

[0085] In step S402, if the first relay 60 still has a contact adhesion fault, the first relay 60 is judged as a contact adhesion fault, and a cut-off signal is output to the second relay 61. The second relay 61 is used to cut off the first relay 60, and then the stop valve 51 is cut off to prevent the furnace cover from descending and expanding the fault, and a first fault information prompt is sent to the operator through the control panel 52 of the electric furnace, wherein the first fault information is to remind the operator: the first relay 60 has a definite contact adhesion fault, and the first relay 60 should be replaced in time.

[0086] refer to Figure 5 As shown, when the second relay 61 is determined to have a sticking fault, the method further includes the following steps:

[0087] Step S600: disconnecting / opening the second relay 61 from the power supply for a preset number of times;

[0088] Step S601: determining whether the second relay 61 outputs a signal;

[0089] Step S602 : If yes, the second relay 61 is determined to be in a sticking fault, and third fault information of the second relay 61 is output.

[0090] In step S600, after the second relay 61 is determined to have a sticking fault, the second relay 61 is immediately disconnected from the power supply / opened a preset number of times; the preset number of times is set by the operator, and in this embodiment, 1 to 5 times are referenced.

[0091] In step S601, after the second relay 61 is switched a preset number of times, it is determined whether the second relay 61 outputs a signal, that is, it is determined whether the second relay 61 still has a contact sticking fault after repeated switching a preset number of times; if the second relay 61 outputs a signal, step S603 is executed; if the second relay 61 does not output a signal, step S6010 is executed: the fourth fault information of the second relay 61 is output, wherein the fourth fault information is to remind the operator: the first relay 60 and the second relay 61 may have a contact sticking fault, and it is necessary to check and handle it in time.

[0092] In step S602, if the second relay 61 still has a contact adhesion fault, the second relay 61 is judged as a contact adhesion fault, and a third fault information prompt is directly sent to the operator through the control panel 52 of the electric furnace, wherein the third fault information is to remind the operator: the first relay 60 and the second relay 61 have a definite contact adhesion fault, and the first relay 60 and the second relay 61 should be replaced in time.

[0093] Example 3

[0094] Reference Figure 1-7 As shown, the present invention provides an embodiment of a relay fault automatic release system, using the above-mentioned relay fault automatic release method, including:

[0095] The first judgment module 1 detects the operating parameters of the controller 50 and determines whether the controller 50 outputs a signal based on the operating parameters; if so, it is considered that the relay is working normally and the operating parameters of the controller 50 are continuously detected; if not, it is continuously determined whether the first relay 60 outputs a first signal. If not, it is continuously detected. If so, the first relay 60 is determined to have a adhesion fault and a disconnection signal is output to the second relay 61;

[0096] The second judgment module 2 judges whether the second relay 61 outputs the second signal. If so, the second relay 61 is judged to have a adhesion fault and relay fault information is output; if not, the power supply of the first relay 60 is cut off through the second relay 61 and relay fault information is output;

[0097] The fault display module 4 outputs the fault information or alarm information of the relay.

[0098] The relay fault automatic relief system also includes:

[0099] The electric furnace assembly 5 includes a controller 50, a stop valve 51, and a control panel 52. The controller 50 is used to control the lifting and lowering of the furnace cover of the electric furnace; the stop valve 51 is used to control the parking of the furnace cover of the electric furnace; and the control panel 52 is used to provide visual operation of the electric furnace.

[0100] The relay assembly 6 includes a first relay 60 , a second relay 61 , a third relay 62 and a fourth relay 63 . The first relay 60 , the third relay 62 and the fourth relay 63 are respectively connected to the stop valve 51 , and the second relay 61 is connected to the first relay 60 .

[0101] The controller 50 includes but is not limited to a PLC (Programmable Logic Controller) and a microprogram controller.

[0102] Example 4

[0103] refer to Figure 6-8 As shown, this embodiment is basically the same as the third embodiment, except that, in this embodiment, the steps for determining the failure of the third relay 62 or the fourth relay 63 are as follows:

[0104] Step S100: detecting the operating parameters of the stop valve 51;

[0105] Step S101: judging whether the stop valve 51 outputs a signal based on the operating parameters of the stop valve 51; if not, it is considered that the relay is working normally, and the process returns to step S100 to continue detecting the operating parameters of the stop valve; if yes, proceeding to the next step;

[0106] Step S102: Determine whether the third relay or the fourth relay outputs a signal;

[0107] Step S103: If yes, return to step S100 and continue to detect the operating parameters of the stop valve; if no, determine that the third relay 62 or the fourth relay 63 is broken;

[0108] Step S104: closing the stop valve 51 via the first relay 60 and outputting relay fault information.

[0109] In step S100, the operating parameters of the stop valve 51 are obtained in real time. When the stop valve 51 outputs a signal, it means that the controller 50 controls the furnace cover of the electric furnace to start rising or falling; wherein, the operating parameters of the stop valve 51 include the operating state, input and output signals, and signal output time.

[0110] In step S101, after detecting the operating parameters of the stop valve 51, it is determined whether the stop valve 51 outputs a signal based on the operating parameters of the stop valve 51; if the stop valve 51 does not output a signal, return to step S100 and continue to detect the operating parameters of the stop valve; if the stop valve 51 outputs a signal, execute step S102.

[0111] In step S102, it is determined whether the third relay or the fourth relay outputs a signal based on the operating parameters of the controller 50, that is, if the controller 50 outputs an increasing signal, it is determined whether the third relay 62 outputs a signal; if the controller 50 outputs a decreasing signal, it is determined whether the fourth relay 63 outputs a signal; if the third relay 62 or the fourth relay 63 outputs a signal, it returns to step S100 and continues to detect the operating parameters of the stop valve 51; if the third relay 62 or the fourth relay 63 does not output a signal, step S103 is executed.

[0112] In steps S103 and S104, the third relay 62 or the fourth relay 63 is judged to be a break fault, the stop valve 51 is closed through the first relay 60, and the fault information of the third relay 62 or the fourth relay 63 is output to remind the operator that the third relay 62 or the fourth relay 63 has a contact break fault and to replace the third relay 62 or the fourth relay 63 in time; wherein, the contact break fault refers to the process in which the arc releases a lot of heat in a short time during the closing or opening of the contacts, causing the contacts to melt or vaporize, resulting in welding; wherein, under normal circumstances, when the furnace cover receives an ascending command, the third relay 62 outputs a signal, and when the furnace cover receives a descending command, the fourth relay 63 outputs a signal; when the furnace cover receives an ascending command, the third relay 62 does not output a signal, which indicates that the third relay 62 has a contact break fault, and when the furnace cover receives a descending command, the fourth relay 63 does not output a signal, which indicates that the fourth relay 63 has a contact break fault.

[0113] Example 5

[0114] Reference Figure 1-8 As shown, the present invention provides an embodiment of an electric furnace, including the above-mentioned relay fault automatic release system.

[0115] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0116] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0119] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. Relay fault automatic release system, characterized by: include: The electric furnace assembly includes a controller, a shut-off valve, and a control panel. The controller is used to control the lifting and lowering of the furnace cover of the electric furnace; the shut-off valve is used to control the parking of the furnace cover of the electric furnace; The control panel is used to provide visual operation of the electric furnace; a relay assembly comprising a first relay, a second relay, a third relay, and a fourth relay, wherein the first relay, the third relay, and the fourth relay are respectively connected to the stop valve, and the second relay is connected to the first relay; wherein the third relay is used to control the rise of the furnace cover of the electric furnace, and the fourth relay is used to control the fall of the furnace cover of the electric furnace; The system further comprises: A first judgment module detects operating parameters of the controller; determines whether the controller outputs a signal based on the operating parameters; if so, it is considered that the first relay is working normally and the operating parameters of the controller are continuously detected; if not, it is further determined whether the first relay outputs a first signal; if not, it is further detected; if so, the first relay is determined to have a adhesion fault and a cut-off signal is output to the second relay; a second judgment module, determining whether the second relay outputs a second signal; if so, determining that the second relay has a adhesion fault and outputting relay fault information; if not, cutting off the power supply of the first relay through the second relay and outputting relay fault information; Fault display module, displays relay fault information or alarm information; The steps of determining whether the third relay or the fourth relay is faulty are as follows: Step S100: detecting the operating parameters of the stop valve; Step S101: determining whether the stop valve outputs a signal based on the operating parameters of the stop valve; if not, assuming that the third relay or the fourth relay is operating normally, returning to step S100 to continue detecting the operating parameters of the stop valve; if so, continuing to determine whether the third relay or the fourth relay outputs a signal; if so, returning to step S100 to continue detecting the operating parameters of the stop valve; Step S103: If not, the third relay or the fourth relay is determined to be broken, and the next step is executed; Step S104: closing the stop valve via the first relay and outputting relay fault information.

2. A method for automatically clearing a relay fault, characterized in that: The automatic release system for relay faults according to claim 1 is implemented, comprising the following steps: Step S1: detecting the operating parameters of the controller; Step S2: judging whether the controller outputs a signal according to the operating parameters of the controller; if so, it is considered that the first relay is working normally, and the process returns to step S1 to continue detecting the operating parameters of the controller; if not, executing the next step; Step S3: Determine whether the first relay outputs the first signal. If not, return to step S1 to continue detecting the operating parameters of the controller. If yes, proceed to the next step. Step S4: determining that the first relay has a sticking fault and outputting a cutoff signal to the second relay; Step S5: Determine whether the second relay outputs a second signal; Step S6: If yes, the second relay is judged as having a sticking fault; if not, the power supply of the first relay is cut off through the second relay; Step S7: Output relay fault information.

3. The method for automatically clearing a relay fault according to claim 2, wherein: The operating parameters of the controller include the operating state of the controller, input and output signals, and signal output time.

4. The method for automatically clearing a relay fault according to claim 2, wherein: When it is determined that the first relay outputs the first signal or the second relay outputs the second signal, the following steps are performed: Step S20: Calculating the signal output time of the first relay or the second relay; Step S21: determining whether the signal output time of the first relay or the second relay exceeds a preset output time; Step S22: If yes, the first relay or the second relay is determined to be a sticking fault, and relay fault information is output; if not, return to step S20, recalculate the signal output time of the first relay or the second relay, and output relay alarm information.

5. The method for automatically clearing a relay fault according to claim 2, characterized in that: The method of outputting relay fault information is: Step S70: Outputting the fault relay number and fault type to the control panel; Step S71: The control panel displays the number of the faulty relay and the type of fault.

6. The method for automatically clearing a relay fault according to claim 2, characterized in that: The method for determining that the first relay has a adhesion fault is: Step S400: disconnecting / opening the first relay from the power supply for a preset number of times; Step S401: determining whether the first relay outputs a first signal; Step S402: If yes, the first relay is determined to be a sticking fault, a cut-off signal is output to the second relay, and first fault information of the first relay is output; if no, second fault information of the first relay is output.

7. The method for automatically clearing a relay fault according to claim 2, characterized in that: The method for determining that the second relay has a sticking fault is: Step S600: disconnecting / opening the second relay from the power supply for a preset number of times; Step S601: Determine whether the second relay outputs a signal; Step S602: If yes, the second relay is determined to be a sticking fault, and third fault information of the second relay is output; if no, fourth fault information of the second relay is output.

8. An electric furnace, characterized in that: The invention comprises the automatic release system for relay faults as described in claim 1.

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