A new type of wind box flue device and method for large sintering machine

Abstract

The present invention discloses a new type of bellows flue device and method for a large-scale sintering machine, and belongs to the technical field of sintering machines. The new type of bellows flue device and method for a large-scale sintering machine of the present invention comprises a sintering main flue and a sintering trolley assembly, wherein a first flow bellows is arranged on one side above the sintering main flue, and there are multiple first flow bellows. In order to solve the problem that the negative pressure and air volume of the two sintering main exhaust fans are different, when certain conditions are met, the airflows of the two main exhaust fans will disturb each other, causing the fan operation to enter a critical point, resulting in irregular fan surge or fan vibration, there are independent exhaust sub-boxes between adjacent trolleys, which can avoid the situation of uneven wind pressure. Through this method, the fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated. Thereby achieving safe and stable operation of the sintering main exhaust fan, avoiding frequent adjustment of the main exhaust fan air door opening, and improving the output and quality of sintered ore.

Description

Technical Field

[0001] The invention relates to the technical field of sintering machines, and in particular to a novel wind box flue device and method for a large sintering machine. Background Art

[0002] With the large-scale modern sintering machine equipment, the sintering machine currently adopts a double exhaust system, equipped with two main exhaust fans and a double flue mode; the left and right bellows at the bottom of each trolley of the sintering machine correspond to the left and right large flues respectively. During the sintering production process, the flue gas of each large flue is filtered and dusted by an electrostatic precipitator, and the flue gas after dust removal enters the corresponding main exhaust fan of the sintering machine. The main exhaust fan is a key equipment for sintering production. It directly affects the output, quality and energy consumption of the sintering machine. It is a key equipment for sintering production. Its function is to form a negative pressure under the sintering machine trolley, continuously inhale air into the sintering combustion zone to make the sintering material burn, and at the same time remove the exhaust gas generated by the combustion. The rotor diameter and rotational inertia of the main exhaust fan are large. If harmful vibration occurs during operation, it will not only break the sliding bearing, but also cause the loosening of the foundation connection bolts, as well as the deformation of the casing and the scrapping of the rotor. Therefore, monitoring the working status of the fan and taking measures to prevent the occurrence of vibration are of great significance to improving the working efficiency of the fan and extending its service life.

[0003] In the existing sintering process, the lower part of the sintering trolley corresponds to a row of bellows, each bellows has two outlets, each outlet is connected to a flue, so each sintering machine has two large flues, and two main exhaust fans are used for exhaust. The air inlet is the material surface of the sintering material on the sintering machine trolley, and the air volume is distributed at the bellows. The two fans independently exhaust air, and the air volume is unevenly distributed. When the air door opening reaches a certain degree, the fan is prone to surge, which is extremely harmful to the safe operation of the main exhaust fan equipment. At the same time, due to vibration, the air door opening is difficult to fully open, resulting in low fan efficiency and energy waste; therefore, it does not meet the existing needs. We propose a new type of bellows flue device and method for large sintering machines. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of wind box flue device and method for a large sintering machine. There are independent exhaust sub-boxes between adjacent trolleys, which can avoid uneven wind pressure. Through this method, the fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated. Thereby, the sintering main exhaust fan can be operated safely and stably, and the frequent adjustment of the main exhaust fan air door opening can be avoided, and the sintering ore output and quality can be improved, which can solve the problems in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a new type of bellows flue device for a large sintering machine, comprising a sintering main flue and a sintering trolley assembly, a first flow bellows is arranged on one side above the sintering main flue, and there are multiple first flow bellows, a second flow bellows is arranged on the other side above the sintering main flue, and there are multiple second flow bellows, the first flow bellows and the second flow bellows are fixedly connected to the sintering main flue, and the sintering trolley assembly is arranged above the first flow bellows and the second flow bellows, a fixing bracket is arranged at the bottom of the sintering main flue, and the fixing bracket is connected to the sintering main flue by bolts, a transfer window is arranged at the top of the first flow bellows and the second flow bellows, and air guide flow chambers are arranged inside the first flow bellows and the second flow bellows, a circulating air chamber is arranged inside the sintering main flue, and the air guide flow chamber is through-connected with the circulating air chamber.

[0006] Preferably, it also includes: a frame building module, a data alignment module, an abnormality rejection module, a model building module, a feature extraction module, a model screening module, a fault judgment module, and a sequence generation module arranged in the first flow bellows and the second flow bellows, and arranged at the inner wall of the air guide cavity and the circulating air cavity and the transfer window;

[0007] The framework building module, sequence generation module, data alignment module, abnormal elimination module model building module, feature extraction module, model screening module, and fault judgment module are connected in sequence;

[0008] The framework building module is used to obtain a first three-dimensional combined model of the sintering main flue and the first flow wind box and a second three-dimensional combined model of the sintering main flue and the second flow wind box, and build a corresponding airflow transfer model based on the three-dimensional combined model, wherein the three-dimensional combined model includes: the first three-dimensional combined model and the second three-dimensional combined model;

[0009] The sequence generation module is used to obtain the first real-time flow value at the preset position of the inner wall of the air guide flow cavity and the inner wall of the circulating air cavity according to a preset period, and generate the first real-time flow value sequence corresponding to the preset position based on the latest acquired multiple first real-time flow values, and at the same time, obtain the second real-time flow value at the transfer window according to the preset period, and generate the second real-time flow value sequence based on the latest acquired multiple second real-time flow values;

[0010] The data alignment module is used to align the first real-time flow value sequence and the second real-time flow value sequence to obtain a first alignment sequence, respectively combine the aligned real-time flow values ​​contained in the first alignment sequence with the airflow transfer model to obtain a plurality of flow change models, align the flow change models, and obtain the alignment results of the corresponding flow bellows, wherein the flow bellows includes: the first flow bellows and the second flow bellows;

[0011] The abnormal elimination module is used to determine the abnormal model in the alignment result, delete the aligned real-time flow value corresponding to the abnormal model in the first alignment sequence, obtain the second alignment sequence, and use the aligned real-time flow values ​​in the second alignment sequence whose number is not less than the number threshold as the qualified aligned real-time flow value of the corresponding flow bellows;

[0012] The model building module is used to fit the first dynamic flow sequence at the corresponding preset position and the second dynamic flow sequence at the switching window based on the real-time flow values ​​included in the qualified aligned real-time flow values, and to build a three-dimensional combined dynamic model of the corresponding flow bellows based on the first dynamic flow sequence and the second dynamic flow sequence and the airflow transfer model;

[0013] The feature extraction module is used to extract data features from the three-dimensional combined dynamic model to obtain first feature data, remove data with the same features as those contained in the first feature data, and obtain second feature data corresponding to the flow bellows;

[0014] The model screening module is used to determine the matching degree between the third characteristic data of each preset flow change model in the preset flow change model library and the second characteristic data, and take the preset flow change model corresponding to the maximum matching degree as the best model of the corresponding flow bellows;

[0015] The fault judgment module is used to read the dynamic data in the corresponding three-dimensional combined dynamic model based on the optimal model cycle, obtain the effective flow change data of the corresponding flow bellows, determine the comprehensive flow curve of the corresponding flow bellows based on the effective flow change data, and judge whether the real-time flow difference between the first flow bellows and the second flow bellows meets the requirements based on the comprehensive flow curve. If so, the judgment result is retained, otherwise, an alarm signal is issued.

[0016] Preferably, the fault judgment module comprises: a data extraction unit, a data alignment unit, a first calculation unit, a second calculation unit, a curve fitting unit, a third calculation unit, and a final judgment unit which are connected in sequence;

[0017] The data extraction unit is used to fit a flow change curve at a preset position based on the effective flow data, and extract a plurality of dynamic flow values ​​from the flow change curve at preset intervals;

[0018] The data alignment unit is used to align the dynamic flow values ​​contained in all flow change curves to obtain alignment data;

[0019] The first calculation unit is used to calculate a first comprehensive deviation rate of the dynamic flow value based on the alignment data;

[0020] The second calculation unit is used to calculate the comprehensive flow value of the corresponding flow bellows at different times based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve;

[0021] The curve fitting unit is used to fit a comprehensive flow curve of the corresponding flow bellows based on the comprehensive flow value;

[0022] The third calculation unit is used to calculate a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows and the comprehensive flow curve of the second flow bellows;

[0023] The final judgment unit is used to determine that the real-time flow difference between the first flow bellows and the second flow bellows meets the requirements and retain the judgment result when the second comprehensive deviation rate does not exceed the deviation rate threshold; otherwise, determine that the real-time flow difference between the first flow bellows and the second flow bellows does not meet the requirements and issue an alarm signal.

[0024] Preferably, both ends of the bottom of the sintering trolley assembly are provided with trolley driving wheel assemblies, and the trolley driving wheel assembly is combined and connected with the sintering trolley assembly, and extension straps are provided above the two ends of the sintering trolley assembly, and the extension straps are connected to the sintering trolley assembly by bolts, and a grate bar assembly is provided inside the sintering trolley assembly, and the grate bar assembly includes a grate bar cross extension and a grate bar plate clamp, the grate bar cross extension is provided above the grate bar plate clamp, and the grate bar cross extension and the grate bar plate clamp are provided as an integrated structure.

[0025] Preferably, the grate plate clamp is connected to the sintering trolley assembly via a clamping slot, and airflow gaps are provided between the grate plate groups. Joint through ribs are provided inside the grate plate groups, and the grate plate groups are connected via joint through ribs.

[0026] Preferably, the sintering trolley assembly includes a trolley body, and a trolley window groove is arranged inside the trolley body, guardrails are arranged at both ends of the trolley body, and the guardrails and the trolley body are arranged as an integrated structure, reinforcing cross ribs are arranged above the trolley window groove, and the reinforcing cross ribs are connected to the trolley body by bolts.

[0027] Preferably, both ends of the bottom of the trolley body are provided with engaging seat grooves, and the bottom of the trolley body is provided with a windshield seat bucket, and the windshield seat bucket is connected to the engaging seat groove by bolts.

[0028] Preferably, a bellows port is provided at the bottom of the wind window seat bucket, and the bellows port is welded to the wind window seat bucket, the bellows port is connected to the first flow bellows and the second flow bellows through a transfer window, and a metal screen is provided inside the bellows port.

[0029] Preferably, a converging wind cavity is provided inside the wind window seat bucket, and a metal partition plate is provided inside the converging wind cavity, the metal partition plate is welded and connected to the wind window seat bucket, and both ends of the wind window seat bucket are provided with, and the transfer strap is connected to the wind window seat bucket by bolts.

[0030] A method for using a new type of wind box flue device for a large sintering machine comprises the following steps:

[0031] Step 1: Place the sintering main flue in the lower area of ​​the sintering machine, align the windshield seat bucket with the bite seat groove structure at the bottom of the sintering trolley assembly for docking and installation. The bottom of each sintering trolley assembly must be assembled;

[0032] Step 2: Then, the sintering trolley assembly equipped with the wind window seat bucket is horizontally arranged above the sintering machine slide rail frame, ensuring that the wind box port at the bottom of the wind window seat bucket coincides with the transfer window at the top of the flow wind box on both sides of the sintering main flue;

[0033] Step 3: The flow wind boxes on both sides are connected to the circulating air chamber inside the sintering main flue. When the sintering trolley assembly moves, the external air enters the corresponding flow wind box through the gap between the grate bar assembly plates on the sintering trolley assembly, and then enters the circulating air chamber;

[0034] Step 4: During the movement of adjacent trolleys, independent flow bellows are used for exhaust, and a single set of sintering main flue is used to achieve efficient and stable exhaust effect.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The present invention is different from the traditional double-flue design and adopts a single-flue design. Two groups of flow bellows are respectively extended on both sides of the sintering main flue, namely the first flow bellows and the second flow bellows. At the same time, the two groups of bellows are arranged alternately with each other. A transfer window is arranged on the top of each flow bellows. The external air enters the air guide flow cavity inside the flow bellows through the transfer window, and finally enters the circulating air cavity of the sintering main flue along the air guide flow cavity. When the sintering trolley assembly passes over the top of the sintering main flue, it will contact the first flow bellows and the second flow bellows in turn during the movement. There are independent exhaust sub-boxes between adjacent trolleys, which can avoid the situation of uneven wind pressure. Through this method, the fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated, so as to achieve safe and stable operation of the sintering main exhaust fan, avoid frequent adjustment of the main exhaust fan air door opening, and improve the sintering ore output and quality;

[0037] 2. In the present invention, the grate bar group plates are provided with joint through-ribs inside, and the grate bar group plates are connected by the joint through-ribs, and the grate bar group plates are fixed by multiple joint through-ribs, and an airflow gap is also provided between adjacent grate bar group plates. When the sintering trolley assembly moves to the top of the wind box, the external air can be drawn into the inside of the wind box with the help of the airflow gap, which can help the ore on the trolley to be sintered;

[0038] 3. In the present invention, the wind window seat is located at the bottom of the sintering trolley assembly, and a sealed connection is achieved between the trolley and the bellows through the wind window seat. During the movement of the trolley, the bellows port at the bottom of the wind window seat will contact the transfer window, which can effectively avoid the diffusion of wind pressure during the exhaust process while achieving air circulation, thereby ensuring the sintering efficiency.

[0039] 4. The present invention realizes a combined model based on each flow bellows and the sintering main flue by setting a framework building module, a sequence generation module, a data alignment module, an abnormality elimination module, a model building module, a feature extraction module, a model screening module, and a fault judgment module, and realizes the elimination of abnormal data in the acquired real-time flow value by combining the real-time flow value at the preset position of the inner wall of the air guide cavity and the circulating air cavity and the transfer window, thereby obtaining an effective flow value change sequence, and then determining the data extraction reference model by matching the feature data in the dynamic data with the feature data in the preset flow change model, so as to make The extracted dynamic data is standardized to ensure the validity of the extracted dynamic data, and then the comprehensive flow curve of the corresponding flow bellows determined based on the extracted dynamic data is used to judge whether the real-time flow difference between the first flow bellows and the second flow bellows meets the requirements, thereby ensuring that the gas flow difference between adjacent flow bellows will not be too large, and further ensuring that there will be no uneven wind pressure. The fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated, so as to achieve safe and stable operation of the sintering main exhaust fan, avoid frequent adjustment of the main exhaust fan air door opening, and improve the output and quality of sintered ore.

[0040] 5. The present invention, by setting a data extraction unit, a data alignment unit, a first calculation unit, a second calculation unit, a curve fitting unit, a third calculation unit, and a final judgment unit, realizes the result of alignment of the flow change curve at the corresponding preset position fitted based on the effective flow data, calculates the first comprehensive deviation rate of the dynamic flow value, and calculates the comprehensive flow value of the corresponding flow bellows at different times based on the first comprehensive deviation rate and all dynamic flow values ​​contained in the corresponding flow change curve, so that the calculated comprehensive flow value is more accurate, thereby ensuring the accuracy of subsequent fault judgment results. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is the overall front view of the present invention;

[0042] Figure 2 This is a schematic diagram of the sintering main flue structure of the present invention;

[0043] Figure 3 It is a schematic diagram of the cross-sectional structure of the sintering main flue of the present invention;

[0044] Figure 4 It is a schematic structural diagram of a sintering trolley assembly of the present invention;

[0045] Figure 5 It is a schematic diagram of the grate bar assembly structure of the present invention;

[0046] Figure 6 It is a schematic diagram of the main structure of the trolley of the present invention;

[0047] Figure 7 It is a schematic diagram of the windshield seat bucket structure of the present invention;

[0048] Figure 8 It is a schematic diagram of the structure of the converging air cavity of the present invention;

[0049] Fig. 9 Schematic diagram of module connection to realize fault detection function;

[0050] Fig.10 This is a schematic diagram of the internal unit connections of the fault judgment module.

[0051] In the figure: 1. Sintering main flue; 2. Sintering trolley assembly; 3. First flow bellows; 4. Second flow bellows; 5. Retention bracket; 6. Grate bar assembly; 7. Trolley driving wheel assembly; 8. Extension board; 9. Wind window seat bucket; 10. Air guide flow cavity; 11. Transfer window; 12. Circulating air cavity; 13. Framework building module; 14. Sequence generation module; 15. Data alignment module; 16. Abnormal rejection module; 17. Model building module; 18. Feature extraction module; 19. Model screening module; 20. Fault judgment module; 2001. Data extraction unit; 2 002, data alignment unit; 2003, first calculation unit; 2004, second calculation unit; 2005, curve fitting unit; 2006, third calculation unit; 2007, final judgment unit; 201, trolley body; 202, reinforcing transverse ribs; 203, guardrails; 204, trolley window slots; 205, bite seat slots; 601, grate bar horizontal extension; 602, grate bar plate; 603, air flow gap; 604, joint through-ribs; 901, bellows port; 902, metal screen; 903, metal partition board; 904, transfer board; 905, converging air cavity. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] See also Figure 1-3, an embodiment of the present invention is: a new type of bellows flue device for a large sintering machine, comprising a sintering main flue 1 and a sintering trolley assembly 2, a first flow wind box 3 is arranged on one side above the sintering main flue 1, and there are multiple first flow wind boxes 3, a second flow wind box 4 is arranged on the other side above the sintering main flue 1, and there are multiple second flow wind boxes 4, the first flow wind box 3 and the second flow wind box 4 are fixedly connected to the sintering main flue 1, and the sintering trolley assembly 2 is arranged above the first flow wind box 3 and the second flow wind box 4, a fixing bracket 5 is arranged at the bottom of the sintering main flue 1, and the fixing bracket 5 is connected to the sintering main flue 1 by bolts, a transfer window 11 is arranged at the top of the first flow wind box 3 and the second flow wind box 4, and an air guide flow cavity 10 is arranged inside the first flow wind box 3 and the second flow wind box 4, a circulating air cavity 12 is arranged inside the sintering main flue 1, and the air guide flow cavity 10 is connected with the circulating air cavity 12, which is different from the traditional double flue design , adopts a single flue design, and two groups of flow bellows are extended on both sides of the sintering main flue 1, namely the first flow bellows 3 and the second flow bellows 4. At the same time, the two groups of bellows are arranged alternately, and a transfer window 11 is arranged on the top of each flow bellows. The external air enters the air guide flow cavity 10 inside the flow bellows through the transfer window 11, and finally enters the circulating air cavity 12 of the sintering main flue 1 along the air guide flow cavity 10. When the sintering trolley assembly 2 passes over the top of the sintering main flue 1, it will contact the first flow bellows 3 and the second flow bellows 4 in turn during the movement. There are independent exhaust sub-boxes between adjacent trolleys, which can avoid uneven wind pressure. Through this method, the fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated, so as to achieve safe and stable operation of the sintering main exhaust fan, avoid frequent adjustment of the main exhaust fan air door opening, and improve the output and quality of sintered ore.

[0054] See also Fig. 9 , further comprising: a frame building module 13, a data alignment module 15, an abnormality elimination module 16, a model building module 17, a feature extraction module 18, a model screening module 19, a fault judgment module 20, and a sequence generation module 14 arranged at the inner wall of the air guide cavity 10 and the circulating air cavity 12 and the transfer window 11;

[0055] The framework building module 13, the sequence generating module 14, the data alignment module 15, the abnormality elimination module 16, the model building module 17, the feature extraction module 18, the model screening module 19, and the fault judgment module 20 are connected in sequence;

[0056] The framework building module 13 is used to obtain a first three-dimensional combined model of the sintering main flue 1 and the first flow wind box 3 and a second three-dimensional combined model of the sintering main flue 1 and the second flow wind box 4, and build a corresponding airflow transfer model based on the three-dimensional combined model, wherein the three-dimensional combined model includes: the first three-dimensional combined model and the second three-dimensional combined model;

[0057] The sequence generation module 14 is used to obtain the first real-time flow value at the preset position of the inner wall of the air guide flow cavity 10 and the inner wall of the circulating air cavity 12 according to a preset period, and generate a first real-time flow value sequence corresponding to the preset position based on the latest acquired multiple first real-time flow values. At the same time, the second real-time flow value at the transfer window 11 is obtained according to the preset period, and the second real-time flow value sequence is generated based on the latest acquired multiple second real-time flow values.

[0058] The data alignment module 15 is used to align the first real-time flow value sequence and the second real-time flow value sequence to obtain a first alignment sequence, respectively combine the aligned real-time flow values ​​contained in the first alignment sequence with the airflow transfer model to obtain a plurality of flow change models, align the flow change models, and obtain the alignment results of the corresponding flow bellows, wherein the flow bellows include: the first flow bellows 3 and the second flow bellows 4;

[0059] The abnormal rejection module 16 is used to determine the abnormal model in the alignment result, delete the aligned real-time flow value corresponding to the abnormal model in the first alignment sequence, obtain the second alignment sequence, and use the aligned real-time flow values ​​in the second alignment sequence whose number is not less than the threshold as the qualified aligned real-time flow value of the corresponding flow bellows;

[0060] The model building module 17 is used to fit the first dynamic flow sequence at the corresponding preset position and the second dynamic flow sequence at the transfer window 11 based on the real-time flow values ​​included in the qualified aligned real-time flow values, and build a three-dimensional combined dynamic model of the corresponding flow bellows based on the first dynamic flow sequence and the second dynamic flow sequence and the airflow transfer model;

[0061] The feature extraction module 18 is used to extract data features from the three-dimensional combined dynamic model to obtain first feature data, remove data with the same features contained in the first feature data, and obtain second feature data corresponding to the flow bellows;

[0062] The model screening module 19 is used to determine the matching degree between the third characteristic data of each preset flow change model in the preset flow change model library and the second characteristic data, and take the preset flow change model corresponding to the maximum matching degree as the best model of the corresponding flow bellows;

[0063] The fault judgment module 20 is used to read the dynamic data in the corresponding three-dimensional combined dynamic model based on the optimal model cycle, obtain the effective flow change data of the corresponding flow bellows, determine the comprehensive flow curve of the corresponding flow bellows based on the effective flow change data, and judge whether the real-time flow difference between the first flow bellows 3 and the second flow bellows 4 meets the requirements based on the comprehensive flow curve. If so, the judgment result is retained, otherwise, an alarm signal is issued.

[0064] In this embodiment, the first three-dimensional combined model is a three-dimensional model of the structure after the sintering main flue 1 and the first flow wind box 3 are combined.

[0065] In this embodiment, the first three-dimensional combined model is a three-dimensional model of the structure after the sintering main flue 1 and the second flow wind box 4 are combined.

[0066] In this embodiment, the airflow transfer model is a model that characterizes the gas flow process and is determined based on the three-dimensional combined model and the flow direction of the airflow in the three-dimensional combined model.

[0067] In this embodiment, the preset period is a preset interval time for obtaining the real-time flow value, for example, 1 second.

[0068] In this embodiment, the first real-time flow value is the real-time flow value at a preset position on the inner wall of the air guide cavity 10 and the circulating air cavity 12 .

[0069] In this embodiment, the preset position is a position predetermined on the inner wall of the air guide cavity 10 and the inner wall of the circulating air cavity 12 for obtaining the real-time flow value.

[0070] In this embodiment, the first real-time flow value sequence is a sequence based on a plurality of first real-time flow values ​​most recently obtained at corresponding preset positions.

[0071] In this embodiment, the second real-time traffic value is the real-time traffic value at the transfer window 11 .

[0072] In this embodiment, the second real-time flow value sequence is a sequence generated based on the most recently obtained plurality of second real-time flow values.

[0073] In this embodiment, the first alignment sequence is an alignment sequence obtained by aligning the first real-time flow value sequence and the second real-time flow value sequence.

[0074] In this embodiment, the aligned real-time flow value is the aligned first real-time flow value and the second real-time flow value included in the first alignment sequence.

[0075] In this embodiment, the flow change model is a model obtained by combining the aligned real-time flow value contained in the first alignment sequence with the airflow transfer model, and represents the flow change process of the gas in the corresponding three-dimensional combined model at the corresponding moment.

[0076] In this embodiment, the alignment result is the result of aligning the flow change models.

[0077] In this embodiment, the abnormal model in the alignment result is determined, that is, based on the flow change model, a gas flow flow change curve is determined, all gas flow flow change curves are aligned based on the alignment result to obtain an alignment curve, a plurality of sampling points are determined in the alignment curve at preset intervals, and the flow value of each sampling point in all gas flow flow change curves is determined, based on the multiple flow values ​​of each sampling point, a flow value sequence corresponding to the sampling point is determined, and the flow change model corresponding to the gas flow flow change curve to which the outliers in all flow value sequences belong is used as the abnormal model.

[0078] In this embodiment, the second alignment sequence is an alignment sequence obtained by deleting the alignment real-time traffic value corresponding to the abnormal model in the first alignment sequence.

[0079] In this embodiment, the number threshold is the minimum consecutive number of preset aligned real-time traffic values ​​corresponding to the time when the aligned real-time traffic values ​​can be screened as qualified aligned real-time traffic values.

[0080] In this embodiment, the qualified alignment real-time traffic value is the alignment real-time traffic value whose number in succession in the second alignment sequence is not less than the number threshold.

[0081] In this embodiment, the first dynamic flow sequence is a flow value sequence at a corresponding preset position fitted based on the real-time flow values ​​included in the qualified aligned real-time flow values.

[0082] In this embodiment, the second dynamic flow sequence is a flow value sequence at the transfer window 11 fitted based on the real-time flow value included in the qualified aligned real-time flow value.

[0083] In this embodiment, the three-dimensional combined dynamic model is a model that is constructed based on the first dynamic flow sequence, the second dynamic flow sequence and the airflow transmission framework to characterize the dynamic flow value of the gas during the flow process when it flows in the corresponding flow bellows.

[0084] In this embodiment, the first feature data is feature data obtained after data feature extraction is performed on the three-dimensional combined dynamic model based on a preset feature extraction method (such as principal component analysis).

[0085] In this embodiment, the second feature data is feature data obtained by eliminating data with the same feature as that contained in the first feature data.

[0086] In this embodiment, the preset flow change model library is a database for storing pre-prepared flow change models.

[0087] In this embodiment, the preset flow change model is a pre-prepared model that characterizes the dynamic flow value of the gas during the flow process when the gas flows in the corresponding three-dimensional combined model.

[0088] In this embodiment, the third characteristic data is characteristic data obtained after extracting characteristics of a preset flow change model based on a preset feature extraction method (such as principal component analysis).

[0089] In this embodiment, determining the matching degree between the third characteristic data of each preset flow change model in the preset flow change model library and the second characteristic data includes:

[0090] Determine a first ratio between the total number of first difference data inconsistent with the second feature data and the total number of data of the third feature data, and at the same time, determine a second ratio between the total number of second difference data inconsistent with the third feature data and the total number of second feature data, and take the difference between 1 and the first ratio and the average of the difference between 1 and the second ratio as the degree of match between the corresponding third feature data and the second feature data.

[0091] In this embodiment, the best model is the preset flow change model corresponding to the maximum matching degree.

[0092] In this embodiment, the dynamic data is the dynamically changing data in the three-dimensional combined dynamic model whose distribution position is consistent with the data in the corresponding optimal model.

[0093] In this embodiment, the effective flow change data is the flow change data (dynamic data) in the three-dimensional combined dynamic model that is consistent with the data distribution position of the corresponding optimal model.

[0094] In this embodiment, the judgment result is a structure for judging whether the real-time flow rates in the first flow bellows 3 and the second flow bellows 4 meet the requirements based on the real-time flow curve.

[0095] In this embodiment, whether the real-time flow in the first flow bellows 3 and the second flow bellows 4 meets the requirements is judged based on the real-time flow curve, that is: whether the gas flow deviation value in the first flow bellows 3 and the second flow bellows 4 is within a preset range is judged, if so, it is determined that the requirements are met, otherwise, it is determined that the requirements are not met.

[0096] In this embodiment, the alarm signal is used to remind the user that the gas flow deviation value in the first flow bellows 3 and the second flow bellows 4 does not meet the requirements, thereby avoiding uneven negative pressure caused by excessive difference in gas flow in adjacent flow bellows.

[0097] The beneficial effects of the above technology are as follows: by setting up a framework building module 13, a sequence generation module 14, a data alignment module 15, an abnormality elimination module 16, a model building module 17, a feature extraction module 18, a model screening module 19, and a fault judgment module 20, a combined model based on each flow bellows and the sintering main flue 1 is realized, and combined with the real-time flow values ​​at the preset positions on the inner walls of the air guide flow cavity 10 and the circulating air cavity 12 and at the transfer window 11, the abnormal data in the acquired real-time flow values ​​are eliminated, and then an effective flow value change sequence is obtained, and then the characteristic data in the dynamic data is matched with the characteristic data in the preset flow change model to determine the flow change sequence. A data extraction reference model is derived, thereby standardizing the extracted dynamic data, ensuring the validity of the extracted dynamic data; and then, based on the comprehensive flow curve of the corresponding flow bellows determined based on the extracted dynamic data, it is judged whether the real-time flow difference between the first flow bellows 3 and the second flow bellows 4 meets the requirements, thereby ensuring that the gas flow difference between adjacent flow bellows will not be too large, and further ensuring that there will be no uneven wind pressure. This can solve the fan vibration problem caused by unstable process control and eliminate the vibration hazard of the main exhaust fan, thereby achieving safe and stable operation of the sintering main exhaust fan, avoiding frequent adjustment of the main exhaust fan air door opening, and improving the output and quality of sintered ore.

[0098] See also Fig.10 The fault judgment module 20 includes: a data extraction unit 2001, a data alignment unit 2002, a first calculation unit 2003, a second calculation unit 2004, a curve fitting unit 2005, a third calculation unit 2006, and a final judgment unit 2007 connected in sequence;

[0099] The data extraction unit 2001 is used to fit a flow change curve at a preset position based on the effective flow data, and extract a plurality of dynamic flow values ​​from the flow change curve at preset intervals;

[0100] The data alignment unit 2002 is used to align the dynamic flow values ​​contained in all flow change curves to obtain alignment data;

[0101] The first calculation unit 2003 is used to calculate a first comprehensive deviation rate of the dynamic flow value based on the alignment data;

[0102] The second calculation unit 2004 is used to calculate the comprehensive flow value of the corresponding flow bellows at different times based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve;

[0103] The curve fitting unit 2005 is used to fit a comprehensive flow curve of the corresponding flow bellows based on the comprehensive flow value;

[0104] The third calculation unit 2006 is used to calculate a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows 3 and the comprehensive flow curve of the second flow bellows 4;

[0105] The final judgment unit 2007 is used to determine that the real-time flow difference between the first flow bellows 3 and the second flow bellows 4 meets the requirements and retain the judgment result when the second comprehensive deviation rate does not exceed the deviation rate threshold; otherwise, it is used to determine that the real-time flow difference between the first flow bellows 3 and the second flow bellows 4 does not meet the requirements and issue an alarm signal.

[0106] In this embodiment, the flow change curve is a curve fitting based on the effective flow data and representing the flow change at the corresponding preset position.

[0107] In this embodiment, the dynamic flow value is the flow value extracted from the flow change curve based on a preset interval.

[0108] In this embodiment, the preset interval is a preset time interval for extracting a dynamic flow value from the flow change curve, for example, 1 second.

[0109] In this embodiment, the alignment data is a plurality of groups of aligned dynamic flow values ​​obtained by performing corresponding alignment processing on the dynamic flow values ​​included in all flow variation curves.

[0110] In this embodiment, calculating the first comprehensive deviation rate of the dynamic flow value based on the alignment data includes:

[0111]

[0112] Where Δα1 is the first comprehensive deviation rate of the dynamic flow value, n is the total number of groups of aligned dynamic flow values ​​contained in the alignment data, i is the i-th group of aligned dynamic flow values ​​contained in the alignment data, and T 1i is the first dynamic flow value in the ith group of aligned dynamic flow values ​​contained in the aligned data, T 2i is the second dynamic flow value in the i-th group of aligned dynamic flow values ​​contained in the aligned data, T 11 is the first dynamic flow value in the first group of aligned dynamic flow values ​​contained in the aligned data, T 21is the second dynamic flow value in the first group of aligned dynamic flow values ​​contained in the alignment data, T 1n is the first dynamic flow value in the nth group of aligned dynamic flow values ​​contained in the alignment data, T 2n is the second dynamic flow value in the nth group of aligned dynamic flow values ​​contained in the alignment data;

[0113] Based on the above formula, the first comprehensive deviation rate of the dynamic flow value can be accurately calculated, thereby ensuring the accuracy of the comprehensive flow value of the flow bellows calculated subsequently.

[0114] In this embodiment, based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve, the comprehensive flow value of the corresponding flow bellows at different times is calculated, including:

[0115] Based on the flow change curve, the real-time flow value at the corresponding preset position at the corresponding time is determined, and based on all the real-time flow values ​​of the corresponding flow bellows at the corresponding time, the comprehensive flow value of the corresponding flow bellows at the corresponding time is calculated:

[0116]

[0117] In the formula, ZL t is the comprehensive flow value of the corresponding flow bellows at time t, m is the total number of all preset positions contained in the corresponding flow bellows, j is the real-time flow value at the jth preset position contained in the corresponding flow bellows, L jt is the real-time flow value at the jth preset position contained in the corresponding flow bellows at time t;

[0118] Based on the above formula, the comprehensive flow value of the corresponding flow bellows at the corresponding time can be accurately calculated.

[0119] In this embodiment, the comprehensive flow curve is a curve obtained by fitting a plurality of comprehensive flow values ​​of the corresponding flow bellows and representing the change of the comprehensive flow in the corresponding flow bellows.

[0120] In this embodiment, calculating the second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows 3 and the comprehensive flow curve of the second flow bellows 4 includes:

[0121] An aligned flow curve is obtained by aligning the integrated flow curve of the first flow bellows 3 and the integrated flow curve of the second flow bellows 4, and a first total number of data points having unequal values ​​at the same position in the integrated flow curve of the first flow bellows 3 and the integrated flow curve of the second flow bellows 4 is determined based on the aligned flow curve, and at the same time, a second total number of data points having unequal values ​​at the same position in the integrated flow curve of the second flow bellows 4 and the integrated flow curve of the first flow bellows 3 is determined;

[0122] Based on the first total, the second total, and the third total of the data points in the integrated flow curve of the first flow bellows 3 and the fourth total of the data points in the integrated flow curve of the second flow bellows 4, a second integrated deviation rate between the integrated flow curve of the first flow bellows 3 and the integrated flow curve of the second flow bellows 4 is calculated:

[0123]

[0124] Wherein, Δα2 is the second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows 3 and the comprehensive flow curve of the second flow bellows 4, s1 is the first total number, s2 is the second total number, s3 is the third total number, and s4 is the fourth total number;

[0125] Based on the above formula, the second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows 3 and the comprehensive flow curve of the second flow bellows 4 can be accurately calculated, providing a data basis for subsequent fault judgment.

[0126] In this embodiment, the deviation rate threshold is a preset maximum second comprehensive deviation rate corresponding to when determining that the real-time flow difference between the first flow bellows 3 and the second flow bellows 4 meets the requirement.

[0127] The beneficial effects of the above technology are as follows: by setting a data extraction unit 2001, a data alignment unit 2002, a first calculation unit 2003, a second calculation unit 2004, a curve fitting unit 2005, a third calculation unit 2006, and a final judgment unit 2007, the alignment result of the flow change curve at the corresponding preset position fitted based on the effective flow data is achieved, the first comprehensive deviation rate of the dynamic flow value is calculated, and based on the first comprehensive deviation rate and all dynamic flow values ​​contained in the corresponding flow change curve, the comprehensive flow value of the corresponding flow bellows at different times is calculated, so that the calculated comprehensive flow value is more accurate, thereby ensuring the accuracy of subsequent fault judgment results.

[0128] See also Figure 4-5Both ends of the bottom of the sintering trolley assembly 2 are provided with trolley driving wheel assemblies 7, and the trolley driving wheel assembly 7 is combined and connected with the sintering trolley assembly 2, and extension straps 8 are provided above the two ends of the sintering trolley assembly 2, and the extension straps 8 are connected with the sintering trolley assembly 2 by bolts, and a grate bar assembly plate 6 is provided inside the sintering trolley assembly 2, and the grate bar assembly plate 6 includes a grate bar horizontal extension 601 and a grate bar plate clamp 602. The grate bar is the main accessory on the sintering machine trolley, and its function is to form a trough-shaped space with the trolley guardrail. The part of the grate bar in contact with the ore is the grate bar horizontal extension 601, and the two ends of the upper part of the grate bar are subjected to force to play a supporting role. The grate bar plate 602 at the bottom of the grate bar can fix the grate bar when the grate bar is turned over for unloading, so that it cannot fall off. Secondly, it plays a supporting role when the top of the grate bar is under pressure, which can effectively prevent the grate bar from bending. The grate bar horizontal extension 601 is arranged above the grate bar plate 602, and the grate bar horizontal extension 601 and the grate bar plate 602 are arranged as an integrated structure. The grate bar plate 602 is connected to the sintering trolley assembly 2 through a slot, and an airflow gap is arranged between the grate bar assembly plates 6. 603, the interior of the grate bar group 6 is provided with a joint through rib 604, and the grate bar group 6 is connected by the joint through rib 604, the grate bar group 6 is fixed by a plurality of joint through ribs 604, and an air flow gap 603 is provided between adjacent grate bar groups 6. When the sintering trolley assembly 2 moves to the top of the bellows, the external air can be drawn into the interior of the bellows with the help of the air flow gap 603, which can help the ore on the trolley to be sintered.

[0129] See also Figure 6-8The sintering trolley assembly 2 includes a trolley body 201, and a trolley window groove 204 is arranged inside the trolley body 201, and guardrails 203 are arranged at both ends of the trolley body 201, and the guardrails 203 and the trolley body 201 are arranged as an integrated structure, and reinforcing transverse ribs 202 are arranged above the trolley window groove 204, and the reinforcing transverse ribs 202 are connected to the trolley body 201 by bolts, and bite seat grooves 205 are arranged at both ends of the bottom of the trolley body 201, and a wind window seat bucket 9 is arranged at the bottom of the trolley body 201, and the wind window seat bucket 9 is connected to the bite seat groove 205 by bolts, and a bellows port 901 is arranged at the bottom of the wind window seat bucket 9, and the bellows port 901 is welded to the wind window seat bucket 9, and the bellows port 901 is connected to the first flow bellows 3 and the second flow bellows The box 4 is connected through the transfer window 11, and a metal screen 902 is arranged inside the bellows port 901, and a converging wind cavity 905 is arranged inside the wind window seat 9, and a metal partition plate 903 is arranged inside the converging wind cavity 905, and the metal partition plate 903 is welded to the wind window seat 9, and both ends of the wind window seat 9 are provided with, and the transfer strap 904 is connected to the wind window seat 9 by bolts, and the wind window seat 9 is located at the bottom of the sintering trolley assembly 2, and the wind window seat 9 is used to achieve a sealed transfer between the trolley and the bellows. During the movement of the trolley, the bellows port 901 at the bottom of the wind window seat 9 will contact with the transfer window 11, which can effectively avoid the diffusion of wind pressure during the exhaust process while realizing air circulation, thereby ensuring the sintering efficiency.

[0130] A method for using a new type of bellows flue device for a large sintering machine is implemented based on the new type of bellows flue device for a large sintering machine according to any one of claims 1 to 9, and comprises the following steps:

[0131] Step 1: Place the sintering main flue 1 in the lower area of ​​the sintering machine, align the windshield seat bucket 9 with the bite seat groove 205 structure at the bottom of the sintering trolley assembly 2 for docking and installation. The bottom of each sintering trolley assembly 2 must be assembled;

[0132] Step 2: Then, the sintering trolley assembly 2 equipped with the wind window seat bucket 9 is horizontally arranged above the sintering machine slide rail frame, ensuring that the wind box port 901 at the bottom of the wind window seat bucket 9 and the transfer window 11 at the top of the flow wind box on both sides of the sintering main flue 1 are matched with each other;

[0133] Step 3: The flow wind boxes on both sides are connected to the circulating air chamber 12 inside the sintering main flue 1. When the sintering trolley assembly 2 moves, the external air enters the corresponding flow wind box through the gap between the grate bar assembly plates 6 on the sintering trolley assembly 2, and then enters the circulating air chamber 12;

[0134] Step 4: During the movement of adjacent trolleys, independent flow bellows are used for exhaust, and a single set of sintering main flue 1 is used to achieve efficient and stable exhaust effect.

[0135] In summary, a single flue design is adopted, and two groups of flow wind boxes are extended on both sides of the sintering main flue 1, namely the first flow wind box 3 and the second flow wind box 4. At the same time, the two groups of wind boxes are arranged alternately, and a transfer window 11 is arranged on the top of each flow wind box. The external air enters the air guide flow cavity 10 inside the flow wind box through the transfer window 11, and finally enters the circulating air cavity 12 of the sintering main flue 1 along the air guide flow cavity 10. When the sintering trolley assembly 2 passes over the top of the sintering main flue 1, it will follow the flow of the air in the process of moving. The first flow wind box 3 and the second flow wind box 4 are contacted for the second time. There are independent exhaust sub-boxes between adjacent trolleys, which can avoid uneven wind pressure. Through this method, the fan vibration problem caused by unstable process control can be solved, and the vibration hazard of the main exhaust fan can be eliminated, so as to achieve safe and stable operation of the sintering main exhaust fan, avoid frequent adjustment of the main exhaust fan air door opening, and improve the sintering ore output and quality. When in use, the sintering main flue 1 is placed in the lower area of ​​the sintering machine, and the wind window seat bucket 9 is aligned with the bite seat groove 205 at the bottom of the sintering trolley assembly 2. The structure is docked and installed. The bottom of each sintering trolley assembly 2 must be assembled. The wind window seat bucket 9 is located at the bottom of the sintering trolley assembly 2. The trolley and the bellows are sealed and transferred through the wind window seat bucket 9. During the movement of the trolley, the bellows port 901 at the bottom of the wind window seat bucket 9 will contact the transfer window 11, which can effectively avoid the diffusion of wind pressure during the exhaust process while achieving air circulation, thereby ensuring the sintering efficiency. Then, the sintering trolley assembly 2 equipped with the wind window seat bucket 9 is horizontally arranged above the sintering machine slide rail frame. Ensure that the bellows port 901 at the bottom of the wind window seat 9 is matched with the transfer window 11 on the top of the flow bellows on both sides of the sintering main flue 1, and the flow bellows on both sides are connected to the circulating air chamber 12 inside the sintering main flue 1. When the sintering trolley assembly 2 moves, the external air enters the corresponding flow bellows through the gap between the grate bar assembly 6 on the sintering trolley assembly 2, and then enters the circulating air chamber 12. During the movement, adjacent trolleys have independent flow bellows for exhaust, and a high-efficiency and stable exhaust effect is achieved through a single group of sintering main flue 1.

[0136] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0137] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-scale sintering machine wind box flue device, comprising a sintering main flue (1) and a sintering trolley assembly (2), characterized in that: A first flow wind box (3) is arranged on one side above the sintering main flue (1), and there are a plurality of first flow wind boxes (3); a second flow wind box (4) is arranged on the other side above the sintering main flue (1), and there are a plurality of second flow wind boxes (4); the first flow wind box (3) and the second flow wind box (4) are fixedly connected to the sintering main flue (1); and a sintering trolley assembly (2) is arranged above the first flow wind box (3) and the second flow wind box (4); and the sintering main flue (1) is provided with a plurality of first flow wind boxes (3). A retaining bracket (5) is provided at the bottom of the sintering main flue (1), and the retaining bracket (5) is connected to the sintering main flue (1) by bolts, a transfer window (11) is provided at the top of the first flow wind box (3) and the second flow wind box (4), and an air guide flow cavity (10) is provided inside the first flow wind box (3) and the second flow wind box (4), and a circulating air cavity (12) is provided inside the sintering main flue (1), and the air guide flow cavity (10) is connected to the circulating air cavity (12); A frame building module (13), a data alignment module (15), an abnormality rejection module (16), a model building module (17), a feature extraction module (18), a model screening module (19), a fault judgment module (20), and a sequence generation module (14) arranged on the inner walls of the air guide cavity (10) and the circulating air cavity (12) and at the transfer window (11) arranged in the first flow bellows (3) and the second flow bellows (4); The framework building module (13), the sequence generating module (14), the data alignment module (15), the abnormality elimination module (16), the model building module (17), the feature extraction module (18), the model screening module (19), and the fault judgment module (20) are connected in sequence; The framework building module (13) is used to obtain a first three-dimensional combined model of the sintering main flue (1) and the first flow wind box (3) and a second three-dimensional combined model of the sintering main flue (1) and the second flow wind box (4), and to build a corresponding airflow transfer model based on the three-dimensional combined model, wherein the three-dimensional combined model includes: the first three-dimensional combined model and the second three-dimensional combined model; The sequence generation module (14) is used to obtain the first real-time flow value at a preset position on the inner wall of the air guide flow cavity (10) and the inner wall of the circulating air cavity (12) according to a preset period, and generate a first real-time flow value sequence corresponding to the preset position based on the latest acquired multiple first real-time flow values; at the same time, obtain the second real-time flow value at the transfer window (11) according to a preset period, and generate a second real-time flow value sequence based on the latest acquired multiple second real-time flow values; The data alignment module (15) is used to align the first real-time flow value sequence and the second real-time flow value sequence to obtain a first aligned sequence, respectively combine the aligned real-time flow values ​​contained in the first aligned sequence with the airflow transfer model to obtain a plurality of flow change models, align the flow change models to obtain an alignment result of the corresponding flow bellows, wherein the flow bellows comprises: the first flow bellows (3) and the second flow bellows (4); The abnormal rejection module (16) is used to determine the abnormal model in the alignment result, delete the alignment real-time flow value corresponding to the abnormal model in the first alignment sequence, obtain a second alignment sequence, and use the alignment real-time flow values ​​in the second alignment sequence whose number is not less than a threshold as qualified alignment real-time flow values ​​of the corresponding flow bellows; The model building module (17) is used to fit a first dynamic flow sequence at a corresponding preset position and a second dynamic flow sequence at the switching window (11) based on the real-time flow values ​​included in the qualified aligned real-time flow values, and to build a three-dimensional combined dynamic model of the corresponding flow bellows based on the first dynamic flow sequence and the second dynamic flow sequence and the airflow transfer model; The feature extraction module (18) is used to extract data features from the three-dimensional combined dynamic model to obtain first feature data, remove data with the same features contained in the first feature data, and obtain second feature data corresponding to the flow bellows; The model screening module (19) is used to determine the degree of match between the third characteristic data of each preset flow change model in the preset flow change model library and the second characteristic data, and to use the preset flow change model corresponding to the maximum degree of match as the best model of the corresponding flow bellows; The fault judgment module (20) is used to read the dynamic data in the corresponding three-dimensional combined dynamic model based on the optimal model cycle, obtain the effective flow change data of the corresponding flow bellows, determine the comprehensive flow curve of the corresponding flow bellows based on the effective flow change data, and judge whether the real-time flow difference between the first flow bellows (3) and the second flow bellows (4) meets the requirements based on the comprehensive flow curve, and if so, retain the judgment result, otherwise, issue an alarm signal; The fault judgment module (20) comprises: a data extraction unit (2001), a data alignment unit (2002), a first calculation unit (2003), a second calculation unit (2004), a curve fitting unit (2005), a third calculation unit (2006), and a final judgment unit (2007) which are connected in sequence; The data extraction unit (2001) is used to fit a flow change curve at a preset position based on effective flow data, and extract a plurality of dynamic flow values ​​from the flow change curve at preset intervals; The data alignment unit (2002) is used to align the dynamic flow values ​​contained in all flow change curves to obtain alignment data; The first calculation unit (2003) is used to calculate a first comprehensive deviation rate of the dynamic flow value based on the alignment data; The second calculation unit (2004) is used to calculate the comprehensive flow value of the corresponding flow bellows at different times based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve; The curve fitting unit (2005) is used to fit a comprehensive flow curve of the corresponding flow bellows based on the comprehensive flow value; The third calculation unit (2006) is used to calculate a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4); The final judgment unit (2007) is used to determine that the real-time flow difference between the first flow bellows (3) and the second flow bellows (4) meets the requirement when the second comprehensive deviation rate does not exceed the deviation rate threshold, and retain the judgment result; otherwise, determine that the real-time flow difference between the first flow bellows (3) and the second flow bellows (4) does not meet the requirement, and issue an alarm signal; The flow change curve is a curve fitting based on the effective flow data and representing the flow change at the corresponding preset position; The dynamic flow value is the flow value extracted from the flow change curve based on the preset interval; The preset interval is a preset time interval for extracting dynamic flow values ​​from the flow change curve; The alignment data is a plurality of groups of aligned dynamic flow values ​​obtained after the dynamic flow values ​​contained in all flow change curves are aligned accordingly; The first comprehensive deviation rate formula 1 of the dynamic flow value is calculated based on the alignment data, including: In formula 1, is the first comprehensive deviation rate of the dynamic flow value, is the total number of groups of aligned dynamic flow values ​​contained in the alignment data, is the dynamic flow value of the ith group of alignment contained in the alignment data, is the first dynamic flow value in the i-th group of aligned dynamic flow values ​​contained in the alignment data, is the second dynamic flow value in the i-th group of aligned dynamic flow values ​​contained in the alignment data, is the first dynamic flow value in the first group of aligned dynamic flow values ​​contained in the alignment data, is the second dynamic flow value in the first group of aligned dynamic flow values ​​contained in the alignment data, The alignment data contains The first dynamic flow value in the group of aligned dynamic flow values, The alignment data contains the second dynamic flow value in the group of aligned dynamic flow values; Calculate the first comprehensive deviation rate of the dynamic flow value based on formula 1; Based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve, the comprehensive flow value of the corresponding flow bellows at different times is calculated, including: Based on the flow change curve, the real-time flow value at the corresponding preset position at the corresponding time is determined. Based on all the real-time flow values ​​of the corresponding flow bellows at the corresponding time, the comprehensive flow value of the corresponding flow bellows at the corresponding time is calculated as follows: In formula 2, For the corresponding flow bellows The comprehensive flow value at the moment, is the total number of all preset positions contained in the corresponding flow bellows, is the real-time flow value at the jth preset position contained in the corresponding flow bellows, The jth preset position of the corresponding flow bellows is Real-time traffic value at the moment; Based on formula 2, the comprehensive flow value of the corresponding flow bellows at the corresponding time is calculated; The comprehensive flow curve is a curve representing the change of the comprehensive flow in the corresponding flow bellows, which is obtained by fitting multiple comprehensive flow values ​​of the corresponding flow bellows; Calculating a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4), comprising: An aligned flow curve is obtained by aligning the integrated flow curve of the first flow bellows (3) and the integrated flow curve of the second flow bellows (4), and based on the aligned flow curve, a first total number of data points in the integrated flow curve of the first flow bellows (3) and the integrated flow curve of the second flow bellows (4) at the same position with unequal values ​​is determined, and at the same time, a second total number of data points in the integrated flow curve of the second flow bellows (4) and the integrated flow curve of the first flow bellows (3) at the same position with unequal values ​​is determined; Based on the first total number, the second total number, the third total number of data points in the comprehensive flow curve of the first flow bellows (3), and the fourth total number of data points in the comprehensive flow curve of the second flow bellows (4), a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4) is calculated: In formula three, is a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4), is the first total, is the second total, For the third total, is the fourth total; Based on Formula 3, a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4) is calculated.

2. A large-scale sintering machine wind box flue device according to claim 1, characterized in that: The fault judgment module (20) comprises: a data extraction unit (2001), a data alignment unit (2002), a first calculation unit (2003), a second calculation unit (2004), a curve fitting unit (2005), a third calculation unit (2006), and a final judgment unit (2007) which are connected in sequence; The data extraction unit (2001) is used to fit a flow change curve at a preset position based on effective flow data, and extract a plurality of dynamic flow values ​​from the flow change curve at preset intervals; The data alignment unit (2002) is used to align the dynamic flow values ​​contained in all flow change curves to obtain alignment data; The first calculation unit (2003) is used to calculate a first comprehensive deviation rate of the dynamic flow value based on the alignment data; The second calculation unit (2004) is used to calculate the comprehensive flow value of the corresponding flow bellows at different times based on the first comprehensive deviation rate and all dynamic flow values ​​included in the corresponding flow change curve; The curve fitting unit (2005) is used to fit a comprehensive flow curve of the corresponding flow bellows based on the comprehensive flow value; The third calculation unit (2006) is used to calculate a second comprehensive deviation rate between the comprehensive flow curve of the first flow bellows (3) and the comprehensive flow curve of the second flow bellows (4); The final judgment unit (2007) is used to determine that the real-time flow difference between the first flow bellows (3) and the second flow bellows (4) meets the requirements when the second comprehensive deviation rate does not exceed the deviation rate threshold, and retain the judgment result; otherwise, determine that the real-time flow difference between the first flow bellows (3) and the second flow bellows (4) does not meet the requirements and issue an alarm signal.

3. A large-scale sintering machine wind box flue device according to claim 1, characterized in that: Both ends of the bottom of the sintering trolley assembly (2) are provided with a trolley driving wheel assembly (7), and the trolley driving wheel assembly (7) is assembled and connected to the sintering trolley assembly (2); an extension strap (8) is provided above both ends of the sintering trolley assembly (2), and the extension strap (8) is connected to the sintering trolley assembly (2) by bolts; a grate bar assembly (6) is provided inside the sintering trolley assembly (2), and the grate bar assembly (6) comprises a grate bar cross extension (601) and a grate bar plate clamp (602); the grate bar cross extension (601) is provided above the grate bar plate clamp (602), and the grate bar cross extension (601) and the grate bar plate clamp (602) are provided as an integrated structure.

4. A large-scale sintering machine wind box flue device according to claim 3, characterized in that: The grate plate clamp (602) is connected to the sintering trolley assembly (2) via a clamping groove, and an airflow gap (603) is provided between the grate plate groups (6). Joint through-ribs (604) are provided inside the grate plate groups (6), and the grate plate groups (6) are connected via the joint through-ribs (604).

5. A large-scale sintering machine wind box flue device according to claim 1, characterized in that: The sintering trolley assembly (2) comprises a trolley body (201), and a trolley window groove (204) is arranged inside the trolley body (201), and guardrails (203) are arranged at both ends of the trolley body (201), and the guardrails (203) and the trolley body (201) are arranged as an integrated structure, and reinforcing transverse ribs (202) are arranged above the trolley window groove (204), and the reinforcing transverse ribs (202) are connected to the trolley body (201) by bolts.

6. A large-scale sintering machine wind box flue device according to claim 5, characterized in that: Both ends of the bottom of the trolley body (201) are provided with engaging seat grooves (205), and the bottom of the trolley body (201) is provided with a windshield seat bucket (9), and the windshield seat bucket (9) is connected to the engaging seat groove (205) by bolts.

7. A large-scale sintering machine wind box flue device according to claim 6, characterized in that: A bellows port (901) is provided at the bottom of the wind window seat (9), and the bellows port (901) is welded to the wind window seat (9), the bellows port (901) is connected to the first flow bellows (3) and the second flow bellows (4) via a transfer window (11), and a metal screen (902) is provided inside the bellows port (901).

8. A large-scale sintering machine wind box flue device according to claim 7, characterized in that: The wind window seat (9) is provided with a converging air cavity (905) inside, and a metal partition plate (903) is provided inside the converging air cavity (905); the metal partition plate (903) is welded to the wind window seat (9); and both ends of the wind window seat (9) are provided with a transfer strap (904) connected to the wind window seat (9) by bolts.

9. A method for using a large-scale sintering machine wind box flue device, which is implemented based on the large-scale sintering machine wind box flue device according to any one of claims 1 to 8, wherein: The steps include: Step 1: placing the sintering main flue (1) in the lower area of ​​the sintering machine, aligning the wind window seat bucket (9) with the engaging seat groove (205) structure at the bottom of the sintering trolley assembly (2) for docking and installation, and the bottom of each sintering trolley assembly (2) must be assembled; Step 2: Then, the sintering trolley assembly (2) equipped with the wind window seat bucket (9) is horizontally arranged above the sintering machine slide rail frame, ensuring that the wind box port (901) at the bottom of the wind window seat bucket (9) and the transfer windows (11) at the top of the flow wind boxes on both sides of the sintering main flue (1) are aligned with each other; Step 3: The flow wind boxes on both sides are connected to the circulating air chamber (12) inside the sintering main flue (1). When the sintering trolley assembly (2) moves, the external air enters the corresponding flow wind box through the gap between the grate bar assembly plates (6) on the sintering trolley assembly (2), and then enters the circulating air chamber (12); Step 4: During the movement of adjacent trolleys, independent flow bellows are used for exhaust, and a single set of sintering main flue (1) is used to achieve efficient and stable exhaust effect.

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