Linkage cleaning device and method for coal blockage of coal falling pipe in screening and crushing area

Abstract

The invention provides a linkage cleaning device and method for coal blockage of a coal drop pipe in a screening area, and relates to the technical field of coal drop pipe cleaning devices.The linkage cleaning device comprises a coal drop pipe monitoring module, a coal drop pipe cleaning module and a control box, and the control box is electrically connected with the coal drop pipe monitoring module and the coal drop pipe cleaning module; and the coal dropping pipe comprises an oversize coal dropping pipe, a coal crusher upper-end coal dropping pipe, a coal crusher lower-end coal dropping pipe and an oversize coal dropping pipe. The nozzle units are correspondingly arranged in the coal falling pipes one by one, blocked coal in the coal falling pipes is dredged through high-pressure pulse air, self-operation monitoring of screening and crushing equipment is utilized, and the nozzle units in different areas are put into operation; the special structure of the nozzle unit can guarantee that accumulated coal in the area nearby the nozzle unit is cleaned, meanwhile, internal blocked accumulated coal is impacted, through symmetrical impact, the dredging speed is increased, the labor cost is reduced, the operation efficiency of the screening and crushing section is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal drop pipe cleaning devices, and in particular relates to a coal drop pipe blocking linkage cleaning device and a cleaning method in a screening and crushing area. Background Art

[0002] At present, in order to reduce construction costs, the crushing and screening of coal transportation systems are often arranged in a centralized manner, resulting in a more complicated flow of raw coal in the area. When the equipment is running, the blockage of the coal drop pipe caused by the poor flow of raw coal often occurs. The current methods used for this are mainly to reduce the equipment load, reduce the amount of coal, increase cleaning equipment such as vibration equipment, dredge air cannons, and increase the frequency of manpower cleaning. In actual use, there are the following obvious defects: (1) Reduced load operation leads to low efficiency and a significant increase in equipment energy consumption; (2) The effect of the vibration equipment is poor, it cannot adapt to the situation of severe blockage, and the noise is obvious; (3) The use of air cannons can improve blockage near the wall in some cases, but it cannot clear severe blockages; (4) Manual cleaning is more effective, but it takes a long time and involves greater safety risks. In addition, routine cleaning puts significant pressure on corporate costs. Summary of the invention

[0003] The present invention provides a device and method for cleaning coal blocked in a coal drop pipe in a screening and crushing area, which are used to solve at least one of the technical problems mentioned above.

[0004] In order to solve the above technical problems, the present invention discloses a coal-blocking linkage cleaning device for a coal-dropping pipe in a screening and crushing area, comprising a coal-dropping pipe monitoring module, a coal-dropping pipe cleaning module and a control box, wherein the control box is electrically connected to the coal-dropping pipe monitoring module and the coal-dropping pipe cleaning module; The coal drop pipe monitoring module is used to monitor the blockage of the coal drop pipe and to issue a cleaning warning based on the blockage of the coal drop pipe. The coal drop pipe cleaning module is used to clean the coal drop pipe. The control box is used to control the operation of the coal drop pipe cleaning module based on the warning result of the coal drop pipe monitoring module. The coal drop pipe includes the coal drop pipe above the screen, the coal drop pipe above the coal crusher, the coal drop pipe at the bottom of the coal crusher and the coal drop pipe below the screen.

[0005] Preferably, the coal drop pipe monitoring module includes: A coal drop pipe blockage degree evaluation value determination unit, used to calculate a coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period based on the operating parameters of each coal drop pipe in each monitoring period; A coal drop pipe blockage state prediction matrix construction unit is used to construct a coal drop pipe blockage state prediction matrix of the corresponding coal drop pipe based on the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period; The cleaning warning judgment unit is used to judge whether to issue a cleaning warning based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

[0006] Preferably, based on the operating parameters of each coal drop pipe in each monitoring period, the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period is calculated: ;in, is the evaluation value of the coal pipe blockage degree of the i-th coal pipe in the j-th monitoring period. The coal pipe above the screen, the coal pipe above the coal crusher, the coal pipe below the coal crusher and the coal pipe below the screen are respectively regarded as the first coal pipe, the second coal pipe, the third coal pipe and the fourth coal pipe. is the average diameter of the pipeline corresponding to the i-th coal drop pipe in the j-th monitoring period, is the coal falling speed detection value at the inlet of the ith coal falling pipe in the jth monitoring period, is the coal falling speed detection value at the outlet of the ith coal falling pipe in the jth monitoring period, is the coal drop flow rate detection value at the inlet of the ith coal drop pipe in the jth monitoring period, is the dynamic viscosity of the falling coal, is the pipeline length of the i-th coal drop pipe in the j-th monitoring period.

[0007] Preferably, the coal drop pipe blockage state prediction matrix construction module includes: A matrix element acquisition unit, used for sorting the coal drop pipe blockage degree assessment values ​​of each coal drop pipe based on a time sequence, using the coal drop pipe blockage degree assessment values ​​of each coal drop pipe in each monitoring period after the time sequence rehearsal as the first row element of the matrix, using the difference between the element on the left side of each first row element and the element as the second row element corresponding to the element, setting the value of the first element in the second row of elements to the same value as the last value in the second row of elements, using the difference between the element on the right side of each first row element and the element as the third row element corresponding to the element, setting the value of the last element in the third row of elements to the same value as the first element in the third row of elements; A matrix construction unit, used for constructing a coal drop pipe blocking state prediction matrix of each coal drop pipe based on the first row elements, the second row elements and the third row elements; The coal drop pipe blockage degree evaluation value prediction unit is used to predict the coal drop pipe blockage degree evaluation value of the next monitoring period based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

[0008] Preferably, based on the elements in the first row, the elements in the second row and the elements in the third row, a coal drop pipe blocking state prediction matrix of the i-th coal drop pipe in the j+1-th monitoring period is constructed: ;in, is the coal pipe blockage state prediction matrix of the i-th coal pipe in the j+1-th monitoring period, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the first monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the second monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the third monitoring cycle, is the evaluation value of the coal pipe blockage degree of the i-th coal pipe in the j-1-th monitoring period, It is the evaluation value of the blockage degree of the coal drop pipe of the i-th coal drop pipe in the j-th monitoring cycle.

[0009] Preferably, judging whether to perform a clearing warning based on the coal drop pipe blockage state prediction matrix of each coal drop pipe includes: Obtain the mean of all matrix elements in the third row of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period, and set the values ​​of the last column of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period to values ​​equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and take the product of the rank of the new matrix and the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the jth monitoring period as the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the j+1th monitoring period; When the coal drop pipe blockage degree assessment value of the i-th coal drop pipe in the j+1-th monitoring cycle is greater than the preset coal drop pipe blockage degree assessment value, a cleaning warning is issued.

[0010] Preferably, the nozzle unit of the coal drop pipe cleaning module is arranged in the coal drop pipe on the screen, the coal drop pipe on the coal crusher, the coal drop pipe at the lower end of the coal crusher and the coal drop pipe under the screen, the inlet end and the outlet end of the coal drop pipe on the screen are respectively provided with an upper belt and a roller screen, the coal drop pipe on the coal crusher and the coal drop pipe under the screen are both arranged at the outlet end of the roller screen, a coal crusher is arranged at the outlet end of the upper coal drop pipe of the coal crusher, the lower coal drop pipe of the coal crusher is arranged at the outlet end of the coal crusher, and the lower belt is arranged below the coal drop pipe at the lower end of the coal crusher and the coal drop pipe under the screen.

[0011] Preferably, the coal pipe cleaning module includes an air compressor, a gas tank, a control box, a pulse valve, a gas pipeline and a nozzle unit. One end of the gas tank is connected to the air compressor, and the other end of the gas tank is connected to the nozzle unit through a pulse valve. The control box is electrically connected to the air compressor, the gas tank, the pulse valve and the nozzle unit.

[0012] Preferably, a middle cone is provided in the middle of the nozzle unit, wind caps are symmetrically provided on both sides of the middle cone, and air outlets are provided on the wind caps.

[0013] A method for cleaning coal blocked coal pipes in a screening and crushing area by linkage, comprising the following steps: Step 1: The coal pipe monitoring module monitors the coal pipe on the screen, the coal pipe on the coal crusher, the coal pipe at the bottom of the coal crusher and the coal pipe under the screen, and predicts the coal pipe blockage evaluation value of the coal pipe on the screen, the coal pipe on the coal crusher, the coal pipe at the bottom of the coal crusher and the coal pipe under the screen in the next monitoring cycle; Step 2: The control box determines whether to issue a cleaning warning based on the evaluation values ​​of the blockage degree of the coal pipes above the screen, the upper coal pipe of the coal crusher, the lower coal pipe of the coal crusher, and the coal pipe below the screen in the next monitoring cycle, and the coal pipe cleaning module works based on the judgment result: When the coal pipe on the screen and the coal pipe on the coal crusher send out cleaning warnings at the same time: Open the pulse valve corresponding to the coal drop pipe at the lower end of the coal crusher, and clear it for seconds. Then open the pulse valve corresponding to the coal drop pipe under the screen, and continue to clear it until the warning signal for clearing the coal drop pipe at the lower end of the coal crusher disappears. Start the coal crusher, open the pulse valve corresponding to the coal drop pipe at the upper end of the coal crusher, and continue to clear it until the warning signal for clearing the coal drop pipe on the roller screen disappears. Finally, open the pulse valve corresponding to the coal drop pipe on the screen, and keep all pulse valves open for seconds, and the cleaning is completed. When only the upper coal drop pipe issues a cleaning warning: Open the pulse valve corresponding to the upper coal pipe of the coal crusher for seconds, then open the pulse valve corresponding to the coal pipe under the screen, wait until the warning signal of cleaning the upper coal pipe on the roller screen disappears, open the roller screen, open the pulse valve corresponding to the upper coal pipe on the screen, and keep it open until there is no coal flow on the lower belt, and the cleaning is completed; When only the upper coal pipe of the coal crusher issues a cleaning warning: At this time, since the protection mechanism does not allow the roller screen to operate, open the pulse valve corresponding to the coal drop pipe at the lower end of the coal crusher. Wait for the cleaning warning signal to disappear, start the coal crusher, open the pulse valve corresponding to the coal drop pipe at the upper end of the coal crusher, start the roller screen, and wait for seconds without a cleaning warning signal, and the cleaning is completed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention aims at the problem of blockage of coal drop pipes in the coal conveying system, roller screen and coal crusher area, formulates a targeted cleaning strategy, and designs a cleaning linkage device to ensure smooth transportation of raw coal in the screening and crushing section, improve transportation efficiency, and reduce labor costs; Nozzle units are arranged in each coal drop pipe one by one, and the blocked coal inside the coal drop pipe is cleared by high-pressure pulse air. The self-operation monitoring of the screening and crushing equipment is utilized to put the nozzle units in different areas into operation. When clearing the coal, the special structure of the nozzle unit can ensure that the coal accumulation in the area near the nozzle unit is cleared while impacting the internal blocked coal accumulation. The symmetrical impact can increase the clearing speed, reduce the labor cost, improve the operation efficiency of the screening and crushing section, and reduce the cost. The present invention realizes accurate monitoring and rapid cleaning of the blockage of the coal drop pipe, significantly improves the cleaning efficiency and reduces the labor cost. At the same time, it reduces the downtime of the equipment due to coal blockage through automatic control and improves the operating stability of the screening and crushing section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the device for cleaning the coal blocked by the coal pipe in the screening and crushing area of ​​the present invention; Figure 2 This is a schematic diagram of a coal drop pipe cleaning module of the present invention; Figure 3 It is a schematic diagram of the nozzle unit structure of the present invention.

[0016] In the figure: 1. upper belt; 100. air compressor; 101. gas storage tank; 102. control box; 103. pulse valve; 104. gas pipeline; 2. coal drop pipe on screen; 3. roller screen; 4. coal drop pipe on top of coal crusher; 5. coal crusher; 6. coal drop pipe at the bottom of coal crusher; 7. lower belt; 8. coal drop pipe under screen; 9. nozzle unit; 10. air outlet; 11. middle cone; 12. wind hood. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a device and method for cleaning coal blocked in a coal pipe in a screening and crushing area. Figure 1-3As shown, it includes a coal drop pipe monitoring module, a coal drop pipe cleaning module and a control box 102, and the control box 102 is electrically connected to the coal drop pipe monitoring module and the coal drop pipe cleaning module; The coal drop pipe monitoring module is used to monitor the blockage of the coal drop pipe and to issue a cleaning warning based on the blockage of the coal drop pipe. The coal drop pipe cleaning module is used to clean the coal drop pipe. The control box 102 is used to control the operation of the coal drop pipe cleaning module based on the warning result of the coal drop pipe monitoring module. The coal dropping pipes include a coal dropping pipe 2 above the screen, a coal dropping pipe 4 above the coal crusher, a coal dropping pipe 6 at the lower end of the coal crusher and a coal dropping pipe 8 below the screen.

[0020] A method for cleaning coal blocked coal pipes in a screening and crushing area by linkage, comprising the following steps: Step 1: The coal pipe monitoring module monitors the coal pipe 2 on the screen, the coal pipe 4 on the upper side of the coal crusher, the coal pipe 6 at the lower end of the coal crusher, and the coal pipe 8 under the screen, and predicts the evaluation value of the coal pipe blockage degree of the coal pipe 2 on the screen, the coal pipe 4 on the upper side of the coal crusher, the coal pipe 6 at the lower end of the coal crusher, and the coal pipe 8 under the screen in the next monitoring cycle; Step 2: The control box 102 determines whether to issue a cleaning warning based on the evaluation values ​​of the blockage degree of the coal pipes 2 on the screen, the upper coal pipe 4 on the coal crusher, the lower coal pipe 6 on the coal crusher, and the coal pipe 8 under the screen in the next monitoring cycle, and the coal pipe cleaning module works based on the judgment result: When the coal drop pipe 2 on the screen and the coal drop pipe 4 on the coal crusher simultaneously issue a cleaning warning: Open the pulse valve 103 corresponding to the coal drop pipe 6 at the lower end of the coal crusher, and after dredging for 10 seconds, open the pulse valve 103 corresponding to the coal drop pipe 8 under the screen, and continue to dredge until the coal drop pipe 6 at the lower end of the coal crusher below the coal crusher 5 disappears when the warning signal for cleaning disappears, start the coal crusher 5, open the pulse valve 103 corresponding to the coal drop pipe 4 at the upper end of the coal crusher, and continue to dredge until the coal drop pipe 2 on the roller screen 3 disappears when the warning signal for cleaning disappears, and finally open the pulse valve 103 corresponding to the coal drop pipe 2 on the screen, and keep all the pulse valves 103 open for 10 seconds, and the cleaning is completed; When only the upper coal drop pipe 2 issues a cleaning warning: Open the pulse valve 103 corresponding to the upper coal pipe 4 of the coal crusher for 10 seconds, then open the pulse valve 103 corresponding to the lower coal pipe 8, wait until the cleaning warning signal of the upper coal pipe 2 on the roller screen 3 disappears, open the roller screen 3, open the pulse valve 103 corresponding to the upper coal pipe 2, and keep it open until there is no coal flow on the lower belt 7, and the cleaning is completed; When only the upper coal pipe 4 of the coal crusher issues a cleaning warning: At this time, since the protection mechanism does not allow the roller screen 3 to operate, the pulse valve 103 corresponding to the coal drop pipe 6 at the lower end of the coal crusher is opened. After the cleaning warning signal disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the coal drop pipe 4 at the upper end of the coal crusher is opened, and the roller screen 3 is started. After 20 seconds without a cleaning warning signal, the cleaning is completed.

[0021] The working principle and beneficial effects of the above technical solution are as follows: when in use, the coal pipe monitoring module monitors the coal pipe 2 on the screen, the coal pipe 4 on the upper section of the coal crusher, the coal pipe 6 at the lower end of the coal crusher and the coal pipe 8 under the screen, and predicts the coal pipe blockage evaluation values ​​of the coal pipe 2 on the screen, the coal pipe 4 on the upper section of the coal crusher, the coal pipe 6 at the lower end of the coal crusher and the coal pipe 8 under the screen in the next monitoring cycle. The control box 102 determines whether to perform a cleaning warning based on the coal pipe 2 on the screen, the coal pipe 4 on the upper section of the coal crusher, the coal pipe 6 at the lower end of the coal crusher and the coal pipe 8 under the screen in the next monitoring cycle. The coal pipe cleaning module works based on the judgment result: When the coal drop pipe 2 on the screen and the coal drop pipe 4 on the coal crusher simultaneously issue a cleaning warning: Open the pulse valve 103 corresponding to the coal drop pipe 6 at the lower end of the coal crusher, and after dredging for 10 seconds, open the pulse valve 103 corresponding to the coal drop pipe 8 under the screen, and continue to dredge until the coal drop pipe 6 at the lower end of the coal crusher below the coal crusher 5 disappears when the warning signal for cleaning disappears, start the coal crusher 5, open the pulse valve 103 corresponding to the coal drop pipe 4 at the upper end of the coal crusher, and continue to dredge until the coal drop pipe 2 on the roller screen 3 disappears when the warning signal for cleaning disappears, and finally open the pulse valve 103 corresponding to the coal drop pipe 2 on the screen, and keep all the pulse valves 103 open for 10 seconds, and the cleaning is completed; When only the upper coal drop pipe 2 issues a cleaning warning: Open the pulse valve 103 corresponding to the upper coal pipe 4 of the coal crusher for 10 seconds, then open the pulse valve 103 corresponding to the lower coal pipe 8, wait until the cleaning warning signal of the upper coal pipe 2 on the roller screen 3 disappears, open the roller screen 3, open the pulse valve 103 corresponding to the upper coal pipe 2, and keep it open until there is no coal flow on the lower belt 7, and the cleaning is completed; When only the upper coal pipe 4 of the coal crusher issues a cleaning warning: At this time, since the protection mechanism does not allow the roller screen 3 to operate, the pulse valve 103 corresponding to the coal drop pipe 6 at the lower end of the coal crusher is opened, and the cleaning warning signal disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the coal drop pipe 4 at the upper end of the coal crusher is opened, and the roller screen 3 is started. There is no cleaning warning signal for 20 seconds, and the cleaning is completed; The present invention aims at the problem of blockage of coal drop pipes in the coal conveying system, roller screen and coal crusher area, formulates a targeted cleaning strategy, and designs a cleaning linkage device to ensure smooth transportation of raw coal in the screening and crushing section, improve transportation efficiency, and reduce labor costs; Nozzle units 9 are arranged in each coal drop pipe one by one, and the blocked coal inside the coal drop pipe is cleared by high-pressure pulse air. The self-operation monitoring of the screening and crushing equipment is utilized to put the nozzle units 9 in different areas into operation. When clearing, the special structure of the nozzle unit 9 can ensure that the coal accumulation in the area near the nozzle unit 9 is cleared while impacting the internal blocked coal accumulation. The symmetrical impact can increase the clearing speed, reduce the labor cost, improve the operation efficiency of the screening and crushing section, and reduce the cost. The present invention realizes accurate monitoring and rapid cleaning of the blockage of the coal drop pipe, significantly improves the cleaning efficiency and reduces the labor cost. At the same time, it reduces the downtime of the equipment due to coal blockage through automatic control and improves the operating stability of the screening and crushing section.

[0022] Example 2 Based on Example 1, the coal drop pipe monitoring module includes: A coal drop pipe blockage degree evaluation value determination unit, used to calculate a coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period based on the operating parameters of each coal drop pipe in each monitoring period; A coal drop pipe blockage state prediction matrix construction unit is used to construct a coal drop pipe blockage state prediction matrix of the corresponding coal drop pipe based on the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period; The cleaning warning judgment unit is used to judge whether to issue a cleaning warning based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

[0023] The working principle and beneficial effects of the above technical solution are as follows: by constructing a blockage status prediction matrix, the blockage trend of the coal drop pipe can be predicted, and early warning and measures can be taken to avoid equipment failure caused by delayed cleaning. This predictive maintenance method effectively reduces the risk of coal blockage and improves the operating reliability of the equipment.

[0024] Example 3 On the basis of Example 2, based on the operating parameters of each coal drop pipe in each monitoring period, the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period is calculated: ;in, is the evaluation value of the coal pipe blockage degree of the i-th coal pipe in the j-th monitoring period. The coal pipe 2 above the screen, the coal pipe 4 above the coal crusher, the coal pipe 6 at the lower end of the coal crusher and the coal pipe 8 below the screen are respectively regarded as the first coal pipe, the second coal pipe, the third coal pipe and the fourth coal pipe. is the average diameter of the pipeline corresponding to the i-th coal drop pipe in the j-th monitoring period, is the coal falling speed detection value at the inlet of the ith coal falling pipe in the jth monitoring period, is the coal falling speed detection value at the outlet of the ith coal falling pipe in the jth monitoring period, is the coal drop flow rate detection value at the inlet of the ith coal drop pipe in the jth monitoring period, is the dynamic viscosity of the falling coal, is the pipeline length of the i-th coal drop pipe in the j-th monitoring period.

[0025] The working principle and beneficial effects of the above technical solution are as follows: the calculation formula for the evaluation value of the blockage degree of each coal pipe in each monitoring period comprehensively considers a variety of operating parameters, and can more accurately evaluate the blockage degree of the coal pipe. Compared with traditional methods, this embodiment improves the evaluation accuracy and provides a scientific basis for subsequent cleaning.

[0026] Example 4 Based on Example 3, the coal drop pipe blockage state prediction matrix construction module includes: A matrix element acquisition unit, used for sorting the coal drop pipe blockage degree assessment values ​​of each coal drop pipe based on a time sequence, using the coal drop pipe blockage degree assessment values ​​of each coal drop pipe in each monitoring period after the time sequence rehearsal as the first row element of the matrix, using the difference between the element on the left side of each first row element and the element as the second row element corresponding to the element, setting the value of the first element in the second row of elements to the same value as the last value in the second row of elements, using the difference between the element on the right side of each first row element and the element as the third row element corresponding to the element, setting the value of the last element in the third row of elements to the same value as the first element in the third row of elements; A matrix construction unit, used for constructing a coal drop pipe blocking state prediction matrix of each coal drop pipe based on the first row elements, the second row elements and the third row elements; The coal drop pipe blockage degree evaluation value prediction unit is used to predict the coal drop pipe blockage degree evaluation value of the next monitoring period based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

[0027] The working principle and beneficial effects of the above technical solution: By introducing time series analysis, the trend of congestion changes can be captured and the accuracy of congestion prediction can be further optimized. This prediction method provides a more reliable reference for subsequent cleaning strategies and helps to improve cleaning efficiency.

[0028] Example 5 On the basis of Example 4, based on the first row elements, the second row elements and the third row elements, a coal drop pipe blockage state prediction matrix of the i-th coal drop pipe in the j+1-th monitoring period is constructed: ;in, is the coal pipe blockage state prediction matrix of the i-th coal pipe in the j+1-th monitoring period, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the first monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the second monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the third monitoring cycle, is the evaluation value of the coal pipe blockage degree of the i-th coal pipe in the j-1-th monitoring period, It is the evaluation value of the blockage degree of the coal drop pipe of the i-th coal drop pipe in the j-th monitoring cycle.

[0029] The working principle and beneficial effects of the above technical solution are: by dynamically updating the prediction matrix, continuous tracking of the blockage trend of the coal drop pipe is achieved. This method can better adapt to the changing law of coal drop pipe blockage and provide timely and effective instructions for the cleaning module.

[0030] Example 6 On the basis of Example 5, based on the coal drop pipe blockage state prediction matrix of each coal drop pipe, judging whether to perform a clearing warning includes: Obtain the mean of all matrix elements in the third row of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period, and set the values ​​of the last column of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period to values ​​equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and take the product of the rank of the new matrix and the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the jth monitoring period as the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the j+1th monitoring period; When the coal drop pipe blockage degree assessment value of the i-th coal drop pipe in the j+1-th monitoring cycle is greater than the preset coal drop pipe blockage degree assessment value, a cleaning warning is issued.

[0031] The working principle and beneficial effects of the above technical solution are as follows: the introduction of the coal chute blockage state prediction matrix of each coal chute can identify potential coal blockage risks earlier, so as to take preventive measures and avoid equipment failure.

[0032] Example 7 On the basis of Example 1, the nozzle unit 9 of the coal drop pipe cleaning module is arranged in the coal drop pipe 2 on the screen, the coal drop pipe 4 on the coal crusher, the coal drop pipe 6 at the lower end of the coal crusher and the coal drop pipe 8 under the screen. The inlet and outlet ends of the coal drop pipe 2 on the screen are respectively provided with an upper belt 1 and a roller screen 3. The coal drop pipe 4 on the coal crusher and the coal drop pipe 8 under the screen are both arranged at the outlet end of the roller screen 3. The outlet end of the upper coal drop pipe 4 of the coal crusher is provided with a coal crusher 5. The coal drop pipe 6 at the lower end of the coal crusher is arranged at the outlet end of the coal crusher 5. The lower belt 7 is arranged below the coal drop pipe 6 at the lower end of the coal crusher and the coal drop pipe 8 under the screen.

[0033] Preferably, a middle cone 11 is provided in the middle of the nozzle unit 9 , wind caps 12 are symmetrically provided on both sides of the middle cone 11 , and air outlets 10 are provided on the wind caps 12 .

[0034] The working principle and beneficial effects of the above technical solution are as follows: the unique design of the nozzle unit 9 can ensure uniform distribution of the airflow, while guiding the airflow through the intermediate cone 11 and the wind hood 12 to improve the cleaning effect. This structure not only reduces the blind spots in cleaning, but also reduces energy consumption during the cleaning process.

[0035] Example 8 On the basis of Example 5, the coal pipe cleaning module includes an air compressor 100, a gas tank 101, a control box 102, a pulse valve 103, a gas pipeline 104 and a nozzle unit 9. One end of the gas tank 101 is connected to the air compressor 100, and the other end of the gas tank 101 is connected to the nozzle unit 9 through the pulse valve 103. The control box 102 is electrically connected to the air compressor 100, the gas tank 101, the pulse valve 103 and the nozzle unit 9.

[0036] The working principle and beneficial effects of the above technical solution are as follows: during operation, the air compressor 100 provides high-pressure air, the air storage tank 101 stores compressed air, and the control box 102 controls the switch of the pulse valve 103 according to the cleaning warning signal of the coal drop pipe monitoring module, thereby realizing automatic control of the coal drop pipe cleaning, and the cleaning operation can be completed without human intervention. This design significantly reduces labor costs while ensuring the efficiency and safety of the cleaning work.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for cleaning coal from a coal pipe in a screening and crushing area, characterized in that: It comprises a coal drop pipe monitoring module, a coal drop pipe cleaning module and a control box (102), wherein the control box (102) is electrically connected to the coal drop pipe monitoring module and the coal drop pipe cleaning module; The coal drop pipe monitoring module is used to monitor the blockage of the coal drop pipe and issue a cleaning warning based on the blockage of the coal drop pipe. The coal drop pipe cleaning module is used to clean the coal drop pipe. The control box (102) is used to control the operation of the coal drop pipe cleaning module based on the warning result of the coal drop pipe monitoring module. The coal dropping pipe comprises a coal dropping pipe (2) above the screen, a coal dropping pipe (4) above the coal crusher, a coal dropping pipe (6) at the lower end of the coal crusher, and a coal dropping pipe (8) below the screen.

2. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 1, characterized in that: The coal pipe monitoring module includes: A coal drop pipe blockage degree evaluation value determination unit, used to calculate a coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period based on the operating parameters of each coal drop pipe in each monitoring period; A coal drop pipe blockage state prediction matrix construction unit is used to construct a coal drop pipe blockage state prediction matrix of the corresponding coal drop pipe based on the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period; The cleaning warning judgment unit is used to judge whether to issue a cleaning warning based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

3. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 2, characterized in that: Based on the operating parameters of each coal drop pipe in each monitoring period, the coal drop pipe blockage evaluation value of each coal drop pipe in each monitoring period is calculated: ;in, is the evaluation value of the coal drop pipe blockage degree of the i-th coal drop pipe in the j-th monitoring period, and the coal drop pipe above the screen (2), the coal drop pipe above the coal crusher (4), the coal drop pipe below the coal crusher (6) and the coal drop pipe below the screen (8) are respectively regarded as the first coal drop pipe, the second coal drop pipe, the third coal drop pipe and the fourth coal drop pipe, is the average diameter of the pipeline corresponding to the i-th coal drop pipe in the j-th monitoring period, is the coal falling speed detection value at the inlet of the ith coal falling pipe in the jth monitoring period, is the coal falling speed detection value at the outlet of the ith coal falling pipe in the jth monitoring period, is the coal drop flow rate detection value at the inlet of the ith coal drop pipe in the jth monitoring period, is the dynamic viscosity of the falling coal, is the pipeline length of the i-th coal drop pipe in the j-th monitoring period.

4. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 3 is characterized by: The coal pipe blockage state prediction matrix building modules include: A matrix element acquisition unit, used for sorting the coal drop pipe blockage degree assessment values ​​of each coal drop pipe based on a time sequence, using the coal drop pipe blockage degree assessment values ​​of each coal drop pipe in each monitoring period after the time sequence rehearsal as the first row element of the matrix, using the difference between the element on the left side of each first row element and the element as the second row element corresponding to the element, setting the value of the first element in the second row of elements to the same value as the last value in the second row of elements, using the difference between the element on the right side of each first row element and the element as the third row element corresponding to the element, setting the value of the last element in the third row of elements to the same value as the first element in the third row of elements; A matrix construction unit, used for constructing a coal drop pipe blocking state prediction matrix of each coal drop pipe based on the first row elements, the second row elements and the third row elements; The coal drop pipe blockage degree evaluation value prediction unit is used to predict the coal drop pipe blockage degree evaluation value of the next monitoring period based on the coal drop pipe blockage state prediction matrix of each coal drop pipe.

5. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 4, characterized in that: Based on the elements in the first row, the second row and the third row, the coal drop pipe blockage state prediction matrix of the i-th coal drop pipe in the j+1-th monitoring period is constructed: ;in, is the coal pipe blockage state prediction matrix of the i-th coal pipe in the j+1-th monitoring period, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the first monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the second monitoring cycle, is the evaluation value of the coal drop pipe blockage degree of the ith coal drop pipe in the third monitoring cycle, is the evaluation value of the coal pipe blockage degree of the i-th coal pipe in the j-1-th monitoring period, It is the evaluation value of the blockage degree of the coal drop pipe of the i-th coal drop pipe in the j-th monitoring cycle.

6. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 5, characterized in that: Based on the coal drop pipe blockage state prediction matrix of each coal drop pipe, it is determined whether to perform a clearing warning, including: Obtain the mean of all matrix elements in the third row of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period, and set the values ​​of the last column of the coal drop pipe blockage state prediction matrix of the ith coal drop pipe in the j+1th monitoring period to values ​​equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and take the product of the rank of the new matrix and the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the jth monitoring period as the coal drop pipe blockage degree assessment value of the ith coal drop pipe in the j+1th monitoring period; When the coal drop pipe blockage degree assessment value of the i-th coal drop pipe in the j+1-th monitoring cycle is greater than the preset coal drop pipe blockage degree assessment value, a cleaning warning is issued.

7. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 1, characterized in that: The nozzle unit (9) of the coal drop pipe cleaning module is arranged in the coal drop pipe (2) on the screen, the coal drop pipe (4) on the upper part of the coal crusher, the coal drop pipe (6) at the lower end of the coal crusher, and the coal drop pipe (8) below the screen. The inlet end and the outlet end of the coal drop pipe (2) on the screen are respectively provided with an upper belt (1) and a roller screen (3). The coal drop pipe (4) on the upper part of the coal crusher and the coal drop pipe (8) below the screen are both arranged at the outlet end of the roller screen (3). The outlet end of the coal drop pipe (4) on the upper part of the coal crusher is provided with a coal crusher (5). The coal drop pipe (6) at the lower end of the coal crusher is arranged at the outlet end of the coal crusher (5). The lower belt (7) is arranged below the coal drop pipe (6) at the lower end of the coal crusher and the coal drop pipe (8) below the screen.

8. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 1, characterized in that: The coal drop pipe cleaning module comprises an air compressor (100), an air storage tank (101), a control box (102), a pulse valve (103), a gas transmission pipeline (104) and a nozzle unit (9); one end of the air storage tank (101) is in communication with the air compressor (100); the other end of the air storage tank (101) is connected to the nozzle unit (9) via the pulse valve (103); and the control box (102) is electrically connected to the air compressor (100), the air storage tank (101), the pulse valve (103) and the nozzle unit (9).

9. The device for cleaning coal blocked by coal pipe in screening and crushing area according to claim 7, characterized in that: An intermediate cone (11) is provided in the middle of the nozzle unit (9), wind caps (12) are symmetrically provided on both sides of the intermediate cone (11), and an air outlet (10) is provided on the wind cap (12).

10. A method for cleaning a coal-blocked coal pipe in a screening and crushing area by linkage, which is used to clean a coal pipe by using a device for cleaning a coal-blocked coal pipe in a screening and crushing area as claimed in any one of claims 1 to 9, characterized in that: The steps include: Step 1: The coal drop pipe monitoring module monitors the coal drop pipe (2) on the screen, the coal drop pipe (4) on the upper side of the coal crusher, the coal drop pipe (6) at the lower end of the coal crusher, and the coal drop pipe (8) below the screen, and predicts the coal drop pipe blockage evaluation values ​​of the coal drop pipe (2) on the screen, the coal drop pipe (4) on the upper side of the coal crusher, the coal drop pipe (6) at the lower end of the coal crusher, and the coal drop pipe (8) below the screen in the next monitoring cycle; Step 2: The control box (102) determines whether to issue a cleaning warning based on the evaluation values ​​of the blockage degree of the coal drop pipes (2) above the screen, the coal drop pipe (4) above the coal crusher, the coal drop pipe (6) at the lower end of the coal crusher, and the coal drop pipe (8) below the screen in the next monitoring cycle, and the coal drop pipe cleaning module operates based on the judgment result: When the coal drop pipe (2) on the screen and the coal drop pipe (4) on the coal crusher simultaneously issue a cleaning warning: Open the pulse valve (103) corresponding to the coal drop pipe (6) at the lower end of the coal crusher, and after unblocking for 10 seconds, open the pulse valve (103) corresponding to the coal drop pipe (8) under the screen, and continue to unblock until the coal drop pipe (6) at the lower end of the coal crusher below the coal crusher (5) disappears when the cleaning warning signal disappears, start the coal crusher (5), open the pulse valve (103) corresponding to the coal drop pipe (4) above the coal crusher, and continue to unblock until the coal drop pipe (2) on the roller screen (3) disappears when the cleaning warning signal disappears, and finally open the pulse valve (103) corresponding to the coal drop pipe (2) on the screen, and keep all the pulse valves (103) open for 10 seconds, and then the cleaning is completed; When only the upper coal drop pipe (2) issues a cleaning warning: The pulse valve (103) corresponding to the upper coal pipe (4) of the coal crusher is opened for 10 seconds, and then the pulse valve (103) corresponding to the lower coal pipe (8) is opened. When the cleaning warning signal of the upper coal pipe (2) on the roller screen (3) disappears, the roller screen (3) is opened, and the pulse valve (103) corresponding to the upper coal pipe (2) is opened and kept opened until there is no coal flow on the lower belt (7), and the cleaning is completed; When only the upper coal pipe (4) of the coal crusher issues a cleaning warning: At this time, since the protection mechanism does not allow the roller screen (3) to operate, the pulse valve (103) corresponding to the coal discharge pipe (6) at the lower end of the coal crusher is opened. After the cleaning warning signal disappears, the coal crusher (5) is started, the pulse valve (103) corresponding to the coal discharge pipe (4) at the upper end of the coal crusher is opened, and the roller screen (3) is started. After 20 seconds without the cleaning warning signal, the cleaning is completed.

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