A coal blocking linkage cleaning device and method for a screening and crushing area coal drop pipe

Abstract

The application provides a coal falling pipe clogging coal linkage cleaning device and cleaning method, and relates to the technical field of coal falling pipe cleaning devices, which comprises a coal falling pipe monitoring module, a coal falling pipe cleaning module and a control box, the control box is electrically connected with the coal falling pipe monitoring module and the coal falling pipe cleaning module, the coal falling pipe comprises a screen upper coal falling pipe, a coal crusher upper section coal falling pipe, a coal crusher lower end coal falling pipe and a screen lower coal falling pipe. The application is characterized in that a nozzle unit is arranged in each coal falling pipe one by one, high-pressure pulse air is used to dredge the clogging coal in the coal falling pipe, the self-operation monitoring of the screening and crushing equipment is utilized, the nozzle units in different areas are put into operation, and the special structure of the nozzle unit can guarantee that the accumulated coal near the nozzle unit is cleaned at the same time as the internal blocked accumulated coal is impacted when dredging, the dredging speed is improved through symmetrical impact, 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 present application belongs to the technical field of coal chute cleaning device, and particularly relates to a coal chute blocking linkage cleaning device and method in a screening and crushing area. BACKGROUND

[0002] At present, in order to reduce construction cost, crushing and screening of the coal conveying system are often arranged in a centralized manner, which leads to complex flow of raw coal in the area. When the equipment is running, the flow of raw coal is not smooth, which leads to frequent blocking of the coal chute. At present, the methods mainly used for solving the problem include reducing the load of the equipment, reducing the amount of coal, increasing cleaning equipment such as a vibrating device, a dredging air cannon and the frequency of manual cleaning. However, the above methods have the following obvious defects in actual use:

[0003] (1) Reducing the load leads to low efficiency and a large increase in energy consumption of the equipment;

[0004] (2) The effect of the vibrating device is poor, which cannot adapt to serious blocking, and the noise is obvious;

[0005] (3) The air cannon can improve the blocking near the wall in some cases, but cannot dredge when the blocking is serious;

[0006] (4) Manual cleaning has a good effect, but the cleaning time is long, the safety risk is large, and the cost pressure on the enterprise caused by normal cleaning is obvious. SUMMARY

[0007] The present application provides a coal chute blocking linkage cleaning device and method in a screening and crushing area, which can solve at least one of the above technical problems.

[0008] To solve the above technical problems, the present application discloses a coal chute blocking linkage cleaning device in a screening and crushing area, which comprises a coal chute monitoring module, a coal chute cleaning module and a control box, the control box is electrically connected with the coal chute monitoring module and the coal chute cleaning module.

[0009] The coal chute monitoring module is used for monitoring the blocking condition of the coal chute and giving a warning based on the blocking condition of the coal chute, the coal chute cleaning module is used for cleaning the coal chute, and the control box is used for controlling the coal chute cleaning module based on the warning result of the coal chute monitoring module.

[0010] The coal chute comprises an above-screen coal chute, an upper-end coal chute of a coal crusher, a lower-end coal chute of the coal crusher and a below-screen coal chute.

[0011] Preferably, the coal chute monitoring module comprises:

[0012] The coal falling pipe blockage degree evaluation value determination unit is configured to calculate a coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period based on the operating parameter of each coal falling pipe in each monitoring period.

[0013] The coal falling pipe blockage state prediction matrix construction unit is configured to construct a coal falling pipe blockage state prediction matrix of each coal falling pipe based on the coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period.

[0014] The cleaning early warning judgment unit is configured to judge whether to perform cleaning early warning based on the coal falling pipe blockage state prediction matrix of each coal falling pipe.

[0015] Preferably, the coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period is calculated based on the operating parameter of each coal falling pipe in each monitoring period.

[0016] ; wherein, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j-th monitoring period, the coal falling pipe above the screen, the coal falling pipe above the upper section of the coal crusher, the coal falling pipe below the lower section of the coal crusher, and the coal falling pipe below the screen are taken as the 1st coal falling pipe, the 2nd coal falling pipe, the 3rd coal falling pipe, and the 4th coal falling pipe respectively, is the average diameter of the pipeline corresponding to the i-th coal falling pipe in the j-th monitoring period, is the coal falling speed detection value at the inlet of the i-th coal falling pipe in the j-th monitoring period, is the coal falling speed detection value at the outlet of the i-th coal falling pipe in the j-th monitoring period, is the coal falling flow detection value at the inlet of the i-th coal falling pipe in the j-th monitoring period, is the dynamic viscosity of the coal falling, is the pipeline length of the i-th coal falling pipe in the j-th monitoring period.

[0017] Preferably, the coal falling pipe blockage state prediction matrix construction module comprises:

[0018] The matrix element acquisition unit is configured to sort the coal falling pipe blockage degree evaluation value of each coal falling pipe based on time sequence, take the coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period after sorting based on time sequence as the first row element of the matrix, take the difference between the left element of each first row element and the element as the second row element corresponding to the element, set the value of the first element in the second row element to be the same as the value of the last element in the second row element, take the difference between the right element of each first row element and the element as the third row element corresponding to the element, and set the value of the last element in the third row element to be the same as the value of the first element in the third row element.

[0019] a matrix construction unit, configured to construct, based on the first row elements, the second row elements and the third row elements, a coal chute blockage state prediction matrix of each coal chute;

[0020] a coal chute blockage degree evaluation value prediction unit, configured to predict, based on the coal chute blockage state prediction matrix of each coal chute, a coal chute blockage degree evaluation value of a next monitoring period.

[0021] Preferably, the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period is constructed based on the first row elements, the second row elements and the third row elements:

[0022] ; wherein, is the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period, is a coal chute blockage degree evaluation value of the i-th coal chute in the 1st monitoring period, is a coal chute blockage degree evaluation value of the i-th coal chute in the 2nd monitoring period, is a coal chute blockage degree evaluation value of the i-th coal chute in the 3rd monitoring period, is a coal chute blockage degree evaluation value of the i-th coal chute in the j-1-th monitoring period, is a coal chute blockage degree evaluation value of the i-th coal chute in the j-th monitoring period.

[0023] Preferably, based on the coal chute blockage state prediction matrix of each coal chute, it is judged whether to perform a cleaning warning, comprising:

[0024] obtaining an average value of all matrix elements in the third row of the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period, and setting the values in the last column of the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period to be equal to the average value of all matrix elements in the third row, thereby obtaining a new matrix, and taking a product of a rank of the new matrix and the coal chute blockage degree evaluation value of the i-th coal chute in the j-th monitoring period as the coal chute blockage degree evaluation value of the i-th coal chute in the j+1-th monitoring period;

[0025] when the coal chute blockage degree evaluation value of the i-th coal chute in the j+1-th monitoring period is greater than a preset coal chute blockage degree evaluation value, performing a cleaning warning.

[0026] Preferably, the nozzle unit of the coal chute cleaning module is arranged in the upper coal chute, the upper coal chute of the coal crusher, the lower coal chute of the coal crusher and the lower coal chute of the screen, the inlet end and the outlet end of the upper coal chute are respectively provided with an upper belt and a roller screen, the upper coal chute of the coal crusher and the lower coal chute of the screen are arranged at the outlet end of the roller screen, the outlet end of the upper coal chute of the coal crusher is provided with a coal crusher, the lower coal chute of the coal crusher is arranged at the outlet end of the coal crusher, and the lower belt is arranged below the lower coal chute of the coal crusher and the lower coal chute of the screen.

[0027] Preferably, the coal chute cleaning module comprises an air compressor, an air tank, a control box, a pulse valve, a gas pipeline and a nozzle unit, one end of the air tank is communicated with the air compressor, the other end of the air tank is connected with the nozzle unit through the pulse valve, and the control box is electrically connected with the air compressor, the air tank, the pulse valve and the nozzle unit.

[0028] Preferably, the middle part of the nozzle unit is provided with an intermediate cone, the two sides of the intermediate cone are symmetrically provided with a wind cap, and the wind cap is provided with an air outlet.

[0029] A coal chute blocking linkage cleaning method in the screening and crushing area, comprising the following steps:

[0030] Step one, the coal chute monitoring module monitors the upper coal chute, the upper coal chute of the coal crusher, the lower coal chute of the coal crusher and the lower coal chute of the screen, and predicts the coal chute blocking degree evaluation value of the upper coal chute, the upper coal chute of the coal crusher, the lower coal chute of the coal crusher and the lower coal chute of the screen in the next monitoring cycle;

[0031] Step two, the control box judges whether to give a cleaning warning based on the coal chute blocking degree evaluation value of the upper coal chute, the upper coal chute of the coal crusher, the lower coal chute of the coal crusher and the lower coal chute of the screen in the next monitoring cycle, and the coal chute cleaning module works based on the judgment result:

[0032] When the upper coal chute and the upper coal chute of the coal crusher give a cleaning warning at the same time:

[0033] The pulse valve corresponding to the lower coal chute of the coal crusher is opened, and after the dredging seconds, the pulse valve corresponding to the lower coal chute of the screen is opened, and the dredging continues until the cleaning warning signal of the lower coal chute of the coal crusher under the coal crusher disappears, the coal crusher is started, the pulse valve corresponding to the upper coal chute of the coal crusher is opened, and the dredging continues until the cleaning warning signal of the upper coal chute on the roller screen disappears, and finally the pulse valve corresponding to the upper coal chute is opened. After keeping all the pulse valves open for several seconds, the cleaning is completed;

[0034] When only the upper coal chute gives a cleaning warning:

[0035] When the coal chute of the upper section of the coal crusher sends a cleaning warning, open the pulse valve corresponding to the coal chute of the lower section of the coal crusher, and when the cleaning warning signal disappears, start the coal crusher, open the pulse valve corresponding to the coal chute of the upper section of the coal crusher, and start the roller screen; keep for 10 seconds without a cleaning warning signal, and the cleaning is completed.

[0036] When the coal chute of the upper section of the coal crusher sends a cleaning warning, open the pulse valve corresponding to the coal chute of the lower section of the coal crusher, and when the cleaning warning signal disappears, start the coal crusher, open the pulse valve corresponding to the coal chute of the upper section of the coal crusher, and start the roller screen; keep for 10 seconds without a cleaning warning signal, and the cleaning is completed.

[0037] At this time, due to the protection mechanism not allowing the roller screen to run, open the pulse valve corresponding to the coal chute of the lower section of the coal crusher, and when the cleaning warning signal disappears, start the coal crusher, open the pulse valve corresponding to the coal chute of the upper section of the coal crusher, and start the roller screen; keep for 10 seconds without a cleaning warning signal, and the cleaning is completed.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] The present application formulates a targeted cleaning strategy for the coal conveying system, the roller screen and the coal chute blockage problem in the coal crushing section, 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.

[0040] The nozzle units are arranged one by one in each coal chute, the high-pressure pulse air is used to dredge the blocked coal in the coal chute, the self-operation monitoring of the screening and crushing equipment is used, and the nozzle units in different regions are put into operation; when dredging, the special structure of the nozzle unit can ensure that the accumulated coal near the cleaning nozzle unit is impacted while impacting the internal blocked coal, the dredging speed is improved through symmetrical impact, the labor cost is reduced, the operation efficiency of the screening and crushing section is improved, and the cost is reduced.

[0041] The present application realizes accurate monitoring and rapid cleaning of the coal chute blockage, significantly improves the cleaning efficiency, reduces the labor cost, and at the same time, reduces the downtime of the equipment due to coal blockage through automatic control, and improves the operation stability of the screening and crushing section. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0043] Fig. 1 It is a whole structure schematic view of the coal chute blockage linkage cleaning device in the screening and crushing section of the present application;

[0044] Fig. 2 It is a cleaning module schematic view of the coal chute of the present application;

[0045] Fig. 3 It is a nozzle unit structure schematic view of the present application.

[0046] In the figure: 1, upper section belt; 100, air compressor; 101, air storage tank; 102, control box; 103, pulse valve; 104, air conveying pipeline; 2, screen overfall coal pipe; 3, roller screen; 4, coal crusher upper section coal falling pipe; 5, coal crusher; 6, coal crusher lower end coal falling pipe; 7, lower section belt; 8, screen underfall coal pipe; 9, nozzle unit; 10, air outlet; 11, intermediate cone; 12, air cap. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present application will be described herein below with reference to the drawings; it should be understood that the preferred embodiments described herein are intended to describe and explain the present application only, and are not intended to limit the present application.

[0048] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application, which is merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0049] The present application provides the following embodiments

[0050] Embodiment 1

[0051] The embodiment of the present application provides a coal falling pipe cleaning device and method for the coal falling pipe in the screening and crushing area, as shown in the figure, which comprises a coal falling pipe monitoring module, a coal falling pipe cleaning module and a control box 102, the control box 102 is electrically connected with the coal falling pipe monitoring module and the coal falling pipe cleaning module. Figs. 1-3 The coal falling pipe monitoring module is used for monitoring the blocking condition of the coal falling pipe, and the coal falling pipe cleaning module is used for cleaning the coal falling pipe based on the blocking condition of the coal falling pipe, and the control box 102 is used for controlling the working of the coal falling pipe cleaning module based on the warning result of the coal falling pipe monitoring module.

[0052] The coal falling pipe comprises a screen overfall coal pipe 2, a coal crusher upper section coal falling pipe 4, a coal crusher lower end coal falling pipe 6 and a screen underfall coal pipe 8.

[0053] A coal falling pipe cleaning method for the coal falling pipe in the screening and crushing area, comprising the following steps:

[0054] A coal falling pipe cleaning method for the coal falling pipe in the screening and crushing area, comprising the following steps:

[0055] Step one, the coal falling pipe monitoring module monitors the screen falling pipe 2, the upper segment coal falling pipe 4 of the coal crusher, the lower end coal falling pipe 6 of the coal crusher and the screen falling pipe 8, and predicts the coal falling pipe blockage degree evaluation value of the screen falling pipe 2, the upper segment coal falling pipe 4 of the coal crusher, the lower end coal falling pipe 6 of the coal crusher and the screen falling pipe 8 in the next monitoring cycle;

[0056] Step two, the control box 102 judges whether to carry out cleaning warning based on the coal falling pipe blockage degree evaluation value of the screen falling pipe 2, the upper segment coal falling pipe 4 of the coal crusher, the lower end coal falling pipe 6 of the coal crusher and the screen falling pipe 8 in the next monitoring cycle, and the coal falling pipe cleaning module works based on the judgment result:

[0057] When the screen falling pipe 2 and the upper segment coal falling pipe 4 of the coal crusher simultaneously issue the cleaning warning:

[0058] The pulse valve 103 corresponding to the lower end coal falling pipe 6 of the coal crusher is opened, and after 10 seconds of dredging, the pulse valve 103 corresponding to the screen falling pipe 8 is opened, and the dredging is continued until the cleaning warning signal of the lower end coal falling pipe 6 of the coal crusher below the coal crusher 5 disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the upper segment coal falling pipe 4 of the coal crusher is opened, and the dredging is continued until the cleaning warning signal of the screen falling pipe 2 on the roller screen 3 disappears, and finally the pulse valve 103 corresponding to the screen falling pipe 2 is opened, and after 10 seconds of keeping all the pulse valves 103 opened, the cleaning is completed;

[0059] When only the screen falling pipe 2 issues the cleaning warning:

[0060] The pulse valve 103 corresponding to the upper segment coal falling pipe 4 of the coal crusher is opened, and after 10 seconds, the pulse valve 103 corresponding to the screen falling pipe 8 is opened, and after the cleaning warning signal of the screen falling pipe 2 on the roller screen 3 disappears, the roller screen 3 is started, the pulse valve 103 corresponding to the screen falling pipe 2 is opened, and the cleaning is completed after the lower segment belt 7 is kept without coal flow;

[0061] When only the upper segment coal falling pipe 4 of the coal crusher issues the cleaning warning:

[0062] At this time, since the protection mechanism does not allow the roller screen 3 to run, the pulse valve 103 corresponding to the lower end coal falling pipe 6 of the coal crusher is opened, and after the cleaning warning signal disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the upper segment coal falling pipe 4 of the coal crusher is opened, the roller screen 3 is started, and the cleaning is completed after 20 seconds without the cleaning warning signal.

[0063] The working principle and beneficial effects of the above technical solution are as follows: in use, the coal falling pipe monitoring module monitors the screen upper coal falling pipe 2, the coal crusher upper segment coal falling pipe 4, the coal crusher lower end coal falling pipe 6 and the screen lower coal falling pipe 8, and predicts the coal falling pipe blockage degree evaluation value of the screen upper coal falling pipe 2, the coal crusher upper segment coal falling pipe 4, the coal crusher lower end coal falling pipe 6 and the screen lower coal falling pipe 8 in the next monitoring cycle; the control box 102 judges whether to perform cleaning warning based on the coal falling pipe blockage degree evaluation value of the screen upper coal falling pipe 2, the coal crusher upper segment coal falling pipe 4, the coal crusher lower end coal falling pipe 6 and the screen lower coal falling pipe 8 in the next monitoring cycle, and the coal falling pipe cleaning module works based on the judgment result:

[0064] When the screen upper coal falling pipe 2 and the coal crusher upper segment coal falling pipe 4 simultaneously issue the cleaning warning:

[0065] The pulse valve 103 corresponding to the coal crusher lower end coal falling pipe 6 is opened, and after 10 seconds of dredging, the pulse valve 103 corresponding to the screen lower coal falling pipe 8 is opened, and the cleaning warning signal of the coal crusher lower end coal falling pipe 6 below the coal crusher 5 disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the coal crusher upper segment coal falling pipe 4 is opened, and the cleaning warning signal of the screen upper coal falling pipe 2 on the roller screen 3 disappears, and finally the pulse valve 103 corresponding to the screen upper coal falling pipe 2 is opened, and after 10 seconds of keeping all the pulse valves 103 opened, the cleaning is completed;

[0066] When only the screen upper coal falling pipe 2 issues the cleaning warning:

[0067] The pulse valve 103 corresponding to the coal crusher upper segment coal falling pipe 4 is opened, and after 10 seconds, the pulse valve 103 corresponding to the screen lower coal falling pipe 8 is opened, and the cleaning warning signal of the screen upper coal falling pipe 2 on the roller screen 3 disappears, the roller screen 3 is started, the pulse valve 103 corresponding to the screen upper coal falling pipe 2 is opened, and the cleaning is completed after the lower belt 7 is kept without coal flow;

[0068] When only the coal crusher upper segment coal falling pipe 4 issues the cleaning warning:

[0069] At this time, since the protection mechanism does not allow the roller screen 3 to run, the pulse valve 103 corresponding to the coal crusher lower end coal falling pipe 6 is opened, and after the cleaning warning signal disappears, the coal crusher 5 is started, the pulse valve 103 corresponding to the coal crusher upper segment coal falling pipe 4 is opened, the roller screen 3 is started, and the cleaning is completed after 20 seconds without the cleaning warning signal;

[0070] The present application formulates a targeted cleaning strategy for the coal falling pipe blockage problem in the roller screen and coal crusher area of the coal conveying system, 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 cost;

[0071] The nozzle unit 9 is arranged in each coal falling pipe one by one, the coal falling pipe is dredged by high-pressure pulse air, the self-operation monitoring of the screening and crushing equipment is utilized, the nozzle unit 9 in different regions is put into operation, when dredging, the special structure of the nozzle unit 9 can guarantee that the accumulated coal near the nozzle unit 9 is cleaned at the same time as the internal blocked coal is impacted, the dredging speed is improved through symmetrical impact, the labor cost is reduced, the operation efficiency of the screening and crushing section is improved, and the cost is reduced.

[0072] The present application realizes accurate monitoring and rapid cleaning of the coal falling pipe blockage, significantly improves the cleaning efficiency, reduces the labor cost, and at the same time, reduces the downtime of the equipment due to coal blockage through automatic control, and improves the operation stability of the screening and crushing section.

[0073] Embodiment 2

[0074] On the basis of embodiment 1, the coal falling pipe monitoring module comprises:

[0075] A coal falling pipe blockage degree evaluation value determination unit is configured to calculate a coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period based on the operation parameters of each coal falling pipe in each monitoring period.

[0076] A coal falling pipe blockage state prediction matrix construction unit is configured to construct a coal falling pipe blockage state prediction matrix of the corresponding coal falling pipe based on the coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period.

[0077] A cleaning early warning judgment unit is configured to judge whether to perform cleaning early warning based on the coal falling pipe blockage state prediction matrix of each coal falling pipe.

[0078] The working principle and beneficial effects of the above technical solution are as follows: by constructing the blockage state prediction matrix, the prediction of the coal falling pipe blockage trend is realized, early warning and measures are taken, and the equipment failure caused by delayed cleaning is avoided, the predictive maintenance method effectively reduces the coal blockage risk, and the operation reliability of the equipment is improved.

[0079] Embodiment 3

[0080] On the basis of embodiment 2, the coal falling pipe blockage degree evaluation value of each coal falling pipe in each monitoring period is calculated based on the operation parameters of each coal falling pipe in each monitoring period.

[0081] ; wherein, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j-th monitoring period, the coal falling pipe 2 above the screen, the coal falling pipe 4 above the coal crusher, the coal falling pipe 6 below the coal crusher and the coal falling pipe 8 below the screen are taken as the 1st coal falling pipe, the 2nd coal falling pipe, the 3rd coal falling pipe and the 4th coal falling pipe respectively, an average diameter of the pipeline corresponding to the i-th coal drop pipe in the j-th monitoring period, a coal drop speed detection value at the inlet of the i-th coal drop pipe in the j-th monitoring period, a coal drop speed detection value at the outlet of the i-th coal drop pipe in the j-th monitoring period, a coal drop flow detection value at the inlet of the i-th coal drop pipe in the j-th monitoring period, a dynamic viscosity of the coal drop, a pipeline length of the i-th coal drop pipe in the j-th monitoring period.

[0082] The working principle and beneficial effects of the above technical solution are that the calculation formula of the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period comprehensively considers various operating parameters, and can more accurately evaluate the blockage degree of the coal drop pipe. Compared with the traditional method, the embodiment improves the evaluation accuracy and provides a scientific basis for subsequent cleaning.

[0083] Embodiment 4

[0084] Based on the embodiment 3, the coal drop pipe blockage state prediction matrix construction module comprises:

[0085] a matrix element acquisition unit, configured to sort the coal drop pipe blockage degree evaluation value of each coal drop pipe based on time sequence, take the coal drop pipe blockage degree evaluation value of each coal drop pipe in each monitoring period after the sorting based on time sequence as the first row element of the matrix, take the difference between the left element of each first row element and the element as the second row element corresponding to the element, set the value of the first element in the second row element to be the same as the value of the last element in the second row element, take the difference between the right element of each first row element and the element as the third row element corresponding to the element, and set the value of the last element in the third row element to be the same as the value of the first element in the third row element;

[0086] a matrix construction unit, configured to construct the coal drop pipe blockage state prediction matrix of each coal drop pipe based on the first row element, the second row element and the third row element;

[0087] a coal drop pipe blockage degree evaluation value prediction unit, configured 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.

[0088] The working principle and beneficial effects of the above technical solution are that by introducing time sequence analysis, the trend of blockage change can be captured, and the accuracy of blockage prediction is further optimized. This prediction method provides a more reliable reference for subsequent cleaning strategies and helps to improve the cleaning efficiency.

[0089] Embodiment 5

[0090] On the basis of Embodiment 4, based on the first row element, the second row element and the third row element, a coal falling pipe blockage state prediction matrix of the i-th coal falling pipe in the j+1-th monitoring period is constructed:

[0091] ; wherein, is the coal falling pipe blockage state prediction matrix of the i-th coal falling pipe in the j+1-th monitoring period, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the 1st monitoring period, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the 2nd monitoring period, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the 3rd monitoring period, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j-1-th monitoring period, is the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j-th monitoring period.

[0092] The working principle and beneficial effects of the above technical solution are that by dynamically updating the prediction matrix, the continuous tracking of the coal falling pipe blockage trend is realized, and this method can better adapt to the change law of the coal falling pipe blockage, thereby providing timely and effective instructions for the cleaning module.

[0093] Embodiment 6

[0094] On the basis of Embodiment 5, based on the coal falling pipe blockage state prediction matrix of each coal falling pipe, it is judged whether to perform a cleaning warning, comprising:

[0095] An average value of all matrix elements in the third row of the coal falling pipe blockage state prediction matrix of the i-th coal falling pipe in the j+1-th monitoring period is obtained, and the numerical value in the last column of the coal falling pipe blockage state prediction matrix of the i-th coal falling pipe in the j+1-th monitoring period is set to be equal to the average value of all matrix elements in the third row, thereby obtaining a new matrix, and the product of the rank of the new matrix and the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j-th monitoring period is taken as the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j+1-th monitoring period;

[0096] When the coal falling pipe blockage degree evaluation value of the i-th coal falling pipe in the j+1-th monitoring period is greater than a preset coal falling pipe blockage degree evaluation value, a cleaning warning is performed.

[0097] The working principle and beneficial effects of the above technical solution are that the introduction of the coal falling pipe blockage state prediction matrix of each coal falling pipe can identify potential coal blockage risks earlier, so that preventive measures are taken to avoid equipment failure.

[0098] Embodiment 7

[0099] On the basis of embodiment 1, the nozzle unit 9 of the coal chute cleaning module is arranged in the screen upper coal chute 2, the coal crusher upper section coal chute 4, the coal crusher lower end coal chute 6 and the screen lower coal chute 8, the inlet end and the outlet end of the screen upper coal chute 2 are respectively provided with the upper section belt 1 and the roller screen 3, the coal crusher upper section coal chute 4 and the screen lower coal chute 8 are both arranged at the outlet end of the roller screen 3, the coal crusher upper section coal chute 4 is provided with the coal crusher 5 at the outlet end, the coal crusher lower end coal chute 6 is arranged at the outlet end of the coal crusher 5, and the lower section belt 7 is arranged below the coal crusher lower end coal chute 6 and the screen lower coal chute 8.

[0100] Preferably, the middle part of the nozzle unit 9 is provided with the middle cone 11, the middle cone 11 is symmetrically provided with the air cap 12 on both sides, and the air cap 12 is provided with the air outlet 10.

[0101] The working principle and beneficial effects of the above technical scheme are that the unique design of the nozzle unit 9 can ensure uniform distribution of airflow, and the airflow is guided through the middle cone 11 and the air cap 12, thereby improving the cleaning effect, and this structure not only reduces the cleaning blind area, but also reduces the energy consumption in the cleaning process.

[0102] Embodiment 8

[0103] On the basis of embodiment 5, the coal chute cleaning module comprises an air compressor 100, a gas storage tank 101, a control box 102, a pulse valve 103, a gas pipeline 104 and a nozzle unit 9, one end of the gas storage tank 101 is communicated with the air compressor 100, the other end of the gas storage tank 101 is connected with the nozzle unit 9 through the pulse valve 103, and the control box 102 is electrically connected with the air compressor 100, the gas storage tank 101, the pulse valve 103 and the nozzle unit 9.

[0104] The working principle and beneficial effects of the above technical scheme are that the air compressor 100 provides high-pressure air during work, the gas storage tank 101 stores compressed air, the control box 102 controls the opening and closing of the pulse valve 103 according to the cleaning early warning signal of the coal chute monitoring module, thereby realizing automatic control of the cleaning of the coal chute, and the cleaning operation can be completed without manual intervention, which significantly reduces the labor cost and ensures the efficiency and safety of the cleaning work.

[0105] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A coal blockage clearing device for coal chutes in a screening and crushing area, characterized in that: The coal chute monitoring module, the coal chute cleaning module and the control box (102) are electrically connected; The coal chute monitoring module is used for monitoring the blockage of the coal chute and giving a cleaning warning based on the blockage of the coal chute, the coal chute cleaning module is used for cleaning the coal chute, and the control box (102) is used for controlling the coal chute cleaning module to work based on the warning result of the coal chute monitoring module; The coal chute includes an above-screen coal chute (2), an upper coal chute of the coal crusher (4), a lower coal chute of the coal crusher (6) and a below-screen coal chute (8); The coal chute monitoring module includes: The coal chute blockage degree evaluation value determination unit is used for calculating the coal chute blockage degree evaluation value of each coal chute in each monitoring period based on the operating parameters of each coal chute in each monitoring period; The coal chute blockage state prediction matrix construction unit is used for constructing the coal chute blockage state prediction matrix of the corresponding coal chute based on the coal chute blockage degree evaluation value of each coal chute in each monitoring period; The cleaning warning judgment unit is used for judging whether to give a cleaning warning based on the coal chute blockage state prediction matrix of each coal chute; The coal chute blockage degree evaluation value of each coal chute in each monitoring period is calculated based on the operating parameters of each coal chute in each monitoring period: ; wherein, is the coal chute blockage degree evaluation value of the i-th coal chute in the j-th monitoring period, and the screen over coal chute (2), the upper section coal chute of the coal crusher (4), the lower end coal chute of the coal crusher (6) and the screen under coal chute (8) are respectively taken as the 1st coal chute, the 2nd coal chute, the 3rd coal chute and the 4th coal chute, is the average diameter of the pipeline corresponding to the i-th coal chute in the j-th monitoring period, is the coal falling speed detection value at the inlet of the i-th coal chute in the j-th monitoring period, is the coal falling speed detection value at the outlet of the i-th coal chute in the j-th monitoring period, is the coal falling flow detection value at the inlet of the i-th coal chute in the j-th monitoring period, is the dynamic viscosity of the coal falling, is the pipeline length of the i-th coal chute in the j-th monitoring period; The coal chute blockage state prediction matrix construction module includes: The matrix element acquisition unit is used for sorting the coal chute blockage degree evaluation values of each coal chute based on time sequence, taking the coal chute blockage degree evaluation values of each coal chute in each monitoring period after the sorting based on time sequence as the first row elements of the matrix, taking the difference between the left element 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 element to be the same as the value of the last element in the second row element, and taking the difference between the right element 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 element to be the same as the value of the first element in the third row element; The matrix construction unit is used for constructing the coal chute blockage state prediction matrix of each coal chute based on the first row elements, the second row elements and the third row elements; The coal chute blockage degree evaluation value prediction unit is used for predicting the coal chute blockage degree evaluation value of the next monitoring period based on the coal chute blockage state prediction matrix of each coal chute; The coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period is constructed based on the first row elements, the second row elements and the third row elements: wherein, is the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period, is the coal chute blockage degree evaluation value of the i-th coal chute in the 1st monitoring period, is the coal chute blockage degree evaluation value of the i-th coal chute in the 2nd monitoring period, is the coal chute blockage degree evaluation value of the i-th coal chute in the 3rd monitoring period, is the coal chute blockage degree evaluation value of the i-th coal chute in the j-1-th monitoring period, is the coal chute blockage degree evaluation value of the i-th coal chute in the j-th monitoring period; The cleaning warning judgment unit is used for judging whether to give a cleaning warning based on the coal chute blockage state prediction matrix of each coal chute, including: The average value of all matrix elements in the third row of the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period is obtained, and the values in the last column of the coal chute blockage state prediction matrix of the i-th coal chute in the j+1-th monitoring period are all set to be equal to the average value of all matrix elements in the third row, thereby obtaining a new matrix, and the product of the rank of the new matrix and the coal chute blockage degree evaluation value of the i-th coal chute in the j-th monitoring period is taken as the coal chute blockage degree evaluation value of the i-th coal chute in the j+1-th monitoring period. When the coal chute blockage degree evaluation value of the i-th coal chute in the j+1-th monitoring period is greater than the preset coal chute blockage degree evaluation value, a cleaning warning is given.

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

3. The coal blocking linkage cleaning device of a screening and crushing area coal chute according to claim 1, characterized in that: The coal chute cleaning module comprises an air compressor (100), an air tank (101), a control box (102), a pulse valve (103), a gas pipeline (104) and a nozzle unit (9). One end of the air tank (101) is communicated with the air compressor (100). The other end of the air tank (101) is connected with the nozzle unit (9) through the pulse valve (103). The control box (102) is electrically connected with the air compressor (100), the air tank (101), the pulse valve (103) and the nozzle unit (9).

4. The coal blocking linkage cleaning device of a screening and crushing area coal chute according to claim 3, characterized in that: The middle part of the nozzle unit (9) is provided with an intermediate cone (11). The intermediate cone (11) is symmetrically provided with a hood (12) on both sides. The hood (12) is provided with an air outlet (10).

5. A method for cleaning a coal chute by using the coal chute cleaning device according to any one of claims 1-4, characterized in that: The method comprises the following steps: Step one, the coal chute monitoring module monitors the screen upper coal chute (2), the coal crusher upper segment coal chute (4), the coal crusher lower end coal chute (6) and the screen lower coal chute (8), and predicts the coal chute blockage degree evaluation value of the screen upper coal chute (2), the coal crusher upper segment coal chute (4), the coal crusher lower end coal chute (6) and the screen lower coal chute (8) in the next monitoring period; Step two, the control box (102) determines whether to give a cleaning warning based on the coal chute blockage degree evaluation value of the screen upper coal chute (2), the coal crusher upper segment coal chute (4), the coal crusher lower end coal chute (6) and the screen lower coal chute (8) in the next monitoring period, and the coal chute cleaning module works based on the determination result: When the screen upper coal chute (2) and the coal crusher upper segment coal chute (4) give a cleaning warning at the same time: When the coal chute (6) under the coal crusher sends a cleaning warning, open the pulse valve (103) corresponding to the coal chute (6) under the coal crusher, and keep it open for 10 seconds. Then open the pulse valve (103) corresponding to the coal chute (8) under the screen, and keep it open until the cleaning warning signal of the coal chute (6) under the coal crusher disappears. Then start the coal crusher (5), open the pulse valve (103) corresponding to the coal chute (4) above the coal crusher, and keep it open until the cleaning warning signal of the coal chute (2) above the screen disappears. Finally, open the pulse valve (103) corresponding to the coal chute (2) above the screen, and keep all the pulse valves (103) open for 10 seconds. When the cleaning is complete, the cleaning warning signal disappears. When only the coal chute (2) above the screen sends a cleaning warning: Open the pulse valve (103) corresponding to the coal chute (4) above the coal crusher, and keep it open for 10 seconds. Then open the pulse valve (103) corresponding to the coal chute (8) under the screen, and keep it open until the cleaning warning signal of the coal chute (2) above the screen disappears. Then start the roller screen (3), open the pulse valve (103) corresponding to the coal chute (2) above the screen, and keep it open until there is no coal flow in the lower belt (7). When the cleaning is complete, the cleaning warning signal disappears. When only the coal chute (4) above the coal crusher sends a cleaning warning: At this time, due to the protection mechanism, the roller screen (3) cannot be operated. Open the pulse valve (103) corresponding to the coal chute (6) under the coal crusher, and keep it open until the cleaning warning signal disappears. Then start the coal crusher (5), open the pulse valve (103) corresponding to the coal chute (4) above the coal crusher, and start the roller screen (3). Keep it open for 20 seconds without a cleaning warning signal. When the cleaning is complete, the cleaning warning signal disappears.

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