CN111874540B - Mobile tensioning control system and method for displacement belt conveyor - Google Patents
Mobile tensioning control system and method for displacement belt conveyor Download PDFInfo
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- CN111874540B CN111874540B CN202010802420.7A CN202010802420A CN111874540B CN 111874540 B CN111874540 B CN 111874540B CN 202010802420 A CN202010802420 A CN 202010802420A CN 111874540 B CN111874540 B CN 111874540B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention provides a movable tensioning control system and a method for a displacement belt conveyor. The device comprises a belt conveyor electric automation unit and a tail car electric automation unit, wherein the belt conveyor electric automation unit and the tail car electric automation unit are in communication connection through a wireless bus communication module. The belt conveyor electric automation unit comprises a central processing unit, a field signal acquisition controller, an intelligent pull switch, a belt conveyor driving frequency converter, a belt conveyor motor, an industrial bus and first belt scale equipment. The tail car electric automation unit comprises an on-car signal acquisition controller, a tail car travel encoder, an automatic tensioning device and a second belt scale device. According to the invention, the tension value can be adjusted according to the state change of the belt conveyor, so that the running state of the belt conveyor is optimized, the belt tension is reduced, and the service life of the belt is prolonged.
Description
Technical Field
The invention relates to the technical field of strip mine dumping construction, in particular to a movable tensioning control system and method for a displacement belt conveyor.
Background
The connecting belts of the strip mine dumping machine are often movable and long-distance belt conveyors. Because of the inherent characteristics of the belt conveyor which is displaced in the soil discharging process, if the belt conveyor is laid along the ground according to the process requirements, the head station and the tail station cannot be too large, the head station is difficult to use a high-power electric device, the belt conveyor is required to be regularly prolonged or shortened, the belt conveyor is required to be regularly moved, and the like, the method of adopting the heavy hammer tensioning or the method of adopting the head/tail station to fix the tensioning device is difficult to implement.
The field can only adopt a tensioning mode that a fixed tensioning device is arranged on a movable unloading tail car of the belt conveyor. The fixed tensioning device is convenient and practical, but the tension value is selected and fixed according to the least unfavorable working condition in all working conditions in the current tension selecting method. The belt tension of the belt conveyor can be kept in a high tension range under any working condition, so that the service life of the belt conveyor can be greatly reduced, and the maintenance and operation cost is increased.
In summary, how to provide a control method capable of providing an adaptive optimal tension according to different working conditions of a displacement belt conveyor is a problem to be solved in the current technical work in the field.
Disclosure of Invention
According to the technical problems that the service life of the belt conveyor is shortened and the operation and maintenance costs are high caused by the conventional fixed tensioning device, the movable tensioning control system for the belt conveyor is provided, and the optimal tensioning scheme can be output according to various working conditions of the belt conveyor during the working process, so that the belt tension is reduced under the condition that the belt conveyor does not slip.
The invention adopts the following technical means:
a movable tensioning control system for displacing a belt conveyor comprises an electric automation unit of the belt conveyor and an electric automation unit of a tail car, wherein the electric automation unit and the tail car are in communication connection through a wireless bus communication module;
the belt conveyor electric automation unit comprises a central processing unit, a field signal acquisition controller, an intelligent pull rope switch, a belt conveyor driving frequency converter, a belt conveyor motor, an industrial bus and first belt scale equipment, wherein the field signal acquisition controller, the belt conveyor driving frequency converter, the first belt scale equipment and the central processing unit are all connected to the industrial bus, a signal acquisition port of the field signal acquisition controller is connected with the intelligent pull rope switch, a control port of the belt conveyor driving frequency converter is connected with the belt conveyor motor, and the intelligent pull rope switch is paved along the belt conveyor;
the electric automation unit of the tail car comprises a signal acquisition controller, a tail car travel encoder, an automatic tensioning device and a second belt scale device, wherein the signal acquisition controller, the automatic tensioning device and the second belt scale device are all connected to an industrial bus, and a signal acquisition port of the signal acquisition controller of the car is connected with the tail car travel encoder.
Further, the belt conveyor electric automation unit further comprises a belt conveyor speed encoder, and a signal acquisition port of the field signal acquisition controller is connected with the belt conveyor speed encoder.
Further, the belt conveyor electric automation unit further comprises a material blocking switch, and a signal acquisition port of the on-site signal acquisition controller is connected with the material blocking switch.
Further, the belt conveyor electric automation unit further comprises a display module, the display module being connected to the industrial bus.
Further, the electric automation unit of the tail car further comprises a stroke control limit, and a signal acquisition port of the signal acquisition controller on the car is connected with the stroke control limit.
Further, the automatic tensioning device is an automatic hydraulic tensioning device or a winch tensioning device.
A mobile tension control method for a displacement belt conveyor, comprising:
acquiring a two-dimensional array of belt tension values under different working conditions;
determining an optimal belt tension value from the two-dimensional array of belt tension values according to the length, the load state, the running state and the current tension device position of the current belt conveyor;
and controlling the tensioning device to tension or loosen the belt according to the optimal belt tension value.
Further, the method includes the step of system fault self-checking.
A mobile tension control method for a displacement belt conveyor, comprising:
acquiring a theoretical tension value interval of the displacement belt conveyor in the whole process, dividing the tension value interval into a plurality of subintervals according to the set interval length, and assigning values to endpoints of each interval;
acquiring the running state of the displacement belt conveyor, and determining a corresponding starting coefficient according to the running state, wherein the running state of the displacement belt conveyor is judged according to the output of a central processing unit, a belt conveyor driving frequency converter and a belt conveyor speed encoder;
according to the material properties and the starting coefficient, calculating an optimal tensioning force value in a real-time state by using a tensioning force calculation model, and selecting a plurality of groups of bit values of a corresponding section according to a tensioning force section in which the optimal tensioning force value is located;
and controlling the tension of the system belt according to the plurality of groups of bit values of the corresponding interval.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the tension value can be adjusted according to the state change of the belt conveyor, so that the running state of the belt conveyor is optimized, the belt tension is reduced, and the service life of the belt is prolonged.
2. The belt conveyer of the tail car effectively avoids the problem of belt in idle load or half load caused by overlarge belt tension when the belt conveyer of the tail car runs near a belt blanking point.
Based on the reasons, the invention can be widely popularized in the fields of open-air construction and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a mobile tension control system according to the present invention.
Fig. 2 is a schematic view of the arrangement of the device of the present invention.
FIG. 3 is a flowchart illustrating a method for controlling a movable tension according to the present invention.
FIG. 4 is a flow chart showing a selection of a method for controlling a movable tension according to the present invention.
FIG. 5 is a flow chart of a cross-term selection of the method for controlling the movable tension of the present invention.
FIG. 6 is a tension division list of the mobile tension control method of the present invention.
FIG. 7 is a flowchart illustrating a second embodiment of the method for controlling a movable tension of the present invention.
Fig. 8 adjusts the tension division list in real time.
In the figure: 1. an electric automation unit of the belt conveyor; 11. a central processing unit; 12. a field signal acquisition controller; 13. a belt conveyor speed encoder; 14. an intelligent pull-cord switch; 15. a blocking switch; 16. a display device; 17. the belt conveyor drives a frequency converter; 18. a belt conveyor motor; 19. a first belt scale device; 2. a tail car electrical automation unit; 21. an on-board signal acquisition controller; 22. a tail car travel encoder; 23. controlling and limiting the stroke; 24. an automatic tensioning device; 25. a second belt scale device; 3. a wireless bus communication module; 4. an industrial bus;
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The invention provides a movable tension control system for a displacement belt conveyor. The automatic electric control device mainly comprises a belt conveyor electric automation unit and a tail car electric automation unit, wherein the belt conveyor electric automation unit and the tail car electric automation unit are in communication connection through a wireless bus communication module. As shown in fig. 1, the belt conveyor electric automation unit 1 comprises a central processing unit 11, a field signal acquisition controller 12, an intelligent pull-cord switch 14, a belt conveyor driving frequency converter 17, a belt conveyor motor 18, an industrial bus 4 and a first belt scale device 19, wherein the field signal acquisition controller 12, the belt conveyor driving frequency converter 17, the first belt scale device 19 and the central processing unit 11 are all connected to the industrial bus 4, a signal acquisition port of the field signal acquisition controller 12 is connected with the intelligent pull-cord switch 14, a control port of the belt conveyor driving frequency converter 17 is connected with the belt conveyor motor 18, and the intelligent pull-cord switch 14 is paved along the belt conveyor. The tail car electric automation unit 2 comprises an on-board signal acquisition controller 21, a tail car travel encoder 22, an automatic tensioning device 24 and a second belt scale device 25, wherein the on-board signal acquisition controller 21, the automatic tensioning device 24 and the second belt scale device 25 are all connected to the industrial bus 3, and a signal acquisition port of the on-board signal acquisition controller 21 is connected with the tail car travel encoder 22. Further, the belt conveyor electric automation unit 1 further comprises a belt conveyor speed encoder 13, and a signal acquisition port of the on-site signal acquisition controller 12 is connected with the belt conveyor speed encoder. Further, the belt conveyor electric automation unit 1 further comprises a material blocking switch 15, and a signal acquisition port of the field signal acquisition controller 12 is connected with the material blocking switch 15. The belt conveyor electric automation unit 1 further comprises a display module 16, which is connected to the industrial bus 4. In addition, the electric automation unit 2 of the tail car further comprises a travel control limit 23, and a signal acquisition port of the signal acquisition controller 21 on the car is connected with the travel control limit 23.
As shown in fig. 2, the belt drive inverter 17 is preferably disposed in an electrical room near the tail of the belt, the field signal acquisition controller 12 is disposed on a belt tail platform, the intelligent pull switch 14 is disposed bilaterally at 50 meter intervals along the belt, the belt motor 18 is connected to the belt tail drum, the first belt scale device 19 is disposed near the tail discharge hopper discharge outlet, the tail car electrical automation unit 2 includes an on-board signal acquisition controller 21, the automatic tensioner 24 is disposed on a tail car tensioning platform, the tail car travel encoder 22 is disposed on a tail car travel driven wheel, and the second belt scale device 25 is disposed in front of the tail car discharge drum.
In the above equipment, the intelligent pull switches 14 are safe and are arranged along the belt conveyor at intervals of 100 meters, and the length of the current belt conveyor can be calculated by identifying the number of the pull switches because the length of the belt conveyor is changed in a fixed length in the process. The first belt scale device 19 and the second belt scale device 25 can detect instantaneous values and accumulated values of materials passing through the belt scales in real time, and the real-time belt material quantity of the belt conveyor can be calculated by calculating the difference value between the accumulated values 19 and 25. The belt conveyor speed encoder 13 is used to detect the current real-time speed of the belt conveyor. The blocking switch 15 is used for detecting whether the tail funnel blocking condition exists in the current running state. The belt conveyor driving unit consisting of the belt conveyor driving frequency converter 17 and the belt conveyor motor 18 is used for controlling stable starting, running and speed regulation of the belt. The belt conveyor and tail car field data acquisition controllers 12 and 21 are used for acquiring sensor and equipment signals and sending control instructions to equipment. The tensioner 24 employs a controllable automatic hydraulic or winch tensioner for real-time tension output. The central control unit 11 is used for data processing and logic programming of the whole system. A human-machine interface (HMI) 16 is used for system operation, status display.
The invention also discloses a control method based on the system, as shown in fig. 3, according to the main implementation flow of the working condition adjusting method, the method comprises the following steps:
step 31, judging whether the whole set of system has faults, if so, executing step 32, jumping out of the process, and detecting the faults; if no fault occurs, step 33 is performed.
And step 33, drawing the optimal tension values under different working conditions as shown in fig. 6 through belt conveyor calculation software or manual calculation. A two-dimensional array of tension values is established according to fig. 6, after which step 34 is performed.
Step 34, a sub-flow of the calculation method for calculating how the column value pointed to by the data in the array should be selected under the current working condition, and then step 35 is executed.
Step 35, a sub-flow of the calculation method for calculating how the row value pointed to by the data in the array should be selected under the current working condition, and then step 36 is executed.
And step 36, selecting tension values in the array according to the calculated values in the steps 34 and 35, outputting the tension values to the tensioning device, and ending the process.
FIG. 4 shows a control method of the present invention, namely a sub-flow 1 for adjusting according to working conditions and a flow for selecting a column phase number according to working conditions, comprising the following steps:
step 341, a default value is added to the list value NL, where the default value is set to the least adverse working condition data list value (the maximum list value) calculated in the design stage, so as to avoid the situation of no data output, and then step 342 is executed. The most unfavorable working condition of taking the connecting plane rotation displacement belt conveyor (tail driving) of the soil discharging machine as an example is that the soil discharging machine runs to the head of the belt conveyor, the whole belt surface of the belt conveyor is fully loaded, and the tail is started in a material blocking state of a material receiving groove. At this time, the value of the tension of the belt conveyor is the upper limit.
In step 342, the current belt conveyor length is estimated through the intelligent pull switch 14, the column value NL is weighted, and step 343 is executed after it is determined that there is no calculation fault.
Step 343, acquiring the acquired values of the first belt scale device 19, the second belt scale device 25 and the encoder 22, subtracting the accumulated value of the first belt scale 19 from the accumulated value of the second belt scale device 25 to obtain the current belt amount, dividing the belt amount by the belt length acquired by the encoder 22 to obtain the belt amount per unit length of the belt conveyor, and finally comparing the obtained result with the design value to obtain that the current belt conveyor is in the no-load, half-load and full-load state, and further weighting the column value NL correspondingly, and then executing step 344.
Step 344, determining whether the belt conveyor is in a start or running state by the command of the central processing unit 11, the feedback state of the belt conveyor frequency converter 17 and the return value of the belt conveyor speed encoder 13: when the processing unit gives a starting instruction and the frequency converter returns an operation signal, judging that the belt conveyor starts to work; and comparing the returned value of the encoder with a given value given to the frequency converter by the central processing unit, if the returned value is smaller than the given value, judging the starting state, and if the returned value is equal to the given value and is stable for 30 seconds, judging the running state. After the status determination, the column values NL are weighted accordingly, and then step 345 is performed.
Step 345, outputting the column value NL calculated in the above steps, thereby completing the sub-flow 1.
FIG. 5 shows a control method of the present invention, namely a sub-flow 1 for adjusting according to working conditions and a flow for selecting a column phase number according to working conditions, comprising the following steps:
step 351, attaching a default value (maximum row value) to the row value NH, wherein the default value is set as the data column value of the most unfavorable working condition, so that the situation of no data output is avoided; the current tensioner position L is acquired by the tail car displacement encoder 22, after which step 352 is performed.
Step 352, calculate the current belt conveyor length through the intelligent pull switch 14, and then execute step 343.
Step 353, it is determined whether the position L is within the current belt conveyor length, if not, the calculation is stopped, the detection of the fault is prompted, the fault is detected when the intelligent switch 14 and the displacement encoder 22 are detected, and if yes, step 354 is executed.
Step 354, the L value is calculated by dividing the L value by the set forging length (e.g., 200 m) and rounding, and then step 355 is performed.
Step 355, outputting the row value NH calculated in the above steps, thereby completing the sub-flow 2.
Fig. 6 shows the calculated tension values under the working conditions shown in the table, taking a displacement belt conveyor with two length changes as an example. Wherein the empty, half-load and full-load conditions are selected according to the highest (unfavorable) value of the range interval.
The invention also discloses another control method based on the system, as shown in fig. 7, comprising the following steps:
step 41, judging whether the whole system has faults or not, if so, executing step 42, jumping out of the process, and detecting the faults; if no, step 43 is performed.
Step 43, data is established. Firstly, tension values A and B of the displacement belt conveyor are calculated by software or manually under optimal and unfavorable working conditions theoretically in the whole process. The appropriate interval length D is selected according to the range interval of A-B. An Array is established as shown in fig. 8, wherein the number of bits of the Array is E= (B-A)/D+1, the number of bits of the Array is Array [1], array [2], and Array [ E ] are respectively assigned with A+D, A+2D and … … B (constant). The field data is collected and assigned accordingly, after which step 44 is performed.
Step 44, judging whether the belt conveyor is in a starting state or an accelerating state or an operating state according to the command instruction of the central processing unit 11, the feedback state of the belt conveyor frequency converter 17 and the return value of the belt conveyor speed encoder 13, further selecting a corresponding starting coefficient, and then executing step 45.
Step 45, the central processing unit 11 brings all the parameters in the real-time state into the tension calculation model formula to calculate the optimal tension value N1 in the real-time state. The belt conveyor tension calculation models of different driving forms are slightly different, and are solidified in a control program. In this embodiment, the tail driving rotary displacement adhesive tape is taken as an example, and a specific model is as follows:
F＝L 1 K t K x +L 1 K t K y q B g+LK t 0.15q B g+q m g(L 1 K y +H)+F P +F am +F ac
T 2 ＝KFk A
N1＝T 2 +L 1 K t (K x +K y q B g)+q m g(L 1 K y +H)+F P1 +F am +F ac1
wherein: l-conveyor length, detected and calculated by the intelligent pull-cord switch 14;
L 1 -tail car distance tail position (length of strip section), detected by tail car journey encoder;
K t -an ambient temperature correction coefficient;
K x -the bending resistance coefficient of the conveyor belt through the idler roller;
K y -calculating the intrinsic parameters of the belt conveyor given in the stage of designing the drag coefficient of the carrier roller (including the conveyor belt);
q m the unit length mass of the material is obtained by collecting data from the belt scales 19, 25 and the encoder 22 and calculating;
q B -the mass per unit length of the conveyor belt, calculated in the design phase;
h, material lifting height, and calculating and giving in a design stage;
F P -all drum resistances, calculated at the design stage;
F P1 -the bearing section drum resistance, calculated at the design stage;
F am -material acceleration resistance at the receiving position, calculated and given in the design stage;
F ac -additional resistances, including guide chute, sweeper, etc., calculated at the design stage;
F ac1 -additional resistance, guide chute, calculated in design phase;
k A -a start-up factor, which is determined by the central processing unit 11 command, the feedback status of the belt conveyor frequency converter 17, the return value of the belt conveyor speed encoder 13, whether it is in a start-up status;
k is a conversion coefficient, and is calculated and given in a design stage;
in view of the fact that the real-time performance of the tensioning force output of the tensioning device is not very strong, a certain treatment is needed to be carried out on the output force value. As shown in fig. 8, it is determined in which tension zone the N1 value is, and the corresponding zone array bit value W is selected. Step 46 is then performed.
And step 46, selecting tension values in the array according to the calculated values in the step 45, outputting the tension values to the tensioning device, and ending the process.
The method of this embodiment is based on the above-described mobile belt tension control system (control structure shown in fig. 1) adapted for a displacement belt conveyor.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The movable tensioning control system for the belt conveyor is characterized by comprising an electric automation unit of the belt conveyor and an electric automation unit of a tail car, wherein the electric automation unit and the tail car are in communication connection through a wireless bus communication module;
the belt conveyor electric automation unit comprises a central processing unit, a field signal acquisition controller, an intelligent pull rope switch, a belt conveyor driving frequency converter, a belt conveyor motor, an industrial bus and first belt scale equipment, wherein the field signal acquisition controller, the belt conveyor driving frequency converter, the first belt scale equipment and the central processing unit are all connected to the industrial bus, a signal acquisition port of the field signal acquisition controller is connected with the intelligent pull rope switch, a control port of the belt conveyor driving frequency converter is connected with the belt conveyor motor, and the intelligent pull rope switch is paved along the belt conveyor;
the electric automation unit of the tail car comprises a signal acquisition controller, a tail car travel encoder, an automatic tensioning device and second belt scale equipment, wherein the signal acquisition controller, the automatic tensioning device and the second belt scale equipment are all connected to an industrial bus, and a signal acquisition port of the signal acquisition controller of the car is connected with the tail car travel encoder.
2. The mobile tension control system of claim 1, wherein the belt conveyor electrical automation unit further comprises a belt conveyor speed encoder, and wherein the signal acquisition port of the field signal acquisition controller is connected to the belt conveyor speed encoder.
3. The mobile tension control system of claim 1, wherein the belt conveyor electrical automation unit further comprises a blanking switch, and wherein the signal acquisition port of the field signal acquisition controller is connected to the blanking switch.
4. A mobile tension control system as recited in any one of claims 1-3, wherein the belt conveyor electrical automation unit further comprises a display module, the display module connected to an industrial bus.
5. The mobile tension control system of claim 1, wherein the tail car electrical automation unit further comprises a travel control limit, the signal acquisition port of the on-board signal acquisition controller being connected to the travel control limit.
6. The mobile tensioning control system of claim 1, wherein the automatic tensioning device is an automatic hydraulic tensioning device or a winch tensioning device.
7. A mobile tension control method for a displacement belt conveyor, comprising:
acquiring a two-dimensional array of belt tension values under different working conditions;
determining an optimal belt tension value from the two-dimensional array of belt tension values according to the length, the load state, the running state and the current tension device position of the current belt conveyor;
and controlling the tensioning device to tension or loosen the belt according to the optimal belt tension value.
8. The mobile tension control method of claim 7, further comprising the step of system fault self-checking.
9. A mobile tension control method for a displacement belt conveyor, comprising:
acquiring a theoretical tension value interval of the displacement belt conveyor in the whole process, dividing the tension value interval into a plurality of subintervals according to the set interval length, and assigning values to endpoints of each interval;
acquiring the running state of the displacement belt conveyor, and determining a corresponding starting coefficient according to the running state, wherein the running state of the displacement belt conveyor is judged according to the output of a central processing unit, a belt conveyor driving frequency converter and a belt conveyor speed encoder;
according to the material properties and the starting coefficient, calculating an optimal tensioning force value in a real-time state by using a tensioning force calculation model, and selecting a plurality of groups of bit values of a corresponding section according to a tensioning force section in which the optimal tensioning force value is located;
and controlling the tension of the system belt according to the plurality of groups of bit values of the corresponding interval.
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