CN116902534A - Belt conveyor and continuous distributed optical fiber sensing detection system thereof - Google Patents
Belt conveyor and continuous distributed optical fiber sensing detection system thereof Download PDFInfo
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- CN116902534A CN116902534A CN202310727766.9A CN202310727766A CN116902534A CN 116902534 A CN116902534 A CN 116902534A CN 202310727766 A CN202310727766 A CN 202310727766A CN 116902534 A CN116902534 A CN 116902534A
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- 238000001514 detection method Methods 0.000 title claims abstract description 230
- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 230000003287 optical effect Effects 0.000 claims abstract description 158
- 230000000712 assembly Effects 0.000 claims description 43
- 238000000429 assembly Methods 0.000 claims description 43
- 238000004804 winding Methods 0.000 claims description 25
- 239000004020 conductor Substances 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 7
- 239000003245 coal Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 4
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- 230000004927 fusion Effects 0.000 abstract description 3
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- 238000005406 washing Methods 0.000 description 2
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Classifications
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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
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
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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
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
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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
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0266—Control or detection relating to the load carrier(s)
- B65G2203/0275—Damage on the load carrier
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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
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a belt conveyor and a continuous distributed optical fiber sensing detection system thereof, wherein the detection system comprises: the device comprises a annunciator, a temperature/vibration sensing optical cable, a heat conduction shell and an optical fiber sensing demodulator; the method comprises the steps of arranging first, second, third and fourth detection points in a roller rotating shaft connection area of a roller assembly, continuously distributing temperature/vibration sensing optical cables at the detection points along a belt conveying direction, continuously monitoring faults of the connection area where the roller is easy to break down, installing the optical cables on the corresponding detection points through an adaptive heat conduction shell structure to collect roller temperature and vibration data, and using detection data processed by an optical fiber sensing demodulator for subsequent fault recognition, early warning and processing. The continuous real-time intelligent monitoring of the long distance, large range and high precision of the belt conveyor is realized, the reliability of the detection system is improved through multi-parameter fusion detection, the fault report is avoided, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber detection, in particular to a belt conveyor and a continuous distributed optical fiber sensing detection system thereof, which are used for detecting the belt conveyor for underground operation of a coal mine.
Background
The research of the belt type intelligent transportation system in China is relatively late in start, but the development is powerful, and the key technical research and new product development of the high-power long-distance belt conveyor for underground coal mines are greatly improved. In recent years, monitoring modes such as a temperature sensing cable and a patrol robot start to enter the field of monitoring states of the belt conveyor, and the monitoring modes are required to meet explosion-proof requirements, and are complex in design, high in cost and low in adaptability. In addition, the maximum monitoring length of a single host of the temperature sensing cable is not more than 600m, and the problems that the continuity monitoring is difficult to realize by a patrol robot and the like are solved, so that the reliability and the safety of the state monitoring of the belt conveyor are reduced.
The faults of the conveyor are mainly divided into mechanical faults and electrical faults, wherein the mechanical faults account for more than 60%, and a carrier roller is used as an important transmission device of the conveyor body and is a main part for generating the mechanical faults. The carrier roller faults are mainly divided into carrier roller barrel skin abrasion, carrier roller bearing abrasion, carrier roller bending deformation damage and the like, so that the production efficiency of the conveyor is seriously affected, and even serious accidents such as fire disaster and the like can be caused. When the carrier roller breaks down, abnormal changes of various physical parameters such as temperature, vibration and the like are usually generated, and the type of the fault is difficult to accurately distinguish by monitoring one parameter. The underground working condition environment of the coal mine is complex, and parameters such as temperature, vibration and the like caused by other non-fault factors are abnormal near the machine body, so that false alarm or missing alarm of faults is caused, and the reliability of a monitoring system is reduced.
In summary, a novel continuous multi-parameter fusion detection method capable of realizing full-belt trend arrangement is needed in the field to realize long-distance, large-range and high-precision multi-parameter real-time monitoring of a belt conveyor.
Disclosure of Invention
It is an object of the present invention to provide a continuous distributed optical fiber sensing detection system that solves or at least alleviates one or more of the above-mentioned and other problems of the prior art.
In a first aspect, an embodiment of the present invention provides a continuous distributed optical fiber sensing detection system, which is used for detecting a belt conveyor for underground coal mine operation, where the belt conveyor includes a belt and multiple groups of carrier roller assemblies, each group of carrier roller assemblies is formed by connecting a first carrier roller, a second carrier roller and a third carrier roller end to end, the carrier roller assemblies are arranged on a concave carrier roller support through carrier roller rotating shafts on a vertical surface, the surface of the belt attached carrier roller is arranged along a belt conveying direction, a first detection point is set at an outer end of the first carrier roller rotating shaft, a second detection point is set at a joint of the first carrier roller and the second carrier roller, a third detection point is set at a joint of the second carrier roller and the third carrier roller, and a fourth detection point is set at an outer end of the third carrier roller rotating shaft;
the optical fiber sensing detection system comprises a annunciator, a temperature/vibration sensing optical cable, a heat conduction shell and an optical fiber sensing adjuster; the temperature/vibration sensing optical cables are continuously distributed along the belt conveying direction and are arranged at the first detection point, the second detection point, the third detection point and the fourth detection point through the heat conduction shell;
the optical signals generated by the annunciator flow through a temperature/vibration sensing optical cable and are processed by an optical fiber sensing demodulator to obtain temperature and vibration detection data of each group of carrier roller assemblies at the first detection point, the second detection point, the third detection point and the fourth detection point.
Optionally, in the detection system as described above, the first detection point is disposed on an outer end carrier roller support of the first carrier roller shaft, the fourth detection point is disposed on an outer end carrier roller support of the third carrier roller shaft, the second detection point is disposed on a carrier roller support at a junction of the first carrier roller and the second carrier roller, and the third detection point is disposed on a carrier roller support at a junction of the second carrier roller and the third carrier roller.
Optionally, in the detection system as described above, the heat conductive housing includes a cable housing portion and a mounting portion, and the temperature/vibration sensing optical cable is mounted in the cable housing portion in a straight state, in an arrangement of one or more windings, and is fixed at the first detection point, the second detection point, the third detection point, and the fourth detection point by the mounting portion.
Optionally, in the foregoing detection system, the temperature/vibration sensing optical cable is arranged at the second detection point and the third detection point in a straight line state through a heat conducting shell, the heat conducting shell is configured to be composed of a first strip-shaped plate and a second strip-shaped plate, a long groove-shaped optical cable accommodating part is formed on the surface of the first strip-shaped plate along the length direction, first pin holes are formed at two ends of the first strip-shaped plate, the temperature/vibration sensing optical cable is arranged in the long groove-shaped optical cable accommodating part, first pin shafts are arranged at two ends of the second strip-shaped plate, the first strip-shaped plate is clung to a carrier roller support when being assembled, the second strip-shaped plate is inserted into the first pin holes through the first pin shafts, and the temperature/vibration sensing optical cable is mounted at the second detection point and the third detection point.
Optionally, in the foregoing detection system, the first strip of plate is made of a metal heat conducting material, and the second strip of plate is made of a rubber heat insulating material.
Optionally, in the foregoing detection system, the temperature/vibration sensing optical cable is disposed at the first detection point and the fourth detection point in a manner of winding around the first detection point through a heat conducting shell, the heat conducting shell is composed of a third strip-shaped plate and a foldable optical cable accommodating part, two sides of the foldable optical cable accommodating part are opposite to two ends of the third strip-shaped plate and are provided with second pin holes, a circular groove is formed in the foldable optical cable accommodating part, the temperature/vibration sensing optical cable is disposed in the circular groove around the first strip-shaped plate, the third strip-shaped plate is closely attached to the idler support during assembly, and the foldable optical cable accommodating part is inserted into the second pin holes through a second pin shaft to fix the temperature/vibration sensing optical cable at the first detection point and the fourth detection point.
Optionally, in the foregoing detection system, the third strip plate is made of a metal heat conducting material, and the foldable optical cable accommodating portion is made of a rubber heat insulating material.
Optionally, in the foregoing detection system, the temperature/vibration sensing optical cable is arranged at the first detection point and the fourth detection point through a heat conducting shell in a mode of winding for a plurality of circles, the heat conducting shell is composed of a fourth strip-shaped plate and a box-shaped optical cable containing part, the box-shaped optical cable containing part comprises a box body and an optical cable winding barrel, the optical cable winding barrel is wound for a plurality of circles on the optical cable winding barrel and is nested in the box body, third pin holes are oppositely arranged at two ends of the side edge of the optical cable winding barrel and two ends of the fourth strip-shaped plate, the fourth strip-shaped plate is tightly attached to the carrier roller support when being assembled, and the box-shaped optical cable containing part is inserted into the third pin holes through a third pin shaft to fix the temperature/vibration sensing optical cable at the first detection point and the fourth detection point.
Optionally, in the foregoing detection system, the fourth strip plate and the optical cable winding drum are made of metal heat conducting materials, and the box body is made of rubber heat insulating materials.
Optionally, in the foregoing detection system, the optical fiber sensing detection system is continuously arranged at the first detection point of each group of carrier roller assemblies along the belt conveying direction through one of the temperature/vibration sensing optical cables, is continuously arranged at the second detection point of each group of carrier roller assemblies along the belt conveying reverse direction, is continuously arranged at the third detection point of each group of carrier roller assemblies along the belt conveying direction, and is continuously arranged at the fourth detection point of each group of carrier roller assemblies along the belt conveying reverse direction.
Optionally, in the foregoing detection system, the optical fiber sensing detection system is arranged continuously after the first detection point, the second detection point, the third detection point and the fourth detection point of the previous group of idler assemblies along the belt conveying direction through one temperature/vibration sensing optical cable, and is arranged in a retracing way after the fourth detection point of the next group of idler assemblies.
Optionally, in the foregoing detection system, the optical fiber sensing detection system is arranged along the belt conveying direction through four temperature/vibration sensing optical cables, wherein a first temperature/vibration sensing optical cable is continuously arranged at a first detection point of each group of idler assemblies, a second temperature/vibration sensing optical cable is continuously arranged at a second detection point of each group of idler assemblies, a third temperature/vibration sensing optical cable is continuously arranged at a third detection point of each group of idler assemblies, and a fourth temperature/vibration sensing optical cable is continuously arranged at a fourth detection point of each group of idler assemblies.
Optionally, in the detection system as described above, the temperature/vibration sensing optical cable includes a temperature sensing optical fiber and a vibration sensing optical fiber for detecting temperature data and vibration data, respectively.
Optionally, in the detection system as described above, the temperature/vibration sensing optical cable is further provided with a reinforcing element arranged at a central axis of the temperature/vibration sensing optical cable and a protection structure covering the temperature sensing optical fiber, the vibration sensing optical fiber and the reinforcing element.
Alternatively, in the detection system as described above, five sets of the temperature/vibration sensing optical cables are employed in a side-by-side arrangement.
Optionally, in the foregoing detection system, the optical fiber sensing demodulator transmits the obtained temperature and vibration detection data to a fault sensing information database through a temperature/vibration parameter transmission model, the fault sensing information database performs matching analysis on the detection data and historical fault sensing information, and the intelligent fault identification system identifies the fault type according to a matching analysis result.
In a second aspect, embodiments of the present invention provide a belt conveyor having a detection system of any one of the preceding claims.
According to the technical scheme, the first, second, third and fourth detection points are arranged in the carrier roller connection area of the carrier roller assembly, the temperature/vibration sensing optical cables are continuously distributed at the detection points along the belt conveying direction, continuous fault monitoring is carried out on the connection area where the carrier roller is easy to fail, the optical cables are arranged on the corresponding detection points through the adaptive heat conduction shell structure to effectively collect carrier roller temperature and vibration data, the parts, attached to the carrier roller support, of the heat conduction shell are made of metal heat conduction materials, the carrier roller temperature/vibration can be better transmitted to the optical cables, the heat conduction efficiency is improved, the parts, coated with the optical cables, of the heat conduction shell are made of rubber heat insulation materials, heat escape can be better avoided, and the effectiveness of the optical cables on temperature detection is improved. The optical cables are arranged into the concave shape, the S shape or the parallel straight lines along the conveying direction of the belt through the detection points, so that the temperature change and the vibration condition of the connecting area of the carrier roller assembly of the whole belt can be detected, and further, the long-distance unmanned continuous state real-time monitoring of the conveyor is realized. The temperature/vibration sensing optical cable integrates the temperature sensing optical fiber and the vibration sensing optical fiber together, realizes the double-parameter fusion monitoring of temperature and vibration through one optical cable, can avoid fault false alarm or missing report, and improves the reliability of a monitoring system. After the optical fiber sensing demodulator processes the temperature and vibration detection data detected by the optical cable, the intelligent fault recognition system recognizes the fault type for subsequent fault early warning and processing, thereby improving the reliability and intellectualization of system detection and reducing the maintenance cost.
Drawings
The present disclosure will become more apparent with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. In the figure:
FIG. 1 is a schematic view of a belt conveyor according to an embodiment of the present invention;
fig. 2 is a schematic view of a set of idler assemblies provided in an embodiment of the present invention;
FIG. 3 is a schematic view of a second detection point and a heat-conductive housing for arranging optical cables in a straight line state according to an embodiment of the present invention;
FIG. 4 is a schematic view of a heat-conductive housing with a first detection point and an optical cable arranged in a winding manner according to an embodiment of the present invention;
FIG. 5 is a schematic view of a heat-conductive housing for arranging optical cables in a multi-winding manner at a fourth inspection point according to an embodiment of the present invention;
FIG. 6 illustrates three arrangements of temperature/vibration sensing fiber optic cables provided by embodiments of the present invention;
fig. 7 is a schematic diagram of an internal structure of a temperature/vibration sensing optical cable according to an embodiment of the present invention.
Reference numerals: 1-an optical fiber sensing detection system; 11-annunciators; 12-temperature/vibration sensing cable; 121-temperature optical fiber; 122-vibrating the optical fiber; 123-reinforcing elements; 13 a thermally conductive housing; 131-a first strip; 132-a second strip; 133-a third strip of plates; 134-a collapsible cable accommodation; 135-a fourth strip of plates; 136-a box-like cable accommodation portion; 14-an optical fiber sensing demodulator; 15-a multiplexer;
2-belt conveyor; 21-a carrier roller assembly; 211-a first idler; 212-a second idler; 213-a third idler; 22-carrier roller brackets; 221-a first detection point; 222-a second detection point; 223-a third detection point; 224-a fourth detection point; 23-belt.
Detailed Description
The structural composition, features, advantages, and the like of the washing machine and the control method therefor according to the present invention will be described below by way of example with reference to the accompanying drawings and specific embodiments, however, all descriptions should not be construed as limiting the present invention in any way.
Furthermore, to the extent that any individual feature described or implied in the embodiments set forth herein, or any individual feature shown or implied in the figures, the invention still allows any combination or deletion of such features (or equivalents thereof) without any technical hurdle, and further embodiments according to the invention are considered to be within the scope of the disclosure herein.
It should also be noted that the terms "first," second, "" third, "and fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", "third", and "fourth" may explicitly or implicitly include at least one such feature.
It should also be noted that the positional or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the positional or positional relationship of the washing machine and the water collection tank shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.
Fig. 1 is a schematic diagram of a belt conveyor according to an embodiment of the present invention.
As shown in fig. 1, the belt conveyor 2 for underground operation of coal mine comprises a belt 23 and a plurality of groups of carrier roller assemblies 21 arranged side by side along the conveying direction of the belt, each group of carrier roller assemblies is arranged in a concave carrier roller support 22, an optical fiber sensing detection system 1 is further arranged along the conveying direction of the belt and comprises a annunciator 11, a temperature/vibration sensing optical cable 12, a heat conducting shell 13 and an optical fiber sensing demodulator 14, the temperature/vibration sensing optical cable 12 is arranged along the conveying direction of the belt conveyor 2, one end of the temperature/vibration sensing optical cable 12 is connected with the annunciator 11, the other end of the temperature/vibration sensing optical cable 12 is connected with the optical fiber sensing demodulator 14, and the temperature/vibration sensing optical cable 12 is arranged in a continuous distribution mode, and is used for detecting the temperature and vibration data of carrier rollers through detection points of each carrier roller assembly 21. The specific arrangement of the temperature/vibration sensing fiber optic cable 12 will be specifically illustrated in fig. 5-7.
Fig. 2 is a schematic view of a set of idler assemblies provided in an embodiment of the present invention.
Each set of idler assemblies 21, as shown in fig. 2, includes a first idler 211, a second idler 212, and a third idler 213, the first idler 211, the second idler 212, and the third idler 213 being sequentially secured to the idler support 22 by idler shafts. The idler supports 22 are configured in a structure with two outer supports high, two middle supports low and a concave shape on a vertical surface, and the belt 23 is attached to the idler surfaces of each group of idler assemblies and is arranged along the conveying direction.
In the process of conveying materials by the belt conveyor 2, the carrier roller is a main part of the belt conveyor 2, which has mechanical failure. Abnormal temperature and vibration parameters can be generated when the carrier roller fails due to reasons such as carrier roller skin abrasion, carrier roller bearing abrasion, carrier roller bending deformation damage and the like, and the joint of the carrier roller and the carrier roller end to end and the joint of the carrier roller rotating shaft and the carrier roller bracket are all main parts for generating heat and vibration change, and detection points are arranged at the joint of the carrier roller and the carrier roller end to end and the joint of the carrier roller rotating shaft and the carrier roller bracket:
a first detection point 221 is arranged at the outer end part of the rotating shaft of the first carrier roller 211, a second detection point 222 is arranged at the joint of the first carrier roller 211 and the second carrier roller 212, a third detection point 223 is arranged at the joint of the second carrier roller 212 and the third carrier roller 213, and a fourth detection point 224 is arranged at the outer end part of the rotating shaft of the third carrier roller 213.
In an alternative embodiment, the first detection point 221 is disposed on an outer end idler support of the first idler 211 shaft, the fourth detection point 224 is disposed on an outer end idler support of the third idler 213 shaft, the second detection point 222 is disposed on an idler support of the junction of the first idler 211 and the second idler 212, and the third detection point 223 is disposed on an idler support of the junction of the second idler 212 and the third idler 213.
In the embodiment of fig. 2, the heat conductive housing 13 is respectively disposed at the first detection point 221, the second detection point 222, the third detection point 223 and the fourth detection point 224 for detecting the temperature and vibration data of the carrier roller. By providing the first detection point 221, the second detection point 222, the third detection point 223, and the fourth detection point 224 in the area where the carrier roller is likely to be faulty as described above, the optical cable can detect more accurate temperature and vibration data, and the position of the carrier roller where the fault occurs can be more accurately determined based on the data.
Fig. 3 is a schematic diagram of a second detection point and a heat-conducting housing with optical cables arranged in a straight line state according to an embodiment of the present invention.
The heat conducting shell is arranged on the middle bracket of the concave-shaped carrier roller bracket as shown in figure 3. The thermally conductive housing 13 includes a first strip plate 131 and a second strip plate 132 between which the temperature/vibration sensing optical cable 12 is arranged in a straight line state. The first strip-shaped plate 131 is in a strip shape, the first strip-shaped plate 131 is provided with a long groove-shaped optical cable accommodating part along the length direction, and two ends of the first strip-shaped plate are provided with first pin holes. The temperature/vibration sensing fiber optic cable 12 is disposed within the elongated slot-like fiber optic cable receiving portion. The two ends of the second strip-shaped plate are provided with first pin shafts. The first strip plate 131 is closely attached to the idler cradle when the first strip plate 131 and the second strip plate are assembled, the second strip plate is inserted into the first pin hole through the first pin shaft, and the temperature/vibration sensing optical cable 12 is installed at the second detection point 222. It should be noted herein that, depending on the specific structural arrangement and assembly requirements, a person skilled in the art may choose to use "bolts", "screw holes" or other fastening structures, and various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention, which falls within the scope of the present invention. In an alternative embodiment, the first strip 131 is made of a metal heat conducting material to increase the heat conduction efficiency of the idler cradle for conducting temperature to the cable, and the second strip is made of a rubber heat insulating material to avoid inaccurate temperature detection data caused by heat escaping from the first strip and the cable.
In an alternative embodiment, the heat conductive housing 13 composed of the first strip plate 131 and the second strip plate 132 may be disposed at the second detection point 222 or the third detection point 223. The heat conduction shell 13 formed by the first strip-shaped plate 131 and the second strip-shaped plate 132 is long and narrow in structure, small in occupied space and suitable for being installed in a narrow space of the second detection point 222 and the third detection point 223 at the bottom of the carrier roller assembly. In this embodiment, the middle support frame of the concave-shaped roller support frame is configured into a trapezoid structure, the supports at the second detection point 222 and the third detection point 223 enclose a triangular space, the rotating shaft ends of the first roller and the second roller are mounted on the triangle, the heat conducting shell 13 formed by the first strip-shaped plate 131 and the second strip-shaped plate 132 is arranged in the triangular space, the internal space is narrow, the heat production amount is high, and the temperature and vibration data of the roller can be effectively detected only by passing a certain straight line section of the temperature/vibration optical cable through the space.
Fig. 4 is a schematic view of a first detection point and a heat-conductive housing with optical cables arranged in a winding manner according to an embodiment of the present invention.
As shown in fig. 4, for facilitating the rotation of the carrier roller and the installation of the carrier roller rotating shaft, two outer side brackets of the concave-shaped carrier roller bracket are provided with tail ends which incline inwards by 15-30 degrees, one end of the first carrier roller 211 rotating shaft is installed on the tail end, and the other end of the first carrier roller 211 rotating shaft is installed on the middle bracket of the trapezoid structure. The thermally conductive housing 13 includes a third strip 133 and a collapsible cable housing portion 134. The folding angle of the foldable cable accommodation portion 134 matches the end angle of the idler cradle being inclined inwardly by 15 ° -30 °. The two-end protruding structure of the foldable optical cable housing portion 134 in the transverse direction is provided with a second pin hole opposite to the two ends of the third strip plate 133, a circular groove is formed in the foldable optical cable housing portion 134, and the temperature/vibration sensing optical cable 12 is wound around and arranged in the circular groove. The third plate 133 is closely attached to the idler support when the thermally conductive housing 13 is assembled to the idler support, and the foldable optical cable receiver 134 is inserted into the second pin hole through the second pin shaft to secure the temperature/vibration sensing optical cable 12 at the first detection point 221. It should be noted herein that, depending on the specific structural arrangement and assembly requirements, a person skilled in the art may choose to use "bolts", "screw holes" or other fastening structures, and various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention, which falls within the scope of the present invention.
Wherein, the collapsible structure of collapsible optical cable holding portion 134 can hug closely the terminal dog-ear structure of bearing roller support, fully gathers the heat that the bearing roller produced on the bearing roller support and conducts to temperature/vibration sensing optical cable 12. The arrangement of the winding round in the circular groove of the cable housing can increase the contact area between the temperature/vibration sensing cable 12 and the idler bracket, thereby improving the heat conduction efficiency. In an alternative embodiment, the third strip 133 may be made of a metal heat conductive material to increase heat transfer efficiency, and the foldable cable housing 134 may be made of a rubber heat insulating material to avoid inaccurate test data caused by heat escaping.
Fig. 5 is a schematic diagram of a fourth detection point and a heat-conducting housing for arranging an optical cable in a multi-winding manner according to an embodiment of the present invention.
As shown in fig. 5, the temperature/vibration sensing optical cable 12 is arranged at the fourth detection point 224 by the heat conductive housing 13 in a wound multi-turn manner, the heat conductive housing 13 is composed of a fourth strip plate 135 and a box-like optical cable housing part 136, and the box-like optical cable housing part 136 includes a box body and an optical cable winding drum. The optical cable winding drum is wound with a plurality of circles of temperature/vibration sensing optical cables 12 and is nested in the box body, third pin holes are oppositely formed in the side edges of the optical cable winding drum and the two ends of the fourth strip-shaped plate 135, the fourth strip-shaped plate 135 is tightly attached to the carrier roller support during assembly, and the box-shaped optical cable containing part 136 is inserted into the third pin holes through the third pin shafts to fix the temperature/vibration sensing optical cables 12 at the fourth detection points 224. It should be noted herein that, depending on the specific structural arrangement and assembly requirements, a person skilled in the art may choose to use "bolts", "screw holes" or other fastening structures, and various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention, which falls within the scope of the present invention. In an alternative embodiment, the fourth strip 135 may be made of a metal heat conductive material to increase heat transfer efficiency, and the box may be made of a rubber heat insulating material to avoid inaccurate temperature data measurement due to heat loss.
The thermally conductive housing 13 as shown in fig. 5 and the thermally conductive housing 13 as shown in fig. 4 may be provided at the first detection point 221 or the fourth detection point 224 in an alternative embodiment. The outer end of the carrier roller support is provided with enough space to set the heat conducting shell 13, compared with the positions of the second detection point 222 and the third detection point 223, the carrier roller at the positions of the first detection point 221 and the fourth detection point 224 has lower heat generation amount, if the heat escape is larger, accurate temperature data are difficult to detect, the heat collection precision requirement is higher, the foldable optical cable containing part 134 and the optical cable winding tube can completely wrap the temperature/vibration sensing optical cable 12 after winding one or more circles on the carrier roller support, the contact area between the temperature/vibration sensing optical cable 12 and the carrier roller support is increased, the heat escape is greatly reduced, and the heat conducting efficiency is improved.
It should be noted that the structure or mounting position of the heat conductive housing 13 at the first detection point 221, the second detection point 222, the third detection point 223, and the fourth detection point 224 as described above should not affect the normal turning of the first carrier roller 211, the second carrier roller 212, and the third carrier roller 213.
FIG. 6 illustrates three arrangements of temperature/vibration sensing fiber optic cables provided by embodiments of the present invention; each of 6 (a), 6 (b) shown in fig. 6 is provided with a continuous distributed arrangement of one cable along the detection point on the idler assembly 21, and the embodiment shown in 6 (c) is provided with a distributed arrangement of 4 cables along the detection point on the idler assembly. In the embodiment shown in fig. 6 (a), the optical fiber sensing and detecting system 1 is arranged continuously in the conveying direction of the belt 23 at the first detection point 221 of each group of carrier roller assemblies 21 through one of the temperature/vibration sensing optical cables 12, is arranged continuously in the conveying direction of the belt 23 at the second detection point 222 of each group of carrier roller assemblies 21, is arranged continuously in the conveying direction of the belt 23 at the third detection point 223 of each group of carrier roller assemblies 21, and is arranged continuously in the conveying direction of the belt 23 at the fourth detection point 224 of each group of carrier roller assemblies 21. An annunciator 11 is provided at one end of the temperature/vibration sensing optical cable 12 for emitting an optical signal. An optical fiber sensing demodulator 14 is provided at the other end of the temperature/vibration sensing optical cable 12 for demodulating the acquired temperature and vibration data.
In the embodiment shown in fig. 6 (b), the optical fiber sensing and detecting system 1 is arranged in the conveying direction of the belt 23 in succession at the first detection point 221, the second detection point 222, the third detection point 223, and the fourth detection point 224 of the preceding group of idler assemblies 21 by one of the temperature/vibration sensing optical cables 12, and is folded back at the fourth detection point 224 of the following group of idler assemblies 21. An annunciator 11 is provided at one end of the temperature/vibration sensing optical cable 12 for emitting an optical signal. An optical fiber sensing demodulator 14 is provided at the other end of the temperature/vibration sensing optical cable 12 for demodulating the acquired temperature and vibration data.
By arranging the temperature/vibration sensing optical cables 12 in the two embodiments shown in fig. 6 (a) and 6 (b), the optical fiber sensing detection system 1 can detect the temperature and vibration data change of each main heat generating end of the carrier roller, so as to realize continuous real-time monitoring of the belt conveyor 2.
In the embodiment shown in fig. 6 (c), the optical fiber sensing and detecting system 1 is arranged along the conveying direction of the belt 23 by four temperature/vibration sensing optical cables 12, wherein the first temperature/vibration sensing optical cable 12 is arranged continuously at a first detection point 221 of each group of carrier roller assemblies 21, the second temperature/vibration sensing optical cable 12 is arranged continuously at a second detection point 222 of each group of carrier roller assemblies 21, the third temperature/vibration sensing optical cable 12 is arranged continuously at a third detection point 223 of each group of carrier roller assemblies 21, and the fourth temperature/vibration sensing optical cable 12 is arranged continuously at a fourth detection point 224 of each group of carrier roller assemblies 21. An annunciator 11 is provided at one end of each temperature/vibration sensing optical cable 12 for emitting an optical signal. The other ends of the four temperature/vibration sensing optical cables 12 are integrally mounted to the multiplexer 15 for integrating the optical signals inputted from the four temperature/vibration optical cables into one optical signal output through the multiplexer 15. An optical fiber sensing demodulator 14 is arranged at the output end of the multiplexer 15 and is used for demodulating the temperature and vibration data acquired by the four optical cables.
By arranging the temperature/vibration sensing optical cable 12 as described above, the optical fiber sensing detection system 1 can detect the temperature and vibration data change of each main heat generating end of the carrier roller. The arrangement mode of the four temperature/vibration sensing optical cables 12 can also avoid the problem of high maintenance and replacement cost caused by overlong arrangement of only one temperature/vibration optical cable.
Compared with manual or robot inspection, the optical cable arrangement mode in the embodiment shown in 6 (a), 6 (b) and 6 (c) can monitor the operation state of the belt conveyor 2 in real time, and the situation that the interlocking fault is not timely found due to the fault and the economic loss is larger is reduced to a greater extent.
Fig. 7 is a schematic diagram of an internal structure of a temperature/vibration sensing optical cable according to an embodiment of the present invention.
As shown in fig. 7, the temperature/vibration sensing optical cable includes a temperature sensing optical fiber 121 and a vibration sensing optical fiber 122, which are capable of simultaneously detecting temperature and vibration data, and a reinforcing member 123 is further provided at a central axis position of the optical cable to reinforce structural strength and stability of the temperature/vibration sensing optical cable 12, and in addition, the temperature sensing optical fiber 121, the vibration sensing optical fiber 12 and the reinforcing member 123 are coated by a protective structure. Preferably, a structure in which five sets of temperature/vibration sensing optical cables 12 are arranged side by side may be adopted, and the five sets of temperature/vibration sensing optical cables are coated side by an external protection structure, so as to strengthen the structural strength of the optical cable and improve the detection effectiveness. In other scenarios, the number and arrangement of the optical fibers, strength members, and the like of the temperature/vibration sensing cable 12 may be arbitrary, depending on factors such as thermal conductivity, maintenance costs, etc. in a particular operating environment.
In an alternative embodiment, the internal structure may be five internal structures arranged side by side in the external protection structure according to the heat generating condition, economic cost or transportation environment during the operation of the carrier roller, or any other number of internal structures may be arranged in the external protection structure in a suitable manner so as to achieve the optimal temperature and vibration data detection effect.
The optical fiber sensing detection system 1 works in such a manner that the annunciator 11 emits an optical signal, temperature and vibration data from the first detection point 221, the second detection point 222, the third detection point 223 and the fourth detection point 224 are obtained via the temperature/vibration sensing optical cable 12, and then the temperature and vibration data are transmitted to the optical fiber sensing demodulator 14, and the optical fiber sensing demodulator 14 demodulates the signal into computer data and records the computer data in the fault sensing information database.
In an alternative embodiment, the computer collects and demodulates temperature and vibration detection data via the temperature/vibration sensing fiber optic cable 12 and transmits the detection data to a fault sensing information database that compares and matches the real-time temperature and vibration data with historical fault sensing information to determine the current operating condition of the belt conveyor 2. If the computer monitors that the acquired temperature and vibration data are matched with the historical fault sensing information, the intelligent fault identification system identifies the fault type according to the matching analysis result, and accurately positions the carrier roller with faults so as to achieve the purposes of quick overhaul and early warning. The computer data model is a common technology in the computer field, and is not described herein.
The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present invention is not limited to the specific combinations of technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present invention (but not limited to) having similar functions are replaced with each other.
Claims (17)
1. The continuous distributed optical fiber sensing detection system (1) is used for detecting a belt conveyor (2) for underground coal mine operation, the belt conveyor (2) comprises a belt (23) and a plurality of groups of carrier roller assemblies (21), each group of carrier roller assemblies (21) is formed by connecting a first carrier roller (211), a second carrier roller (212) and a third carrier roller (213) end to end, the belt (23) is attached to the surface of the carrier roller and is arranged along the conveying direction of the belt (23) through a carrier roller rotating shaft on a vertical surface, and the continuous distributed optical fiber sensing detection system is characterized in that a first detection point (221) is arranged at the outer end part of the rotating shaft of the first carrier roller (211), a second detection point (222) is arranged at the joint of the first carrier roller (211) and the second carrier roller (212), a third detection point (223) is arranged at the joint of the second carrier roller (212) and the third carrier roller (213), and a fourth detection point (224) is arranged at the outer end part of the rotating shaft of the third carrier roller (213);
the optical fiber sensing detection system (1) comprises a annunciator (11), a temperature/vibration sensing optical cable (12), a heat conduction shell (13) and an optical fiber sensing demodulator (14); the temperature/vibration sensing optical cables (12) are continuously distributed along the conveying direction of the belt (23), and are arranged at a first detection point (221), a second detection point (222), a third detection point (223) and a fourth detection point (224) through the heat conducting shell (13);
the annunciator (11) generates an optical signal, and the optical signal is processed by an optical fiber sensing demodulator (14) after flowing through a temperature/vibration sensing optical cable (12) to obtain temperature and vibration detection data of each group of carrier roller assemblies (21) at the first detection point (221), the second detection point (222), the third detection point (223) and the fourth detection point (224).
2. The detection system according to claim 1, wherein the first detection point (221) is disposed on an outer end carrier roller support (22) of the first carrier roller (211) rotating shaft, the fourth detection point (224) is disposed on an outer end carrier roller support (22) of the third carrier roller (213) rotating shaft, the second detection point (222) is disposed on a carrier roller support (22) at a junction of the first carrier roller (211) and the second carrier roller (212), and the third detection point (223) is disposed on a carrier roller support (22) at a junction of the second carrier roller (212) and the third carrier roller (213).
3. The detection system according to claim 1, wherein the thermally conductive housing (13) comprises a cable housing portion and a mounting portion, the temperature/vibration sensing cable (12) being mounted in the cable housing portion in a straight state, in one or more turns of arrangement, and being fixed by the mounting portion at the first detection point (221), the second detection point (222), the third detection point (223) and the fourth detection point (224).
4. A detection system according to claim 3, characterized in that the temperature/vibration sensing optical cable (12) is arranged in a straight line state at the second detection point (222) and the third detection point (223) through a heat conducting shell (13), the heat conducting shell (13) is configured to be composed of a first strip-shaped plate (131) and a second strip-shaped plate (132), a long groove-shaped optical cable accommodating part is formed on the surface of the first strip-shaped plate (131) along the length direction, first pin holes are formed at two ends of the first strip-shaped plate, the temperature/vibration sensing optical cable (12) is arranged in the long groove-shaped optical cable accommodating part, first pin shafts are arranged at two ends of the second strip-shaped plate (132), the first strip-shaped plate (131) is clung to a carrier roller bracket (22) when assembled, the second strip-shaped plate (132) is inserted into the first pin holes, and the temperature/vibration sensing optical cable (12) is mounted at the second detection point (222) and the third detection point (223).
5. The detection system according to claim 4, wherein the first strip (131) is made of a metal heat conducting material and the second strip (132) is made of a rubber heat insulating material.
6. A detection system according to claim 3, wherein the temperature/vibration sensing optical cable (12) is arranged at the first detection point (221) and the fourth detection point (224) through a heat conducting shell (13) in a winding way, the heat conducting shell (13) is composed of a third strip-shaped plate (133) and a foldable optical cable accommodating part (134), two sides of the foldable optical cable accommodating part (134) are opposite to two ends of the third strip-shaped plate (133) and are provided with second pin holes, a circular groove is formed in the foldable optical cable accommodating part (134), the temperature/vibration sensing optical cable (12) is arranged in the circular groove in a winding way, the third strip-shaped plate (133) is clung to a carrier roller bracket (22) when assembled, and the foldable optical cable accommodating part (134) is inserted into the second pin holes to fix the temperature/vibration sensing optical cable (12) at the first detection point (221) and the fourth detection point (224).
7. The system of claim 6, wherein the third strip (133) is a metallic, thermally conductive material and the foldable cable housing (134) is a rubber, thermally insulating material.
8. A test system according to claim 3, wherein the temperature/vibration sensing optical cable (12) is arranged at the first test point (221) and the fourth test point (224) through a heat conducting shell (13) in a multi-winding way, the heat conducting shell (13) is composed of a fourth strip-shaped plate (135) and a box-shaped optical cable containing part (136), the box-shaped optical cable containing part (136) comprises a box body and an optical cable winding cylinder, the optical cable winding cylinder is wound with the temperature/vibration sensing optical cable (12) in a multi-winding way and is nested in the box body, third pin holes are oppositely arranged at the side edge of the optical cable winding cylinder and the two ends of the fourth strip-shaped plate (135), the fourth strip-shaped plate (135) is clung to a carrier roller bracket (22) when being assembled, and the box-shaped optical cable containing part (136) is inserted into the third pin holes through the third pin shafts to fix the temperature/vibration sensing optical cable (12) at the first test point (221) and the fourth test point (224).
9. The system of claim 8, wherein the fourth strip (135) and the cable wrap are metallic heat conductive material and the box is rubber insulation material.
10. The detection system according to claim 1, wherein the optical fiber sensing detection system (1) is continuously arranged behind a first detection point (221) of each group of carrier roller assemblies (21) along a conveying direction of the belt (23) through one of the temperature/vibration sensing optical cables (12), is continuously arranged behind a second detection point (222) of each group of carrier roller assemblies (21) along a conveying reverse direction of the belt (23), is continuously arranged behind a third detection point (223) of each group of carrier roller assemblies (21) along a conveying direction of the belt (23), and is continuously arranged behind a fourth detection point (224) of each group of carrier roller assemblies (21) along a conveying reverse direction of the belt (23).
11. The detection system according to claim 1, wherein the optical fiber sensing detection system (1) is arranged in succession in the conveying direction of the belt (23) through one of the temperature/vibration sensing optical cables (12) behind a first detection point (221), a second detection point (222), a third detection point (223), a fourth detection point (224) of a preceding set of idler assemblies (21), and is folded back behind a fourth detection point (224) of a following set of idler assemblies (21).
12. The detection system according to claim 1, wherein the optical fiber sensing detection system (1) is arranged along the conveying direction of the belt (23) through four temperature/vibration sensing optical cables (12), the first temperature/vibration sensing optical cable (12) is arranged at a first detection point (221) of each group of carrier roller assemblies (21) in series, the second temperature/vibration sensing optical cable (12) is arranged at a second detection point (222) of each group of carrier roller assemblies (21) in series, the third temperature/vibration sensing optical cable (12) is arranged at a third detection point (223) of each group of carrier roller assemblies (21) in series, and the fourth temperature/vibration sensing optical cable (12) is arranged at a fourth detection point (224) of each group of carrier roller assemblies (21) in series.
13. The detection system according to any one of claims 1 to 12, wherein the temperature/vibration sensing optical cable (12) comprises a temperature sensing optical fiber (121) and a vibration sensing optical fiber (122) for detecting temperature data and vibration data, respectively.
14. The detection system according to claim 13, characterized in that the temperature/vibration sensing optical cable (12) is further provided with a stiffening element (123) and a protective structure, the stiffening element (123) being arranged at the central axis of the temperature/vibration sensing optical cable (12), the protective structure encasing the temperature sensing optical fiber (121), vibration sensing optical fiber (122) and stiffening element (123).
15. The detection system according to claim 14, wherein five sets of said temperature/vibration sensing fiber optic cables (12) are employed in a side-by-side arrangement.
16. The detection system according to claim 1, wherein the optical fiber sensing demodulator (14) transmits the obtained temperature and vibration detection data to a fault sensing information database through a temperature/vibration parameter transmission model, the fault sensing information database performs matching analysis on the detection data and the historical fault sensing information, and the intelligent fault recognition system recognizes the fault type according to the matching analysis result.
17. A belt conveyor, characterized in that it has a detection system according to any one of the preceding claims 1 to 16.
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| CN202310727766.9A CN116902534A (en) | 2023-06-19 | 2023-06-19 | Belt conveyor and continuous distributed optical fiber sensing detection system thereof |
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| CN202310727766.9A CN116902534A (en) | 2023-06-19 | 2023-06-19 | Belt conveyor and continuous distributed optical fiber sensing detection system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117383200A (en) * | 2023-12-12 | 2024-01-12 | 石家庄宜中机电技术有限公司 | Belt conveyor on-line monitoring device based on distributed optical fiber vibration monitoring technology |
| CN118025760A (en) * | 2024-04-15 | 2024-05-14 | 中煤科工集团上海有限公司 | Abnormality detection system for belt conveyor |
-
2023
- 2023-06-19 CN CN202310727766.9A patent/CN116902534A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117383200A (en) * | 2023-12-12 | 2024-01-12 | 石家庄宜中机电技术有限公司 | Belt conveyor on-line monitoring device based on distributed optical fiber vibration monitoring technology |
| CN117383200B (en) * | 2023-12-12 | 2024-03-01 | 石家庄宜中机电技术有限公司 | Belt conveyor on-line monitoring device based on distributed optical fiber vibration monitoring technology |
| CN118025760A (en) * | 2024-04-15 | 2024-05-14 | 中煤科工集团上海有限公司 | Abnormality detection system for belt conveyor |
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