CN109051624B - Mining scraper conveyor broken chain monitoring signal acquisition processing system - Google Patents
Mining scraper conveyor broken chain monitoring signal acquisition processing system Download PDFInfo
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- CN109051624B CN109051624B CN201811099076.9A CN201811099076A CN109051624B CN 109051624 B CN109051624 B CN 109051624B CN 201811099076 A CN201811099076 A CN 201811099076A CN 109051624 B CN109051624 B CN 109051624B
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- 238000005065 mining Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000012545 processing Methods 0.000 title claims abstract description 8
- 238000012806 monitoring device Methods 0.000 claims abstract description 46
- 229910001220 stainless steel Inorganic materials 0.000 claims description 37
- 239000010935 stainless steel Substances 0.000 claims description 37
- 239000000758 substrate Substances 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 5
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- 239000000565 sealant Substances 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 description 11
- 238000007789 sealing Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
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- 239000003245 coal Substances 0.000 description 3
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- 239000003292 glue Substances 0.000 description 3
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
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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
- B65G43/06—Control devices, e.g. for safety, warning or fault-correcting interrupting the drive in case of driving element breakage; Braking or stopping loose load-carriers
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Abstract
The invention relates to a signal acquisition and processing system for chain breakage monitoring of a mining scraper conveyor, which comprises a signal processor, a chain breakage monitoring device and a processor shell, wherein the signal processor is connected with the chain breakage monitoring device, and the signal processor is arranged in the processor shell.
Description
Technical Field
The invention relates to the technical field of mining scraper conveyor equipment, in particular to a mining scraper conveyor broken chain monitoring signal acquisition and processing system.
Background
In the operation process of the mining scraper conveyor, the scraper chain of the scraper conveyor can sometimes break due to severe change of external load due to complex working conditions. Since the scraper chain generally consists of two chains, after one chain is broken, the scraper chain can continue to run under the traction of the other chain. While the broken chain may accumulate to a different extent. The piled chains are easy to scrape with the middle groove and are blocked when passing through a narrow space, so that the whole scraper chain cannot run, and further equipment accidents of a larger degree are caused. Therefore, there is a great need for real-time monitoring of the operation of the scraper chain. The existing broken chain monitoring device cannot effectively identify a flat ring and a vertical ring in a chain, so that the accuracy of judging broken chains by a signal processor is low, and in recent years, some universities and equipment manufacturers do partial researches on broken chain monitoring, but in terms of practicality, reliable solutions are not formed yet. The chinese patent publication No. CN105858126B discloses a "flight conveyor chain failure diagnosis system and method", in which the failure diagnosis system is theoretically feasible but difficult to pay for practical use. In addition, the coal face has a severe environment, and is particularly important for protecting electric equipment on the face.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a mining scraper conveyor chain breakage monitoring signal acquisition and processing system that is not easily damaged, can be quickly installed, and has high detection reliability.
The utility model provides a mining scraper conveyor chain breakage monitoring signal acquisition processing system, this system includes signal processor, chain breakage monitoring devices, processor shell, signal processor is connected with chain breakage monitoring devices, signal processor embeds in the processor shell, the processor shell includes casing, apron, three quick-operation joint, ya keli board, the right flank opening of casing has the boss in the casing inboard, the casing is milled out by the stainless steel piece is whole, signal processor fixed mounting is on the boss, the right flank of apron corresponds with the left surface opening shape of casing, the apron left surface sets up into the step along its edge, the inboard peripheral shape of step corresponds with the left surface internal end face shape of body to with apron from its right flank one end lid on the left surface opening of casing, respectively install a quick-operation joint on diapire, preceding lateral wall, the back lateral wall in the casing outside, the quick connector is positioned through screw thread fit and is welded with the shell, the female head of the quick connector is arranged on the inner side of the quick connector in an interference fit installation mode, sealing glue is filled at the joint of the quick connector and the shell, a skylight and an indicator light window are arranged in the middle of a cover plate, an acrylic plate is covered on the skylight and the indicator light window and is detachably connected with the cover plate, a broken chain monitoring device is inserted into a plugboard of a middle groove of the scraper conveyor and comprises a stainless steel matrix, a first Hall sensor and a second Hall sensor, the first Hall sensor and the second Hall sensor are respectively used for detecting flat rings and vertical rings of chains on the left side and the right side of the scraper conveyor and respectively outputting voltage signals representing the flat rings and the vertical rings of the chains on the left side and the right side of the scraper conveyor, and the signal processor comprises a power module, the micro control module comprises a counting module and a judging module, wherein the counting module is used for calculating the real-time quantity of flat rings and vertical rings respectively passing through the first Hall sensor or the second Hall sensor in a preset interval time based on the digital signals output by the converting module, the judging module is used for comparing the real-time quantity of the flat rings and the vertical rings with the rated quantity of the pre-stored flat rings and the vertical rings of the judging module and obtaining whether the left chain or the right chain of the scraper conveyor breaks according to the comparison result, the alarm module executes alarm action based on the information of whether the chain is broken provided by the judging module, the stainless steel substrate is a prolate body with a T-shaped section, the first Hall sensor and the second Hall sensor are mutually arranged on the stainless steel substrate at a certain distance, a first mounting groove is arranged on the stainless steel substrate at the corresponding positions of the first Hall sensor and the second Hall sensor, the first Hall sensor comprises a first permanent magnet, a second permanent magnet, a Hall base, a Hall element and a magnetic guide plate, the first permanent magnet and the second permanent magnet are respectively arranged at the two ends of the first mounting groove corresponding to the positions of the first Hall sensor, the polarities of the ends of the first permanent magnet and the second permanent magnet are opposite, the Hall base is also arranged in the first mounting groove and is arranged at the middle position of the first permanent magnet and the second permanent magnet, the Hall base is a stainless steel block internally provided with the second mounting groove, the Hall element is fixedly arranged in the second mounting groove, the notch of the first mounting groove is covered with a magnetic conduction plate so as to encapsulate the first permanent magnet, the second permanent magnet, the Hall base and the Hall element in the first mounting groove, the magnetic conduction plate points to the upper chain of the left chain, the magnetic conduction plate is fixedly connected with the stainless steel base through a fastening bolt, the second Hall sensor and the first Hall sensor have the same structure and are arranged on the stainless steel base in the same way, the distance between the first Hall sensor and the second Hall sensor is equal to the distance between the left chain and the right chain of the scraper conveyor, the first Hall sensor is positioned between the upper chain and the lower chain of the left chain, the first permanent magnet and the second permanent magnet of the first Hall sensor is positioned at two sides of the lower chain, so that the magnetic field is formed in the special range of the lower chain and the second Hall sensor is positioned at two sides of the lower chain and the special magnetic field sensor is formed between the lower chain and the second chain and the lower chain.
Preferably, the broken chain monitoring device further comprises a cable connector fixedly mounted at the end part of the stainless steel substrate, a wiring groove is formed in the stainless steel substrate, the wiring groove is arranged along the length direction of the stainless steel substrate and is communicated with the second mounting groove, a power line is arranged in the wiring groove, the power line is used for connecting the Hall element with the cable connector, the cable connector is connected with the power module, a signal line is arranged in the wiring groove, and the Hall element is connected with the signal processor through the signal line.
In the invention, the shell is integrally milled by a stainless steel block, corrosion resistance and good tightness are achieved, the skylight and the indicator light window are covered with the acrylic plate, the joint of the quick-connect connector and the shell is filled with sealant, namely, the point of the inner cavity of the shell communicated with the outside is provided with sealing measures, the signal processor arranged in the shell is effectively protected, the left side surface of the cover plate is provided with a step along the edge of the cover plate, thus being beneficial to the quick positioning of the cover plate and the shell during covering so as to meet the requirement of quick installation, the signal input and output of the signal processor and the power connection adopt quick connectors with specific sealing structures, the requirement of underground quick installation is further met, the broken chain monitoring device has high precision and high reliability, can accurately identify the flat ring and the vertical ring in the chain of the mining scraper conveyor, and is based on the richer detection information of the broken chain monitoring device, the invention designs a completely different technical scheme, which is to match the signal processor with a broken chain monitoring device to truly realize the industrial application of the broken chain monitoring function, in the broken chain monitoring device, the first permanent magnet, the second permanent magnet, the Hall base and the Hall element are all intensively placed in a stainless steel matrix, the broken chain monitoring device is inserted into an inserting plate of a middle groove of a scraper conveyor, the design can meet the requirement of convenient installation, and simultaneously realize double protection on the broken chain monitoring device, so that the broken chain monitoring device is not easy to damage, the first Hall sensor and the second Hall sensor are adopted to detect the left chain and the right chain respectively, the polarities of the end parts of the first permanent magnet and the second permanent magnet in the first Hall sensor or the second Hall sensor which are oppositely arranged are opposite, complete magnetic field distribution can be formed, the magnetic field intensity is high, the magnetic conduction plate can shield the interference of the upper chain on the magnetic field, the effective identification of the flat ring and the vertical ring is ensured, and the technical bottlenecks that only the state of a scraper blade can be detected in the prior art, the precision is low and the reliability is poor are solved.
Drawings
Fig. 1 is a logic block diagram of the signal processor.
Fig. 2 is a top view of the chain breakage monitoring device.
Fig. 3 is a cross-sectional view of the chain breakage monitoring device shown in fig. 2 taken along the direction A-A.
Fig. 4 is a cross-sectional view of the chain breakage monitoring device shown in fig. 2 taken along the direction B-B.
Fig. 5 is an isometric view of the processor housing.
Fig. 6 is an isometric view showing the internal structure of the processor housing.
Fig. 7 is a view showing a mounting position of the acrylic plate on the cover plate.
In the figure: the signal processor 10, the power module 11, the signal conditioning module 12, the conversion module 13, the micro-control module 14, the counting module 141, the judging module 142, the alarm module 15, the broken chain monitoring device 20, the stainless steel substrate 21, the wiring groove 211, the first hall sensor 22, the first permanent magnet 221, the second permanent magnet 222, the hall base 223, the hall element 224, the magnetic conductive plate 225, the second hall sensor 23, the cable connector 24, the processor housing 30, the shell 31, the boss 311, the cover plate 32, the quick connector 33, the acrylic plate 34, the left side chain bar 80 and the right side chain bar 90.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, 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 these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1 to 7, the embodiment of the invention provides a mining scraper conveyor chain breakage monitoring signal acquisition and processing system, the processor comprises a signal processor 10, a chain breakage monitoring device 20 and a processor shell 30, wherein the signal processor 10 is connected with the chain breakage monitoring device 20, the signal processor 10 is arranged in the processor shell 30, the processor shell 30 comprises a shell 31, a cover plate 32, three quick connectors 33 and an acrylic plate 34, the right side surface of the shell 31 is opened, a boss 311 is arranged on the inner side of the shell 31, the shell 31 is integrally milled by a stainless steel block, the signal processor 10 is fixedly arranged on the boss 311, the right side surface of the cover plate 32 corresponds to the shape of the left side surface opening of the shell 31, the left side surface of the cover plate 32 is provided with a step along the edge of the cover plate, the shape of the periphery of the inner side surface of the step corresponds to the shape of the inner end surface of the left side surface of the body, so that the cover plate 32 is covered on the left side surface opening of the shell 31 by one end of the right side surface of the cover plate, a quick connector 33 is respectively arranged on the bottom wall, the front side wall and the rear side wall of the outer side of the shell 31, the quick connector 33 is positioned by screw thread fit with the shell 31 and is in welded connection, a female connector of the quick connector is arranged in the inner side of the quick connector in an interference fit installation mode, a sealing glue is filled at the joint of the quick connector and the shell 31, a skylight and an indicator light window are arranged in the middle of the cover plate 32, an acrylic plate 34 is covered on the skylight and the indicator light window and is detachably connected with the cover plate 32, a broken chain monitoring device 20 is inserted into a plugboard of a middle groove of the scraper conveyor, the broken chain monitoring device 20 comprises a stainless steel base 21, a first Hall sensor 22 and a second Hall sensor 23, the first Hall sensor 22 and the second Hall sensor 23 are respectively used for detecting flat rings and vertical rings of chain links of scraper conveyor at the left side and the right side, the signal processor 10 comprises a power module 11, a signal conditioning module 12, a conversion module 13, a micro control module 14 and an alarm module 15, wherein the power module 11 is used for providing working voltages for the conversion module 13, a filtering module, the micro control module 14 and the alarm module 15, the signal conditioning module 12 is used for receiving voltage signals output by the first Hall sensor 22 and the second Hall sensor 23, filtering the voltage signals, transmitting the filtered voltage signals to the conversion module 13, the conversion module 13 is used for converting digital quantities of the received voltage signals output by the first Hall sensor 22 and the second Hall sensor 23 into corresponding digital signals, the micro control module 14 comprises a counting module 141 and a judging module 142, the counting module 141 is used for outputting digital signals based on the conversion module 13, the real-time quantity of the flat rings and the vertical rings respectively passing through the first Hall sensor 22 or the second Hall sensor 23 in a preset interval time is calculated, the judging module 142 is used for comparing the real-time quantity of the flat rings and the vertical rings with the rated quantity of the pre-stored flat rings and the rated rings of the judging module 142, whether the left chain 80 or the right chain 90 of the scraper conveyor breaks or not is obtained according to the comparison result, the alarm module 15 executes alarm action based on the information of whether the chain breaks provided by the judging module 142, the stainless steel substrate 21 is a prolate body with a T-shaped section, the first Hall sensor 22 and the second Hall sensor 23 are mutually arranged on the stainless steel substrate 21 at a certain distance, a first mounting groove is formed in the stainless steel substrate 21 at the corresponding positions of the first Hall sensor 22 and the second Hall sensor 23, and the first Hall sensor 22 comprises a first permanent magnet 221, the second permanent magnet 222, the Hall base 223, the Hall element 224 and the magnetic conduction plate 225, the first permanent magnet 221 and the second permanent magnet 222 are respectively arranged at two ends of the first installation groove corresponding to the position of the first Hall sensor 22, the polarities of the opposite ends of the first permanent magnet 221 and the second permanent magnet 222 are opposite, the Hall base 223 is also arranged in the first installation groove and is arranged at the middle position of the first permanent magnet 221 and the second permanent magnet 222, the Hall base 223 is a stainless steel block internally provided with the second installation groove, the Hall element 224 is fixedly arranged in the second installation groove, the magnetic conduction plate 225 covers the notch of the first installation groove so as to encapsulate the first permanent magnet 221, the second permanent magnet 222, the Hall base 223 and the Hall element 224 in the first installation groove, the magnetic conduction plate 225 points to the upper chain of the left chain 80, the magnetic conduction plate 225 is fixedly connected with the stainless steel matrix 21 through a fastening bolt, the second hall sensor 23 has the same structure as the first hall sensor 22 and is arranged on the stainless steel base 21 in the same way, the distance between the first hall sensor 22 and the second hall sensor 23 is equal to the distance between the left chain 80 and the right chain 90 of the scraper conveyor, the first hall sensor 22 is positioned between the upper chain and the lower chain of the left chain 80, the first permanent magnet 221 and the second permanent magnet 222 of the first hall sensor 22 are positioned at two sides of the lower chain to form a closed magnetic field which is small in range and is special for the lower chain at two sides of the lower chain, the second hall sensor 23 is positioned between the upper chain and the lower chain of the right chain 90, the first permanent magnet and the second permanent magnet of the second hall sensor 23 are positioned at two sides of the lower chain to form a small range at two sides of the lower chain, A closing magnetic field dedicated to the descending chain.
The light box made of acrylic is characterized by good light transmission performance, pure color, rich color, beautiful and smooth appearance, two effects at day and night, long service life, no influence on use and the like.
The first hall sensor 22 is used for detecting whether the left side chain 80 has broken chains, and the second hall sensor 23 is used for detecting whether the right side chain 90 has broken chains.
The alarm module 15 comprises a double-color LED lamp, the micro control module 14 sends a corresponding chain breakage signal to the alarm module 15, after the alarm module 15 receives the chain breakage signal, the alarm module 15 displays in red through the double-color LED lamp, and in the continuous chain breakage state, the alarm module 15 displays in green through the double-color LED lamp.
The alarm module 15 includes a liquid crystal screen, the micro control module 14 sends alarm information to the alarm module 15, and the alarm module 15 displays corresponding alarm information through the liquid crystal screen, and the alarm information can be a specific part of a broken chain, for example.
The hall element 224 is configured to detect that the hall voltage changes with the change of the magnetic field intensity, the stronger the magnetic field, the higher the voltage, and when the scraper passes through the first hall sensor 22 and the second hall sensor 23, the magnetic field caused by the scraper changes, so that the magnetic field between the first permanent magnet 221 and the second permanent magnet 222 changes, and the hall element 224 outputs a voltage signal. The magnetic field changes caused by the flat ring and the standing ring in the chain are too small to be opposed, and therefore, the hall element 224 cannot output a voltage change that distinguishes the flat ring and the standing ring in the chain, and cannot recognize the flat ring and the standing ring in the chain.
In this embodiment, the left chain 80 and the right chain 90 of the scraper conveyor are detected by the first hall sensor 22 and the second hall sensor 23 respectively, the polarities of the opposite ends of the first permanent magnet 221 and the second permanent magnet 222 in the first hall sensor 22 or the second hall sensor 23 are opposite, a complete magnetic field distribution can be formed between the first permanent magnet 221 and the second permanent magnet 222, the hall element 224 is arranged at the center position between the first permanent magnet 221 and the second permanent magnet 222, a complete magnetic field distribution is formed at the position right below the left chain 80 and the right chain 90, compared with the broken chain detection device in the prior art, the magnetic field intensity is high, the flat ring and the vertical ring have different positions and angles, the corresponding magnetic field change intensity is different, so that the hall element 224 can output different voltage signals, the magnetic conduction plate 225 is further arranged between the upper chain and the lower chain of the chain at the same side, the magnetic conduction plate 225 can shield the interference of the upper chain on a magnetic field, effective identification of a flat ring and a vertical ring of the chain at the lower chain is guaranteed, for example, the upper chain is just the flat ring, the lower chain is the vertical ring, the upper chain is just the vertical ring at the later time, the lower chain is the flat ring, thus, the magnetic field changes caused by the sum of the upper chain and the lower chain are exactly the same at the front time and the back time, the voltage signals output by the Hall element 224 are identical, under the condition, the flat ring and the vertical ring cannot be distinguished, and the technical bottlenecks of low detection precision and poor reliability in the prior art are solved, so that the precision and the reliability of chain breakage identification of the scraper conveyor are improved by one height.
The following provides a specific example of the voltage output value of one hall element 224 detected by using an oscilloscope, and according to the output result of the oscilloscope, the voltage value of the vertical ring output by the hall element 224 is 3.0V, the voltage value of the flat ring is 2.7V, the voltage value of the scraper is 3.7V, and the voltage value of the scraper when no object passes is 2.5V, which indicates that the broken chain monitoring device 20 can effectively identify the scraper, the flat ring and the vertical ring.
In the case of individual chain breakage, the number of scrapers passing through the first hall sensor 22 and the second hall sensor 23 remains normal, and the conventional chain breakage monitoring device 20 cannot detect chain breakage because only the state of the scrapers is detected, so that the conventional chain breakage monitoring device 20 has low accuracy and poor reliability. The broken chain monitoring device 20 of the present invention can identify the flat rings and the standing rings, in which case the number of the flat rings and the standing rings passing through the first hall sensor 22 and the second hall sensor 23 is inconsistent with that in the normal case, so that the broken chain can be effectively judged.
The broken chain monitoring device 20 in the embodiment can be directly inserted into a middle trough plugboard of the scraper conveyor according to the requirement, so that the problem of coal flow obstruction is avoided, and the conventional mining scraper conveyor is not required to be modified.
The first permanent magnet 221, the second permanent magnet 222, the hall base 223 and the hall element 224 in the broken chain monitoring device 20 are all arranged in the stainless steel matrix 21 in a centralized manner, so that the whole broken chain monitoring device 20 forms a whole, the broken chain monitoring device 20 can be effectively protected through the complete enveloping design, the broken chain monitoring device 20 can be directly inserted into a special sensor tool through the integral design, the broken chain monitoring device 20 is further prevented from being damaged due to impact of coal blocks and gangue, and replacement after failure of the broken chain monitoring device 20 can be facilitated.
Here, a simple process of determining the broken chain by the determining module 142 in the signal processor 10 is illustrated: in general, the number of flat rings and vertical rings between two adjacent groups of scrapers is rated, and when the number of the flat rings and the vertical rings between the two adjacent groups of scrapers is monitored by the counting module 141 in real time and is inconsistent with the rated number, the possibility of chain breakage is indicated.
A specific calculation method for determining chain breakage by the signal processor 10 is further described below: the calculation method comprises the following steps:
step one: record the time t that the adjacent six scrapers on the left pass through the first hall sensor 22 in turn 1 、t 2 、t 3 、t 4 、t 5 、t 6 And synchronously records the time T when the six adjacent scrapers on the right pass through the second Hall sensor 23 in turn 1 、T 2 、T 3 、T 4 、T 5 、T 6 ；
Step two: according to the calculation formula: calculating the running speeds of the six scrapers on the left side, wherein L is the distance between the two scrapers;
step three: according to the calculation formula: calculating the running speeds of six scrapers on the right side, wherein L is the distance between the two scrapers;
step four: according to the calculation results of the second step and the third step, according to a calculation formula:calculating running speed average values of the left six scrapers and the right six scrapers;
step five: according to the calculation result of the step four, ifIf it is determined that the scraper is in the rated operating state, the process returns to the step one, if +.>The scraper is not in the rated operation state and is downwards executed, wherein V 0 Rated running speed of scraper machine, delta is threshold value;
step six: collecting and recording the number of scrapers, the number of flat rings and the number of standing rings of the left side chain 80 passing through the first Hall sensor 22 in a given time interval delta t in real time, continuously collecting and recording five groups, taking average values A, B, C of the five groups of scrapers, the number of flat rings and the number of standing rings as reference values respectively, collecting and recording the number of scrapers a, the number of flat rings b and the number of standing rings c of the left side chain 80 passing through the first Hall sensor 22 in the given time interval delta t as comparison values,
step seven: according to the calculation result of the step six, if the I A-a I is more than 0.5, the I B-B I is more than 0.5, the I C-C I is more than 0.5, and the calculation result is simultaneously established, judging that the left side chain is broken, and sending chain breakage alarm information, if the I A-a I is more than 0.5, the I B-B I is more than 0.5, and the I C-C I is more than 0.5, and if the I A-a I is not simultaneously established, the left side chain is not broken.
Step eight: collecting and recording the number of scrapers, the number of flat rings and the number of standing rings of the right side chain 90 passing through the second Hall sensor 23 in a given time interval delta t in real time, continuously collecting and recording five groups, taking average values A, B, C of the five groups of scrapers, the number of flat rings and the number of standing rings as reference values respectively, collecting and recording the number of scrapers a, the number of flat rings b and the number of standing rings c of the right side chain 90 passing through the second Hall sensor 23 in the given time interval delta t as comparison values,
step nine: according to the calculation result of the step eight, if the I A-a I is more than 0.5, the I B-B I is more than 0.5, the I C-C I is more than 0.5, and the calculation result is simultaneously established, judging that the chain is broken on the right side, and sending chain breakage alarm information, if the I A-a I is more than 0.5, the I B-B I is more than 0.5, and the I C-C I is more than 0.5, and if the I A-a I is not simultaneously established, the chain is not broken on the right side.
In the invention, the shell 31 is integrally milled by a stainless steel block, corrosion resistance and good tightness are achieved, the skylight and the indicator light window are covered with the acrylic plate 34, the joint of the quick-connect connector and the shell 31 is filled with sealing glue, namely, the point of the inner cavity of the shell 31 communicated with the outside is provided with sealing measures, the signal processor 10 arranged in the shell 31 is effectively protected, the left side surface of the cover plate 32 is provided with steps along the edge of the cover plate, thus being beneficial to the quick positioning of the cover plate 32 and the shell 31 during covering so as to meet the requirement of quick installation, the signal input and output of the signal processor 10 and the power connection are respectively provided with a quick connector 33 with a specific sealing structure, the requirement of quick installation in the pit is further met, the broken chain monitoring device 20 has high precision and high reliability, the flat ring and the vertical ring in the mining scraper conveyor chain can be accurately identified, based on the richer detection information of the broken chain monitoring device 20, the counting module 141 and the broken chain judging module 142 which are internally arranged in the signal processor 10 and combine the time parameters, the number of the flat rings and the number of the vertical rings can accurately and reliably judge whether the broken chain has a broken accident, compared with the existing broken chain fault diagnosis system, the invention designs a completely different technical scheme, the technical scheme is to match the signal processor 10 with the broken chain monitoring device 20 to truly realize the industrial application of the broken chain monitoring function, in the broken chain monitoring device 20 in the invention, the first permanent magnet 221, the second permanent magnet 222, the Hall base 223 and the Hall element 224 are all intensively placed in the stainless steel matrix 21, the broken chain monitoring device 20 is inserted into the plugboard of the middle groove of the scraper conveyor, the design can meet the requirement of convenient installation, and meanwhile, the broken chain monitoring device 20 is doubly protected, the broken chain monitoring device 20 is not easy to damage, the first Hall sensor 22 and the second Hall sensor 23 are adopted to detect the left side chain 80 and the right side chain 90 respectively, the polarities of the end parts of the first permanent magnet and the second permanent magnet which are oppositely arranged in the first Hall sensor 22 or the second Hall sensor 23 are opposite, complete magnetic field distribution can be formed, the magnetic field intensity is high, the magnetic conduction plate 225 can shield the interference of the upper chain on the magnetic field, the effective identification of the flat ring and the vertical ring is ensured, and the technical bottlenecks that in the prior art, only the state of a scraper blade can be detected, the precision is low and the reliability is poor are solved.
Referring to fig. 2, further, the broken chain monitoring device 20 further includes a cable connector 24, the cable connector 24 is fixedly mounted at an end of the stainless steel substrate 21, a wiring groove 211 is provided in the stainless steel substrate 21, the wiring groove 211 is provided along a length direction of the stainless steel substrate 21, the wiring groove 211 is communicated with the second mounting groove, a power line is provided in the wiring groove 211, the power line connects the hall element 224 with the cable connector 24, the cable connector 24 is connected with the power module 11, a signal line is provided in the wiring groove 211, and the signal line connects the hall element 224 with the signal processor 10.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The foregoing disclosure is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the scope of the invention, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the invention as defined by the appended claims.
Claims (1)
1. A mining scraper conveyor chain breakage monitoring signal acquisition processing system is characterized in that: the system comprises a signal processor, a broken chain monitoring device and a processor shell, wherein the signal processor is connected with the broken chain monitoring device, the signal processor is arranged in the processor shell, the processor shell comprises a shell, a cover plate, three quick connectors and an acrylic plate, the right side surface of the shell is opened, a boss is arranged on the inner side of the shell, the shell is integrally milled out of a stainless steel block, the signal processor is fixedly arranged on the boss, the right side surface of the cover plate is corresponding to the shape of the left side surface opening of the shell, the left side surface of the cover plate is provided with a step along the edge of the cover plate, the peripheral shape of the inner side surface of the step is corresponding to the shape of the inner end surface of the left side surface of the body, so that the cover plate is covered on the left side surface opening of the shell by a right side surface end of the cover plate, a quick connector is respectively arranged on the bottom wall, the front side wall and the rear side wall of the outer side of the shell, the quick connector and the shell are positioned through screw thread matching, and welded connection, female joint of quick connector adopts the mode of interference fit installation to arrange in quick connector inboard, is equipped with the sealant in quick connector and casing junction filling, is equipped with skylight, pilot lamp window in the middle part of apron, the yakeli board lid closes on skylight, pilot lamp window to can dismantle with the apron and connect, broken chain monitoring devices inserts in scraper conveyor's the picture peg in middle part groove, broken chain monitoring devices includes the stainless steel base member, first hall sensor, second hall sensor is used for being used for detecting respectively the flat ring of left and right sides scraper conveyor chain, the standing ring, and output respectively and show the flat ring of scraper conveyor left and right sides chain, the voltage signal of standing ring, signal processor includes power module, signal conditioning module, conversion module, micro-control module, the alarm module is used for providing working voltage for the conversion module, the filtering module, the micro-control module and the alarm module, the signal conditioning module is used for receiving voltage signals output by the first Hall sensor and the second Hall sensor, filtering the voltage signals and then sending the filtered voltage signals to the conversion module, the conversion module is used for converting the received voltage signal digital quantity output by the first Hall sensor and the second Hall sensor into corresponding digital signals, the micro-control module comprises a counting module and a judging module, the counting module is used for calculating the real-time quantity of flat rings and vertical rings respectively passing through the first Hall sensor or the second Hall sensor in a preset interval time based on the digital signals output by the conversion module, the judging module is used for comparing the real-time quantity of the flat rings and the vertical rings with the rated quantity of the judging module, obtaining whether a chain or a chain of a right side chain of a scraper conveyor breaks according to the comparison result, the alarm module executes alarm action based on the information of whether the chain breaks or not, the stainless steel matrix is a T-shaped Hall sensor, the first Hall sensor, the second Hall sensor is arranged at a certain distance, a certain distance from the stainless steel matrix is provided with a permanent magnet, and the permanent magnet, the magnetic conduction plate is arranged on the upper chain of the left chain, the magnetic conduction plate is fixedly connected with a stainless steel matrix through a fastening bolt, the second hall sensor and the first hall sensor have the same structure and are arranged on the stainless steel matrix in the same mode, the distance between the first hall sensor and the second hall sensor is equal to the distance between the left chain and the right chain of the scraper conveyor, the first hall sensor is positioned between the upper chain and the lower chain of the left chain, the first permanent magnet and the second permanent magnet of the first hall sensor are positioned on the two sides of the lower chain to form a small range on the two sides of the lower chain, the second hall sensor is specially used for the closed magnetic field of the lower chain, the second hall sensor is positioned on the two sides of the closed magnetic field of the lower chain, and the second hall sensor is positioned on the two sides of the lower chain; the broken chain monitoring device further comprises a cable connector, the cable connector is fixedly arranged at the end part of the stainless steel substrate, a wiring groove is formed in the stainless steel substrate, the wiring groove is arranged along the length direction of the stainless steel substrate and is communicated with the second mounting groove, the cable connector is connected with the power supply module, a signal wire is arranged in the wiring groove, and the signal wire is used for connecting the Hall element with the signal processor.
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| CN201811099076.9A CN109051624B (en) | 2018-09-20 | 2018-09-20 | Mining scraper conveyor broken chain monitoring signal acquisition processing system |
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| CN201811099076.9A CN109051624B (en) | 2018-09-20 | 2018-09-20 | Mining scraper conveyor broken chain monitoring signal acquisition processing system |
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| CN110823258A (en) * | 2019-12-09 | 2020-02-21 | 宁夏天地奔牛实业集团有限公司 | Proximity sensor based on Hall principle |
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