CN109051625B - Broken chain monitoring device of mining scraper conveyor - Google Patents
Broken chain monitoring device of mining scraper conveyor Download PDFInfo
- Publication number
- CN109051625B CN109051625B CN201811099077.3A CN201811099077A CN109051625B CN 109051625 B CN109051625 B CN 109051625B CN 201811099077 A CN201811099077 A CN 201811099077A CN 109051625 B CN109051625 B CN 109051625B
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- Prior art keywords
- chain
- hall sensor
- permanent magnet
- hall
- stainless steel
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 39
- 238000005065 mining Methods 0.000 title claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 30
- 239000010935 stainless steel Substances 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 15
- 230000001174 ascending effect Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 239000011159 matrix material Substances 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000003245 coal Substances 0.000 description 7
- 230000006378 damage Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a broken chain monitoring device of a scraper conveyor for mines, which is inserted into a middle slot plugboard of the scraper conveyor.
Description
Technical Field
The invention relates to the technical field of mining scraper conveyor equipment, in particular to a broken chain monitoring device of a mining scraper conveyor.
Background
Scraper conveyors are important equipment for coal mine conveying operations, and whether they can operate reliably is directly related to safe and efficient production of mines. The working face of the scraper conveyor is fluctuant and changeable when in operation, and the coal quantity is changed along with the change of the conditions of the coal face in underground actual production, so that the load of the conveyor is complex and changeable. If such severe conditions are frequent and long-lived, the chain must be subjected to a great repeated alternating impact load. Under the action of the repeated alternating impact load, the chain is easy to generate low cycle fatigue, weld joint cracking and even cause chain breakage accidents. Meanwhile, after the chain is used for a period of time, as the pitch of the chain ring is continuously increased, the chain is loosened, chain stacking and chain clamping can be caused, even chain breakage accidents, especially chain breakage of a bottom chain, take up 4-16 hours for handling the accidents, the starting rate of a working face is seriously influenced, and the labor intensity for handling the accidents is high.
The chinese patent application No. 200620012363.8 proposes a monitoring solution which requires the installation of a bracket parallel to the blade above the blade and a proximity switch mounted thereon. The problem that this scheme exists is that scraper blade top installing support, has directly hindered the coal flow to pass through, and support and proximity switch directly receive the impact of coal cinder and waste rock, cause the destruction easily. Meanwhile, the scheme only supports the detection of the upper chain scraper, but does not support the detection of the chain and the lower chain scraper chain.
The Chinese patent with the application number 201110052986.3 proposes a detection device for a scraper of a scraper conveyor. The device is characterized in that permanent magnets are arranged on the left ledge and the right ledge of the scraper conveyor, and Hall elements are arranged in a middle plate. The problem that this scheme exists is that scraper conveyor middle part groove's left and right sides ledge and medium plate need reform transform again after cutting, and detection device form solidification after reforming can not modify, and middle part groove bulk strength receives great influence, and this scheme only supports the detection scraper simultaneously.
The Chinese patent with the application number of 201621402128.1 proposes a broken chain monitoring device of a scraper conveyor. The device is characterized in that a groove is formed in a groove plugboard in the middle of a skylight, a Hall sensor, a permanent magnet, a magnetic conduction rod and a signal processing board are arranged in the groove, and a shell is made of nylon. The problem that this scheme exists is that single magnet itself magnetic field intensity is weak, receives the influence of surrounding iron material easily, leads to the picture peg to pack into the middle part groove and opens the skylight back hall element and feel the change of magnetic field, thereby inefficacy.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a broken chain monitoring device for a scraper conveyor for mine, which has high detection accuracy, is not easy to damage, and is convenient to replace.
The broken chain monitoring device comprises a stainless steel matrix, a first Hall sensor and a second Hall sensor, wherein the stainless steel matrix is an oblong body with a T-shaped section, the first Hall sensor and the second Hall sensor are mutually arranged at a certain distance from each other, a first mounting groove is arranged on the stainless steel matrix at the corresponding position 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 conduction plate, the first permanent magnet and the second permanent magnet are respectively arranged at two ends of the first mounting groove corresponding to the position of the first Hall sensor, the first permanent magnet and the second permanent magnet are opposite in polarity, 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 non-mounting block arranged in the second mounting groove, the Hall base is provided with a first mounting groove, the Hall element is arranged at the left side of the same side of the chain, the Hall sensor is arranged on the left side of the chain, the chain is connected with the first Hall element, the magnetic conduction plate is arranged on the left side of the chain, the chain is fixed with the chain, the chain is fixed between the chain is fixed with the chain guide plate, the first hall sensor is located between the ascending section chain and the descending section chain of the left side chain, the first permanent magnet and the second permanent magnet of the first hall sensor are located on two sides of the descending section chain so as to form a closed magnetic field of a small range and special for the descending section chain on two sides of the descending section chain, the second hall sensor is located between the ascending section chain and the descending section chain of the right side chain, and the first permanent magnet and the second permanent magnet of the second hall sensor are located on two sides of the descending section chain so as to form a closed magnetic field of a small range and special for the descending section chain on two sides of the descending section 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, a signal line is arranged in the wiring groove, and the Hall element is connected with the signal processor by the signal line.
Preferably, sealant is filled in the second mounting groove, so as to fix and seal the hall element in the second mounting groove.
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 the stainless steel matrix, the broken chain monitoring device is directly inserted into a special sensor tool, the design can meet the requirement of convenient installation, and meanwhile, double protection is realized on the broken chain monitoring device, so that the broken chain monitoring device is not easy to damage, the left side chain and the right side chain are detected by adopting the first Hall sensor and the second Hall sensor 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 an upper chain on the magnetic field, the effective identification of a flat ring and a vertical ring is ensured, and the technical bottlenecks that only the state of a scraper blade can be detected in the prior art are solved, the precision is low, and the reliability is poor.
Drawings
Fig. 1 is a top view of the mining scraper conveyor broken chain monitoring device.
Fig. 2 is a cross-sectional view of the mining scraper conveyor chain-breaking monitoring device of fig. 1 taken along the direction A-A.
Fig. 3 is a cross-sectional view of the mining scraper conveyor chain-breaking monitoring device of fig. 1 taken along the direction B-B.
In the figure: the broken chain monitoring device 20, the stainless steel base 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 conduction plate 225, the second Hall sensor 23, the cable connector 24, the left side chain 80 and the right side chain 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 3, the embodiment of the invention provides a broken chain monitoring device of a scraper conveyor for mines, the broken chain monitoring device 20 is inserted into a special sensor tool, the special sensor tool is inserted into a middle slot plugboard of the scraper conveyor, the broken chain monitoring device 20 comprises a stainless steel matrix 21, a first hall sensor 22 and a second hall sensor 23, the stainless steel matrix 21 is a rectangular body with a T-shaped section, the first hall sensor 22 and the second hall sensor 23 are mutually arranged on the stainless steel matrix 21 at a certain distance, a first mounting groove is arranged on the stainless steel matrix 21 at the corresponding position of the first hall sensor 22 and the second hall sensor 23, the first hall sensor 22 comprises a first permanent magnet 221, a second permanent magnet 222, a hall base 223, a hall element 224 and a magnetic conduction plate 225, the first permanent magnet 221 and the second permanent magnet 222 are respectively arranged at two ends of the first mounting groove corresponding to the first hall sensor 22, the polarities of the opposite end parts 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 in the middle of the first permanent magnet 221 and the second permanent magnet 222, the Hall base 223 is a stainless steel block with the second installation groove, the Hall element 224 is fixedly arranged in the second installation groove, the notch of the first installation groove is covered with the magnetic conduction plate 225, so that the first permanent magnet 221, the second permanent magnet 222, the Hall base 223 and the Hall element 224 are packaged 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 base 21 through a fastening bolt, the second Hall sensor 23 and the first Hall sensor 22 have the same structure and are arranged on the stainless steel base 21 in the same mode, 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 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, and 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 closed magnetic field which is small in range and special for the lower chain at two sides of the lower chain.
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.
Under the condition of individual broken chains, the number of scrapers passing through the first Hall sensor 22 and the second Hall sensor 23 is still in a normal state, and the broken chains cannot be detected because the conventional broken chain monitoring device only detects the state of the scrapers, so that the conventional broken chain monitoring device has low precision 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.
In the broken chain monitoring device 20, the first permanent magnet 221, the second permanent magnet 222, the Hall base 223 and the Hall element 224 are all arranged in the stainless steel matrix 21 in a concentrated manner, the broken chain monitoring device 20 is directly inserted into a special sensor tool, the design can meet the requirement of convenient installation, meanwhile, double protection is realized for the broken chain monitoring device 20, the broken chain monitoring device 20 is not easy to damage, the left chain 80 and the right chain 90 are detected by adopting the first Hall sensor 22 and the second Hall sensor 23 respectively, the polarities of the 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 which are oppositely arranged 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 a flat ring and a vertical ring is ensured, and the technical bottlenecks that in the prior art, only the state of a scraper is detected, the precision is low, and the reliability is poor are solved.
Referring to fig. 1, 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, a signal line is provided in the wiring groove 211, and the signal line connects the hall element 224 with the signal processor.
Further, a sealant is filled in the second mounting groove to fix and seal the hall element 224 in the second mounting groove.
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. The utility model provides a mining scraper conveyor broken chain monitoring devices which characterized in that: the broken chain monitoring device is inserted into a special sensor tool, the special sensor tool is inserted into a middle groove plugboard of a scraper conveyor, the broken chain monitoring device comprises a stainless steel substrate, a first Hall sensor and a second Hall sensor, 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 conduction plate, the first permanent magnet and the second permanent magnet are respectively arranged at 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 which are oppositely arranged are opposite, the Hall base is a stainless steel block with the second mounting groove arranged therein, the Hall element is fixedly mounted 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 is arranged towards the upper chain of the left chain, the magnetic conduction plate is fixedly connected with the stainless steel substrate through a fastening bolt, the second Hall sensor and the first Hall sensor have the same structure and are mounted on the stainless steel substrate 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 side chain of the scraper conveyor, and the first Hall sensor is positioned on the upper chain of the left side chain, the first permanent magnet and the second permanent magnet of the first Hall sensor are positioned at two sides of the descending chain so as to form a closed magnetic field which is small in range and special for the descending chain at two sides of the descending chain, the second Hall sensor is positioned between the ascending chain and the descending chain of the right side chain, and the first permanent magnet and the second permanent magnet of the second Hall sensor are positioned at two sides of the descending chain so as to form a closed magnetic field which is small in range and special for the descending chain at two sides of the descending chain; the broken chain monitoring device further comprises a cable connector, wherein 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, a signal wire is arranged in the wiring groove, and the signal wire is used for connecting the Hall element with the signal processor; and sealant is filled in the second mounting groove and used for fixing and sealing the Hall element in the second mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099077.3A CN109051625B (en) | 2018-09-20 | 2018-09-20 | Broken chain monitoring device of mining scraper conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099077.3A CN109051625B (en) | 2018-09-20 | 2018-09-20 | Broken chain monitoring device of mining scraper conveyor |
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| Publication Number | Publication Date |
|---|---|
| CN109051625A CN109051625A (en) | 2018-12-21 |
| CN109051625B true CN109051625B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811099077.3A Active CN109051625B (en) | 2018-09-20 | 2018-09-20 | Broken chain monitoring device of mining scraper conveyor |
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| CN (1) | CN109051625B (en) |
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