CN212558168U - Chain tension monitoring and fracture early warning system of scraper conveyor - Google Patents
Chain tension monitoring and fracture early warning system of scraper conveyor Download PDFInfo
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- CN212558168U CN212558168U CN202020889701.6U CN202020889701U CN212558168U CN 212558168 U CN212558168 U CN 212558168U CN 202020889701 U CN202020889701 U CN 202020889701U CN 212558168 U CN212558168 U CN 212558168U
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Abstract
The utility model discloses a scraper conveyor chain tension monitoring and fracture early warning system, the technical field of coal mine transportation, the system comprises a light source emitter, a photosensitive element, a wireless transmitting module, a wireless receiving module, a signal processing module, an encoder and an early warning module; the system carries out data integration processing after transmission through signals measured by a light source emitter, a photosensitive element and an encoder, monitors the length change of each chain link, and can judge whether the chain is damaged or not by comparing the length change with the length of the chain calibrated in advance; the utility model discloses can realize the real-time supervision of chain stress state, can accurately judge whether the chain link takes place to destroy, have simple structure, with low costs, easy operation rapidly, efficient, install advantages such as simple and convenient, measuring result is accurate.
Description
Technical Field
The utility model relates to a scraper conveyor field, concretely relates to scraper conveyor chain tension monitoring and fracture early warning system.
Background
The scraper conveyor, the coal mining machine and the hydraulic support are main devices of a fully mechanized mining face, and the cooperative control of three machines is a key technology of fully mechanized mining automation. The scraper conveyor is used as key equipment for mechanized coal mining of a fully mechanized mining face, and plays important roles of conveying coal, providing a running track for a coal mining machine and providing a pushing fulcrum for a hydraulic support, and the performance, the service life and the reliability of the scraper conveyor restrict normal exertion of other equipment capacity, and determine the production capacity and the economic benefit of high-yield and high-efficiency fully mechanized mining face mining. The working principle of the scraper conveyor determines that the scraper conveyor needs to bear the effects of tension and compression, local bending, time-varying load, impact and the like in the running process, and the severe working environment causes the key parts of the scraper conveyor to have serious corrosion phenomena, so that the scraper conveyor is easy to have chain breakage accidents. Once a chain breakage accident occurs, normal production of a coal face is influenced, and great threat is brought to life safety of workers along the line. Therefore, in order to avoid damage to the scraper conveyor caused by chain breakage and prevent casualties, the method has important practical significance for timely and effectively detecting the chain breakage of the scraper conveyor. Meanwhile, the scraper conveyor has a chain at the loaded section which bears a large load, and the tension monitoring of the chain at the loaded section is also very important.
Chinese patent application CN107777288A discloses a real-time monitoring system and a monitoring method for chain breakage of a scraper conveyor, wherein strain gauges are pasted on flat chains in scraper chain grooves, and chain tension signals are acquired through data transmission nodes. The disadvantages of this solution are: 1. according to the scheme, grooves are formed in the scraper and lead holes are drilled in the scraper, so that the mechanical property of the scraper is damaged, the reliability and the bearing capacity of the scraper are reduced, the existing standard scraper is structurally modified, the manufacturing cost of the scraper is increased, and the scraper is not beneficial to large-scale popularization and use; 2. according to the scheme, the strain gauge is attached to a flat chain in a chain groove of a scraper, and the strain gauge is collided by the scraper in normal work of a scraper machine, so that signal data acquired by the scheme is inaccurate; 3. according to the scheme, a plurality of strain gauges are required to be attached to one scraper conveyor, and a plurality of data transmission nodes and positioning modules are used, so that the cost is high.
SUMMERY OF THE UTILITY MODEL
The technique that exists is not enough to the aforesaid, the utility model aims at providing a scraper conveyor chain tension monitoring and fracture early warning system, its with low costs, monitoring effect are good and easily install, can realize carrying out effective monitoring to colliery scraper conveyor's chain status information in the pit, guarantee colliery safety in the pit production.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a scraper conveyor chain tension monitoring and fracture early warning system, which comprises a light source emitter, a photosensitive element, a wireless emitting module, a wireless receiving module, a signal processing module, an encoder and an early warning module;
the light source emitter and the photosensitive element are respectively arranged on the inner walls of two side plates of the machine head of the scraper conveyor, and the light source emitter, the photosensitive element and the meshing point of a chain and a chain wheel in the scraper conveyor are horizontally coplanar;
the wireless transmitting module, the wireless receiving module, the early warning module and the signal processing module are all fixed on the outer wall of the same side plate with the photosensitive element;
the encoder is fixed on a rotating shaft of the scraper conveyor;
the encoder, the photosensitive element, the wireless transmitting module, the wireless receiving module and the early warning module are respectively electrically connected with the signal processing module.
Preferably, the early warning module comprises a display device capable of displaying chain tension information and an early warning horn capable of sending out an alarm signal.
Preferably, a line between the light source emitter and the photosensitive element is perpendicular to the chain.
Preferably, the encoder is fixed on the outer wall of the end part of the rotating shaft extending out of the side plate.
The beneficial effects of the utility model reside in that: the utility model can monitor the stress state of the chain in real time and accurately judge whether the chain is damaged; the problem that the chain breakage monitoring device of the existing single-chain scraper conveyor is unreliable is solved; the engineering problem of chain breakage and chain breakage monitoring of the single-chain scraper is effectively solved; the device has the advantages of simple structure, low cost, simple and rapid operation, high efficiency, simple and convenient installation and accurate measurement result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a drawing showing the installation of the components of the scraper conveyor according to the embodiment of the present invention;
fig. 2 is a mounting diagram (plan view) of the position of each component on the scraper conveyor disclosed by the embodiment of the invention;
FIG. 3 is a schematic structural view of a hollow chain part and a solid chain part disclosed in the embodiment of the present invention;
fig. 4 is a diagram illustrating the installation positions of the light source emitter and the photosensitive element according to an embodiment of the present invention;
fig. 5 is a schematic view of the chain tension monitoring and fracture early warning process disclosed in the embodiment of the present invention.
In the figure:
1-a light source emitter; 2-a photosensitive element; 4-an encoder; 9-a wireless transmitting module; 11-side plate; 12-a chain; 13-a sprocket; 14-a rotating shaft; 15-chain hollow part; 16-solid chain portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 5, a scraper conveyor chain tension monitoring and fracture early warning system comprises a light source emitter 1, a photosensitive element 2, a wireless emitting module 9, a wireless receiving module, a signal processing module, an encoder 4 and an early warning module;
the light source emitter 1 and the photosensitive element 2 are respectively arranged on the inner walls of two side plates 11 of a machine head of the scraper conveyor, and the light source emitter 1, the photosensitive element 2 and the meshing point of a chain 12 and a chain wheel 13 in the scraper conveyor are horizontally coplanar; the light signal emitted by the light source emitter 1 passes through the meshing point of a scraper conveyor chain 12 and a chain wheel 13 to vertically irradiate on the photosensitive element 2, and the photosensitive element 2 forms a high-low level signal in the signal processing module when the length of a hollow chain part 15 and a solid chain part 16 changes when the chain 12 runs;
the wireless transmitting module 9, the wireless receiving module, the early warning module and the signal processing module are all fixed on the outer wall of the same side plate 11 together with the photosensitive element 2; the wireless transmitting module 9 receives the high and low level signals generated by the signal processing module and wirelessly transmits the high and low level signals to the wireless receiving module;
the signal processing module is electrically connected with the wireless receiving module, receives the electric signals transmitted by the wireless receiving module and analyzes and processes the electric signals to obtain the movement time of the solid chain part 16 and the hollow chain part 15;
the encoder 4 is fixed on a rotating shaft 14 of the scraper conveyor; the encoder 4 is used for measuring the speed of the chain 12 and transmitting the speed to the signal processing module, and the signal processing module is combined with the obtained movement time of the solid chain part 16 and the hollow chain part 15 to obtain the length of the solid chain part 16 and the hollow chain part 15;
the encoder 4, the photosensitive element 2, the wireless transmitting module 9, the wireless receiving module and the early warning module are respectively and electrically connected with the signal processing module.
The early warning module comprises a display device capable of displaying chain tension information and an early warning horn capable of sending out an alarm signal.
The line between the light source emitter 1 and the photosensitive element 2 is perpendicular to the chain 12.
The encoder 4 is fixed on the outer wall of the end part of the rotating shaft 14 extending out of the side plate 11.
The photosensitive element 2 uses a GL7516 photo resistor.
The signal processing module comprises a signal amplifier, an A/D converter with model number PCF8591 and a raspberry pi 4B.
The encoder 4 is model E6B2-CWZ5B (PNP).
The model of the wireless transmitting module 9 and the wireless receiving module is 433 receiving + the transmitting module 433.92MHZ frequency wireless transmitting and receiving.
The early warning module comprises a display device capable of displaying chain tension information and an early warning horn capable of sending out an alarm signal, and the display device selects a 10-inch Raspberry Pi touch screen LCD.
The embodiment also provides a method of the chain tension monitoring and fracture early warning system for the scraper conveyor, which comprises the following steps:
step one, during no-load, measuring a scraper chainThe length L of the chain hollow 15 of the pair of horizontal and vertical rings of the bar 121And length L of solid portion 16 of chain2(ii) a According to the theory of mechanics correlation, the length L of the hollow part 15 of the chain is calculated1And length L of solid portion 16 of chain2Limiting the length at which elastic deformation (i.e., the critical point of elastic deformation and plastic deformation) occurs and setting a threshold d1And d2。
Step two, when the scraper conveyor normally runs, the light source emitter 1 and the photosensitive element 2 are used for converting the length change of the hollow chain part 16 and the solid chain part 16 into the change of high and low levels, and further the movement time t of the hollow chain part 15 is obtained1And time t of movement of solid chain portion 162(ii) a At the same time, the speed V-t waveform of the chain 12 is obtained by the encoder 4.
Step three, combining the speed V-t wave form diagram of the chain 12 in the step two with the movement time t of the hollow part 15 of the chain1And time t of movement of solid chain portion 162The signal processing module is used for carrying out speed-time integration to respectively obtain the length l of the chain hollow part 15 in actual work1And length l of solid chain portion 162The formula is as follows:
step four, according to l obtained in step three1And l2And in step one the length L of the hollow part 15 of the chain bar1And length L of solid portion 16 of chain2The change DeltaL of the chain hollow section length 15 during operation of the chain 12 can be determined separately1And change in length Δ L of the solid portion 16 of the chain2Further, the tension F of the chain hollow part 15 can be calculated1And tension F of solid chain portion 162(ii) a The formula is as follows:
in the formula:
e-modulus of elasticity;
s-chain unilateral circular shaft cross section area.
Step five, displaying the tension F in real time by the display device1And F2And length l1And l2When the value of l changes1＜d1And l2＜d2When the scraper is in normal operation, when1≥d1Or l2≥d2And sending an early warning signal that the scraper chain ring is about to enter plastic deformation, and prompting to immediately stop the operation of the scraper conveyor and carry out corresponding ring maintenance work.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides a scraper conveyor chain tension monitoring and fracture early warning system which characterized in that: the system comprises a light source emitter (1), a photosensitive element (2), a wireless emitting module (9), a wireless receiving module, a signal processing module, an encoder (4) and an early warning module;
the light source emitter (1) and the photosensitive element (2) are respectively arranged on the inner walls of two side plates (11) of a machine head of the scraper conveyor, and the light source emitter (1), the photosensitive element (2) and the meshing point of a chain (12) and a chain wheel (13) in the scraper conveyor are horizontally coplanar;
the wireless transmitting module (9), the wireless receiving module, the early warning module and the signal processing module are all fixed on the outer wall of the same side plate (11) with the photosensitive element (2);
the encoder (4) is fixed on a rotating shaft (14) of the scraper conveyor;
the encoder (4), the photosensitive element (2), the wireless transmitting module (9), the wireless receiving module and the early warning module are respectively electrically connected with the signal processing module.
2. The scraper conveyor chain tension monitoring and breakage warning system of claim 1, wherein: the early warning module comprises a display device capable of displaying chain tension information and an early warning horn capable of sending out an alarm signal.
3. The scraper conveyor chain tension monitoring and breakage warning system of claim 1, wherein: the connecting line between the light source emitter (1) and the photosensitive element (2) is perpendicular to the chain (12).
4. The scraper conveyor chain tension monitoring and breakage warning system of claim 1, wherein: the encoder (4) is fixed on the outer wall of the end part of the rotating shaft (14) extending out of the side plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889701.6U CN212558168U (en) | 2020-05-25 | 2020-05-25 | Chain tension monitoring and fracture early warning system of scraper conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889701.6U CN212558168U (en) | 2020-05-25 | 2020-05-25 | Chain tension monitoring and fracture early warning system of scraper conveyor |
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| CN212558168U true CN212558168U (en) | 2021-02-19 |
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| CN202020889701.6U Expired - Fee Related CN212558168U (en) | 2020-05-25 | 2020-05-25 | Chain tension monitoring and fracture early warning system of scraper conveyor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114419852A (en) * | 2021-12-27 | 2022-04-29 | 天地科技股份有限公司 | Offset judgment and grading early warning method and device for scraper conveyor |
| CN117184815A (en) * | 2023-10-08 | 2023-12-08 | 江苏数科科技研究发展有限责任公司 | Industrial and mining equipment monitoring and early warning device based on industrial Internet of things |
| CN117421620A (en) * | 2023-12-18 | 2024-01-19 | 北京云摩科技股份有限公司 | Interaction method of tension state data |
-
2020
- 2020-05-25 CN CN202020889701.6U patent/CN212558168U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114419852A (en) * | 2021-12-27 | 2022-04-29 | 天地科技股份有限公司 | Offset judgment and grading early warning method and device for scraper conveyor |
| CN114419852B (en) * | 2021-12-27 | 2024-02-23 | 天地科技股份有限公司 | Scraper conveyor deviation judging and grading early warning method and device |
| CN117184815A (en) * | 2023-10-08 | 2023-12-08 | 江苏数科科技研究发展有限责任公司 | Industrial and mining equipment monitoring and early warning device based on industrial Internet of things |
| CN117184815B (en) * | 2023-10-08 | 2024-04-19 | 江苏数科科技研究发展有限责任公司 | Industrial and mining equipment monitoring and early warning device based on industrial Internet of things |
| CN117421620A (en) * | 2023-12-18 | 2024-01-19 | 北京云摩科技股份有限公司 | Interaction method of tension state data |
| CN117421620B (en) * | 2023-12-18 | 2024-02-27 | 北京云摩科技股份有限公司 | Interaction method of tension state data |
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Granted publication date: 20210219 |