CN111994591A - Deviation early warning emergency stop device and method for conveying belt of belt conveyor - Google Patents
Deviation early warning emergency stop device and method for conveying belt of belt conveyor Download PDFInfo
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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
- 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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- 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)
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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)
- B65G2203/0283—Position of the load carrier
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Abstract
The invention provides a deviation early warning emergency stop device and a deviation early warning emergency stop method for a conveying belt of a belt conveyor, wherein the device comprises the following components: the device comprises a deviation detection unit for detecting whether a conveying belt of a target belt conveyor deviates, a position communication unit for receiving a detection result of the deviation detection unit and performing communication, and an early warning emergency stop unit for receiving information transmitted by the position communication unit and performing corresponding processing according to the information, wherein the device is provided with a plurality of deviation detection units and position communication units along the length direction of the conveying belt according to preset distances, and the deviation detection units correspond to the position communication units one by one. The deviation of the conveying belt is detected in a correlation ultrasonic non-contact mode, the influence of dust and mist on an operation site is avoided, and the detection is reliable. The device has the function of identifying the deviation position of the conveying belt, and is convenient for maintenance personnel to quickly position the deviation of the long-distance conveying belt. The passive contact output interface is provided, and the passive contact output interface can be linked with a control system of the belt conveyor to ensure the safe operation of the belt conveyor.
Description
Technical Field
The invention relates to the technical field of belt conveyor fault detection, in particular to a deviation early warning emergency stop device and method for a conveyor belt of a belt conveyor.
Background
The belt conveyor is widely used for bulk material transportation in the fields of mines, coal-fired power plants, ports, docks and the like. The belt conveyor is easy to cause the deviation of the conveying belt in the operation process due to various reasons such as installation error, uneven material receiving, operation vibration and the like, so that the materials are scattered, the operation resistance is increased, the energy consumption of the conveyor is increased, and the edge of the conveying belt is abraded, torn and even scrapped in severe cases. At present, a mechanical contact type deviation detection probe rod is easily worn by a conveying belt or damaged by material impact at the edge of the conveying belt, and deviation detection in a photoelectric type and image recognition mode is easily affected by dust and fog to cause detection failure. The conveyor belt deviation detection emergency stop device applied by Wangyu of the Limited liability company of heavy industry machinery of Anhui province needs to arrange a magnetic central line on the central line of the conveyor belt, so that the realization difficulty is high; and a sensing detection unit is required to be arranged on each carrier roller, so that the cost is high; the power supply problem of each sensing unit is not considered. The ultrasonic-based belt monitoring and alarming device applied by Liu Yi, etc. of China mining university judges whether the belt deviates or not through measuring the distance between the sensor and the belt, the ultrasonic distance measurement precision is low, the echo is easy to be interfered, the measurement result is incorrect, the detection speed is slow due to the fact that multiple times of calculation are needed, and the problems of automatic allocation and identification of equipment addresses of deviation positions are not considered.
Therefore, a new device and method for monitoring belt deflection of a belt conveyor is needed.
Disclosure of Invention
In view of the above, the invention provides a deviation early warning emergency stop device and method for a conveying belt of a belt conveyor.
The invention provides a deviation early warning emergency stop device for a conveying belt of a belt conveyor, which is characterized in that: the method comprises the following steps: the device comprises a deviation detection unit, a position communication unit and an early warning emergency stop unit, wherein the deviation detection unit is used for detecting whether a conveying belt of a target belt conveyor deviates or not, the position communication unit is used for receiving a detection result of the deviation detection unit and performing communication, the early warning emergency stop unit is used for receiving information transmitted by the position communication unit and performing corresponding processing according to the information, the device is provided with a plurality of deviation detection units and position communication units according to a preset distance in the length direction of the conveying belt, and the deviation detection units correspond to the position communication units one by one;
the deviation detection unit comprises a sub-detection module I and a sub-detection module II which are arranged along the width direction of the conveying belt in a facing mode, the detection module I and the sub-detection module II respectively comprise a correlation type ultrasonic proximity switch and a mounting bracket for supporting the correlation type ultrasonic proximity switch, a gap is formed between an ultrasonic transmission path of the correlation type ultrasonic proximity switch and the edge of the conveying belt, and ultrasonic waves of the correlation type ultrasonic proximity switch are perpendicular to the plane of the belt surface of the conveying belt;
and the output ends of the sub-detection module I and the sub-detection module II are connected with the position communication unit.
Further, the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module I and the edge of the conveyor belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module II and the edge of the conveyor belt;
the sub-detection module I is used for detecting slight deviation, and the sub-detection module II is used for detecting severe deviation;
or the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module II and the edge of the conveyor belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module I and the edge of the conveyor belt.
The sub-detection module II is used for detecting slight deviation, and the sub-detection module I is used for detecting severe deviation.
Further, the early warning emergency stop unit is arranged at the head end of the belt conveyor.
Further, the position communication unit includes power module, dial-up setting module, higher level communication module, subordinate communication module, signal acquisition module and central processing module, signal acquisition module is used for gathering correlation formula ultrasonic wave proximity switch's signal and will signal transmission gives central processing module, signal acquisition module and dial-up setting module's output all with central processing module's being connected, higher level communication module and subordinate communication module all with central processing module communication connection, power module is used for providing the power consumption of work for central processing module, the signal output part of sub-detection module I and the signal output part of sub-detection module II all with signal acquisition module's input is connected.
Furthermore, the early warning emergency stop unit comprises an audible and visual alarm module, a communication module, a passive contact output module and a control processing module, wherein the input end of the audible and visual alarm module and the input end of the passive contact output module are both connected with the output end of the control module, the power supply module is used for supplying working power to the control processing module, the control processing module is in communication connection with the communication module, and the output end of the passive contact output module is connected with a control system of the belt conveyor.
Further, according to any one of the belt conveyor conveyer belt off tracking early warning scram device of claim 4 or 5, characterized in that:
the position communication unit also comprises a display module I, and the input end of the display module is connected with the output end of the central processing module;
the early warning emergency stop unit further comprises a display module II, and the input end of the display module is connected with the output end of the control processing module.
Correspondingly, the invention also provides a deviation early warning emergency stop method for the conveying belt of the belt conveyor, which is characterized in that: the device is suitable for the deviation early warning emergency stop device of the conveying belt of the belt conveyor in any one of claims 1 to 6, and comprises: an address automatic allocation stage and a deviation early warning emergency stop stage;
the address automatic allocation section includes:
after the early warning emergency stop unit is powered on, starting from a position communication unit closest to the head of the belt conveyor, setting distribution addresses for the position communication units of the device in sequence along the direction from the head to the tail of the belt conveyor until the last position communication unit receives address distribution information;
after receiving the address allocation information, the last position communication unit sends a message step by step along the direction from the tail of the belt conveyor to the head of the belt conveyor until the message is transmitted to the early warning emergency stop unit;
when communication abnormity occurs at a certain level in the address allocation process, the position communication unit at the position with abnormal communication transmits the abnormal information to the early warning emergency stop unit, the abnormal information is displayed by a display module of the early warning emergency stop unit, and audible and visual alarm is given to remind an operator of handling the communication abnormity;
the deviation scram stage comprises the following steps:
when the conveying belt deviates and shields the ultrasonic transmission path of the correlation type ultrasonic proximity switch of the sub-detection module I or the sub-detection module II, the corresponding sub-detection module sends the deviation information of the conveying belt to the position communication unit corresponding to the sub-detection module;
when receiving the deviation information of the conveying belt, the position communication unit transmits the deviation and the position information of the conveying belt to the early warning emergency stop unit step by step;
when the early warning emergency stop unit receives the conveying belt deviation information transmitted by the position communication unit, judging whether the conveying belt deviation is slight deviation, if so, generating acousto-optic alarm information to remind an operator to pay attention, and if not, generating acousto-optic alarm information and outputting a passive contact alarm signal;
and in the deviation emergency stop stage, if communication abnormity occurs at a certain stage in the communication process, the communication abnormity position information is transmitted to the early warning emergency stop unit, the display module of the early warning emergency stop unit displays the communication abnormity, and audible and visual alarm is given to remind an operator to process the communication abnormity.
The invention has the beneficial technical effects that: the deviation of the conveying belt is detected in a correlation ultrasonic non-contact mode, the influence of dust and mist on an operation site is avoided, and the detection is reliable. The device has the function of identifying the deviation position of the conveying belt, and is convenient for maintenance personnel to quickly position the deviation of the long-distance conveying belt. The passive contact output interface is provided, and the passive contact output interface can be linked with a control system of the belt conveyor to ensure the safe operation of the belt conveyor.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of a location communication unit according to the present invention.
Fig. 4 is a schematic structural diagram of the early warning emergency stop unit of the present invention.
In fig. 1, a 1-correlation ultrasonic proximity switch, a 2-correlation ultrasonic proximity switch mounting bracket, a 3-up belt, a 4-conveyer belt rack, a 5-down belt, a 6-position communication unit bracket and a 7-position communication unit.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
the invention provides a deviation early warning emergency stop device for a conveying belt of a belt conveyor, which is characterized in that: as shown in fig. 2, includes: the device comprises a deviation detection unit, a position communication unit and an early warning emergency stop unit, wherein the deviation detection unit is used for detecting whether a conveying belt of a target belt conveyor deviates or not, the position communication unit is used for receiving a detection result of the deviation detection unit and performing communication, the early warning emergency stop unit is used for receiving information transmitted by the position communication unit and performing corresponding processing according to the information, the device is provided with a plurality of deviation detection units and position communication units according to a preset distance in the length direction of the conveying belt, and the deviation detection units correspond to the position communication units one by one; the technicians in the field can set the actual spacing of the deviation detection units along the length direction of the conveyer belt according to the actual length of the conveyer belt and the precision requirement of the deviation of the conveyer belt in engineering, such as 10 meters, 20 meters, 100 meters and the like;
as shown in fig. 2, the deviation detecting unit includes a sub-detecting module i and a sub-detecting module ii which are arranged along the width direction of the conveying belt and face to face, the detecting module i and the sub-detecting module ii both include a correlation ultrasonic proximity switch and a mounting bracket for supporting the correlation ultrasonic proximity switch, a gap is arranged between an ultrasonic transmission path of the correlation ultrasonic proximity switch and the edge of the conveying belt, and ultrasonic waves of the correlation ultrasonic proximity switch are perpendicular to the plane of the belt surface of the conveying belt; fig. 1 shows an embodiment of the present invention. Ultrasonic proximity switches, can detect anything within 2.5cm to 10 m. The ultrasonic proximity switch is used for detecting objects with different materials, shapes, colors or concentrations, and has excellent accuracy, flexibility and reliability. The application range is very wide. Whether level or height measurements, distance measurements or bottle count, whether 2.5cm or 10m, objects of various characteristics can be detected. And may be a solid, liquid, powder, or even a transparent object. The detection is independent of the nature of the surface, which may be rough or smooth, clean or dirty, wet or dry. The proximity switch sensor is very robust and insensitive to dirt, ambient light or noise. The deviation of the conveying belt is detected in a correlation ultrasonic non-contact mode, the influence of dust and mist on an operation site is avoided, and the detection is reliable.
And the output ends of the sub-detection module I and the sub-detection module II are connected with the position communication unit.
The conveying belt deviates, and a gap between the edge of the conveying belt and an ultrasonic transmission path of the correlation type ultrasonic proximity switch of the sub-detection module is shielded by the deviating conveying belt, so that the receiving end cannot receive ultrasonic waves sent by the transmitting probe, and the deviating position is sent to the early warning emergency stop unit by the position communication unit. And (4) real-time detection, and once deviation is reported, the situation is prevented from being further expanded.
In this embodiment, the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module i and the edge of the conveyor belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module ii and the edge of the conveyor belt;
the sub-detection module I is used for detecting slight deviation, and the sub-detection module II is used for detecting severe deviation;
or the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module II and the edge of the conveyor belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module I and the edge of the conveyor belt.
The sub-detection module II is used for detecting slight deviation, and the sub-detection module I is used for detecting severe deviation.
The technical personnel in the field can set the distance between the transmission path of the correlation ultrasonic wave of the sub-detection module and the edge of the transmission belt according to the requirement of the actual precision of engineering, the distance between the sub-detection module I and the sub-detection module II is set to be one large and one small, namely two threshold values of the deviation of the transmission belt are set, when the deviation amplitude of the transmission belt exceeds a small threshold value but exceeds a large threshold value, namely the transmission belt is in slight deviation, only warning information is sent at the moment, the transmission belt is overhauled or adjusted in non-working time, and the delay of the operation of the transmission belt is avoided; when the deviation super-amplitude of the conveying belt is larger than a larger threshold value, namely the conveying belt is in heavy deviation, the operation of the conveying belt is forcibly stopped while warning information needs to be sent out, and the situation is prevented from being further expanded. Through the setting of a big threshold value and a small threshold value, intervention of different degrees can be adopted aiming at deviation of different degrees, and the operation and the situation development control of the conveying belt are facilitated. In the embodiment, the sub-detection modules I and the sub-detection modules II on the same side of the conveying belt are arranged in a staggered mode along the length direction of the conveying belt, so that the conveying belt can be detected in time when the conveying belt deviates leftwards or rightwards, and the stability of the conveying belt is improved.
In this embodiment, the early warning emergency stop unit is disposed at the head end of the belt conveyor. The early warning emergency stop unit arranged on the machine head is convenient for the output of the passive contact to communicate with the control system of the belt conveyor in time, so that the reaction time is shortened, and the reaction efficiency is improved.
In this embodiment, the position communication unit includes power module, dial-up setting module, higher level communication module, subordinate communication module, signal acquisition module and central processing module, signal acquisition module is used for gathering correlation formula ultrasonic wave proximity switch's signal and will signal transmission gives central processing module the output of signal acquisition module and dial-up setting module all with central processing module's being connected, higher level communication module and subordinate communication module all with central processing module communication connection, power module is used for providing the power consumption of work for central processing module, the signal output part of sub-detection module I and the signal output part of sub-detection module II all with signal acquisition module's input is connected. The sensor detection module is an ultrasonic sensor, namely a correlation type ultrasonic proximity switch, and the power supply module, the dial setting module, the superior communication module, the inferior communication module, the signal acquisition module and the central processing module are all conventional products and are not described again; the dial setting module is used for setting the working mode of the position communication unit, and can be set into 2 working modes, which are respectively: and in the normal mode and the communication terminal mode, the last position communication unit along the conveying belt from the machine head to the machine tail is set to work in the communication terminal mode through dialing, and the condition that no subsequent position communication unit exists is shown. Through the one-to-one correspondence of the position communication unit and the deviation detection unit, the deviation position of the conveying belt can be positioned through the position communication unit, and the maintenance and the detection are convenient. In this embodiment, the dial switch of the dial setting module of the last position communication unit dials to one side to indicate that the last position communication unit is the position communication unit, and the dial setting modules of the other position communication units dial to the other side to indicate that the middle position communication unit is the position communication unit, i.e., the non-last position communication device. By the state of the dial switch of the dial setting module, the automatic address allocation can know which position communication unit is the last device, and the system can also know whether the communication is normal.
In this embodiment, the early warning emergency stop unit includes an audible and visual alarm module, a communication module, a passive contact output module and a control processing module, an input end of the audible and visual alarm module and an input end of the passive contact output module are both connected with an output end of the control module, the power supply module is used for supplying working power to the control processing module, the control processing module is in communication connection with the communication module, and an output end of the passive contact output module is connected with a control system of the belt conveyor. The passive contact output interface is provided, and the passive contact output interface can be linked with a control system of the belt conveyor to ensure the safe operation of the belt conveyor.
In this embodiment, the position communication unit further includes a display module i, and an input end of the display module is connected to an output end of the central processing module;
the early warning emergency stop unit further comprises a display module II, and the input end of the display module is connected with the output end of the control processing module. The display module is used for displaying: the system comprises a power supply state, a superior communication module communication state, a subordinate communication module communication state and a detected conveying belt deviation state.
The displays are all conventional displays, such as liquid crystal displays, and are not described herein again; the display is arranged to improve the information interactivity of the invention, display the current information in real time and facilitate the working personnel to know the actual situation of each device.
Correspondingly, the invention also provides a deviation early warning emergency stop method for the conveying belt of the belt conveyor, which is characterized in that: the device is suitable for the deviation early warning emergency stop device of the conveying belt of the belt conveyor in any one of claims 1 to 6, and comprises: an address automatic allocation stage and a deviation early warning emergency stop stage;
the address automatic allocation section includes:
after the early warning emergency stop unit is powered on, starting from a position communication unit closest to the head of the belt conveyor, setting distribution addresses for the position communication units of the device in sequence along the direction from the head to the tail of the belt conveyor until the last position communication unit receives address distribution information; for example, the early warning emergency stop unit is powered on, information is sent to the 1 st position communication unit along the conveying belt from the machine head to the machine tail, the address 1 is informed of being allocated to the position communication unit, the position communication unit sends information to the next position communication unit, the address 2 is informed of being allocated to the position communication unit, and the like, until the last position communication unit along the conveying belt receives the address allocation information. And the last position communication unit knows that the position communication unit works in a communication terminal mode through dialing in advance, so that the position communication unit sends information to the preceding stage of the position communication unit to inform that address allocation is finished, and the information is uploaded to the early warning emergency stop unit step by step. The dial setting module is used for setting the working mode of the position communication unit, and can be set into 2 working modes, which are respectively: and in the normal mode and the communication terminal mode, the last position communication unit along the conveying belt from the machine head to the machine tail is set to work in the communication terminal mode through dialing, and the condition that no subsequent position communication unit exists is shown. After receiving the address allocation information, the last position communication unit sends a message step by step along the direction from the tail of the belt conveyor to the head of the belt conveyor until the message is transmitted to the early warning emergency stop unit;
when communication abnormity occurs at a certain level in the address allocation process, the position communication unit at the position with abnormal communication transmits the abnormal information to the early warning emergency stop unit, the abnormal information is displayed by a display module of the early warning emergency stop unit, and audible and visual alarm is given to remind an operator of handling the communication abnormity;
the deviation scram stage comprises the following steps:
when the conveying belt deviates and shields the ultrasonic transmission path of the correlation type ultrasonic proximity switch of the sub-detection module I or the sub-detection module II, the corresponding sub-detection module sends the deviation information of the conveying belt to the position communication unit corresponding to the sub-detection module;
when receiving the deviation information of the conveying belt, the position communication unit transmits the deviation and the position information of the conveying belt to the early warning emergency stop unit step by step;
when the early warning emergency stop unit receives the conveying belt deviation information transmitted by the position communication unit, judging whether the conveying belt deviation is slight deviation, if so, generating acousto-optic alarm information to remind an operator to pay attention, and if not, generating acousto-optic alarm information and outputting a passive contact alarm signal;
and in the deviation emergency stop stage, if communication abnormity occurs at a certain stage in the communication process, the communication abnormity position information is transmitted to the early warning emergency stop unit, the display module of the early warning emergency stop unit displays the communication abnormity, and audible and visual alarm is given to remind an operator to process the communication abnormity.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a belt conveyor conveyer belt off tracking early warning scram device which characterized in that: the method comprises the following steps: the device comprises a deviation detection unit, a position communication unit and an early warning emergency stop unit, wherein the deviation detection unit is used for detecting whether a conveying belt of a target belt conveyor deviates or not, the position communication unit is used for receiving a detection result of the deviation detection unit and performing communication, the early warning emergency stop unit is used for receiving information transmitted by the position communication unit and performing corresponding processing according to the information, the device is provided with a plurality of deviation detection units and position communication units according to a preset distance in the length direction of the conveying belt, and the deviation detection units correspond to the position communication units one by one;
the deviation detection unit comprises a sub-detection module I and a sub-detection module II which are arranged along the width direction of the conveying belt in a facing mode, the detection module I and the sub-detection module II respectively comprise a correlation type ultrasonic proximity switch and a mounting bracket for supporting the correlation type ultrasonic proximity switch, a gap is formed between an ultrasonic transmission path of the correlation type ultrasonic proximity switch and the edge of the conveying belt, and ultrasonic waves of the correlation type ultrasonic proximity switch are perpendicular to the plane of the belt surface of the conveying belt;
and the output ends of the sub-detection module I and the sub-detection module II are connected with the position communication unit.
2. The off-tracking early-warning emergency stop device for the conveying belt of the belt conveyor according to claim 1, characterized in that: the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module I and the edge of the conveying belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module II and the edge of the conveying belt;
the sub-detection module I is used for detecting slight deviation, and the sub-detection module II is used for detecting severe deviation;
or the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module II and the edge of the conveyor belt is smaller than the distance between the ultrasonic transmission path of the correlation ultrasonic proximity switch of the sub-detection module I and the edge of the conveyor belt.
The sub-detection module II is used for detecting slight deviation, and the sub-detection module I is used for detecting severe deviation.
3. The off-tracking early-warning emergency stop device for the conveying belt of the belt conveyor according to claim 1, characterized in that: the early warning emergency stop unit is arranged at the head end of the belt conveyor.
4. The off-tracking early-warning emergency stop device for the conveying belt of the belt conveyor according to claim 1, characterized in that: the position communication unit comprises a power supply module, a dial-up setting module, an upper-level communication module, a lower-level communication module, a signal acquisition module and a central processing module, wherein the signal acquisition module is used for acquiring signals of the correlation type ultrasonic proximity switch and transmitting the signals to the central processing module, the output ends of the signal acquisition module and the dial-up setting module are connected with the central processing module, the upper-level communication module and the lower-level communication module are in communication connection with the central processing module, the power supply module is used for providing working power for the central processing module, and the signal output ends of the sub-detection module I and the sub-detection module II are connected with the input end of the signal acquisition module.
5. The off-tracking early-warning emergency stop device for the conveying belt of the belt conveyor according to claim 1, characterized in that: the early warning emergency stop unit comprises an audible and visual alarm module, a communication module, a passive contact output module and a control processing module, wherein the input end of the audible and visual alarm module and the input end of the passive contact output module are connected with the output end of the control module, the power supply module is used for supplying working power to the control processing module, the control processing module is in communication connection with the communication module, and the output end of the passive contact output module is connected with a control system of the belt conveyor.
6. The off-tracking early-warning emergency stop device for the conveying belt of the belt conveyor according to any one of claims 4 or 5, characterized in that:
the position communication unit also comprises a display module I, and the input end of the display module is connected with the output end of the central processing module;
the early warning emergency stop unit further comprises a display module II, and the input end of the display module is connected with the output end of the control processing module.
7. A method for early warning and sudden stop of a conveying belt of a belt conveyor is characterized by comprising the following steps: the device is suitable for the deviation early warning emergency stop device of the conveying belt of the belt conveyor in any one of claims 1 to 6, and comprises: an address automatic allocation stage and a deviation early warning emergency stop stage;
the address automatic allocation section includes:
after the early warning emergency stop unit is powered on, starting from a position communication unit closest to the head of the belt conveyor, setting distribution addresses for the position communication units of the device in sequence along the direction from the head to the tail of the belt conveyor until the last position communication unit receives address distribution information;
after receiving the address allocation information, the last position communication unit sends a message step by step along the direction from the tail of the belt conveyor to the head of the belt conveyor until the message is transmitted to the early warning emergency stop unit;
when communication abnormity occurs at a certain level in the address allocation process, the position communication unit at the position with abnormal communication transmits the abnormal information to the early warning emergency stop unit, the abnormal information is displayed by a display module of the early warning emergency stop unit, and audible and visual alarm is given to remind an operator of handling the communication abnormity;
the deviation scram stage comprises the following steps:
when the conveying belt deviates and shields the ultrasonic transmission path of the correlation type ultrasonic proximity switch of the sub-detection module I or the sub-detection module II, the corresponding sub-detection module sends the deviation information of the conveying belt to the position communication unit corresponding to the sub-detection module;
when receiving the deviation information of the conveying belt, the position communication unit transmits the deviation and the position information of the conveying belt to the early warning emergency stop unit step by step;
when the early warning emergency stop unit receives the conveying belt deviation information transmitted by the position communication unit, judging whether the conveying belt deviation is slight deviation, if so, generating acousto-optic alarm information to remind an operator to pay attention, and if not, generating acousto-optic alarm information and outputting a passive contact alarm signal;
and in the deviation emergency stop stage, if communication abnormity occurs at a certain stage in the communication process, the communication abnormity position information is transmitted to the early warning emergency stop unit, the display module of the early warning emergency stop unit displays the communication abnormity, and audible and visual alarm is given to remind an operator to process the communication abnormity.
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