CN216996326U - Mining coal flow detection and safety protection device - Google Patents
Mining coal flow detection and safety protection device Download PDFInfo
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- CN216996326U CN216996326U CN202220543098.5U CN202220543098U CN216996326U CN 216996326 U CN216996326 U CN 216996326U CN 202220543098 U CN202220543098 U CN 202220543098U CN 216996326 U CN216996326 U CN 216996326U
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Abstract
The utility model relates to the field of control devices for conveying devices, in particular to a coal flow detection and safety protection device for a mining belt conveyor. The coal flow detection device comprises a coal flow detection device, a multiple protection device, a tearing protection device, an anti-skid protection device and a controller; the coal flow detection device comprises a first line laser binocular stereo camera and a first vision processor, wherein the first vision processor is in communication connection with a controller; the multiple protection device comprises a second line laser binocular stereo camera and a second vision processor, and the second vision processor is in communication connection with the controller; the tearing protection device comprises a third line laser binocular stereo camera and a third vision processor, and the third vision processor is in communication connection with the controller; and the speed sensor of the antiskid protection device is in communication connection with the first vision processor or the controller. The utility model provides a mining coal flow detection and safety protection device which can be controlled automatically in real time and integrates various detection indexes.
Description
Technical Field
The utility model relates to the field of control devices for conveying devices, in particular to a coal flow detection and safety protection device for a mining belt conveyor.
Background
In the coal production process, the phenomena of 'big horse pulling trolley' of a main motor, no-load operation, half-load operation, adoption of a reverse coal flow start mode when a transportation system is started and the like mostly exist in the transportation of a conveyor belt caused by production reasons, so that the energy waste phenomenon is caused; many belt conveyor explosion-proof frequency converters are only used as soft start and cannot be adjusted in real time according to load changes, and the speed regulation and energy saving functions of the belt conveyor explosion-proof frequency converters are not fully utilized. The electric energy is greatly wasted, and the reactive loss of equipment is increased; most of the prior conveyer scales and speed regulating systems adopt devices such as a weighing sensor and the like arranged at the tail of a belt conveyor, have huge control errors, can not accurately feed back the weight of coal flow, have unstable speed regulation and can not achieve ideal energy-saving effect;
the existing belt conveyor safety facilities are not protected by foreign matters and large pieces of waste rocks, and accidents are easy to occur due to the fact that people mainly recognize the foreign matters and the large pieces of waste rocks.
The existing speed protection is mostly of an inductive type or a roller type, an inductive speed sensor is arranged on the side surface of a driven roller and is correspondingly attached to a rotating magnet on the side surface of the roller, and a roller type is arranged on the upper surface of a lower-layer conveyor belt and is required to be connected with a special control system to realize the protection function.
The existing coal piling protection mainly comprises an electrode type or swing rod type coal piling sensor which is arranged at a coal bunker wound or a lap joint of two belt conveyors and connected with a special control system, so that the phenomenon of low sensitivity exists.
The existing belt conveyor safety facility has no body position deviation or skew protection, only has conveyor belt deviation protection, and the spring probe rods are installed on two sides of the conveyor belt, so that the probe rods are driven to deviate when the conveyor belt deviates, a limit switch acts, and a protection function is realized.
The existing device for detecting the tearing of the conveying conveyor belt mainly comprises a contact type device and a non-contact type device, wherein the specific modes comprise bar type detection, chord line type, ultrasonic wave, X-ray flaw detection and the like, the contact type detection device generally needs to pull a limit switch to act to trigger alarm so as to realize the detection of the torn part of the conveying conveyor belt, and the mode easily causes the damage of the limit switch due to the influence of the field environment, causes the damage of deformation and the like of a detection element and influences the normal detection function, so that the detection is not timely and accurate, seriously influences the normal production and even causes great loss; the non-contact detection device is easily disturbed by the field environment, and has the technical problems of complex detection and poor use flexibility.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a mining coal flow detection and multiple protection device which can be controlled in real time and automatically and integrates various detection indexes aiming at the defects in the prior art.
The technical scheme for solving the technical problems is as follows:
a mining coal flow detection and safety protection device is used for a belt conveyor and is characterized by comprising a coal flow detection device, a multiple protection device, a tearing protection device, an anti-skidding protection device and a controller, wherein the output end of the controller is connected to the belt conveyor through a frequency converter; wherein,
the coal flow detection device is arranged above the conveyor belt and comprises a first line laser binocular stereo camera and a first vision processor, wherein the first line laser binocular stereo camera is arranged by a camera towards the conveyor belt, the first vision processor is electrically connected with the first line laser binocular stereo camera and used for analyzing the coal flow, and the first vision processor is in communication connection with the controller;
the multiple protection device is arranged above the conveyor belt and comprises a second line laser binocular stereo camera and a second vision processor, wherein the camera is arranged towards the conveyor belt, the second vision processor is electrically connected with the second line laser binocular stereo camera, and the second vision processor is in communication connection with the controller;
the tearing protection device is arranged at the other side of the conveyor belt opposite to the coal conveying surface and comprises a third line laser binocular stereo camera with a camera arranged towards the conveyor belt and a third vision processor electrically connected with the third line laser binocular stereo camera, and the third vision processor is in communication connection with the controller;
the anti-skid protection device comprises a speed sensor, and the speed sensor is in communication connection with the first vision processor or the controller.
Preferably, the controller comprises a PLC, a switch, a human-computer interaction interface, an intermediate relay and a power switch.
Preferably, the frequency converter is provided with five gears.
Preferably, the speed sensor is a rotary encoder.
Preferably, the coal flow detection device, the multiple protection device, the tearing protection device and the anti-skid protection device are integrated in a box body with a detection window.
Preferably, an alarm device is connected to the controller.
The utility model has the beneficial effects that:
the coal flow detection device, the multiple protection device, the tearing protection device and the anti-skid protection device are arranged, so that the comprehensive and automatic monitoring of the working state of the belt conveyor is realized, and the instant alarm and shutdown protection can be realized when abnormal conditions occur.
The utility model utilizes the line laser binocular stereo camera to obtain real-time images, the controller controls the belt conveyor according to the analysis and processing result of the images, and the control process is real-time and accurate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram illustrating the structure of one embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection of a speed sensor with a controller and a coal flow sensing device according to another embodiment of the present invention;
in the figure: 1. the coal conveying system comprises an upper layer conveyor belt, 10 coal conveying surfaces, 2 lower layer conveyor belts, 3 coal flow detection devices, 4 multiple protection devices, 5 tearing protection devices, 6 controllers, 60 human-computer interaction interfaces and 7 speed sensors.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.
As shown in fig. 1, fig. 2 and fig. 3, the mining coal flow detection and safety protection device of the present embodiment is used for a belt conveyor, and is characterized by comprising a coal flow detection device 3, a multiple protection device 4, a tearing protection device 5, an anti-skid protection device and a controller 6, wherein an output end of the controller 6 is connected to the belt conveyor through a frequency converter; preferably, the coal flow detection device 3, the multiple protection device 4, the tearing protection device 5 and the anti-skid protection device are integrated in a box body with a detection window, and a gigabit network port and an RS-485 interface are further arranged in the box body.
The coal flow detection device 3 is arranged above the conveyor belt and comprises a first line laser binocular stereo camera with a camera arranged towards the conveyor belt and a first vision processor which is electrically connected with the first line laser binocular stereo camera and used for analyzing the coal flow, and the first vision processor is in communication connection with the controller 6; the coal flow detection device 3 acquires an image of coal on the belt conveyor through a first line laser binocular stereo camera, the first vision processor calculates the cross section area of the coal and calculates the coal flow by combining the transmission speed;
the multiple protection device 4 is arranged above the conveyor belt and comprises a second line laser binocular stereo camera and a second vision processor, wherein the camera is arranged towards the conveyor belt, the second vision processor is electrically connected with the second line laser binocular stereo camera, a height threshold value, a volume threshold value, a length threshold value, a sharpness threshold value, a whole machine offset threshold value, a whole machine inclination angle threshold value and a conveyor belt offset threshold value are preset in the second vision processor, and the second vision processor is in communication connection with the controller 6;
the tearing protection device 5 is arranged on the other side, opposite to the coal conveying surface 10, of the conveyor belt, as shown in fig. 1, the conveyor belt comprises an upper layer conveyor belt 1 and a lower layer conveyor belt 2, the upper layer conveyor belt 1 and the lower layer conveyor belt are connected end to form an annular shape, and the surface on the periphery side of the annular shape is the coal conveying surface 10. The three-dimensional visual system comprises a third-line laser binocular stereo camera and a third visual processor, wherein the camera is arranged towards a conveying belt, the third-line laser binocular stereo camera is electrically connected with the third-line laser binocular stereo camera, a transverse crack threshold value and a longitudinal crack threshold value are preset in the third visual processor, and the third visual processor is in communication connection with a controller 6;
the antiskid protection device comprises a speed sensor 7, wherein the speed sensor 7 is in communication connection with a first vision processor as shown in figure 2, or the speed sensor 7 is in communication connection with a controller 6 as shown in figure 3.
Preferably, the controller 6 comprises a PLC, a switch, a man-machine interface 60, an intermediate relay and a power switch. Preferably, an alarm device is further connected to the controller 6. In this embodiment, the PLC employs S7-200 SMART.
The line laser binocular stereo camera utilizes line laser auxiliary positioning, acquires object three-dimensional space coordinates through a binocular stereo vision system, can carry out high-precision three-dimensional point cloud model reconstruction on an object outline, compares the object outline with a standardized three-dimensional model, can be applied to various functions such as positioning, defect detection, size measurement and the like, can detect the object with high precision, which is not obvious in irregularity and characteristic information, and has terminal intelligence and modularization. Therefore, real-time coal flow volume values are calculated through intelligent detection, basic data such as body inclination deviation, driving belt deviation, coal piling, foreign matters, large gangue and longitudinal tearing are calculated through detection, and various functions of the system are achieved through scientific means such as AI intelligent analysis and big data statistics.
The PLC serves as a client, a switch is utilized to communicate a coal flow detection device 3, a multiple protection device 4, a longitudinal tearing protection terminal and an HMI (human machine interface) 60 of a server end through a Modbus TCP (transmission control protocol), on one hand, data of the coal flow detection terminal, the safety protection terminal and the tearing protection device 5 are read, and alarm output and shutdown output are conducted outside through an intermediate relay; and the PLC digital output terminal is communicated with the frequency converter to realize multi-stage speed control. On one hand, the coal flow data and all protection data of the HMI (human machine interface) 60 are written in to complete the functions of real-time digital display and dynamic picture display, and can be converted into weight values to display instantaneous data and accumulated data, and the inquiry is accumulated according to days, months and years.
Preferably, the frequency converter is provided with five gears which respectively correspond to five speeds of 0%, 25%, 50%, 75% and 100%, and the frequency conversion speed regulation control of the conveyor belt is carried out according to different levels of coal quantity, so that the functions of 'how fast the coal rotates and less slow the coal rotates' of the belt conveyor are met, and the purpose of energy conservation is realized.
Preferably, the speed sensor 7 is a rotary encoder. The rotary encoder is a speed displacement sensor integrated with optical mechanical and electrical technology. The speed sensor 7 can be arranged on the upper surface of a lower-layer transmission belt of the belt conveyor and is connected and communicated with the coal flow detection device 3, the running speed of the transmission belt conveyor is calculated, basic data are provided for the coal flow detection device 3, and speed protection basic data are provided for the controller 6;
specifically, the utility model can analyze and process the following conditions in real time when in use:
a. the friction and the slip are generated between the driving roller and the conveyor belt, and the alarm device of the utility model gives an alarm and delays 5s for shutdown protection.
The PLC converts the speed value of the rotary encoder into a speed value of the conveyor belt, compares the speed value of the conveyor belt with a given speed value of the frequency converter, and when the speed value of the conveyor belt is inconsistent with the given speed value, the actual running overspeed or stalling of the conveyor belt is indicated, so that the alarm and shutdown protection functions are realized;
b. when the coal accumulation height exceeds the height threshold value set by the utility model, the alarm device gives an alarm and controls the belt conveyor to stop;
when the length of long objects such as reinforcing steel bars, anchor rods, ironware and the like on the conveyor belt exceeds a length threshold value, the sharpness of the sharp objects exceeds a sharpness threshold value, and the volume of large pieces of gangue exceeds a volume threshold value, the utility model alarms and controls the stop of the belt conveyor;
and the second line laser binocular stereo camera acquires a three-dimensional image of an object on the conveyor belt, the second vision processor receives the three-dimensional image, analyzes and calculates the height of the coal pile, identifies the object which is not coal, calculates the length, the volume and the sharpness of the object, compares the calculation result with a preset threshold value, and gives an alarm and stops the machine if the calculation result exceeds the threshold value.
c. The belt conveyor body deviates or inclines towards any one direction from left to right, the conveying belt deviates towards any one direction from left to right, when the deviation exceeds a threshold value, the alarm device gives an alarm, and the controller 6 controls the belt conveyor to delay for 5s and stop;
the second line laser binocular stereo camera obtains a three-dimensional image of an object on the conveyor belt and also obtains an image of the belt conveyor including the conveyor belt, the second vision processor receives the image, analyzes and calculates the offset and the gradient of the belt conveyor and the offset of the conveyor belt, compares the calculation result with a preset complete machine offset threshold, a complete machine inclination angle threshold and a conveyor belt offset threshold respectively, and gives an alarm and stops the machine if the calculation result exceeds the threshold.
d. When the trace with longitudinal crack or transverse crack is conveyed, the transverse crack reaches a certain length, the longitudinal crack occurs, the alarm device gives an alarm, and the controller 6 controls the belt conveyor to stop;
and the third line laser binocular stereo camera acquires an image of the conveyor belt, the third vision processor receives the image and calculates the image, the calculated result is compared with a transverse crack threshold value and a longitudinal crack threshold value, and if the calculated result is greater than a preset threshold value, alarming and shutdown protection are carried out.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (6)
1. A mining coal flow detection and safety protection device is used for a belt conveyor and is characterized by comprising a coal flow detection device (3), a multiple protection device (4), a tearing protection device (5), an anti-skidding protection device and a controller (6), wherein the output end of the controller (6) is connected to the belt conveyor through a frequency converter; wherein,
the coal flow detection device (3) is arranged above the conveyor belt and comprises a first line laser binocular stereo camera and a first vision processor, wherein the first line laser binocular stereo camera is arranged towards the conveyor belt through a camera, the first vision processor is electrically connected with the first line laser binocular stereo camera and used for analyzing the coal flow, and the first vision processor is in communication connection with the controller (6);
the multiple protection device (4) is arranged above the conveyor belt and comprises a second line laser binocular stereo camera and a second vision processor, wherein the camera is arranged towards the conveyor belt, the second line laser binocular stereo camera is electrically connected with the second line laser binocular stereo camera, and the second vision processor is in communication connection with the controller (6);
the tearing protection device (5) is arranged at the other side of the conveyor belt opposite to the coal conveying surface (10) and comprises a third line laser binocular stereo camera and a third vision processor, wherein the camera is arranged towards the conveyor belt, the third line laser binocular stereo camera is electrically connected with the third line laser binocular stereo camera, and the third vision processor is in communication connection with the controller (6);
the antiskid protection device comprises a speed sensor (7), wherein the speed sensor (7) is in communication connection with the first vision processor or the controller (6).
2. The mining coal flow detection and safety protection device according to claim 1, wherein the controller (6) comprises a PLC, a switch, a human-computer interaction interface (60), an intermediate relay and a power switch.
3. The mining coal flow detection and safety protection device according to claim 1, wherein the frequency converter is provided with five gears.
4. The mining coal flow detection and safety protection device according to claim 1, characterized in that the speed sensor (7) is a rotary encoder.
5. The mining coal flow detection and safety protection device according to claim 1, characterized in that the coal flow detection device (3), the multiple protection device (4), the tearing protection device (5) and the anti-skid protection device are integrated in a box body with a detection window.
6. The mining coal flow detection and safety protection device according to claim 1, characterized in that the controller (6) is connected with an alarm device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220543098.5U CN216996326U (en) | 2022-03-14 | 2022-03-14 | Mining coal flow detection and safety protection device |
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| CN202220543098.5U CN216996326U (en) | 2022-03-14 | 2022-03-14 | Mining coal flow detection and safety protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118189829A (en) * | 2024-05-08 | 2024-06-14 | 常州市佐安电器有限公司 | Laser triangulation method coal flow measurement device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118189829A (en) * | 2024-05-08 | 2024-06-14 | 常州市佐安电器有限公司 | Laser triangulation method coal flow measurement device and method |
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