Overload prevention early warning device for scraper conveyer of fully mechanized coal mining face
By integrating current transformers and TK200 panels into the scraper conveyor of the fully mechanized mining face, automated overload warning was achieved, solving the problems of low efficiency and high risk caused by manual communication in the existing technology, and improving the safety of the working face and the life of the equipment.
Patent Information
- Application Number
- CN202520554915.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-27
AI Technical Summary
Existing overload warning devices require manual communication to notify operators when the warning current is reached, which consumes a lot of energy, resulting in low work efficiency, high risk, and a high incidence of overload accidents.
Design an overload warning device for a scraper conveyor in a fully mechanized mining face. The device monitors the current in real time through a current transformer and converts it into a frequency signal. The overload warning value is set using a TK200 panel, and a voice alarm prompts the coal machine driver to slow down to avoid overload power tripping. The device includes a combination of a motor, conveyor components, cables, a current transformer, a converter body, a TK200 panel, and a microphone.
It has achieved automated overload warning, reduced manual intervention, improved work efficiency, reduced the incidence of overload power outages and vehicle congestion accidents, and extended the service life of the transport aircraft.
Smart Images
Figure CN223822686U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mining technology, and in particular to an overload warning device for scraper conveyors in fully mechanized mining faces. Background Technology
[0002] The longwall mining face has many faults and thick coal seams. Most of the time, the working face is under the influence of gangue. When the coal cutter cuts into the coal and gangue in the area with many gangue or within the range of fault influence, the conveyor is under heavy load due to the large amount of gangue. This can easily cause the conveyor to overload and trip, or even cause a car crash. Therefore, it is necessary to use an early warning device to issue an overload warning.
[0003] Currently, when the overload warning device reaches the warning current, most of the time it is manually communicated to the face operator to control the amount of coal. This control process requires the operator to keep a close eye on the screen at all times, which takes up a lot of energy, resulting in low work efficiency, high operational risks, and may lead to untimely warnings, and the overload shutdown rate is still relatively high.
[0004] Therefore, in view of the fact that the existing overload warning devices are not timely and the overload accident rate is high, an overload warning device for the scraper conveyor of the fully mechanized mining face can be designed. Through combined detection and voice alarm, the overload power trip of the working face can be reduced, the coal machine speed can be optimized, the occurrence of car jam accidents can be eliminated, the service life of the conveyor can be extended, and the coal production can be effectively increased, thereby enhancing the practical value of the device. Utility Model Content
[0005] To overcome the problem that most overload warning devices rely on manual communication to inform the face operator to control the coal quantity when the warning current is reached, which requires the operator to keep a close eye on the screen, consumes a lot of energy, has low work efficiency, and poses a high risk of operation, this utility model is proposed.
[0006] The technical solution of this utility model is as follows: an overload warning device for a scraper conveyor in a fully mechanized mining face, comprising a conveyor working face, a motor, a conveyor assembly, a cable, a current transformer, a converter body, a TK200 panel, a power supply assembly, and a microphone. A motor is installed on one side of the conveyor working face, a conveyor assembly is installed on the inner side of the conveyor working face, a cable is installed on one side of the motor, a current transformer is installed on the outer side of the cable, a converter body is installed on one side of the conveyor working face, a TK200 panel is installed on the outer side of the conveyor working face, a power supply assembly is installed on one side of the TK200 panel, and a microphone is installed on the outer side of the conveyor working face.
[0007] Preferably, by setting a fixed position for the transport component on the working face of the conveyor, a motor drives the transport component to operate, and the transport component performs material conveying operations. Current is supplied to the motor via a cable, and a current transformer monitors the current in the cable in real time, converting the large current signal in the cable into a small current signal. The current transformer then sends the converted small current signal to the converter body, which converts the small current signal into a frequency signal and sends the converted frequency signal to the TK200 panel. Simultaneously, a power supply component provides power to the current transformer and the TK200 panel. An overload warning value of 220A is set in the TK200 panel. When the motor current reaches the warning value, the TK200 panel sends a start command to the microphone, causing the microphone to emit an alarm sound. Upon hearing the alarm, the coal machine operator controls the coal machine to slow down. After the microphone stops emitting an alarm for 5-10 seconds, the coal machine resumes normal speed. This reduces the occurrence of overload tripping at the working face, optimizes the coal machine speed, prevents accidents caused by vehicle jamming, extends the service life of the conveyor, and enhances the practical value of the device.
[0008] Preferably, the motor and cable are electrically connected to each other, the current transformer and the converter body are electrically connected to each other, and the converter body is electrically connected to the TK200 panel. The converter body is a VI / F converter.
[0009] Preferably, the current transformer is located on one side of the working surface of the conveyor, and the current transformer is electrically connected to the cable. The current transformer is a KXKA8 current sensor, and the microphone is electrically connected to the TK200 panel.
[0010] Preferably, the transport assembly includes a drive roller and a transport belt, with the drive roller located on the inner side of the transport machine's working surface and the transport belt located on the outer side of the drive roller.
[0011] Preferably, the drive roller is rotatably connected to the working surface of the conveyor, the output end of the motor is connected to the drive roller, the drive roller is located on the inner side of one end of the conveyor belt, and the conveyor belt is rotatably connected to the working surface of the conveyor.
[0012] Preferably, the power supply components include a power cord and a power module, with the power cord located on one side of the current transformer and the power module located on the inside of the TK200 panel.
[0013] Preferably, the power cord is electrically connected to the current transformer, and the power module is electrically connected to the TK200 panel. The power cord provides 24V power to the current transformer, and the power module provides 12V power to the TK200 panel.
[0014] The beneficial effects of this utility model are:
[0015] When the conveyor is in operation, a fixed motor is used at the working face to control the conveyor's operation for material conveying. Current is supplied to the motor via a cable, and a current transformer monitors the current in the cable in real time, converting a large current signal into a small current signal. The current transformer then sends the converted small current signal to the converter body, which converts the small current signal into a frequency signal and sends it to the TK200 panel. An overload warning value of 220A is set in the TK200 panel. When the motor current reaches the warning value, the TK200 panel sends a start command to the microphone, causing the microphone to sound an alarm. Upon hearing the alarm, the coal mine operator slows down the coal mine. After the microphone stops emitting an alarm for 5-10 seconds, the coal mine resumes normal speed. This design addresses the problem that most overload warning devices rely on manual communication to inform the working face operator to control the coal quantity when the warning current is reached. This control process requires operators to constantly monitor the screen, consuming a lot of energy, resulting in low work efficiency and high operational risks. This design enhances the practical value of the device. Attached Figure Description
[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the anti-overload early warning device for the scraper conveyor in the fully mechanized mining face of this utility model.
[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the transport component of the overload warning device for the scraper conveyor in the fully mechanized mining face according to this utility model.
[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the power supply component of the anti-overload early warning device for the scraper conveyor in the fully mechanized mining face according to this utility model.
[0019] Figure 4 The diagram shown is a schematic diagram of the circuit structure of the overload warning device for the scraper conveyor in the fully mechanized mining face of this utility model.
[0020] Explanation of reference numerals in the attached drawings: 1. Working surface of the conveyor; 2. Motor; 201. Drive roller; 202. Conveyor belt; 3. Cable; 4. Current transformer; 401. Power cord; 5. Converter body; 6. TK200 panel; 601. Power module; 7. Microphone. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Please see Figure 1 and Figure 4This utility model provides an embodiment of an overload warning device for a scraper conveyor in a fully mechanized mining face, comprising a conveyor working face 1, a motor 2, a conveying assembly, a cable 3, a current transformer 4, a converter body 5, a TK200 panel 6, a power supply assembly, and a microphone 7. The motor 2 is located on one side of the conveyor working face 1, and the conveying assembly is located on the inner side of the conveyor working face 1. The cable 3 is located on one side of the motor 2, and the motor 2 and cable 3 are electrically connected. The current transformer 4 is located on the outer side of the cable 3, and is positioned on one side of the conveyor working face 1. The current transformer 4 is connected to... Cables 3 are electrically connected to each other. The current transformer 4 is a KXKA8 current sensor. A converter body 5 is installed on one side of the conveyor working surface 1. The current transformer 4 and the converter body 5 are electrically connected to each other. A TK200 panel 6 is installed on the outside of the conveyor working surface 1. The converter body 5 and the TK200 panel 6 are electrically connected to each other. The converter body 5 is a VI / F converter. A power supply component is installed on one side of the TK200 panel 6. A microphone 7 is installed on the outside of the conveyor working surface 1. The microphone 7 and the TK200 panel 6 are electrically connected to each other.
[0023] Please see Figure 2 In this embodiment, the transport component includes a drive roller 201 and a transport belt 202. The drive roller 201 is arranged on the inner side of the working surface 1 of the transport machine, and the drive roller 201 is rotatably connected to the working surface 1 of the transport machine. The output end of the motor 2 is connected to the drive roller 201. The transport belt 202 is arranged on the outer side of the drive roller 201. The drive roller 201 is arranged on the inner side of one end of the transport belt 202, and the transport belt 202 is rotatably connected to the working surface 1 of the transport machine. The motor 2 drives the drive roller 201 to rotate, and the rotation of the drive roller 201 drives the transport belt 202 to rotate, and the transport belt 202 performs material conveying operations.
[0024] Please see Figure 3 In this embodiment, the power supply component includes a power cord 401 and a power module 601. The power cord 401 is provided on one side of the current transformer 4 and is electrically connected to the current transformer 4. The power module 601 is provided on the inner side of the TK200 panel 6 and is electrically connected to the TK200 panel 6. The power cord 401 provides 24V power to the current transformer 4, and the power module 601 provides 12V power to the TK200 panel 6, ensuring the normal operation of the current transformer 4 and the TK200 panel 6.
[0025] When the coal mining machine is running, current is transmitted to the motor 2 through the cable 3. The motor 2 drives the drive roller 201 to rotate, and the rotation of the drive roller 201 drives the conveyor belt 202 to rotate, and the material is conveyed through the conveyor belt 202.
[0026] Meanwhile, the current transformer 4 is supplied with 24V power through the power line 401. The current transformer 4 monitors the current in the cable 3 in real time and converts the large current signal in the cable 3 into a small current signal. The current transformer 4 transmits the converted small current signal to the converter body 5. The converter body 5 converts the small current signal into a frequency signal and transmits the converted frequency signal to the TK200 panel 6.
[0027] In case of overload protection, the power supply module 601 provides 12V power to the TK200 panel 6. The overload warning value of 220A is set in the TK200 panel 6. When the current of motor 2 reaches the warning value, the TK200 panel 6 sends a start command to the microphone 7. At this time, the microphone 7 emits an alarm sound. After hearing the alarm, the coal machine operator controls the coal machine to slow down. After the microphone 7 stops emitting alarms for 5-10 seconds, the coal machine resumes normal speed.
[0028] Through the above steps, by setting the fixed position of the transport component on the working face 1 of the conveyor, the motor 2 drives the transport component to operate, and the transport component performs material conveying operations. Current is transmitted to the motor 2 via the cable 3. The current in the cable 3 is monitored in real time by the current transformer 4, and the large current signal in the cable 3 is converted into a small current signal. The current transformer 4 sends the converted small current signal to the converter body 5, which converts the small current signal into a frequency signal. The converter body 5 sends the converted frequency signal to the TK200 panel 6. An overload warning value of 220A is set in the TK200 panel 6. When the current of the motor 2 reaches the warning value, the TK200 panel 6 sends a start command to the microphone 7, causing the microphone 7 to emit an alarm sound. After hearing the alarm, the coal machine operator controls the coal machine to slow down. After the microphone 7 stops emitting alarms for 5-10 seconds, the coal machine resumes normal speed, thereby reducing the occurrence of overload tripping at the working face, optimizing the coal machine speed, preventing the occurrence of crush accidents, and extending the service life of the conveyor.
[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. An overload warning device for a scraper conveyor in a fully mechanized mining face, comprising a conveyor working face (1), a motor (2), a conveyor assembly, and a cable (3), characterized in that: It also includes a current transformer (4), a converter body (5), a TK200 panel (6), a power supply component and a microphone (7). A motor (2) is provided on one side of the transport machine working surface (1), a transport component is provided on the inside of the transport machine working surface (1), a cable (3) is provided on one side of the motor (2), a current transformer (4) is provided on the outside of the cable (3), a converter body (5) is provided on one side of the transport machine working surface (1), a TK200 panel (6) is provided on the outside of the transport machine working surface (1), a power supply component is provided on one side of the TK200 panel (6), and a microphone (7) is provided on the outside of the transport machine working surface (1).
2. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 1, characterized in that: The motor (2) and the cable (3) are electrically connected to each other, the current transformer (4) and the converter body (5) are electrically connected to each other, and the converter body (5) and the TK200 panel (6) are electrically connected to each other.
3. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 1, characterized in that: The current transformer (4) is located on one side of the working surface (1) of the conveyor. The current transformer (4) is electrically connected to the cable (3), and the microphone (7) is electrically connected to the TK200 panel (6).
4. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 1, characterized in that: The transport assembly includes a drive roller (201) and a transport belt (202). The drive roller (201) is provided on the inner side of the working surface (1) of the transport machine, and the transport belt (202) is provided on the outer side of the drive roller (201).
5. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 4, characterized in that: The drive roller (201) is rotatably connected to the working surface (1) of the conveyor. The output end of the motor (2) is connected to the drive roller (201). The drive roller (201) is located on the inner side of one end of the conveyor belt (202). The conveyor belt (202) is rotatably connected to the working surface (1) of the conveyor.
6. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 1, characterized in that: The power supply components include a power cord (401) and a power module (601). The power cord (401) is provided on one side of the current transformer (4), and the power module (601) is provided on the inside of the TK200 panel (6).
7. The overload warning device for the scraper conveyor in a fully mechanized mining face according to claim 6, characterized in that: The power cord (401) is electrically connected to the current transformer (4), and the power module (601) is electrically connected to the TK200 panel (6).