Automatic material distribution method for coal tower

Abstract

The invention belongs to the field of automatic distribution of coking coal towers, and relates to an automatic distribution method of a coal tower. The top of each coal tower is provided with a rotary material distributing machine at present, and the rotary material distributing machine walks clockwise (anticlockwise) around a rotary center supporting device and distributes materials for three bins at the same time. Each rotary distributing machine is provided with six single-point radar level meters and six travel switches, after height measurement is conducted on materials in a bin through the radar level meters, fixed-point automatic distributing is conducted by means of Gray bus positioning and travel planning of the rotary distributing machines through the travel switches, and unmanned operation is achieved.

Description

Technical Field

[0001] The invention belongs to the field of automatic material distribution of coking coal towers and relates to an automatic material distribution method of coal towers. Background Art

[0002] The material distribution work of the rotary material distribution machine of the existing coal tower of the coking plant is completed by manual operation on the PLC cabinet next to the material distribution machine. Due to the harsh on-site environment, the failure rate of the rotary material distribution machine is high, and the existing radar level meter and travel switch fail, and the manual labor intensity is high. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a method for automatic feeding of coal towers, which measures the height of materials in the bin by a radar level meter, and then uses Gray busbar positioning and travel switches to plan the travel of a rotary feeding machine for fixed-point automatic feeding, thereby realizing unmanned operation.

[0004] To achieve the above object, the present invention provides the following technical solutions: a method for automatically distributing coal in a coal tower, applicable to an automatic distributing device for a coal tower, the device comprising an encoder, a steel support, a longitudinal trolley and a transverse trolley running mechanism, a safety device, a hydraulic system, and an electrical control system, the method comprising the following steps:

[0005] S1, Gray busbar positioning: The Gray busbar is installed above the concrete placing machine in a 360° circular arrangement to facilitate the concrete placing machine to rotate and position the material accurately;

[0006] S2, 6 radar level meters are installed in each coal tower;

[0007] S3, redundant limit protection proximity switch; 6 proximity switches are arranged at key positions in each coal tower. The coal tower has 6 unloading points. Travel switches are installed at the unloading points. The travel switches are triggered at the points to verify the encoder of the material placing machine and provide limit protection for it;

[0008] S4, anti-blocking device; a travel switch is arranged at a key position in each coal tower, using a high-protection-level travel switch with a ball rocker and a 360° anti-blocking visual identification device installed on the coal tower.

[0009] Optionally, the electrical control system includes machine-side mode, remote manual mode, remote automatic mode, trolley position control mode, automatic logic and interlocking control.

[0010] Optional, machine-side mode is to switch from the on-site operation box to local control, which is pure circuit control and can "start / stop" the belt and trolley separately. The circuit is a start-protection-stop circuit. Local circuit protection: 1) Thermal relay protection of the belt and trolley; 2) When the belt is blocked, only the belt is stopped.

[0011] Optional, remote manual mode is to switch from the on-site operation box to remote, and select manual on the screen to enter manual mode. Manual mode: You can remotely control the belt "forward / reverse / start / stop", and the trolley inputs the manual position on the screen to "start / stop" the moving trolley.

[0012] Optional, remote automatic mode is to call the remote control from the on-site operation box, and select automatic on the screen to enter the automatic mode; in the automatic mode, press "Auto Start / Auto Stop" on the screen to start and stop the automatic mode;

[0013] Special logic: After automatic start, the screen can be switched to manual mode. At this time, the belt keeps its original state and the trolley stops moving, which is convenient for manual intervention in warehouse shifting without stopping the belt. At the same time, the screen has an automatic prompt for remote failure, prompting the operator to switch back to automatic mode after manual action.

[0014] Optionally, the trolley position control mode includes trolley Gray bus positioning: if the Gray bus does not report a fault, select Gray bus positioning; trolley limit switch positioning: if the Gray bus reports a fault, select limit switch positioning.

[0015] Optionally, the automatic logic includes belt automatic logic: the belt automatically starts and runs forward all the time, and stops in case of failure;

[0016] Automatic logic of large vehicle:

[0017] 1) The trolley cyclically scans from the 1#-6# unloading position to the feeding position. If the current feeding position exceeds the high material level value, it will automatically move to the next feeding position;

[0018] 2) When all five positions are at "high material level" (i.e. the last feedable position is greater than the high material level minus the protection value), the "high material level warning" is triggered, and the "coal distribution / preparation" is stopped in sequence;

[0019] 3) The trolley does not move when the material level is too high at the material drop position, and the material level continues to exceed the "high limit material level" protection shutdown;

[0020] 4) Remote material blockage: When the remote manual / automatic mode triggers the material blockage, the trolley runs in the reverse direction for a certain distance (same as the direction in which the material blockage switch is installed), and as the trolley moves away, the material blockage switch is restored and the trolley is re-triggered, and the trolley moves again. This way, the process is not frequently stopped due to material blockage. When the material blockage occurs, a prompt pops up on the screen, and the operator should promptly move the trolley in the reverse direction to other empty bin positions in the manual mode, and contact personnel to confirm the cleaning / on-site material blockage debris;

[0021] 5) Trolley fault handling: Except for material blockage, which is a separate action, other fault screens will have prompts, but the belt will not stop running, only the trolley will stop running. The operator needs to pay attention to timely handling in this case.

[0022] Optional interlocking control includes 1) belt protection interlocking: when the screen selects belt interlocking, if the conveyor belt stops running, the coal preparation process will be interlocked and stopped; 2) "Coal distribution / coal preparation" stop interlocking: the "high material level" warning will first trigger the shutdown of the coal distribution system, delay the shutdown of the coal preparation system, and then stop the conveyor automatically.

[0023] The beneficial effects of the present invention are as follows: the present invention combines a radar level meter to realize 360° uniform speed and variable speed material distribution through a material distribution system, utilizes Gray busbar positioning and a travel switch to perform fixed-point automatic material distribution after the travel planning of the rotary material distribution machine, and realizes unmanned operation.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 It is a schematic diagram of automatic distribution of coal tower of the present invention. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figure 1 , which is a method for automatically placing coal in a coal tower, and is applicable to an automatic placing device for a coal tower, the device is composed of an encoder, a steel support, a longitudinal trolley and a transverse trolley running mechanism, a safety device, a hydraulic system, and an electrical control system. The method includes the following steps:

[0031] S1, Gray busbar positioning device is installed in a 360° circular arrangement on the coal tower to achieve accurate positioning. Six proximity switches are arranged at key positions in each coal tower to verify the encoder of the material placing machine and provide extreme protection for it;

[0032] S2, anti-blocking equipment is installed at the coal bunker discharge port and a visual system is installed around the coal tower (high-definition camera, half of the coal tower material will pass through the grille plate to the coal bunker, if there is a blockage, it will form a hill shape on the grille plate, and the blockage will be judged in turn) to achieve visual anti-blocking identification;

[0033] S3, the interlocking positioning and limit protection information of the coal tower rotary material distribution electric control system, the anti-blocking device and the four corners of the coal tower rotary material distribution machine layer are each equipped with a video surveillance camera, which is used to remotely conduct visual anti-blocking identification technology of the production environment before the rotary material distribution machine is operated to realize unmanned operation of the coal tower material distribution;

[0034] In this embodiment, a rotary material distributor is currently installed on the top of each coal tower, which moves clockwise (counterclockwise) around the rotary center support device and distributes materials to three bins at the same time. Each rotary material distributor is equipped with 6 single-point radar level meters and 6 travel switches. After the height of the material in the bin is measured by the radar level meter, the Gray busbar positioning and the travel switch are used to plan the travel of the rotary material distributor to carry out fixed-point automatic distribution, realizing unmanned operation;

[0035] In this embodiment, the electrical control system includes a machine-side mode, a remote manual mode, a remote automatic mode, a trolley position control mode, automatic logic and interlocking control.

[0036] In this embodiment, the machine-side mode is switched from the on-site operation box to local control, which is pure circuit control and can "start / stop" the belt and the trolley individually. The circuit is a start-protection-stop circuit with local circuit protection: 1) thermal relay protection of the belt and the trolley; 2) when the belt is blocked, only the belt is stopped.

[0037] In this embodiment, the remote manual mode is to switch the on-site operation box to remote mode, and the screen selects manual mode. Manual mode: The belt can be remotely controlled in "forward / reverse / start / stop", and the trolley inputs the manual position of the screen to "start / stop" the moving trolley.

[0038] In this embodiment, the remote automatic mode is when the on-site operation box is turned on remotely, and the screen selects automatic mode; the automatic mode can be started and stopped by pressing the "auto start / auto stop" on the screen;

[0039] Special logic: After automatic start, the screen can be switched to manual mode. At this time, the belt keeps its original state and the trolley stops moving, which is convenient for manual intervention in warehouse shifting without stopping the belt. At the same time, the screen has an automatic prompt for remote failure, prompting the operator to switch back to automatic mode after manual action.

[0040] In this embodiment, the trolley position control method includes trolley Gray bus positioning: if the Gray bus does not report a fault, select the Gray bus positioning; trolley limit switch positioning: if the Gray bus reports a fault, select the limit switch positioning.

[0041] In this embodiment, the automatic logic includes the belt automatic logic: the belt automatically starts and runs forward all the time, and stops when there is a fault;

[0042] Automatic logic of large vehicle:

[0043] 1) The trolley cyclically scans from the 1#-6# unloading position to the feeding position. If the current feeding position exceeds the high material level value, it will automatically move to the next feeding position;

[0044] 2) When all five positions are at "high material level" (i.e. the last feedable position is greater than the high material level minus the protection value), the "high material level warning" is triggered, and the "coal distribution / preparation" is stopped in sequence;

[0045] 3) The trolley does not move when the material level is too high at the material drop position, and the material level continues to exceed the "high limit material level" protection shutdown;

[0046] 4) Remote material blockage: When the remote manual / automatic mode triggers the material blockage, the trolley runs in the reverse direction for a certain distance (same as the direction in which the material blockage switch is installed), and as the trolley moves away, the material blockage switch is restored and the trolley is re-triggered, and the trolley moves again. This way, the process is not frequently stopped due to material blockage. When the material blockage occurs, a prompt pops up on the screen, and the operator should promptly move the trolley in the reverse direction to other empty bin positions in the manual mode, and contact personnel to confirm the cleaning / on-site material blockage debris;

[0047] 5) Trolley fault handling: Except for material blockage, which is a separate action, other fault screens will have prompts, but the belt will not stop running, only the trolley will stop running. The operator needs to pay attention to timely handling in this case.

[0048] In this embodiment, the interlocking control includes 1) belt protection interlocking: when the belt interlocking is selected on the screen, if the conveyor belt stops running, the coal preparation process will be interlocked and stopped; 2) "coal distribution / coal preparation" stop interlocking: the "high material level" warning will first trigger the shutdown of the coal distribution system, delay the shutdown of the coal preparation system, and then stop the conveyor automatically.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for automatically distributing coal in a coal tower, characterized in that: Applicable to a coal tower automatic feeding device, the device is composed of an encoder, a steel structure support, a longitudinal trolley and a transverse trolley running mechanism, a safety device, a hydraulic system, and an electrical control system. The method includes the following steps: S1, Gray busbar positioning: The Gray busbar is installed above the concrete placing machine in a 360° circular arrangement to facilitate the concrete placing machine to rotate and position the material accurately; S2, 6 radar level meters are installed in each coal tower; S3, redundant limit protection proximity switch; 6 proximity switches are arranged at key positions in each coal tower. The coal tower has 6 unloading points. Travel switches are installed at the unloading points. The travel switches are triggered at the points to verify the encoder of the material placing machine and provide limit protection for it; S4, anti-blocking device; a travel switch is arranged at a key position in each coal tower, using a high-protection-level travel switch with a ball rocker and a 360° anti-blocking visual identification device installed on the coal tower.

2. The method for automatically distributing coal in a coal tower according to claim 1, characterized in that: The electrical control system includes machine-side mode, remote manual mode, remote automatic mode, trolley position control mode, automatic logic and interlocking control.

3. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: The machine-side mode is to switch the on-site operation box to local control. Local control is pure circuit control, which can start / stop the belt and trolley separately. The circuit is the start-stop circuit. Local circuit protection: 1) Thermal relay protection of belt and trolley; 2) If the belt is blocked, just stop the belt.

4. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: The remote manual mode is when the on-site operation box is switched to remote mode, and the manual mode is selected on the screen; manual mode: the belt "forward / reverse / start / stop" can be remotely controlled, and the trolley inputs the manual position on the screen to "start / stop" the moving trolley.

5. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: Remote automatic mode is to switch from the on-site operation box to the remote control, and select automatic mode on the screen; in automatic mode, press "Auto Start / Auto Stop" on the screen to start and stop the automatic mode; Special logic: After automatic start, the screen can be switched to manual mode. At this time, the belt keeps its original state and the trolley stops moving, which is convenient for manual intervention in warehouse shifting without stopping the belt. At the same time, the screen has an automatic prompt for remote failure, prompting the operator to switch back to automatic mode after manual action.

6. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: The trolley position control methods include trolley Gray bus positioning: if the Gray bus does not report a fault, select the Gray bus positioning; trolley limit switch positioning: if the Gray bus reports a fault, select the limit switch positioning.

7. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: Automatic logic includes belt automatic logic: the belt automatically starts and runs forward all the time, and stops when there is a fault; Automatic logic of large vehicle: 1) The trolley cyclically scans from the 1#-6# unloading position to the feeding position. If the current feeding position exceeds the high material level value, it will automatically move to the next feeding position; 2) When all five positions are at "high material level", the "high material level warning" is triggered, and the "coal distribution / preparation" is stopped in sequence; 3) The trolley does not move when the material level is too high at the material drop position, and the material level continues to exceed the "high limit material level" protection shutdown; 4) Remote material blockage: When the remote manual / automatic mode triggers the material blockage, the trolley runs in the reverse direction for a distance. As the trolley moves away from the material blockage, the switch is restored and the material blockage is re-triggered, and the trolley moves again. This way, the process is not frequently stopped due to material blockage. When the material blockage occurs, a prompt pops up on the screen, and the operator should promptly move the trolley in the reverse direction to other empty bin positions in the manual mode, and contact personnel to confirm the cleaning / on-site material blockage debris; 5) Trolley fault handling: Except for material blockage, which is a separate action, other fault screens will have prompts, but the belt will not stop running, only the trolley will stop running. The operator needs to pay attention to timely handling in this case.

8. The method for automatically distributing coal in a coal tower according to claim 2, characterized in that: The interlocking control includes 1) belt protection interlocking: when the screen selects belt interlocking, if the concrete placing machine belt stops running, the coal preparation process will be interlocked and stopped; 2) "Coal distribution / coal preparation" stop interlocking: "Material level is high" warning first triggers the shutdown of the coal distribution system, delays the shutdown of the coal preparation system, and then stops the concrete placing machine automatically.

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