A control method and control device for preventing material pressing of a coke delivery belt conveyor

Abstract

The present application belongs to the technical field of coking production, and particularly relates to a control method for preventing material pressing of a coke conveying belt and a control device thereof. The control method is based on the operation of the control device. The control device comprises a coke scraping plate and a coke conveying belt. A coke scraping motor connected to the coke scraping plate is connected to a coke scraping controller. A coke conveying belt driving motor connected to the coke conveying belt is connected to a coke conveying belt driving controller. A coke conveying belt operation control system connected to the coke conveying belt driving controller is connected to the coke scraping controller. A coke conveying belt speed detector is provided and connected to the coke conveying belt operation control system. In the operation process, the coke conveying belt speed detector calculates the belt speed signal of the coke conveying belt and transmits the signal to the coke conveying belt operation control system. The coke conveying belt operation control system sends a first-level, second-level or third-level instruction to the coke scraping controller, thereby controlling the operation frequency of the coke scraping controller. The control method can avoid coke scraping and pressing, and improve the operation stability of the coke conveying system.

Description

Technical Field

[0001] This invention belongs to the technical field of coking production, specifically relating to a control method and control device for preventing material from being crushed on a coking conveyor belt. Background Technology

[0002] Coke, as the main product of coking production, plays a vital role in the metallurgical industry. During coke transportation, workers operate a coke scraper to scrape coke onto the running coke conveyor belt. Because the conveyor belt is located below the coke scraper platform, workers operating the scraper from their platform cannot observe the conveyor belt's operating status. For example, if the conveyor belt is not detected as stopped in time, continuing to operate the scraper can easily cause a large amount of coke to fall onto the conveyor belt, preventing it from being properly transported. This can lead to material accumulation, equipment overload, belt misalignment, and shutdowns. This problem not only affects the continuity of coking production but can also cause belt wear, motor burnout, and other equipment damage, impacting production.

[0003] Furthermore, manual operation cannot adjust the amount of coke scraped off in a timely manner according to the belt speed, and the belt is prone to pressing on the conveyor belt due to low belt speed and large material drop. In current operation, personnel are generally assigned to monitor the coke conveyor belt. Once the belt stops, the operator is contacted to stop scraping the coke. However, this method still has a long reaction time and the long interval makes it difficult to avoid pressing on the belt.

[0004] Therefore, there is an urgent need for a timely and scientific control method to prevent material compression on the coke conveyor belt. Summary of the Invention

[0005] The purpose of this invention is to provide a control method to prevent coke conveyor belt from pressing material, addressing the aforementioned deficiencies. This control method automatically stops the coke scraper system when the coke conveyor belt speed is low or when the belt stops, thereby preventing continued coke scraping and pressing, improving the operational stability of the coke conveying system, and also enhancing its operational efficiency.

[0006] The technical solution of this invention is as follows: A method for preventing material crushing on a coke conveyor belt includes the following steps: First, the control method is implemented based on the following control device, which includes a coke scraper located on the upper surface of the coke table and a coke conveyor belt located below the coke table.

[0007] One end of the coke scraper is fixed to a connecting rod via a rocker arm, and the connecting rod is connected to the output end of the coke scraper motor via a crank. The coke scraper motor is connected to the coke scraper controller via wiring. This connection method is a common crank-connecting rod mechanism in the prior art. The coke scraper motor drives the crank to rotate, and the crank is connected to the rocker arm of the coke scraper (a rotating shaft fixed on the frame) via the connecting rod. When the crank rotates, the connecting rod pushes the rocker arm to swing left and right around the fixed shaft, thereby causing the coke scraper to swing.

[0008] The drive roller of the coke conveying belt is connected to the coke conveying belt drive motor, which is connected to the coke conveying belt drive controller via a line; the coke conveying belt drive controller is connected to the coke conveying belt operation control system via a line, and the coke conveying belt operation control system is connected to the coke scraper controller via a line.

[0009] A coke conveyor belt speed detector is installed on the lower surface of the coke conveyor belt, and this detector is connected to the wiring of the coke conveyor belt operation control system. The coke conveyor belt speed detector is in contact with the coke conveyor belt at the bottom of the coke table.

[0010] During operation, the coke conveyor belt operation control system sends a coke conveyor belt operation command signal to the coke conveyor belt drive controller, which then sends a start command to the coke conveyor belt drive motor, which in turn drives the coke conveyor belt to run.

[0011] When the coke conveyor belt starts running, it drives the rollers of the coke conveyor belt speed detector, which are in contact with the lower surface of the coke conveyor belt, to start rotating. The coke conveyor belt speed detector calculates the running speed of the coke conveyor belt based on the roller diameter and the number of rotations, and transmits the calculated coke conveyor belt speed signal to the coke conveyor belt running control system through the connection line.

[0012] When the coke conveyor belt speed detector calculates that the belt speed R of the coke conveyor belt is less than 1 m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a stop operation command to the coke scraper controller. The operation button of the coke scraper controller is de-energized, and the coke scraper controller stops operating, thereby preventing coke from continuing to be scraped onto the coke conveyor belt and avoiding material compression.

[0013] When the coke conveyor belt speed detector calculates that the belt speed of the coke conveyor belt is 1m / s≤R<1.5m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a first-level operation permission command to the coke scraper controller. The first-level command indicator light on the coke scraper controller dial lights up, and the operator presses the corresponding first-level feeding button on the coke scraper controller to perform the coke scraping operation. The first-level command controls the coke scraper controller to operate at a frequency of less than 2Hz.

[0014] When the coke conveyor belt speed detector calculates that the belt speed is between 1.5m / s and R < 1.8m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a secondary command to the coke scraper controller to allow operation. The indicator light for the secondary command on the coke scraper controller panel illuminates, and the operator presses the corresponding secondary feeding button on the coke scraper controller to perform the coke scraping operation. The secondary command controls the coke scraper controller to operate at a frequency greater than or equal to 2Hz and less than 5Hz.

[0015] When the coke conveyor belt speed detector calculates that the belt speed R of the coke conveyor belt is ≥1.8m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a level 3 permission command to the coke scraper controller. The level 3 command indicator light on the coke scraper controller panel will light up, and the operator will press the corresponding level 3 feeding button on the coke scraper controller to perform the coke scraping operation. The level 3 command controls the coke scraper controller to operate at a frequency greater than or equal to 5Hz and less than 8Hz.

[0016] A control device for preventing coke conveyor belt from pressing material in the above control method includes a coke scraper located on the upper surface of the coke platform and a coke conveyor belt located below the coke platform.

[0017] One end of the coke scraper is fixed to the connecting rod by a rocker arm, and the connecting rod is connected to the output end of the coke scraper motor by a crank; the coke scraper motor is connected to the coke scraper controller by a circuit.

[0018] The drive roller of the coke conveying belt is connected to the coke conveying belt drive motor, which is connected to the coke conveying belt drive controller via a line; the coke conveying belt drive controller is connected to the coke conveying belt operation control system via a line, and the coke conveying belt operation control system is connected to the coke scraper controller via a line.

[0019] A coke conveyor belt speed detector is provided on the lower surface of the coke conveyor belt, and the coke conveyor belt speed detector is connected to the circuit of the coke conveyor belt operation control system.

[0020] Furthermore, the number of coke scrapers is at least 60.

[0021] Furthermore, the number of coke scrapers is 64.

[0022] Furthermore, the distance between two adjacent rocker arms is 0.1-0.4 meters.

[0023] Furthermore, the distance between two adjacent rocker arms is 0.2 meters.

[0024] The beneficial effects of the present invention are as follows: When the coking conveyor belt does not reach the minimum operating speed for scraping coke or stops, the coking conveyor belt operation control system prevents the scraping controller from operating through the program, and the scraping machine system automatically stops, thereby avoiding continued scraping and pressing of coke and improving the operational stability of the coking system.

[0025] The control method classifies the operating frequency of the coke scraper controller according to the different actual belt speeds of the coke conveyor belt, and adopts a stepped operating frequency to couple the coke conveyor belt and the coke scraping frequency. This enables strict control of the amount of coke scraped according to the different belt speed conditions of the coke conveyor belt. This not only avoids the coke material flow rate from exceeding the material flow rate transported by the coke conveyor belt and causing material compression, but also optimizes the transport efficiency of the conveyor belt at different belt speeds. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the device for preventing material crushing on the coke conveyor belt.

[0027] Among them, 1 is the coke platform, 2 is the coke scraper, 3 is the coke scraper motor, 4 is the coke on the coke platform, 5 is the coke scraper controller, 6 is the coke conveyor belt drive controller, 7 is the coke conveyor belt speed detector, 8 is the coke conveyor belt drive motor, 9 is the coke conveyor belt, 10 is the connecting rod, 11 is the coke conveyor belt operation control system, and 12 is the rocker arm.

[0028] Figure 2 The flowchart is a control method for preventing material compression on the coke conveyor belt. Detailed Implementation

[0029] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] Example 1 The control device for preventing material compression on the coke conveyor belt in the above control method includes a coke scraper 2 located on the upper surface of the coke platform 1 and a coke conveyor belt 9 located below the coke platform 1.

[0031] One end of the coke scraper 2 is fixed to the connecting rod 10 by a rocker arm 12, and the connecting rod 10 is connected to the output end of the coke scraper motor 3 by a crank; the coke scraper motor 3 is connected to the coke scraper controller 5 by a circuit.

[0032] The drive roller of the coke conveying belt 9 is connected to the coke conveying belt drive motor 8, which is connected to the coke conveying belt drive controller 6 via a line; the coke conveying belt drive controller 6 is connected to the coke conveying belt operation control system 11 via a line, and the coke conveying belt operation control system 11 is connected to the coke scraper controller 5 via a line.

[0033] A coke conveyor belt speed detector 7 is provided on the lower surface of the coke conveyor belt 9, and the coke conveyor belt speed detector 7 is connected to the coke conveyor belt operation control system 11.

[0034] Example 2 The specific operating steps of the control method for preventing material crushing on the coke conveyor belt are as follows: During operation, the coke conveyor belt operation control system 11 sends a coke conveyor belt operation command signal to the coke conveyor belt drive controller 6, and the coke conveyor belt drive controller 6 sends a start command to the coke conveyor belt drive motor 8, which drives the coke conveyor belt 9 to run.

[0035] When the coke conveyor belt 9 starts running, it drives the roller of the coke conveyor belt speed detector 7, which is in contact with the lower surface of the coke conveyor belt 9, to start rotating. The coke conveyor belt speed detector 7 calculates the running speed of the coke conveyor belt 9 based on the roller diameter and the number of rotations, and transmits the calculated coke conveyor belt speed signal to the coke conveyor belt running control system 11 through a connecting line (such as an optical cable).

[0036] When the coke conveyor belt speed detector 7 calculates that the belt speed R of the coke conveyor belt 9 is less than 1 m / s, the coke conveyor belt operation control system 11 receives the signal of the belt speed and sends a stop operation command to the coke scraper controller 5. The operation button of the coke scraper controller 5 is de-energized, and the coke scraper controller 5 stops operating, thereby preventing the coke 4 on the coke platform from continuing to be scraped onto the coke conveyor belt 9 and avoiding the occurrence of material pressing.

[0037] When the coke conveyor belt speed detector 7 calculates that the speed of the coke conveyor belt 9 is 1m / s≤R<1.5m / s, the coke conveyor belt operation control system 11 receives the signal of this belt speed and sends a first-level operation permission command to the coke scraper controller 5. The first-level command indicator light on the dial of the coke scraper controller 5 illuminates, and the operator presses the corresponding first-level feeding button on the coke scraper controller 5 to perform the coke scraping operation. The first-level command controls the coke scraper controller 5 to operate at a frequency of less than 2Hz.

[0038] When the coke conveyor belt speed detector 7 calculates that the belt speed of the coke conveyor belt 9 is 1.5m / s≤R<1.8m / s, the coke conveyor belt operation control system 11 receives the signal of this belt speed and sends a secondary operation permission command to the coke scraper controller 5. The secondary command indicator light on the dial of the coke scraper controller 5 illuminates, and the operator presses the corresponding secondary material feeding button on the coke scraper controller 5 to perform the coke scraping operation. The secondary command controls the coke scraper controller 5 to operate at a frequency greater than or equal to 2Hz and less than 5Hz.

[0039] When the coke conveyor belt speed detector 7 calculates that the belt speed R of the coke conveyor belt 9 is ≥ 1.8 m / s, the coke conveyor belt operation control system 11 receives the signal of the belt speed and sends a level 3 permission command to the coke scraper controller 5. The level 3 command indicator light on the dial of the coke scraper controller 5 lights up, and the operator presses the corresponding level 3 feeding button on the coke scraper controller 5 to perform the coke scraping operation. The level 3 command controls the coke scraper controller 5 to operate at a frequency greater than or equal to 5 Hz and less than 8 Hz.

[0040] Comparative Example 1 The difference between this comparative example and Example 2 is that when the belt speed of the coke conveyor belt is 1m / s≤R<1.5m / s, the first-level command is to control the coke scraper controller to operate at a frequency of less than 1Hz.

[0041] Comparative Example 2 The difference between this comparative example and Example 2 is that when the belt speed of the coke conveyor belt is 1.5m / s≤R<1.8m / s, the secondary command is to control the coke scraper controller to operate at a frequency greater than or equal to 6Hz and less than 8Hz.

[0042] Comparative Example 3 The difference between this comparative example and Example 2 is that when the belt speed R of the coke conveyor belt is greater than or equal to 1.8 m / s, the third-level command is to control the coke scraper controller to operate at a frequency greater than or equal to 9 Hz and less than 11 Hz.

[0043] Comparative Example 4 The difference between this comparative example and Example 2 is that when the belt speed R of the coke conveyor belt is greater than or equal to 1.8 m / s, the third-level command is to control the coke scraper controller to operate at a frequency greater than or equal to 2 Hz and less than 4 Hz.

[0044] The pressing conditions and operating efficiency of the coke conveying belts in Example 2 and Comparative Examples 1-4 are detailed in Table 2.

[0045] Table 2. Material pressing conditions and coke conveyor belt efficiency

[0046] As can be seen from Table 2, the control method described in this invention not only avoids material compression on the coke conveyor belt, but also improves the operating efficiency of the coke conveyor belt.

Claims

1. A control method for preventing material crushing on a coke conveyor belt, characterized in that, Includes the following steps: First, the control method is implemented based on the following control device, which includes a coke scraper located on the upper surface of the coke table and a coke conveyor belt located below the coke table; One end of the coke scraper is fixed to the connecting rod by a rocker arm, and the connecting rod is connected to the output end of the coke scraper motor by a crank; the coke scraper motor is connected to the coke scraper controller by a circuit. The drive roller of the coke conveyor belt is connected to the coke conveyor belt drive motor, which is connected to the coke conveyor belt drive controller via a line. The coke conveyor belt drive controller is connected to the coke conveyor belt operation control system via a circuit, and the coke conveyor belt operation control system is connected to the coke scraper controller via a circuit. A coke conveyor belt speed detector is provided on the lower surface of the coke conveyor belt, and the coke conveyor belt speed detector is connected to the circuit of the coke conveyor belt operation control system. During operation, the coking belt operation control system sends a coking belt operation command signal to the coking belt drive controller, which then sends a start command to the coking belt drive motor, which in turn drives the coking belt to run. When the coke conveyor belt starts running, it drives the roller of the coke conveyor belt speed detector, which is in contact with the lower surface of the coke conveyor belt, to start rotating. The coke conveyor belt speed detector calculates the belt speed of the coke conveyor belt based on the roller diameter and the number of rotations, and transmits the calculated belt speed signal to the coke conveyor belt operation control system through the connection line. When the coke conveyor belt speed detector calculates that the coke conveyor belt speed R < 1m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a stop operation command to the coke scraper controller. The operation button of the coke scraper controller is de-energized, and the coke scraper controller stops operating. When the coke conveyor belt speed detector calculates that the belt speed is 1m / s≤R<1.5m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a first-level operation permission command to the coke scraper controller. The first-level command indicator light on the coke scraper controller panel illuminates, and the operator presses the corresponding first-level material feeding button on the coke scraper controller to perform the coke scraping operation. The first-level command controls the coke scraper controller to operate at a frequency of less than 2Hz. When the coke conveyor belt speed detector calculates that the belt speed is between 1.5 m / s and R < 1.8 m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a secondary operation permission command to the coke scraper controller. The secondary command indicator light on the coke scraper controller panel illuminates, and the operator presses the corresponding secondary material feeding button on the coke scraper controller to perform the coke scraping operation. The secondary command controls the coke scraper controller to operate at a frequency greater than or equal to 2 Hz and less than 5 Hz. When the coke conveyor belt speed detector calculates that the belt speed R of the coke conveyor belt is ≥1.8m / s, the coke conveyor belt operation control system receives the signal of this belt speed and sends a level 3 permission command to the coke scraper controller. The level 3 command indicator light on the coke scraper controller panel will light up, and the operator will press the corresponding level 3 feeding button on the coke scraper controller to perform the coke scraping operation. The level 3 command controls the coke scraper controller to operate at a frequency greater than or equal to 5Hz and less than 8Hz.

2. A control device for preventing material crushing on a coke conveyor belt in the control method of claim 1, characterized in that, This includes the coke scraper located on the upper surface of the coke table and the coke conveyor belt located below the coke table; One end of the coke scraper is fixed to the connecting rod by a rocker arm, and the connecting rod is connected to the output end of the coke scraper motor by a crank; the coke scraper motor is connected to the coke scraper controller by a circuit. The drive roller of the coke conveyor belt is connected to the coke conveyor belt drive motor, which is connected to the coke conveyor belt drive controller via a line. The coke conveyor belt drive controller is connected to the coke conveyor belt operation control system via a circuit, and the coke conveyor belt operation control system is connected to the coke scraper controller via a circuit. A coke conveyor belt speed detector is provided on the lower surface of the coke conveyor belt, and the coke conveyor belt speed detector is connected to the circuit of the coke conveyor belt operation control system.

3. The control device for preventing material crushing on a coke conveyor belt according to claim 2, characterized in that, The number of coke scrapers is at least 60.

4. The control device for preventing material crushing on a coke conveyor belt according to claim 3, characterized in that, The number of coke scrapers is 64.

5. The control device for preventing material crushing on a coke conveyor belt according to claim 2, characterized in that, The distance between two adjacent joysticks is 0.1-0.4m.

6. The control device for preventing material crushing on a coke conveyor belt according to claim 5, characterized in that, The distance between two adjacent rocker arms is 0.2m.

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