Control method and control device for preventing material pressing of coke conveying belt conveyor

Abstract

The invention belongs to the technical field of coking production, and particularly relates to a control method and a control device for preventing a coke conveying belt conveyor from pressing materials. The control method is implemented based on operation of a control device, and the control device comprises a coke scraping plate and a coke conveying belt; a coke scraping motor connected with the coke scraping plate is connected with a coke scraping controller; a coke conveying belt driving motor connected with the coke conveying belt is connected with a coke conveying belt driving controller; a coke conveying belt operation control system connected with the coke conveying belt driving controller is connected with the coke scraping controller; and a coke conveying belt speed detector is arranged and is connected with the coke conveying belt operation control system. In the operation process, the coke conveying belt speed detector calculates to obtain a belt speed signal of the coke conveying belt and transmits the belt speed signal to the coke conveying belt operation control system; and the coke conveying belt operation control system sends a first-stage, second-stage or third-stage operation instruction to the coke scraping controller so as to control the operation frequency of the coke scraping controller. According to the control method, coke scraping and material pressing can be avoided, and the operation stability of the coke conveying system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coking production, and particularly relates to a control method and a control device for preventing a coke conveyor belt from pressing materials. Background Art

[0002] As the main product of coking production, coke plays a very important role in the metallurgical industry. During the coke transportation process, workers need to operate the coke hanging machine to scrape the coke onto the running coke conveyor belt. Because the coke conveyor belt is located below the coke hanging machine platform, workers cannot observe the operating status of the coke conveyor belt when standing on the coke scraping platform to operate the coke scraper. For example, if the coke conveyor belt is not detected in time that it is in a shutdown state and the coke scraper is continued to be operated, a large amount of coke can easily be scraped onto the coke conveyor belt, which cannot be transported normally through the belt conveyor, resulting in material compression, causing equipment overload, belt deviation, shutdown and other malfunctions. This problem not only affects the continuity of coking production, but may also cause equipment damage such as belt wear and motor burnout, affecting production.

[0003] Furthermore, manual operation cannot adjust the amount of coke scraped off in real time according to the belt speed. Low belt speed and high coke drop volumes can easily cause belt congestion. Currently, personnel are typically assigned to monitor the coke conveyor belt. If the belt stops, operators are promptly contacted to stop scraping. However, this approach still has a long response time and intervals, making belt congestion difficult to avoid.

[0004] Therefore, it is urgent to adopt a timely and scientific control method to prevent the coke conveyor belt from pressing the material. Summary of the Invention

[0005] The present invention aims to address the above-mentioned drawbacks by providing a control method for preventing the coke conveyor belt from pressing the material. This control method automatically shuts down the coke scraper system when the coke conveyor belt speed is low or the coke conveyor belt stops, thereby preventing further coke scraping and pressing, improving the operational stability of the coke conveyor system, and also enhancing its operating efficiency.

[0006] The technical solution of the present invention is: A control method for preventing a coke conveyor belt from pressing material comprises the following steps: First, the control method is implemented based on the following control device, which includes a scraping plate located on the upper surface of the focus table and a focus conveying belt located below the focus table.

[0007] One end of the scraping plate is fixed to a connecting rod via a rocker, which is connected to the output end of the scraping motor via a crank. The scraping motor is connected to the scraping controller via wiring. This connection is a common crank-connecting rod mechanism in the prior art. The scraping motor drives the crank to rotate, and the crank is connected to the scraping plate's rocker (a rotating shaft fixed to the frame) via a connecting rod. When the crank rotates, the connecting rod pushes the rocker to swing left and right around the fixed axis, thereby driving the scraping plate to swing.

[0008] The active roller of the focus conveying belt is connected to the focus conveying belt driving motor, and the focus conveying belt driving motor is connected to the focus conveying belt driving controller through a line; the focus conveying belt driving controller is connected to the focus conveying belt operation control system through a line, and the focus conveying belt operation control system is connected to the focus scraping controller line.

[0009] A focus conveying belt speed detector is provided on the lower surface of the focus conveying belt, and the focus conveying belt speed detector is connected to the focus conveying belt operation control system circuit. The focus conveying belt speed detector contacts the focus conveying belt at the bottom of the focusing platform.

[0010] During operation, the focus conveyor belt operation control system sends a focus conveyor belt operation command signal to the focus conveyor belt drive controller, and the focus conveyor belt drive controller sends a start command to the focus conveyor belt drive motor, and the focus conveyor belt drive motor drives the focus conveyor belt to operate.

[0011] The focus conveyor belt starts to run, driving the roller of the focus conveyor belt speed detector in contact with the lower surface of the focus conveyor belt to start rotating. The focus conveyor belt speed detector calculates the running speed of the focus conveyor belt based on the roller diameter and rotation speed, and transmits the calculated focus conveyor belt speed signal to the focus conveyor belt operation control system through the connecting line.

[0012] When the coke conveyor belt speed detector calculates that the coke conveyor belt speed R is less than 1m / s, the coke conveyor belt operation control system receives the speed signal and sends a stop instruction to the coke scraping controller. The operation button of the coke scraping controller is powered off and the coke scraping controller stops running, thereby preventing coke from continuing to be scraped onto the coke conveyor belt and avoiding the occurrence of material compression.

[0013] When the focus conveyor belt speed detector calculates that the focus conveyor belt speed is 1m / s≤R<1.5m / s, the focus conveyor belt operation control system receives the speed signal and sends a first-level instruction to the scraping controller to allow operation. The signal light of the first-level instruction on the dial of the scraping controller lights up, and the operator presses the corresponding first-level discharge button on the scraping controller to perform the scraping operation; among which, the first-level instruction is to control the scraping controller to operate at a frequency of less than 2Hz.

[0014] When the focus conveyor belt speed detector calculates that the focus conveyor belt speed is 1.5m / s≤R<1.8m / s, the focus conveyor belt operation control system receives the speed signal and sends a secondary instruction to the scraping controller to allow operation. The signal light of the secondary instruction on the dial of the scraping controller lights up, and the operator presses the corresponding secondary discharge button on the scraping controller to perform the scraping operation; wherein, the secondary instruction is to control the scraping controller to operate at a frequency greater than or equal to 2Hz and less than 5Hz.

[0015] When the focus conveyor belt speed detector calculates that the focus conveyor belt speed R ≥ 1.8m / s, the focus conveyor belt operation control system receives the speed signal and sends a three-level instruction to the scraping controller to allow operation. The signal light of the three-level instruction on the dial of the scraping controller lights up, and the operator presses the corresponding three-level discharge button on the scraping controller to perform the scraping operation; among them, the three-level instruction is to control the scraping controller to operate at a frequency greater than or equal to 5Hz and less than 8Hz.

[0016] A control device for preventing the coke conveyor belt from pressing materials in the above control method comprises a coke scraper plate located on the upper surface of the coke table and a coke conveyor belt located below the coke table.

[0017] One end of the scraping plate is fixed to the connecting rod through a rocker, and the connecting rod is connected to the output end of the scraping motor through a crank; the scraping motor is connected to the scraping controller through a circuit.

[0018] The active roller of the focus conveying belt is connected to the focus conveying belt driving motor, and the focus conveying belt driving motor is connected to the focus conveying belt driving controller through a line; the focus conveying belt driving controller is connected to the focus conveying belt operation control system through a line, and the focus conveying belt operation control system is connected to the focus scraping controller line.

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

[0020] Furthermore, the number of the scraping plates is at least 60.

[0021] Furthermore, the number of the scraping plates is 64.

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

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

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

[0025] The control method grades the operating instructions of the scraping controller according to the different actual belt speeds of the conveying belt, adopts a stepped operating frequency, so that the conveying belt and the scraping frequency are coupled, and the scraping amount can be strictly controlled according to the different belt speed conditions of the conveying belt, which not only avoids the coke material flow exceeding the material flow transported by the conveying belt and causing material compression, but also optimizes the transportation efficiency of the conveying belt in different belt speed sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the device for preventing the coke conveyor belt from pressing the material.

[0027] Among them, 1 is the coke table, 2 is the coke scraping plate, 3 is the coke scraping motor, 4 is the coke on the coke table, 5 is the coke scraping 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.

[0028] Figure 2 This is a flow chart of the control method for preventing the coke conveyor belt from pressing the material. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

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

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

[0032] The active roller of the focus conveying belt 9 is connected to the focus conveying belt driving motor 8, and the focus conveying belt driving motor 8 is connected to the focus conveying belt driving controller 6 through a line; the focus conveying belt driving controller 6 is connected to the focus conveying belt operation control system 11 through a line, and the focus conveying belt operation control system 11 is connected to the focus scraping controller 5 through a line.

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

[0034] Embodiment 2 The control method for preventing the coke conveying belt machine from pressing the coke, and the specific operation steps are as follows: During operation, the coke conveying belt operation instruction signal is transmitted from the coke conveying belt operation control system 11 to the coke conveying belt drive controller 6, the coke conveying belt drive controller 6 sends a start instruction to the coke conveying belt drive motor 8, and the coke conveying belt drive motor 8 drives the coke conveying belt 9 to operate.

[0035] When the coke conveying belt 9 starts to operate, the rollers of the coke conveying belt speed detector 7 in contact with the lower surface of the coke conveying belt 9 start to rotate, the coke conveying belt speed detector 7 calculates the operating speed of the coke conveying belt 9 according to the diameter and the number of rotations of the rollers, and transmits the calculated speed signal of the coke conveying belt 9 to the coke conveying belt operation control system 11 through the connecting line (such as an optical cable).

[0036] When the coke conveying belt speed detector 7 calculates that the speed R of the coke conveying belt 9 is less than 1 m / s, the coke conveying belt operation control system 11 receives the speed signal, and sends a stop operation instruction to the coke scraping controller 5, the operating button of the coke scraping controller 5 is powered off, and the coke scraping controller 5 stops operating, thereby preventing the coke 4 on the coke table from continuing to fall onto the coke conveying belt 9 and avoiding the occurrence of pressing.

[0037] When the coke conveying belt speed detector 7 calculates that the speed R of the coke conveying belt 9 is between 1 m / s and 1.5 m / s, the coke conveying belt operation control system 11 receives the speed signal, and sends a first-level operation instruction to the coke scraping controller 5, the signal light of the first-level instruction on the dial of the coke scraping controller 5 is on, the operator presses the corresponding first-level button on the coke scraping controller 5 to perform the coke scraping operation; wherein the first-level instruction is to control the coke scraping controller 5 to operate at a frequency less than 2 Hz.

[0038] When the coke conveying belt speed detector 7 calculates that the speed R of the coke conveying belt 9 is between 1.5 m / s and 1.8 m / s, the coke conveying belt operation control system 11 receives the speed signal, and sends a second-level operation instruction to the coke scraping controller 5, the signal light of the second-level instruction on the dial of the coke scraping controller 5 is on, the operator presses the corresponding second-level button on the coke scraping controller 5 to perform the coke scraping operation; wherein the second-level instruction is to control the coke scraping controller 5 to operate at a frequency greater than or equal to 2 Hz and less than 5 Hz.

[0039] When the coke feeding belt speed detector 7 calculates that the belt speed R of the coke feeding belt 9 is greater than or equal to 1.8 m / s, the coke feeding belt running control system 11 receives the signal of the belt speed, and then sends a three-level instruction to the coke scraping controller 5 to allow the coke scraping controller 5 to run at a frequency greater than or equal to 5 Hz and less than 8 Hz.

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

[0041] Comparative Example 2 The difference between the present comparative example and Example 2 is that when the belt speed of the coke feeding belt is 1.5 m / s≤R<1.8 m / s, the second-level instruction is to control the coke scraping controller to run at a frequency greater than or equal to 6 Hz and less than 8 Hz.

[0042] Comparative Example 3 The difference between the present comparative example and Example 2 is that when the belt speed of the coke feeding belt is greater than or equal to 1.8 m / s, the three-level instruction is to control the coke scraping controller to run at a frequency greater than or equal to 9 Hz and less than 11 Hz.

[0043] Comparative Example 4 The difference between the present comparative example and Example 2 is that when the belt speed of the coke feeding belt is greater than or equal to 1.8 m / s, the three-level instruction is to control the coke scraping controller to run at a frequency greater than or equal to 2 Hz and less than 4 Hz.

[0044] The pressing conditions of the coke feeding and the running efficiency of the coke feeding belt of Example 2 and Comparative Examples 1-4 are shown in Table 2.

[0045] Table 2: Pressing conditions and efficiency of coke feeding belt

[0046] As shown in Table 2, the control method described in the present application not only avoids the pressing condition of the coke feeding belt, but also improves the running efficiency of the coke feeding belt.

Claims

1. A control method for preventing coke conveyor belt from pressing material, characterized in that: The following steps are involved: First, the control method is implemented based on the following control device, which includes a scraping plate located on the upper surface of the coking table and a coking conveying belt located below the coking table; One end of the scraping plate is fixed to the connecting rod through a rocker, and the connecting rod is connected to the output end of the scraping motor through a crank; the scraping motor is connected to the scraping controller through a circuit; The active roller of the focus conveying belt is connected to the focus conveying belt driving motor, and the focus conveying belt driving motor is connected to the focus conveying belt driving controller through a circuit; The focus conveying belt driving controller is connected to the focus conveying belt operation control system through a line, and the focus conveying belt operation control system is connected to the focus scraping controller line; A focus conveying belt speed detector is provided on the lower surface of the focus conveying belt, and the focus conveying belt speed detector is connected to the focus conveying belt operation control system circuit; During operation, the focus conveyor belt operation control system sends a focus conveyor belt operation command signal to the focus conveyor belt drive controller, and the focus conveyor belt drive controller sends a start command and transmits it to the focus conveyor belt drive motor, and the focus conveyor belt drive motor drives the focus conveyor belt to operate; The focus conveyor belt starts to run, driving the roller of the focus conveyor belt speed detector in contact with the lower surface of the focus conveyor belt to start rotating. The focus conveyor belt speed detector calculates the speed of the focus conveyor belt based on the roller diameter and rotation speed, and transmits the calculated speed signal to the focus conveyor belt operation control system through the connecting line; When the focus conveyor belt speed detector calculates that the focus conveyor belt speed R is less than 1m / s, the focus conveyor belt operation control system receives the speed signal and sends a stop instruction to the focus scraping controller. The operation button of the focus scraping controller is powered off and the focus scraping controller stops running. When the coke conveyor belt speed detector calculates that the coke conveyor belt speed is 1m / s≤R<1.5m / s, the coke conveyor belt operation control system receives the speed signal and sends a first-level instruction to the coke scraping controller to allow operation. The first-level instruction signal light on the coke scraping controller dial lights up, and the operator presses the corresponding first-level discharge button on the coke scraping controller to perform the coke scraping operation. The first-level instruction controls the coke scraping controller to operate at a frequency of less than 2Hz. When the coke conveyor belt speed detector calculates that the coke conveyor belt speed is 1.5m / s≤R<1.8m / s, the coke conveyor belt operation control system receives the speed signal and sends a secondary instruction to the coke scraping controller to allow operation. The secondary instruction signal light on the coke scraping controller dial lights up, and the operator presses the corresponding secondary discharge button on the coke scraping controller to perform the coke scraping operation. The secondary instruction controls the coke scraping controller to operate at a frequency greater than or equal to 2Hz and less than 5Hz. When the focus conveyor belt speed detector calculates that the focus conveyor belt speed R ≥ 1.8m / s, the focus conveyor belt operation control system receives the speed signal and sends a three-level instruction to the scraping controller to allow operation. The signal light of the three-level instruction on the dial of the scraping controller lights up, and the operator presses the corresponding three-level discharge button on the scraping controller to perform the scraping operation; among them, the three-level instruction is to control the scraping controller to operate at a frequency greater than or equal to 5Hz and less than 8Hz.

2. A control device for preventing a coke conveyor belt from pressing material in the control method according to claim 1, characterized in that: It includes a coke scraper located on the upper surface of the coke table and a coke conveying belt located below the coke table; One end of the scraping plate is fixed to the connecting rod through a rocker, and the connecting rod is connected to the output end of the scraping motor through a crank; the scraping motor is connected to the scraping controller through a circuit; The active roller of the focus conveying belt is connected to the focus conveying belt driving motor, and the focus conveying belt driving motor is connected to the focus conveying belt driving controller through a circuit; The focus conveying belt driving controller is connected to the focus conveying belt operation control system through a line, and the focus conveying belt operation control system is connected to the focus scraping controller line; A focus conveying belt speed detector is provided on the lower surface of the focus conveying belt, and the focus conveying belt speed detector is connected to the focus conveying belt operation control system circuit.

3. The control device for preventing the coke conveyor belt from pressing the material according to claim 2, characterized in that: The number of the scraping plates is at least 60.

4. The control device for preventing the coke conveyor belt from pressing the material according to claim 3, characterized in that: The number of the scraping plates is 64.

5. The control device for preventing the coke conveyor belt from pressing the material according to claim 2, characterized in that: The distance between two adjacent rocking arms is 0.1-0.4m.

6. The control device for preventing the coke conveyor belt from pressing the material according to claim 5, characterized in that: The distance between two adjacent rocking arms is 0.2 m.

Images