System control device for keeping high-efficiency operation of production in process of replacing sintering pallet

Abstract

A system control device for keeping efficient operation of production in the process of replacing a sintering pallet relates to the technical field of ferrous metallurgy and comprises an iron plate arranged on a faulty pallet, a proximity switch arranged on a sintering machine and a flap valve arranged on one side of an air bellow, and a valve plate arranged on one side of the flap valve is mounted in the air bellow. The proximity switch is electrically connected with the flap valve, the flap valve is electrically connected with the sintering machine control system, the proximity switch is arranged at the position, close to the sintering end point, of the trolley, the flap valve is arranged on the air bellow at the position, and the iron plate is arranged on the fault trolley to trigger a control signal of the proximity switch, so that the flap valve is controlled; therefore, the air draft condition of the air bellow at the position is controlled, the fault trolley is replaced under the condition that normal trolley sintering production is not affected, and continuous and efficient operation of sintering production is ensured.

Description

Technical Field

[0001] This utility model relates to a system control device for maintaining efficient production during the replacement of sintering trolleys, and relates to the field of iron and steel metallurgy technology. Background Technology

[0002] The belt sintering machine is the main equipment in sintering production. It consists of a feeding device, ignition device, transmission device, track, trolley, bellows, sealing device, ventilation system, and frame. Among these, the trolley is a crucial component of the main sintering machine. During the movement of the trolley, the ventilation from the bellows keeps the sintering process running. The sintering process is complete when the trolley reaches the last bellows (or the penultimate bellows) at the tail of the sintering machine.

[0003] Sintering production is a complex physical and chemical process with harsh operating conditions. During production, the sintering trolley undergoes intermittent and periodic high-temperature baking, exhaust gas scouring and corrosion, and temperature fluctuations. The trolley is also a vulnerable part, and common trolley equipment problems include damaged heat insulation sleeves, burnt or missing grate bars, trolley wheels not rotating, and burnt and cracked side panels. Sintering production is a process carried out under continuous high negative pressure ventilation. Taking a 200m² sintering machine as an example, during normal production, the negative pressure of its air box is approximately -13kPa. If a trolley malfunctions, it is impossible to replace it under such high negative pressure conditions. The frequency of the sintering main exhaust fan and the fan damper need to be adjusted to maintain the negative pressure of the air box at a slightly negative pressure (-300Pa and below) before the trolley can be replaced. After the trolley replacement is completed, the operating parameters of the sintering main exhaust fan are restored to the parameters during normal production, which takes about 10 minutes (of which the trolley replacement takes about 3 minutes). During this period, the sintering production process is basically unable to proceed normally (stalled). At the same time, after production resumes (main exhaust fan frequency and fan damper), the sintering main machine needs to appropriately reduce its operating speed (compared to the machine speed during normal production, this lasts for about 30 minutes) to reasonably control the sintering endpoint and ensure the completion of the production process, thereby reducing production efficiency (product quality) and increasing process energy consumption. Therefore, a system control device that maintains efficient production operation during the replacement of the sintering trolley is proposed to solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies or shortcomings in the existing technology by providing a system control device that maintains efficient production during the replacement of sintering trolleys. This device is achieved by installing a proximity switch near the sintering endpoint of the trolley and a flap valve on the air box at that location. An iron plate on the faulty trolley triggers the proximity switch control signal to control the flap valve, thereby controlling the air extraction of the air box at that location. This allows for the replacement of faulty trolleys without affecting normal sintering production, ensuring the continuous and efficient operation of sintering production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes an iron plate 2 installed on the fault trolley 1, a proximity switch 4 installed on the sintering machine, a flap valve 6 installed on one side of the air box 7, a valve plate 5 installed on one side of the flap valve 6 installed inside the air box 7, the proximity switch 4 being electrically connected to the flap valve 6, and the flap valve 6 being electrically connected to the sintering machine control system.

[0006] Furthermore, the proximity switch 4 is provided with a switch mounting base 3 at its bottom.

[0007] Furthermore, the proximity switch 4 is located on the side of the sintering machine igniter away from the material feeder.

[0008] Furthermore, the valve plate 5 and the proximity switch 4 are respectively located in the housing and opening of the same air box 7.

[0009] Furthermore, the iron plate 2 includes a first vertical limiting part 21, a suspension part 22, a second vertical limiting part 23, and a sensing part 24. The first vertical limiting part 21 and the second vertical limiting part 23 are arranged in parallel. The suspension part 22 is vertically connected to the top of the first vertical limiting part 21 and the second vertical limiting part 23. The sensing part 24 is vertically arranged at the bottom of the second vertical limiting part 23.

[0010] Furthermore, the second vertical limiting portion 23 is longer than the first vertical limiting portion 21.

[0011] Furthermore, the trolley 1 is provided with an iron plate mounting groove 11 on its side.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by setting a proximity switch near the sintering endpoint of the trolley and setting a flap valve on the air box at that position, and setting an iron plate on the faulty trolley to trigger the proximity switch control signal to control the flap valve, the air extraction of the air box at that position can be controlled, so as to replace the faulty trolley without affecting the normal trolley sintering production, and ensure the continuous and efficient operation of sintering production. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Sectional view along the AA direction;

[0016] Figure 3 This is a schematic diagram of the structure of the iron plate 2 in this utility model;

[0017] Figure 4 This is a schematic diagram of the state of valve plate 5 when it is in the 0-degree position in this utility model;

[0018] Figure 5 This is a schematic diagram showing the state of valve plate 5 when it is at an 85-degree position in this utility model;

[0019] Figure 6 This is a schematic diagram of the replacement position of the faulty trolley 1 on the sintering machine in this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Fault trolley; 2. Iron plate; 3. Switch mounting base; 4. Proximity switch; 5. Valve plate; 6. Flip valve; 7. Air box; 11. Iron plate mounting groove; 21. First vertical limit part; 22. Suspension part; 23. Second vertical limit part; 24. Sensing part. Detailed Implementation

[0021] See Figures 1-6As shown, the technical solution adopted in this specific embodiment is as follows: It includes an iron plate 2 installed on the faulty trolley 1, a proximity switch 4 installed on the sintering machine, a flap valve 6 installed on one side of the air box 7, a valve plate 5 installed on one side of the flap valve 6 and installed inside the air box 7, the proximity switch 4 is electrically connected to the flap valve 6, and the flap valve 6 is electrically connected to the sintering machine control system. In traditional sintering systems, when a faulty trolley needs to be replaced, the parameters of the main exhaust fan need to be adjusted to reduce the air volume, and the sintering machine and the sintering mixing material feeding system need to be stopped. During this process, sintering production cannot proceed, affecting production efficiency. Therefore, in this embodiment, a... The bellows control system controls the replacement of bellows in different positions and is linked to the sintering machine. This is achieved by placing an iron plate on the faulty trolley and a proximity switch on the sintering machine. Taking a 200m² sintering machine as an example, the trolley is 3.5m wide and 1.5m long, with a sideboard height of 800mm and 21 bellows. The proximity switch is located at bellows number 18, which is in the direction away from the igniter. A flap valve is also installed at bellows number 18, with its valve plate inside the bellows to control the airflow. When the trolley malfunctions and moves away from the igniter, the operator hangs the iron plate... On the faulty trolley, the trolley continues to run. When the iron plate reaches above the proximity switch, a control signal is triggered to the flap valve. Under normal conditions, the valve plate is at the 0-degree position. After the proximity switch sends a control signal, the flap valve starts, and the valve plate rotates from the 0-degree position to the 85-degree position, thereby closing the No. 18 air box. This prevents further air extraction from the faulty trolley, thus stopping sintering production. When the valve plate rotates to the 85-degree position, a stop signal is triggered to the sintering machine and the sintering mixing material feeding system. The sintering machine and the sintering mixing material feeding system stop operating, and the trolley stops moving. However, the main exhaust fan continues to draw air, thus maintaining continuous negative pressure on the normal trolley. Sintering production continues. At this time, the operator can replace the faulty trolley and remove the iron plate for later use. After the replacement is completed, the operator controls the flap valve to reset. The valve plate returns from the 85-degree position to the 0-degree position, triggering the start signal. The sintering machine and the sintering mixing material feeding system are restarted. At this time, the speed of the sintering machine is preset to run slightly higher than the original speed for 10 minutes. During normal production, the trolley running speed is about 1.5 m / min, while the main machine running speed is controlled at 1.6 m / min. After running for 10 minutes, it returns to the original speed to ensure the continuous and efficient operation of sintering production.

[0022] More specifically, the proximity switch 4 is provided with a switch mounting base 3 at its bottom, which facilitates the installation of the proximity switch.

[0023] More specifically, the proximity switch 4 is located on the side of the igniter of the sintering machine away from the material feeder. Since the sintering operation has been completed at this position, it is the best position to set the proximity switch and replace the sintering machine.

[0024] More specifically, the valve plate 5 and the proximity switch 4 are respectively located at the box body and the opening of the same air box 7. The proximity switch is located at this air box. After the iron plate triggers the proximity switch control signal, the flap valve closes the air box, while other air boxes continue to draw air normally, thus ensuring that sintering production can continue to proceed efficiently.

[0025] More specifically, the iron plate 2 includes a first vertical limiting part 21, a suspension part 22, a second vertical limiting part 23, and a sensing part 24. The first vertical limiting part 21 and the second vertical limiting part 23 are arranged in parallel. The suspension part 22 is vertically connected to the top of the first vertical limiting part 21 and the second vertical limiting part 23. The sensing part 24 is vertically arranged at the bottom of the second vertical limiting part 23. The second vertical limiting part 23 is longer than the first vertical limiting part 21. In this embodiment, the iron plate is a key component for triggering the control signal. It has a suspension structure that is shorter inside and longer outside. The trolley 1 has an iron plate mounting groove 11 on its side. The first vertical limiting part and the second vertical limiting part are suspended in the iron plate mounting groove. Setting the second vertical limiting part to be longer than the first vertical limiting part allows it to be closer to the proximity switch, thereby effectively triggering the control signal.

[0026] The working principle of this utility model is as follows: When a malfunction is detected in a trolley, the operator immediately suspends the iron plate 2 on the iron plate mounting slot 11 after the malfunctioning trolley 1 passes the igniter. The malfunctioning trolley 1 continues to run. When the sensing part 24 of the iron plate 2 reaches above the proximity switch 4, it triggers the switch control signal, which is transmitted to the flap valve 6. The flap valve 6 activates the control valve plate 5 to rotate from 0 degrees to 85 degrees, thereby closing the air box 7. Meanwhile, the other air boxes continue to maintain negative pressure on the remaining normal trolleys under the suction of the main exhaust fan, ensuring the air supply to the trolleys. The sintering machine continues to operate efficiently. When valve plate 6 flips to 85 degrees, a stop signal is triggered, the sintering machine stops, and the sintering mixing material feeding system stops running. At this time, the faulty trolley 1 can be replaced, and iron plate 2 can be removed. After the replacement is completed, the operator restarts the flip valve 6, and valve plate 5 resets from the 85-degree position to 0 degrees, triggering a start signal. The sintering machine starts, and the sintering mixing material feeding system resumes operation. This achieves the goal of stopping only the sintering machine and the sintering mixing material feeding system, while the exhaust fan does not stop, ensuring the continuous and efficient operation of sintering production.

[0027] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A system control device for maintaining high-efficiency production during the replacement of sintering trolleys, characterized in that: It includes an iron plate (2) installed on the fault trolley (1), a proximity switch (4) installed on the sintering machine, a flap valve (6) installed on one side of the air box (7), a valve plate (5) installed on one side of the flap valve (6) installed inside the air box (7), the proximity switch (4) is electrically connected to the flap valve (6), and the flap valve (6) is electrically connected to the sintering machine control system.

2. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 1, characterized in that: The proximity switch (4) is provided with a switch mounting base (3) at its bottom.

3. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 1, characterized in that: The proximity switch (4) is located on the side of the igniter of the sintering machine away from the feeder.

4. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 1, characterized in that: The valve plate (5) and the proximity switch (4) are respectively located in the box and opening of the same air box (7).

5. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 1, characterized in that: The iron plate (2) includes a first vertical limiting part (21), a suspension part (22), a second vertical limiting part (23), and a sensing part (24). The first vertical limiting part (21) and the second vertical limiting part (23) are arranged in parallel. The suspension part (22) is vertically connected to the top of the first vertical limiting part (21) and the second vertical limiting part (23). The sensing part (24) is vertically arranged at the bottom of the second vertical limiting part (23).

6. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 5, characterized in that: The second vertical limiting part (23) is longer than the first vertical limiting part (21).

7. The system control device for maintaining high-efficiency production during the replacement of sintering trolleys according to claim 1, characterized in that: The trolley (1) is provided with an iron plate mounting groove (11) on its side.

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