Method for capturing pouring fumes and cooling fumes of an automatic pouring line

Abstract

The application discloses a kind of automatic pouring line's pouring flue gas and cooling flue gas trapping method, comprising: S1, when pouring machine reaches pouring station, smoke baffle retracts, the trigger on it drives air volume adjusting plate to rotate, so that the superimposed area of wind baffle section and fire baffle reduces, increase the ventilation of cover, at this time, pouring machine pours, cover carries out the trapping of pouring flue gas;S2, when pouring work is completed, smoke baffle extends, the trigger on it gradually separates from air volume adjusting plate, air volume adjusting plate turns into vertical state under the action of gravity, the superimposed area of wind baffle section and fire baffle becomes larger, cover carries out the trapping of smaller air volume cooling flue gas;Meanwhile, pouring machine moves to next pouring station.By measurement, the trapping rate of pouring flue gas and cooling flue gas of the application is greater than 90%.Ventilation reduces 20-30%, total amount of pollutant emission reduces about 20%, energy-saving amount can reduce 20-30%, operating cost reduces 30-40%, operating energy consumption reduces 20-30%.

Description

Technical Field

[0001] This invention relates to the field of casting and pouring fume collection technology, and in particular to a method for collecting pouring and cooling fumes from an automated pouring line. Background Technology

[0002] my country is a major global producer of castings, accounting for approximately 50% of the world's total output, with automotive castings making up about 28.5% of that. Automated casting machines are commonly used in the casting of automotive parts. In automated casting production lines, the automatic casting machine moves along a track and begins casting when it reaches the sand mold. A large amount of fumes generated during casting are captured by a fume hood located on the other side of the mold. Afterward, as the sand mold cools, it continuously emits high-temperature fumes, which also need to be captured by a fume hood and sent to a purification system for final emission. Compared to the casting fumes, the cooling fumes are smaller in volume. However, existing fume hoods are designed for maximum ventilation during casting, and the ventilation volume of each fume hood is not adjustable. Therefore, the overall ventilation volume of the fume collection system is large, resulting in high system investment, high energy consumption, and high operating costs. In a green and low-carbon environment, these issues will be significant bottlenecks restricting the high-quality development of the foundry industry. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a method for capturing pouring flue gas and cooling flue gas in an automated pouring line, specifically employing the following technical solution:

[0004] The method for collecting pouring flue gas and cooling flue gas in an automatic pouring line according to the present invention is implemented by a collection device, which includes a plurality of collection hood units corresponding to the pouring stations. Each collection hood unit includes...

[0005] The cover is set on one side of the pouring station, and has an inlet end that is close to the pouring station and an outlet end that is far away from the pouring station;

[0006] A fire-resistant plate is installed at the inlet end of the enclosure.

[0007] An airflow regulating plate is disposed on the front side of the fire arrestor plate. The airflow regulating plate is hinged to the cover and has a trigger section located above the hinge point and a windproof section located below the hinge point.

[0008] The smoke baffle is slidably mounted on the top of the hood, having a first position above the pouring station for smoke blocking and a second position retracted above the hood for easy pouring operations. The smoke baffle is also provided with a trigger element adapted to the trigger section of the air volume regulating plate.

[0009] The methods for capturing casting flue gas and cooling flue gas include:

[0010] S1, when the casting machine reaches the casting station, the smoke baffle moves from the first position to the second position, and the trigger on it drives the air volume regulating plate to rotate, so that the overlapping area of ​​the wind baffle section and the fire arrestor plate is reduced, and the ventilation volume of the hood is increased. At this time, the casting machine performs the casting work, and the hood captures the casting smoke.

[0011] S2, after the pouring work is completed, the smoke baffle moves from the second position to the first position, and the trigger on it gradually detaches from the air volume regulating plate. The air volume regulating plate turns into a vertical state under the action of gravity, and the overlapping area of ​​its wind-blocking section and the fire-arresting plate increases, and the hood collects cooling flue gas with a smaller air volume; at the same time, the pouring machine moves to the next pouring station.

[0012] Preferably, the outlet ends of the enclosure are all connected to the main exhaust pipe via exhaust branch pipes, and each exhaust branch pipe is equipped with a fire damper. The main exhaust pipe is connected to the purification system. The aforementioned fire dampers can effectively prevent flames and sparks generated during the pouring process from entering the enclosure and causing the pipes to catch fire.

[0013] Preferably, the pouring machine of the automatic pouring line is set on a longitudinal track on the other side of the pouring station.

[0014] Preferably, the fire-resistant plate has a zigzag or wavy structure, and the fire-resistant plate is connected to the cover by a snap-fit ​​connection. The aforementioned fire-resistant plate is a modular product, allowing for mass production and easy installation and replacement.

[0015] Preferably, the airflow regulating plate is a bent plate with an included angle between the trigger section and the wind-blocking section. The trigger section extends obliquely upward towards the pouring station, and the height of the wind-blocking section is less than the height of the fire-arresting plate. The connection between the trigger section and the wind-blocking section is hinged to the top plate of the hood. Through the triggering mechanism between the smoke baffle and the airflow regulating plate, the airflow of the airflow regulating plate can be mechanically adjusted. This design is ingenious, low-cost, and safe and reliable.

[0016] Preferably, the smoke baffle is connected to the top plate of the hood via a sliding guide rail, and the top plate of the hood is equipped with a drive mechanism for connecting the smoke baffle. A sensor for detecting the position of the casting machine is installed near the casting station. The signal output terminal of the sensor is electrically connected to the signal input terminal of the control center, and the control output terminal of the control center is electrically connected to the control input terminal of the drive mechanism. This design enables automatic control of the casting machine, smoke baffle, and airflow regulating plate, providing sensitive response and reliable operation.

[0017] Preferably, the trigger is a convex plate disposed at the bottom of the smoke baffle, and the lower edge of the convex plate is lower than the upper edge of the trigger section of the airflow regulating plate.

[0018] Preferably, an elastic seal is provided between the cover and the smoke baffle to prevent smoke and dust from escaping from the gap between the cover and the smoke baffle.

[0019] The present invention provides a method for capturing pouring and cooling fumes in an automatic pouring line. By installing a retractable baffle plate at the top of the capture hood, the normal pouring process is not affected, while the airflow organization for capturing cooling fumes from the sand mold is optimized. This effectively reduces equipment ventilation while ensuring effective fume capture, thereby reducing equipment investment and operating energy consumption. Secondly, an airflow regulating plate that mechanically links with the baffle plate is installed at the inlet end of the capture hood, allowing the airflow regulating plate to automatically adjust the capture hood as the baffle plate extends and retracts. The air inlet area of ​​the enclosure further optimizes the excess ventilation caused by the difference in air volume between casting fumes and sand mold cooling fumes. The aforementioned mechanical linkage structure is safe and reliable, and is very suitable for the ultra-high temperature environment of the casting site. Furthermore, a fire arrestor plate is installed at the inlet end of the enclosure to effectively prevent casting flames or sparks from entering the ventilation duct and causing duct fires. In addition, fire dampers are installed on each exhaust branch pipe, and the opening and closing of the fire dampers are controlled by the temperature change inside the duct, further improving the system safety.

[0020] Calculations show that the capture rate of both casting flue gas and cooling flue gas in this invention is greater than 90%. Compared with existing technologies, this invention can reduce ventilation volume by 20-30%, reduce total pollutant emissions by about 20%, reduce energy saving by 20-30%, reduce operating costs by 30-40%, and reduce operating energy consumption by 20-30%, thereby effectively improving the occupational health environment in the workshop and demonstrating good green, low-carbon, environmentally friendly, and economic benefits. Attached Figure Description

[0021] Figure 1 This is a schematic diagram (top view) of the automatic pouring line in this invention.

[0022] Figure 2 yes Figure 1 AA section view.

[0023] Figure 3 yes Figure 2 A schematic diagram showing the positional relationship between the middle smoke baffle and the air volume regulating plate.

[0024] Figure 4 yes Figure 1 BB cross-section diagram.

[0025] Figure 5 yes Figure 4 A schematic diagram showing the positional relationship between the middle smoke baffle and the air volume regulating plate.

[0026] Figure 6 This is a simulation diagram of smoke capture using a traditional smoke hood.

[0027] Figure 7This is a simulation diagram of the smoke collection of the smoke hood of the present invention. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0029] like Figure 1 As shown, the method for capturing pouring flue gas and cooling flue gas in the automatic pouring line of the present invention is implemented by a capture device. The capture device includes several capture hood units 1 corresponding to the pouring stations, and all capture hood units 1 are located on the same side of the pouring station. The outlet end of each capture hood unit 1 is connected to the exhaust main duct 3 through an exhaust branch pipe 2. The exhaust main duct 3 is connected to the purification system, so that the pouring flue gas and cooling flue gas entering the capture hood unit 1 can be discharged in compliance with standards. A longitudinal track 4 is provided on the other side of the pouring station. An automatic pouring machine 5 is slidably installed on the longitudinal track 4. When the automatic pouring machine 5 reaches the preset station, it automatically stops and moves to the next station after completing the pouring operation.

[0030] like Figure 2-5 As shown, each of the above-mentioned trapping hood units 1 consists of a hood body 11, a fire-resistant plate 12, an airflow regulating plate 13, and a smoke baffle 14. The hood body 11 is located on the side above the casting station, with an inlet end near the casting station and an outlet end away from the casting station. The fire-resistant plate 12 is a modular product that can be mass-produced. Its fire-resistant surface adopts a zigzag or wavy structure, and its edges are connected to the hood body 11 with snap-fit ​​fasteners, making installation and replacement convenient and quick. Preferably, a 280°C fire damper 6 is installed on each exhaust branch pipe 2. The fire damper 6 automatically opens and closes according to the temperature change inside the pipe, effectively preventing flames and sparks generated during the casting process from entering the hood body and causing pipe fire, further improving system safety.

[0031] The airflow regulating plate 13 is located in front of the flame arrestor plate 12 and is hinged to the cover 11. It has a trigger section 131 above the hinge point and a wind-blocking section 132 below the hinge point. Typically, the airflow regulating plate 13 is a bent plate with the trigger section 131 and the wind-blocking section 132 forming an angle. The trigger section 131 extends obliquely upwards towards the pouring station, and the height of the wind-blocking section 132 is less than the height of the flame arrestor plate 12. The connection between the trigger section 131 and the wind-blocking section 132 is hinged to the top plate of the cover 11. By flipping the airflow regulating plate 13, the size of the air intake area of ​​the flame arrestor plate 12 can be adjusted.

[0032] The smoke baffle 14 is located at the top of the hood 11, and the two are connected by a sliding guide rail 15. A drive mechanism 16 for connecting the smoke baffle 14 is also installed on the top plate of the hood 11. This drive mechanism 16 can be an electric screw, a cylinder, a hydraulic cylinder, etc. Under the action of the drive mechanism 16, the smoke baffle 14 extends and retracts along a direction perpendicular to the longitudinal track 4, having a first position above the pouring station for smoke blocking (which can optimize the airflow during cooling smoke collection) and a second position retracted above the hood 11 for easy pouring operations. In addition, the smoke baffle 14 is also provided with a trigger element 17 adapted to the trigger section 131 of the airflow regulating plate 13. Preferably, the trigger element 17 is a protruding plate located at the bottom of the smoke baffle 14, with its lower edge lower than the upper edge of the trigger section 131 of the airflow regulating plate 13. As the smoke baffle 14 moves from the first position to the second position, the trigger 17 gradually comes into contact with the trigger section 131 of the airflow regulating plate 13, and then continues to move backward, pushing the trigger section 131 to flip backward around the hinge point under the action of the trigger 17. The wind-blocking section 132 of the airflow regulating plate 13 then flips forward around the hinge point until it flips to a horizontal position (see...). Figure 4 At this point, the air inlet area of ​​the cover 11 is at its maximum. Conversely, when the smoke baffle 14 moves from the second position to the first position, as the trigger 17 leaves the trigger section 131 of the airflow regulating plate 13, the wind-blocking section 132 rotates to its final vertical state under the action of gravity (see...). Figure 3 At this point, the air inlet area of ​​the hood 11 is at its smallest. The mechanical triggering mechanism between the smoke baffle 14 and the air volume regulating plate 13 can easily adjust the air volume of the hood. Its ingenious structure, low cost, and safety and reliability make it very suitable for the ultra-high temperature environment of casting operations.

[0033] Typically, a sensor for detecting the position of the pouring machine 5 is installed near the pouring station. The signal output of this sensor is electrically connected to the signal input of the control center, and the control output of the control center is electrically connected to the control input of the drive mechanism 16 of the smoke baffle 14. When the sensor detects that the pouring machine 5 has reached the pouring position, the control center sends a signal to the drive mechanism 16 to retract the smoke baffle 14. During the retraction of the smoke baffle 14, the airflow regulating plate 13 opens (i.e., flips to the horizontal position) under the action of the mechanical trigger mechanism. Conversely, when the sensor detects that the pouring machine 5 has left the pouring position, the drive mechanism 16 receives a signal to extend the smoke baffle 14. During the extension of the smoke baffle 14, the airflow regulating plate 13 closes again (i.e., flips to the vertical position) under the action of the mechanical trigger mechanism. The cooperation of the above-mentioned automatic control mechanism and mechanical linkage mechanism can realize the automatic control of the pouring machine 5, the smoke baffle 14, and the airflow regulating plate 13, which is sensitive, safe, and reliable.

[0034] Furthermore, an elastic seal 18 is installed between the hood 11 and the smoke baffle 14 to prevent smoke and dust from escaping through the gap between the hood 11 and the smoke baffle 14.

[0035] The method for capturing pouring flue gas and cooling flue gas in an automatic pouring line according to the present invention includes:

[0036] S1, when the casting machine reaches the casting station, the smoke baffle 14 moves from the first position to the second position, and the trigger 17 on it drives the air volume regulating plate 13 to rotate, so that the overlapping area of ​​the wind baffle section and the fire arrestor plate 12 is reduced, and the ventilation volume of the hood 11 is increased. At this time, the casting machine performs the casting work, and the hood 11 captures the casting smoke.

[0037] S2, after the pouring work is completed, the smoke baffle 14 moves from the second position to the first position, and the trigger 17 on it gradually detaches from the air volume regulating plate 13. The air volume regulating plate 13 turns into a vertical state under the action of gravity, and the overlapping area of ​​its wind-blocking section and the fire-arresting plate 12 becomes larger. The hood 11 collects cooling flue gas with a smaller air volume. At the same time, the pouring machine moves to the next pouring station.

[0038] It should be noted that in the description of this invention, terms such as "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

Claims

1. A method for collecting pouring flue gas and cooling flue gas in an automatic pouring line, implemented by a collection device, characterized in that: The collection device includes several collection hood units corresponding to the pouring stations, each collection hood unit comprising... The cover is set on one side of the pouring station, and has an inlet end that is close to the pouring station and an outlet end that is far away from the pouring station; A fire-resistant plate is installed at the inlet end of the enclosure. An airflow regulating plate is disposed on the front side of the fire arrestor plate. The airflow regulating plate is hinged to the cover and has a trigger section located above the hinge point and a windproof section located below the hinge point. The smoke baffle is slidably mounted on the top of the hood, having a first position above the pouring station for smoke blocking and a second position retracted above the hood for easy pouring operations. The smoke baffle is also provided with a trigger element adapted to the trigger section of the air volume regulating plate. The methods for capturing casting flue gas and cooling flue gas include: S1, when the casting machine reaches the casting station, the smoke baffle moves from the first position to the second position, and the trigger on it drives the air volume regulating plate to rotate, so that the overlapping area of ​​the wind baffle section and the fire arrestor plate is reduced, and the ventilation volume of the hood is increased. At this time, the casting machine performs the casting work, and the hood captures the casting smoke. S2, after the pouring work is completed, the smoke baffle moves from the second position to the first position, and the trigger on it gradually detaches from the air volume regulating plate. The air volume regulating plate turns into a vertical state under the action of gravity, and the overlapping area of ​​its wind-blocking section and the fire-arresting plate increases, and the hood collects cooling flue gas with a smaller air volume; at the same time, the pouring machine moves to the next pouring station.

2. The method for collecting pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The outlet ends of the hoods are all connected to the main exhaust pipe via exhaust branch pipes. Each exhaust branch pipe is equipped with a fire damper, and the main exhaust pipe is connected to the purification system.

3. The method for capturing pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The casting machine of the automatic casting line is set on the longitudinal track on the other side of the casting station.

4. The method for collecting pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The fire-resistant plate has a zigzag or wavy structure, and the fire-resistant plate is connected to the cover by a snap-fit ​​connection.

5. The method for capturing pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The air volume regulating plate is a bent plate with an angle between the trigger section and the wind-blocking section. The trigger section extends obliquely upward towards the pouring station. The height of the wind-blocking section is less than the height of the fire-resistant plate. The connection between the trigger section and the wind-blocking section is hinged to the top plate of the cover.

6. The method for capturing pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The smoke baffle is connected to the top plate of the hood via a sliding guide rail, and a drive mechanism for connecting the smoke baffle is provided on the top plate of the hood. A sensor for detecting the position of the pouring machine is provided near the pouring station. The signal output terminal of the sensor is electrically connected to the signal input terminal of the control center, and the control output terminal of the control center is electrically connected to the control input terminal of the drive mechanism.

7. The method for collecting pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: The trigger is a convex plate located at the bottom of the smoke baffle, with the lower edge of the convex plate lower than the upper edge of the trigger section of the airflow regulating plate.

8. The method for collecting pouring flue gas and cooling flue gas in an automatic pouring line according to claim 1, characterized in that: An elastic sealing element is provided between the cover and the smoke baffle.

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