Hot box core shooter operator station fume capture method

Abstract

The application discloses a kind of hot core box core shooting machine operating platform flue gas trapping methods, by flue gas trapping device is realized, when needing to extract smoke, start axial flow fan, under the action of thermal pressure, part of high-temperature harmful gas that rises to the trapping cover is sent into main ventilation system by first exhaust port, another part is sent into axial flow fan by second exhaust port, the attached jet with entrainment effect is formed in the inside of trapping cover, further trapping high-temperature harmful flue gas that floats to the trapping cover under the action of buoyancy force;When needing to replace sand core mold, adjust turnover cover to vertical state, and make telescopic cover slide into turnover cover;After sand core mold is replaced, make turnover cover restore to horizontal state, and telescopic cover is stretched out of turnover cover under the action of wind pressure and gravity of axial flow fan.The application can significantly improve the trapping effect of harmful gas, improve the working environment of workshop, with good green low-carbon effect, and the social benefit, environmental benefit and economic benefit are obvious.

Description

Technical Field

[0001] This invention relates to the field of flue gas capture technology, and in particular to a method for capturing flue gas on the operating table of a hot core box core shooter. Background Technology

[0002] Hot-box core shooting machines are key equipment in foundries for mass production of casting sand cores. During sand core production, a heated curing agent binds to the molding sand, forming the desired shape within the mold. When the sand core is ejected from the mold, its temperature is around 200°C, requiring trimming on a worktable. This sand core ejection and trimming process generates high-temperature waste gas containing VOCs and particulate matter. If this waste gas is not captured and treated to meet standards, it will pollute both the workshop's operating environment and the outdoor environment, failing to meet occupational health and environmental standards. Furthermore, due to the high ambient temperature in the workshop, cooling measures such as top-down ventilation are used. However, this ventilation method further disperses and diffuses the harmful waste gas generated by the sand cores on the worktable into the workshop, exacerbating air pollution. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a method for collecting flue gas from the operating table of a hot core ejector machine, specifically employing the following technical solution:

[0004] The flue gas capture method for the operating table of the hot core box core shooter described in this invention is achieved through a flue gas capture device.

[0005] The flue gas capture device includes:

[0006] The flue gas capture unit is located above the control panel and includes...

[0007] The trapping hood consists of a fixed hood, a flipping hood, and a telescopic hood connected in sequence. The rear end of the fixed hood is connected to the frame, the front end of the fixed hood is hinged to the rear end of the flipping hood, and a flipping drive mechanism is provided between the fixed hood and the flipping hood. The telescopic hood is slidably connected to the flipping hood.

[0008] The smoke extraction assembly includes a first exhaust vent and a second exhaust vent disposed on a fixed cover. The first exhaust vent is connected to the main ventilation system via a duct, and the second exhaust vent is connected to the air inlet of an axial flow fan. The air outlet of the axial flow fan is connected to a flexible duct. The end of the flexible duct extends to the front end of the telescopic cover, and the air outlet of the flexible duct is opposite to the fixed cover, for forming an adhering jet along the inner surface of the telescopic cover and the flip cover.

[0009] The air supply unit is located below the control panel surface, including...

[0010] An air chamber is provided, and an air filter is provided inside the air chamber. The air filter divides the air chamber into a front chamber and a rear chamber. A blower is provided on the side wall of the front chamber, and a louvered air outlet is provided on the side wall of the rear chamber.

[0011] The flue gas capture method includes:

[0012] When demolding and trimming sand cores on the operating table, the blower is activated to deliver air to both sides of the operating table through the louvered air outlets for cooling. Simultaneously, the axial flow fan is activated, connecting the fixed hood, tilting hood, and telescopic hood in sequence and arranging them horizontally. Under thermal pressure, some of the high-temperature harmful gases rising into the collection hood are sent to the main ventilation system through the first exhaust vent for purification and compliant discharge. The remaining portion is sent to the axial flow fan through the second exhaust vent and then through a flexible duct to the air outlet at the front of the telescopic hood, forming a [specific airflow pattern] inside the collection hood. The adhering jet with a suction effect further captures the high-temperature harmful flue gas that rises to the capture hood under the action of buoyancy, preventing it from escaping from the capture hood; when it is necessary to replace the sand core mold, the flipping drive mechanism makes the flipping hood flip towards the fixed hood side and into a vertical state. At this time, the telescopic hood slides into the flipping hood under the action of gravity, and then the sand core mold is replaced; after the sand core mold is replaced, the flipping drive mechanism makes the flipping hood return to the horizontal state, and the telescopic hood extends out of the flipping hood under the action of wind pressure from the axial flow fan and gravity.

[0013] The fixed cover and the flip cover are connected by a hinge between their top mating surfaces. The flipping drive mechanism is a hydraulic rod located above the fixed cover and the flip cover, with one end of the hydraulic rod connected to the fixed cover and the other end connected to the flip cover.

[0014] When the hydraulic rod is in the extended state, the flip cover and telescopic cover are tilted downwards at a rate of 1° to 3° along the horizontal direction.

[0015] The telescopic cover is fitted inside the flip cover, and a sliding guide rail is provided between the telescopic cover and the flip cover. A buffer and shock-absorbing pad is provided at the front end of the flip cover.

[0016] The axial flow fan is mounted on top of the fixed cover, and the flexible air duct extends forward along the top of the flip cover and the telescopic cover and is connected to the air outlet fixedly mounted at the front end of the telescopic cover.

[0017] The air supply fan is installed on the front side wall of the front cavity.

[0018] The louvered air outlets are located on the left and right side walls of the rear cavity, and the air outlets are set at an upward angle of 30° to 60°.

[0019] The air blades of the louvered air outlet are connected to the rear cavity via a rotating shaft.

[0020] The present invention provides a method for capturing flue gas from the operating table of a hot core box core shooting machine, which combines cooling and exhaust. By rationally designing the cooling and air supply mechanism of the operating table, it avoids exacerbating the diffusion of harmful gases in the workshop. Simultaneously, a capture hood is installed above the operating table to capture the high-temperature harmful gases generated during core demolding and finishing. A portion of the extracted flue gas is sent to an axial flow fan, which not only reduces the flow load on the main ventilation system but also creates a jet stream attached to the top of the hood to enhance the gas capture effect. The flue gas capture device used in this invention has a simple structure and low cost, significantly improving the capture effect of harmful gases, improving the working environment of the workshop, and exhibiting good green and low-carbon effects. Its social, environmental, and economic benefits are significant. Furthermore, compared with existing capture devices, the capture device of this invention can be seamlessly integrated with the existing main ventilation system, meeting ventilation and purification requirements. It requires fewer modification projects and has low investment costs, making it very suitable for the renovation of existing workshops. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the flue gas collection device described in this invention.

[0022] Figure 2 yes Figure 1 Top view.

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure when the trapping hood is flipped.

[0024] Figure 4 yes Figure 1 AA section view.

[0025] Figure 5 This is a simulation diagram of the effect of the fume hood in the present invention for capturing flue gas (side view).

[0026] Figure 6 This is a simulation diagram of the combined operation (front view) of the trapping hood and the air supply unit in this invention. Detailed Implementation

[0027] 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 construction processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0028] The flue gas capture method for the operating table of the hot core box core shooter described in this invention is achieved through a flue gas capture device.

[0029] The flue gas collection device consists of a flue gas collection unit and an air supply unit.

[0030] Specifically, such as Figure 1-4As shown, the smoke collection unit is located above the operating table M and includes a collection hood and a smoke extraction assembly. The collection hood consists of a fixed hood 1, a flip hood 2, and a telescopic hood 3 connected in sequence. The top surface of the fixed hood 1 is a rectangular structure, and the left and right sides are right-angled trapezoidal structures of the same size, with a smaller front end and a larger rear end. The rear end is fixed to the frame N by bolts or the like. The flip hood 2 is set at the front end of the fixed hood 1. The flip hood 2 has an inverted U-shaped structure, and the two are connected together by a hinge at the top joint surface. When smoke extraction is performed, the flip hood 2 is set horizontally; when changing the sand core mold, the flip hood 2 flips to the side of the fixed hood 1 and is in a vertical state to make way for the mold.

[0031] To enable the tilting cover 2 to tilt automatically, a hydraulic rod 4 (i.e., a tilting drive mechanism) is installed above the fixed cover 1 and the tilting cover 2. One end of the hydraulic rod 4 is connected to the fixed cover 1, and the other end is connected to the tilting cover 2. When the hydraulic rod 4 extends, the tilting cover 2 is positioned horizontally; when the hydraulic rod 4 retracts, the tilting cover 2 is pulled to a vertical position. An inverted U-shaped telescopic cover 3 is fitted inside the tilting cover 2, and the two are connected by a sliding guide rail 5. When the trapping cover is in the smoke extraction state, the telescopic cover 3 extends out of the front end of the tilting cover 2, and both are positioned horizontally; when the sand core mold is changed, the tilting cover 2 is in a vertical position, and at this time, the telescopic cover 3 slides into the tilting cover 2 under the action of gravity. To prevent the telescopic cover 3 from falling and colliding with the tilting cover 2 and causing damage, a buffer shock-absorbing pad 6 is installed at the front end of the tilting cover 2.

[0032] The smoke extraction assembly includes a first exhaust vent 7 and a second exhaust vent installed on the fixed hood 1. The first exhaust vent 7 is connected to the main ventilation system through a duct, which introduces the extracted high-temperature harmful gas into the purification system for treatment and emission in compliance with standards. An axial flow fan 8 is installed on the top of the fixed hood 1. The second exhaust vent is connected to the air inlet of the axial flow fan 8. The air outlet of the axial flow fan 8 is connected to a flexible air duct 9. The flexible air duct 9 extends forward along the top of the flip-up hood 2 and the telescopic hood 3, and its end is connected to an air supply vent 10 fixed at the front end of the telescopic hood 3. The air supply vent 10 is opposite to the fixed hood and is used to form an attached jet along the inner surface of the telescopic hood 3 and the flip-up hood 2.

[0033] The aforementioned hydraulic rod 4 is arranged along the central axis of the fixed cover 1. The first exhaust vent 7 is located on one side of the hydraulic rod 4, and the second exhaust vent and axial flow fan 8 are located on the other side of the hydraulic rod 4. The flexible duct 9 is fixed at the two ends of the segment above the flip cover 2 by snap-fit. When the flip cover 2 is flipped into a vertical position, the telescopic cover 3 retracts into the flip cover 2, and the flexible duct 9 of the corresponding segment of the telescopic cover 3 is compressed accordingly. When the flip cover 2 returns to a horizontal position, the flexible duct 9 of the corresponding segment of the telescopic cover 3 unfolds under the air pressure of the axial flow fan 8, and the telescopic cover 3 extends out of the flip cover 2. Furthermore, when the flip cover 2 and the telescopic cover 3 are in a horizontal position, they are generally designed to be tilted downwards by 1° to 3° in the horizontal direction, so that the telescopic cover 3 can extend smoothly under the combined action of air pressure and gravity.

[0034] The air supply unit is located below the control panel M and includes an air chamber 11 containing an air filter 12. The air chamber 11 can be divided into a front chamber and a rear chamber. A blower 13 or fan coil unit is installed on the front wall of the front chamber, while louvered air outlets 14 are installed on the left and right side walls of the rear chamber. Normally, the louvered air outlets 14 are tilted upwards at a 30°–60° angle to provide the operator with the most comfortable temperature without affecting the smoke extraction of the fume hood. The air blades of the louvered air outlets are typically connected to the rear chamber via a rotating shaft, allowing manual adjustment of the airflow direction.

[0035] The flue gas capture method of the present invention includes:

[0036] When demolding and trimming the sand core on the operating table M, the blower 13 is started, and air is supplied to both sides of the operating table M through the louvered air outlets 14 for cooling. At the same time, the axial flow fan 8 is started, so that the fixed hood 1, the flip hood 2, and the telescopic hood 3 are connected in sequence and arranged horizontally. Under the action of thermal pressure, part of the high-temperature harmful gas rising into the capture hood is sent to the main ventilation system through the first exhaust outlet 7 for purification and emission in compliance with standards, and the other part is sent to the axial flow fan 8 through the second exhaust outlet, and then sent to the air outlet 10 at the front end of the telescopic hood 3 through the flexible air duct 9. This forms an adhering jet with a suction effect on the inner side of the capture hood, further capturing the rising high-temperature harmful smoke and preventing it from escaping from the capture hood, thus enhancing the capture effect (see capture effect). Figure 5 and Figure 6 When it is necessary to replace the sand core mold, the hydraulic rod 4 is used to flip the flip cover 2 to the side of the fixed cover 1 and make it vertical. At this time, the telescopic cover 3 slides into the flip cover 2 under the action of gravity, and then the sand core mold is replaced. After the sand core mold is replaced, the hydraulic rod 4 is used to restore the flip cover 2 to the horizontal state. The telescopic cover 3 extends out of the flip cover 2 under the action of wind pressure and gravity of the axial flow fan 8.

[0037] 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 hot box core shooter operating platform flue gas capturing method, realized by a flue gas capturing device, characterized in that: the flue gas capturing device comprises: a flue gas capturing unit arranged above the operating platform, comprising a capturing cover composed of a fixed cover, a turnover cover and an extension cover connected in sequence, the rear end of the fixed cover is connected with the machine frame, the front end of the fixed cover is hingedly connected with the rear end of the turnover cover, a turnover driving mechanism is arranged between the fixed cover and the turnover cover, and the extension cover is slidably connected with the turnover cover; an air extraction assembly comprising a first air outlet and a second air outlet arranged on the fixed cover, the first air outlet is connected with the main ventilation system through a pipeline, the second air outlet is connected with the air inlet of an axial flow fan, the air outlet of the axial flow fan is connected with a flexible air duct, the tail end of the flexible air duct extends to the front end of the extension cover, and the air supply port of the flexible air duct is opposite to the fixed cover for forming an attached jet flow along the inner surfaces of the extension cover and the turnover cover; an air supply unit arranged below the operating platform table top, comprising an air cavity, an air filter element is arranged in the air cavity, the air filter element divides the air cavity into a front cavity and a rear cavity, a side wall of the front cavity is provided with an air supply fan, and a side wall of the rear cavity is provided with a louvered air supply port; and the flue gas capturing method comprises: when sand core stripping and sand core trimming are performed on the operating platform, the air supply fan is started to supply air to both sides of the operating platform through the louvered air supply port for cooling; at the same time, the axial flow fan is started to make the fixed cover, the turnover cover and the extension cover connected in sequence and arranged horizontally, and under the action of thermal pressure, part of the high-temperature harmful gas in the capturing cover rises to be purified and discharged in accordance with the standard by being sent into the main ventilation system through the first air outlet, and the other part is sent into the axial flow fan through the second air outlet, and further captured by the attached jet flow with a suction effect formed on the inner side of the capturing cover to prevent the high-temperature harmful flue gas floating to the capturing cover under the action of buoyancy from escaping out of the capturing cover; when it is necessary to replace the sand core mold, the turnover cover is turned over to the side of the fixed cover and arranged vertically by the turnover driving mechanism, at this time, the extension cover slides into the turnover cover under the action of gravity, and then the sand core mold is replaced; after the sand core mold replacement is completed, the turnover cover is restored to the horizontal state by the turnover driving mechanism, and the extension cover extends out of the turnover cover under the action of the air pressure of the axial flow fan and the action of gravity. The fixed cover and the turnover cover are connected by a hinge arranged between the top joint surfaces of the two, the turnover driving mechanism is a hydraulic rod arranged above the fixed cover and the turnover cover, one end of the hydraulic rod is connected with the fixed cover, and the other end of the hydraulic rod is connected with the turnover cover. When the hydraulic rod is in an extended state, the turnover cover and the extension cover are arranged to be inclined downward by 1°-3° along the horizontal direction. The extension cover is sleeved on the inner side of the turnover cover, a sliding guide rail is arranged between the extension cover and the turnover cover, and a buffer damping gasket is arranged at the front end of the turnover cover. The axial flow fan is arranged on the top of the fixed cover, the flexible air duct extends forward along the top of the turnover cover and the extension cover and is connected with the air supply port fixedly arranged at the front end of the extension cover. The air supply fan is arranged on the front side wall of the front cavity. ​ ​ ​ 2. The hot box jack-ing plant fume capture method of claim 1, wherein: ​ 3. The hot box jack-ing plant fume capture method of claim 2, wherein: ​ 4. The hot box jack-ing plant fume capture method of claim 3, wherein: ​ 5. The hot box jack-ing plant fume capture method of claim 4, wherein: ​ 6. The hot box jack house operating pit fume capture method of claim 5, wherein: ​ 7. The hot box jack-ing plant fume capture method of claim 6, wherein: The louvered air supply outlet is arranged on the left and right side walls of the rear cavity, and the air outlet direction of the louvered air supply outlet is arranged at an angle of 30°-60° upward.

8. The hot box jack house operating pit fume capture method of claim 7, wherein: The air leaf of the louvered air supply outlet is connected with the rear cavity through a rotating shaft.

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