A hot stamping exhaust gas collection system

Abstract

This utility model provides a hot stamping exhaust gas collection system, belonging to the field of environmental protection equipment technology. It includes an annular gas collection hood, an extension hood, a suction pipe assembly, and an induced draft fan. The annular gas collection hood forms an annular gas collection chamber inside, with a suction port at the bottom for collecting exhaust gas. The extension hood connects to the bottom of the annular gas collection hood at its upper end and is positioned near the upper end of the stamping equipment at its lower end. The extension hood covers the stamping equipment to collect exhaust gas generated during the stamping operation. One end of the suction pipe assembly is connected to the annular gas collection chamber. Exhaust gas passes sequentially through the extension hood, the suction port, and the annular gas collection chamber before entering the suction pipe assembly. The induced draft fan is connected to the other end of the suction pipe assembly and is used to draw in the exhaust gas and transport it to exhaust gas treatment equipment. This hot stamping exhaust gas collection system, by adding an extension hood, extends to the upper end of the equipment, maximizing the absorption of exhaust gas, reducing exhaust gas overflow or leakage, and avoiding environmental pollution and safety accidents.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, and more specifically, it relates to a hot stamping exhaust gas collection system. Background Technology

[0002] In the casting industry, hot stamping is a common metal processing method widely used in the automotive, electronics, and home appliance industries. However, during the stamping process, the high temperature and high pressure deformation of the material and the volatilization of lubricants generate a certain amount of waste gas. This waste gas not only pollutes the environment but may also adversely affect the health of workers. The waste gas generated in hot stamping processes or other processes involving high-temperature waste gas mainly includes volatile organic compounds (VOCs) and dust. To avoid pollution and improve the production environment, it is necessary to collect and clean the generated waste gas.

[0003] In the hot stamping process of the workshop, exhaust gases are collected by a hood in the exhaust gas collection system located above the hot stamping process. The collected exhaust gases are then treated using technologies such as activated carbon adsorption, catalytic combustion, and biological filtration to reduce pollutant concentrations. However, because robotic arms or other equipment are often installed on one side of the equipment used in the hot stamping process (stamping equipment), and these robotic arms or other equipment often need to operate during hot stamping, the height of the hood cannot be too low to avoid interfering with the operation of the robotic arms or other equipment. If the hood is set too high, only a small portion of the exhaust gas is collected, resulting in poor collection efficiency and uneven collection, leading to high-temperature exhaust gas overflow and causing high ambient temperature and poor air quality in the workshop. After prolonged use, oily substances such as lubricants used in the hot stamping process adhere to the inner walls of the hood and ductwork, posing a risk of spontaneous combustion at high temperatures. Therefore, it is necessary to improve the current exhaust gas collection system to collect almost all exhaust gases, reduce overflow or leakage, and avoid environmental pollution and safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a hot stamping exhaust gas collection system, which aims to solve the technical problem that the exhaust gas collection system used in the hot stamping process only collects a small portion of the exhaust gas due to the high height of the gas collection hood, resulting in exhaust gas overflow and environmental pollution.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a hot stamping exhaust gas collection system, comprising: An annular gas collection hood is connected above the stamping equipment. An annular gas collection chamber is formed inside the annular gas collection hood. The bottom of the annular gas collection chamber has a suction port. The suction port faces the stamping equipment and is used to collect exhaust gas, allowing the exhaust gas to enter the annular gas collection chamber. An extension hood is connected to the lower end of the annular gas collection hood. Its upper end is connected to the bottom end of the annular gas collection hood, and its lower end is set near the upper end of the stamping equipment and avoids the robot or other equipment. The extension hood is set above the stamping equipment to collect the exhaust gas generated during the stamping operation. The suction pipe assembly is connected at one end to the annular air collection chamber. Exhaust gas passes sequentially through the inside of the extended cover, the suction port, and the annular air collection chamber before entering the suction pipe assembly. An exhaust fan has an exhaust end connected to the other end of the exhaust pipe assembly. The exhaust fan is used to draw in the exhaust gas inside the exhaust pipe assembly and transport it to the exhaust gas treatment equipment.

[0006] In one possible implementation, the extended hood includes multiple plates that are fixedly connected to the bottom end of the side wall of the annular gas collecting hood, with adjacent plates fixedly connected to each other. The height of the plates extends along the height of the annular gas collecting hood, and the multiple plates form a channel suitable for the passage of exhaust gas.

[0007] In one possible implementation, multiple plates are arranged in a closed or semi-closed structure in a horizontal plane.

[0008] In one possible implementation, the annular gas collecting hood has a regular cross-sectional shape, and a groove is formed on the top of the annular gas collecting hood that is recessed inward. A platform is installed above the stamping equipment, and the lower part of the platform is placed in the groove and fixedly connected.

[0009] In one possible implementation, a sealing plate is connected between the bottom end of the recess and the bottom end of the side wall of the annular air collection hood. The sealing plate is arranged around the recess and has multiple air intakes arranged in a regular shape. The annular air collection chamber is a ring-shaped chamber formed around the recess.

[0010] In one possible implementation, the diameter of the plurality of air inlets gradually increases from the end near the air inlet assembly to the end away from the air inlet assembly.

[0011] In one possible implementation, the air intake assembly includes: The main suction pipe is connected at one end to the suction end of the induced draft fan and closed at the other end. A branch pipe for air intake, one end of which is connected to the side of the main pipe for air intake, and the inner diameter of the branch pipe for air intake is smaller than the inner diameter of the main pipe for air intake. The triangular suction pipe is arranged in a triangular shape, with the larger diameter end connected to the annular air collection chamber and the smaller diameter end connected to the other end of the suction pipe branch pipe. The exhaust gas passes sequentially through the triangular suction pipe, the branch pipe of the suction pipe, and the main pipe of the suction pipe before entering the induced draft fan.

[0012] In one possible implementation, the suction pipe branch is connected to an electrically adjustable air valve, which is adapted to adjust the gas flow rate inside the suction pipe branch.

[0013] In one possible implementation, the air intake branch pipe is connected to a fireproof damper, which has a built-in temperature sensing element. When the internal temperature of the air intake branch pipe reaches 70°C, the fireproof damper is used to block the air intake branch pipe.

[0014] In one possible implementation, the suction pipe branch is connected to a pressure sensor, which is adapted to monitor the gas pressure inside the suction pipe branch in real time.

[0015] The beneficial effects of the hot stamping exhaust gas collection system provided by this utility model are as follows: Compared with the prior art, the hot stamping exhaust gas collection system of this utility model includes an annular gas collection hood, an extension hood, a suction pipe assembly, and an induced draft fan. An annular gas collection chamber is formed inside the annular gas collection hood, and a suction port is provided at the bottom of the annular gas collection chamber. The suction port faces the stamping equipment and is used to collect exhaust gas. The upper end of the extension hood is connected to the bottom end of the annular gas collection hood, and the lower end is close to the upper end of the stamping equipment. The extension hood is installed above the stamping equipment to collect the exhaust gas generated during the stamping operation. One end of the suction pipe assembly is connected to the annular gas collection chamber. The exhaust gas passes through the inside of the extension hood, the suction port, and the annular gas collection chamber in sequence before entering the suction pipe assembly. The induced draft fan is connected to the other end of the suction pipe assembly and is used to draw in the exhaust gas in the suction pipe assembly and transport it to the exhaust gas treatment equipment. By adding an extension hood at the lower end of the annular gas collection hood, it can extend to the upper end of the equipment, maximizing the absorption of exhaust gas, reducing exhaust gas overflow or leakage, and avoiding environmental pollution and safety accidents. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0017] Figure 1 A schematic diagram of a hot stamping exhaust gas collection system provided in an embodiment of this utility model; Figure 2 A top view of the annular gas collection hood of a hot stamping exhaust gas collection system provided in this embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view of the annular gas collection hood along the AA direction; Figure 4A schematic diagram of the usage state structure of a hot stamping exhaust gas collection system provided in an embodiment of this utility model; Figure 5 for Figure 3 A cross-sectional view of the annular gas collection hood provided in another embodiment; Figure 6 for Figure 3 A cross-sectional view of the annular gas collection hood provided in another embodiment.

[0018] Explanation of reference numerals in the attached figures: 1. Annular air collection hood; 11. Annular air collection chamber; 12. Air intake; 13. Groove; 14. Sealing plate; 2. Extension cover; 21. Plate body; 3. Air intake pipe assembly; 31. Main air intake pipe; 32. Branch air intake pipe; 33. Triangular air intake pipe; 4. Stamping equipment; 5. Platform; 6. Electric regulating air valve; 7. Fireproof gate; 8. Pressure sensor; 9. Fan; 10. Slide rail. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model. Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In existing technology, during the hot stamping process of workpieces in a hot stamping workshop, waste gas is generated. This waste gas causes environmental pollution and affects the health of workers, thus requiring collection and treatment. Currently, the common method for waste gas collection is to first collect the waste gas using a fume hood, followed by treatment. Existing fume hoods are generally inverted funnel-shaped, with a wide opening at the bottom and an upper end for connecting to a waste gas pipe. The lower end covers the stamping equipment 4 to collect the generated waste gas, and the suction generated by the collection device absorbs the waste gas. However, since robotic arms or other equipment are installed on the side of the stamping equipment 4, and the typical fume hood is located at the top of the workshop, its height is relatively high. Furthermore, it cannot come into contact with the stamping equipment 4, robotic arms, or other equipment. Therefore, for such a high fume hood, only a small portion of the waste gas is sucked away during its ascent, while most of the waste gas overflows outside the fume hood and disperses into the workshop, causing environmental pollution.

[0022] Therefore, it is necessary to improve the existing gas collection hood so that it can collect almost all of the exhaust gas, minimizing the overflow of exhaust gas and environmental pollution. In this utility model, the existing gas collection hood is improved by adding an extension hood 2 at the lower end of the gas collection hood, which can extend the height of the gas collection hood downward. The extension hood 2 is placed above the stamping equipment 4 (as close as possible to the stamping equipment 4 or other equipment), without affecting the normal use of the robot or other equipment. By reasonably setting the extension hood 2, almost all the exhaust gas can enter the interior of the extension hood 2, thus minimizing the overflow of exhaust gas and environmental pollution.

[0023] Please refer to the following: Figures 1 to 3 The present invention provides a hot stamping exhaust gas collection system. The hot stamping exhaust gas collection system includes an annular gas collection hood 1, an extension hood 2, a suction pipe assembly 3, and an induced draft fan (not shown in the figure). The annular gas collection hood 1 is connected above the stamping equipment 4, and an annular gas collection chamber 11 is formed inside the annular gas collection hood 1. The bottom of the annular gas collection chamber 11 has a suction port 12, which faces the stamping equipment 4 and is used to collect exhaust gas, allowing the exhaust gas to enter the annular gas collection chamber 11. The extension hood 2 is connected to the lower end of the annular gas collection hood 1, and its upper end is connected to the annular gas collection hood. The bottom and lower ends are located near the upper end of the stamping equipment 4 and avoid the robot or other equipment. The extension cover 2 is placed above the stamping equipment 4 to collect the exhaust gas generated during the stamping operation. One end of the suction pipe assembly 3 is connected to the annular gas collection chamber 11. The exhaust gas passes through the inside of the extension cover 2, the suction port 12, and the annular gas collection chamber 11 in sequence before entering the suction pipe assembly 3. The induced draft fan has a suction end connected to the other end of the suction pipe assembly 3. The induced draft fan is used to draw in the exhaust gas in the suction pipe assembly 3 and transport it to the exhaust gas treatment equipment.

[0024] A hot stamping waste gas collection system provided by the utility model, compared with the prior art, forms an annular air hood 1 by improving the existing air hood, and a prolonging hood 2 is added at the lower end of the annular air hood 1, so that the prolonging hood 2 extends to the upper end of the equipment to the maximum extent, absorbs waste gas to the greatest extent, reduces the overflow or leakage of waste gas, and avoids environmental pollution and safety accidents.

[0025] When specifically setting, according to the installation height of the annular air hood 1, the height or distance between the annular air hood 1 and the stamping equipment 4, the height of the prolonging hood 2 is reasonably set, so that the upper end of the prolonging hood 2 is fixedly connected to the bottom end of the side wall of the annular air hood 1. Usually, the height of the prolonging hood 2 is greater than the height of the annular air hood 1. Then the prolonging hood 2 is a structure with both the upper end and the lower end open. The lower end opening is sleeved above the stamping equipment 4 and does not affect the position of the manipulator or other equipment, and can collect the waste gas generated during the stamping process and avoid overflow and leakage. The shape of the prolonging hood 2 can be set in cooperation with the shape of the annular air hood 1. In this embodiment, the shape of the annular air hood 1 is rectangular parallelepiped, the air suction pipe assembly 3 is communicated with the side part of the annular air hood 1, the upper end of the air suction pipe assembly 3 is flush with the upper end of the annular air hood 1, and the cross section of the annular air hood 1 in the horizontal plane is rectangular, as Figure 2 shown, then the prolonging hood 2 is also rectangular parallelepiped, the upper end is connected to the lower end of the annular air hood 1, the lower end is closest to the stamping equipment 4 or the manipulator or other equipment to the maximum extent, and they do not affect each other in use.

[0026] In some embodiments, please refer to Figures 1 to 3 , the prolonging hood 2 includes multiple plate bodies 21 respectively fixedly connected to the bottom end of the side wall of the annular air hood 1. Adjacent two plate bodies 21 are fixedly connected, and the height direction of the plate body 21 extends along the height direction of the annular air hood 1. The multiple plate bodies 21 enclose a channel suitable for waste gas to pass through. When the annular air hood 1 is rectangular parallelepiped, the prolonging hood 2 is four plate bodies 21, and the four plate bodies 2, enclose a rectangular cylindrical structure. The plate bodies 21 are arranged vertically, the upper end is fixedly connected to the lower end of the annular air hood 1, and the side wall of the plate body 21 is flush or coplanar with the side wall of the annular air hood 1. The prolonging hood 2 can be regarded as an extension of the annular air hood 1 along its height direction. The plate bodies 21 can be welded to each other, and the plate bodies 21 and the annular air hood 1 can also be welded to each other to form a whole by fixing connection. The waste gas first enters the inside of the prolonging hood 2 and then enters the inside of the annular air hood 1. Usually, if four plate bodies 21 are set, it can enclose a "square" shape in the horizontal plane to form a closed structure.

[0027] In special cases, if a robotic arm or other equipment is installed on one side of the stamping equipment 4, in order not to affect the normal operation of the robotic arm or other equipment, a plate 21 is installed on each side of the stamping equipment 4 where the robotic arm or other equipment is installed. That is, one less plate 21 is installed on the side of the stamping equipment 4 where the robotic arm or other equipment is installed, that is, only three plates 21 are installed, forming a U or C shape in the horizontal plane to form a semi-enclosed structure. When installing the plates 21, it is necessary to consider whether the plates 21 will affect the normal operation of the robotic arm or other equipment. If there is an impact, one less plate 21 should be installed or the height of the installed plates 21 should be reduced, so that the plates 21 do not affect the stamping operation, the operation of the robotic arm or other equipment, while ensuring that the generated exhaust gas can be collected to the maximum extent.

[0028] In some embodiments, please refer to Figures 1 to 3 Multiple plates 21 form a closed or semi-closed structure in the horizontal plane. Figures 1 to 3 The four plates 21 form a closed structure, that is, the four plates 21 form a closed rectangular structure in the horizontal plane, and the four plates 21 are fixedly connected to each other end to end. However, when the above special case exists, if three plates 21 are used, a semi-closed structure is formed, that is, one less plate 21 is set, and one side of the extension cover 2 is open. Alternatively, on the side of the stamping equipment 4 where the robot or other equipment is set, the length of the plate 21 is shorter than the length of the other plates 21, and it does not affect the use of other equipment, then a semi-closed structure can also be formed.

[0029] In summary, when specifically setting up the aforementioned multiple plates 21, the height of the plates 21 should be reasonably set without affecting the operation of the equipment. In special cases, the four plates 21 can be set at different heights without affecting the collection of exhaust gas. Compared with the existing technology of only setting a gas collection hood at the top of the workshop to collect exhaust gas, this setting method in this embodiment can collect almost all the exhaust gas, minimize exhaust gas overflow and environmental pollution, and has a more obvious effect on exhaust gas collection.

[0030] In some embodiments, please refer to Figures 1 to 3The annular gas collecting hood 1 has a regular cross-sectional shape, and a recessed groove 13 is formed at the top of the annular gas collecting hood 1. A platform 5 is installed above the stamping equipment 4, and the lower part of the platform 5 is placed in the groove 13 and fixedly connected. In this embodiment, the annular gas collecting hood 1 is rectangular, but there are many regular shapes, and it can also be cylindrical. Since the stamping equipment 4 is rectangular, the shape of the annular gas collecting hood 1 matches the shape of the stamping equipment 4, so that the extension hood 2 can be fastened to the top of the stamping equipment 4, thereby maximizing the collection of exhaust gas. In order to fix the annular gas collecting hood 1, a platform 5 is usually installed on the top of the workshop. The platform 5 is rectangular, so the annular gas collecting hood 1 can be fixed on the platform 5, thereby achieving the fixation of the annular gas collecting hood 1. In this embodiment, the shape of the recess matches the shape of the platform 5. After the platform 5 is inserted into the groove 13, fasteners (such as bolts, screws, etc.) can be used to fix the annular gas collecting hood 1 and the platform 5. Fasteners are provided at the top of the inner side of the annular gas collection hood 1, that is, at the bottom of the recess. The fasteners pass through the bottom of the recess and are inserted and locked inside the platform 5, thereby fixing the annular gas collection hood 1.

[0031] In this embodiment, the depth of the groove 13 is approximately half the height of the annular gas collection hood 1.

[0032] In order to form a ring structure for the annular gas collecting cavity 11, please refer to some embodiments. Figures 1 to 3 A sealing plate 14 is connected between the bottom edge of the recess and the bottom edge of the side wall of the annular gas collection hood 1. The sealing plate 14 is arranged around the recess and has multiple air inlets 12. The multiple air inlets 12 are arranged in a regular shape. The annular gas collection cavity 11 is a ring-shaped chamber formed around the recess. The sealing plate 14 is set between the bottom edge of the recess and the bottom edge of the side wall of the annular gas collection hood 1. The sealing plate 14 and the annular gas collection hood 1 can form an annular gas collection cavity 11, so that the annular gas collection cavity 11 is arranged around the recess. There can be one or more sealing plates 14, arranged around the recess. Air inlets 12 are opened on the sealing plate 14 so that the exhaust gas enters the interior of the annular gas collection cavity 11 through the air inlets 12.

[0033] In some embodiments, please refer to Figure 2 The diameter of the multiple air inlets 12 gradually increases from the end closest to the air intake pipe assembly 3 to the end furthest from the air intake pipe assembly 3. The larger the diameter of the air inlet 12, the greater the air volume. Since the suction force is greater at the end closest to the air intake pipe assembly 3 and less at the end furthest from the air intake pipe assembly 3, the diameter of the air inlet 12 is reasonably set according to the suction force in order to enable the annular gas collection hood 1 to absorb almost all or all of the exhaust gas, thus achieving the collection of exhaust gas.

[0034] In this embodiment, the number of air intakes 12 is not limited.

[0035] In some embodiments, please refer to Figure 1 The suction pipe assembly 3 includes a main suction pipe 31, a branch suction pipe 32, and a triangular suction pipe 33. One end of the main suction pipe 31 is connected to the suction end of the induced draft fan, and the other end is closed. One end of the branch suction pipe 32 is connected to the side of the main suction pipe 31, and the inner diameter of the branch suction pipe 32 is smaller than the inner diameter of the main suction pipe 31. The triangular suction pipe 33 is triangular in shape, with the larger diameter end connected to the annular gas collection chamber 11 and the smaller diameter end connected to the other end of the branch suction pipe 32. The exhaust gas enters the induced draft fan after passing through the triangular suction pipe 33, the branch suction pipe 32, and the main suction pipe 31 in sequence. The main suction pipe 31 has a larger diameter and is called the "main pipe," while the branch suction pipes 32 have smaller diameters and are called "branch pipes" or "sub-pipes." Within the workshop, a reasonable number of branch suction pipes 32 can be set according to the number of stamping equipment 4 and the actual situation, ensuring that one end of each branch pipe 32 is connected to the main suction pipe 31. Multiple branch pipes 32 arranged side-by-side allow exhaust gas to flow into the main suction pipe 31, facilitating the collection of exhaust gas generated by multiple stamping equipment 4 within the workshop. The triangular suction pipe 33 is triangular in shape, with a large diameter at one end and a small diameter at the other. The side of the annular gas collection hood 1 is rectangular, allowing it to connect and connect with the larger diameter end of the triangular suction pipe 33, thus collecting exhaust gas discharged from the annular gas collection chamber 11. The smaller diameter end connects and connects with one end of the branch suction pipe 32, enabling the flow of exhaust gas.

[0036] Among them, the triangular suction pipe 33 is an exhaust pipe with a triangular cross-section, which is existing technology. Its function is to reduce wind resistance and facilitate the transport of exhaust gas. One end of the exhaust pipe is actually rectangular in shape and is used to connect and dock with the side of the annular gas collection hood 1; while the other end is circular and is used to connect and dock with the suction pipe branch pipe 32.

[0037] To achieve adjustment of the exhaust gas flow rate, please refer to the following embodiments in some cases. Figure 2 The suction pipe branch pipe 32 is connected to an electrically adjustable damper 6, which is suitable for adjusting the gas flow rate inside the suction pipe branch pipe 32. This electrically adjustable damper 6 is existing technology and is located in a position slightly off-center from the middle of the suction pipe branch pipe 32. The flow rate of the exhaust gas can be adjusted by adjusting the electrically adjustable damper 6.

[0038] Specifically, the intake pipe branch 32 can be split into two sections in the middle. An electrically adjustable damper 6 is installed between the two sections of the intake pipe branch 32 and connected to both sections to form a gas flow channel. The exhaust gas flow rate can be controlled by the electrically adjustable damper 6.

[0039] To achieve fire prevention, the intake duct branch pipe 32 can be sealed off promptly in the event of a fire. In some embodiments, please refer to... Figure 2The exhaust duct branch pipe 32 is connected to a fire damper 7. The fire damper 7 has a built-in temperature sensing element. When the internal temperature of the exhaust duct branch pipe 32 reaches 70℃, the fire damper 7 is used to block the exhaust duct branch pipe 32. The fire damper 7 can block the fire in time, prevent the fire from spreading, and avoid causing greater hidden dangers.

[0040] Fire dampers (also known as pipeline fire dampers or fire gate valves) are key components in fire protection systems for industrial and civil buildings. Their core function is to block the spread of flames, high-temperature smoke, and flammable media within the pipeline, preventing fire from spreading through the pipeline and thus curbing its spread, protecting personnel safety, and reducing property damage. They block the "pipeline fire path," preventing flame propagation and the spread of high-temperature smoke. Fire dampers have an automatic triggering function; most have built-in temperature-sensing elements (such as fusible alloy sheets that melt at 70℃ / 280℃) or smoke detectors, automatically closing in the early stages of a fire without manual operation, preventing failure due to delays in evacuation.

[0041] To achieve real-time monitoring of the exhaust gas pressure inside the intake duct branch pipe 32, in some embodiments, please refer to... Figure 2 The suction pipe branch pipe 32 is connected to a pressure sensor 8, which is suitable for real-time monitoring of the gas pressure inside the suction pipe branch pipe 32. The monitoring end of the pressure sensor 8 is inserted into the suction pipe branch pipe 32 to monitor the pressure of the exhaust gas. The pressure sensor 8 and the suction pipe branch pipe 32 are sealed together to prevent exhaust gas leakage. The pressure sensor 8 can be a PT type pressure sensor. Figure 1 The pressure sensor 8 and the electrically adjustable damper 6 are both electrically connected to the external control center. The pressure sensor 8 can send data to the control center, and the opening of the electrically adjustable damper 6 can be adjusted based on the data, ultimately achieving balanced air volume collection when all sets of equipment are connected in parallel. During normal operation, if the data of the pressure sensor 8 fluctuates abnormally, it can promptly prompt maintenance of the exhaust gas collection system. If the problem of spontaneous combustion of oil stains adhering to the inner wall of the annular gas collection hood 1 and the suction pipe assembly 3 is encountered, the fireproof gate 7 can automatically seal it, cut off the suction pipe branch 32, and simultaneously shut down the induced draft fan.

[0042] In some embodiments, please refer to Figure 4 In the diagram, the dotted line at the bottom represents the hot stamping equipment or stamping equipment 4. With the extension hood 2 positioned above the hot stamping equipment 4, close to the upper part of the equipment, the exhaust gas generated during the stamping operation can be collected by the extension hood 2, thus achieving exhaust gas collection. The height of the extension hood 2 can be reasonably set according to the actual situation.

[0043] In some embodiments, please refer to Figure 5To increase the efficiency of waste gas collection and prevent waste gas overflow, at least one set of fans 9 is installed on the inner wall of the extended hood 2. The suction end of the fans 9 faces downward and the exhaust end faces upward towards the air inlet 12. When the fans 9 are running, they can actively draw in waste gas and discharge it towards the air inlet 12, thereby actively drawing the waste gas into the annular gas collection chamber 11. This achieves active collection of waste gas, improves the collection efficiency, and effectively prevents waste gas overflow and leakage. In this embodiment, two sets of fans 9 are installed on the inner wall of the extended hood 2. The arrows indicate the flow direction of the waste gas.

[0044] Please see Figure 6 Preferably, a slide rail 10 or slide path is provided on the inner wall of the extension hood 2 along its height direction. The fan 9 is slidably connected to the slide rail 10 and can slide vertically to adjust the distance between the fan 9 and the bottom end of the extension hood 2, thereby enabling the fan 9 to actively draw in exhaust gas and adjust the speed and efficiency of exhaust gas absorption. Bolts are provided on the fan 9, which can abut or lock against the slide rail 10. After the fan 9 slides and its position is adjusted, the bolts can be used to fix the fan 9 to the slide rail 10, thus limiting the position of the fan 9. Typically, the fan 9 is positioned near the lower end of the extension hood 2, a position that maximizes exhaust gas absorption, prevents exhaust gas overflow, and ensures that all exhaust gas is collected inside the annular gas collection chamber 11.

[0045] This utility model has a simple and beautiful appearance, and ensures uniform air intake around the annular gas collection hood 1. It solves the problems of high-temperature exhaust gas overflow caused by the lack of a favorable installation position for the gas collection hood on the top of the equipment during the production process, as well as the uneven air intake when multiple devices are working at the same time. It can also ensure timely prevention of fire spread after accidental spontaneous combustion, effectively improve the working environment in the workshop, and has extremely high promotion and application value.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot stamping exhaust gas collection system, characterized in that, include: An annular gas collection hood is connected above the stamping equipment. An annular gas collection chamber is formed inside the annular gas collection hood. The bottom of the annular gas collection chamber has a suction port. The suction port faces the stamping equipment and is used to collect exhaust gas, allowing the exhaust gas to enter the annular gas collection chamber. An extension hood is connected to the lower end of the annular gas collection hood. Its upper end is connected to the bottom end of the annular gas collection hood, and its lower end is set near the upper end of the stamping equipment and avoids the robot or other equipment. The extension hood is set above the stamping equipment to collect the exhaust gas generated during the stamping operation. The suction pipe assembly is connected to the annular air collection chamber at one end. The exhaust gas passes through the inside of the extended cover, the suction port, and the annular air collection chamber in sequence before entering the suction pipe assembly. An exhaust fan has an exhaust end connected to the other end of the exhaust pipe assembly. The exhaust fan is used to draw in the exhaust gas inside the exhaust pipe assembly and transport it to the exhaust gas treatment equipment.

2. The hot stamping exhaust gas collection system as described in claim 1, characterized in that, The extended hood includes multiple plates that are fixedly connected to the bottom of the side wall of the annular gas collecting hood. Adjacent plates are fixedly connected to each other. The height of the plates extends along the height of the annular gas collecting hood, and the multiple plates form a channel suitable for the passage of exhaust gas.

3. The hot stamping exhaust gas collection system as described in claim 2, characterized in that, The multiple plates are arranged in a closed or semi-closed structure in the horizontal plane.

4. The hot stamping exhaust gas collection system as described in claim 1, characterized in that, The annular gas collecting hood has a regular cross-sectional shape, and a groove is formed on the top of the annular gas collecting hood that is recessed inward. A platform is installed above the stamping equipment, and the lower part of the platform is placed in the groove and fixedly connected.

5. A hot stamping exhaust gas collection system as described in claim 4, characterized in that, A sealing plate is connected between the bottom end of the recess and the bottom end of the side wall of the annular air collection hood. The sealing plate is arranged around the recess and has multiple air inlets. The multiple air inlets form a regular shape. The annular air collection chamber is a ring-shaped chamber formed around the recess.

6. The hot stamping exhaust gas collection system as described in claim 5, characterized in that, The diameter of the plurality of air inlets gradually increases from the end closest to the air inlet assembly to the end furthest from the air inlet assembly.

7. A hot stamping exhaust gas collection system as described in claim 1, characterized in that, The air intake pipe assembly includes: The main suction pipe is connected at one end to the suction end of the induced draft fan and closed at the other end. A branch pipe for air intake, one end of which is connected to the side of the main pipe for air intake, and the inner diameter of the branch pipe for air intake is smaller than the inner diameter of the main pipe for air intake. The triangular suction pipe is arranged in a triangular shape, with the larger diameter end connected to the annular air collection chamber and the smaller diameter end connected to the other end of the suction pipe branch pipe. The exhaust gas passes sequentially through the triangular suction pipe, the branch pipe of the suction pipe, and the main pipe of the suction pipe before entering the induced draft fan.

8. The hot stamping exhaust gas collection system as described in claim 7, characterized in that, The suction pipe branch is connected to an electrically adjustable air valve, which is suitable for adjusting the gas flow rate inside the suction pipe branch.

9. A hot stamping exhaust gas collection system as described in claim 7, characterized in that, The air intake pipe branch is connected to a fireproof gate. The fireproof gate has a built-in temperature sensing element. When the internal temperature of the air intake pipe branch reaches 70°C, the fireproof gate is used to block the air intake pipe branch.

10. A hot stamping exhaust gas collection system as described in claim 7, characterized in that, The suction pipe branch is connected to a pressure sensor, which is adapted to monitor the gas pressure inside the suction pipe branch in real time.

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