Waste gas collecting device

Abstract

The utility model discloses a waste gas collecting device and relates to the technical field of waste gas treatment devices, the waste gas collecting device is used for collecting waste gas of a waste gas source, the waste gas collecting device comprises a rack, a gas collecting hood assembly and a gas suction pipe, the gas collecting hood assembly comprises a gas collecting hood body, and the gas collecting hood body is movably arranged on the rack; at least part of the gas collecting hood body can extend out of the rack in the first direction, and when at least part of the gas collecting hood body extends out of the rack, the gas collecting hood body is used for covering a waste gas source; the gas suction pipe is telescopically communicated with the gas-collecting hood body and is used for guiding waste gas in the gas-collecting hood body into waste gas purification equipment. According to the technical scheme, due to the fact that the gas collecting hood body can move in the first direction and the gas suction pipe is telescopic, the gas collecting hood body can extend out of the rack to collect waste gas of a waste gas source and can retract back to the rack after the waste gas is collected; therefore, the risk that the gas-collecting hood body interferes with the waste gas source equipment in operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment devices, and particularly relates to a waste gas collection device. Background Art

[0002] In industrial production such as chemical industry, machinery, electronics, and metallurgy, a large amount of waste gas is generated. These waste gases not only cause serious pollution to the environment but also may pose a threat to human health. In order to improve the working environment and meet environmental protection requirements, it is necessary to collect waste gas for purification treatment.

[0003] Since the models of many waste gas source devices that generate waste gas are relatively large in volume, with their length, width, and height exceeding several meters, the gas collection hood for collecting waste gas is correspondingly made larger and tries to wrap the waste gas source as much as possible. Some waste gas generating devices need to continuously open and close molds or move during the working cycle. However, the existing gas collection hood is directly covered on the waste gas source, which not only occupies a large area but also easily interferes with the waste gas source device. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a waste gas collection device, aiming to reduce the risk of interference between the waste gas collection device and the waste gas source device.

[0005] To achieve the above purpose, the waste gas collection device proposed by the utility model is used to collect waste gas from a waste gas source. The waste gas collection device includes:

[0006] A frame;

[0007] A gas collection hood assembly, including a gas collection hood body. The gas collection hood body is arranged on the frame and can move along a first direction. The gas collection hood body has an extended state extending out of the frame and a retracted state retracting into the frame. In the extended state, the gas collection hood body is used to cover the waste gas source; and

[0008] An air suction pipe, telescopically connected to the gas collection hood body, and the air suction pipe is used to introduce the waste gas in the gas collection hood body into a waste gas purification device.

[0009] In an embodiment, the gas collection hood assembly further includes a support beam. The support beam is arranged on the frame and is connected to the gas collection hood body. The support beam extends along the first direction and can move relative to the frame along the first direction.

[0010] In an embodiment, the waste gas collection device further includes a driving assembly. The driving assembly includes a driving member, a gear, and a rack. The driving member is arranged on the frame and is drivingly connected to the gear. The rack is arranged on the support beam and extends along the first direction, and the gear meshes with the rack.

[0011] In one embodiment, there are two support beams, two gears and two racks. The two support beams are respectively arranged on opposite sides of the air collecting hood body. The two racks are respectively arranged on the two support beams and are in one-to-one meshing engagement with the two gears. The driving assembly further includes a transmission shaft connected to the two gears, and the driving member drives the two gears through the transmission shaft.

[0012] In one embodiment, the exhaust gas collection device further includes a sliding assembly. The sliding assembly includes a first sliding member and a second sliding member that are slidably engaged with each other. The first sliding member is arranged on the frame, and the second sliding member is arranged on the support beam.

[0013] In one embodiment, one of the first sliding member and the second sliding member is configured as a linear guide rail, and the other is configured as a plurality of sliders that are slidably adapted to the linear guide rail.

[0014] In one embodiment, the air collecting hood body includes a top shell, a first side shell and two relatively arranged second side shells. The exhaust gas collection device further includes a fixed wall arranged on the frame. The fixed wall and the first side shell are distributed along the first direction, and the suction pipe passes through the fixed wall.

[0015] In one embodiment, the suction pipe is connected to the first side shell, and a plurality of suction ports are arranged along the first direction at one end of the suction pipe close to the first side shell.

[0016] In one embodiment, the suction pipe includes a plurality of telescopically connected sleeves. The plurality of sleeves are arranged inside the air collecting hood body and are arranged close to the top shell. In the extended state, the plurality of sleeves are arranged in sequence along the first direction, and each sleeve is provided with at least one suction port.

[0017] In one embodiment, the exhaust gas collection device further includes a support member. The support member is arranged on the frame and abuts against a side surface of the fixed wall away from the first side shell to support the fixed wall.

[0018] In one embodiment, the air collecting hood assembly further includes two skirt covers. The two skirt covers are arranged at the lower end of the air collecting hood body and are respectively connected to the two second side shells in one-to-one correspondence.

[0019] The technical solution of the present utility model enables the air collecting hood body to move along the first direction and the telescopic characteristic of the suction pipe, so that the air collecting hood body can not only extend out of the frame to collect the exhaust gas of the exhaust gas source, but also retract into the frame after the exhaust gas collection is completed, thereby reducing the risk of interference between the air collecting hood body and the exhaust gas source equipment that is in operation, and facilitating the normal operation of the exhaust gas source equipment. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 The sectional view of the exhaust gas collection device in an extended state according to an embodiment provided by the present invention;

[0022] Figure 2 The sectional view of the exhaust gas collection device in a retracted state according to an embodiment provided by the present invention;

[0023] Figure 3 The sectional view of the exhaust gas collection device from another perspective according to an embodiment provided by the present invention;

[0024] Figure 4 is Figure 3 The partial enlarged view of part A in

[0025] Explanation of the reference numerals in the drawings:

[0026] 10. Exhaust gas collection device; 20. Exhaust gas purification equipment; 100. Frame; 200. Gas collection hood assembly; 300. Suction pipe; 400. Driving assembly; 500. Sliding assembly; 600. Fixed wall; 700. Support member; 210. Gas collection hood body; 211. Top shell; 212. First side shell; 213. Second side shell; 220. Support beam; 230. Skirt; 310. Sleeve; 311. Suction port; 410. Driving member; 420. Gear; 430. Rack; 440. Transmission shaft; 510. Linear guide rail; 520. Slide block.

[0027] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] The present utility model provides an exhaust gas collection device 10.

[0032] Please refer to Figure 1 and Figure 2 , in an embodiment of the present utility model, the exhaust gas collection device 10 is used to collect the exhaust gas from an exhaust gas source. The exhaust gas collection device 10 includes a frame 100, a gas collection hood assembly 200, and an air suction pipe 300. The gas collection hood assembly 200 includes a gas collection hood body 210. The gas collection hood body 210 is arranged on the frame 100 and can move along a first direction. The gas collection hood body 210 has an extended state extending out of the frame 100 and a retracted state retracted into the frame 100. In the extended state, the gas collection hood body 210 is used to cover the exhaust gas source; the air suction pipe 300 is telescopically connected to the gas collection hood body 210, and the air suction pipe 300 is used to introduce the exhaust gas in the gas collection hood body 210 into the exhaust gas purification device 20.

[0033] Specifically, the exhaust gas collection device 10 is used to collect the exhaust gas generated by an exhaust gas source device during industrial production. The exhaust gas source device is a device that generates exhaust gas in industrial production such as chemical industry, machinery, electronics, metallurgy, etc. For example, during the production process of a die-casting machine, a large amount of smoke will be generated when the mold is opened, and its die-casting mold is a kind of exhaust gas source device.

[0034] The frame 100 serves as the basic structure of the entire waste gas collection device 10, providing support and fixing points for the air hood assembly 200 and the suction pipe 300. The frame 100 can be installed near the waste gas source device and maintain a certain distance from the waste gas source device, so as to facilitate the air hood body 210 to collect the waste gas of the waste gas source, and also reduce the risk of interference between the waste gas source device and the frame 100 during the working process.

[0035] The air hood assembly 200 includes an air hood body 210. The air hood body 210 is an important device for collecting the waste gas of the waste gas source and is in direct contact with the waste gas source. The air hood body 210 can move along the first direction, so that the air hood body 210 has two states: a protruding state and a retracted state. In the protruding state, the air hood body 210 at least partially protrudes from the frame 100 and covers the waste gas source to ensure that the waste gas is effectively captured to achieve the function of collecting waste gas; while in the retracted state, the air hood body 210 retracts into the frame 100, so that there is enough space for activities near the waste gas source, avoiding interference between the waste gas source device and the air hood body 210 during the operation process, thus facilitating the maintenance or operation of the waste gas source device. The first direction can be a horizontal direction, a vertical direction, or an inclined direction forming an angle with the horizontal direction.

[0036] In addition, since the air hood body 210 can move along the first direction, the air hood body 210 can be flexibly adjusted according to the position of the waste gas source device to avoid collision with surrounding devices or obstacles; at the same time, it can also adapt to waste gas sources at different positions, thereby improving the collection efficiency and flexibility.

[0037] The suction pipe 300 is used to introduce the waste gas collected in the air hood body 210 into the waste gas purification device 20 for purification treatment. The waste gas purification device 20 can be installed on the frame 100 so that the waste gas can be treated nearby. The waste gas purification is not only fast, but also saves the material used for the suction pipe 300, thereby reducing the production cost. The waste gas purification device 20 can also be installed in other positions, such as directly installed on the ground, or the waste gas is introduced into the waste gas purification tower through the suction pipe 300. Therefore, the suction pipe 300 can be directly connected to the waste gas purification device 20, or the waste gas can be introduced into the waste gas purification device 20 through other transfer devices.

[0038] The telescopic property of the suction pipe 300 further enhances the adaptability and safety of the waste gas collection device 10. When the position of the air hood body 210 is adjusted, the suction pipe 300 can automatically adjust its length to maintain a stable connection with the waste gas source, ensuring both airtightness and avoiding interference with other devices due to too long or too short pipes, thereby reducing the risk of accidental collision and at the same time reducing the maintenance cost.

[0039] The technical solution of the present utility model enables the air collection hood body 210 to move along the first direction and the telescopic property of the suction pipe 300, so that the air collection hood body 210 can extend out of the frame 100 to collect the waste gas of the waste gas source and can retract into the frame 100 after the waste gas collection is completed, thereby reducing the risk of interference between the air collection hood body 210 and the waste gas source equipment in operation, facilitating the normal operation of the waste gas source equipment.

[0040] In one embodiment, please refer to Figure 1 and Figure 2 , the air collection hood assembly 200 further includes a support beam 220. The support beam 220 is disposed on the frame 100 and is connected to the air collection hood body 210. The support beam 220 extends along the first direction and can move relative to the frame 100 along the first direction.

[0041] As a bridge connecting the air collection hood body 210 and the frame 100, the support beam 220 extends along the first direction, provides additional support for the air collection hood body 210, enhances the rigidity and stability of the overall structure, and ensures the stability of the connection between the air collection hood body 210 and the frame 100 after the air collection hood body 210 extends out of the frame 100. The air collection hood body 210 can be directly installed above the support beam 220, or one end of the support beam 220 is connected to the outer surface of the air collection hood body 210, so that the support beam 220 can form an integral body with the air collection hood body 210 and move along the first direction together. In the extended state, when at least a part of the air collection hood body 210 extends out of the frame 100, the support beam 220 can partially extend out of the frame 100, and the end of the support beam 220 connected to the air collection hood body 210 can also just be located at the edge of the frame 100. In this way, the support beam 220 can support the air collection hood body 210 to prevent the air collection hood body 210 from falling. Moreover, due to the existence of the support beam 220, the air collection hood body 210 can also be separated from the frame 100, enabling the air collection hood body 210 to move a longer distance. In addition, the air collection hood body 210 may be affected by external forces such as wind pressure and waste gas pressure during operation. The existence of the support beam 220 can effectively disperse these forces and reduce the risk of structural deformation or damage.

[0042] In other embodiments, a locking structure can also be provided at the edge of the frame 100 to lock the air collection hood body 210 to prevent the air collection hood body 210 from falling; or a tensioning device can be provided on the frame 100 to tension the air collection hood body 210.

[0043] In one embodiment, please refer to Figure 3 and Figure 4, the exhaust gas collection device 10 further includes a driving component 400. The driving component 400 includes a driving member 410, a gear 420, and a rack 430. The driving member 410 is disposed on the frame 100 and is drivingly connected to the gear 420. The rack 430 is disposed on the support beam 220 and extends along the first direction. The gear 420 meshes with the rack 430.

[0044] The driving member 410 (such as a driving motor or a hydraulic motor, etc.) is installed on the frame 100 and is responsible for providing power. By receiving a control signal, the driving member 410 can precisely control the rotation speed and direction of the gear 420, thereby regulating the movement of the entire air hood assembly 200. The rack 430 is fixed on the support beam 220 and extends along the first direction. When the driving member 410 drives the gear 420 to rotate, the interaction between the gear 420 and the rack 430 will generate a linear displacement, so that the support beam 220 and the air hood body 210 connected thereto move smoothly along the first direction together, ensuring the smoothness and accuracy of the movement process, and avoiding the friction or jamming problems that may be encountered in traditional sliding or roller systems. The precise meshing of the gear 420 and the rack 430 ensures the stability of the movement of the air hood assembly 200, reducing the risk of equipment damage caused by mechanical vibration or impact. At the same time, the automatic control of the driving component 400 also reduces the possibility of manual operation errors and improves the safety performance of the entire system.

[0045] In an embodiment, please refer to Figure 3 and Figure 4 , there are two support beams 220, two gears 420, and two racks 430. The two support beams 220 are respectively disposed on opposite sides of the air hood body 210. The two racks 430 are respectively disposed on the two support beams 220 and mesh with the two gears 420 in a one-to-one correspondence. The driving component 400 further includes a transmission shaft 440 connected to the two gears 420. The driving member 410 drives the two gears 420 through the transmission shaft 440.

[0046] The two support beams 220 are respectively located on both sides of the air hood body 210, which can evenly distribute the weight of the air hood body 210, ensure the structural balance during the movement process, avoid the inclination or instability phenomenon that may be caused by unilateral force, and can significantly improve the stability and reliability of the overall structure. Moreover, the configuration of the double support beams 220, gears 420, and racks 430 improves the load-bearing capacity of the air hood assembly 200. In the case of handling a large amount of exhaust gas or requiring a larger coverage area of the air hood body 210, the bilateral drive can better cope with the increased load and ensure the stable operation of the air hood assembly 200 device under high load conditions.

[0047] By engaging two gears 420 with corresponding racks 430, the driving member 410 drives these two gears 420 simultaneously through the transmission shaft 440, ensuring the synchronous movement of the two side support beams 220, eliminating the uneven forces that may be generated by a single driving system, and improving the accuracy and synchronism of the air hood assembly 200 during movement. Moreover, one driving member 410 can control the gears 420 on both sides simultaneously, simplifying the structure of the driving assembly 400, reducing the production cost, while also reducing the failure points, and improving the overall reliability and maintenance convenience of the driving assembly 400.

[0048] In other embodiments, a single support beam 220 may also be provided. The single support beam 220 is connected to the middle of the air hood body 210 to ensure the balance of the force on the air hood body 210; two or more support beams 220 may also be provided at intervals according to the specifications of the air hood body 210. The multiple support beams 220 can be driven by a single driving member 410, or each support beam 220 can be driven by a separate driving member 410. There is no limitation here.

[0049] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 , the exhaust gas collection device 10 further includes a sliding assembly 500. The sliding assembly 500 includes a first sliding member and a second sliding member that are slidably engaged. The first sliding member is provided on the frame 100, and the second sliding member is provided on the support beam 220.

[0050] The sliding assembly 500 includes a first sliding member and a second sliding member, and the two achieve the smooth movement of the air hood assembly 200 through sliding cooperation. The first sliding member is fixed on the frame 100, while the second sliding member is installed on the support beam 220. When the driving assembly 400 is started to move the support beam 220 and the air hood body 210 in the first direction, relative sliding will occur between the first sliding member and the second sliding member, which not only ensures low friction and high stability during the movement, but also plays a guiding role in the movement of the air hood assembly 200.

[0051] In one embodiment, please refer to Figure 1 , one of the first sliding member and the second sliding member is configured as a linear guide rail 510, and the other is configured as a plurality of sliders 520. The sliders 520 are slidably adapted to the linear guide rail 510.

[0052] The combination of the linear guide 510 and the slider 520 provides extremely high guiding accuracy and stability. As a fixed guiding element, the linear guide 510 ensures the accurate movement of the slider 520 along the predetermined path, and can maintain the smooth movement of the air hood assembly 200 even under high-speed operation or heavy load conditions, avoiding unnecessary vibration and deviation. Compared with traditional sliding or rolling bearing systems, the combination of the linear guide 510 and the slider 520 significantly reduces the friction coefficient. When the slider 520 slides on the linear guide 510, the contact area is reduced and the friction force is reduced accordingly, which not only reduces energy consumption, but also extends the service life of the system and reduces maintenance costs. The design of the linear guide 510 and the slider 520 can withstand high loads and frequent movements, and is particularly suitable for working environments that require high-frequency adjustment of the position of the air hood assembly 200.

[0053] The plurality of sliders 520 are arranged at intervals on the frame 100 along the first direction, and the linear guide rail 510 is arranged on the support beam 220 and extends along the first direction. Conversely, the linear guide rail 510 may be arranged on the frame 100 and extend along the first direction, and the plurality of sliders 520 may be arranged at intervals on the support beam 220 along the first direction.

[0054] In other embodiments, the first sliding member and the second sliding member may also be configured as a sliding rail and a sliding groove.

[0055] In one embodiment, see Figures 1 to 3 The air collecting hood body 210 includes a top shell 211, a first side shell 212 and two oppositely arranged second side shells 213. The exhaust gas collecting device 10 also includes a fixed wall 600 arranged on the frame 100. The fixed wall 600 and the first side shell 212 are distributed along the first direction, and the intake pipe 300 is passed through the fixed wall 600.

[0056] The fixed wall 600 is relatively fixedly installed on the frame 100, and the distance between the fixed wall 600 and the exhaust gas purification device 20 is fixed; the distance between the fixed wall 600 and the first side shell 212 increases as the hood body 210 extends out of the frame 100, and decreases as the hood body 210 retracts into the frame 100. It can be understood that when exhaust gas needs to be collected, the hood body 210 extends out of the frame 100, and the fixed wall 600 participates in the exhaust gas collection as a part of the hood body 210 (equivalent to a side wall of the hood body 210 opposite to the first side shell 212); and when the exhaust gas collection is completed, the fixed wall 600 remains stationary, and the hood body 210 retracts into the frame 100, so that the fixed wall 600 is accommodated in the hood body 210.

[0057] The suction pipe 300 passes through the fixed wall 600. The fixed wall 600 also functions to install and fix the suction pipe 300. When the air collection hood body 210 extends or retracts from the frame 100, the part of the suction pipe 300 connected to the fixed wall 600 does not need to undergo relative movement, so a fixed connection can be adopted at this connection. In this way, the fixed wall 600 can not only well support the suction pipe 300, but also ensure the sealing between the suction pipe 300 and the fixed wall 600, avoiding the leakage of waste gas from the gap between the two. At the same time, the fixed wall 600 will not affect the movement of the air collection hood body 210.

[0058] In other embodiments, the fixed wall 600 can also be used as a side wall of the air collection hood body 210 and move together with the air collection hood assembly 200. The telescopic part of the suction pipe 300 is located outside the fixed wall 600, and the switching between the extended state and the retracted state of the air collection hood body 210 can also be realized.

[0059] In one embodiment, please refer to Figure 1 , the suction pipe 300 is connected to the first side shell 212, and a plurality of suction ports 311 are provided at one end of the suction pipe 300 close to the first side shell 212 along the first direction.

[0060] The suction pipe 300 is connected to the first side shell 212. On the one hand, the connection between the suction pipe 300 and the air collection hood body 210 is more stable. On the other hand, under the action of the pulling force and pushing force of the first side shell 212 on the suction pipe 300, the telescoping of the suction pipe 300 is more convenient.

[0061] The setting of the plurality of suction ports 311 increases the inlet area of the waste gas entering the suction pipe 300, reduces the resistance when the air flow passes through the suction ports 311, can quickly and without dead angle extract the waste gas, thereby improving the speed and efficiency of waste gas collection, so as to be able to timely and effectively process the generated waste gas. Moreover, the design of the plurality of suction ports 311 can also ensure that the air flow distribution from the waste gas source into the suction pipe 300 is more uniform, avoiding the air flow concentration and turbulence phenomena that may be caused by a single suction port 311, and improving the efficiency and quality of waste gas collection. Especially in the case of dealing with a large-area waste gas source or uneven air flow distribution, the multiple suction ports 311 can better adapt to different air flow conditions and ensure the waste gas collection efficiency. In addition, the uniformly distributed air flow also helps to reduce the noise level during the suction process, and at the same time reduces the additional energy consumption to overcome the uneven air flow.

[0062] In one embodiment, please refer to Figure 1 and Figure 2 , the suction pipe 300 includes a plurality of telescopically connected sleeves 310. The plurality of sleeves 310 are arranged inside the air collection hood body 210 and are arranged close to the top shell 211. In the extended state, the plurality of sleeves 310 are arranged in sequence along the first direction, and at least one suction port 311 is provided on each sleeve 310.

[0063] The telescopically connected sleeve 310 enables the suction pipe 300 to automatically adjust its length according to the position change of the air collecting hood body 210. This flexibility ensures that the suction pipe 300 can maintain the best connection with the air collecting hood body 210 regardless of the state of the air collecting hood (extended or retracted), improving the efficiency of waste gas collection. The sleeve 310 is arranged close to the top shell 211, which helps to optimize the air flow path. After the waste gas enters the air collecting hood body 210 from the waste gas source, the high-temperature waste gas will rise. The sleeve 310 is arranged close to the top shell 211 so that the suction ports 311 distributed on the sleeve 310 can guide the high-temperature waste gas into the suction pipe 300, improving the efficiency and effect of waste gas collection. The design of multiple sleeves 310 not only realizes the function that the suction pipe 300 can be telescopic, but also disperses the load during the suction process by increasing the number of suction ports 311, reducing the pressure borne by a single suction port 311, thereby enhancing the stability and durability of the suction pipe 300. In addition, the structure of the telescopically connected sleeve 310 makes the replacement and maintenance of a single sleeve 310 simple and fast. Without disassembling the entire suction pipe 300, only the problematic sleeve 310 needs to be replaced, greatly reducing the maintenance cost and downtime and improving the operation efficiency of the system.

[0064] In other embodiments, the suction pipe 300 can also adopt corrugated pipes, elastic pipes, etc. to achieve its characteristic of being able to freely expand and contract. Moreover, the part of the suction pipe 300 that realizes free expansion and contraction can be located inside the air collecting hood body 210 or outside the air collecting hood body 210.

[0065] In one embodiment, please refer to Figure 1 and Figure 2 , the waste gas collection device 10 further includes a support member 700. The support member 700 is arranged on the frame 100 and abuts against one side surface of the fixed wall 600 away from the first side shell 212 to support the fixed wall 600.

[0066] As an additional support for the fixed wall 600, the support member 700 can effectively disperse the force borne by the fixed wall 600 when the air collecting hood body 210 is working. Especially when the waste gas collection device 10 is in the extended state and the air collecting hood body 210 bears a large external pressure or air flow impact, the fixed wall 600 will also be subjected to a large external pressure or air flow impact. The support member 700 can prevent the fixed wall 600 from deforming, being damaged or displaced, and maintain stability, improving the durability and safety of the fixed wall 600. The support member 700 can specifically be a support frame, a support plate, a support rod, a support block, etc.

[0067] In one embodiment, please refer to Figures 1 to 3, the air collecting hood assembly 200 further includes two skirt covers 230, and the two skirt covers 230 are arranged at the lower end of the air collecting hood body 210 and are respectively connected to the two second side shells 213 in a one-to-one correspondence.

[0068] The skirt cover 230 is connected to the lower end of the air collecting hood body 210 and corresponds to the second side shell 213 one by one, increasing the wrapping space of the air collecting hood body 210, and can better and more cover the waste gas source, effectively preventing the waste gas from leaking from the bottom of the air collecting hood body 210, ensuring that more waste gas is collected and improving the collection efficiency. At the same time, the skirt cover 230 helps to improve the air flow direction of the waste gas. By guiding the waste gas to flow upward, it avoids the accumulation or diffusion of the waste gas at the bottom and ensures that the waste gas can smoothly enter the suction pipe 300.

[0069] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An exhaust gas collection device for collecting exhaust gas from an exhaust gas source, characterized in that: The exhaust gas collecting device comprises: frame; A gas collecting hood assembly, comprising a gas collecting hood body, the gas collecting hood body being arranged on the frame and being movable in a first direction, the gas collecting hood body having an extended state extending out of the frame and a retracted state retracted into the frame, in which the gas collecting hood body is arranged to cover the exhaust gas source in the extended state; and The air intake pipe is telescopically connected to the air collecting hood body, and the air intake pipe is used to guide the exhaust gas in the air collecting hood body to the exhaust gas purification equipment.

2. The exhaust gas collection device according to claim 1, characterized in that: The gas collecting hood assembly further comprises a support beam, which is arranged on the frame and connected to the gas collecting hood body. The support beam extends along the first direction and can move relative to the frame along the first direction.

3. The exhaust gas collection device according to claim 2, characterized in that: The exhaust gas collection device also includes a driving assembly, which includes a driving member, a gear and a rack. The driving member is arranged on the frame and drives the gear. The rack is arranged on the support beam and extends along the first direction. The gear is meshed with the rack.

4. The exhaust gas collection device according to claim 3, characterized in that: The support beam, the gear and the rack are each provided with two, the two support beams are respectively provided on the two opposite sides of the air collecting hood body, the two racks are respectively provided on the two support beams, and mesh with the two gears one by one; the driving assembly also includes a transmission shaft connected to the two gears, and the driving member drives the two gears through the transmission shaft.

5. The exhaust gas collection device according to claim 2, characterized in that: The exhaust gas collecting device further comprises a sliding assembly, wherein the sliding assembly comprises a first sliding member and a second sliding member that are slidably matched, wherein the first sliding member is arranged on the frame, and the second sliding member is arranged on the support beam.

6. The exhaust gas collection device according to claim 5, characterized in that: One of the first sliding member and the second sliding member is configured as a linear guide rail, and the other is configured as a plurality of sliders, and the sliders are slidably adapted to the linear guide rail.

7. The exhaust gas collection device according to claim 1, characterized in that: The air collecting hood body includes a top shell, a first side shell and two oppositely arranged second side shells. The exhaust gas collecting device also includes a fixed wall arranged on the frame. The fixed wall and the first side shell are distributed along the first direction. The air intake pipe is passed through the fixed wall.

8. The exhaust gas collection device according to claim 7, characterized in that: The air intake pipe is connected to the first side shell, and one end of the air intake pipe close to the first side shell is provided with a plurality of air intake ports along the first direction.

9. The exhaust gas collection device according to claim 8, characterized in that: The air intake pipe includes a plurality of telescopically connected sleeves, the plurality of sleeves are arranged in the air collecting hood body and close to the top shell. In the extended state, the plurality of sleeves are arranged in sequence along the first direction, and each sleeve is provided with at least one air intake port.

10. The exhaust gas collection device according to claim 8, characterized in that: The exhaust gas collecting device further comprises a support member, which is disposed on the frame and abuts against a side surface of the fixed wall away from the first side shell to support the fixed wall; And / or, the air collecting hood assembly further includes two skirt covers, which are arranged at the lower end of the air collecting hood body and are connected to the two second side shells in a one-to-one correspondence.

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