A liftable top suction hood

Abstract

The utility model provides a kind of liftable top suction hood, including support, air suction device, exhaust duct and jacking device, pollution source circumferential arrangement jacking device, jacking device upper end fixed mounting support, support is located pollution source top, support upper end fixedly set multiple air suction devices, every air suction device is communicated to exhaust duct periphery, exhaust duct is set in workshop top and the air outlet end of exhaust duct is communicated external air exchange machine, jacking device is used to drive air suction device to approach or away from pollution source, air suction device is used to gather and suck away waste gas. The utility model discloses a kind of liftable top suction hood, can be lifted top suction hood when overhauling and lower top suction hood after overhauling, to solve the problem that traditional fixed type top suction hood cannot move up and down, interfere with regular inspection and maintenance work.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection, and in particular relates to a liftable top suction cover. Background Technology

[0002] As a basic capture device widely used in local ventilation systems, top-mounted hoods are used in industrial production and laboratory environments where many processes release pollutants such as fumes, vapors, or dust. These pollutants tend to diffuse upwards. Top-mounted hoods are designed to be installed directly above the pollution source, utilizing the inherent buoyancy and upward force of the polluted gas to capture it through the negative pressure field formed by the hood opening. This prevents the pollutants from spreading into the workshop or indoor atmosphere, ensuring personnel health and production safety. Traditionally, top-mounted hoods are fixed and cannot move up and down. They need to be disassembled during maintenance, which affects production and reduces efficiency. Utility Model Content

[0003] In view of this, the present invention aims to propose a liftable top suction cover to solve the problem that traditional fixed top suction covers cannot move up and down, which interferes with regular inspection and maintenance work.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A liftable top suction hood includes a bracket, a suction device, an exhaust pipe, and a lifting device. The lifting device is arranged around the pollution source, and the bracket is fixedly installed on the upper end of the lifting device. The bracket is located above the pollution source, and multiple suction devices are fixedly installed on the upper end of the bracket. Each suction device is connected to the periphery of the exhaust pipe. The exhaust pipe is located above the factory building, and the exhaust end of the exhaust pipe is connected to an external ventilation fan. The lifting device is used to move the suction devices closer to or away from the pollution source, and the suction devices are used to gather and suck away the exhaust gas.

[0005] Furthermore, the suction device includes a first tube, a second tube, and a top suction hood. The top suction hood is fixedly installed on the bracket. The suction end of the top suction hood faces the pollution source. The exhaust end of the top suction hood is connected to one end of the two second tubes. The two second tubes are arranged opposite each other. The other ends of the two second tubes are connected to both sides of the first tube. The upper end of the first tube is connected to the outside of the exhaust pipe.

[0006] Furthermore, the second pipe is a telescopic ventilation pipe, and a flue backflow preventer is installed at the connection between each second pipe and the top suction hood.

[0007] Furthermore, the lifting device includes a screw jack, with multiple screw jacks fixedly installed on the foundation, and the output end of each screw jack being fixedly connected to the lower end of the bracket.

[0008] Furthermore, the lifting device also includes a first steering gear, a second steering gear, a motor, a frame, a first shaft, and a second shaft. The first steering gear, the second steering gear, and the motor are fixedly mounted on the frame. The output shaft of the motor is connected to the input end of the first steering gear. The output ends on both sides of the first steering gear are respectively connected to the input end of the second steering gear through the first shaft. The output end of each second steering gear is connected to the input end of a screw jack through the second shaft.

[0009] Furthermore, a third shaft is provided between every two adjacent screw jacks located on the same side, and the two ends of the third shaft are respectively connected to the input end of a screw jack.

[0010] Furthermore, each screw jack and the lower end of the frame are provided with a shim.

[0011] Compared with the prior art, the adjustable top suction cover of this utility model has the following advantages: (1) The liftable top suction cover described in this utility model can be raised during maintenance and lowered after maintenance, so as to solve the problem that the traditional fixed top suction cover cannot move up and down, which interferes with the regular maintenance work.

[0012] (2) The lifting top suction hood described in this utility model has a structural design that can effectively gather exhaust gas, greatly improve the exhaust gas capture efficiency, reduce the concentration of harmful gases in the working environment, and protect the health of workers.

[0013] (3) The liftable top suction hood described in this utility model is equipped with a lifting device. Through the collaborative design of multiple components, it ensures that multiple screw jacks obtain uniform power and lift synchronously, effectively avoiding the tilting of the bracket due to uneven force, ensuring that the suction device is always in a horizontal state, ensuring accurate position of waste gas capture, and avoiding local waste gas escape due to tilting. The screw jack has a stable lifting and adjustment capability, and can accurately control the lifting distance of the suction device according to the height of the pollution source. It can adapt to various working conditions without disassembly and reassembly, greatly improving the applicability of the top suction hood. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a liftable top suction cover according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the air intake device described in an embodiment of the present utility model; Figure 3This is a schematic diagram of the lifting device described in an embodiment of the present utility model.

[0015] Explanation of reference numerals in the attached figures: 1-Bracket; 2-Suction device; 21-First pipe body; 22-Second pipe body; 23-Top suction hood; 24-Fluorescence check valve; 3-Exhaust pipe; 4-Lifting device; 41-Screw jack; 42-First steering gear; 43-Second steering gear; 44-Motor; 45-Frame; 46-First shaft; 47-Second shaft; 48-Third shaft; 5-Gasket. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, 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 utility model based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1As shown, a liftable top suction hood includes a bracket 1, suction devices 2, an exhaust pipe 3, and a lifting device 4. The lifting device 4 is arranged circumferentially around the pollution source. The bracket 1 is fixedly installed on the upper end of the lifting device 4, and the bracket 1 is located above the pollution source. Multiple suction devices 2 are fixedly installed on the upper end of the bracket 1. Each suction device 2 is connected to the periphery of the exhaust pipe 3. The exhaust pipe 3 is located above the factory building, and the outlet end of the exhaust pipe 3 is connected to an external ventilation fan. The waste gas sucked out by the ventilation fan is discharged to the waste gas purification equipment. The lifting device 4 is used to move the suction devices 2 closer to or away from the pollution source. The suction devices 2 are used to gather and suck away the waste gas. The ventilation fan is existing technology, and the model of the ventilation fan is GR. EX4005.89, the exhaust gas purification equipment is existing technology, the model of the exhaust gas purification equipment is Liyang VBN-12, the pollution source can be production equipment that easily generates dust pollution such as printing machines, galvanizing tanks, etc., a kind of liftable top suction hood, which can be raised during maintenance and lowered after maintenance is completed, to solve the problem that the traditional fixed top suction hood cannot move up and down, which interferes with the regular maintenance work.

[0021] like Figure 2 As shown, the suction device 2 includes a first pipe body 21, a second pipe body 22, and a top suction hood 23. The top suction hood 23 is fixedly installed on the bracket 1. The suction end of the top suction hood 23 faces the pollution source. The exhaust end of the top suction hood 23 is connected to one end of the two second pipe bodies 22. The two second pipe bodies 22 are arranged opposite each other. The other ends of the two second pipe bodies 22 are connected to both sides of the first pipe body 21. The upper end of the first pipe body 21 is connected to the periphery of the exhaust pipe 3. The second pipe body 22 is a telescopic ventilation pipe. A flue backflow preventer 24 is provided at the connection between each second pipe body 22 and the top suction hood 23. The flue backflow preventer 24 is existing technology. The model of the flue backflow preventer 24 is PFZF-DC-Φ160. After the external displacement fan starts, a continuous negative pressure is formed through the exhaust pipe 3, providing power for the flow of exhaust gas. Under the action of negative pressure, the exhaust gas generated by the pollution source gathers towards the suction end of the top suction hood 23 facing the pollution source. The top suction hood 23 performs preliminary collection of exhaust gas to reduce diffusion. The collected exhaust gas enters two opposing second pipes 22 through the exhaust end of the top suction hood 23. Since the second pipes 22 are telescopic ventilation pipes, they can move synchronously with the lifting device 4 to lift and lower the bracket 1 and the top suction hood 23, always keeping the airflow channel unobstructed. The flue check valve 24 at the connection between the second pipes 22 and the top suction hood 23 is opened, allowing the exhaust gas to pass through in one direction and preventing backflow of exhaust gas. The exhaust gas flows through the two second pipes 22 into the first pipe 21, and then is transported by the first pipe 21 to the exhaust pipe 3, and discharged from the factory through the air exchanger, completing the exhaust gas suction and discharge.

[0022] The top suction hood 23 is designed to effectively gather exhaust gas, significantly improving exhaust gas capture efficiency, reducing the concentration of harmful gases in the working environment, and protecting the health of workers. The telescopic characteristics of the second pipe 22 are compatible with the lifting device 4, allowing the suction device 2 to be flexibly adjusted according to the height of the pollution source without disassembly and reassembly, thus broadening the applicable scenarios of the top suction hood and enhancing the practicality of the equipment. The flue check valve 24 can prevent exhaust gas in the exhaust pipe 3 from flowing back into the pollution source area due to pressure fluctuations, avoiding secondary pollution and ensuring a clean working environment.

[0023] The lifting device 4 includes a screw jack 41, with multiple screw jacks 41 fixedly installed on the foundation. The output end of each screw jack 41 is fixedly connected to the lower end of a bracket 1. The lifting device 4 also includes a first steering mechanism 42, a second steering mechanism 43, a motor 44, a frame 45, a first shaft 46, and a second shaft 47. The first steering mechanism 42, the second steering mechanism 43, and the motor 44 are fixedly mounted on the frame 45. The output shaft of the motor 44 is connected to the input end of the first steering mechanism 42. The output ends on both sides of the first steering mechanism 42 are respectively connected to the input ends of the second steering mechanism 43 through the first shaft 46. The output end of each second steering mechanism 43 is connected to a... The input end of each screw jack 41 includes a motor 44 (existing technology, model LEADSHINE42CM06), a first steering gear 42 (existing technology, model HD spiral bevel gear commutator HD-09), and a second steering gear 43 (existing technology, model KT spiral bevel gear commutator KT-T2). A third shaft 48 is provided between every two adjacent screw jacks 41 located on the same side. The two ends of the third shaft 48 are connected to the input end of one screw jack 41, which is existing technology, model KOMADSWL2.5T. A lifting device 4 is installed, and through multi-component collaborative design, it ensures that multiple screw jacks 41 receive uniform power and lift synchronously, effectively preventing the support 1 from tilting due to uneven force, ensuring that the suction device 2 is always in a horizontal state, ensuring accurate exhaust gas capture position, and preventing local exhaust gas escape due to tilting. The screw jacks 41 have stable lifting and adjustment capabilities, and can accurately control the lifting distance of the suction device 2 according to the height of the pollution source. It can adapt to various working conditions without disassembly and reassembly, greatly improving the applicability of the top suction hood. Each screw jack 41 and the frame 45 is equipped with a shim 5 at the lower end. The lower end of 45 can effectively absorb the vibration and impact force generated during the operation of the screw jack 41, reducing the direct impact of vibration on the internal transmission components of the screw jack 41, the frame 45, and the factory foundation. This avoids loosening, wear, or foundation cracking caused by long-term vibration, extending the service life of the lifting device 4 and the overall equipment. It can also be finely adjusted by the thickness of the shim 5 to solve the problem of tilting of the screw jack 41 and the frame 45 caused by unevenness of the factory foundation surface, ensuring that the output height of multiple screw jacks 41 is consistent, thereby ensuring that the bracket 1 and the suction device 2 are always in a horizontal state, and avoiding the impact of tilt on the accuracy of the suction device 2 in collecting and capturing exhaust gas.

[0024] The working process of a liftable top suction cover: First, the lifting device 4 is activated according to the actual height of the pollution source. The power output of the motor 44 is turned by the first steering gear 42 and then transmitted to the second steering gear 43 through the first shaft 46. The second shaft 47 then distributes the power to each screw jack 41. Adjacent screw jacks 41 on the same side are synchronized through the third shaft 48, which drives the support 1 and the upper suction device 2 to rise and fall smoothly. After the position is determined, the external displacement fan is activated, and a negative pressure is formed through the exhaust pipe 3. The exhaust gas generated by the pollution source gathers towards the top suction hood 23 under the action of negative pressure. After initial collection by the top suction hood 23, the exhaust gas is kept clear by the telescopic second pipe 22 with a flue backflow preventer 24, which keeps the passage clear and prevents backflow of exhaust gas into the first pipe 21. Finally, the exhaust gas is transported by the first pipe 21 to the exhaust pipe 3 and discharged from the factory through the ventilation fan, completing the entire exhaust gas treatment process. During maintenance, the controller controls the motor 44 to rotate and raise the top suction hood. After maintenance is completed, the top suction hood is lowered to solve the problem that the traditional fixed top suction hood cannot move up and down, which interferes with the regular maintenance work.

[0025] In this embodiment, when the source of contamination is a printing press, the top suction hood needs to be set at a distance of 150mm from the source of contamination. During maintenance, the user can use the lifting device 4 to further raise the hood opening by 550mm.

[0026] List of devices required in this embodiment: 1 exhaust gas local collection top suction hood and supporting equipment Top suction cup (each glue tank top opening size 2400*680mm) Each pollution source is equipped with one hood at the top, each hood having a net size of 2400*680mm, made of galvanized steel with a thickness of 1.5mm. indivual 6 Zinc plating 2 support 60*60*3mm galvanized square tube m 54 Zinc plating 3 80*80*3mm galvanized square tube m 30 Zinc plating 4 Lifting device Screw jack, φ30 indivual 6 / 5 First shaft φ25 indivual 2 / 6 Second shaft φ25 indivual 2 / 7 Third shaft φ25 indivual 4 / 8 First steering gear CT6 tower 1 / 9 Second steering gear CT6 tower 2 / 10 Frame 60*60*3mm galvanized square tube m 66 Zinc plating 11 80*80*3mm galvanized square tube m 42 Zinc plating 12 first tube body PP folded air duct directional pipe m 12 PP 13 Second tube body PP directional pipe m 6 PP The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0027] 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, improvements, etc., 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 liftable top suction cover, characterized in that: Includes a support (1), an air intake device (2), an exhaust pipe (3), and a lifting device (4). The lifting device (4) is arranged around the pollution source. The support (1) is fixedly installed on the upper end of the lifting device (4). The support (1) is located above the pollution source. Multiple air intake devices (2) are fixedly installed on the upper end of the support (1). Each air intake device (2) is connected to the exhaust pipe (3). The exhaust pipe (3) is located above the factory building and the exhaust end of the exhaust pipe (3) is connected to an external air exchanger. The lifting device (4) is used to drive the air intake device (2) to approach or move away from the pollution source. The air intake device (2) is used to gather and suck away the waste gas.

2. The adjustable top suction cover according to claim 1, characterized in that: The suction device (2) includes a first tube (21), a second tube (22) and a top suction hood (23). The top suction hood (23) is fixedly installed on the bracket (1). The suction end of the top suction hood (23) faces the pollution source. The exhaust end of the top suction hood (23) is connected to one end of the two second tubes (22). The two second tubes (22) are arranged opposite each other. The other ends of the two second tubes (22) are connected to both sides of the first tube (21). The upper end of the first tube (21) is connected to the periphery of the exhaust pipe (3).

3. The adjustable top suction cover according to claim 2, characterized in that: The second pipe (22) is a telescopic ventilation pipe, and a flue backflow preventer (24) is installed at the connection between each second pipe (22) and the top suction hood (23).

4. The adjustable top suction cover according to claim 3, characterized in that: The lifting device (4) includes a screw jack (41), multiple screw jacks (41) are fixedly installed on the foundation, and the output end of each screw jack (41) is fixedly connected to the lower end of the bracket (1).

5. A liftable top suction cover according to claim 4, characterized in that: The lifting device (4) also includes a first steering gear (42), a second steering gear (43), a motor (44), a frame (45), a first shaft (46) and a second shaft (47). The frame (45) is set on the foundation. The first steering gear (42), the second steering gear (43) and the motor (44) are fixedly set on the frame (45). The output shaft of the motor (44) is connected to the input end of the first steering gear (42). The output ends on both sides of the first steering gear (42) are connected to the input end of the second steering gear (43) through the first shaft (46). The output end of each second steering gear (43) is connected to the input end of a screw jack (41) through the second shaft (47).

6. A liftable top suction cover according to claim 5, characterized in that: A third shaft (48) is provided between every two adjacent screw jacks (41) located on the same side, and the two ends of the third shaft (48) are respectively connected to the input end of a screw jack (41).

7. A liftable top suction cover according to claim 5, characterized in that: Each screw jack (41) and frame (45) has a shim (5) at its lower end.

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