Laboratory waste gas extraction device

Abstract

The utility model discloses a laboratory waste gas extraction device, which comprises a fixed pipe, a movable pipe group and a gas extraction cover, the fixed pipe is used for being fixed on a ceiling, the fixed pipe is provided with gas extraction equipment, and the gas extraction equipment is used for providing power for extracting waste gas. The movable pipe set is connected to the fixed pipe, the movable pipe set is communicated with the fixed pipe to form an exhaust channel for exhausting waste gas, and the movable pipe set can rotate to adjust the position of the waste gas to be sucked. The exhaust hood is connected to the end of the movable pipe set and is a semicircular hood body, a connecting cylinder is arranged at the top of the exhaust hood, an opening used for being connected with the movable pipe set is formed in the top of the connecting cylinder, the connecting cylinder is provided with a limiting return edge in the circumferential direction of the opening, and the limiting return edge is located on the inner side wall of the connecting cylinder. A receding notch is formed between the two ends of the limiting turned edge.

Description

Technical Field

[0001] This utility model relates to the field of laboratory safety equipment technology, and in particular to a laboratory exhaust gas extraction device. Background Technology

[0002] In laboratory environments, exhaust gas extraction devices are crucial for ensuring the health of staff and the safety of the laboratory environment. However, existing exhaust gas extraction devices often feature complex connections between the extraction hood and the movable pipe, increasing the difficulty of installation and disassembly, and impacting the efficiency of daily maintenance, cleaning, and disinfection. Since extraction hoods easily accumulate dust and contaminants during use, regular disassembly, cleaning, and disinfection are key to ensuring stable performance and operational efficiency. Therefore, developing an exhaust gas extraction device that is easy to disassemble, clean, and disinfect is of paramount importance. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a laboratory exhaust gas extraction device that simplifies the connection between the extraction hood and the movable tube, and improves the convenience of disassembling, cleaning, and disinfecting the extraction hood.

[0004] A laboratory waste gas extraction device according to a first aspect of the present invention includes a fixed pipe, a movable pipe assembly, and an extraction hood. The fixed pipe is fixed to the ceiling and is equipped with an extraction device for providing power to extract waste gas. The movable pipe assembly is connected to the fixed pipe and communicates with the fixed pipe to form an exhaust channel for discharging waste gas. The movable pipe assembly is rotatable to adjust the position of the waste gas to be extracted. The extraction hood is connected to the end of the movable tube assembly. The extraction hood is a semi-circular hood with a connecting cylinder at its top. The top of the connecting cylinder has an opening for connecting the movable tube assembly. The connecting cylinder has a limiting edge along the circumference of the opening. The limiting edge is located on the inner side wall of the connecting cylinder, and a clearance notch is formed between the two ends of the limiting edge. The movable tube assembly has a limiting side plate along its circumference. By aligning the clearance notch and the limiting side plate, the connecting cylinder is fitted onto the movable tube assembly. The extraction hood is rotated so that the end of the limiting side plate abuts against the bottom surface of the limiting edge to fix the extraction hood and the movable tube assembly.

[0005] The laboratory exhaust gas extraction device according to the embodiments of this utility model has at least the following beneficial effects: The extraction hood is connected to the end of the movable tube and is semi-circular in shape, which can more effectively cover and capture exhaust gas. A connecting cylinder is provided at the top of the extraction hood, with an opening at the top for connection to the movable tube. A limiting flange is provided along the circumference of the opening on the connecting cylinder, located on the inner wall of the connecting cylinder, and a clearance notch is provided between the two ends of the limiting flange. A limiting plate is provided along the circumference of the movable tube. When it is necessary to connect the extraction hood to the movable tube, the user only needs to place the connecting cylinder onto the movable tube and rotate the extraction hood so that the end of the limiting plate abuts against the bottom surface of the limiting flange. This simple rotation action achieves a stable connection between the extraction hood and the movable tube without the need for additional fasteners. By rotating the movable tube, the user can easily adjust the position of the extraction hood to adapt to exhaust gas sources at different locations or heights, improving the efficiency and flexibility of exhaust gas extraction. The design of the limiting edge and the limiting side plate ensures a stable connection between the air extraction hood and the movable tube, preventing loosening or detachment due to airflow impact during the extraction process. Furthermore, the combination of the limiting edge and the limiting side plate forms a structure similar to a rotating buckle, eliminating the need for complex tools or additional fasteners, greatly simplifying the installation and disassembly process and facilitating daily assembly, cleaning, and disinfection.

[0006] According to some embodiments of this utility model, two limiting return edges are provided, and two clearance notches are formed between the ends of the two limiting return edges, and two limiting side plates are provided accordingly.

[0007] According to some embodiments of this utility model, the limiting back edge is arranged perpendicularly to the inner wall of the connecting cylinder.

[0008] According to some embodiments of this utility model, one end of the limiting flange is folded towards the inner wall of the connecting cylinder to form a flange, the flange cooperates with the inner wall of the connecting cylinder to form a groove, the exhaust hood is sleeved on the movable tube assembly and rotates, and the limiting side plate can be engaged in the groove.

[0009] According to some embodiments of this utility model, the flange and the limiting flange are integrally formed.

[0010] According to some embodiments of this utility model, a guide slope is provided between the limiting return edge and the flange, the guide slope is inclined toward the inner wall of the connecting cylinder, and the inclination angle gradually increases.

[0011] According to some embodiments of this utility model, the flange is provided with a limiting protrusion at the farthest end away from the limiting return edge, and the distance between the limiting protrusion and the inner wall of the connecting cylinder is less than the thickness of the limiting side plate.

[0012] According to some embodiments of the present invention, the movable tube assembly includes at least two connecting tubes arranged at an angle to each other. The end of the fixed tube is connected to the ends of the two connecting tubes by connecting shafts. Both connecting tubes can rotate around the axis of the connecting shaft to adjust the position and angle of the exhaust hood.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 This is a schematic diagram of a laboratory exhaust gas extraction device according to an embodiment of the present invention;

[0016] Figure 2 This is a partial schematic diagram of the limiting return edge of the laboratory exhaust gas extraction device according to an embodiment of the present invention.

[0017] Reference numerals: Fixed pipe 100; Air extraction device 200; Movable pipe 300; Connecting pipe 310; Connecting shaft 320; Air extraction hood 400; Connecting cylinder 401; Limiting flange 410; Flanged edge 411; Guide slope 412; Limiting protrusion 413; Relief notch 414. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Reference Figure 1 and Figure 2This utility model proposes a laboratory waste gas extraction device, including a fixed pipe 100, a set of movable pipes 300, and an extraction hood 400. The fixed pipe 100 is fixed to the ceiling and is equipped with an extraction device 200, which provides the power to extract waste gas. The set of movable pipes 300 is connected to the fixed pipe 100 and communicates with the fixed pipe 100 to form an exhaust channel for discharging waste gas. The set of movable pipes 300 can rotate to adjust the position of the waste gas to be extracted. The suction hood 400 is connected to the end of the movable tube 300 assembly. The suction hood 400 is a semi-circular hood. A connecting cylinder 401 is provided on the top of the suction hood 400. The top of the connecting cylinder 401 has an opening for connecting the movable tube 300 assembly. A limiting flange 410 is provided on the circumference of the opening of the connecting cylinder 401. The limiting flange 410 is located on the inner side wall of the connecting cylinder 401, and a clearance notch 414 is formed between the two ends of the limiting flange 410. A limiting side plate is provided on the circumference of the movable tube 300 assembly. By aligning the clearance notch 414 and the limiting side plate, the connecting cylinder 401 is fitted onto the movable tube 300 assembly. The suction hood 400 is rotated so that the end of the limiting side plate abuts against the bottom surface of the limiting flange 410 to fix the suction hood 400 and the movable tube 300 assembly.

[0023] In a specific embodiment, the fixed pipe 100 is fixed to the ceiling of the laboratory, serving as a support and foundation for the entire extraction system. An extraction device 200 is installed inside the fixed pipe 100 to provide power for extracting waste gas. The movable pipe 300 is connected to the fixed pipe 100, forming a continuous exhaust channel. One end of the movable pipe 300 is connected to the fixed pipe 100, creating a continuous exhaust channel that allows waste gas to flow smoothly. The other end of the movable pipe 300 is connected to the extraction hood 400, and the movable pipe 300 is designed to be rotatable. This allows the user to adjust the orientation of the extraction hood 400 by rotating the movable pipe 300 according to the specific location of the waste gas source, thereby achieving the best extraction effect. The extraction hood 400 is connected to the end of the movable pipe 300 and is used to capture and collect waste gas. The extraction hood 400 is a semi-circular hood with a connecting cylinder 401 at the top. The connecting cylinder 401 contains a quick-connect mechanism for a quick and secure connection with the movable pipe 300.

[0024] Furthermore, the extraction hood 400 is connected to the end of the movable pipe 300. Its semi-circular shape allows for more effective coverage and capture of exhaust gases. A connecting cylinder 401 with an opening at its top is provided on the top of the extraction hood 400 for connection to the movable pipe 300. A limiting flange 410 is provided around the opening of the connecting cylinder 401, located on the inner wall of the connecting cylinder 401, with a clearance notch 414 between its two ends. The movable pipe 300 has a limiting plate around its circumference. When connecting the extraction hood 400 to the movable pipe 300, the user simply places the connecting cylinder 401 onto the movable pipe 300 and rotates the extraction hood 400 so that the end of the limiting plate abuts against the bottom surface of the limiting flange 410. This simple rotation achieves a secure connection between the extraction hood 400 and the movable pipe 300 without the need for additional fasteners.

[0025] By rotating the movable tube 300, users can easily adjust the position of the extraction hood 400 to adapt to exhaust gas sources at different locations or heights, improving the efficiency and flexibility of exhaust gas extraction. The matching design of the limiting edge 410 and the limiting plate ensures a stable connection of the extraction hood 400 on the movable tube 300, preventing loosening or detachment due to airflow impact during extraction. Furthermore, the combination of the limiting edge 410 and the limiting plate forms a structure similar to a rotating buckle, eliminating the need for complex tools or additional fasteners, greatly simplifying the installation and disassembly process, and facilitating daily disassembly, cleaning, and disinfection.

[0026] In some embodiments, the connecting cylinder 401 of the fume extractor 400 is provided with two limiting flanges 410, which are located on both sides of the opening of the connecting cylinder 401, and two symmetrical clearance notches 414 are formed between their ends. Correspondingly, two limiting side plates are also provided on the movable tube 300, and the position and shape of these two limiting side plates match the clearance notches 414. When the fume extractor 400 needs to be connected to the movable tube 300, the user only needs to align the connecting cylinder 401 with the movable tube 300 and ensure that the two limiting side plates are aligned with the two clearance notches 414 respectively. Then, by rotating the fume extractor 400, the two limiting side plates will abut against the bottom surface of the corresponding limiting flanges 410, thereby achieving a stable connection.

[0027] To ensure that the limiting edge 410 can effectively restrict the movement of the limiting plate, the limiting edge 410 is perpendicular to the inner wall of the connecting cylinder 401. In this way, when the limiting plate abuts against the bottom surface of the limiting edge 410, the contact area between them is maximized to form a stable support structure and prevent the exhaust hood 400 from loosening or falling off during the exhaust process.

[0028] Furthermore, one end of the limiting flange 410 is folded towards the inner wall of the connecting cylinder 401 to form a flange 411. This flange 411 and the inner wall of the connecting cylinder 401 together form a groove. When the exhaust hood 400 is fitted onto the movable tube 300 and rotates, the limiting flange can be engaged in this groove, thereby achieving a more stable and reliable connection.

[0029] It should be noted that, in order to simplify the manufacturing process and improve the overall structural integrity, the limiting flange 410 and the flange 411 are integrally formed. This makes the connection between them more secure and less prone to loosening or damage.

[0030] To facilitate correct installation of the fume extractor 400 onto the movable tube 300, a guide slope 412 is provided between the limiting flange 410 and the flange 411. The guide slope 412 is inclined towards the inner wall of the connecting tube 401, and the inclination angle gradually increases. When the user aligns the connecting tube 401 with the movable tube 300 and attempts to rotate the fume extractor 400, the guide slope 412 will guide the user, helping the limiting flange to smoothly engage with the slot.

[0031] To meet the needs of different experimental platforms or exhaust gas source locations, the movable pipe 300 group includes at least two connecting pipes 310 arranged at an angle to each other. The ends of both connecting pipes 310 are connected to the end of the fixed pipe 100 via a connecting shaft 320, allowing them to rotate freely around the axis of the connecting shaft 320. By adjusting the rotation angle and position of these two connecting pipes 310, the user can flexibly adjust the position and angle of the exhaust hood 400 to ensure optimal exhaust gas extraction.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A laboratory exhaust extraction apparatus, characterized by, The utility model relates to a kind of exhaust device, including: Fixed pipe for fixing in ceiling, the fixed pipe is provided with suction equipment, the suction equipment is used to provide the power of suction exhaust gas; Movable pipe group is connected to the fixed pipe, the movable pipe group is communicated with the fixed pipe to form exhaust passage of exhaust gas, the movable pipe group can be rotated to adjust the position of suction exhaust gas; Exhaust hood is connected to the end of the movable pipe group, the exhaust hood is semicircular cover, the top of the exhaust hood is provided with connecting barrel, the top of the connecting barrel has opening for connecting movable pipe group, the connecting barrel is provided with limiting return edge along the circumference of the opening, the limiting return edge is located in the inner side wall of the connecting barrel, and clearance gap is formed between the two ends of the limiting return edge, the movable pipe group is provided with limiting edge plate along the circumference, by aligning the clearance gap and the limiting edge plate, the connecting barrel is sleeved on the movable pipe group, the exhaust hood is rotated to make the end of the limiting edge plate abut the bottom surface of the limiting return edge, to fix the exhaust hood and the movable pipe group.

2. The laboratory exhaust extraction device of claim 1, wherein, The limiting return edge is provided with two, two clearance gaps are formed between the ends of the two limiting return edges, and the limiting edge plate is correspondingly provided with two.

3. The laboratory exhaust extraction device of claim 2, wherein, The limiting return edge and the inner side wall of the connecting barrel are perpendicular to each other.

4. The laboratory exhaust extraction device of claim 1, wherein, One end of the limiting return edge is folded towards the inner side wall of the connecting barrel to form a flange, the flange cooperates with the inner side wall of the connecting barrel to form a clamping groove, and the limiting edge plate can be clamped in the clamping groove after the exhaust hood is sleeved on the movable pipe group and rotated.

5. The laboratory exhaust extraction apparatus of claim 4, wherein, The flange and the limiting return edge are integrally formed.

6. The laboratory exhaust extraction device of claim 5, wherein, A guide slope is provided between the flange and the limiting return edge, the guide slope is inclined towards the inner wall of the connecting barrel, and the inclination angle gradually increases.

7. The laboratory exhaust extraction device of claim 4, wherein, The flange is provided with a limiting protrusion at the farthest end away from the limiting return edge, and the distance between the limiting protrusion and the inner wall of the connecting barrel is less than the thickness of the limiting edge plate.

8. The laboratory exhaust extraction device of claim 1, wherein, The movable pipe group includes at least two connecting pipes arranged at an angle to each other, the ends of the fixed pipe and the two connecting pipes are respectively connected by connecting shafts, and the two connecting pipes can rotate around the axis of the connecting shafts to adjust the position and angle of the exhaust hood.

Images