Laboratory smoke exhaust ventilation pipe

Abstract

The utility model relates to the technical field of smoke exhaust and ventilation, and discloses a laboratory smoke exhaust and ventilation pipe which comprises a smoke exhaust pipe, an exhaust fan used for exhausting smoke is arranged on the right side of the inner wall of the smoke exhaust pipe, a fixing block is fixedly connected to the front end of the smoke exhaust pipe, and the right end of the fixing block is connected with a tenon through a clamping assembly. The outer wall of the tenon is connected with a fixing strip in a sliding mode, the fixing strip is connected to the inner wall of the smoke exhaust pipe in a sliding mode, the rear end of the fixing strip is connected with a filter screen used for filtering smoke through a mounting piece, and the left end of the smoke exhaust pipe is rotationally connected with a first connecting pipe used for conveying the smoke. According to the smoke exhaust device, the pull rod is pulled to enable the sliding rod to drive the tenon to move, the tenon is disengaged from clamping of the fixing strip, then the fixing strip is pulled out of the smoke exhaust pipe, the filter screen can be detached from the smoke exhaust pipe, the second rotary disc and the first rotary disc can rotate mutually under the action of the connecting ring, and the flow guide cover can move.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust and ventilation technology, and in particular to a laboratory smoke exhaust and ventilation duct. Background Technology

[0002] In various laboratories, whether for chemical, biological, or physical experiments, harmful fumes, gases, and particulate matter are often generated. To ensure the health and safety of laboratory personnel, maintain good air quality, and meet environmental protection requirements, laboratory exhaust ventilation ducts have become an indispensable part of laboratory infrastructure. They can effectively and promptly expel harmful waste gases generated during experiments outdoors, preventing their accumulation indoors and potential harm to personnel and equipment.

[0003] Existing laboratory smoke exhaust ducts typically only have a simple smoke exhaust function, and their internal filters are mostly fixed and non-removable. After prolonged use, the filters are easily clogged by smoke and dust, and the pores become smaller. This is because the smoke generated in experiments contains a large amount of dust, impurities, and solid particles generated by chemical reactions, which gradually adhere to the filter. As the degree of filter clogging increases, the airflow resistance of the ventilation duct increases significantly. On the one hand, this reduces the smoke exhaust efficiency of the ventilation duct, causing smoke to not be discharged in time, resulting in a smoky atmosphere in the laboratory, affecting the visibility and operating environment of the experimenters, and may even interfere with the accuracy of experimental results. To address this technical problem, this application proposes a laboratory smoke exhaust duct. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a laboratory smoke exhaust ventilation pipe. Pulling the pull rod causes the slide rod to move the tenon, so that the tenon is disengaged from the fixing strip. Then the fixing strip is pulled out from the smoke exhaust pipe, and the filter screen can be removed from the smoke exhaust pipe. Turntable 2 and turntable 1 can rotate relative to each other under the action of the connecting ring, which can move the guide hood.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A laboratory smoke exhaust ventilation duct includes a smoke exhaust pipe for exhausting smoke. An exhaust fan for drawing out smoke is installed on the right side of the inner wall of the smoke exhaust pipe. A fixing block is fixedly connected to the front end of the smoke exhaust pipe. A tenon is connected to the right end of the fixing block via a locking assembly. A fixing strip is slidably connected to the outer wall of the tenon. The fixing strip is slidably connected to the inner wall of the smoke exhaust pipe. A filter screen for filtering smoke is connected to the rear end of the fixing strip via an installation component. A connecting pipe one for transmitting smoke is rotatably connected to the left end of the smoke exhaust pipe. A connecting pipe two for transmitting smoke is connected to the left end of the connecting pipe one via an adjustment assembly. A connecting pipe three for transmitting smoke is also connected to the left end of the connecting pipe two via an adjustment assembly. A guide hood for centralized smoke exhaust is fixedly connected to the bottom end of the connecting pipe three.

[0007] Furthermore, the engaging assembly includes a pull rod located at the right end of the fixing block, a slide rod fixedly connected to the left end of the pull rod, the slide rod slidably connected to the inner wall of the fixing block, the slide rod fixedly connected to the right end of the tenon, and a spring provided on the outer wall of the slide rod.

[0008] Furthermore, one of the adjustment components includes a turntable 1 located at the left end of the connecting pipe 1, a connecting ring rotatably connected to the left end of the turntable 1, a turntable 2 rotatably connected to the left end of the connecting ring, and the turntable 2 being disposed at the right end of the connecting pipe 2.

[0009] Furthermore, one end of the spring is located at the right end of the tenon, and the other end of the spring is located on the inner wall of the fixing block.

[0010] Furthermore, rubber rings are provided at the connection points between turntable 2 and turntable 1, and at the connection points between connecting pipe 1 and exhaust pipe 2.

[0011] Furthermore, a rubber ring is provided on the rear side of the outer wall of the fixing strip, and the rubber ring is provided on the inner wall of the exhaust pipe.

[0012] Furthermore, a tenon is fixedly connected to the rear end of the fixing strip, and the tenon is slidably connected to the front end of the filter screen.

[0013] Furthermore, a handle is fixedly connected to the top of the air deflector.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, pulling the pull rod causes the slide rod to move the tenon, causing the tenon to disengage from the fixing strip. Then, the fixing strip is pulled out from the exhaust pipe, which allows the filter screen to be removed from the exhaust pipe. This allows the filter screen to be cleaned or replaced, preventing smoke and dust from clogging the pores of the filter screen and increasing the airflow resistance of the ventilation pipe. This ensures that the ventilation pipe can effectively filter various harmful substances and guarantees the normal operation of the ventilation system.

[0016] 2. In this utility model, turntable two and turntable one can rotate relative to each other under the action of the connecting ring, which can move the flow guide and adjust the position of the flow guide, so that the flow guide can be aimed at the source of smoke generation at a closer distance, and the smoke can be collected more efficiently, preventing the smoke from spreading in the laboratory, thereby improving the smoking efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of a laboratory smoke exhaust ventilation duct proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the filter plate structure of a laboratory smoke exhaust ventilation duct proposed in this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A;

[0020] Figure 4 This is a schematic diagram of the connecting ring structure of a laboratory smoke exhaust ventilation duct proposed in this utility model.

[0021] Legend:

[0022] 1. Exhaust pipe; 2. Exhaust fan; 3. Fixing block; 4. Sliding rod; 5. Tenon; 6. Pull rod; 7. Spring; 8. Fixing strip; 9. Tenon; 10. Filter screen; 11. Rubber ring one; 12. Connecting pipe one; 13. Turntable one; 14. Connecting ring; 15. Turntable two; 16. Rubber ring two; 17. Connecting pipe two; 18. Connecting pipe three; 19. Deflector; 20. Handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-3This utility model provides an embodiment of a laboratory smoke exhaust ventilation pipe, comprising a smoke exhaust pipe 1 for smoke exhaust, an exhaust fan 2 for smoke extraction on the right side of the inner wall of the smoke exhaust pipe 1, a fixing block 3 fixedly connected to the front end of the smoke exhaust pipe 1, a pull rod 6 provided at the right end of the fixing block 3, a sliding rod 4 fixedly connected to the left end of the pull rod 6, the sliding rod 4 being slidably connected to the inner wall of the fixing block 3, a tenon 5 fixedly connected to the left end of the sliding rod 4, a spring 7 provided on the outer wall of the sliding rod 4, and a fixing strip 8 slidably connected to the outer wall of the tenon 5, the fixing strip 8 being slidably connected to the exhaust fan 2. The inner wall of the flue pipe 1 has a filter screen 10 for filtering the flue gas connected to the rear end of the fixing strip 8 via an installation component. The left end of the flue pipe 1 is rotatably connected to a connecting pipe 12 for transmitting flue gas. The left end of the connecting pipe 12 is connected to a connecting pipe 17 for transmitting flue gas via a turntable 13, a connecting ring 14, and a turntable 15. The left end of the connecting pipe 17 is also connected to a connecting pipe 18 for transmitting flue gas via a turntable 13, a connecting ring 14, and a turntable 15. The bottom end of the connecting pipe 18 is fixedly connected to a guide hood 19 for centralized flue gas exhaust.

[0025] Specifically, by setting up the filter screen 10, the smoke in the laboratory can be prevented from damaging the exhaust fan 2. After the filter screen 10 has been used for a period of time, pinch the pull rod 6 and pull it, which will cause the slide rod 4 to move the tenon 5, so that the tenon 5 is disengaged from the fixing strip 8. Then, pull the fixing strip 8 out of the smoke exhaust pipe 1, so that the filter screen 10 can be removed from the smoke exhaust pipe 1, thereby cleaning or replacing the filter screen 10, preventing smoke and dust from clogging the pores of the filter screen 10, which would increase the airflow resistance of the ventilation pipe, and thus ensure that the ventilation pipe can effectively filter various harmful substances and ensure the normal operation of the ventilation system. After cleaning or replacing the filter screen 10, pull the pull rod 6 to move the tenon 5, and then install the filter screen 10 into the smoke exhaust pipe 1 through the fixing strip 8. Then, release the force applied to the pull rod 6, and under the action of the spring 7, the tenon 5 will spring into the slot of the fixing strip 8, limiting the fixing strip 8. In addition to extracting smoke, starting the exhaust fan 2 can also ventilate the indoor environment when there is no smoke.

[0026] Reference Figure 1 , Figure 2 and Figure 4 The turntable 13 is located at the left end of the connecting pipe 12. The left end of the turntable 13 is rotatably connected to the connecting ring 14. The left end of the connecting ring 14 is rotatably connected to the turntable 2 15. The turntable 2 15 is located at the right end of the connecting pipe 2 17. One end of the spring 7 is located at the right end of the tenon 5. The other end of the spring 7 is located on the inner wall of the fixing block 3. Rubber rings 2 16 are provided at the connection points of the turntable 2 15 and the turntable 13 with the connection points of the connecting pipe 12 and the exhaust pipe 1. Rubber ring 11 is provided on the rear side of the outer wall of the fixing strip 8. Rubber ring 11 is located on the inner wall of the exhaust pipe 1. The rear end of the fixing strip 8 is fixedly connected to the tenon 9. The tenon 9 is slidably connected to the front end of the filter screen 10. The top of the guide hood 19 is fixedly connected to the handle 20.

[0027] Specifically, turntable 2 15 and turntable 13 can rotate relative to each other under the action of connecting ring 14, which can move the guide hood 19 and adjust the position of the guide hood 19 so that the guide hood 19 can be aimed closer to the source of smoke generation, collect smoke more efficiently, prevent smoke from spreading in the laboratory, and thus improve smoke extraction efficiency. Under the action of rubber ring 2 16, smoke can be prevented from leaking from the connection. Under the action of rubber ring 11, smoke can be prevented from leaking from the connection between the fixing strip 8 and the exhaust pipe 1. The position of the guide hood 19 can be adjusted more conveniently through handle 20.

[0028] Working principle: After the exhaust ventilation duct is installed, when an experiment is being conducted in the laboratory, the exhaust fan 2 is turned on to exhaust the smoke. The smoke will pass through the guide hood 19, connecting pipe three 18, connecting pipe two 17, and connecting pipe one 12 in sequence and finally be discharged from the exhaust pipe 1. When exhausting the smoke in the laboratory, you can hold the handle 20 and, with the help of the connecting ring 14, turntable one 13 and turntable two 15 can rotate relative to each other, thereby driving the guide hood 19 to move, so that it can be aimed at the source of smoke more closely. If the filter screen 10 has accumulated a lot of dirt after a period of use, you can pinch the pull rod 6 and pull it to make the slide rod 4 drive the tenon 5 to move, thereby releasing the tenon 5 from the fixing strip 8. Then, pull the fixing strip 8 out of the exhaust pipe 1, and the filter screen 10 can be removed for cleaning or replacement.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 laboratory smoke exhaust ventilation duct, characterized in that: The system includes a smoke exhaust pipe (1) for exhausting smoke. A fan (2) for extracting smoke is provided on the right side of the inner wall of the smoke exhaust pipe (1). A fixing block (3) is fixedly connected to the front end of the smoke exhaust pipe (1). A tenon (5) is connected to the right end of the fixing block (3) through a snap-fit ​​assembly. A fixing strip (8) is slidably connected to the outer wall of the tenon (5). The fixing strip (8) is slidably connected to the inner wall of the smoke exhaust pipe (1). A filter screen (10) for filtering smoke is connected to the rear end of the fixing strip (8) through an installation component. A connecting pipe (12) for transmitting smoke is rotatably connected to the left end of the smoke exhaust pipe (1). A connecting pipe (17) for transmitting smoke is connected to the left end of the connecting pipe (12) through an adjustment assembly. A connecting pipe (18) for transmitting smoke is also connected to the left end of the connecting pipe (17) through an adjustment assembly. A guide hood (19) for centralized smoke exhaust is fixedly connected to the bottom end of the connecting pipe (18).

2. The laboratory smoke exhaust ventilation duct according to claim 1, characterized in that: The engaging assembly includes a pull rod (6) located at the right end of the fixed block (3), a slide rod (4) fixedly connected to the left end of the pull rod (6), the slide rod (4) being slidably connected to the inner wall of the fixed block (3), the slide rod (4) being fixedly connected to the right end of the tenon (5), and a spring (7) being provided on the outer wall of the slide rod (4).

3. A laboratory smoke exhaust ventilation duct according to claim 1, characterized in that: One of the adjustment components includes a turntable (13) located at the left end of the connecting pipe (12), a connecting ring (14) is rotatably connected to the left end of the turntable (13), a turntable (15) is rotatably connected to the left end of the connecting ring (14), and the turntable (15) is located at the right end of the connecting pipe (17).

4. A laboratory smoke exhaust ventilation duct according to claim 2, characterized in that: One end of the spring (7) is located at the right end of the tenon (5), and the other end of the spring (7) is located on the inner wall of the fixing block (3).

5. A laboratory smoke exhaust ventilation duct according to claim 3, characterized in that: Rubber rings (16) are provided at the connection points of turntable 2 (15) and turntable 1 (13) with connection points of connecting pipe 1 (12) and exhaust pipe (1).

6. A laboratory smoke exhaust ventilation duct according to claim 1, characterized in that: A rubber ring (11) is provided on the rear side of the outer wall of the fixing strip (8), and the rubber ring (11) is provided on the inner wall of the exhaust pipe (1).

7. A laboratory smoke exhaust ventilation duct according to claim 1, characterized in that: The rear end of the fixing strip (8) is fixedly connected to a tenon strip (9), and the tenon strip (9) is slidably connected to the front end of the filter screen (10).

8. A laboratory smoke exhaust ventilation duct according to claim 1, characterized in that: A handle (20) is fixedly connected to the top of the flow guide (19).

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