Ventilation and exhaust device for physicochemical laboratory

Abstract

The utility model discloses a ventilation and exhaust device for a physicochemical laboratory, and relates to the technical field of ventilation and exhaust of laboratories, the ventilation and exhaust device for the physicochemical laboratory comprises a ventilation cabinet installed in the physicochemical laboratory, the right side surface of the ventilation cabinet is fixedly connected with a first transmission pipe, and the right side of the first transmission pipe is provided with a concentration box; a conical collecting pipe is fixedly connected to the surface of the left side of the concentrating box and communicates with the interior of the concentrating box and the interior of the first conveying pipe, a guide plate can be driven by means of an adjusting assembly to move, and therefore an air flowing channel is controlled by means of the guide plate; according to the air exhaust device, the more appropriate filtering assembly can be selected according to the composition of harmful factors in air, damage to the activated carbon filtering assembly caused by part of substances is avoided, the applicability of the whole air exhaust device is improved, and the sealing performance can be improved through the L-shaped sealing plate after the guide plate rotates.

Description

TECHNICAL FIELD

[0001] The utility model relates to laboratory ventilation technology field especially relates to a ventilation device for physical and chemical laboratory. BACKGROUND

[0002] The physical and chemical laboratory is a place specially used for carrying out physical and chemical experiments, which provides researchers and students with an environment and equipment for various experimental operations.

[0003] In the physical and chemical laboratory, experiments such as analysis, synthesis, and performance testing of substances can be carried out. The laboratory is usually equipped with various experimental instruments and equipment. Harmful gases, vapors, or particulate matter may be generated during experiments in the physical and chemical laboratory. Therefore, an exhaust system is an important part of laboratory safety.

[0004] For example, the Chinese utility model patent with the patent publication number CN215918579U includes a shell and a panel, the front of the shell is installed with the panel, the back of the shell is installed with a filter cartridge, the inside of the filter cartridge is installed with a first filter layer, the inside of the filter cartridge is installed with a second filter layer, and the front of the panel is installed with a plurality of baffles through a shaft.

[0005] The patent can install a first filter layer and a second filter layer in the filter cartridge. The first filter layer is fixed inside the filter cartridge. When the gas enters the inside of the first filter layer through the filter cartridge, the first filter layer blocks dust and large particles in the gas and performs primary filtration on the gas. The second filter layer is made of activated carbon, which has good adsorption properties. When the primary filtered gas enters the inside of the second filter layer, the activated carbon particles adsorb residual chemicals in the gas to prevent pollution caused by chemical emissions to the external environment. However, strong oxidizing substances may be generated during redox reaction experiments or metal corrosion and protection experiments, which can easily cause oxidation of activated carbon and reduce its adsorption capacity, thereby reducing its filtration effect. In view of this, we propose a ventilation device for physical and chemical laboratories. SUMMARY

[0006] The utility model aims to provide a ventilation device for physical and chemical laboratories to solve the problems raised in the background.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a kind of physical chemistry laboratory ventilation and exhaust device, including ventilation cabinet being installed in physical chemistry laboratory, the right side surface of the ventilation cabinet is fixedly connected with first transmission pipe, the right side of the first transmission pipe is provided with concentration box, the left side surface of the concentration box is fixedly connected with conical collecting pipe, the conical collecting pipe is communicated with the inside of concentration box and first transmission pipe respectively, the surface of the physical chemistry laboratory is fixedly connected with second transmission pipe, the inside of concentration box is communicated with the second transmission pipe, the inner wall of the first transmission pipe is fixedly connected with baffle, the upper side surface of the baffle is fixedly connected with activated carbon filter assembly, the lower side of the baffle is fixedly connected with molecular sieve filter assembly, the upper and lower side surfaces of the baffle are fixedly connected with L-shaped closing plate respectively, the right side surface of the baffle is fixedly connected with connecting plate, the right side surface of the connecting plate is fixedly connected with connecting shaft, the outer surface of the connecting shaft is rotatably provided with two connecting barrels, guiding plate is fixedly connected between the two connecting barrels, and adjusting assembly is arranged on the guiding plate.

[0008] Preferably, the adjusting assembly includes two first mounting plates, both of which are fixedly connected to the lower side surface of the guiding plate, and the bottom wall of the first transmission pipe is fixedly connected with two second mounting plates, and the two second mounting plates are rotatably connected with an electric telescopic rod.

[0009] Preferably, the upper end of the electric telescopic rod is rotatably connected between the two first mounting plates, the outer surface of the guiding plate is inclined, and the inner wall of the ventilation cabinet is slidably connected with two first filter plates.

[0010] Preferably, the front side surface of the first filter plate slidably penetrates the front side surface of the ventilation cabinet, the front side surface of the first filter plate is fixedly connected with a sealing plate, and the rear side surface of the sealing plate is fixedly connected with a sealing frame.

[0011] Preferably, the front side surface of the ventilation cabinet is provided with a sealing groove matched with the sealing frame, the front side surface of the sealing plate is fixedly connected with a control handle, and the bottom wall of the ventilation cabinet is fixedly connected with a flow guide block.

[0012] Preferably, the flow guide block is triangular, the top wall of the ventilation cabinet is fixedly connected with a third mounting plate, and the lower side surface of the third mounting plate is fixedly connected with an atomizing nozzle.

[0013] Preferably, the second filter plate is slidably connected between the left side surface of the flow guide block and the inner wall of the ventilation cabinet, and the front side surface of the second filter plate also slidably penetrates the front side surface of the ventilation cabinet.

[0014] Preferably, the upper side surface of the ventilation cabinet is provided with a pump body, the output end of the pump body is communicated with the atomizing nozzle, and the input end of the pump body is communicated with the inside of the ventilation cabinet.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This physical and chemical laboratory ventilation device can drive the guide plate to move by adjusting the component, thereby controlling the air flow channel by the guide plate. It can select more suitable filter components according to the composition of harmful factors in the air, avoid damage to the activated carbon filter components by some substances, improve the applicability of the overall ventilation device, and improve the sealing performance by using the L-shaped sealing plate after the guide plate rotates.

[0017] 2. The ventilation system of this physical and chemical laboratory can further remove fine particles in the air through the setting of atomizing nozzles, thereby improving the quality of the filtered air. After the first filter plate has been used for a long time, it can be easily pulled out by the control handle, and the first filter plate can be cleaned or replaced to restore its performance. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of a ventilation device for a physical and chemical laboratory according to the present invention;

[0020] Figure 2 This is a cross-sectional view of the fume hood of this utility model;

[0021] Figure 3 This is a schematic diagram of the sealing frame of this utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of the first transmission tube of this utility model;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0024] Reference numerals: 1. Fume hood; 2. First transfer pipe; 3. Centralized collection box; 4. Conical collection pipe; 5. Second transfer pipe; 6. Baffle; 7. Activated carbon filter assembly; 8. Molecular sieve filter assembly;

[0025] 10. L-shaped enclosed plate; 11. Connecting plate; 12. Connecting shaft; 13. Connecting cylinder; 14. Guide plate; 15. First mounting plate; 16. Second mounting plate; 17. Electric telescopic rod;

[0026] 17. Sealing frame; 18. Control handle; 19. Flow guide block; 20. Third mounting plate; 21. Atomizing nozzle; 22. Second filter plate; 23. Pump body; 24. First filter plate; 25. Sealing plate; 26. Physical and chemical laboratory. Detailed Implementation

[0027] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0028] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a kind of physical chemistry laboratory ventilation and exhaust device, including the ventilation cabinet 1 being installed in physical chemistry laboratory 26, the right side surface of ventilation cabinet 1 is fixedly connected with the first transmission pipe 2 for air transmission, the right side of first transmission pipe 2 is provided with the concentration box 3 for concentrating and transmission of air, the left side surface of concentration box 3 is fixedly connected with the conical collecting pipe 4 for collecting and guiding air circulation, conical collecting pipe 4 is communicated with the inside of concentration box 3 and first transmission pipe 2 respectively, the surface of physical chemistry laboratory 26 is fixedly connected with the second transmission pipe 5 for conducting air in physical chemistry laboratory 26 to the inside of concentration box 3, second transmission pipe 5 is communicated with the inside of concentration box 3, air in physical chemistry laboratory 26 enters the inside of concentration box 3 by second transmission pipe 5, then enters the inside of first transmission pipe 2 by conical collecting pipe 4, the inner wall of first transmission pipe 2 is fixedly connected with the baffle 6 for dividing first transmission pipe 2 into two parts, the upper side surface of baffle 6 is fixedly connected with the activated carbon filter assembly 7 for filtering air, the lower side of baffle 6 is fixedly connected with the molecular sieve filter assembly 8 also for filtering air, under the flow guiding effect of guide plate 13, gas enters the lower side of baffle 6, and then air is filtered by molecular sieve filter assembly 8.

[0029] The upper and lower side surfaces of baffle 6 are fixedly connected with L-shaped closing plate 9 for improving sealing performance respectively, the right side surface of baffle 6 is fixedly connected with connecting plate 10 for structural installation and connection, the right side surface of connecting plate 10 is fixedly connected with connecting shaft 11 for structural installation, two connecting barrels 12 for structural connection are rotatably sleeved on the outer surface of connecting shaft 11, guide plate 13 for guiding air circulation to above or below baffle 6 is fixedly connected between two connecting barrels 12, adjusting assembly is arranged on guide plate 13, guide plate 13 can be driven to move by adjusting assembly, so as to control the flow channel of air by guide plate 13, more suitable filter assembly can be selected according to the composition of harmful factors in air, to avoid damage to activated carbon filter assembly 7 by part of substances, improve the applicability of the whole exhaust device, and the sealing performance can be improved by L-shaped closing plate 9 after guide plate 13 rotates.

[0030] The adjusting assembly comprises two first mounting plates 14 for structural mounting, both of which are fixedly connected to the lower side surface of the guide plate 13, the bottom wall of the first conveying pipe 2 is fixedly connected with two second mounting plates 15 also for structural mounting, a motorized telescopic rod 16 for driving the guide plate 13 to move is rotatably connected between the two second mounting plates 15, the guide plate 13 rotates around the connecting shaft 11 driven by the motorized telescopic rod 16, the lower side surface of the rotating shaft of the guide plate 13 is in contact with the lower side L-shaped sealing plate 9, so that the air enters the upper side of the partition plate 6 through the guide plate 13, the upper end of the motorized telescopic rod 16 is rotatably connected between the two first mounting plates 14, the outer surface of the guide plate 13 is arranged in an inclined manner, the inner wall of the fume hood 1 is slidably connected with two first filter plates 24 for filtering, the front side surface of the first filter plate 24 slidably penetrates out of the front side surface of the fume hood 1, and the front side surface of the first filter plate 24 is fixedly connected with a sealing plate 25 for improving the sealing performance of the first filter plate 24 and the fume hood 1.

[0031] The rear side surface of the sealing plate 25 is fixedly connected with a sealing frame 17 for further improving the sealing performance of the fume hood 1, the front side surface of the fume hood 1 is provided with a sealing groove matched with the sealing frame 17, the front side surface of the sealing plate 25 is fixedly connected with a control handle 18 for conveniently pulling out the first filter plate 24 by a user, the bottom wall of the fume hood 1 is fixedly connected with a flow guide block 19 for guiding air circulation, the flow guide block 19 is arranged in a triangular shape, the top wall of the fume hood 1 is fixedly connected with a third mounting plate 20 for structural mounting and water flow transmission, the lower side surface of the third mounting plate 20 is fixedly connected with an atomizing nozzle 21 for atomizing and spraying water mist, so as to adsorb particles in the air, the filtered air also enters the inside of the fume hood 1, after entering, the air is filtered by the two first filter plates 24 and guided by the flow guide block 19 to enter below the atomizing nozzle 21, and the left side surface of the flow guide block 19 is slidably connected with a second filter plate 22 between the inner wall of the fume hood 1 for separating impurities in water.

[0032] The front side surface of the second filter plate 22 also slidably penetrates out of the front side surface of the fume hood 1, the upper side surface of the fume hood 1 is provided with a pump body 23 for driving water flow to move, the pump body 23 guides the water flow to the inside of the atomizing nozzle 21 and sprays out after being pressurized and atomized by the atomizing nozzle, the fine particles in the air are removed by the water mist, the output end of the pump body 23 is communicated with the atomizing nozzle 21, the input end of the pump body 23 is communicated with the inside of the fume hood 1, the setting of the atomizing nozzle 21 can further remove the fine particles in the air, improve the quality of the filtered air, and after the first filter plate 24 is used for a long time, it can be conveniently pulled out by the control handle 18, and the first filter plate 24 can be cleaned or replaced to restore the performance.

[0033] Working principle: the air in the physicochemical laboratory 26 enters the inside of the centralized box 3 through the second transmission pipe 5, then enters the inside of the first transmission pipe 2 through the conical collecting pipe 4, at this time if it is strong oxidizing substance, the guide plate 13 remains stationary, under the guide of the guide plate 13, the gas enters the lower side of the partition plate 6, then the air is filtered by the molecular sieve filtering assembly 8, the filtered air enters the inside of the fume hood 1 for secondary filtration, when the discharged air does not contain strong oxidizing substance, then the guide plate 13 is driven to rotate around the connecting shaft 11 by the electric telescopic rod 16, the lower side surface of the rotating shaft of the guide plate 13 contacts with the lower side L-shaped closing plate 9, so that the air enters the upper side of the partition plate 6 through the guide plate 13, at this time the air is filtered by the activated carbon plate, the filtered air also enters the inside of the fume hood 1, after the air enters, the air is filtered by two first filter plates 24 and is guided by the flow guide block 19 to enter the lower side of the atomizing nozzle 21, the water flow is guided to the inside of the atomizing nozzle 21 by the pump body 23 and is sprayed after the pressurized atomization of the atomizing nozzle, the small particles in the air are removed by the water mist.

[0034] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, within the knowledge range possessed by the ordinary skill in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A chemical laboratory ventilation device, comprising a fume hood (1) installed in a chemical laboratory (26), characterized in that: The right side surface of the fume chamber (1) is fixedly connected with a first conveying pipe (2), the right side of the first conveying pipe (2) is provided with a concentration box (3), the left side surface of the concentration box (3) is fixedly connected with a conical collecting pipe (4), the conical collecting pipe (4) is communicated with the interiors of the concentration box (3) and the first conveying pipe (2) respectively, the surface of the physical and chemical laboratory (26) is fixedly connected with a second conveying pipe (5), the second conveying pipe (5) is communicated with the interior of the concentration box (3), the inner wall of the first conveying pipe (2) is fixedly connected with a partition plate (6), the upper side surface of the partition plate (6) is fixedly connected with an activated carbon filtering assembly (7), the lower side of the partition plate (6) is fixedly connected with a molecular sieve filtering assembly (8), the upper and lower side surfaces of the partition plate (6) are fixedly connected with L-shaped sealing plates (9) respectively, the right side surface of the partition plate (6) is fixedly connected with a connecting plate (10), the right side surface of the connecting plate (10) is fixedly connected with a connecting shaft (11), the outer surface of the connecting shaft (11) is rotatably sleeved with two connecting barrels (12), the two connecting barrels (12) are fixedly connected with a guide plate (13), and the guide plate (13) is provided with an adjusting assembly.

2. The physical and chemical laboratory air exhaust device according to claim 1, characterized in that: The adjusting assembly comprises two first mounting plates (14), both of which are fixedly connected to the lower side surface of the guide plate (13), and the bottom wall of the first conveying pipe (2) is fixedly connected with two second mounting plates (15), and the two second mounting plates (15) are rotatably connected with an electric telescopic rod (16).

3. The physical and chemical laboratory air exhaust device according to claim 2, characterized in that: The upper end of the electric telescopic rod (16) is rotatably connected between the two first mounting plates (14), the outer surface of the guide plate (13) is inclined, and the inner wall of the fume chamber (1) is slidably connected with two first filtering plates (24).

4. The physical and chemical laboratory air exhaust device according to claim 3, characterized in that: The front side surface of the first filtering plate (24) slidably penetrates out of the front side surface of the fume chamber (1), the front side surface of the first filtering plate (24) is fixedly connected with a sealing plate (25), and the rear side surface of the sealing plate (25) is fixedly connected with a sealing frame (17).

5. The physical and chemical laboratory air exhaust device according to claim 4, characterized in that: The front side surface of the fume chamber (1) is provided with a sealing groove matched with the sealing frame (17), the front side surface of the sealing plate (25) is fixedly connected with a control handle (18), and the bottom wall of the fume chamber (1) is fixedly connected with a flow guide block (19).

6. The physical and chemical laboratory air exhaust device according to claim 5, characterized in that: The flow guide block (19) is triangular, the top wall of the fume chamber (1) is fixedly connected with a third mounting plate (20), and the lower side surface of the third mounting plate (20) is fixedly connected with an atomizing nozzle (21).

7. The physical and chemical laboratory air exhaust device according to claim 6, characterized in that: The left side surface of the flow guide block (19) is slidably connected with a second filtering plate (22) between the inner wall of the fume chamber (1), and the front side surface of the second filtering plate (22) also slidably penetrates out of the front side surface of the fume chamber (1).

8. The physical and chemical laboratory air exhaust device according to claim 7, characterized in that: The upper side surface of the fume chamber (1) is provided with a pump body (23), the output end of the pump body (23) is communicated with the atomizing nozzle (21), and the input end of the pump body (23) is communicated with the interior of the fume chamber (1).

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