Waste gas treatment device for laboratory fume hood

Abstract

The invention provides a waste gas treatment device for a laboratory fume hood, and belongs to the technical field of waste gas treatment.The waste gas treatment device comprises an adsorption mechanism, a connecting mechanism, a filtering mechanism and a spraying mechanism, the adsorption mechanism comprises an adsorption box, an adsorption bin is formed in the adsorption box, and a positioning shaft is fixedly installed at the center of the bottom end of the adsorption bin; and the top end of the positioning shaft is rotationally connected with an adsorption cylinder, the top end of the adsorption cylinder is in transmission connection with a first driving assembly, and an adsorption box cover is movably installed on the upper surface of the adsorption box. The connecting mechanism comprises connecting frames arranged on the left side and the right side of the adsorption box, the interiors of the connecting frames are hollow, connecting grooves are symmetrically formed in the left side and the right side of each connecting frame, and clamping assemblies are arranged at the top ends of the two connecting grooves. The problems that an existing laboratory fume hood waste gas treatment device is fixed in structure, inflexible in module combination and inconvenient to maintain and clean are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly to a waste gas treatment device for a laboratory fume hood. Background Art

[0002] A laboratory fume hood is an important device for ensuring the safety of laboratory personnel. Its core function is to guide and discharge the toxic and harmful waste gas generated during the experiment through forced ventilation to prevent it from spreading in the laboratory. To prevent pollutants from being directly discharged into the atmosphere and affecting the environment, fume hoods are often equipped with waste gas treatment devices for purifying the discharged gas. Existing waste gas treatment technologies mainly include physical filtration, activated carbon adsorption, wet spray neutralization, photocatalytic decomposition, etc. Usually, multiple purification functions are integrated into a treatment box through a fixed structure, so that the waste gas can pass through multiple treatment steps such as pre-filtration, adsorption, and liquid washing in sequence, thereby achieving the purpose of multi-stage purification.

[0003] However, taking the "Waste Gas Treatment Equipment for a Laboratory Fume Hood" with the patent publication number CN119607778A as an example, although this device integrates a filtration device, an adsorption device, and a dust removal device in terms of structure to form a complete multi-stage purification path, its structure is a fixed integrated design and has multiple technical defects. First, it is impossible to flexibly adjust the combination of treatment modules according to different experimental types or waste gas components. For example, when only particulate matter filtration is required during the experiment, users cannot skip the adsorption or spray treatment, resulting in unnecessary energy consumption waste. Second, each module is tightly integrated in the treatment box, and it is impossible to achieve quick disassembly and independent cleaning. The maintenance work is cumbersome, time-consuming, and prone to cross-contamination. In addition, the fixed structure also limits the adaptability of this device in different experimental scenarios and is not conducive to popularization and application. In summary, there is still significant room for improvement in the structural flexibility and maintenance convenience of existing waste gas treatment devices. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is that the structure of the existing waste gas treatment device for a laboratory fume hood is fixed, it is difficult to flexibly combine treatment modules according to requirements, and it is inconvenient to maintain and clean, which limits its adaptability and use efficiency.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: An exhaust gas treatment device for a laboratory fume hood, including,

[0008] An adsorption mechanism, including an adsorption box. An adsorption chamber is provided inside the adsorption box. A positioning shaft is fixedly installed at the center of the bottom end of the adsorption chamber. The top end of the positioning shaft is rotatably connected to an adsorption cylinder. The top end of the adsorption cylinder is drivingly connected to a first driving component. An adsorption box cover is movably installed on the upper surface of the adsorption box;

[0009] A connection mechanism, including connection frames provided on the left and right sides of the adsorption box. The inside of the connection frame is hollow. Connection slots are symmetrically provided on the left and right sides of the connection frame. Clamping components are provided at the top ends of the two connection slots;

[0010] A filtering mechanism, including a filtering box provided on the right side of the adsorption box. A filtering chamber is provided inside the filtering box. A collection box is slidably connected to the bottom end of the filtering chamber. A filter plate is slidably connected to the center of the inside of the collection box. A moving frame is provided on the outside of the top end of the filter plate. A second driving component is provided on the left side of the moving frame. A filter box cover is movably installed on the upper surface of the filtering box; and,

[0011] A spraying mechanism, including a spraying box provided on the left side of the adsorption box. A spraying chamber is provided inside the spraying box. A collection frame is movably installed at the bottom end of the inside of the spraying chamber. A spraying box cover is movably installed on the upper surface of the spraying chamber. A spraying component is movably installed in the middle of the spraying box cover.

[0012] As a preferred solution of the exhaust gas treatment device for the laboratory fume hood of the present invention, wherein: Connection blocks are fixedly installed at the openings at the left and right ends of the adsorption box, the filtering box, and the spraying box, and the connection blocks are inserted into the connection slots.

[0013] As a preferred solution of the exhaust gas treatment device for the laboratory fume hood of the present invention, wherein: A positioning groove is provided at the top end of the connection block. The clamping component includes a positioning block inserted into the positioning groove. The top end of the positioning block penetrates through the connection frame and extends to the outside and is fixedly connected to a first handle. Telescopic springs are symmetrically installed on the front and rear sides of the bottom end of the first handle, and the bottom ends of the two telescopic springs are fixedly connected to the inner wall of the connection frame.

[0014] As a preferred solution of the exhaust gas treatment device for the laboratory fume hood of the present invention, wherein: Slopes are provided on the upper sides of the ends of the plurality of connection blocks close to the connection frame. There is a certain gap between the bottom end of the positioning block and the bottom wall of the connection slot.

[0015] As a preferred solution of the waste gas treatment device for the laboratory fume hood described in the present invention, the left end of the spray box is connected to the exhaust pipe through a connecting mechanism, the right end of the spray box is connected to the adsorption box through a connecting mechanism, the right end of the adsorption box is connected to the filter box through a connecting mechanism, and the right end of the filter box is connected to the air inlet pipe through a connecting mechanism.

[0016] As a preferred solution of the waste gas treatment device for laboratory fume hoods described in the present invention, the adsorption box cover, the filter box cover and the spray box cover are movably connected to the upper surfaces of the three groups of boxes respectively by bolts.

[0017] As a preferred solution of the waste gas treatment device for the laboratory fume hood of the present invention, the adsorption cylinder includes a cylinder body, and the bottom of the cylinder body is rotatably connected to the positioning shaft, the interior of the cylinder body can be filled with activated carbon adsorption material, the outer surface of the cylinder body is provided with a first through hole, the top of the cylinder body is movably installed with a sealing cover, and the top of the sealing cover is rotatably connected to the bottom wall of the adsorption box cover, and a cross slot is provided at the center of the top of the sealing cover;

[0018] The first driving assembly includes a first servo motor movably connected to the center of the top end of the adsorption box cover, the output end of the first servo motor is connected to the first rotating shaft through a coupling, and the bottom end of the first rotating shaft passes through the adsorption box cover and is inserted into the cross slot, and the first rotating shaft is rotatably connected to the inner wall of the adsorption box cover through a bearing.

[0019] As a preferred solution of the exhaust gas treatment device for the laboratory fume hood described in the present invention, fixed rods are symmetrically installed on the left and right sides of the top wall of the filter bin, the movable frame is slidably connected between the two fixed rods, a clamping groove is provided at the bottom of the movable frame, and the top of the filter plate is slidably connected in the clamping groove, a second handle is fixedly installed at the center of the upper surface of the filter plate, a through groove is provided between the second handle and the filter plate, and the cross-section of the through groove is larger than the cross-section of the fixed rod, and the upper surface of the filter plate is arranged at the bottom end of the fixed rod, and a reset spring is sleeved on the outer surface of the fixed rod at the right end, and the left end of the reset spring is fixedly connected to the outer surface of the movable frame, and the right end is fixedly connected to the right side wall of the filter bin.

[0020] As a preferred solution of the waste gas treatment device for laboratory fume hoods of the present invention, the second driving assembly includes a second servo motor movably mounted on the top of the filter box cover, the output end of the second servo motor is connected to a second rotating shaft through a coupling, the bottom end of the second rotating shaft penetrates the filter box cover and extends into the filter bin to be movably connected to an eccentric wheel, and the short shaft end of the eccentric wheel is in close contact with the left side wall of the movable frame;

[0021] A slot in the shape of a cross is provided at the axis center of the eccentric wheel, and the bottom end of the second rotating shaft is inserted into the cross-shaped slot.

[0022] As a preferred solution of the waste gas treatment device for the laboratory fume hood of the present invention, the following is provided: a filter screen is installed at the bottom end inside the collection frame, a drain hole is provided at the rear end of the collection frame and below the filter screen, and the drain hole is communicated with the drain outlet of the spray box. A slanting baffle is fixedly installed at the top end inside the collection frame, and a plurality of slanting baffles are provided.

[0023] An installation groove is provided on the upper surface of the spray box cover. A second through hole is provided at the bottom of the installation groove. The spray assembly includes a diversion box that is movably clamped in the installation groove. A spray head is communicated with the bottom of the diversion box, and the output end of the spray head penetrates through the second through hole and extends into the spray chamber. A liquid inlet is provided on the right side at the top end of the diversion box.

[0024] The beneficial effects of the present invention: By adopting a modular structure design, the spray mechanism, the adsorption mechanism and the filtration mechanism are separately and independently arranged, and quick splicing and disassembly are realized through the connection mechanism, effectively overcoming the problems of the fixed structure and unchangeable combination of the existing device. During use, users can flexibly select treatment modules according to the composition of waste gas, avoid unnecessary treatment steps, reduce energy consumption and improve efficiency. In addition, components that are convenient for cleaning and replacement are adopted in the interior of each module, such as a sliding collection box, a detachable adsorption cylinder, a filter plate that can swing left and right, etc., so that while the device maintains high purification ability, the convenience of daily maintenance and the safety of cleaning operations are greatly improved. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts. Among them:

[0026] Figure 1 is a three-dimensional view of the overall structure of the present invention;

[0027] Figure 2 is a front cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 is a three-dimensional view of the connection mechanism of the present invention;

[0029] Figure 4 is a three-dimensional front cross-sectional view of the connection mechanism of the present invention;

[0030] Figure 5Stereoscopic side sectional view of the connection mechanism of the present invention;

[0031] Figure 6 Stereoscopic front sectional view of the adsorption mechanism of the present invention;

[0032] Figure 7 Top sectional view of the adsorption mechanism of the present invention;

[0033] Figure 8 Stereoscopic exploded view of the adsorption mechanism of the present invention;

[0034] Figure 9 Stereoscopic front sectional view of the filtration mechanism of the present invention;

[0035] Figure 10 Stereoscopic top sectional view of the filtration mechanism of the present invention;

[0036] Figure 11 Stereoscopic exploded view of the filtration mechanism of the present invention;

[0037] Figure 12 Stereoscopic view of the moving frame of the present invention;

[0038] Figure 13 Stereoscopic front sectional view of the spraying mechanism of the present invention;

[0039] Figure 14 Stereoscopic exploded view of the spraying mechanism of the present invention. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be made in conjunction with the accompanying drawings of the specification.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0042] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0043] Embodiment

[0044] Refer to Figures 1 to 14, the embodiment of the present invention provides an exhaust gas treatment device for a laboratory fume hood, which can achieve efficient and multi-stage purification of exhaust gas and is convenient for disassembly and maintenance. The structures of the device adopt modular design, and each functional module can be flexibly combined according to requirements to adapt to different experimental scenarios and significantly improve the maintenance efficiency. The following is the specific structure and function description of this embodiment:

[0045] This exhaust gas treatment device mainly includes an adsorption mechanism 100, a connection mechanism 200, a filtration mechanism 300, and a spraying mechanism 400. Among them, the structures are modularly inserted through the cooperation of special connection blocks and connection slots, with flexible structures, facilitating disassembly, combination, and maintenance.

[0046] 1. Spraying mechanism (400)

[0047] The spraying mechanism 400 is used for liquid spraying pretreatment of the exhaust gas entering the device, and can effectively capture and settle particulate matter, some acidic and alkaline gases, and water-soluble harmful components in the exhaust gas. This part includes:

[0048] Spraying box 401: As the main carrier of the spraying mechanism, a spraying chamber 401a is provided inside it to form an independent spraying operation space. The exhaust gas fully contacts the spraying liquid in this chamber for preliminary purification.

[0049] Collection frame 402: It is movably installed at the bottom end of the spraying chamber 401a, used for collecting the waste liquid and settled impurities generated during the spraying process. A filter screen 405 is installed at the bottom end to further intercept larger particles and prevent the drain outlet from being blocked. The drain hole 402a at the rear end of the collection frame 402 is communicated with the drain outlet of the spraying box 401, facilitating the timely discharge of the waste liquid and preventing liquid accumulation. A plurality of inclined baffles 406 are fixedly installed at the top end inside the collection frame 402, used to guide the exhaust gas to form a turbulent flow in the spraying chamber, increase the gas-liquid contact area, thereby improving the spraying purification effect and preventing liquid droplets from being carried out by the airflow.

[0050] Spraying box cover 403: It is movably installed on the upper surface of the spraying box 401, facilitating opening for maintenance, adding spraying liquid, or replacing internal components. The cover body is fixed on the top of the spraying box through bolts to achieve stable installation. An installation groove 403a is provided on its upper surface, and a second through hole 403b is opened at the bottom of the installation groove.

[0051] Spraying component 404: It includes a diversion box 404a that is movably clamped in the installation groove 403a. The bottom of the diversion box is communicated with a nozzle 404b. The output end of the nozzle 404b passes through the second through hole 403b and extends into the spraying chamber 401a, used to atomize the spraying liquid and spray it into the exhaust gas path to achieve uniform spraying. A liquid inlet 404c is opened on the right side at the top end of the diversion box 404a, used to connect with the liquid supply pipeline to supplement the spraying liquid.

[0052] In addition, for the purpose of facilitating the regular maintenance and disassembly and cleaning of the spraying mechanism 400, the device fully considers the simplicity of operation in its structural design. When the staff needs to clean the spraying mechanism, they can first manually remove the diversion box 404a from the installation groove 403a above the spraying box cover 403. At this time, the spray head 404b connected to the bottom of the diversion box 404a can also be withdrawn from the second through hole 403b, thus completing the rapid removal of the entire spraying assembly 404. Subsequently, the staff only needs to remove the bolts fixed at the four corners of the spraying box cover 403 to remove the entire spraying box cover 403. After the spraying box cover is removed, an open structure is formed at the top of the spraying chamber 401a, and the staff can directly draw out the collection frame 402 from the spraying chamber 401a from above, and then clean or replace the inclined baffle 406 and the filter screen 405 inside the collection frame 402. The entire operation process is fast and efficient, significantly improving the maintenance convenience and reducing the risk of cross-contamination.

[0053] Connection with other modules: The left end of the spraying box 401 is connected to an exhaust pipe 500 through a connection mechanism 200 to realize the orderly discharge of the purified gas; the right end is connected to the adsorption box 101 through the connection mechanism 200 to ensure the continuity of the waste gas flow and the step-by-step cooperation of the treatment modules.

[0054] 2. Adsorption mechanism (100)

[0055] The adsorption mechanism 100 is located between the spraying mechanism and the filtering mechanism, and mainly undertakes the efficient adsorption and purification of organic volatiles, odors and some harmful components in the waste gas. Its structure and functions include:

[0056] Adsorption box 101: It is the core housing, and an adsorption chamber 101a is opened inside to form a closed adsorption treatment space. A positioning shaft 102 is fixedly installed at the center of the bottom end of the adsorption chamber 101a to play a positioning and supporting role.

[0057] Adsorption cylinder 103: It is the core component of this section of the structure, and it includes a combined structure composed of a cylinder body 103a and a sealing cover 103c. Among them, the bottom of the cylinder body 103a is rotationally connected to the positioning shaft 102, which can make the entire adsorption cylinder 103 always rotate around the central axis of the adsorption chamber 101a, playing a role of limiting and central positioning, and ensuring that the waste gas is evenly adsorbed when passing through.

[0058] The interior of the cylinder body 103a can be filled with adsorption materials such as activated carbon. Multiple first through holes 103b are provided on its outer surface, which can enable the incoming waste gas to form a multi-faceted flow path inside, increasing the contact area with the adsorption material, thereby enhancing the adsorption efficiency. The top end of the adsorption cylinder is a detachable structure, and its sealing cover 103c is installed on the top opening of the cylinder body 103a by a snap connection method to form a closed space and prevent the adsorption material from leaking. A cross-shaped card slot 103c1 is provided at the center of the top end of the sealing cover 103c for plugging and transmission.

[0059] Adsorption box cover 105: It is movably installed on the upper surface of the adsorption box 101 and can be fixed to the top of the box body by four bolts. The middle part of its lower surface is rotatably connected to the top of the sealing cover 103c to ensure a tight closure when the cover is closed. A first driving assembly 104 is movably installed at the center of the top of the cover body.

[0060] First driving assembly 104: It includes a first servo motor 104a that is movably snapped into the center of the top end of the adsorption box cover 105, and its output end is connected to a first rotating shaft 104b through a coupling. The bottom end of the first rotating shaft 104b penetrates the adsorption box cover 105 and is plugged into the cross-shaped card slot 103c1 of the sealing cover 103c, thereby realizing rotational transmission under the drive of the motor. Since the first rotating shaft 104b is rotatably connected to the inner wall of the adsorption box cover 105 through a bearing, the transmission process is stable and smooth.

[0061] During actual use, the first servo motor 104a can regularly drive the rotating shaft 104b to rotate, causing it to drive the entire adsorption cylinder 103 to rotate through the sealing cover 103c. This rotation mechanism can shake the activated carbon material to a certain extent, prevent adsorption dead zones caused by accumulation, and improve the overall adsorption efficiency and service life.

[0062] This structural design not only realizes the dynamic optimization of the adsorption work but also greatly improves the convenience of later maintenance. When the staff needs to replace or clean the adsorption cylinder 103, first, they only need to remove the bolts at the four corners of the adsorption box cover 105, and then they can lift the entire adsorption box cover through the handle on the cover body. At this time, with the removal of the box cover 105, the first rotating shaft 104b is automatically separated from the sealing cover 103c, and the entire transmission system is disconnected.

[0063] After the adsorption box cover 105 is removed, an open structure is formed at the top end of the adsorption chamber 101a. The staff can directly pull out the adsorption cylinder 103 from the chamber from above. Then, simply opening the sealing cover 103c can conveniently take out or replace the adsorption material, thoroughly clean and dry the interior of the cylinder body 103a, and after refilling, reassemble it and put it into use. This design significantly improves the maintenance efficiency of the equipment while ensuring performance, reducing the operation difficulty and pollution risk.

[0064] Connection with other modules: The left end of the adsorption box 101 is connected to the spray box 401 through the connection mechanism 200, and the right end is connected to the filter box 301 through the connection mechanism 200, forming an integrated multi-stage purification path.

[0065] 3. Filter mechanism (300)

[0066] The filter mechanism 300 is arranged at the initial end of the entire waste gas treatment device. Its main function is to perform primary filtration on the waste gas discharged from the laboratory fume hood, mainly used to remove larger particulate matter, dust impurities, etc. entrained in the waste gas, providing a clean basic air flow for the subsequent adsorption and spray purification links, and improving the overall purification efficiency.

[0067] Filter box 301: The main outer shell of the filter mechanism. A filter chamber 301a is opened inside it, which serves as the main working chamber for waste gas filtration treatment. The waste gas first enters the inside of the filter chamber 301a for primary filtration.

[0068] Collection box 302: A structure slidably connected to the bottom end of the filter chamber 301a, used to receive the particulate impurities that fall during the filtration process, preventing debris from depositing at the bottom of the chamber body, and facilitating subsequent centralized cleaning and treatment. A handle is provided on the right side of the collection box 302, and the staff can easily pull it out from the inside of the filter box 301 through this handle.

[0069] Filter plate 303: The core component for realizing primary particulate filtration, arranged in the central area of the collection box 302. The filter plate 303 achieves a pre-purification effect by intercepting dust particles in the air flow. Its top end is installed in the clamping groove 304a opened at the bottom of the moving frame 304 in a sliding manner to realize the linkage operation with the moving frame.

[0070] Moving frame 304: Slidably connected between the fixed rods 307 on both sides of the inner top of the filter chamber 301a, playing a role in supporting and driving the filter plate 303 to move reciprocally left and right. During the left and right sliding of the moving frame, the filter plate 303 is driven to complete "shaking type" auxiliary dust removal, improving the filtration smoothness and preventing impurity accumulation.

[0071] Second handle 308: Fixedly installed at the center position on the upper surface of the filter plate 303, facilitating direct operation by the staff when cleaning or replacing the filter plate.

[0072] Through slot 308a: Arranged between the second handle 308 and the filter plate 303, which is a key auxiliary design in the filter structure. Its cross-section is larger than that of the fixed rod 307, and it has two functions: one is to prevent the fixed rod 307 from hindering the horizontal insertion action of the filter plate 303, ensuring that the filter plate can be smoothly installed in the clamping groove; the other is to provide space for the staff's disassembly operation in the future, improving the smoothness of disassembly and assembly.

[0073] Reset spring 309: It is arranged on the outer surface of the right end of the fixed rod 307 and is used to provide a resilience force after the filter plate is driven to move rightward, assisting the filter plate to reset leftward and realizing automatic cyclic movement.

[0074] Second driving assembly 305: It includes a second servo motor 305a installed at the top end of the filter box cover 306, and its output end is connected with a second rotating shaft 305b through a coupling. The second rotating shaft 305b passes through the filter box cover 306 and is connected with an eccentric wheel 305c in the filter chamber 301a. The short axis end of the eccentric wheel 305c is in close contact with the left side wall of the moving frame 304, and the long axis end is the key driving contact surface. Power transmission is achieved through the insertion of the rotating shaft into the one-word card slot 305c1 at the center of the structure.

[0075] During the operation of the equipment, the second servo motor 305a drives the second rotating shaft 305b to rotate, and the eccentric wheel 305c rotates continuously in a circular motion. When the long axis end of the eccentric wheel 305c abuts against the left side wall of the moving frame 304, it can push the moving frame 304 to move rightward, driving the clamped filter plate 303 to move rightward as a whole, and at the same time, the reset spring 309 at the right end is compressed. When the eccentric wheel continues to rotate until the long axis end moves away from the moving frame 304, under the resilience force of the spring 309, the moving frame 304 together with the filter plate 303 automatically returns to the left, thus forming a left-right reciprocating vibration filtering effect. This structure can realize automatic dust cleaning and dynamic dust removal during the filtering process through simple eccentric wheel transmission, improve the service life of the filter plate and reduce the risk of blockage.

[0076] Filter box cover 306: It is movably installed on the upper surface of the filter box 301 and is fixed to the top of the filter box 301 by four bolts. This cover body not only facilitates the staff to open it for equipment maintenance, but also plays a role in fixing the driving mechanism and stabilizing the structure.

[0077] In actual maintenance, when it is necessary to clean or replace components of the filtering mechanism 300, the staff can first remove the bolts at the four corners of the filter box cover 306, and then remove the entire cover body through the handle provided on the cover body. At this time, the top end of the filter chamber 301a becomes an open state, and the staff can draw out the filter plate 303 from the filter chamber 301a by grasping the second handle 308 for cleaning or replacement. Moreover, by operating the handle on the right side of the collection box 302, the collection box 302 can also be smoothly drawn out from the filter box 301, which is convenient for removing dust and sundries or cleaning, and the whole operation process is simple and efficient.

[0078] Connection with other modules: The left end of the filter box 301 is connected and communicated with the adsorption box 101 through the connection mechanism 200 to realize the inflow of the gas after primary filtration into the adsorption stage; the right end of the filter box is connected and communicated with an air inlet pipe 600 through the connection mechanism 200, which is the air inlet of the whole treatment device, and the waste gas enters from here and completes multi-stage purification through steps such as filtration, adsorption, and spraying.

[0079] 4. Connection mechanism (200)

[0080] The connection mechanism 200 is used to achieve the quick splicing and detachable connection between various functional modules in this device, so as to construct a modular processing structure, enabling the device to be flexibly combined according to different experimental conditions and meeting various gas purification requirements.

[0081] In this embodiment, connection blocks 203 are fixedly installed at the openings on the left and right sides of the adsorption box 101, the filtration box 301, and the spray box 401. Each connection block 203 cooperates with the connection groove structure in the connection mechanism 200 to achieve the tight connection between adjacent boxes.

[0082] Specifically, the connection mechanism 200 includes connection frames 201 arranged on the left and right sides of each box. The inside of the connection frame 201 is a cavity structure, and connection grooves 201a are symmetrically opened on its left and right sides. A clamping component 202 is arranged above each connection groove 201a for cooperating with the connection block 203 to fix. The connection groove 201a is used to insert the connection block 203 on each module to achieve structural docking.

[0083] The connection block 203 is a strip-shaped structure. A positioning groove 203a is opened at its top end, and a bevel guiding structure is provided at one end close to the insertion direction of the connection frame. This structure can not only facilitate alignment and insertion but also automatically activate the clamping component during the insertion process, improving the installation efficiency and automatic positioning ability.

[0084] The clamping component 202 includes:

[0085] A positioning block 202a: movably installed on the upper part of the connection frame 201 and capable of moving up and down to engage or disengage from the positioning groove 203a;

[0086] A first handle 201b: fixedly connected to the positioning block 202a and extending to the outside of the connection frame 201 for staff to operate;

[0087] A telescopic spring 202c: connected between the positioning block 202a and the connection frame 201 to provide a resilient force for the positioning block 202a.

[0088] During the installation operation, the staff only needs to insert the connection block 203 on one side of the module box (such as the filtration box 301) to be assembled into the connection groove 201a of the connection frame 201. During the pushing and insertion process, the bevel section at the front end of the connection block 203 can first pass through the gap between the positioning block 202a and the connection groove 201a. During the insertion process, the bevel also plays a guiding and jacking role, jacking the positioning block 202a upward, and at the same time driving the telescopic spring 202c to be stretched and store energy.

[0089] When the connecting block 203 is fully inserted deep into the connecting slot 201a and the positioning block 202a is exactly above the positioning slot 203a, the telescopic spring 202c will quickly release its restoring force, causing the positioning block 202a to automatically snap into the positioning slot 203a, thereby realizing the limit fixation of the connecting block 203 and ensuring firm connection and reliable sealing between the two boxes.

[0090] During the disassembly process, the staff only needs to pull the first handle 201b outwards to drive the positioning block 202a to withdraw from the positioning slot 203a, releasing the limit state of the connecting block 203. At this time, the corresponding module box can be directly pulled out from the device, facilitating independent cleaning, replacement, or recombination. After releasing the first handle 201b, the restoring force of the telescopic spring 202c will automatically reset the positioning block 202a to its initial position, maintaining the standby state of the clamping component and preparing for the next insertion.

[0091] Through the above structural settings, the connecting mechanism 200 not only realizes efficient, precise, and highly repeatable module connection but also significantly improves the structural flexibility and usability of the entire waste gas treatment device, greatly facilitating daily maintenance and module function allocation, and having good practical promotion value.

[0092] In summary, each functional module of this device can be independently disassembled, individually cleaned, or replaced, and can be flexibly combined to meet different laboratory waste gas treatment requirements. Multiple mechanical linkages and modular plug-in structures are adopted between the mechanisms to achieve the organic unity of structural flexibility, convenient operation, and efficient purification, greatly improving the practicality and economy of the waste gas treatment equipment for laboratory fume hoods.

[0093] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as being integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structures that perform the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0094] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to the implementation of the present invention).

[0095] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, manufacturing and production.

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An exhaust gas treatment device for a laboratory fume hood, characterized in that: including, an adsorption mechanism (100), including an adsorption box (101), an adsorption chamber (101a) is formed inside the adsorption box (101), a positioning shaft (102) is fixedly installed at the center of the bottom end of the adsorption chamber (101a), an adsorption cylinder (103) is rotatably connected to the top end of the positioning shaft (102), a first driving component (104) is drivingly connected to the top end of the adsorption cylinder (103), and an adsorption box cover (105) is movably installed on the upper surface of the adsorption box (101); a connection mechanism (200), including connection frames (201) arranged on the left and right sides of the adsorption box (101), the inside of the connection frames (201) is hollow, connection grooves (201a) are symmetrically formed on the left and right sides of the connection frames (201), and clamping components (202) are arranged at the top ends of the two connection grooves (201a); a filtering mechanism (300), including a filtering box (301) arranged on the right side of the adsorption box (101), a filtering chamber (301a) is formed inside the filtering box (301), a collection box (302) is slidably connected to the bottom end of the filtering chamber (301a), a filter plate (303) is slidably connected to the center of the inside of the collection box (302), a moving frame (304) is arranged on the outer side of the top end of the filter plate (303), a second driving component (305) is arranged on the left side of the moving frame (304), and a filtering box cover (306) is movably installed on the upper surface of the filtering box (301); and, a spraying mechanism (400), including a spraying box (401) arranged on the left side of the adsorption box (101), a spraying chamber (401a) is formed inside the spraying box (401), a collection frame (402) is movably installed at the bottom end of the inside of the spraying chamber (401a), a spraying box cover (403) is movably installed on the upper surface of the spraying chamber (401a), and a spraying component (404) is movably installed in the middle of the spraying box cover (403).

2. The waste gas treatment device for a laboratory fume hood according to claim 1, characterized in that: Connection blocks (203) are fixedly installed at the openings at the left and right ends of the adsorption box (101), the filtering box (301) and the spraying box (401), and the connection blocks (203) are inserted into the connection grooves (201a).

3. The waste gas treatment device for a laboratory fume hood according to claim 2, characterized in that: A positioning groove (203a) is formed at the top end of the connection block (203), the clamping component (202) includes a positioning block (202a) inserted into the positioning groove (203a), and the top end of the positioning block (202a) penetrates through the connection frame (201) and extends to the outside and is fixedly connected to a first handle (201b). Elastic springs (201c) are symmetrically installed on the front and rear sides of the bottom end of the first handle (201b), and the bottom ends of the two elastic springs (201c) are fixedly connected to the inner wall of the connection frame (201).

4. The waste gas treatment device for a laboratory fume hood according to claim 3, characterized in that: Slopes are formed on the upper sides of the ends of the plurality of connection blocks (203) close to the connection frame (201), and a certain gap exists between the bottom end of the positioning block (202a) and the bottom wall of the connection groove (201a).

5. The waste gas treatment device for a laboratory fume hood according to claim 4, characterized in that: The left end of the spray box (401) is connected to an exhaust pipe (500) via a connecting mechanism (200), the right end of the spray box (401) is connected to the adsorption box (101) via a connecting mechanism (200), the right end of the adsorption box (101) is connected to the filter box (301) via a connecting mechanism (200), and the right end of the filter box (301) is connected to an air intake pipe (600) via a connecting mechanism (200).

6. The waste gas treatment device for a laboratory fume hood according to claim 5, characterized in that: The adsorption box cover (105), the filter box cover (306) and the spray box cover (403) are movably connected to the upper surfaces of the three groups of boxes respectively through bolts.

7. The waste gas treatment device for a laboratory fume hood according to claim 6, characterized in that: The adsorption cylinder (103) comprises a cylinder (103a), and the bottom of the cylinder (103a) is rotatably connected to the positioning shaft (102), the interior of the cylinder (103a) can be filled with activated carbon adsorption material, the outer surface of the cylinder (103a) is provided with a first through hole (103b), the top of the cylinder (103a) is movably mounted with a sealing cover (103c), and the top of the sealing cover (103c) is rotatably connected to the bottom wall of the adsorption box cover (105), and a cross slot (103c1) is provided at the center of the top of the sealing cover (103c); The first driving assembly (104) includes a first servo motor (104a) movably connected to the center of the top end of the adsorption box cover (105), the output end of the first servo motor (104a) is connected to the first rotating shaft (104b) through a coupling transmission, and the bottom end of the first rotating shaft (104b) passes through the adsorption box cover (105) and is inserted into the cross slot (103c1), and the first rotating shaft (104b) is rotatably connected to the inner wall of the adsorption box cover (105) through a bearing.

8. The waste gas treatment device for a laboratory fume hood according to claim 7, characterized in that: Fixed rods (307) are symmetrically installed on the left and right sides of the inner top wall of the filter bin (301a), the movable frame (304) is slidably connected between the two fixed rods (307), a clamping groove (304a) is opened at the bottom of the movable frame (304), and the top end of the filter plate (303) is slidably connected in the clamping groove (304a), and a second handle (308) is fixedly installed at the center of the upper surface of the filter plate (303), and the second handle (308) is connected to the filter plate (303), and a through groove (308a) is provided between the filter plate (303), and the cross section of the through groove (308a) is larger than the cross section of the fixing rod (307), and the upper surface of the filter plate (303) is arranged at the bottom end of the fixing rod (307), and the outer surface of the fixing rod (307) at the right end is sleeved with a return spring (309), and the left end of the return spring (309) is fixedly connected to the outer surface of the movable frame (304), and the right end is fixedly connected to the right side wall of the filter bin (301a).

9. The exhaust gas treatment device for a laboratory fume hood according to claim 8, characterized in that: The second driving component (305) includes a second servo motor (305a) movably installed at the top end of the filter box cover (306). The output end of the second servo motor (305a) is drivingly connected to a second rotating shaft (305b) through a coupling. The bottom end of the second rotating shaft (305b) penetrates through the filter box cover (306) and extends into the filter chamber (301a) to be movably connected to an eccentric wheel (305c). The short axis end of the eccentric wheel (305c) is in close contact with the left side wall of the moving frame (304). A slot (305c1) is formed at the center of the eccentric wheel (305c), and the bottom end of the second rotating shaft (305b) is inserted into the slot (305c1).

10. The waste gas treatment device for a laboratory fume hood according to claim 9, characterized in that: A filter screen (405) is installed at the bottom end inside the collection box (402). A drain hole (402a) is formed at the rear end of the collection box (402) and below the filter screen (405). The drain hole (402a) is communicated with the drain outlet of the spray box (401). A plurality of inclined baffles (406) are fixedly installed at the top end inside the collection box (402). An installation groove (403a) is formed on the upper surface of the spray box cover (403). A second through hole (403b) is formed at the bottom of the installation groove (403a). The spray component (404) includes a diversion box (404a) movably clamped in the installation groove (403a). A spray head (404b) is communicated with the bottom of the diversion box (404a). The output end of the spray head (404b) penetrates through the second through hole (403b) and extends into the spray chamber (401a). A liquid inlet (404c) is formed at the right side of the top end of the diversion box (404a).

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