Sensor-based laboratory emergency exhaust on-off device

Abstract

The utility model belongs to laboratory ventilation field especially based on sensor's laboratory emergency exhaust opening and closing device, in view of the current laboratory exhaust system response speed and flexibility are insufficient in the face of sudden situation, the traditional exhaust system control is simple, and the exhaust effect is not ideal, present the following scheme, it includes the air inlet pipe, the bottom middle position fixed coupling of air inlet pipe is provided with the fixed base, the top of fixed base is linked together with the bottom of air inlet pipe, the one side of fixed base is provided with the exhaust hole, the exhaust hole is linked together with the ventilation pipe, both ends of air inlet pipe all integrative side edge board that has, the inside of side edge board is provided with first round hole, in the utility model, adopt servo motor and gear and rack drive mechanism, realize the intelligent opening and closing and the regulation of exhaust system through control assembly, set up filter assembly in the fixed base, carry out efficient filtration to the air that enters through activated carbon filter board, effectively remove harmful gas and particulate matter.

Description

Technical Field

[0001] This utility model relates to the field of laboratory ventilation technology, and in particular to a sensor-based laboratory emergency exhaust ventilation start-up and shut-off device. Background Technology

[0002] In laboratory environments, various chemical and biological experiments frequently occur, potentially generating harmful gases, fumes, or other pollutants. To ensure the safety and health of laboratory personnel and prevent damage to experimental equipment, these harmful substances must be removed promptly and effectively. Traditional laboratory ventilation systems often rely on fixed exhaust fans and ventilation ducts. While these systems can meet basic ventilation needs to a certain extent, they lack the speed and flexibility to respond to emergencies, such as sudden leaks of harmful gases.

[0003] Furthermore, traditional exhaust systems are often relatively simple in their control, lacking intelligent monitoring and adjustment mechanisms. Laboratory air quality often cannot be accurately monitored and assessed in real time, leading to ineffective exhaust and potentially even safety hazards. Therefore, developing an emergency exhaust system capable of real-time monitoring of laboratory air quality, rapid activation of the exhaust system as needed, and possessing high-efficiency filtration capabilities is of paramount importance. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing laboratory exhaust systems, which often rely on fixed exhaust fans and ventilation ducts. While these systems can meet basic ventilation needs to a certain extent, they lack the speed and flexibility to respond to emergencies such as sudden leaks of harmful gases. Furthermore, traditional exhaust systems are often simple to control and lack intelligent monitoring and adjustment mechanisms. The air quality in laboratories often cannot be accurately monitored and assessed in real time, leading to unsatisfactory exhaust performance and potentially safety hazards. Therefore, this invention proposes a sensor-based emergency laboratory exhaust system.

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

[0006] A sensor-based laboratory emergency ventilation control device includes an air inlet pipe, a fixed base fixedly connected to the bottom of the air inlet pipe, a top of the fixed base communicating with the bottom of the air inlet pipe, and an exhaust port communicating with the ventilation pipe on one side of the fixed base. The device also includes:

[0007] The side plates are symmetrically arranged at both ends of the air intake pipe, each side plate has a first circular hole, and the air intake pipe has multiple air inlets distributed circumferentially.

[0008] The control component located at the top of the intake pipe includes a servo motor, gears and symmetrically meshing racks. The racks are connected to a sliding rectangular frame via a connecting rod. The rectangular frame is provided with a circular baffle that mates with the first circular hole.

[0009] A ventilation fan is fixedly mounted on the top of the mounting base; and

[0010] A filter assembly slidably disposed within a fixed base includes a filter plate containing activated carbon;

[0011] When the servo motor drives the gear to rotate, it causes the two rectangular frames to move towards each other, causing the circular baffle to disengage from the first circular hole and release the limit of the cover plate. Under the action of the torsion spring, the cover plate opens the air inlet hole. After the ventilation fan starts, an airflow channel is formed from the air inlet hole, the first circular hole to the exhaust hole. The air is discharged after being filtered by the filter plate.

[0012] As a further improvement to the above technical solution:

[0013] A sealing assembly is provided in the air inlet, the sealing assembly including a cover plate and a torsion spring for reset connected by a rotating shaft, the cover plate normally seals the air inlet;

[0014] The blocking assembly includes:

[0015] A rotating shaft is rotatably connected to the inner walls on both sides of the air inlet, and the cover plate is fixedly sleeved onto the rotating shaft through the second round hole;

[0016] The circular grooves are formed on both sides of the cover plate, and the two ends of the torsion spring are respectively fixed to the inner wall of the circular groove and the air inlet hole.

[0017] The cover plate has curved surfaces on both sides, and the inner wall of the air inlet is provided with an arc-shaped sealing plate that matches the curved surface of the cover plate. The sealing plate and the cover plate form a surface contact seal when closed.

[0018] The control component includes:

[0019] A mounting plate is fixed to the inner wall of the air intake pipe, and the servo motor is fixed to the top of the mounting plate;

[0020] Two rectangular frames are symmetrically slidably connected to the inner wall of the intake pipe, and each rectangular frame is connected to a circular baffle through a fixing rod;

[0021] The gear meshes with two racks to form a reverse synchronous motion mechanism, driving the two rectangular frames to move towards or away from each other.

[0022] The diameter of the circular baffle is larger than the diameter of the first circular hole, and it forms an interference fit with the side plate when closed.

[0023] The filtering component includes:

[0024] Multiple rectangular holes are formed in the side wall of the fixed base;

[0025] A filter plate with an exposed handle is slidably connected to a rectangular hole via a slider and a slide rail.

[0026] It also includes a gas sensor and a temperature and humidity sensor installed in the laboratory. The gas sensor is electrically connected to a servo motor and a ventilation fan. When an excessive amount of harmful gas is detected, an emergency exhaust is triggered. The filter plate is filled with an activated carbon layer with a thickness of 10-15 mm and a particle size of 2-4 mm. The air inlet pipe is a stainless steel square tube with a matrix distribution of air inlet holes on its side wall with a diameter of 30-50 mm.

[0027] In this application, various types of sensors, such as hazardous gas sensors (e.g., MQS2B smoke, hazardous gas sensor or QM-N10 gas-sensitive detection tube, etc.) and temperature and humidity sensors, are deployed in various key locations in the laboratory to collect environmental data in real time.

[0028] When emergency ventilation needs to be activated, the servo motor can be started. The output shaft of the servo motor drives the gear to rotate. The gear drives the two racks to move closer to each other. The two racks drive the two connecting rods to move closer to each other. The two connecting rods drive the two rectangular frames to move closer to each other. The two rectangular frames drive multiple fixed rods to move laterally. The fixed rods drive the circular baffle to move laterally. At this time, the circular baffle no longer abuts against one side of the side plate, so that air can enter from the gap between the first circular hole and the circular baffle.

[0029] Simultaneously, after the rectangular frame moves, it no longer opposes the multiple cover plates. Under the torque of the torsion spring, the cover plates rotate and tilt at a 45-degree angle, separating from the sealing plates on both sides. This allows space to be exposed around the air intake pipe, facilitating air entry. After the servo motor is started in reverse, the two rectangular frames can be pushed out again. The two rectangular frames push the multiple cover plates back to their original positions and use a circular baffle to seal the first circular hole again. The ventilation fan is then started, drawing air in through multiple holes. After being filtered by the filter plate, the air is discharged into the corresponding pipe through the exhaust port. The filter plate contains activated carbon, which can be used to adsorb harmful substances and can be quickly replaced, making it convenient to use.

[0030] Beneficial effects: By deploying various types of sensors, such as hazardous gas sensors and temperature and humidity sensors, in key locations throughout the laboratory, environmental data can be collected in real time. Once an air quality problem is detected, the emergency ventilation system can be quickly activated to effectively remove harmful substances and ensure the safety and health of laboratory personnel.

[0031] The system employs a servo motor and rack and pinion transmission mechanism, and uses control components to achieve intelligent opening, closing, and adjustment of the exhaust system. When emergency exhaust is required, the servo motor drives the gear to rotate, which in turn drives the two rectangular frames to move closer together, opening the air inlet and the first circular hole to allow air to enter smoothly; conversely, the air inlet and the first circular hole can be blocked again, achieving flexible control of the exhaust system.

[0032] A filter assembly is installed inside the mounting base, using an activated carbon filter plate to efficiently filter the incoming air, effectively removing harmful gases and particulate matter. Meanwhile, the filter plate uses a sliding block and rail connection method for easy and quick replacement and maintenance, ensuring the continuous and efficient operation of the exhaust system.

[0033] The entire device has a compact structure and a reasonable layout, which not only reduces the floor space occupied but also facilitates daily maintenance and upkeep. The connections between the components are firm and reliable, ensuring the stability and durability of the device. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the sensor-based laboratory emergency ventilation opening and closing device proposed in this utility model;

[0035] Figure 2 This is a three-dimensional structural diagram of the sensor-based laboratory emergency ventilation opening and closing device proposed in this utility model from a second perspective.

[0036] Figure 3 This is an exploded view of the fixed base in the sensor-based laboratory emergency ventilation start-stop device proposed in this utility model;

[0037] Figure 4 This is an exploded view of the air inlet block and cover plate in the sensor-based laboratory emergency ventilation opening and closing device proposed in this utility model;

[0038] Figure 5 This is an exploded view of the cover plate in the sensor-based laboratory emergency ventilation opening and closing device proposed in this utility model;

[0039] Figure 6 This is a three-dimensional structural diagram of the rectangular frame and servo motor in the sensor-based laboratory emergency ventilation opening and closing device proposed in this utility model.

[0040] In the diagram: 1. Intake pipe; 2. Side plate; 3. Mounting base; 4. Filter plate; 5. Cover plate; 6. Exhaust port; 7. Ventilation fan; 8. Rectangular hole; 9. Handle; 10. Air inlet; 11. First circular hole; 12. Rectangular frame; 13. Circular baffle; 14. Sealing plate; 15. Shaft; 16. Torsion spring; 17. Circular groove; 18. Second circular hole; 19. Gear; 20. Servo motor; 21. Rack; 22. Connecting rod; 23. Fixing rod; 24. Mounting plate. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0042] Example 1

[0043] Traditional exhaust systems are often simple to control, lacking intelligent monitoring and adjustment mechanisms. Laboratory air quality often cannot be accurately monitored and assessed in real time, leading to ineffective exhaust and potentially safety hazards. Therefore, developing an emergency exhaust system capable of real-time monitoring of laboratory air quality, rapid activation of the exhaust system as needed, and high-efficiency filtration is crucial.

[0044] Reference Figure 1-6 The exhaust opening and closing device includes an air inlet pipe 1. A fixing seat 3 is fixedly connected to the bottom center of the air inlet pipe 1. The top of the fixing seat 3 is connected to the bottom of the air inlet pipe 1. An exhaust hole 6 is opened on one side of the fixing seat 3 and is connected to a ventilation pipe. Side plates 2 are integrally formed at both ends of the air inlet pipe 1. A first circular hole 11 is opened inside the side plate 2. Air inlet holes 10 are opened around the air inlet pipe 1. A sealing component for sealing the air inlet hole 10 is provided inside the air inlet hole 10. The sealing component includes the same rotating shaft 15 rotatably connected between the inner walls of the two sides of the air inlet hole 10. A cover plate 5 is provided on the outer wall of the rotating shaft 15. A second circular hole 18 is opened inside the cover plate 5. The rotating shaft 15 is fixedly connected to the second circular hole 18. Inside, both sides of the cover plate 5 are provided with circular grooves 17. The same torsion spring 16 is fixedly connected between the inner wall of one side of the circular groove 17 and the inner wall of one side of the air inlet 10. The torsion spring 16 is sleeved on the rotating shaft 15 to help the cover plate 5 to reset. Both sides of the cover plate 5 are provided with arcs. Both sides of the air inlet 10 are fixedly connected with sealing plates 14. One side of the sealing plate 14 is arc-shaped. The two sealing plates 14 abut against the two sides of the cover plate 5 to improve the sealing performance of the cover plate 5. Various types of sensors, such as harmful gas sensors such as MQS2B smoke, harmful gas sensors or QM-N10 gas-sensitive detection tubes, temperature and humidity sensors, etc., are deployed in various key locations in the laboratory to collect environmental data in real time.

[0045] When emergency ventilation needs to be activated, the servo motor 20 can be started. The output shaft of the servo motor 20 drives the gear 19 to rotate. The gear 19 drives the two racks 21 to move closer to each other. The two racks 21 drive the two connecting rods 22 to move closer to each other. The two connecting rods 22 drive the two rectangular frames 12 to move closer to each other. The two rectangular frames 12 drive multiple fixed rods 23 to move laterally. The fixed rods 23 drive the circular baffle 13 to move laterally. At this time, the circular baffle 13 no longer abuts against one side of the side plate 2, so that air can enter from the gap between the first circular hole 11 and the circular baffle 13.

[0046] The inner top wall of the air intake pipe 1 is equipped with a control component for controlling the opening and closing of the exhaust system. This component is used to promptly exhaust air when there are problems with the laboratory air quality. The control component includes a mounting plate 24 fixedly connected to the inner wall of one side of the air intake pipe 1. A servo motor 20 is fixedly connected to the top of the mounting plate 24. A gear 19 is fixedly sleeved on the output shaft of the servo motor 20. Two symmetrically arranged rectangular frames 12 are slidably connected to the inner wall of the air intake pipe 1. A connecting rod 22 is fixedly connected to one side of the rectangular frame 12. A rack 21 is fixedly connected to one end of the connecting rod 22. The two racks 21 are centrally symmetrically arranged and located on both sides of the gear 19. The racks 21 mesh with the gear 19. The inner wall of the rectangular frame 12... Multiple fixing rods 23 are fixedly connected, and one end of each fixing rod 23 is fixedly connected to the same circular baffle 13. The circular baffle 13 cooperates with the first circular hole 11 and is used to block the first circular hole 11. At the same time, after the rectangular frame 12 moves, it no longer abuts against the multiple cover plates 5. The cover plates 5 rotate under the torque of the torsion spring 16 and are tilted at 45 degrees. The cover plates 5 separate from the sealing plates 14 on both sides, thereby allowing space to be leaked around the air intake pipe 1, which facilitates the entry of air. After the servo motor 20 is started in reverse, the two rectangular frames 12 can be pushed out again. The two rectangular frames 12 push the multiple cover plates 5 back to their original positions and use the circular baffle 13 to block the first circular hole 11 again.

[0047] This application can be used in the field of laboratory ventilation, or in other fields applicable to this application.

[0048] Example 2

[0049] refer to Figure 1-6An improvement based on Example 1: A sensor-based laboratory emergency exhaust ventilation device, applied to the field of laboratory ventilation, is provided. A ventilation fan 7 is fixedly embedded in the top of the fixed base 3. The ventilation fan 7 is located at the connection between the air inlet pipe 1 and the fixed base 3. The fixed base 3 is equipped with a filter assembly for filtering air, which is used to filter the air after drawing in harmful gases. The filter assembly includes multiple rectangular holes 8 on one side of the fixed base 3. A filter plate 4 is slidably connected inside the rectangular holes 8 through a slider and a slide rail. Activated carbon is placed inside the filter plate 4. A handle 9 is fixedly connected to one side of the filter plate 4 for easy pulling out of the filter plate 4. When the ventilation fan 7 is activated, the ventilation fan 7 draws in air through multiple holes, and after being filtered by the filter plate 4, it is discharged into the corresponding pipe through the exhaust hole 6. Activated carbon is placed inside the filter plate 4, which can be used to adsorb harmful substances and can be quickly replaced.

[0050] However, as is well known to those skilled in the art, the working principles and wiring methods of the ventilation fan 7 and the servo motor 20 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0051] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sensor-based laboratory emergency ventilation opening and closing device, comprising an air inlet pipe (1), wherein a fixing seat (3) is fixedly connected to the bottom of the air inlet pipe (1), the top of the fixing seat (3) is connected to the bottom of the air inlet pipe (1), and an exhaust hole (6) communicating with a ventilation pipe is provided on one side of the fixing seat (3), characterized in that, Also includes: The side plates (2) are symmetrically arranged at both ends of the air intake pipe (1), and each side plate (2) has a first round hole (11). The air intake pipe (1) has multiple air inlets (10) distributed around its circumference. The control component located at the top of the air intake pipe (1) includes a servo motor (20), a gear (19) and a symmetrically meshing rack (21). The rack (21) is connected to a sliding rectangular frame (12) via a connecting rod (22). The rectangular frame (12) is provided with a circular baffle (13) that mates with the first circular hole (11). A ventilation fan (7) is fixedly embedded in the top of the mounting base (3); and The filter assembly, which is slidably disposed in the fixed seat (3), includes a filter plate (4) with activated carbon. When the servo motor (20) drives the gear (19) to rotate, it drives the two rectangular frames (12) to move towards each other, causing the circular baffle (13) to disengage from the first circular hole (11) and release the limit of the cover plate (5). Under the action of the torsion spring (16), the cover plate (5) opens the air inlet (10). After the ventilation fan (7) is started, an airflow channel is formed from the air inlet (10), the first circular hole (11) to the exhaust hole (6). The air is filtered by the filter plate (4) and then discharged. A sealing assembly is provided in the air inlet (10). The sealing assembly includes a cover plate (5) rotatably connected by a rotating shaft (15) and a reset torsion spring (16). Under normal conditions, the cover plate (5) seals the air inlet (10). The blocking assembly includes: Rotary shafts (15) connected to the inner walls on both sides of the air inlet (10) are rotated, and the cover plate (5) is fixedly sleeved on the rotating shafts (15) through the second round hole (18). The circular grooves (17) are opened on both sides of the cover plate (5), and the two ends of the torsion spring (16) are fixed to the inner walls of the circular grooves (17) and the air inlet (10) respectively.

2. The apparatus according to claim 1, characterized in that, The cover plate (5) has arc-shaped curved surfaces on both sides, and the inner wall of the air inlet (10) is provided with an arc-shaped sealing plate (14) that matches the curved surface of the cover plate. The sealing plate (14) and the cover plate (5) form a surface contact seal when closed.

3. The apparatus according to claim 1, characterized in that, The control component includes: A mounting plate (24) is fixed to the inner wall of the air intake pipe (1), and the servo motor (20) is fixed to the top of the mounting plate (24); Two rectangular frames (12) are symmetrically slidably connected to the inner wall of the intake pipe (1), and each rectangular frame (12) is connected to a circular baffle (13) through a fixing rod (23). The gear (19) meshes with two racks (21) to form a reverse synchronous motion mechanism, driving the two rectangular frames (12) to move towards or away from each other.

4. The apparatus according to claim 3, characterized in that, The diameter of the circular baffle (13) is larger than the diameter of the first circular hole (11), and it forms an interference fit with the side plate (2) in the closed state.

5. The apparatus according to claim 1, characterized in that, The filtering component includes: Multiple rectangular holes (8) are formed on the side wall of the fixed base (3); The filter plate (4) is slidably connected to the rectangular hole (8) by a slider and a slide rail, and the filter plate (4) is provided with an exposed handle (9).

6. The apparatus according to claim 1, characterized in that, It also includes a gas sensor and a temperature and humidity sensor installed in the laboratory. The gas sensor is electrically connected to a servo motor (20) and a ventilation fan (7). When an excessive amount of harmful gas is detected, an emergency exhaust is triggered.

7. The apparatus according to claim 5, characterized in that, The filter plate (4) is filled with an activated carbon layer with a thickness of 10-15 mm and a particle size of 2-4 mm.

8. The apparatus according to any one of claims 1-7, characterized in that, The air intake pipe (1) is a stainless steel square tube, and the air intake holes (10) on its side wall are distributed in a matrix, with a diameter of 30-50mm.

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