Dangerous gas detection equipment for experiment table
By installing a variety of gas detection sensors and related control systems on the laboratory bench to detect and deal with harmful gases, the threat of harmful gases on the laboratory bench to personnel health and equipment safety is solved, and effective protection of the laboratory air environment is achieved.
Patent Information
- Application Number
- CN202311093917.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-29
- Publication Date
- 2025-02-28
AI Technical Summary
When conducting experiments at the laboratory bench, staff may be exposed to harmful gases such as formaldehyde, ammonia, etc., which pose a potential threat to personnel's health and equipment safety.
A laboratory bench hazardous gas detection equipment is designed, equipped with formaldehyde detection sensor, ammonia detection sensor, carbon monoxide detection sensor, carbon dioxide detection sensor, oxygen detection sensor and hydrogen sulfide detection sensor. These sensors are connected through a PLC controller. When dangerous gas is detected, they trigger the alarm light and fan, suck in toxic gases and filter through activated carbon filters. At the same time, the electric cylinder and gear system drive the shielding layer to cover the top of the test bench to prevent gas from floating.
Effectively detect and warn staff about exposure to dangerous gases. By inhaling and filtering toxic gases, protect the laboratory air environment and health of personnel, and maximize the harm caused to staff by dangerous gases.
Smart Images
Figure CN119534753A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of air detection, in particular to a laboratory bench dangerous gas detection device. Background Art
[0002] The laboratory table is a table used by hospitals, schools, chemical plants, scientific research institutes and other enterprises and institutions for experimental testing and storage of instruments. According to the placement, it can be divided into: central laboratory table, side laboratory table, corner table; according to the material, it can be divided into: all-steel laboratory table, steel-wood laboratory table, all-wood laboratory table, PP laboratory table, aluminum-wood laboratory table, and some high cabinets: fume hood, medicine cabinet, utensil cabinet, gas cylinder cabinet, explosion-proof cabinet, slide cabinet, etc.
[0003] In existing laboratories and industrial production, workers often use some harmful gases, such as formaldehyde, ammonia, etc. when conducting experiments on the laboratory bench. These dangerous gases are toxic or explosive, posing a potential threat to the health of personnel and the safety of equipment. When the dangerous gases float inside the laboratory and come into contact with the workers, they will cause physical harm to the workers. For this reason, a laboratory bench dangerous gas detection device is proposed. Summary of the invention
[0004] The purpose of the present invention is to provide a laboratory bench dangerous gas detection device to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laboratory bench dangerous gas detection device, comprising a laboratory bench body, a fixing frame is sleeved on the outside of the laboratory bench body, a formaldehyde detection sensor, an ammonia detection sensor, a carbon monoxide detection sensor, a carbon dioxide detection sensor, an oxygen detection sensor and a hydrogen sulfide detection sensor are respectively installed on one side of the top of the laboratory bench body, a plurality of drawers are installed on one side of the laboratory bench body, a PLC controller is fixed on the inner wall of the fixing frame, an alarm light is installed on the outside of the fixing frame, and a shielding component is provided on one side of the laboratory bench body;
[0006] The shielding assembly includes a gear rod and two first rotating shafts. Two gears are meshedly connected to the outer side of the gear rod, and first baffles are fixedly sleeved on the outer sides of the first rotating shafts.
[0007] Preferably, an activated carbon filter is fixed to the inner wall of the fixing frame, and the air inlet end of the activated carbon filter is connected to the top side of the experimental table body through an air pipe.
[0008] Preferably, the air inlet end of the activated carbon filter is connected to a fan through an air pipe, and a plurality of electric cylinders are fixed to the bottom of the inner wall of the fixing frame, and the push rod ends of the electric cylinders are fixed to the bottom of the experimental table body.
[0009] Preferably, the output ends of the formaldehyde detection sensor, ammonia detection sensor, carbon monoxide detection sensor, carbon dioxide detection sensor, oxygen detection sensor and hydrogen sulfide detection sensor are electrically connected to the input end of the PLC controller, and the output end of the PLC controller is electrically connected to the input end of the alarm light, fan and electric cylinder respectively.
[0010] Preferably, a second rotating shaft is fixedly inserted into the axis of the two gears, a second pulley is fixedly sleeved on the outer side of the two second rotating shafts, the second pulley is connected to the first pulley via a belt, and both ends of the second rotating shaft are rotatably connected to the inner side of the limit groove via bearings.
[0011] Preferably, the inner wall of the fixing frame is provided with limiting grooves around all four sides, and the inner wall of the limiting groove is rotatably connected to a third rotating shaft via a bearing.
[0012] Preferably, a second baffle is fixed to one end of the third rotating shaft, and an axis center of one side of the second baffle is fixed to the axis center of the first pulley.
[0013] Preferably, a pull wire is wound between the first baffle and the second baffle, a coil spring is sleeved on the outer side of the first rotating shaft, and two ends of the coil spring are respectively connected to the first baffle and one side of the limiting groove.
[0014] Preferably, a shielding layer is wound around the outer side of the first rotating shaft, and a connecting plate connected to one side of the pulling wire is fixed to one end of the shielding layer.
[0015] Preferably, the top of the gear rod is fixed to the bottom of the laboratory table body, and both ends of the first rotating shaft are rotatably connected to the inner side of the limiting groove through bearings.
[0016] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:
[0017] 1. During the experiment, formaldehyde detection sensors, ammonia detection sensors, carbon monoxide detection sensors, carbon dioxide detection sensors, oxygen detection sensors and hydrogen sulfide detection sensors are used to detect gases throughout the entire process. When the above gases are found, the signal is transmitted to the PLC controller, and the alarm light produces sound and light prompts to inform the staff to leave the vicinity of the experimental table to avoid physical injuries caused by dangerous gases.
[0018] 2. When the dangerous gas is dispersed in the air at a certain concentration, the air inlet end of the fan generates negative pressure, which sucks the dangerous gas generated on the upper side of the laboratory table into the inner side of the activated carbon filter, and filters the toxic and harmful gas through the activated carbon filter to avoid toxic and harmful dangerous gas causing internal laboratory air pollution and protect the laboratory environment.
[0019] 3. When the push rod end of the electric cylinder retracts, it drives the gear rod to move downward. When the gear rotates, it drives the second rotating shaft to rotate, and at the same time drives the second pulley to rotate, so that the connecting plate fixed on one side of the pull wire drives the shielding layer to move along the pull wire, so that the shielding layer covers the top of the experimental table body, preventing the harmful gases generated in the experiment from drifting in the laboratory, preventing the dangerous gases from causing harm to the workers, and protecting the safety of the laboratory air environment to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the appearance of the present invention;
[0022] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;
[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the limiting groove of the present invention from a top view;
[0024] Figure 4 It is a schematic diagram of the structure of the shielding layer of the present invention;
[0025] Figure 5 It is a structural schematic diagram of the first baffle of the present invention;
[0026] Figure 6 It is a structural schematic diagram of the second baffle of the present invention;
[0027] Figure 7 It is a schematic diagram of the pulley connection structure of the present invention.
[0028] Explanation of the accompanying drawings: 1. Laboratory table body; 2. Shielding assembly; 21. Tooth rod; 22. Gear; 23. First rotating shaft; 24. First baffle; 25. Limiting groove; 26. Pull wire; 27. Second baffle; 28. Second rotating shaft; 29. Coil spring; 210. Third rotating shaft; 211. Connecting plate; 212. Shielding layer; 213. First pulley; 214. Second pulley; 3. PLC controller; 4. Alarm light; 5. Activated carbon filter; 6. Fan; 7. Electric cylinder; 8. Fixed bracket; 9. Formaldehyde detection sensor; 10. Ammonia detection sensor; 11. Carbon monoxide detection sensor; 12. Carbon dioxide detection sensor; 13. Oxygen detection sensor; 14. Hydrogen sulfide detection sensor; 15. Drawer. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.
[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.
[0034] Example
[0035] See also Figure 1-7The present invention provides a technical solution: a laboratory bench dangerous gas detection device, comprising a laboratory bench body 1, a fixing frame 8 is sleeved on the outside of the laboratory bench body 1, a formaldehyde detection sensor 9, an ammonia detection sensor 10, a carbon monoxide detection sensor 11, a carbon dioxide detection sensor 12, an oxygen detection sensor 13 and a hydrogen sulfide detection sensor 14 are respectively installed on one side of the top of the laboratory bench body 1, a plurality of drawers 15 are installed on one side of the laboratory bench body 1, a PLC controller 3 is fixed on the inner wall of the fixing frame 8, an alarm light 4 is installed on the outside of the fixing frame 8, the PLC controller 3 outputs electrical signals to the alarm light 4, a fan 6 and an electric cylinder 7 respectively, the alarm light 4 generates sound and light prompts, first notifying the staff to leave the vicinity of the laboratory bench body 1 to avoid physical injuries to the staff caused by dangerous gases, and a shielding component 2 is provided on one side of the laboratory bench body 1;
[0036] An activated carbon filter 5 is fixed to the inner wall of the fixed frame 8, and the air inlet end of the activated carbon filter 5 is connected to the top side of the experimental bench body 1 through an air pipe. The air inlet end of the activated carbon filter 5 is connected to the fan 6 through the air pipe. A number of electric cylinders 7 are fixed to the bottom of the inner wall of the fixed frame 8, and the push rod end of the electric cylinder 7 is fixed to the bottom of the experimental bench body 1. The dangerous gas generated on the upper side of the experimental bench body 1 is sucked into the inner side of the activated carbon filter 5, and the toxic and harmful gases are filtered through the activated carbon filter 5 to avoid toxic and harmful dangerous gases from causing air pollution inside the laboratory and protect the environment of the laboratory. The output ends of the formaldehyde detection sensor 9, the ammonia detection sensor 10, the carbon monoxide detection sensor 11, the carbon dioxide detection sensor 12, the oxygen detection sensor 13 and the hydrogen sulfide detection sensor 14 are electrically connected to the input end of the PLC controller 3, and the output ends of the PLC controller 3 are electrically connected to the input ends of the alarm light 4, the fan 6 and the electric cylinder 7, respectively.
[0037] The shielding assembly 2 includes a gear rod 21 and two first rotating shafts 23. The outer side of the gear rod 21 is meshed with two gears 22. When the gear rod 21 just moves downward, it is in meshing with the gear 22. When the height of the experimental table body 1 is lower than the height of the pull wire 26, the gear rod 21 and the gear 22 begin to mesh. The outer side of the first rotating shaft 23 is respectively fixedly sleeved with a first baffle 24. The axis of the two gears 22 is fixedly inserted with a second rotating shaft 28. The outer sides of the two second rotating shafts 28 are fixedly sleeved with a second pulley 214. The second pulley 214 is connected to the first When the pulley 213 and the push rod end of the electric cylinder 7 are retracted, the gear rod 21 is driven to move downward. At the same time, the gear rod 21 is meshed with the two gears 22, so that the two gears 22 rotate. When the gear 22 rotates, the second rotating shaft 28 is driven to rotate. Both ends of the second rotating shaft 28 are rotatably connected to the inner side of the limiting groove 25 through bearings, and the second pulley 214 is driven to rotate at the same time. Under the action of the belt, the first pulley 213 and the second baffle 27 are driven to rotate. The inner wall of the fixed frame 8 is provided with limiting grooves 25 all around, and the inner wall of the limiting groove 25 is rotatably connected with the third rotating shaft 210 through bearings.
[0038] A second baffle 27 is fixed at one end of the third rotating shaft 210, and the axis of one side of the second baffle 27 is fixed to the axis of the first pulley 213. A pull wire 26 is wound between the first baffle 24 and the second baffle 27. A coil spring 29 is sleeved on the outer side of the first rotating shaft 23, and the two ends of the coil spring 29 are respectively connected to the first baffle 24 and one side of the limiting groove 25. When the second baffle 27 rotates, the pull wire 26 connected to one side of the second baffle 27 is wound around its outer side, which compresses the coil spring 29 and makes the connecting wire 26 fixed on one side of the pull wire 26 The connecting plate 211 drives the shielding layer 212 to move along the pull wire 26. The shielding layer 212 is wrapped around the outside of the first rotating shaft 23. One end of the shielding layer 212 is fixed with a connecting plate 211 connected to one side of the pull wire 26, so that the shielding layer 212 covers the top of the experimental table body 1 to prevent the harmful gases generated in the experiment from floating in the laboratory and preventing the dangerous gases from causing harm to the workers. The top of the gear rod 21 is fixed to the bottom of the experimental table body 1, and the two ends of the first rotating shaft 23 are rotatably connected to the inner side of the limit groove 25 through bearings.
[0039] The model of the formaldehyde detection sensor 9 is: 4CH2O;
[0040] The model of the ammonia detection sensor 10 is: S4-NH3;
[0041] The model of the carbon monoxide detection sensor 11 is: S4-CO;
[0042] The model of the carbon dioxide detection sensor 12 is: VMS-3002-GZ;
[0043] The model of the oxygen detection sensor 13 is: FS01500;
[0044] The model of the hydrogen sulfide detection sensor 14 is: 4H2S;
[0045] The model of PLC controller 3 is: S7-1200.
[0046] Working principle: When the laboratory table body 1 is needed, the staff can place instruments on the top of the laboratory table body 1 for experiments, and auxiliary supplies for experiments can be placed inside the drawer 15. When dangerous gases that affect the health of the staff are generated during the experiment, the formaldehyde detection sensor 9, the ammonia detection sensor 10, the carbon monoxide detection sensor 11, the carbon dioxide detection sensor 12, the oxygen detection sensor 13 and the hydrogen sulfide detection sensor 14 detect the gas throughout the experiment. When the above gases are found, the signal is transmitted to the PLC controller 3 to remind the staff to leave the vicinity of the laboratory table body 1 to avoid the dangerous gas from causing harm to the body;
[0047] The PLC controller 3 outputs electrical signals to the alarm light 4, the fan 6 and the electric cylinder 7 respectively. The alarm light 4 generates sound and light prompts, firstly notifying the staff that they need to leave the vicinity of the laboratory table body 1 to avoid physical injuries caused by dangerous gases. Secondly, the fan 6 starts to work, and a negative pressure is generated at the air inlet end of the fan 6, which sucks the dangerous gases generated on the upper side of the laboratory table body 1 into the inner side of the activated carbon filter 5, and the toxic and harmful gases are filtered through the activated carbon filter 5 to avoid toxic and harmful dangerous gases from causing air pollution inside the laboratory and protect the environment of the laboratory.
[0048] Finally, when the push rod end of the electric cylinder 7 retracts, the gear rod 21 is driven to move downward, and at the same time, the gear rod 21 is meshed with the two gears 22, so that the two gears 22 rotate. When the gear 22 rotates, it drives the second rotating shaft 28 to rotate, and at the same time drives the second pulley 214 to rotate. Under the action of the belt, the first pulley 213 and the second baffle 27 are driven to rotate. When the second baffle 27 rotates, the pull wire 26 connected to one side of the second baffle 27 is wrapped around its outer side, so that the coil spring 29 is compressed, and at the same time, the connecting plate 211 fixed on one side of the pull wire 26 drives the shielding layer 212 to move along the pull wire 26, so that the shielding layer 212 covers the top of the experimental table body 1, so as to prevent the harmful gases generated in the experiment from floating in the laboratory, and to prevent the dangerous gases from causing harm to the workers, thereby protecting the safety of the laboratory air environment to the greatest extent.
[0049] So far, the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.
[0050] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.
[0051] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A laboratory bench hazardous gas detection device, comprising a laboratory bench body (1), characterized in that: A fixing frame (8) is sleeved on the outside of the experimental table body (1); a formaldehyde detection sensor (9), an ammonia detection sensor (10), a carbon monoxide detection sensor (11), a carbon dioxide detection sensor (12), an oxygen detection sensor (13) and a hydrogen sulfide detection sensor (14) are respectively installed on one side of the top of the experimental table body (1); a plurality of drawers (15) are installed on one side of the experimental table body (1); a PLC controller (3) is fixed on the inner wall of the fixing frame (8); an alarm light (4) is installed on the outside of the fixing frame (8); and a shielding component (2) is provided on one side of the experimental table body (1); The shielding assembly (2) comprises a gear rod (21) and two first rotating shafts (23); the outer side of the gear rod (21) is meshingly connected with two gears (22); and the outer sides of the first rotating shafts (23) are respectively fixedly sleeved with first baffles (24).
2. The test bench hazardous gas detection device according to claim 1, characterized in that: An activated carbon filter (5) is fixed on the inner wall of the fixing frame (8), and the air inlet end of the activated carbon filter (5) is connected to the top side of the experimental table body (1) through an air pipe.
3. The test bench dangerous gas detection device according to claim 2 is characterized in that: The air inlet end of the activated carbon filter (5) is connected to a fan (6) through an air pipe, and a plurality of electric cylinders (7) are fixed to the bottom of the inner wall of the fixing frame (8), and the push rod end of the electric cylinder (7) is fixed to the bottom of the experimental table body (1).
4. The test bench dangerous gas detection device according to claim 3 is characterized by: The output ends of the formaldehyde detection sensor (9), the ammonia detection sensor (10), the carbon monoxide detection sensor (11), the carbon dioxide detection sensor (12), the oxygen detection sensor (13) and the hydrogen sulfide detection sensor (14) are electrically connected to the input end of the PLC controller (3), and the output end of the PLC controller (3) is electrically connected to the input ends of the alarm light (4), the fan (6) and the electric cylinder (7), respectively.
5. The laboratory bench dangerous gas detection device according to claim 1, characterized in that: A second rotating shaft (28) is fixedly inserted at the axis of the two gears (22), and a second belt pulley (214) is fixedly sleeved on the outer side of the two second rotating shafts (28). The second belt pulley (214) is connected to the first belt pulley (213) via a belt, and the two ends of the second rotating shaft (28) are rotatably connected to the inner side of the limiting groove (25) via bearings.
6. The test bench dangerous gas detection device according to claim 5, characterized in that: Limiting grooves (25) are provided around the inner wall of the fixing frame (8), and the inner wall of the limiting groove (25) is rotatably connected to a third rotating shaft (210) via a bearing.
7. The test bench dangerous gas detection device according to claim 6 is characterized by: A second baffle (27) is fixed to one end of the third rotating shaft (210), and the axis center of one side of the second baffle (27) is fixed to the axis center of the first pulley (213).
8. The test bench dangerous gas detection device according to claim 7 is characterized by: A pull wire (26) is wound between the first baffle plate (24) and the second baffle plate (27), a coil spring (29) is sleeved on the outer side of the first rotating shaft (23), and two ends of the coil spring (29) are respectively connected to the first baffle plate (24) and one side of the limiting groove (25).
9. The test bench dangerous gas detection device according to claim 8, characterized in that: A shielding layer (212) is wound around the outside of the first rotating shaft (23), and a connecting plate (211) connected to one side of the pull wire (26) is fixed to one end of the shielding layer (212).
10. The laboratory bench dangerous gas detection device according to claim 1, characterized in that: The top of the gear rod (21) is fixed to the bottom of the experimental table body (1), and the two ends of the first rotating shaft (23) are rotatably connected to the inner side of the limiting groove (25) through bearings.