Toxic gas detector with filtering structure

Abstract

The utility model provides a poisonous gas detector with a filtering structure, which belongs to the technical field of detectors and comprises a shell, a control mainboard and a detection module electrically connected with the control mainboard are arranged in the shell, an air inlet is arranged at one end of the shell, a filtering component, a delivery pump and a detection probe are arranged on one side of the air inlet, and the detection probe is arranged on the other side of the air inlet. The filtering assembly comprises two groups of filtering columns connected in parallel, an outlet of the filtering assembly is connected with an inlet of the conveying pump, an inlet of the filtering assembly is connected with an air inlet pipeline through the switching assembly, an outlet of the conveying pump is connected with the detection probe, and the detection probe is electrically connected with the detection module. According to the device, two groups of filtering columns which are connected in parallel and a switching assembly are arranged, so that a user can select a proper filtering column to filter gas according to components of toxic gas in different detection environments; and the adaptability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of detection instrument technology, and more specifically, it relates to a toxic gas detector with a filtration structure. Background Technology

[0002] Toxic gas detectors, as a commonly used safety monitoring device, are widely used to monitor the concentration of toxic gases in the environment, so that users can understand the environmental conditions in a timely manner and ensure personnel safety and normal production. In the detection environment, in addition to the target toxic gas, there are also a variety of other gas components. These gases may interfere with the detection, so they need to be filtered. However, most traditional toxic gas detectors can only detect one specific toxic gas, which means that in environments containing multiple toxic gases, multiple detectors of different types are needed to meet the detection requirements. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a toxic gas detector with a filtration structure. This solves the problem that most traditional toxic gas detectors can only detect one specific toxic gas, leading to the need for multiple detectors of different types to meet detection requirements in environments containing multiple toxic gases.

[0004] The purpose and effectiveness of this utility model's toxic gas detector with a filtration structure are achieved through the following specific technical means:

[0005] A toxic gas detector with a filtration structure includes a housing, within which a control motherboard and a detection module electrically connected to the control motherboard are housed. One end of the housing has an air inlet, and a filter assembly, a delivery pump, and a detection probe are located on one side of the air inlet. The filter assembly includes two sets of filter columns connected in parallel. The outlet of the filter assembly is connected to the inlet of the delivery pump, and the inlet of the filter assembly is connected to the air inlet pipe via a switching assembly. The outlet of the delivery pump is connected to the detection probe, and the detection probe is electrically connected to the detection module.

[0006] According to a preferred embodiment, the filter assembly further includes a filter housing, which is a hollow columnar structure. Two sets of air inlets are provided at one end of the filter housing, and the two sets of filter columns are placed inside the air inlets. An air outlet is provided at the bottom of the filter housing.

[0007] According to a preferred embodiment, the filter column includes, from the outside to the inside, a protective mesh layer, an adsorption layer, and a support frame. The protective mesh layer wraps around both ends of the filter column, the adsorption layer fills the spaces between the protective mesh layers, and the support frame is located within the adsorption layer.

[0008] According to a preferred embodiment, the filter layer of one set of filter columns is composed of activated carbon and activated alumina, and the filter layer of the other set of filter columns is composed of molecular sieves.

[0009] According to a preferred embodiment, the switching component includes a two-position three-way valve and a throttle valve. The three ports of the two-position three-way valve are respectively connected to the air inlet and the two sets of filter columns. The throttle valve is located between the delivery pump and the detection probe and is connected to the pipeline between the delivery pump and the detection probe.

[0010] According to a preferred embodiment, the delivery pump, the two-position three-way valve, and the throttle valve are electrically connected to the control main board.

[0011] According to a preferred embodiment, the housing is provided with a cover plate, the cover plate is provided with a display screen and control buttons, the housing is also provided with a power supply, and the control motherboard is electrically connected to the power supply, the display screen and the control buttons respectively.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, by setting up two sets of parallel filter columns and a switching component, allows users to select the appropriate filter column for gas filtration based on the composition of toxic gases in different detection environments. This enhances the adaptability of the device. When detecting complex environments containing multiple toxic gases, users can switch between filter columns with activated carbon and activated alumina filter layers or those with molecular sieve filter layers by controlling a two-position three-way valve to specifically remove different types of interfering gases. This eliminates the need for users to equip themselves with multiple detectors of different types, meeting the detection needs for various toxic gases and improving the device's detection capability in complex environments.

[0014] 2. When using this device, users can operate the detector via control buttons to set detection parameters, switch filter columns, etc., making operation more convenient and improving the device's usability. Furthermore, through the electrical connection between the control motherboard and various components, the device can coordinate the operation of each component. For example, based on information from the detection module, the control motherboard adjusts the throttle valve opening to ensure a stable gas flow rate into the detection probe, thereby improving the accuracy of the detection results, providing users with environmental monitoring data, and enhancing the reliability of the device's detection results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0017] Figure 3 yes Figure 2 Enlarged view of region a in the middle;

[0018] Figure 4 This is a schematic diagram of the two-position three-way valve of this utility model.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 11. Outer casing; 12. Control main board; 13. Detection module; 14. Filter housing; 15. Filter column; 16. Protective mesh layer; 17. Adsorption layer; 18. Support frame; 19. Delivery pump; 21. Detection probe; 22. Two-position three-way valve; 23. Throttling valve; 24. Cover plate; 25. Display screen; 26. Control buttons; 27. Power supply. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0022] Example:

[0023] like Figures 1 to 4As shown, this utility model provides a toxic gas detector with a filtration structure, including a housing 11. Inside the housing 11 is a control motherboard 12 and a detection module 13 electrically connected to the control motherboard 12. The control motherboard 12 can be an STM32F407VET6 model; the detection module 13 can be an MQ-135 model. Through the configuration of the control motherboard 12, the operation of the entire detector can be centrally controlled and data processed, coordinating the collaborative work of various components. The detection module 13 is electrically connected to the control motherboard 12. Through the configuration of the detection module 13, it can sense and detect toxic gases in the environment, converting the gas information into electrical signals and transmitting them to the control motherboard 12 for analysis and processing. One end of the housing 11 has an air inlet, and on one side of the air inlet are a filter assembly, a delivery pump 19, and a detection probe 21. The air inlet allows the gas to be detected to enter the detector, initiating the detection process. The filter assembly includes two sets of filter columns 15 connected in parallel. This arrangement provides diverse filtration options for different types of toxic gases and impurities, enhancing the detector's adaptability to complex gas environments. The filter assembly outlet is connected to the inlet of a delivery pump 19. The delivery pump 19 generates power to deliver the filtered gas to the detection probe 21 for detection, ensuring gas flow within the detector. The filter assembly inlet is connected to the inlet pipe via a switching assembly consisting of a two-position three-way valve 22 and a throttle valve 23. This switching assembly allows for switching between different filtration methods by controlling the connection between the inlet and different filter columns 15 according to detection requirements. The delivery pump 19 outlet is connected to the detection probe 21, which is electrically connected to the detection module 13. The detection probe 21 detects the components and concentrations of toxic gases in the gas delivered by the delivery pump 19 and transmits the detected analog signal to the detection module 13 for further processing. The detection probe 21 can be an X-am5600 series model.

[0024] like Figure 2 , 3 As shown, the filter assembly also includes a filter housing 14, which is a hollow cylindrical structure. The filter housing 14 provides protection and installation space for the filter columns 15, while also guiding the gas to enter and exit the filter assembly in an orderly manner. Two sets of air inlets are provided at one end of the filter housing 14, and two sets of filter columns 15 are placed inside these inlets. The two sets of air inlets on the filter housing 14 allow for the connection of two sets of filter columns 15, enabling the gas to selectively enter different filter columns 15 for filtration. An air outlet is provided at the bottom of the filter housing 14. This air outlet allows the gas filtered by the filter columns 15 to flow smoothly out of the filter assembly and into the delivery pump 19.

[0025] The filter column 15 comprises, from the outside in, a protective mesh layer 16, an adsorption layer 17, and a support frame 18. The protective mesh layer 16 wraps around both ends of the filter column 15, preventing larger particles from entering the filter column 15, protecting the adsorption layer 17 and the support frame 18, and extending the service life of the filter column 15. The adsorption layer 17 fills the spaces between the protective mesh layers 16. Through its internal materials such as activated carbon, activated alumina, or molecular sieves, the adsorption layer 17 adsorbs and removes toxic gas components and impurities from the gas, purifying the gas to be tested. The support frame 18 is located within the adsorption layer 17. The support frame 18 provides structural support for the adsorption layer 17, ensuring that it maintains a stable shape under gas pressure, thus guaranteeing the filtration effect.

[0026] One set of filter columns 15 has a filter layer composed of activated carbon and activated alumina, while the other set has a filter layer composed of molecular sieves. By combining different filter layer materials, different types of toxic gases can be filtered. Activated carbon and activated alumina can remove sulfides, while molecular sieves have a good adsorption effect on small molecule polar gases such as methane, improving overall filtration efficiency and targeting.

[0027] like Figure 2 , 3 As shown in Figure 4, the switching assembly includes a two-position three-way valve 22 and a throttle valve 23. The three ports of the two-position three-way valve 22 are connected to the air inlet and two sets of filter columns 15, respectively. The two-position three-way valve 22 allows for switching of the air path between the air inlet and the two sets of filter columns 15, enabling the selection of a suitable filter column 15 for gas filtration based on the actual detection conditions. The throttle valve 23 is located between the delivery pump 19 and the detection probe 21, and is connected to the pipeline connecting the delivery pump 19 and the detection probe 21. The throttle valve 23 allows for adjustment of the gas flow rate entering the detection probe 21, ensuring that the detection probe 21 operates at a stable gas flow rate and improving the accuracy of the detection results.

[0028] The delivery pump 19, the two-position three-way valve 22, and the throttle valve 23 are electrically connected to the control main board 12. This electrical connection enables the control main board 12 to control the delivery pump 19, the two-position three-way valve 22, and the throttle valve 23, coordinating the operation of each component according to the testing requirements to achieve automated operation of the testing instrument.

[0029] The outer casing 11 is equipped with a cover plate 24, on which a display screen 25 and control buttons 26 are mounted. A power supply 27 is also located inside the casing 11. The main control board 12 is electrically connected to the power supply 27, the display screen 25, and the control buttons 26. The cover plate 24, display screen 25, control buttons 26, and power supply 27 provide a user interface and information display window. Users can operate the detector via the control buttons 26, the display screen 25 shows detection data and other information, and the power supply 27 provides the energy required for the entire detector to operate.

[0030] The specific usage and function of this embodiment are as follows:

[0031] In use, first turn on the power switch on the cover plate 24 of the outer casing 11. The power supply 27 powers the entire detector, and the control mainboard 12 starts self-testing and initialization. Toxic gas enters from one end of the outer casing 11 through the air inlet. The control mainboard 12 operates the two-position three-way valve 22 to select the filter column 15 according to the preset or user input command via the control button 26. If the environment may contain more sulfides, the filter column 15 with a filter layer composed of activated carbon and activated alumina is selected. If it may contain more small molecule polar gases such as methane, the filter column 15 with a filter layer composed of molecular sieves is selected. The gas enters the filter column 15, first passes through the protective mesh layer 16 to block large particulate impurities, and then the adsorption layer 17 adsorbs toxic components and impurities. The support frame 18 maintains the structural stability of the adsorption layer 17. After filtration, the gas flows out from the air outlet at the bottom of the filter casing 14 to the delivery pump 19. The delivery pump 19 delivers air to the detection probe 21. The control board 12 adjusts the throttle valve 23 to control the airflow speed. The detection probe 21 detects the air and transmits the analog signal to the detection module 13. After processing, the data is transmitted back to the control board 12. Finally, the control board 12 displays the detection data on the display screen 25, allowing the user to intuitively obtain information and perform operations such as viewing historical data through the control buttons 26.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A toxic gas detector with filtering structure, comprising a shell (11), a control mainboard (12) and a detection module (13) electrically connected to the control mainboard (12) are arranged in the shell (11), characterized in that: The outer casing (11) has an air inlet at one end. A filter assembly, a delivery pump (19), and a detection probe (21) are provided on one side of the air inlet. The filter assembly includes two sets of filter columns (15) connected in parallel. The outlet of the filter assembly is connected to the inlet of the delivery pump (19). The inlet of the filter assembly is connected to the air inlet pipe through a switching assembly. The outlet of the delivery pump (19) is connected to the detection probe (21). The detection probe (21) is electrically connected to the detection module (13).

2. The toxic gas detector with filtering structure according to claim 1, characterized in that: The filter assembly also includes a filter housing (14), which is a hollow columnar structure. Two sets of air inlets are opened at one end of the filter housing (14), and the two sets of filter columns (15) are placed inside the air inlets. An air outlet is provided at the bottom of the filter housing (14).

3. The toxic gas detector with filtering structure according to claim 2, characterized in that: The filter column (15) includes a protective mesh layer (16), an adsorption layer (17), and a support frame (18) from the outside to the inside. The protective mesh layer (16) wraps around both ends of the filter column (15), the adsorption layer (17) fills the space between the protective mesh layers (16), and the support frame (18) is located inside the adsorption layer (17).

4. The toxic gas detector with filtering structure according to claim 3, characterized in that: One set of filter columns (15) has a filter layer composed of activated carbon and activated alumina, while the other set of filter columns (15) has a filter layer composed of molecular sieves.

5. The toxic gas detector with filtering structure according to claim 1, characterized in that: The switching assembly includes a two-position three-way valve (22) and a throttle valve (23). The three ports of the two-position three-way valve (22) are respectively connected to the air inlet and the two sets of filter columns (15). The throttle valve (23) is located between the delivery pump (19) and the detection probe (21) and is connected to the pipeline between the delivery pump (19) and the detection probe (21).

6. The toxic gas detector with filtering structure according to claim 5, characterized in that: The delivery pump (19), the two-position three-way valve (22), and the throttle valve (23) are electrically connected to the control main board (12).

7. The toxic gas detector with filtering structure according to claim 1, characterized in that: The outer casing (11) is provided with a cover plate (24), and the cover plate (24) is provided with a display screen (25) and a control button (26). The outer casing (11) is also provided with a power supply (27). The control motherboard (12) is electrically connected to the power supply (27), the display screen (25) and the control button (26) respectively.

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