A gas monitoring device with quick-release filter element and back-flushing soot cleaning structure

Abstract

The utility model relates to a kind of gas monitoring devices with quick-release filter core and back blow ash cleaning structure, belong to environmental monitoring equipment technical field, to solve the problem of existing gas monitoring device filter core easy to block, replacement maintenance difficulty.This gas monitoring device with quick-release filter core and back blow ash cleaning structure includes detector main body and filter component, gas sensor, main control board, main air inlet channel and back blow ash cleaning component are equipped in detector main body;Filter component is detachably connected in the air inlet end of detector main body by quick-release mechanism;The back blow ash cleaning component includes back blow air pump and gas path switch valve, can be under the control of main control board, realize the reverse blow ash cleaning of filter core in filter component.This gas monitoring device with quick-release filter core and back blow ash cleaning structure realizes the automatic maintenance of device by integrated back blow ash cleaning function, prolongs filter core life;Meanwhile, quick-release mechanism simplifies the replacement operation of filter core, significantly improves the reliability of monitoring and the convenience of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring equipment technology, and in particular to a gas monitoring device that can automatically clean dust and is easy to maintain. Background Technology

[0002] Fixed gas monitoring devices are widely used in chemical, metallurgical, and environmental protection fields to monitor the concentration of specific gases in real time. These devices typically have a filter at the air inlet to prevent dust, moisture, and other impurities from entering and contaminating or damaging the internal, delicate gas sensor. However, in working environments with high dust concentrations, the filter can quickly become clogged, leading to insufficient air intake and severely affecting the accuracy and real-time performance of the monitoring.

[0003] Currently, resolving filter clogging issues mainly relies on regular manual maintenance. Maintenance personnel need to carry tools and disassemble the device's filter cover and replace the filter element in high-altitude or hazardous environments. The entire process is cumbersome, time-consuming, labor-intensive, and carries certain safety risks.

[0004] Therefore, simplifying the maintenance process and proactively alleviating filter clogging are urgent technical problems to be solved in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gas monitoring device with a quick-release filter element and a backflushing cleaning structure, which aims to realize quick tool-free replacement of the filter element and automated backflushing cleaning, thereby improving maintenance efficiency and monitoring reliability.

[0006] To address the aforementioned technical issues, this gas monitoring device, equipped with a quick-release filter and backflushing cleaning structure, includes a main body and a filter assembly. The main body houses a gas sensor and a main control board. A digital display screen is located at the front end of the main body. The gas sensor and the digital display screen are connected to the signal input and output terminals of the main control board, respectively. The main control board receives and processes the signals collected by the gas sensor and drives the digital display screen to display the final concentration value. The main body of this gas monitoring device includes a main air intake channel and a backflushing cleaning assembly. The filter assembly is detachably connected to the air intake end of the main body via a quick-release mechanism. The backflushing cleaning assembly communicates with the main air intake channel and is used to perform reverse air blowing cleaning on the filter assembly installed on the main body from the inside out. The backflushing cleaning assembly includes a backflushing air pump and a gas path switching valve. The gas path switching valve has at least two switching positions: a first switching position connects the main air intake channel to the gas sensor, and a second switching position connects the backflushing air pump to the main air intake channel.

[0007] Furthermore, the gas path switching valve is a three-way solenoid valve. The first inlet of the three-way solenoid valve is connected to the main air intake channel, the second inlet of the three-way solenoid valve is connected to the outlet of the backflush pump, and the outlet of the three-way solenoid valve is connected to the gas sensor. When the three-way solenoid valve is de-energized, the first inlet and the outlet are connected. When the three-way solenoid valve is energized, the second inlet and the first inlet are connected, and the outlet to the gas sensor is closed.

[0008] Furthermore, the filter assembly includes a filter cover and a filter element disposed within the filter cover; when the filter assembly is installed on the main body of the detector, the air outlet end of the filter element is aligned with the inlet of the main air intake channel; the quick-release mechanism includes a slot disposed at the air intake port of the main body of the detector, a sealing gasket disposed below the slot edge, and a slot edge disposed at the port of the filter assembly, wherein the slot edge and the slot are engaged or disengaged by elastic fastening.

[0009] Furthermore, the control output terminal of the main control board is connected to the signal input terminal of the back-flushing air pump and air path switching valve of the back-flushing cleaning component, and is used to start the back-flushing cleaning component to work according to the preset acquisition time period or according to the change in air intake flow detected by the gas sensor.

[0010] This utility model discloses a gas monitoring device with a quick-release filter element and a backflushing cleaning structure. The integrated backflushing cleaning function enables automatic maintenance of the device, extending the filter element's lifespan. Simultaneously, the quick-release mechanism simplifies filter element replacement, significantly improving monitoring reliability and maintenance convenience. Specifically, (1) The built-in back-blowing dust removal component can automatically blow air in reverse according to the preset program to remove the attached dust, effectively alleviate the clogging of the filter element, thereby extending the effective service life of the filter element and reducing the frequency of manual maintenance.

[0011] (2) By actively cleaning the dust, the air intake channel is kept open for a long time, avoiding the reduction in air intake and response delay caused by filter blockage, thereby ensuring the accuracy and reliability of gas monitoring data.

[0012] (3) The filter components are connected by a quick-release mechanism, so that no tools are needed when replacing the filter element. Maintenance personnel can quickly complete the disassembly and assembly by hand, which greatly simplifies the operation, shortens the maintenance downtime, and improves work efficiency. It is especially suitable for equipment maintenance in high-altitude or harsh environments. Attached Figure Description

[0013] The following description, in conjunction with the accompanying drawings, further illustrates a gas monitoring device of the present invention that features a quick-release filter element and a backflushing cleaning structure: Figure 1 This is a schematic diagram of the planar structure of a gas monitoring device with a quick-release filter and a backflushing cleaning structure; Figure 2 yes Figure 1 A three-dimensional structural diagram; Figure 3 yes Figure 2 Exploded view (looking down); Figure 4 yes Figure 2 Exploded view (top view); Figure 5 This is a schematic diagram of the internal structure of the main body of the detector; Figure 6 This is a wireframe diagram illustrating the logic structure and connection principle of the main control board.

[0014] In the picture: 1-Main body of the detector; 11-Gas sensor; 12-Digital display screen; 13-Main control board; 111-Detection outlet; 112-Dustproof net; 2-Filter assembly; 21-Filter cover; 22-Filter element; 3-Main intake passage; 4-Backflush cleaning assembly; 41-Backflush air pump; 42-Air path switching valve; 411-Backflush air inlet; 412-Air inlet filter cap; 5-Quick release mechanism; 51-Slot, 52-Slot edge, 53-Sealing gasket. Detailed Implementation

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0016] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0018] Implementation method 1: such as Figure 1As shown, similar to existing products, this gas monitoring device with quick-release filter and backflushing cleaning structure includes a detector body 1 and a filter assembly 2. The detector body 1 is equipped with a gas sensor 11 and a main control board 13. The front end of the detector body 1 is equipped with a digital display screen 12. The gas sensor 11 and the digital display screen 12 are respectively connected to the signal input and output terminals of the main control board 13. The main control board 13 is responsible for receiving and processing the signals collected by the sensor 11 and driving the digital display screen 12 to display the final concentration value. Furthermore, the gas monitoring device with quick-release filter and back-flushing cleaning structure has a main air intake channel 3 and a back-flushing cleaning assembly 4 inside the detector body 1. The filter assembly 2 is detachably connected to the air intake end of the detector body 1 via a quick-release mechanism 5. The back-flushing cleaning assembly 4 is connected to the main air intake channel 3 and is used to perform reverse air blowing cleaning on the filter assembly 2 installed on the detector body 1 from the inside out. The back-flushing cleaning assembly 4 includes a back-flushing air pump 41 and an air path switching valve 42. The air path switching valve 42 has at least two switching positions. The first switching position is used to connect the main air intake channel 3 and the gas sensor 11, and the second switching position is used to connect the back-flushing air pump 41 and the main air intake channel 3. By controlling the air path switching valve 42 to switch between the two switching positions, it is possible to connect the main air intake channel 3 and the gas sensor 11 during normal monitoring, and connect the back-flushing air pump 41 and the main air intake channel 3 during cleaning, thereby realizing reverse air blowing on the filter assembly 2. To ensure the cleanliness of the gas used for backflushing and to protect the backflushing air pump 41, a backflushing air inlet 411 is provided on the main body 1 of the detector for the backflushing air pump 41. This inlet 411 is equipped with an air inlet filter cap 412 filled with filter cotton for preliminary filtration of air drawn in from outside the device. Simultaneously, to ensure continuous gas renewal through the gas sensor 11 and prevent the formation of "stagnant gas" within the sensor chamber that could affect detection, a detection outlet 111 is also provided on the main body 1 downstream of the gas sensor 11. This outlet 111 is equipped with a dustproof net 112 to prevent insects or debris from flowing back into the device. In this embodiment, gas flow is achieved through natural diffusion. After the gas to be tested enters the main air inlet channel 3 through the filter assembly 2, it slowly flows through the cavity containing the gas sensor 11 due to the free movement of gas molecules and the slight pressure difference between the inside and outside of the device, and is finally discharged through the detection outlet 111. The advantage of this method is its simple structure and no additional energy consumption during operation, making it suitable for monitoring scenarios where the response speed to changes in gas concentration is not critical.

[0019] Implementation method 2: such as Figure 1As shown, the gas monitoring device with quick-release filter and backflushing cleaning structure uses a three-way solenoid valve as its gas path switching valve 42. The first inlet of the three-way solenoid valve is connected to the main air intake channel 3, the second inlet is connected to the outlet of the backflushing air pump 41, and the outlet is connected to the gas sensor 11. When the three-way solenoid valve is de-energized, the first inlet and outlet are connected; when the three-way solenoid valve is energized, the second inlet and the first inlet are connected, while the outlet to the gas sensor 11 is closed. Precise switching of the gas path can be achieved by controlling the energization and de-energization of its solenoid coil. In the default de-energized state, the first inlet and outlet are connected, ensuring the normal monitoring function of the device; when cleaning is required, energizing the solenoid valve switches the connection between the second inlet and the first inlet, while simultaneously closing the outlet to the sensor to prevent high-pressure airflow from impacting the sensor.

[0020] Implementation method 3: such as Figure 1 As shown, the gas monitoring device with quick-release filter element and backflushing cleaning structure includes a filter cover 21 and a filter element 22 disposed within the filter cover 21. When the filter element 2 is installed on the detector body 1, the air outlet end of the filter element 22 is aligned with the inlet of the main air inlet channel 3. The quick-release mechanism 5 includes a slot 51 disposed at the air inlet port of the detector body 1, a sealing gasket 52 disposed below the slot edge, and a slot edge 53 disposed at the port of the filter element 2. The slot edge 53 and the slot 51 are engaged or disengaged through elastic snap-fit. During installation, simply align the slot edge 53 of the filter element 2 with the slot 51 and press it in firmly. A secure snap-fit ​​connection can be achieved through elasticity and interference fit. During disassembly, simply pull it out. The sealing gasket 52 below the slot 51 is used to ensure airtightness after installation. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0021] Implementation method 4: such as Figure 1As shown, the control output terminal of the main control board 13 of this gas monitoring device with quick-release filter element and backflushing cleaning structure is connected to the signal input terminals of the backflushing air pump 41 and the air path switching valve 42 of the backflushing cleaning assembly 4. This connection is used to activate the backflushing cleaning assembly 4 according to a preset data acquisition period or based on changes in the intake air flow detected by the gas sensor 11. The main control board 13 not only processes monitoring signals but also acts as the controller for backflushing cleaning. Its control output terminals are connected to the electrical control terminals of the backflushing air pump 41 and the air path switching valve 42, respectively. The main control board 13 can incorporate two triggering mechanisms to initiate the cleaning program: one is a time-based periodic trigger, for example, setting the program to automatically perform cleaning every 24 hours; the other is a condition-based intelligent trigger, where the main control board 13 analyzes the signal from the gas sensor 11, for example, by adding a micro-flow meter or analyzing the baseline change of the sensor response, to determine whether the intake air flow has significantly decreased. Once filter element blockage is detected, the cleaning program is immediately initiated. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0022] Implementation Method 5: To provide a specific and commercially viable preferred solution, the main control board 13 of this gas monitoring device with a quick-release filter and backflushing cleaning structure uses an STM32F103C8T6 microcontroller from STMicroelectronics. This microcontroller has strong processing power, abundant I / O ports, and is stable and reliable, sufficient to support data acquisition and backflushing cleaning logic control. The backflushing air pump 41 uses a KPV27A-6A miniature air pump from Shenzhen KOGE Micro Pump Co., Ltd. This model of air pump is characterized by its small size (easily integrated into the main body 1 of the detector), low power consumption, but relatively large outlet pressure and exhaust volume, making it very suitable for generating sufficient airflow impact force in a short time to backflush and clean the filter 22. The air path switching valve 42 uses a 3V1-M5 series miniature three-way solenoid valve from AirTAC. This model of solenoid valve has fast response speed, good sealing performance, and small size, and can reliably perform rapid switching of the air path. The filter element 22 can be made of sintered bronze powder, and its filtration accuracy can be selected according to the usage environment. For example, a 5μm pore size can be selected, which can effectively filter most industrial dust while ensuring smooth airflow. It should be noted that the control output terminal of the main control board 13 is connected to the power input terminal of the backflush pump 41 and the electromagnetic coil of the air path switching valve 42, thereby realizing the coordinated control of various components in the backflush cleaning assembly 4. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0023] Implementation Method 6: To adapt to operating environments with higher requirements for response speed and sampling stability, this gas monitoring device, equipped with a quick-release filter and backflushing cleaning structure, can be equipped with a sampling gas pump in the gas path. Specifically, the sampling gas pump can be installed between the gas sensor 11 and the gas outlet, and its electronic control terminal is connected to the main control board 13. During gas monitoring, the main control board 13 controls the sampling gas pump to start, actively drawing in external gas from the filter assembly 2, forcing it to flow through the gas sensor 11 at a relatively constant flow rate, and finally expelling it from the gas outlet. This pump-suction sampling ensures that the sensor can quickly and continuously contact the latest gas to be measured, thereby greatly improving the real-time performance and accuracy of the detection.

[0024] During operation: Under normal monitoring conditions, the external gas to be tested is first drawn into the filter assembly 2, and filtered by the filter element 22. The relatively clean gas enters the main body 1 of the detector through the main air intake channel 3. At this time, the gas path switching valve 42 is in the default power-off position, connecting the main air intake channel 3 with the gas sensor 11. The gas enters the sensor 11 for concentration detection. The main control board 13 collects and processes the signal from the sensor 11 in real time, and sends the converted concentration value to the digital display screen 12 for display. When the preset dust removal time is reached, or when the main control board 13 determines that the filter element 22 has become clogged, the automatic dust removal program is started. The main control board 13 first controls the gas path switching valve 42 to switch the gas path, disconnecting the main air intake channel 3 from the gas sensor 11, and simultaneously connecting the backflush pump 41 to the main air intake channel 3. Next, the main control board 13 starts the backflush air pump 41 for a few seconds, generating a strong reverse airflow. This airflow impacts the filter element 22 at high speed from the inside out through the main air intake channel 3, blowing off the dust adhering to its surface. After cleaning, the main control board 13 stops the air pump 41 and de-energizes and resets the air path switching valve 42, restoring the device to normal monitoring status. When the filter element 22 needs to be replaced due to aging, maintenance personnel do not need any tools. They only need to hold the filter assembly 2 by hand and pull it off the main body 1 of the detector to disengage the retaining edge 52 from the retaining slot 51, completing the disassembly. After replacing it with a new filter assembly, simply align it and press it firmly into place to complete the installation. The entire process is quick, safe, and efficient.

[0025] This gas monitoring device, equipped with a quick-release filter and backflushing cleaning structure, achieves automatic maintenance through its integrated backflushing cleaning function, extending filter life. Simultaneously, the quick-release mechanism simplifies filter replacement, significantly improving monitoring reliability and maintenance convenience. Specifically, (1) The built-in back-blowing dust removal component can automatically blow air in reverse according to the preset program to remove the attached dust, effectively alleviate the clogging of the filter element, thereby extending the effective service life of the filter element and reducing the frequency of manual maintenance.

[0026] (2) By actively cleaning the dust, the air intake channel is kept open for a long time, avoiding the reduction in air intake and response delay caused by filter blockage, thereby ensuring the accuracy and reliability of gas monitoring data.

[0027] (3) The filter components are connected by a quick-release mechanism, so that no tools are needed when replacing the filter element. Maintenance personnel can quickly complete the disassembly and assembly by hand, which greatly simplifies the operation, shortens the maintenance downtime, and improves work efficiency. It is especially suitable for equipment maintenance in high-altitude or harsh environments.

[0028] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas monitoring device with a quick-release filter element and a backflushing cleaning structure, comprising a detector body (1) and a filter assembly (2), wherein the detector body (1) is provided with a gas sensor (11) and a main control board (13), and a digital display screen (12) is provided at the front end of the detector body (1). The gas sensor (11) and the digital display screen (12) are respectively connected to the signal input terminal and the output terminal of the main control board (13). The main control board (13) receives and processes the signal collected by the gas sensor (11) and drives the digital display screen (12) to display the final concentration value. Its characteristic is: The detector body (1) is equipped with a main air intake channel (3) and a back-flushing cleaning assembly (4) inside. The filter assembly (2) is detachably connected to the air intake end of the detector body (1) via a quick-release mechanism (5). The backflush cleaning assembly (4) is connected to the main air intake channel (3) and is used to perform reverse air blowing cleaning on the filter assembly (2) installed on the detector body (1) from the inside out. The backflush cleaning assembly (4) includes a backflush air pump (41) and an air path switching valve (42). The air path switching valve (42) has at least two switching positions. The first switching position is used to connect the main air intake channel (3) and the gas sensor (11), and the second switching position is used to connect the backflush air pump (41) and the main air intake channel (3).

2. The gas monitoring device with quick-release filter element and back-flushing cleaning structure according to claim 1, characterized in that: The gas path switching valve (42) is a three-way solenoid valve. The first inlet of the three-way solenoid valve is connected to the main air intake channel (3), the second inlet of the three-way solenoid valve is connected to the outlet of the backflush pump (41), and the outlet of the three-way solenoid valve is connected to the gas sensor (11). When the three-way solenoid valve is de-energized, the first inlet and the outlet are connected. When the three-way solenoid valve is energized, the second inlet and the first inlet are connected, and the outlet leading to the gas sensor (11) is closed.

3. The gas monitoring device with quick-release filter element and back-flushing cleaning structure according to claim 2, characterized in that: The filter assembly (2) includes a filter cover (21) and a filter element (22) disposed inside the filter cover (21); when the filter assembly (2) is installed on the detector body (1), the air outlet of the filter element (22) is aligned with the inlet of the main air intake channel (3); the quick release mechanism (5) includes a slot (51) disposed at the air intake port of the detector body (1), a sealing gasket (52) disposed below the slot edge, and a slot edge (53) disposed at the port of the filter assembly (2), wherein the slot edge (53) and the slot (51) are engaged or disengaged by elastic fastening.

4. The gas monitoring device with quick-release filter element and backflushing cleaning structure according to claim 3, characterized in that: The control output terminal of the main control board (13) is connected to the signal input terminal of the back-blowing air pump (41) and the air path switching valve (42) of the back-blowing cleaning assembly (4), and is used to start the back-blowing cleaning assembly (4) according to the preset collection time period or according to the change in air intake flow detected by the gas sensor (11).

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