High-risk operation site gas accurate detection processing device and method

Abstract

The application discloses a kind of high-risk operation site gas precision detection processing equipment and method, it is related to gas detection technical field.The equipment of the present application includes filter cartridge, air inlet cover, air outlet cover, filter cartridge is equipped with vent plate and positioning lining frame, top side is equipped with drive box and electromagnetic module, movable plug-in gas flow regulating part, each cavity is configured turbidity sensor, three-way valve of detection, exhaust branch is connected to the air outlet end of gas pump, and the aperture intersection of adjusting plate and vent plate forms gradient lens-shaped air gap area.The equipment detection of the present application, electromagnetic module drives adjusting plate to form gradient air gap area, realize grading filtration, turbidity sensor real-time monitoring, purified gas is sent into detector;When equipment cleaning, electromagnetic module adjusts aperture coincidence, gas pump output pulse airflow discharges foreign matter, and stops after turbidity reaches standard.The present application realizes gas grading precision filtration, improves detection accuracy, can be automated high-efficiency self-cleaning, and is suitable for high-risk operation site limited space gas detection pretreatment.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to a device and method for precise gas detection and processing in high-risk workplaces. Background Technology

[0002] Gas detection in confined spaces in high-risk workplaces is a core aspect of safety management. Gas pretreatment, as a crucial step before detection, directly determines the accuracy of gas composition, concentration, and other indicators through its filtration effect. However, existing gas detection pretreatment devices, due to design flaws in the filtration and cleaning processes, are ill-suited to the complex detection needs of high-risk workplaces.

[0003] Existing devices generally use a fixed filtration structure with a single pore size, which cannot achieve gradient interception of dust and foreign objects of different particle sizes in the gas. Large-sized foreign objects are prone to clogging the filtration channel, while small-sized foreign objects can easily penetrate the filter layer and enter the gas detector, directly interfering with the accuracy of the detection data. In addition, the device does not have a turbidity monitoring component for the entire cavity, so it is impossible to judge the filtration effect in real time and it is difficult to ensure the cleanliness of the gas sent into the detector.

[0004] Meanwhile, the existing device's filter chamber lacks an automated cleaning mechanism. The foreign matter remaining after filtration requires manual disassembly of the parts for cleaning, which is cumbersome and inefficient. The disassembly process can also cause mechanical wear on the filter components. Furthermore, the airflow direction is not effectively isolated during cleaning, and foreign matter can easily enter the detection terminal with the airflow, causing equipment damage. The accumulation of foreign matter will also continuously reduce the device's filtration capacity, making it impossible for the device to work stably and continuously for a long time, which is difficult to meet the routine gas detection needs of high-risk workplaces.

[0005] Therefore, there is an urgent need to develop a gas detection pretreatment device that can achieve precise grading and filtration and is capable of automated and efficient self-cleaning, in order to solve the technical problems of insufficient detection accuracy and difficulty in continuous and stable operation of existing equipment. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention provides a gas precision detection and treatment device for high-risk workplaces, including a filter cylinder, an air inlet cover fixed to one end of the filter cylinder, and an air outlet cover fixed to the other end of the filter cylinder. The air outlet cover is connected to an air pump through a gas pipeline. Multiple ventilation plates are positioned and installed inside the filter cylinder. A positioning frame is fixedly installed on both sides of each ventilation plate. The ventilation plates have vertically penetrating gaps and multiple axial holes perpendicularly communicating with the gaps. The filter cylinder forms an air inlet chamber adjacent to the air inlet cover, a filter chamber between two adjacent ventilation plates, and an air outlet chamber adjacent to the air outlet cover.

[0008] A drive box is fixedly installed on the top side of the filter cartridge. The drive box has multiple magnetic slots, and an electromagnetic module is fixedly mounted on the top of each slot. Multiple airflow regulating components are movably inserted into the filter cartridge. Each airflow regulating component includes an adjusting plate that fits into the movable gap and a magnetic block that magnetically engages with the electromagnetic module. The adjusting plate has adjusting holes that intersect with the axial holes. The adjusting holes have the same diameter as the axial holes, and their intersection forms a lens-shaped air gap region. Based on the horizontal airflow direction, the downstream air gap region is smaller than the upstream air gap region. A turbidity sensor is installed in the inlet chamber, filter chamber, and outlet chamber of the filter cartridge. A three-way valve is installed at the outlet of the air pump. The three-way valve has a detection branch and an exhaust branch. The detection branch is connected to a gas detector and equipped with a first valve, while the exhaust branch is directly connected to the external environment and equipped with a second valve.

[0009] As a preferred embodiment of the device of the present invention: the air inlet cover is provided with an air inlet pipe communicating with the air inlet chamber, and the air outlet cover is provided with an air outlet pipe communicating with the air outlet chamber. The air outlet pipe is connected to the air pump inlet end via a flexible hose. The air inlet cover is provided with a first inner ring plate inserted into the air inlet chamber, and the first inner ring plate abuts against the positioning bushing of the air inlet chamber. The air outlet cover is provided with a second inner ring plate inserted into the air outlet chamber, and the second inner ring plate abuts against the positioning bushing at the position of the air outlet chamber.

[0010] As a preferred technical solution of the device of the present invention: the bottom plate of the air filter cylinder has multiple downward through holes, and the inner circumference of the bottom plate of the positioning liner is provided with an inner protrusion, and the inner protrusion is provided with a screw hole groove that matches the downward through holes.

[0011] As a preferred technical solution of the device of the present invention: multiple through holes are opened at the top of the air filter cylinder, and the top plate of the positioning liner is provided with insertion holes aligned with the through holes. The drive box is provided with multiple internal inserts passing through the through holes and insertion holes, and the turbidity sensor is embedded in the bottom surface of the internal inserts.

[0012] As a preferred technical solution of the device of the present invention: the adjustment plate and the magnetic block are fixedly connected by a connecting rod, and the magnetic block is movably arranged inside the magnetic suction groove.

[0013] As a preferred embodiment of the device of the present invention: the top plate of the air filter cylinder has multiple slots, and the adjusting plate moves through the slots and is inserted into the air filter cylinder. The drive box has a fixing bracket plate that completely covers the slots.

[0014] As a preferred technical solution of the device of the present invention: the structural dimensions of each vent plate are the same, the spacing between the multiple axial holes of the vent plate is the same, the spacing between the multiple adjustment holes of the adjustment plate is the same, and the spacing between adjacent axial holes is the same as the spacing between adjacent adjustment holes. Based on the horizontal flow direction of the airflow: the distance between the bottommost adjustment hole of the downstream adjustment plate and the bottom surface of the adjustment plate is less than the distance between the bottommost adjustment hole of the upstream adjustment plate and the bottom surface of the adjustment plate; the gap between the downstream magnetic block and the electromagnetic module is greater than the gap between the upstream magnetic block and the electromagnetic module.

[0015] As a preferred technical solution of the device of the present invention: let H be the distance between the bottommost adjustment hole of any adjustment plate and the bottom surface of the adjustment plate. When the bottom surface of the adjustment plate abuts against the top surface of the filter cylinder bottom plate, the distance between the magnetic block connected to the adjustment plate and the electromagnetic module directly above it is also H.

[0016] This invention provides a method for precise detection and treatment of gases in high-risk workplaces, including two modes: detection mode and cleanup mode, as detailed below:

[0017] I. Detection Mode:

[0018] (a) Open the first valve of the three-way valve detection branch, close the second valve of the exhaust branch, start the gas pump and gas detector, and put the device into the gas detection process.

[0019] (ii) When the electromagnetic module is energized, it generates a repulsive force, which causes the magnetic block to move the adjustment plate down and abut against the inner wall of the bottom plate of the air filter. At this time, the adjustment hole of the adjustment plate and the axial hole of the air vent plate intersect to form a lens-shaped air gap area, and the size of the downstream air gap area is smaller than that of the upstream air gap area.

[0020] (iii) The gas in the confined space enters the air inlet chamber of the filter cylinder from the air inlet cover, and flows through each filter chamber in sequence under the drive of the air pump, gradually passing through air gap areas of different sizes.

[0021] When the gas flows through the upstream air gap region, large foreign objects are intercepted and filtered. When it flows through the downstream air gap region, small foreign objects are further intercepted and filtered. The purified gas then enters the outlet chamber.

[0022] (iv) Turbidity sensors in the air inlet chamber, air filter chamber and air outlet chamber monitor the gas turbidity of the corresponding chamber in real time to provide data support for judging the filtration effect.

[0023] (v) The purified gas enters the detection branch of the three-way valve through the gas pump and finally flows into the gas detector, which detects and analyzes the gas.

[0024] II. Cleanup Mode:

[0025] (i) After the test is completed, or when the turbidity sensor in any cavity exceeds the preset reference turbidity, open the second valve of the exhaust branch, close the first valve of the test branch, and start the pulse airflow drive mode of the air pump.

[0026] (ii) When the electromagnetic module is powered on, it generates an attractive force, which causes the magnetic block to move the adjustment plate upward, so that the adjustment hole and the axial hole are completely aligned, increasing the gas flow channel.

[0027] (iii) When the external airflow enters the filter cylinder, the foreign matter remaining in the filter cylinder is driven and moves along the airflow direction under the action of the pulse airflow. It enters the next cavity through the overlapping axial hole and the adjustment hole, and is finally discharged from the exhaust branch.

[0028] (iv) Each turbidity sensor continuously monitors the gas turbidity of the corresponding cavity. When the turbidity of all cavities is less than the preset reference turbidity and remains stable within the set time, the air pump stops working, the electromagnetic module is powered off, and the cleaning operation is completed.

[0029] Compared with existing technologies, the beneficial effects of this invention are:

[0030] 1. This invention uses an electromagnetically controlled regulating plate and a ventilation plate to form a gradient lens-shaped air gap region with a larger upstream and smaller downstream, which intercepts and filters foreign objects of different particle sizes in the gas step by step. In conjunction with turbidity sensors in the inlet chamber, filter chamber, and outlet chamber, the filtration effect is monitored in real time throughout the entire cavity. At the same time, the detection mode is matched with stable airflow parameters to avoid interference from particulate matter with the gas detector. This enables graded and precise filtration of gases in high-risk workplaces and significantly improves the accuracy of gas detection.

[0031] 2. This invention increases the flow channel by ensuring that the electromagnetic control adjustment hole and the axial hole are completely aligned. Combined with pulsed high-pressure airflow to impact and remove residual foreign matter inside the filter cartridge, the cleaning process is automatically triggered based on the turbidity threshold. During cleaning, the airflow direction is separated from the detection mode to prevent foreign matter from entering the detector. No manual disassembly and cleaning are required, which improves cleaning efficiency, reduces equipment wear and tear, and extends the overall service life of the device. This achieves automated and efficient self-cleaning of the filter cartridge, ensuring continuous and stable operation of the equipment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the air filter cartridge of the present invention.

[0033] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the filter cartridge of the present invention during gas filtration.

[0034] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0035] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the filter cartridge of the present invention during internal cleaning.

[0036] Figure 5 This is a schematic diagram of the component disassembly structure of the device of the present invention.

[0037] Figure 6 for Figure 5 A schematic diagram of the internal cross-sectional structure of the middle component insertion.

[0038] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the drive box and airflow regulating component in this invention.

[0039] Figure 8 This is a schematic diagram of the internal cross-sectional structure of the air filter and air inlet cover in this invention.

[0040] Figure 9 This is a schematic diagram of the internal cross-sectional structure of the positioning liner, vent plate, and vent cover in this invention.

[0041] Figure 10 This is a schematic diagram of the structure of the air filter cartridge used in conjunction with the air pump and gas detector in this invention.

[0042] Wherein: 1-Air filter cylinder, 101-Air inlet chamber, 102-Air filter chamber, 103-Air outlet chamber, 104-Lower through hole, 105-Slot, 106-Upper through hole; 2-Positioning bushing, 201-Inner protrusion, 202-Screw hole groove, 203-Insertion hole; 3-Ventilation plate, 301-Movement clearance, 302-Axial hole; 4-Air inlet cover, 401-Air inlet pipe, 402-First inner ring plate; 5-Air outlet cover, 501-Air outlet pipe, 502-Second inner ring plate 6-Driver box; 601-Fixed frame plate; 602-Magnetic suction slot; 603-Internal plug-in; 7-Electromagnetic module; 8-Airflow regulating component; 801-Regulating plate; 802-Connecting rod; 803-Magnetic block; 804-Regulating hole; 804a-Air gap area; 9-Turbidity sensor; 10-Air pump; 11-Three-way valve; 1101-Detection branch; 1102-Exhaust branch; 12-First valve; 13-Second valve; 14-Gas detector. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] Example 1

[0045] This invention designs a precise gas detection and treatment device for high-risk workplaces. The overall structure includes a filter cylinder 1, an air inlet cover 4, an air outlet cover 5, a positioning frame 2, a ventilation plate 3, a drive box 6, an electromagnetic module 7, an airflow regulating component 8, a turbidity sensor 9, an air pump 10, a three-way valve 11, a first valve 12, a second valve 13, and a gas detector 14.

[0046] Combination Figure 1 , Figure 2 , Figure 5 , Figure 10The air inlet cover 4 is fixed to one end of the air filter cylinder 1, and the air outlet cover 5 is fixed to the other end of the air filter cylinder 1. The air outlet cover 5 is connected to the air inlet end of the air pump 10 through a gas pipeline. The drive box 6 is fixedly installed on the top side of the air filter cylinder 1. The air outlet end of the air pump 10 is equipped with a three-way valve 11. The three-way valve 11 is divided into a detection branch 1101 and an exhaust branch 1102. The detection branch 1101 is connected to the gas detector 14 and is equipped with a first valve 12. The exhaust branch 1102 is directly connected to the external environment and is equipped with a second valve 13.

[0047] Combination Figure 2 , Figure 4 The air filter 1 is divided into an air inlet chamber 101 (adjacent to the air inlet cover 4), an air filter chamber 102 (between two adjacent air vents 3, the number of which can be set according to filtration requirements), and an air outlet chamber 103 (adjacent to the air outlet cover 5) by an air inlet chamber 101, an air filter chamber 102, and an air outlet chamber 103, each of which is independently equipped with a turbidity sensor 9 to achieve real-time monitoring of the filtration effect throughout the entire chamber.

[0048] Combination Figure 7 , Figure 8 The air filter 1 is the core filtration chamber of the equipment. It has a hollow cylindrical structure and its bottom plate has multiple downward through holes 104 for fixed connection with the positioning liner 2. The top plate has multiple upward through holes 106 and multiple slots 105. The upward through holes 106 allow the insert 603 inside the drive box 6 to pass through, and the slots 105 allow the adjustment plate 801 of the airflow regulator 8 to move through. The slots 105 are completely covered by the fixing plate 601 of the drive box 6 and can be equipped with a sealing ring to prevent external impurities from entering.

[0049] Combination Figure 3 , Figure 7 , Figure 8 The positioning frame 2 serves as a fixing and cavity separation component for the vent plate 3. A positioning frame 2 is fixed to both sides of each vent plate 3. Its core structure and mating relationship are as follows: The inner circumference of the bottom plate has an inner protrusion 201, with a threaded slot 202 penetrating through the inner protrusion 201, which mates with the lower through hole 104 of the air filter 1, thus fixing the positioning frame 2 to the air filter 1. The top plate has an insertion hole 203, aligned with the upper through hole 106 of the air filter 1, allowing the insert 603 inside the drive box 6 to pass through. The positioning frame 2 at the air inlet cavity 101 abuts against the first inner ring plate 402 of the air inlet cover 4, and the positioning frame 2 at the air outlet cavity 103 abuts against the second inner ring plate 502 of the air outlet cover 5, achieving sealed separation of each cavity and preventing gas cross-flow.

[0050] Combination Figure 2 , Figure 3 , Figure 4 , Figure 8The vent plate 3 is the basic component for gas flow and filtration. All vent plates 3 have identical structural dimensions. Its core design is as follows: a vertically penetrating movable gap 301 is provided for the adjustment plate 801 of the airflow regulator 8 to be inserted and move up and down. Multiple axial holes 302 are provided, which are perpendicularly connected to the movable gap 301, forming the basic gas flow channel. The spacing between adjacent axial holes 302 is uniform to ensure the stability of the fit with the adjustment hole 804 of the adjustment plate 801. The air inlet cover 4 is provided with an air inlet pipe 401 that communicates with the air inlet chamber 101. The air inlet pipe 401 is provided with a first inner ring plate 402 that is inserted into the air inlet chamber 101, which abuts against the positioning bushing 2 to ensure the airtightness of the air inlet chamber 101.

[0051] Combination Figure 2 , Figure 4 The vent cover 5 is provided with a vent pipe 501 that communicates with the vent chamber 103. The vent pipe 501 is connected to the air inlet of the air pump 10 through a hose and serves as the gas outlet. The vent cover 5 is provided with a second inner ring plate 502 that is inserted into the vent chamber 103. The vent chamber 103 is sealed by abutting against the positioning bushing 2.

[0052] Combination Figure 7 , Figure 8 The drive box 6 is the control and sensing mounting component of the equipment, fixed to the top side of the filter cylinder 1. The drive box 6 has multiple magnetic slots 602, with an electromagnetic module 7 fixedly mounted on the top of each slot 602 to provide power for the movement of the airflow regulating component 8. The drive box 6 has multiple internal inserts 603, which sequentially pass through the upper through-hole 106 of the filter cylinder 1 and the corresponding insertion holes 203 of the positioning frame 2. The turbidity sensor 9 is embedded in the bottom surface of the internal insert 603, and the bottom surface of the internal insert 603 is flush with the bottom surface of the top plate of the positioning frame 2 to ensure the monitoring accuracy of the turbidity sensor 9. The drive box 6 has a fixing plate 601 that completely covers the slot 105 of the filter cylinder 1 and can be equipped with a sealing ring to prevent external impurities from entering the interior of the filter cylinder 1 through the slot 105.

[0053] Combination Figure 7 The electromagnetic module 7 is a power adjustment component, fixed to the top of the magnetic slot 602 of the drive box 6. The electromagnetic module 7 and the magnetic block 803 of the airflow regulator 8 are magnetically attracted to each other. The electromagnetic module 7 and the magnetic block 803 switch between repulsive and attractive states by switching on and off the power, which drives the airflow regulator 8 to move up and down, thereby realizing the adjustment of the size of the airflow channel.

[0054] Combination Figure 3 , Figure 7 , Figure 8The airflow regulating component 8 is the core component for adjusting the size of the airflow channel. It consists of an adjusting plate 801, a connecting rod 802, and a magnetic block 803. The adjusting plate 801 has multiple adjusting holes 804. Its structure, size design, and function are as follows: the adjusting plate 801 and the magnetic block 803 are fixedly connected by the connecting rod 802. The magnetic block 803 is movably disposed inside the magnetic suction groove 602 of the drive box 6. The adjusting plate 801 moves through the slot 105 of the filter cylinder 1 and is inserted into the movable gap 301 of the vent plate 3, intersecting with the axial hole 302. The adjusting holes 804 and the axial holes 302 have the same diameter and the same adjacent spacing, ensuring that a regular lens-shaped air gap area 804a can be formed when they intersect.

[0055] Combination Figure 3 , Figure 7 With the horizontal airflow direction as a reference, the distance between the bottommost adjusting hole 804 of the downstream adjusting plate 801 and the bottom surface of the adjusting plate 801 is smaller than that of the upstream side, and the gap between the downstream magnetic block 803 and the electromagnetic module 7 is larger than that of the upstream side. Let H be the distance between the bottommost adjusting hole 804 of the adjusting plate 801 and the bottom surface of the adjusting plate 801. When the bottom surface of the adjusting plate 801 abuts against the top surface of the filter cylinder 1 bottom plate, the distance between the magnetic block 803 and the electromagnetic module 7 directly above it is also H, ensuring the gradient size control accuracy of the air gap region 804a. By moving the adjusting plate 801 up and down, the adjusting hole 804 and the axial hole 302 form a lens-shaped air gap region 804a (detection mode) or completely overlap (cleaning mode), thus achieving size adjustment of the airflow channel.

[0056] Combination Figure 2 , Figure 4 , Figure 7 , Figure 10 The turbidity sensor 9 is a monitoring component, embedded in the bottom surface of the insert 603 inside the drive box 6. One sensor is configured in each of the air inlet chamber 101, air filter chamber 102, and air outlet chamber 103. The turbidity sensor 9 monitors the gas turbidity of the corresponding chamber in real time, providing accurate data support for judging the filtration effect and triggering the cleaning mode. The air pump 10 is the airflow drive component of the equipment, connecting the air outlet cover 5, the air outlet pipe 501, and the three-way valve 11. It can switch between conventional airflow drive and pulsed airflow drive according to the working mode. Its flow rate and pressure parameters can be precisely adjusted to adapt to the stable airflow requirements of the detection mode and the impact airflow requirements of the cleaning mode.

[0057] Combination Figure 10The three-way valve 11, the first valve 12, and the second valve 13 are airflow direction control components. The three-way valve 11 has a detection branch 1101 and an exhaust branch 1102. The first valve 12 controls the on / off state of the detection branch 1101, and the second valve 13 controls the on / off state of the exhaust branch 1102. By switching the on / off states of the corresponding valves, the airflow direction is separated between the equipment detection mode and the cleaning mode, preventing foreign objects from entering the gas detector 14 during cleaning. The gas detector 14 is a gas detection terminal, connected to the detection branch 1101 of the three-way valve 11, receiving the clean gas purified by the equipment and performing detection and analysis. The flow rate of the air pump 10 in the equipment detection mode is perfectly matched to its sampling requirements, ensuring detection accuracy.

[0058] Example 2

[0059] This invention designs a method for precise detection and treatment of gases in high-risk workplaces, which consists of two working modes: a detection mode and a cleaning mode. The cleaning mode can be manually triggered after detection or automatically triggered by monitoring data from the turbidity sensor 9. The two modes are seamlessly switched through the coordinated control of the electromagnetic module 7, the air pump 10, and the valve. The specific steps are as follows:

[0060] I. Detection Mode: Graded Precision Filtration + Gas Detection

[0061] The core principle is that the electromagnetic module 7 generates a repulsive force, causing the adjusting plate 801 to move down and abut against the bottom plate of the filter cylinder 1. The adjusting hole 804 and the axial hole 302 form a lens-shaped air gap region 804a with a downstream dimension smaller than that of the upstream side, which filters the gas through step-by-step particle size filtration. The purified gas is then sent to the gas detector 14 for detection. The specific steps are as follows:

[0062] (a) Open the first valve 12 of the detection branch 1101, close the second valve 13 of the exhaust branch 1102, start the air pump 10 and the gas detector 14, and the equipment enters the gas detection process.

[0063] (ii) When the electromagnetic module 7 is energized, it generates a repulsive force, which causes the magnetic block 803 to move the adjustment plate 801 down and abut against the inner wall of the bottom plate of the filter cylinder 1. At this time, the adjustment hole 804 and the axial hole 302 intersect to form a lens-shaped air gap area 804a, and the size of the downstream air gap area 804a is smaller than that of the upstream side, forming a gradient filtration channel.

[0064] (iii) The gas in the confined space enters the air inlet chamber 101 of the filter cylinder 1 from the air inlet cover 4 and the air inlet pipe 401. Driven by the air pump 10, the gas flows through each filter chamber 102 in sequence and gradually passes through the air gaps 804a of different sizes. The upstream air gap 804a intercepts large foreign objects, and the downstream air gap 804a intercepts small foreign objects. The purified gas after the graded filtration enters the air outlet chamber 103.

[0065] (iv) Turbidity sensors 9 in the air inlet chamber 101, air filter chamber 102 and air outlet chamber 103 monitor the gas turbidity of the corresponding chambers in real time, providing data support for judging the filtration effect.

[0066] (v) The purified gas in the outlet chamber 103 enters the detection branch 1101 of the three-way valve 11 via the air pump 10, and finally flows into the gas detector 14, where the gas detector 14 performs the detection and analysis of gas composition, concentration and other indicators.

[0067] II. Cleaning Mode: Pulsed Airflow + Large-Channel Removal

[0068] The core principle is that the electromagnetic module 7 generates suction, causing the adjusting plate 801 to move upward, so that the adjusting hole 804 completely overlaps with the axial hole 302, increasing the gas flow channel. Simultaneously, the air pump 10 starts a pulsed airflow drive, using the impact force of the high-pressure pulsed airflow to carry away any foreign matter remaining in the filter cartridge 1 along the airflow direction and discharge it through the exhaust branch 1102. The trigger condition is: after the detection is completed, or the turbidity sensor 9 in any chamber monitors a value exceeding the preset reference turbidity. The specific steps are as follows:

[0069] (a) Open the second valve 13 of the exhaust branch 1102 and close the first valve 12 of the detection branch 1101. The air pump 10 is switched to the pulse airflow drive mode.

[0070] (ii) When the electromagnetic module 7 is powered on, it generates an attractive force, which causes the magnetic block 803 to move the adjusting plate 801 upward. The adjusting hole 804 and the axial hole 302 are completely aligned, and the gas flow channel is restored to the maximum aperture, without any interception effect.

[0071] (iii) External airflow enters the filter cylinder 1 through the air inlet cover 4 and the air inlet pipe 401. Under the impact of the pulse airflow, the residual foreign matter attached to the filter cylinder 1 is driven and moves along the airflow direction. It enters the next cavity through the overlapping axial hole 302 and the adjustment hole 804, and finally exits the equipment through the exhaust chamber 103, the air pump 10, the three-way valve 11 and the exhaust branch 1102 in sequence.

[0072] (iv) The turbidity sensor 9 of each cavity continuously monitors the gas turbidity of the corresponding cavity. When the turbidity of all cavities reaches the preset reference turbidity and remains stable within the set time, the air pump 10 stops working, the electromagnetic module 7 is de-energized, the regulating plate 801 is reset, and the cleaning operation inside the filter cylinder 1 is completed.

[0073] Example 3

[0074] Based on the core functions of the device, namely "staged filtration + pulse cleaning", and combined with the gas characteristics of a confined space (such as flow rate and pressure stability requirements), the following airflow parameters can be designed:

[0075] Parameter categories Detection mode Cleanup mode Design basis airflow speed 0.8-1.2 m / s (±5% fluctuation) Pulsed airflow (unsteady flow velocity) During testing, a stable airflow is necessary to ensure filtration accuracy: excessively high flow rates can cause small particles to pass through the filter's air gaps, while excessively low flow rates result in low filtration efficiency. During cleaning, the pulsed airflow needs to create impact force; a stable flow rate is not required. air pump flow 2-3L / min 6-8L / min The detection mode is matched to the sampling requirements of the gas detector (the optimal sampling flow rate for conventional gas detectors is 1-5 L / min). The cleaning mode requires a high flow rate to enhance the airflow's ability to carry foreign objects. airflow pressure 0.15-0.2MPa Pulse pressure 0.3-0.4 MPa (peak value) During testing, low pressure is used to prevent foreign objects from being stirred up again due to airflow disturbance; during cleaning, high-pressure pulses enhance the removal effect on residual foreign objects on the inner wall of the filter chamber. Pulse parameters - The frequency is 2Hz (i.e., 2 pulses per second), and each pulse lasts for 0.3s. By using multiple short pulses to create an "impact-return" cycle, structural damage to the vent plate and regulating plate caused by continuous high pressure is avoided, while improving the efficiency of foreign object removal.

[0076] Example 4

[0077] I. For common turbidity scenarios in confined spaces (such as industrial workshops, underground pipelines, and warehouses), and based on the monitoring requirements of turbidity sensor 9, the following turbidity environmental parameters are designed:

[0078] (a) Initial turbidity classification (gas input in a confined space)

[0079] (1) High turbidity environment: 150-300 NTU (such as industrial workshops with a lot of dust, or limited spaces where construction waste is piled up).

[0080] (2) Medium turbidity environment: 50-150 NTU (such as ordinary warehouses, underground pipelines that are not completely sealed).

[0081] (3) Low turbidity environment: 10-50 NTU (such as equipment cavities and sealed pipes with high cleanliness).

[0082] (II) Turbidity Monitoring Standards

[0083] (1) Turbidity sensor accuracy: ≤ ±2 NTU (ensuring sensitivity to minute changes in turbidity).

[0084] (2) Preset reference turbidity (cleaning completion threshold): ≤5NTU (to meet the gas detector’s requirements for “clean gas” detection and avoid residual particulate matter interfering with detection accuracy).

[0085] (3) Monitoring frequency: Real-time monitoring (turbidity data is output every 0.5s).

[0086] II. Based on the core design principle that "the downstream air gap region size is smaller than the upstream side", and combined with the requirements for graded filtration of foreign particles, the parameters of the 804a (lens-shaped) air gap region are designed as follows:

[0087] (a) Basic hole parameters

[0088] (1) The diameter of the axial hole 302 and the adjustment hole 804 is 5mm (to ensure that a regular lens-shaped air gap area can be formed when the two intersect).

[0089] (2) Spacing between adjacent axial holes 302 / adjustment holes 804: 10mm (to ensure that the intersection position of adjustment hole 804 and axial hole 302 is stable when the adjustment plate moves).

[0090] (II) Dimensions of each air gap zone (taking a 3-stage filtration chamber as an example)

[0091] Air filtration chamber level Upstream side (Level 1) Midstream side (second level) Downstream side (third level) Long axis of the air gap region (horizontal direction, mm) 4.0±0.2 3.0±0.2 2.0±0.2 Air gap region short axis (vertical direction, mm) 2.0±0.1 1.5±0.1 1.0±0.1 Adaptable to filter foreign particle size >4.0mm >3.0mm >2.0mm

[0092] III. Specific reference flow for the operation of the device of the present invention (taking a three-stage air filtration chamber as an example):

[0093] (I) Implementation steps of the detection mode

[0094] (1) Pretreatment: Confirm that the air pump 10, gas detector 14 and turbidity sensor 9 are calibrated; the electromagnetic module 7 is powered on to generate repulsive force, and the adjustment plate 801 abuts against the bottom plate of the filter cylinder 1 to form the above-mentioned three-stage air gap zone 804a (long axis 4.0mm→3.0mm→2.0mm).

[0095] (2) Airflow input: The gas in the confined space enters the air intake chamber 101 through the air intake cover 4 (the diameter of the air intake pipe 401 is 10mm). The initial airflow velocity is 1.0m / s and the pressure is 0.18MPa.

[0096] (3) Staged filtration: First stage air filtration chamber 102: intercepts foreign objects ≥4.0mm (such as fiber clumps, large dust particles), and the turbidity sensor 9 monitors in real time (when the initial turbidity is 150 NTU, it drops to 80-100 NTU after the first stage). Second stage air filtration chamber 102: intercepts foreign objects ≥3.0mm (such as medium dust particles), and the turbidity drops to 30-50 NTU. Third stage air filtration chamber 102: intercepts foreign objects ≥2.0mm (such as small dust particles), and the turbidity drops to ≤5 NTU.

[0097] (4) Detection output: Clean gas enters the detection branch 1101 of the three-way valve 11 (first valve 12 is open) via the gas pump 10 (flow rate 2.5L / min), and finally enters the gas detector 14 to complete the detection.

[0098] (II) Implementation Steps of the Cleanup Mode

[0099] (1) Triggering conditions: After the detection mode ends, or the turbidity sensor 9 of any filter chamber 102 monitors a value > 5 NTU (filtration failure occurs during detection).

[0100] (2) Pre-treatment: Close the first valve 12 and open the second valve 13; switch the electromagnetic module 7 to the suction mode, the magnetic block 803 is attracted to the surface of the electromagnetic module 7, and the adjustment hole 804 is completely overlapped with the axial hole 302 (hole diameter 5mm, no interception effect).

[0101] (3) Pulse cleaning: The air pump 10 starts the pulse mode (frequency 2Hz, single pulse 0.3s, flow rate 7L / min, peak pressure 0.35MPa). The external airflow enters through the air inlet cover 4, and the pulse airflow carries the foreign matter (such as attached dust) remaining in the air filter chamber 102 through the overlapping axial hole 302 / adjustment hole 804 in sequence, and is discharged through the air outlet chamber 103, the air pump 10, and the exhaust branch 1102.

[0102] (4) Termination judgment: When the turbidity sensor 9 of all air filter chambers 102 monitors a value ≤ 5 NTU, start the timing module (timer for 30 seconds). If the turbidity remains ≤ 5 NTU within 30 seconds, the air pump 10 stops, the electromagnetic module 7 is de-energized, and the cleaning is completed.

[0103] Example 5

[0104] The specific applicable scenarios and parameter adjustments for the device of the present invention are as follows:

[0105] Finite space type Airflow velocity (detection mode) First-stage long axis of the air gap region Cleaning pulse frequency Industrial workshop (high dust) 0.8 m / s (reducing flow rate to enhance filtration) 4.5mm (increases interception range) 3Hz (High-frequency enhanced cleaning) Underground pipes (medium humidity) 1.0m / s 4.0mm 2Hz Equipment cavity (low turbidity) 1.2 m / s (improving efficiency) 3.5mm (reducing the air gap area to accelerate airflow) 1Hz

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-risk workplace gas precision detection and processing device, comprising a filter cylinder (1), an inlet cover (4) fixed to one end of the filter cylinder (1), and an outlet cover (5) fixed to the other end of the filter cylinder (1), wherein the outlet cover (5) is connected to an air pump (10) via a gas pipeline, characterized in that: Multiple venting plates (3) are positioned and installed inside the air filter cylinder (1). A positioning liner (2) is fixedly installed on both sides of each venting plate (3). The venting plate (3) has a vertically penetrating movable gap (301). The venting plate (3) has multiple axial holes (302) that are perpendicularly connected to the movable gap (301). The air filter cylinder (1) forms an air inlet chamber (101) adjacent to the air inlet cover (4), an air filter chamber (102) between two adjacent venting plates (3), and an air outlet chamber (103) adjacent to the air outlet cover (5). A drive box (6) is fixedly installed on the top side of the air filter (1). The drive box (6) has multiple magnetic slots (602). An electromagnetic module (7) is fixedly configured on the top of the magnetic slots (602). Multiple airflow regulating components (8) are movably inserted into the air filter (1). The airflow regulating component (8) includes an adjusting plate (801) that is inserted into the movable gap (301) and a magnetic block (803) that is magnetically attracted to the electromagnetic module (7). The adjusting plate (801) has an adjusting hole (804) that crosses with the axial hole (302). The regulating hole (804) and the axial hole (302) have the same diameter. The regulating hole (804) and the axial hole (302) intersect to form a lens-shaped air gap region (804a). Based on the horizontal flow direction of the airflow, the size of the downstream air gap region (804a) is smaller than that of the upstream air gap region (804a). The air filter cylinder (1) is equipped with a turbidity sensor (9) in its air inlet chamber (101), air filter chamber (102), and air outlet chamber (103). The air pump (10) is equipped with a three-way valve (11) at its outlet. The three-way valve (11) is equipped with a detection branch (1101) and an exhaust branch (1102). The detection branch (1101) is connected to the gas detector (14) and is equipped with a first valve (12). The exhaust branch (1102) is directly connected to the external environment and is equipped with a second valve (13).

2. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: The air inlet cover (4) is provided with an air inlet pipe (401) communicating with the air inlet chamber (101), and the air outlet cover (5) is provided with an air outlet pipe (501) communicating with the air outlet chamber (103). The air outlet pipe (501) is connected to the air inlet end of the air pump (10) through a hose. The air intake cover (4) is provided with a first inner ring plate (402) that is inserted into the air intake cavity (101), and the first inner ring plate (402) abuts against the positioning liner (2) at the position of the air intake cavity (101); The vent cover (5) is provided with a second inner ring plate (502) that is inserted into the vent cavity (103), and the second inner ring plate (502) abuts against the positioning liner (2) at the position of the vent cavity (103).

3. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: The bottom plate of the air filter (1) has multiple downward through holes (104), and the bottom plate of the positioning frame (2) has an inner protrusion (201) on its inner circumference. A screw hole groove (202) that matches the downward through holes (104) is provided through the inner protrusion (201).

4. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: The top of the air filter (1) has multiple through holes (106), and the top plate of the positioning frame (2) has an insertion hole (203) aligned with the through holes (106). The drive box (6) is provided with multiple inner plugs (603) at the positions of the upper through hole (106) and the insertion hole (203), and the turbidity sensor (9) is embedded in the bottom surface of the inner plug (603).

5. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: The adjusting plate (801) and the magnetic block (803) are fixedly connected by a connecting rod (802), and the magnetic block (803) is movably arranged inside the magnetic suction groove (602).

6. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: The top plate of the air filter (1) is provided with multiple slots (105), and the adjusting plate (801) moves through the slots (105) and is inserted into the air filter (1); The drive box (6) is provided with a mounting plate (601) that fully covers the slot (105).

7. The high-risk workplace gas precision detection and processing equipment according to claim 1, characterized in that: Each vent plate (3) has the same structural dimensions, the vent plate (3) has the same spacing between multiple axial holes (302), the adjustment plate (801) has the same spacing between multiple adjustment holes (804), and the spacing between adjacent axial holes (302) is the same as the spacing between adjacent adjustment holes (804). Based on the horizontal flow direction of the airflow: the distance between the bottom adjustment hole (804) of the downstream adjustment plate (801) and the bottom surface of the adjustment plate (801) is less than the distance between the bottom adjustment hole (804) of the upstream adjustment plate (801) and the bottom surface of the adjustment plate (801), and the gap between the downstream magnetic block (803) and the electromagnetic module (7) is greater than the gap between the upstream magnetic block (803) and the electromagnetic module (7).

8. The high-risk workplace gas precision detection and processing equipment according to claim 7, characterized in that: Let H be the distance between the bottom adjustment hole (804) of any adjustment plate (801) and the bottom surface of the adjustment plate (801). When the bottom surface of the adjustment plate (801) abuts against the top surface of the bottom plate of the air filter (1), the distance between the magnetic block (803) connected to the adjustment plate (801) and the electromagnetic module (7) directly above it is also H.

9. A method for precise detection and treatment of gases in high-risk workplaces, characterized in that, A high-risk workplace gas precision detection and processing device applied to any one of claims 1 to 8, comprising the following: I. Detection Mode: (a) Open the first valve (12) of the three-way valve (11) detection branch (1101), close the second valve (13) of the exhaust branch (1102), start the air pump (10) and the gas detector (14) to put the device into the gas detection process; (ii) When the electromagnetic module (7) is energized, it generates a repulsive force, which causes the magnetic block (803) to move the adjustment plate (801) down and abut against the inner wall of the bottom plate of the air filter (1). At this time, the adjustment hole (804) of the adjustment plate (801) and the axial hole (302) of the ventilation plate (3) intersect to form a lens-shaped air gap area (804a), and the size of the downstream air gap area (804a) is smaller than the size of the upstream air gap area (804a). (iii) The gas in the confined space enters the air inlet chamber (101) of the filter cylinder (1) from the air inlet cover (4), and flows through each filter chamber (102) in sequence under the drive of the air pump (10), and gradually passes through the air gap area (804a) of different sizes. When the gas flows through the upstream air gap region (804a), large foreign objects are intercepted and filtered. When it flows through the downstream air gap region (804a), small foreign objects are further intercepted and filtered. The purified gas enters the outlet chamber (103). (iv) Turbidity sensors (9) in the air inlet chamber (101), air filter chamber (102), and air outlet chamber (103) monitor the gas turbidity of the corresponding chambers in real time, providing data support for judging the filtration effect; (v) The purified gas enters the detection branch (1101) of the three-way valve (11) via the gas pump (10), and finally flows into the gas detector (14), where the gas detector (14) detects and analyzes the gas, etc. II. Cleanup Mode: (a) After the test is completed, or when the value monitored by any cavity turbidity sensor (9) exceeds the preset reference turbidity, open the second valve (13) of the exhaust branch (1102), close the first valve (12) of the detection branch (1101), and start the pulse airflow drive of the air pump (10); (ii) When the electromagnetic module (7) is powered on, it generates an attractive force, which causes the magnetic block (803) to move the adjustment plate (801) upward. The adjustment hole (804) and the axial hole (302) are completely aligned, increasing the gas flow channel. (iii) When the external airflow enters the filter cylinder (1), under the action of the pulse airflow, the foreign matter remaining in the filter cylinder (1) is driven and moves along the airflow direction, enters the next cavity through the overlapping axial hole (302) and adjustment hole (804), and is finally discharged from the exhaust branch (1102). (iv) Each turbidity sensor (9) continuously monitors the gas turbidity of the corresponding cavity. When the turbidity of all cavities is less than the preset reference turbidity and remains stable within the set time, the air pump (10) stops working, the electromagnetic module (7) is de-energized, and the cleaning operation is completed.

Images