A harmful gas monitoring alarm

Abstract

This invention relates to the field of gas detection alarms, specifically a hazardous gas monitoring alarm. The alarm body internally houses a power supply module, a detection module, a communication module, and a gas pump. It also includes a gas sampling module and a control module. The gas sampling module is installed on the lower side of the alarm body away from the power supply module. A gas guide pipe is installed on the gas sampling module. The gas guide pipe has a double-layer structure, consisting of an inner pipe and an outer pipe. A ventilation opening is provided at the lower end of the gas guide pipe, and the ventilation opening has a stepped, concave-convex shape to alter the flow trajectory of the hazardous gas. After the detection module detects the hazardous gas components, the control module enables unidirectional gas flow within the gas sampling module. This invention solves the problem of gas sample residue during the gas collection process causing the gas sample purity to be unrepresentative, thereby improving the accuracy of the detection alarm.

Description

Technical Field

[0001] This invention relates to the field of gas detection alarms, specifically a hazardous gas detection alarm. Background Technology

[0002] NH3, H2S, CO2, CO, etc. are common harmful gases in the air. When the concentration is low, they can cause irreversible damage to the respiratory system. Moreover, when the concentration is low, harmful gases are not easily detected by the human body. Long-term inhalation of harmful gases can lead to coma and even death. Therefore, it is necessary to detect harmful gases in the environment. Harmful gas detection alarms collect and analyze gas through active sampling, and then upload the data to an information platform for recording.

[0003] Currently, most heavy metal workshops use hazardous gas detectors to detect the concentration of hazardous gases in the workshop. These detectors are placed in areas frequently visited by workshop staff, and the air is sampled and analyzed periodically to ensure timely information on the concentration of hazardous gases and to take necessary safety measures. However, because hazardous gas detectors cannot switch internal gas samples in real time, they cannot accurately detect the concentration of hazardous gases.

[0004] Because the hazardous gas detector is used for air monitoring in a heavy metal workshop for extended periods, it needs to expel any residual gas from the previous test. If the detector cannot replace the gas sample in the area in a timely manner, it will be unable to accurately detect whether the concentration of hazardous gases exceeds the safety limit. This may also result in false alarms or delayed alarms, leading to inaccurate data.

[0005] To address this, existing technologies offer several solutions. Before a hazardous gas detector starts operating, an air pump is used to ventilate and exhaust the inside of the detector, quickly removing residual gas from the previous test and reducing its concentration to ensure the accuracy of the next test and provide more accurate readings. However, this method cannot detect hazardous gases in heavy metal workshops while removing residual gas, thus hindering real-time monitoring.

[0006] In view of this, in order to overcome the above-mentioned technical problems, the present invention designs a harmful gas detection alarm, which solves the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a hazardous gas detection alarm device. This device ensures the purity of the samples in the detection area of ​​the detector by intermittently switching the detection samples inside the detector, thereby improving the detection accuracy of the detector.

[0008] To achieve the above objectives, the present invention proposes the following technical solution:

[0009] This invention provides a hazardous gas monitoring and alarm device, comprising an alarm body. The alarm body internally houses a power supply module, a detection module, a communication module, an air pump, a gas sampling module, and a control module. The gas sampling module is installed on the lower side of the alarm body away from the power supply module. A gas guide pipe is installed on the gas sampling module. The gas guide pipe has a double-layer structure, consisting of an inner pipe and an outer pipe. A ventilation opening is provided at the lower end of the gas guide pipe, and the ventilation opening has a stepped, concave-convex shape to alter the flow trajectory of the hazardous gas. After the detection module detects the hazardous gas components, the control module enables unidirectional gas flow within the gas sampling module, simultaneously expelling the hazardous gas components.

[0010] When the alarm starts working, the installed power supply module supplies power to the alarm, enabling the control module to control the gas sampling module to collect harmful gases. The collected gas is then detected by the detection module to check the concentration. If the concentration exceeds the normal range, an alarm is triggered. Data from each detection is uploaded to the data platform via the communication module. A stepped ventilation system is used to alter the trajectory of the harmful gases, dispersing their flow and reducing pressure loss, thus ensuring the speed at which harmful gases enter. A double-layered gas guide pipe ensures the separation of clean and harmful gases, preventing gas mixing that could lead to inaccurate detection results and false alarms. The control module ensures unidirectional gas flow within the gas sampling module, preventing the detected harmful gases from mixing with the gases to be detected, thus avoiding inaccurate results and improving the accuracy of the detection.

[0011] Preferably, the gas sampling module includes spiral blades, a gas collecting chamber, a baffle plate, a one-way valve, a magnetic component, a return spring, a misalignment hole, a movable block, and a folding plate. A spiral blade is installed on the left side of the vent, forming a spiral channel by fitting the inner tube's circumference. To ensure the accuracy of the alarm detection, the spiral blades within the double-layer structure of the air guide pipe create a spiral channel between the inner and outer tubes, altering the flow trajectory of the measured gas and ensuring uniform gas distribution. A gas collecting chamber is arranged in a circular row above the spiral channel, with an outlet and inlet at both ends. A folding plate is installed in the middle of the gas collecting chamber near the inner tube. When the control module controls the gas sampling module to discharge the measured gas, the compression of the folding plate completely discharges the measured gas from the gas collecting chamber. Simultaneously, the folding plate ensures the gas collecting chamber's seal during detection, preventing mixing of the detection gas and the measured gas, thus avoiding inaccurate detection results. A baffle plate is installed inside the gas collecting chamber, thereby achieving the mixing of clean gas and... The isolation of the gas to be tested ensures that the gas collecting chamber is not affected by the gas to be tested, thereby avoiding inaccurate results in subsequent tests. A slope is provided on one side of the baffle plate, and a magnetic component is installed at the point where the baffle plate meets the front end of the gas collecting chamber. When the magnetic components attract each other, the baffle plate and the control module move synchronously. A flow channel is provided inside the baffle plate, and a one-way valve is installed inside the flow channel to achieve unidirectional flow of the gas to be tested and clean gas, preventing backflow. A movable block is installed on the left side of the baffle plate, and the movable block has the same slope as the baffle plate. When the control module enables unidirectional gas flow in the gas collecting module, the slope of the movable block and the slope of the baffle plate are in contact. When the internal measured gas is discharged, the movable block and the baffle plate, which are in contact, can empty the internal gas, preventing residual gas from causing deviations in subsequent test results, thereby improving the accuracy of the alarm. Furthermore, the misaligned hole on the movable block is coaxial with the gas outlet, allowing the gas outlet to fully open and completely empty the internal measured gas.

[0012] Preferably, the control module includes a rotating shaft, a pusher block, an air bladder, a gas one-way valve, a moving ring, and a rotating plate. The rotating shaft is coaxially mounted with the inner tube, thus achieving synchronous movement between the rotating shaft and the inner tube. A moving ring is installed on the outer circumferential surface of the inner tube, allowing the control module to move up and down to seal the inner and outer tubes during operation, preventing external air from interfering with the internal gas to be tested during detection and thus improving the purity of the internal gas. The rotating shaft is hollow, used to hold clean gas. A pusher block and a rotating plate are installed on the circumferential surface of the rotating shaft, which is on the same plane as the gas collecting chamber, allowing the pusher block to collect gas from the gas collecting chamber when the rotating shaft rotates. The rotating plate vents air from the inside of the air collecting chamber, improving the stability of the movement. The push block and the rotating plate are arranged in a cross-shaped symmetrical pattern, so that when cleaning two opposite air collecting chambers, air can be collected from the other two air collecting chambers. The rotating plate has a through hole that communicates with the rotating shaft, so that the through hole on the rotating plate is filled with clean gas when the rotating shaft rotates. The airbag is installed at the air inlet of the air collecting chamber, and the air outlet of the airbag is close to the air inlet of the air collecting chamber. The end of the airbag facing the spiral channel has an air inlet, and the air inlet is equipped with a one-way gas valve, so as to prevent the gas inside the airbag from spreading around during the compression process, and thus allow the gas to flow through the predetermined outlet.

[0013] Preferably, the push block has multiple grooves arranged in a circumferential array, the width of which is the same as the width of the airbag. Thus, the grooves can drive the push block to squeeze the airbag and achieve air intake when the rotating shaft rotates. With multiple grooves and the width of the grooves being the same as the width of the airbag, the rotating shaft drives the push block to achieve multiple squeezing and air intake in one process, thereby avoiding the phenomenon that the amount of gas to be tested absorbed by squeezing the airbag in one process is too small, which would lead to inaccurate test results.

[0014] Preferably, the spiral channel is an inverted cone shape that gradually increases in size from bottom to top. The inverted cone shape of the spiral channel allows the gas flow velocity of the gas to be tested to gradually increase during the movement, thereby quickly filling the gas collection chamber during the collection process, improving the collection efficiency. At the same time, it can also make the gas distribution uniform and reduce the error of the collected gas sample. The edge thickness of the spiral blade is smaller than the thickness of the center of the spiral blade. The spiral blade with a smaller edge thickness can allow the gas to flow smoothly, increase the gas flow velocity, and thus improve the gas collection efficiency of the alarm.

[0015] Preferably, the spiral blades are provided with conical protrusions located at the middle of the spiral blades. The conical protrusions enhance the flow of gas between the spiral blades, increase the agitation of gas between the spiral blades, and thus enhance the mixing effect of the gas, making the collected gas samples uniformly mixed. At the same time, when the gas flows in the spiral channel, the gas impacts the conical protrusions in the middle of the spiral blades, which can adhere the fine impurities in the gas to the conical protrusions and the inner wall of the spiral channel, avoiding interference from impurities in the gas with the detection results. In addition, the conical protrusions can improve the uniform distribution of gas, ensuring that the collected gas samples are representative and avoiding large differences between gas samples, which could lead to deviations in the detection results and false alarms.

[0016] Preferably, a groove is formed on the circumferential surface of the rotating shaft near the moving ring, and a column is installed on the inner circumferential surface of the inner tube at the moving ring. The column fits into the groove. Through the cooperation of the column and the groove, the column moves in the groove during the rotation of the rotating shaft, thereby changing the position of the moving ring. When the moving ring moves upward and fits into the groove on the inner wall of the outer tube, the internal space is sealed, ensuring that the gas to be tested inside the gas guide tube is not affected by the external environment. During the up and down movement of the moving ring, impurities at the vent can be cleaned, ensuring that subsequent gas will not bring impurities into the gas collection chamber, thereby avoiding impurities from interfering with the test results.

[0017] Preferably, the diameter of the through hole on the rotating plate is larger than the diameter of the flow channel. During the rotation of the rotating shaft, the through hole on the rotating plate is in contact with the inlet of the flow channel on the baffle plate. When the clean gas flows from the through hole on the rotating plate into the flow channel inside the baffle plate, the flow velocity of the clean gas increases because the diameter of the through hole is larger than the diameter of the flow channel, thereby improving the efficiency of the clean gas entering the gas collecting chamber. In the same time period, the clean gas can quickly fill the entire gas collecting chamber, and the excess gas can repeatedly flush the inside of the gas collecting chamber to avoid the presence of residual gas in the gas collecting chamber.

[0018] Preferably, the rotating plate is arc-shaped, and the orientation of the arc-shaped part of the rotating plate is opposite to the rotation direction of the rotating shaft. The arc-shaped rotating plate changes the flow direction of the gas during rotation. During the rotation of the rotating shaft, the gas between the inner tube and the outer tube moves in one direction, thereby discharging the internal air to the outside, thus ensuring that the gas sample detected each time is not an outside air sample from the same time period.

[0019] Preferably, the thickness of the folded plate in the contracted state is half the thickness of the baffle plate near the rotating shaft. One end of the folded plate is connected to the left side of the baffle plate inlet, and the other end is connected to the gas collection chamber. Thus, when the baffle plate resets, it drives the folded plate to reset, achieving a seal inside the gas collection chamber. When the measured gas sample is discharged from the gas collection chamber, the baffle plate moves towards the baffle plate outlet through the rotation of the rotating plate. At this time, the folded plate is compressed, changing the internal space of the gas collection chamber. In the fully compressed state, the thickness of the folded plate is half the thickness of the baffle plate, thereby ensuring that the measured gas inside is completely discharged to avoid residues that may cause errors in the detection data.

[0020] The beneficial effects of this invention are:

[0021] 1. The present invention provides a hazardous gas detection alarm device. This device detects the area where the alarm device is located in real time by intermittently switching the detection samples inside the alarm device, while ensuring the purity of the samples in the detection area inside the alarm device, thereby improving the detection accuracy of the alarm device.

[0022] 2. The present invention provides a hazardous gas detection alarm. The device seals the collected gas to be detected through a control module to prevent the gas to be detected from interfering with the external environment. At the same time, it can switch the internal gas to be detected, thereby ensuring the purity of the gas to be detected and ensuring that the gas detected each time is a gas from a different time period.

[0023] 3. The present invention provides a hazardous gas detection alarm device. This device, through the cooperation of the control module and the gas sampling module, realizes one-way conduction of the gas that has already been detected while detecting the gas, so as to avoid the residual gas of the detected gas from affecting the subsequent detection data. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a partially enlarged view of the overall structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the overall structure of the gas extraction module of the present invention;

[0027] Figure 3 This is a magnified view of part A of the present invention;

[0028] Figure 4This is an overall structural diagram of the control module of the present invention;

[0029] Figure 5 This is a cross-sectional view of the control module and the gas extraction module of the present invention;

[0030] Figure 6 This is a partial enlarged view of point B in the present invention;

[0031] Figure 7 This is a cross-sectional view of the spiral channel of the present invention;

[0032] Figure 8 This is a flowchart of the workflow of the present invention.

[0033] In the diagram: 1. Alarm unit body; 11. Baffle; 2. Power supply module; 3. Detection module; 4. Communication module; 5. Air pump; 6. Gas sampling module; 61. Air guide pipe; 611. Inner pipe; 612. Outer pipe; 613. Ventilation port; 62. Spiral blade; 621. Spiral channel; 6211. Inverted cone shape; 622. Conical protrusion; 63. Gas collection chamber; 64. Baffle plate; 641. Flow channel; 65. One-way valve; 66. Magnetic component; 67. Return spring; 68. Movable block; 681. Misalignment hole; 69. Folding plate; 7. Control module; 71. Rotating shaft; 711. Inclined groove; 712. Column; 713. Hollow shape; 72. Push block; 721. Groove; 73. Rotating plate; 731. Through hole; 732. Arc shape; 74. Moving ring; 75. Airbag; 76. Gas one-way valve; Detailed Implementation

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figure 1 As shown, the present invention provides a hazardous gas monitoring and alarm device. The alarm device body 1 has a gas sampling module 6 installed on the lower side away from the power supply module 2. The gas sampling module 6 has a gas guide pipe 61 installed on it. The gas guide pipe 61 has a double-layer structure, consisting of an inner pipe 611 and an outer pipe 612. A ventilation port 613 is opened at the lower end of the gas guide pipe 61. The ventilation port 613 has a stepped shape, which changes the flow trajectory of the hazardous gas. After the detection module 3 detects the hazardous gas components, the control module 7 enables the gas in the gas sampling module 6 to flow unidirectionally, while simultaneously expelling the hazardous gas components.

[0036] Staff place this application in the area where hazardous gas detection is required. When the alarm is activated, power is supplied to the alarm via the installed power module 2, enabling the control module 7 to control the gas collection module 6 to collect hazardous gases. The collected gas is then analyzed by the detection module 3 to determine its concentration. If the concentration exceeds the normal range, an alarm is triggered. Data from each test is uploaded to the data platform via the communication module 4. The gas pump 5 collects the gas to be detected from the outside environment into the gas guide tube 61. The double-layered gas guide tube 61 ensures the separation of clean and hazardous gases, preventing gas mixing that could lead to deviations in the detection results and false alarms. The gas to be detected passes through the stepped ventilation opening 613. Initially, the stepped opening between the moving ring 74 and the outer tube 612 is closed, thus achieving a seal inside the alarm and preventing interference from the external gas. The column 712 on the inner circumference of the inner tube 611 engages with the inclined groove 711 on the rotating shaft 71. At this time, the moving ring 74 moves upward, narrowing the distance between the moving ring 74 and the outer tube 612, increasing the flow velocity of the gas to be detected, and thus quickly filling the gas collection chamber 63. As the rotating shaft 71 continues to rotate, the column 712 moves within the inclined groove 711, and the moving ring 74 moves upward. The rotating ring and the... The distance between the outer tubes 612 gradually widens, slowing down the flow rate of the gas to be tested. This prevents the gas entering the gas collection chamber 63 from mixing with the external gas before it is detected, ensuring the representativeness of the test sample. During the inhalation process of the airbag 75, the inner tube 611 moves upward via the rotating shaft 71. At this time, the moving ring 74 seals the gas guide tube 61. After the test is completed, the rotating shaft 71 moves downward via the inner tube 611, releasing the seal of the moving ring 74, allowing subsequent gas to enter for real-time detection. As the moving ring 74 moves downward, it cleans the impurities accumulated between the moving ring 74 and the uneven structure of the outer tube 612, preventing... Impurities entering the gas sample can affect the test results. The rotating ring alters the flow path of the gas being tested, making it more uniform and ensuring the representativeness of the sample. Control module 7 ensures unidirectional flow of the gas already tested within the gas sampling module 6, preventing mixing with the gas being tested and avoiding deviations in the test results, thus improving accuracy. A baffle 11 on the alarm unit 1, located near the gas sampling module 6, isolates the external gas from the internal gas after intake and exhaust, preventing interference from external gases and ensuring accurate test data.

[0037] like Figure 2 , 3As shown in Figure 7, a spiral blade 62 is installed on the left side of the vent 613. The spiral blade 62 fits against the circumferential surface of the inner tube 611 to form a spiral channel 621. An air collection chamber 63 is installed in a row above the spiral channel 621. Air collection chambers 63 have air outlets and air inlets at both ends. A folding plate 69 is installed in the middle of the side of the air collection chamber 63 near the inner tube 611. A baffle plate 64 is installed inside the air collection chamber 63. A slope is opened on one side of the baffle plate 64. The baffle plate 64 and the air collection chamber 69 are connected. A magnetic component 66 is installed at the front end of chamber 63. A flow channel 641 is opened inside the baffle plate 64. A one-way valve 65 is installed inside the flow channel 641. A movable block 68 is installed on the left side of the baffle plate 64. The movable block 68 has the same inclined surface as the baffle plate 64. When the gas in the gas sampling module 6 is unidirectionally oriented, the inclined surface of the movable block 68 is in contact with the inclined surface of the baffle plate 64, and the misaligned hole 681 opened on the movable block 68 is coaxial with the gas outlet.

[0038] When the gas to be tested enters the gas collection module through the gas pump 5, it passes through the spiral channel 621 installed on the inner tube 611. At this time, the gas to be tested changes its trajectory through the interaction between the spiral blades 62, making the gas to be tested more uniformly mixed. Four gas collection chambers 63 are installed in a circular array above the spiral channel 621. The left and right sides of the gas collection chambers 63 are respectively provided with air inlets and air outlets. After the gas to be tested enters the gas collection module through the spiral channel 621, the control module 7 directs the gas to enter the gas collection chamber 63 through the air inlet on the right side of the gas collection chamber 63. The gas collection chamber 63 is slidably installed inside. A baffle plate 64 has a flow channel 641, and a one-way valve 65 is installed in the flow channel 641. Gas enters the left side of the baffle plate 64 through the one-way valve 65 for harmful gas detection. After the detection is completed, the control module 7 attracts the magnetic component 66, which drives the baffle plate 64 to move and discharge the measured gas. When the baffle plate 64 moves towards the gas outlet, the measured gas is compressed. During the movement, the gas to be tested will be squeezed by the high pressure of the movable block 68, which will open the misalignment hole 681 opened on the movable block 68. The misalignment hole 681 cooperates with the gas outlet to ensure that the gas pressure inside the gas collection chamber 63 remains balanced.

[0039] When the baffle plate 64 contacts the movable block 68, the baffle plate 64 cooperates with the inclined surface on the movable block 68 to push the movable block 68 to move. At this time, the misalignment hole 681 and the air outlet are fully opened to discharge the internal gas. After discharge, the control module 7 no longer attracts the baffle plate 64. At this time, the baffle plate 64 is reset by the installed spring. At the same time, the folding plate 69 is reset, thus ensuring the sealing of the gas collection chamber 63 in the next test. The thickness of the folding plate 69 in the contracted state is half the thickness of the baffle plate 64 near the rotating shaft 71. One end of the folding plate 69 is connected to the left side of the inlet of the flow channel 641 of the baffle plate 64, and the other end is connected to the gas collection chamber 63. Thus, when the baffle plate 64 moves to the leftmost air outlet, it can ensure that the baffle plate 64 can completely discharge the measured gas in the gas collection chamber 63, ensuring that there is no gas residue in the gas collection chamber 63. This avoids the gas residue causing insufficient purity of the gas to be detected in subsequent tests, thereby reducing the accuracy of the alarm detection results.

[0040] like Figure 6 As shown, the spiral channel 621 is an inverted cone 6211 that gradually increases in size from bottom to top. This inverted cone shape allows the gas flow velocity to gradually increase during movement, enabling it to quickly fill the gas collection chamber 63 during collection, thus improving collection efficiency. It also ensures uniform gas distribution, reducing errors in the collected gas sample. The edge thickness of the spiral blade 62 is less than the center thickness, allowing for smooth gas flow and increasing the gas flow velocity, thereby improving the efficiency of the alarm's gas collection. The spiral blade 62 has conical protrusions 622. When external gas is collected into the gas guide tube 61 by the air pump 5, it rises through the spiral channel 621 into the gas collection chamber 63. The gas being measured flows along the thinner edge of the spiral channel 621... As the gas rises sideways and upwards, it impacts the four walls of the spiral channel 621, causing fine impurities to adhere to these walls. Because the spiral channel 621 is an inverted cone shape, the gas flow velocity gradually increases, thus accelerating the gas collection rate. During flow, the conical protrusion 622 located at the middle of the spiral blades 62 enhances the gas flow between the blades, increasing gas agitation and mixing. This results in a more uniformly mixed gas sample. Simultaneously, the conical protrusion 622 improves gas uniformity within the spiral channel 621, ensuring the representativeness of the collected gas sample and preventing significant differences between samples that could lead to false alarms due to data deviations.

[0041] like Figure 4-5As shown, the rotating shaft 71 is coaxially mounted with the inner tube 611, thus enabling synchronous movement of the rotating shaft 71 and the inner tube 611. A movable ring 74 is installed on the outer circumferential surface of the inner tube 611, allowing it to move up and down to seal the inner tube 611 and outer tube 612 during the movement of the control module 7. This prevents external air from interfering with the internal gas being tested during the detection process, thereby improving the purity of the internal gas being tested. The rotating shaft 71 is hollow (713), and the hollow rotating shaft 71 is used to hold clean gas. A push block 72 and a rotating plate 73 are installed on the circumferential surface of the rotating shaft 71 and the gas collecting chamber 63, respectively. This allows the push block 72 to collect gas from the gas collecting chamber 63 when the rotating shaft 71 rotates, and the rotating plate 73 to rotate and collect gas from the gas collecting chamber 63. The internal exhaust system improves the stability of the movement. The push block 72 and the rotating plate 73 are arranged in a cross-shaped symmetrical manner, so that when cleaning the two opposite air collection chambers 63, the other two air collection chambers 63 can be collected. The rotating plate 73 has a through hole 731 that communicates with the rotating shaft 71, so that when the rotating shaft 71 rotates, the through hole 731 on the rotating plate 73 is filled with clean gas. The air bag 75 is installed at the air inlet of the air collection chamber 63 and the air outlet of the air bag 75 is close to the air inlet of the air collection chamber 63. The end of the air bag 75 facing the spiral channel 621 has an air inlet, and a gas one-way valve 76 is installed at the air inlet to prevent the gas inside the air bag 75 from spreading around during the compression process, so that the gas can flow through the predetermined outlet.

[0042] When the control module 7 is activated and the gas sampling module 6 begins gas sampling, the motor is fixedly mounted on the outer pipe 612. The rotation of the motor drives the rotating shaft 71 to rotate. A groove 711 is formed on the circumferential surface of the rotating shaft 71 near the end of the spiral blade 62. A column 712 is installed at the moving ring 74 on the inner circumferential surface of the inner pipe 611. The column 712 fits into the groove 711. Through the cooperation between the groove 711 and the column 712, the rotating shaft 71 can drive the moving ring 74 to move up and down while rotating. The inclination direction of the groove 711 is from the push block 72 toward the rotating plate 73. The tilting design allows for internal sealing during gas sampling and testing, while leaving the interior unsealed during exhaust, ensuring the accuracy of the test results. The hollow rotating shaft 71 of the hollow 713 can be used to hold clean air. A cross-shaped pusher 72 and a rotating plate 73 are connected to the hollow rotating shaft 71 via through holes 731 on the rotating plate 73. The rotation of the rotating shaft 71 causes the magnetic component 66 at the front end of the rotating plate 73 to attract the magnetic component 66 in front of the baffle plate 64, opening the control valve between the rotating plate 73 and the baffle plate 64, and allowing clean gas to be introduced into the gas collection chamber 63.

[0043] The diameter of the through hole 731 on the rotating plate 73 is larger than the diameter of the flow channel 641. During the rotation of the rotating shaft 71, the through hole 731 on the rotating plate 73 is in contact with the inlet of the flow channel 641 on the baffle plate 64. When the clean gas flows from the through hole 731 on the rotating plate 73 to the flow channel 641 inside the baffle plate 64, the flow velocity of the clean gas increases because the diameter of the through hole 731 is larger than the diameter of the flow channel 641, thus improving the efficiency of the clean gas entering the gas collecting chamber 63. In the same time period, the clean gas can quickly fill the entire gas collecting chamber 63. The excess gas can repeatedly flush the inside of the gas collecting chamber 63, avoiding the presence of residual gas inside the gas collecting chamber 63. The rotating plate 73 is arc-shaped 732, and the orientation of the arc-shaped part of the rotating plate 73 is opposite to the rotation direction of the rotating shaft 71. The arc-shaped rotating plate 73 changes the flow direction of the gas during the rotation. During the rotation of the rotating shaft 71, the gas between the inner tube 611 and the outer tube 612 is... The body moves in one direction, thereby expelling the internal air to the outside and replacing the gas to be tested inside the air duct 61. When the rotating shaft 71 rotates, the push block 72 and the air bag 75 squeeze and draw in the gas. The gas to be tested is collected into the gas collection chamber 63 through the air bag 75. The push block 72 has multiple grooves 721 arranged in a circular array. The width of the grooves 721 is the same as the width of the air bag 75. In one working stroke, the push block 72 can squeeze the air bag 75 multiple times to deliver the gas to be tested to the gas collection chamber 63. This avoids the gas detection results of the gas collection chamber 63 being unrepresentative due to a single squeeze, thereby ensuring the accuracy of the detection results. Through the cross-shaped arrangement of the push block 72 and the rotating plate 73, it is possible to discharge the gas already measured in the other two gas collection chambers 63 while performing gas sampling and detection in one gas collection chamber 63. It can also ensure the sealing of the gas sampling module 6 during gas detection, thereby achieving real-time detection of harmful gases.

[0044] like Figure 8As shown, the staff places this application in the area where hazardous gas detection is required. When the alarm starts working, the installed power supply module 2 supplies power to the alarm, causing the control module 7 to control the gas collection module 6 to collect hazardous gases. The collected gas is then detected by the detection module 3 to check the concentration of hazardous gases. If the concentration exceeds the normal range, an alarm is triggered. The data after each detection is uploaded to the data platform via the communication module 4. Initially, the stepped concave-convex structure between the moving ring 74 and the outer tube 612 is in a closed state. When the air pump 5 collects the gas to be detected from the outside into the gas guide tube 61, the motor in the control module 7 drives the rotating shaft 71 to rotate. The cylinder 712 on the inner circumference of the inner tube 611 interacts with the rotating shaft 71. The inclined groove 711 on the moving shaft 71 engages with the moving ring 74, causing the moving ring 74 to move upward. This narrows the distance between the moving ring 74 and the outer tube 612, increasing the flow velocity of the gas to be measured. The gas then enters the spiral channel 621, where its entry speed is accelerated. Simultaneously, the motor in the control module 7 drives the rotating shaft 71 to rotate. The groove 721 on the push block 72 contacts the airbag 75, causing compression and suction. The gas entering the outer tube 612 is then compressed and suctioned by the airbag 75, passing through the inlet of the gas collecting chamber 63 and the one-way valve 65 to enter the gas collecting chamber 63 for harmful gas component detection. During the compression and suction process of the airbag 75, the rotating shaft 71 drives the inner tube 611 to move upward. At this time, the moving ring 74 achieves the... After the gas guide tube 61 is sealed and the test is completed, the rotating shaft 71 moves down through the inner tube 611, causing the moving ring 74 to release the seal and allowing the gas to be tested to flow. At this time, the symmetrically installed rotating plates 73 attract each other through the magnetic components and the magnetic components 66 installed on the baffle plate 64 inside the corresponding gas collecting chamber 63. The valve at the through hole 731 of the rotating plate 73 is opened to clean the remaining gas collecting chambers. The clean gas inside the hollow rotating shaft 71 enters the flow channel 641 opened in the baffle plate 64 through the rotating plate 73, and then pushes the gas to be tested inside towards the outlet along the trajectory of the flow channel 641. During the movement of the baffle plate 64, the clean gas is compressed. When the clean gas is compressed, it pushes the movable block 68 to move the misaligned hole. When 681 is opened, the pressure of the clean gas in the gas collection chamber 63 is balanced. When the baffle plate 64 moves to the outlet and cooperates with the movable block 68, the misalignment hole 681 is fully aligned with the outlet, and the internal clean gas is completely discharged. After cleaning, the magnetic part 66 on the rotating plate 73 is disengaged from the baffle plate 64, and the electric valve is closed. When the rotating plate 73 cleans the gas collection chamber 63 with the internal clean gas, the push block 72 squeezes and draws air into the airbag 75 through the multiple arrayed grooves 721 for detection. The gas entering the outer tube 612 is squeezed and drawn in by the airbag 75, and enters the gas collection chamber 63 through the air inlet of the gas collection chamber 63 and the one-way valve 65 for detection of harmful gas components. The detection results are uploaded to the platform for recording through the communication module 4.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A hazardous gas monitoring and alarm device, comprising an alarm device body (1), wherein the alarm device body (1) is internally equipped with a power supply module (2), a detection module (3), a communication module (4), and an air pump (5), characterized in that: It also includes a gas sampling module (6) and a control module (7). The gas sampling module (6) is installed on the lower side of the alarm body (1) away from the power supply module (2). A gas guide pipe (61) is installed on the gas sampling module (6). The gas guide pipe (61) has a double-layer structure. The gas guide pipe (61) is divided into an inner pipe (611) and an outer pipe (612). A ventilation port (613) is opened at the lower end of the gas guide pipe (61). The ventilation port (613) is stepped. After the detection module (3) detects the harmful gas components, the control module (7) makes the gas in the gas sampling module (6) unidirectionally circulate. The gas collection module (6) includes a spiral blade (62), a gas collection chamber (63), a baffle plate (64), a one-way valve (65), a magnetic component (66), a return spring (67), a movable block (68), and a folding plate (69). A spiral blade (62) is installed on the left side of the vent (613). The spiral blade (62) fits against the circumferential surface of the inner tube (611) to form a spiral channel (621). A gas collection chamber (63) is installed in a circular row above the spiral channel (621). The gas collection chamber (63) has an outlet and an inlet at both ends. A baffle plate (64) is installed inside the gas collection chamber (63). A slope is opened on one side of the baffle plate (64). A flow channel (641) is opened inside the baffle plate (64). A one-way valve (65) is installed inside the flow channel (641). A magnetic component (66) is installed at the joint between the baffle plate (64) and the front end of the gas collecting chamber (63). The baffle plate (64) is reset by a return spring (67). A movable block (68) is installed on the left side of the baffle plate (64). The movable block (68) has the same inclined surface as the baffle plate (64). When the gas in the gas collecting module (6) is unidirectionally connected, the inclined surface of the movable block (68) is in contact with the inclined surface of the baffle plate (64). The misaligned hole (681) on the movable block (68) is coaxial with the gas outlet of the gas collecting chamber (63). A folding plate (69) is installed in the middle of the side of the gas collecting chamber (63) near the inner tube (611). The control module (7) includes a rotating shaft (71), a pusher (72), a rotating plate (73), a moving ring (74), an airbag (75), and a gas one-way valve (76). The rotating shaft (71) is coaxially mounted with the inner tube (611). The rotating shaft (71) is hollow (713). The pusher (72) and the rotating plate (73) are mounted on the circumferential surface of the rotating shaft (71) and the gas collecting chamber (63) on the same plane. The pusher (72) and the rotating plate (73) are symmetrically arranged. The rotating plate (73) has a through hole. 731) and communicates with the rotating shaft (71), the front end of the rotating plate (73) is equipped with a magnetic component (66) the same as the baffle plate (64), a moving ring (74) is installed on the outer circumferential surface of the inner tube (611) below the rotating plate (73), the air bag (75) is installed at the air inlet of the air collecting chamber (63) and the air outlet of the air bag (75) is in contact with the air inlet of the air collecting chamber (63), the air bag (75) has an air inlet at one end facing the spiral channel (621), and a gas one-way valve (76) is installed at the air inlet.

2. The hazardous gas monitoring and alarm device according to claim 1, characterized in that: The pusher (72) has a plurality of grooves (721) arranged in a circular array, and the width of the grooves (721) is the same as the width of the airbag (75).

3. The hazardous gas monitoring and alarm device according to claim 1, characterized in that: The spiral channel (621) is an inverted cone shape (6211) that gradually increases in size from bottom to top, and the edge thickness of the spiral blade (62) is less than the thickness of the center of the spiral blade (62).

4. A hazardous gas monitoring and alarm device according to claim 3, characterized in that: The spiral blade (62) is provided with a conical protrusion (622), which is located at the middle end of the spiral blade (62).

5. A hazardous gas monitoring and alarm device according to claim 4, characterized in that: The rotating shaft (71) has a groove (711) on its circumferential surface near the end of the spiral blade (62). A column (712) is installed at the moving ring (74) on the inner circumferential surface of the inner tube (611), and the column (712) fits into the groove (711).

6. A hazardous gas monitoring and alarm device according to claim 5, characterized in that: The diameter of the through hole (731) on the rotating plate (73) is larger than the diameter of the flow channel (641). During the rotation of the rotating shaft (71), the through hole (731) on the rotating plate (73) fits against the inlet of the flow channel (641) on the baffle plate (64).

7. A hazardous gas monitoring and alarm device according to claim 6, characterized in that: The rotating plate (73) is arc-shaped (732), and the orientation of the arc-shaped (732) part of the rotating plate (73) is opposite to the rotation direction of the rotating shaft (71).

8. A hazardous gas monitoring and alarm device according to claim 1, characterized in that: The thickness of the folded plate (69) in the contracted state is half the thickness of the baffle plate (64) near the rotating shaft (71). One end of the folded plate (69) is connected to the left side of the inlet of the baffle plate (64) flow channel (641), and the other end is connected to the gas collection chamber (63).

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