Air quality detection alarm method and device

Abstract

The invention relates to the technical field of control quality detection, and discloses an air quality detection alarm method and device.The detection alarm device comprises a fixed bottom plate, two mechanical gas collection assemblies, a gas collection module, a gas collection module and a control module, and an air quality sensor is installed in the middle of the top of the fixed bottom plate; the two mechanical gas collection assemblies are oppositely installed on the two sides of the top of the fixed bottom plate. According to the air quality detection and alarm method and device, through the Bernoulli principle and under the linkage effect of a pressing plate structure, a rotating plate is made to be in a reciprocating rotating state, so that the air bag is stretched and compressed, airflow is made to continuously enter and exit from the interior of the air bag, the latest airflow is intercepted to enter the interior of the air bag, and the air quality detection and alarm effect is improved. The timeliness of intercepting the airflow is guaranteed, an inlet and an outlet of the opening and closing structure are blocked through the end socket assembly after the airflow is intercepted, meanwhile, the channel is automatically blocked through the stop block, and interception of abnormal gas is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of control quality detection, and in particular to an air quality detection alarm method and device. Background Art

[0002] With the growth of industrial production and environmental monitoring needs, air quality detection devices are widely used in pipelines, ventilation systems or closed passages to monitor gas composition (such as pollutant concentration, toxic and harmful gases, etc.) in real time and trigger safety responses. In the prior art, such devices usually deploy sensor modules inside the passage. When abnormal air quality is detected (such as excessive gas concentration, the presence of hazardous substances), the system will immediately trigger an alarm and shut down the passage (such as turning off the fan or blocking the airflow) to prevent abnormal gases from spreading to the external environment.

[0003] Existing devices usually do not integrate a mechanism for gas interception and sampling linkage. During the shutdown operation, abnormal gases may be quickly diluted or escaped due to the lack of dynamic capture means, resulting in insufficient sample volume or distorted composition during subsequent laboratory inspections. Traditional sampling devices often rely on external trigger signals or manual intervention, and it is difficult to complete gas capture synchronously at the moment of the alarm. Especially in high-speed airflow environments, critical sampling windows are missed. Since the original gas samples when the anomaly occurs cannot be reliably retained, it is difficult to accurately locate the source of pollution, quantify the degree of harm or reproduce the cause of the accident through laboratory analysis afterwards, which restricts the optimization of environmental governance and improvement of safety strategies. Summary of the invention

[0004] The purpose of the present invention is to provide an air quality detection alarm method and device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An air quality detection alarm device comprises: a fixed bottom plate, an air quality sensor is installed in the middle of the top of the fixed bottom plate, and also comprises: two mechanical air collecting components, the two mechanical air collecting components are installed on both sides of the top of the fixed bottom plate in an opposite state; The mechanical gas collection assembly comprises a U-shaped frame fixed to the top of a fixed bottom plate by a pad column, a rotating plate is rotatably installed in the inner cavity of the U-shaped frame, and a pressure plate structure is installed at the bottom of the U-shaped frame near one end of the air quality sensor; A driving structure is installed on the top of one end of the U-shaped frame close to the air quality sensor, a linkage frame is installed on the side of the rotating plate close to the pressure plate structure, and a telescopic universal joint is installed between the top of the linkage frame and the translation end of the driving structure, a storage cavity is opened on the side of the rotating plate away from the pressure plate structure, an airbag is installed in the inner cavity of the storage cavity, an opening and closing structure is rotatably installed in the middle part of the U-shaped frame away from the air quality sensor, a synchronous belt is installed between the driving structure and the opening and closing structure, a head assembly is installed on the side of the U-shaped frame close to the opening and closing structure, and a connecting ring is installed between the inlet and outlet of the airbag and the inlet and outlet of the opening and closing structure; The rotation of the rotating plate can drive the airbag to move, and drive the opening and closing structure to rotate forward and reverse through the driving structure and the synchronous belt, which is used to open and close the inlet and outlet of the opening and closing structure, and promote airflow in and out of the airbag; when there is no airflow passing through, the pressure plate structure will press the rotating plate against the inside of the U-shaped frame, and the head assembly will be pressed against the inlet and outlet of the opening and closing structure to seal the collected airflow inside the airbag.

[0006] As an improved technical solution, the driving structure includes a mounting shaft rotatably installed on the top of the U-shaped frame through two shaft frames, a rack slidably installed on the top of the U-shaped frame and located directly below the mounting shaft, and an axis block installed on the side of the U-shaped frame away from the air quality sensor, a spur gear meshing with the rack is sleeved at the middle part of the mounting shaft, and a bevel gear transmission is installed between the adjacent ends of the mounting shaft and the drive shaft.

[0007] As an improved technical solution, the driving structure also includes two limit bars fixed on the top of the U-shaped frame, and the rack is slidably limited between the two limit bars, a guide groove is provided between the opposite surfaces of the two limit bars, and guide ridges sliding inside the guide groove are fixed on both sides of the rack.

[0008] As an improved technical solution, the opening and closing structure includes a T-shaped tube rotatably mounted on a U-shaped frame, and a positioning column fixed on the U-shaped frame, and the positioning column is located in the inner cavity of the T-shaped tube, and the synchronous belt is installed between the drive shaft and the T-shaped tube. A ventilation hole is opened in the center of the positioning column, and a rotating disk is fixed to the outside of the T-shaped tube, and a connecting hole coaxial with the ventilation hole is opened in the center of the rotating disk, and six blocking blocks are arranged between the positioning column and the rotating disk.

[0009] As an improved technical solution, a guide rod is installed at the corner of one end of the blocking block away from the ventilation hole, a guide groove is provided on the end face of the positioning column close to the rotating disc, one end of the guide rod is located inside the guide groove and is guided to move by the guide groove, and one end face of the rotating disc is provided with guide cavities whose number is the same as that of the guide rods.

[0010] As an improved technical solution, the head assembly includes a fixed price, a guide rod is fixed on the top of the fixed price, a positioning slide is slidably installed on the end of the guide rod close to the U-shaped frame, a coaxial blocking disk is fixed on the end of the positioning slide away from the guide rod, three guide strips with inclined surfaces are fixed at equal intervals on the outer edge of the end of the blocking disk away from the guide slide groove, a magnetic ring 2 is fixed on the end of the blocking disk close to the guide strip, and a magnetic ring 1 with the same size as the magnetic ring 2 is embedded in the end of the T-tube away from the U-shaped frame, and the opposing surfaces of the magnetic ring 2 and the magnetic ring 1 are in a magnetic attraction state.

[0011] As an improved technical solution, a convex rod is fixed on the peripheral surface of the blocking plate and located between the two convex blocks, and an icicle is arranged between the convex rod and the opposite surface of the U-shaped frame.

[0012] As an improved technical solution, the pressure plate structure includes an L-shaped frame plate, a guide frame is fixed on the lateral end of the L-shaped frame plate, and the front and rear end surfaces of the L-shaped frame plate are provided with a limiting sliding cavity connected to the inner cavity thereof, and a guide bar is slidably installed inside the guide frame, and a connecting rod is fixed to one end of the guide bar, and a vertical baffle is installed at the end of the connecting rod away from the guide frame, and an axis gun is opened at the end of the guide bar close to the connecting rod, and a wheel axle is rotatably installed on the guide frame through a bearing, and cam plates are sleeved at both ends of the wheel axle, and a turbine blade is fixed at one end of the cam plate, and a spring shaft 2 is fixed on the guide bar and on the side away from the axis gun, and two mounting vertical blocks are installed on the top of the guide frame and on the side close to the connecting rod, and spring shaft 1 is fixed on the opposite sides of the two mounting vertical blocks, and spring 1 is installed between the spring shaft 1 and spring shaft 2 on the same side.

[0013] An air quality detection and alarm method is characterized in that: its process is as follows: S1: The process of installing the device in the pipeline is as follows: first freeze the water into icicles, and place the icicles between the protruding rods and the U-shaped frame. At this time, the plugging plate and the T-shaped tube will be propped open. When air flows through the channel, the airflow blows onto the guide strips. The curved surfaces on the guide strips are set to change the direction of the airflow. The airflow pushes the plugging plate away from the U-shaped frame. When the icicles melt, the plugging plate has no support, but under the blowing action of the airflow, the plugging plate and the T-shaped tube can be kept separated; S2: When the airflow passes through the device, most of the airflow passes between the mechanical gas collecting components on both sides, and a small part of the airflow passes on the opposite sides of the mechanical gas collecting components on both sides. According to the core of Bernoulli's principle, the greater the flow rate, the smaller the pressure, and the flow rate between the mechanical gas collecting components on both sides is the largest, so it will cause the rotating plate to rotate toward the middle. During the rotation of the U-shaped frame, the linkage frame will drive the rack on the driving structure to move outward. Under the transmission action of the rack and the spur gear, the installation shaft rotates, and under the transmission action of the rotating plate, the driving shaft rotates with the installation shaft, thereby realizing the driving structure driving the opening and closing structure to rotate through the synchronous belt; S3: The working process of the opening and closing structure is as follows: when the T-tube is in a rotating state, the guide rod will move along a predetermined path under the limiting action of the guide slide groove and the guide slide cavity, and drive the blocking block to rotate. At this time, the six blocking blocks in the combined state will move outward, and the six blocking blocks will separate to release the blocking of the ventilation holes, so that the airflow can pass through the ventilation holes and the connecting ring into the interior of the airbag for collection; S4: At the same time, when the airflow passes through the device, the airflow blows on the turbine blades to drive the wheel shaft to rotate, causing the cam plate to rotate and conflict with the spring shaft 2. Through the conflict between the cam plate and the spring shaft 2, the guide bar and the vertical baffle are moved toward the direction of the air quality sensor, and the spring 1 is stretched. Finally, the cam plate will release the conflict with the spring shaft 2. At this time, the back-stretched spring 1 is elastically reset, driving the guide bar and the vertical baffle to reset to the original position. During the reset process, the vertical baffle will press the rotating plate to move toward the U-shaped frame, compress the airbag, and squeeze out most of the airflow stored inside it. When the rotating plate is in reverse rotation, under the linkage of the driving structure and the synchronous belt, the T-tube is driven to rotate in the opposite direction, so that the six blocking blocks move toward the middle at the same time, and finally the six blocking blocks are merged together to block the ventilation hole, blocking the airflow inside the airbag. The rotating plate is in this state reciprocatingly, and it will be in a state of constantly inhaling and pushing out the passing airflow, intercepting and storing the airflow; S5: When the air quality sensor detects abnormal gas, it will close the channel. At this time, there is no airflow passing through the channel, and the blocking plate is not pushed by the airflow. Under the magnetic adsorption of magnetic ring 2 and magnetic ring 1, magnetic ring 2 is combined on the T-tube to block the inlet and outlet, and the intercepted airflow is blocked inside the airbag. At the same time, since there is no airflow passing through the pressure plate structure, the channel rotating plate will push it back to the inside of the U-shaped frame, and under the transmission action of the driving structure and the synchronous belt, the opening and closing structure rotates, prompting the six blocking blocks to merge to block the ventilation holes, thereby completing the sealing of the abnormal airflow inside the airbag.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the device is installed in the channel, water is first frozen into icicles, and the icicles are placed between the convex rod and the U-shaped frame. At this time, the blocking plate and the T-tube are stretched open to avoid the magnetic adsorption of the first magnetic ring and the second magnetic ring, which fixes the blocking plate at the open end of the T-tube, resulting in the airflow being unable to pass through the T-tube into the interior of the airbag. When air flows through the channel, the airflow blows onto the guide strip. The curved surfaces on the guide strip are all arranged to change the direction of the airflow. The airflow pushes the blocking plate away from the U-shaped frame. When the icicles melt, the blocking plate has no support. However, under the blowing action of the airflow, the blocking plate and the T-tube can be kept in a separated state. The icicles are used for auxiliary installation. The icicles melt naturally with the passage of time, and there is no need for manual disassembly at a later stage. The installation method is relatively ingenious, and the device can be easily installed in the channel in the initial state.

[0015] In the present invention, after the device is installed in the channel, the Bernoulli principle and the linkage with the pressure plate structure are used to cause the rotating plate to be in a reciprocating rotation state, thereby realizing the stretching and compression of the airbag, causing the airflow to continuously enter and exit the interior of the airbag, which is beneficial to intercepting the latest airflow entering the interior of the airbag, ensuring the timeliness of intercepting the airflow, and after intercepting the airflow, the inlet and outlet of the opening and closing structure are blocked by the head assembly, and the blocking block will also self-seal the channel at the same time, to achieve the interception of abnormal gas. Automatic interception does not require human intervention, which is beneficial to timely and synchronously complete gas capture in the alarm room, facilitates the precise positioning of pollution sources in the later laboratory analysis, and is beneficial to environmental governance optimization and safety strategy improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an air quality detection alarm method and device; Figure 2 It is a structural schematic diagram of a mechanical gas collection component in an air quality detection alarm method and device; Figure 3 It is a structural schematic diagram of a rotating plate in an air quality detection alarm method and device; Figure 4 It is a structural schematic diagram of a pressure plate structure in an air quality detection alarm method and device; Figure 5 It is a schematic diagram of the outer structure of a U-shaped frame in an air quality detection alarm method and device; Figure 6 This is a schematic diagram of the outer structure of a U-shaped frame in an air quality detection alarm method and device (excluding the head assembly); Figure 7 A method and device for detecting and alarming air quality Figure 6 The structural diagram at A in the middle; Figure 8 It is a structural schematic diagram of an opening and closing structure in an air quality detection alarm method and device; Fig. 9 The present invention is a structural schematic diagram of a head assembly in an air quality detection alarm method and device.

[0017] In the figure: 1, fixed bottom plate; 2, mechanical gas collection assembly; 3, air quality sensor; 4, U-shaped frame; 5, rotating plate; 6, pressure plate structure; 61, L-shaped frame; 62, guide frame; 63, turbine blade; 64, axle; 65, installation vertical block; 66, connecting rod; 67, vertical baffle; 68, spring shaft 1; 69, shaft gun; 610, spring 1; 611, cam plate; 612, spring shaft 2; 613, limit sliding cavity; 614, guide strip; 7, driving structure; 71, installation shaft; 72, spur gear; 73, rack; 74, shaft block; 75, bevel gear transmission; 76, driving shaft; 77, Limit strip; 8. Head assembly; 81. Fixed price; 82. Guide rod; 83. Positioning slide; 84. Blocking plate; 85. Bump; 86. Bump rod; 87. Icicle; 88. Guide strip; 89. Magnetic ring 2; 810. Spring sleeve; 811. Spring 2; 9. Opening and closing structure; 91. T-tube; 92. Positioning column; 93. Guide slide; 94. Magnetic ring 1; 95. Blocking block; 96. Connecting hole; 97. Ventilation hole; 98. Guide slide cavity; 99. Guide rod; 910. Rotating disc; 10. Vertical axis; 11. Synchronous belt; 12. Linkage frame; 13. Storage cavity; 14. Air bag; 15. Connecting ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 9 The present invention proposes a technical solution, an air quality detection alarm device, comprising: a fixed bottom plate 1, an air quality sensor 3 is installed in the middle of the top of the fixed bottom plate 1, and also comprises: two mechanical gas collecting components 2, the two mechanical gas collecting components 2 are installed on both sides of the top of the fixed bottom plate 1 in an opposite state, and the air quality sensor 3 is located between the opposite surfaces of the mechanical gas collecting components 2 on both sides; The mechanical gas collecting assembly 2 includes a U-shaped frame 4 fixed to the top of the fixed bottom plate 1 by a pad column, a rotating plate 5 is rotatably installed in the inner cavity of the U-shaped frame 4, a vertical shaft 10 is rotatably installed at the end of the inner cavity of the U-shaped frame 4 away from the air quality sensor 3 through a bearing, and the end of the rotating plate 5 away from the air quality sensor 3 is sleeved on the vertical shaft 10, a pressure plate structure 6 is installed at the bottom of the U-shaped frame 4 close to the air quality sensor 3, and the pressure plate structure 6 is fixed to the top of the fixed bottom plate 1, and at the same time, the movable end of the pressure plate structure 6 is in conflict with the rotating plate 5, a driving structure 7 is installed at the top of the U-shaped frame 4 close to the air quality sensor 3, and the rotating plate 5 is close to the pressure plate structure 6. A linkage frame 12 is installed on one side of the U-shaped frame 4, and a telescopic universal joint is installed between the top of the linkage frame 12 and the translation end of the driving structure 7. A storage cavity 13 is opened on the side of the rotating plate 5 away from the pressure plate structure 6, and an airbag 14 is installed in the inner cavity of the storage cavity 13. An opening and closing structure 9 is rotatably installed in the middle of the U-shaped frame 4 away from the air quality sensor 3. A synchronous belt 11 is installed between the driving structure 7 and the opening and closing structure 9. A head assembly 8 is installed on the side of the U-shaped frame 4 close to the opening and closing structure 9, and the movable end of the head assembly 8 is opposite to the end of the opening and closing structure 9 away from the U-shaped frame 4. A connecting ring 15 is installed between the inlet and outlet of the airbag 14 and the inlet and outlet of the opening and closing structure 9; The rotation of the rotating plate 5 can drive the airbag 14 to move, and drive the opening and closing structure 9 to rotate forward and reverse through the driving structure 7 and the synchronous belt 11, which is used to open and close the inlet and outlet of the opening and closing structure 9, thereby promoting airflow in and out of the airbag 14; when there is no airflow passing through, the pressure plate structure 6 will press the rotating plate 5 against the inside of the U-shaped frame 4, and the head assembly 8 will be pressed against the inlet and outlet of the opening and closing structure 9, thereby sealing the collected airflow inside the airbag 14.

[0020] When the device is installed in the channel, through the Bernoulli principle and the linkage with the pressure plate structure 6, the rotating plate 5 is caused to be in a reciprocating rotation state, thereby realizing the stretching and compression of the airbag 14, and causing the airflow to continuously enter and exit the interior of the airbag 14, which is conducive to intercepting the latest airflow entering the interior of the airbag 14, ensuring the timeliness of intercepting the airflow, and after intercepting the airflow, the inlet and outlet of the opening and closing structure 9 are blocked through the head assembly 8, and the blocking block 95 will also self-seal the channel to intercept abnormal gas. Automatic interception does not require manual access, which is conducive to timely and synchronous completion of gas capture in the alarm room, facilitating the precise positioning of pollution sources in subsequent laboratory analysis, and facilitating environmental governance optimization and safety strategy improvement.

[0021] The driving structure 7 includes a mounting shaft 71 rotatably mounted on the top of the U-shaped frame 4 through two shaft frames, a rack 73 slidably mounted on the top of the U-shaped frame 4 and located directly below the mounting shaft 71, and a shaft block 74 mounted on the side of the U-shaped frame 4 away from the air quality sensor 3. The telescopic universal joint is installed between the top of the rack 73 and the top of the linkage frame 12. A spur gear 72 meshing with the rack 73 is sleeved at the middle of the mounting shaft 71. A bevel gear transmission member 75 is installed between the adjacent ends of the mounting shaft 71 and the drive shaft 76. The bevel gear transmission member 75 consists of two meshing bevel gears, and the two bevel gears are respectively mounted on the mounting shaft 71 and the drive shaft 76.

[0022] The driving structure 7 also includes two limit bars 77 fixed on the top of the U-shaped frame 4, and the rack 73 is slidably limited between the two limit bars 77. A guide groove is provided between the opposite surfaces of the two limit bars 77, and guide convex strips sliding inside the guide groove are fixed on both sides of the rack 73.

[0023] The opening and closing structure 9 includes a T-shaped tube 91 rotatably mounted on the U-shaped frame 4, and a positioning column 92 fixed on the U-shaped frame 4, and the positioning column 92 is located in the inner cavity of the T-shaped tube 91, and the synchronous belt 11 is installed between the drive shaft 76 and the T-shaped tube 91. A ventilation hole 97 is opened in the center of the positioning column 92, and a rotating disk 910 is fixed to the outside of the T-shaped tube 91. A connecting hole 96 coaxial with the ventilation hole 97 is opened in the center of the rotating disk 910. Six blocking blocks 95 are arranged between the positioning column 92 and the rotating disk 910, and the six blocking blocks 95 are combined to isolate and block the ventilation hole 97 and the connecting hole 96.

[0024] A guide rod 99 is installed at the corner of one end of the blocking block 95 away from the ventilation hole 97, and a guide groove 93 is provided on the end face of the positioning column 92 close to the rotating disk 910, and one end of the guide rod 99 is located inside the guide groove 93 and is guided to move by the guide groove 93. One end face of the rotating disk 910 is provided with guide cavities 98 that are the same in number as the guide rods 99, and the other end of the guide rod 99 is located inside the guide cavity 98 and is guided to move by the guide cavity 98.

[0025] The head assembly 8 includes a fixed price 81, a guide rod 82 is fixed on the top of the fixed price 81, a positioning slide 83 is slidably installed on the end of the guide rod 82 close to the U-shaped frame 4, a coaxial blocking disk 84 is fixed on the end of the positioning slide 83 away from the guide rod 82, and three guide strips 88 with inclined surfaces are fixed at equal intervals on the outer edge of the end of the blocking disk 84 away from the guide slide groove 93. When air flows through the channel, the airflow blows onto the guide strip 88, and the arc surfaces on the guide strip 88 are all set to change the direction of the airflow. The airflow pushes the blocking disk 84 in the direction away from the U-shaped frame 4, and a magnetic ring 89 is fixed on the end of the blocking disk 84 close to the guide strip 88, and a magnetic ring 89 of the same size as the magnetic ring 89 is embedded in the end of the T-tube 91 away from the U-shaped frame 4 Ring 1 94, and the opposite surfaces of magnetic ring 2 89 and magnetic ring 1 94 are in a magnetically attracted state. When the air quality sensor 3 detects abnormal gas, the channel will be closed. At this time, there is no airflow passing through the channel, and the blocking plate 84 is not pushed by the airflow. Under the magnetic adsorption of magnetic ring 2 89 and magnetic ring 1 94, magnetic ring 2 89 is closed on T-tube 91 to block the inlet and outlet, and the intercepted airflow is blocked inside the airbag 14. At the same time, since there is no airflow passing through the pressure plate structure 6, the channel rotating plate 5 will push it back to the inside of the U-shaped frame 4, and under the transmission action of the driving structure 7 and the synchronous belt 11, the opening and closing structure 9 is rotated, prompting the six blocking blocks 95 to merge to block the ventilation holes 97, thereby completing the sealing of the abnormal airflow inside the airbag 14.

[0026] The four corners of the peripheral surface of the blocking disk 84 are integrally formed with protrusions 85, and the opposite surfaces of the protrusions 85 and the U-shaped frame 4 are fixed with spring sleeves 810, and a second spring 811 is installed between the two spring sleeves 810. The setting of the spring sleeve 810 and the second spring 811 plays a role in positioning and supporting the blocking disk 84.

[0027] The peripheral surface of the blocking plate 84 is fixed with a protruding rod 86 between the two protruding blocks 85, and an icicle 87 is set between the protruding rod 86 and the opposite surface of the U-shaped frame 4. When the device is installed in the channel, water is first frozen into icicles 87, and the icicles 87 are placed between the protruding rods 86 and the U-shaped frame 4. At this time, the blocking plate 84 and the T-shaped tube 91 will be stretched apart to prevent the blocking plate 84 from being fixed to the open part of the T-shaped tube 91 due to the magnetic adsorption of the magnetic ring 1 94 and the magnetic ring 2 89, resulting in the airflow being unable to pass through the T-shaped tube 91 into the interior of the airbag 14. At this time, the spring 2 811 is in a stretched state, and when the icicle 87 melts, the blocking plate 84 has no support. However, under the blowing action of the airflow, the blocking plate 84 and the T-shaped tube 91 can be kept in a separated state. The icicle 87 is used for auxiliary installation. The icicle 87 melts naturally over time and does not need to be manually disassembled later. The installation method is more clever and is convenient for installing the device in the channel in the initial state.

[0028] The pressure plate structure 6 includes an L-shaped frame plate 61, the vertical end of the L-shaped frame plate 61 is fixed to the bottom of the U-shaped frame 4, and the horizontal end is installed on the fixed bottom plate 1. A guide frame 62 is fixed to the horizontal end of the L-shaped frame plate 61. The front and rear end surfaces of the L-shaped frame plate 61 are provided with a limit sliding cavity 613 connected to its inner cavity. A guide strip 614 is slidably installed inside the guide frame 62, and a connecting rod 66 is fixed to one end of the guide strip 614. A vertical baffle plate 67 is installed at one end of the connecting rod 66 away from the guide frame 62. A notch is provided at the upper position of the side of the vertical baffle plate 67 away from the connecting rod 66, and a universal ball is installed at the notch. At the same time, the rolling end of the universal ball conflicts with the outer wall surface of the rotating plate 5, and the guide strip 614 is close to the connecting rod. An axle gun 69 is provided at one end of the rod 66, and an axle 64 is rotatably mounted on the guide frame 62 through a bearing, and the axle 64 passes through the interior of the axle gun 69 and the limiting sliding cavity 613. Cam plates 611 are sleeved on both ends of the axle 64, and a turbine blade 63 is fixed to one end of the cam plate 611. A spring shaft 2 612 is fixed on the guide bar 614 and on the side away from the axle gun 69, and the spring shaft 2 612 passes through the interior of the limiting sliding cavity 613 and slides inside the limiting sliding cavity 613. Two mounting vertical blocks 65 are installed on the top of the guide frame 62 and on the side close to the connecting rod 66, and spring shaft 1 68 is fixed on the opposite sides of the two mounting vertical blocks 65, and a spring 1 610 is installed between the spring shaft 1 68 and the spring shaft 2 612 on the same side.

[0029] An air quality detection and alarm method, the process of which is as follows: S1: The process of installing the device in the pipeline is as follows: first freeze water into icicles 87, and place the icicles 87 between the protruding rods 86 and the U-shaped frame 4. At this time, the blocking plate 84 and the T-shaped tube 91 will be propped open. When air flows through the channel, the air blows onto the guide strip 88. The curved surface of the guide strip 88 is set to change the direction of the air flow. The air flow pushes the blocking plate 84 away from the U-shaped frame 4. When the icicles 87 melt, the blocking plate 84 has no support, but under the blowing action of the air flow, the blocking plate 84 and the T-shaped tube 91 can be kept in a separated state; S2: When the airflow passes through the device, most of the airflow passes between the mechanical gas collecting components 2 on both sides, and a small part of the airflow passes on the opposite sides of the mechanical gas collecting components 2 on both sides. According to the core of Bernoulli's principle, the greater the flow rate, the smaller the pressure, and the flow rate between the mechanical gas collecting components 2 on both sides is the largest, so it will cause the rotating plate 5 to rotate toward the middle. During the rotation of the U-shaped frame 4, the linkage frame 12 will drive the rack 73 on the driving structure 7 to move outward. Under the transmission action of the rack 73 and the spur gear 72, the installation shaft 71 rotates, and under the transmission action of the rotating plate 5, the drive shaft 76 rotates with the installation shaft 71, thereby realizing the driving structure 7 driving the opening and closing structure 9 to rotate through the synchronous belt 11; S3: The working process of the opening and closing structure 9 is as follows: when the T-tube 91 is in the rotating state, the guide rod 99, under the limiting action of the guide slot 93 and the guide slide cavity 98, will prompt the guide rod 99 to move along a predetermined path and drive the blocking block 95 to rotate. At this time, the six blocking blocks 95 in the combined state will move outward, and the six blocking blocks 95 will separate to release the blocking of the ventilation hole 97, so that the airflow can pass through the ventilation hole 97 and the connecting ring 15 into the interior of the airbag 14 for collection; S4: At the same time, when the airflow passes through the device, the airflow blows on the turbine blades 63 to drive the wheel shaft 64 to rotate, causing the cam plate 611 to rotate and conflict with the spring shaft 2 612. Through the conflict between the cam plate 611 and the spring shaft 2 612, the guide bar 614 and the vertical baffle 67 are moved toward the direction of the air quality sensor 3, and the spring 1 610 is stretched. Finally, the cam plate 611 will release the conflict with the spring shaft 2 612. At this time, the back-stretched spring 1 610 is elastically reset, driving the guide bar 614 and the vertical baffle 67 to reset to their original positions. The baffle 67 will press the rotating plate 5 to move toward the U-shaped frame 4, compress the airbag 14, and squeeze out most of the airflow stored inside it. When the rotating plate 5 is in reverse rotation, under the linkage of the driving structure 7 and the synchronous belt 11, the T-shaped tube 91 is driven to rotate in the opposite direction, so that the six blocking blocks 95 move toward the middle at the same time, and finally the six blocking blocks 95 are combined together to block the ventilation hole 97, and the airflow is blocked inside the airbag 14. The rotating plate 5 is in this state of reciprocating, and it will be in a state of constantly sucking and pushing out the passing airflow, intercepting and storing the airflow; S5: When the air quality sensor 3 detects abnormal gas, it will close the channel. At this time, there is no airflow passing through the channel, and the blocking plate 84 is not pushed by the airflow. Under the magnetic adsorption of the magnetic ring 2 89 and the magnetic ring 1 94, the magnetic ring 2 89 is combined on the T-tube 91 to block the inlet and outlet, and the intercepted airflow is blocked inside the airbag 14. At the same time, since there is no airflow passing through the pressure plate structure 6, the channel rotating plate 5 will push it back to the inside of the U-shaped frame 4, and under the transmission action of the driving structure 7 and the synchronous belt 11, the opening and closing structure 9 is rotated, prompting the six blocking blocks 95 to merge to block the ventilation holes 97, thereby completing the sealing of the abnormal airflow inside the airbag 14.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air quality detection and alarm device, comprising: A fixed base plate (1), an air quality sensor (3) being installed in the middle of the top of the fixed base plate (1), characterized in that it also comprises: two mechanical air collection components (2), the two mechanical air collection components (2) being installed on both sides of the top of the fixed base plate (1) in an opposing state; The mechanical gas collection assembly (2) comprises a U-shaped frame (4) fixed to the top of a fixed bottom plate (1) via a pad column, a rotating plate (5) rotatably mounted in an inner cavity of the U-shaped frame (4), and a pressure plate structure (6) is mounted at the bottom of one end of the U-shaped frame (4) close to the air quality sensor (3); A driving structure (7) is installed at the top of the U-shaped frame (4) at one end close to the air quality sensor (3); a linkage frame (12) is installed at one side of the rotating plate (5) close to the pressure plate structure (6); a telescopic universal joint is installed between the top of the linkage frame (12) and the translation end of the driving structure (7); a storage cavity (13) is provided at the side of the rotating plate (5) away from the pressure plate structure (6); an airbag (14) is installed in the inner cavity of the storage cavity (13); an opening and closing structure (9) is rotatably installed at the middle part of the U-shaped frame (4) at the side away from the air quality sensor (3); a synchronous belt (11) is installed between the driving structure (7) and the opening and closing structure (9); a head assembly (8) is installed at one side of the U-shaped frame (4) close to the opening and closing structure (9); and a connecting ring (15) is installed between the inlet and outlet of the airbag (14) and the inlet and outlet of the opening and closing structure (9); The rotation of the rotating plate (5) can drive the airbag (14) to move, and drive the opening and closing structure (9) to rotate forward and reverse through the driving structure (7) and the synchronous belt (11), so as to open and close the inlet and outlet of the opening and closing structure (9) and promote airflow in and out of the airbag (14); When no air flows through, the pressure plate structure (6) presses the rotating plate (5) against the inside of the U-shaped frame (4), and the sealing head assembly (8) presses against the inlet and outlet of the opening and closing structure (9), thereby sealing the collected air flow inside the air bag (14).

2. An air quality detection alarm device according to claim 1, characterized in that: The driving structure (7) comprises a mounting shaft (71) rotatably mounted on the top of the U-shaped frame (4) via two shaft frames, a rack (73) slidably mounted on the top of the U-shaped frame (4) and located directly below the mounting shaft (71), and a shaft block (74) mounted on a side of the U-shaped frame (4) away from the air quality sensor (3); a spur gear (72) meshing with the rack (73) is sleeved at the middle of the mounting shaft (71); and a bevel gear transmission member (75) is mounted between adjacent ends of the mounting shaft (71) and the driving shaft (76).

3. An air quality detection alarm device according to claim 2, characterized in that: The driving structure (7) further comprises two limit bars (77) fixed on the top of the U-shaped frame (4), and the rack (73) is slidably limited between the two limit bars (77), a guide groove is provided between the opposite surfaces of the two limit bars (77), and guide convex strips sliding inside the guide groove are fixed on both sides of the rack (73).

4. An air quality detection alarm device according to claim 3, characterized in that: The opening and closing structure (9) comprises a T-shaped tube (91) rotatably mounted on a U-shaped frame (4), and a positioning column (92) fixed on the U-shaped frame (4), wherein the positioning column (92) is located in the inner cavity of the T-shaped tube (91), and a synchronous belt (11) is installed between the drive shaft (76) and the T-shaped tube (91). A ventilation hole (97) is provided at the center of the positioning column (92). A rotating disk (910) is fixed outside the interior of the T-shaped tube (91), and a connecting hole (96) coaxial with the ventilation hole (97) is provided at the center of the rotating disk (910). Six blocking blocks (95) are provided between the positioning column (92) and the rotating disk (910).

5. An air quality detection alarm device according to claim 4, characterized in that: A guide rod (99) is installed at an end corner of the blocking block (95) away from the ventilation hole (97); a guide slot (93) is provided on an end surface of the positioning column (92) close to the rotating disc (910); one end of the guide rod (99) is located inside the guide slot (93) and is guided to move by the guide slot (93); and one end surface of the rotating disc (910) is provided with guide slot cavities (98) whose number is the same as that of the guide rods (99).

6. An air quality detection alarm device according to claim 5, characterized in that: The end cap assembly (8) comprises a fixed price (81), a guide rod (82) is fixed at the top of the fixed price (81), a positioning slide (83) is slidably mounted on the end of the guide rod (82) close to the U-shaped frame (4), a coaxial plugging disk (84) is fixed on the end of the positioning slide (83) away from the guide rod (82), three guide strips (88) with inclined surfaces are fixed at equal intervals on the outer edge of the end of the plugging disk (84) away from the guide groove (93), a magnetic ring 2 (89) is fixed on the end of the plugging disk (84) close to the guide strip (88), and a magnetic ring 1 (94) of the same size as the magnetic ring 2 (89) is embedded and mounted on the end of the T-tube (91) away from the U-shaped frame (4), and the opposing surfaces of the magnetic ring 2 (89) and the magnetic ring 1 (94) are in a magnetic attraction state.

7. An air quality detection alarm device according to claim 6, characterized in that: A convex rod (86) is fixed to the peripheral surface of the blocking plate (84) and is located between the two convex blocks (85), and an icicle (87) is provided between the convex rod (86) and the opposite surface of the U-shaped frame (4).

8. An air quality detection alarm device according to claim 7, characterized in that: The pressure plate structure (6) comprises an L-shaped frame plate (61), a guide frame (62) is fixed to the lateral end of the L-shaped frame plate (61), the front and rear end surfaces of the L-shaped frame plate (61) are both provided with a limit sliding cavity (613) which is in communication with the inner cavity thereof, a guide bar (614) is slidably mounted inside the guide frame (62), a connecting rod (66) is fixed to one end of the guide bar (614), a vertical baffle (67) is mounted on the end of the connecting rod (66) away from the guide frame (62), a shaft gun (69) is provided on the end of the guide bar (614) close to the connecting rod (66), and the guide frame (62) is provided with a plurality of guide rods (614) and a plurality of guide rods (614) which are ... ) is rotatably mounted on the guide frame (62) via a bearing, and cam plates (611) are sleeved at both ends of the wheel axle (64), and a turbine blade (63) is fixed to one end of the cam plate (611), and a spring shaft 2 (612) is fixed on the guide bar (614) and on the side away from the shaft gun (69), and two mounting vertical blocks (65) are mounted on the top of the guide frame (62) and on the side close to the connecting rod (66), and spring shaft 1 (68) is fixed on the opposite sides of the two mounting vertical blocks (65), and a spring 1 (610) is installed between the spring shaft 1 (68) and the spring shaft 2 (612) on the same side.

9. An air quality detection and alarm method, characterized in that: The process is as follows: S1: The process of installing the device in the pipeline is as follows: first, water is frozen into icicles (87), and the icicles (87) are placed between the protruding rods (86) and the U-shaped frame (4). At this time, the blocking plate (84) and the T-shaped tube (91) are propped open. When air flows through the channel, the air blows onto the guide strip (88). The curved surface of the guide strip (88) is arranged to change the direction of the air flow. The air flow pushes the blocking plate (84) away from the U-shaped frame (4). When the icicles (87) melt, the blocking plate (84) is unsupported, but under the blowing action of the air flow, the blocking plate (84) and the T-shaped tube (91) can be kept in a separated state; S2: When the airflow passes through the device, most of the airflow passes between the mechanical gas collecting components (2) on both sides, and a small part of the airflow passes through the opposite sides of the mechanical gas collecting components (2) on both sides. According to the core of Bernoulli's principle, the greater the flow rate, the smaller the pressure. The flow rate between the mechanical gas collecting components (2) on both sides is the largest, so it will cause the rotating plate (5) to rotate toward the middle. During the rotation of the U-shaped frame (4), the linkage frame (12) will drive the rack (73) on the driving structure (7) to move outward. Under the transmission action of the rack (73) and the spur gear (72), the installation shaft (71) rotates, and under the transmission action of the rotating plate (5), the drive shaft (76) rotates with the installation shaft (71), thereby realizing the driving structure (7) driving the opening and closing structure (9) to rotate through the synchronous belt (11); S3: The working process of the opening and closing structure (9) is as follows: when the T-tube (91) is in a rotating state, the guide rod (99) is limited by the guide slot (93) and the guide slot cavity (98), which causes the guide rod (99) to move along a predetermined path and drives the blocking block (95) to rotate. At this time, the six blocking blocks (95) in the combined state move outward, and the six blocking blocks (95) separate to release the blocking of the ventilation hole (97), so that the airflow can pass through the ventilation hole (97) and the connecting ring (15) and enter the interior of the air bag (14) for collection; S4: At the same time, when the airflow passes through the device, the airflow blows on the turbine blades (63) and drives the wheel shaft (64) to rotate, causing the cam plate (611) to rotate and contact the spring shaft 2 (612). Through the contact between the cam plate (611) and the spring shaft 2 (612), the guide bar (614) and the vertical baffle (67) are moved toward the direction of the air quality sensor (3), and the spring 1 (610) is stretched. Finally, the cam plate (611) will release the contact with the spring shaft 2 (612). At this time, the back-stretched spring 1 (610) is elastically reset, driving the guide bar (614) and the vertical baffle (67) to return to their original positions. During the reset process, The middle vertical baffle (67) presses the rotating plate (5) to move in the direction of the U-shaped frame (4), compresses the airbag (14), and pushes out most of the airflow stored therein. When the rotating plate (5) is in reverse rotation, under the linkage action of the driving structure (7) and the synchronous belt (11), the T-shaped tube (91) is driven to rotate in the reverse direction, so that the six blocking blocks (95) move toward the middle at the same time, and finally the six blocking blocks (95) are combined together to block the ventilation hole (97), thereby blocking the airflow inside the airbag (14). The rotating plate (5) is in this state of reciprocating, and is in a state of constantly sucking in and pushing out the passing airflow, thereby intercepting and storing the airflow. S5: When the air quality sensor (3) detects abnormal gas, it will close the channel. At this time, there is no airflow passing through the channel, and the blocking plate (84) is not pushed by the airflow. Under the magnetic adsorption of the second magnetic ring (89) and the first magnetic ring (94), the second magnetic ring (89) is combined with the T-tube (91) to block the inlet and outlet, and the intercepted airflow is blocked inside the airbag (14). At the same time, since there is no airflow passing through the pressure plate structure (6), the channel rotating plate (5) pushes it back to the inside of the U-shaped frame (4), and under the transmission action of the driving structure (7) and the synchronous belt (11), the opening and closing structure (9) rotates, prompting the six blocking blocks (95) to merge to block the ventilation hole (97), thereby completing the sealing of the abnormal airflow inside the airbag (14).

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