Air quality detection alarm method and device

Abstract

The present invention relates to the field of control quality detection technology, and discloses an air quality detection alarm method and device, wherein the detection alarm device includes: a fixed base plate, an air quality sensor is installed in the middle of the top of the fixed base plate, and also includes: two mechanical gas collecting components, the two mechanical gas collecting components are installed on both sides of the top of the fixed base plate in a relative state. The air quality detection alarm method and device, through the Bernoulli principle and the linkage effect of the pressure plate structure, causes the rotating plate to be in a reciprocating rotation state, thereby achieving stretching and compression of the airbag, causing the airflow to continuously enter and exit the interior of the airbag, which is conducive 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 at the same time, the blocking block will also self-seal the channel to achieve the interception of abnormal gas.

Description

Technical Field

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

[0002] With the growing demand for industrial production and environmental monitoring, air quality monitoring devices are widely used in scenarios such as pipelines, ventilation systems, and confined passageways. They monitor gas composition (such as pollutant concentrations and toxic and hazardous gases) in real time and trigger safety responses. Existing technologies typically deploy sensor modules within the passageway. When an air quality anomaly (such as excessive gas concentrations or the presence of hazardous substances) is detected, the system immediately triggers an alarm and shuts down the passageway (for example, by turning off the fan or blocking the airflow) to prevent the abnormal gas from dispersing into the external environment.

[0003] Existing devices usually do not integrate a mechanism for linking gas interception and sampling. 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 testing. 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 alarm. Especially in high-speed airflow environments, the critical sampling window is missed. Since the original gas sample at the time of the anomaly cannot be reliably retained, it is difficult to accurately locate the pollution source, 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:

[0006] An air quality detection and alarm device comprises: a fixed base plate, an air quality sensor is mounted in the middle of the top of the fixed base plate, and two mechanical gas collection assemblies, the two mechanical gas collection assemblies are mounted in an opposing state on both sides of the top of the fixed base plate;

[0007] The mechanical gas collection assembly includes a U-shaped frame fixed to the top of the fixed base 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 the end of the air quality sensor;

[0008] A driving structure is installed on the top of the U-shaped frame near one end of the air quality sensor, a linkage frame is installed on the side of the rotating plate near 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;

[0009] 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, so as to promote airflow in and out of the interior 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 press on the inlet and outlet of the opening and closing structure to seal the collected airflow inside the airbag.

[0010] As an improved technical solution, the driving structure includes a mounting shaft rotatably mounted on the top of the U-shaped frame through two shaft brackets, a rack slidably mounted on the top of the U-shaped frame and located directly below the mounting shaft, and a shaft block mounted on the side of the U-shaped frame away from the air quality sensor. A spur gear meshing with the rack is sleeved in the middle of the mounting shaft, and a bevel gear transmission is installed between the adjacent ends of the mounting shaft and the drive shaft.

[0011] 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 protrusions sliding inside the guide groove are fixed on both sides of the rack.

[0012] 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 provided in the center of the positioning column, and a rotating disc is fixed to the outside of the T-shaped tube. A connecting hole coaxial with the ventilation hole is provided in the center of the rotating disc, and six blocking blocks are arranged between the positioning column and the rotating disc.

[0013] As an improved technical solution, a guide rod is installed at the corner of the blocking block away from the ventilation hole, and a guide groove is provided on the end face of the positioning column close to the rotating disc, and 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 with the same number as the guide rods.

[0014] 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 blocking disk away from the guide slide, 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 opposite surfaces of the magnetic ring 2 and the magnetic ring 1 are in a magnetic attraction state.

[0015] As an improved technical solution, a convex rod is fixed on the peripheral surface of the blocking disk and located between the two convex blocks, and an icicle is provided between the convex rod and the opposite surface of the U-shaped frame.

[0016] The cam plate is fixed on the guide bar at one end and a turbine blade is fixed on the guide bar at one end. A spring shaft 2 is fixed on the guide bar and on the side away from the shaft gun. Two mounting vertical blocks are installed on the top of the guide frame and on the side close to the connecting rod. Spring shaft 1 is fixed on the opposite sides of the two mounting vertical blocks, and spring shaft 1 is fixed on the opposite sides of the two mounting vertical blocks. A spring 1 is installed between the spring shaft 1 and the spring shaft 2 on the same side.

[0017] An air quality detection and alarm method, the process of which is as follows:

[0018] S1: The device is installed in the pipeline as follows: First, water is frozen into icicles. These icicles are placed between the protruding rods and the U-shaped frame, which will propel the blocking plate and the T-shaped tube apart. When air flows through the channel, it blows onto the guide strips. The curved surfaces on the guide strips change the direction of the airflow, pushing the blocking plate away from the U-shaped frame. When the icicles melt, the blocking plate is freed, but the airflow can still keep the blocking plate and the T-shaped tube apart.

[0019] 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 through 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 and the smaller the pressure, 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 drive shaft rotates with the installation shaft, thereby realizing the driving structure to drive the opening and closing structure to rotate through the synchronous belt;

[0020] S3: The opening and closing mechanism operates as follows: When the T-tube rotates, the guide rod, constrained by the guide slot and guide cavity, moves along a predetermined path, driving the block blocks to rotate. At this point, the six combined block blocks move outward, separating to release the airflow from the vents, allowing airflow to pass through the vents and connecting rings and enter the airbag interior for collection.

[0021] S4: At the same time, when the airflow passes through the device, the airflow blows on the turbine blades, driving the wheel shaft to rotate, causing the cam plate to rotate and conflict with the spring shaft 2. The conflict between the cam plate and the spring shaft 2 moves the guide bar and the vertical baffle toward the air quality sensor, and stretches the spring 1. Finally, the cam plate will release the conflict with the spring shaft 2. At this time, the back-stretched spring 1 elastically resets, driving the guide bar and the vertical baffle to reset to their original position. During the reset process, the vertical baffle presses the rotating plate toward the U-shaped frame, compressing the airbag and forcing out most of the airflow stored therein. When the rotating plate is in reverse rotation, the driving structure and the synchronous belt drive the T-tube to rotate in the opposite direction, causing the six blocking blocks to move toward the middle at the same time, and eventually the six blocking blocks merge together to block the ventilation hole, blocking the airflow inside the airbag. The rotating plate reciprocates in this state, continuously sucking in and pushing out the passing airflow, intercepting and storing the airflow;

[0022] 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 disk 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.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention, when the device is installed in the channel, first freezes water into icicles, and places the icicles between the protruding rod and the U-shaped frame, at which time the blocking disk and the T-tube are stretched open, avoiding the magnetic attraction between the first magnetic ring and the second magnetic ring, which fixes the blocking disk to 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 bar, and the curved surfaces on the guide bar are all set to change the direction of the airflow, and the airflow pushes the blocking disk away from the U-shaped frame. When the icicles melt, the blocking disk has no support, but under the blowing action of the airflow, the blocking disk and the T-tube can be kept in a separated state. The icicles are used for auxiliary installation, and the icicles melt naturally over time, without the need for manual disassembly at a later time. The installation method is relatively clever, and the device can be easily installed in the channel in the initial state.

[0025] 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. At the same time, the blocking block will also self-seal the channel to intercept 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

[0026] Figure 1 It is a structural diagram of an air quality detection alarm method and device;

[0027] Figure 2 This is a schematic diagram of the structure of a mechanical gas collection component in an air quality detection and alarm method and device;

[0028] Figure 3 It is a structural diagram of a rotating plate in an air quality detection alarm method and device;

[0029] Figure 4 This is a structural diagram of a pressure plate structure in an air quality detection alarm method and device;

[0030] Figure 5 This is a schematic diagram of the outer structure of a U-shaped frame in an air quality detection and alarm method and device;

[0031] Figure 6 This is a schematic diagram of the outer structure of the U-shaped frame in an air quality detection alarm method and device (excluding the head assembly);

[0032] Figure 7An air quality detection alarm method and device Figure 6 Schematic diagram of the structure at A in the middle;

[0033] Figure 8 This is a structural diagram of an opening and closing structure in an air quality detection alarm method and device;

[0034] Figure 9 The figure is a structural diagram of a head assembly in an air quality detection alarm method and device.

[0035] In the figure: 1. Fixed base 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. Mounting vertical block; 66. Connecting rod; 67. Vertical baffle; 68. Spring shaft 1; 69. Axle gun; 610. Spring 1; 611. Cam plate; 612. Spring shaft 2; 613. Limiting slide cavity; 614. Guide strip; 7. Driving structure; 71. Mounting shaft; 72. Spur gear; 73. Rack; 74. Axle 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 disk; 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

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] See also Figures 1 to 9 The present invention proposes a technical solution, an air quality detection and alarm device, comprising: a fixed base plate 1, an air quality sensor 3 is installed in the middle of the top of the fixed base plate 1, and also comprises: two mechanical gas collection components 2, the two mechanical gas collection components 2 are installed in an opposing state on both sides of the top of the fixed base plate 1, and the air quality sensor 3 is located between the opposing surfaces of the mechanical gas collection components 2 on both sides;

[0038] The mechanical gas collecting assembly 2 includes a U-shaped frame 4 fixed to the top of the fixed base 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 base plate 1, and at the same time, the movable end of the pressure plate structure 6 conflicts with the rotating plate 5, and a driving structure 7 is installed on 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 chamber 13 is opened on 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 chamber 13. An opening and closing structure 9 is rotatably installed in the middle part 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 facing 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;

[0039] 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 interior 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 press on the inlet and outlet of the opening and closing structure 9, sealing the collected airflow inside the airbag 14.

[0040] 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 into 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 at the same time, the blocking block 95 will also self-seal the channel to achieve the interception of 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 is conducive to environmental governance optimization and safety strategy improvement.

[0041] 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 part 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, which are respectively mounted on the mounting shaft 71 and the drive shaft 76.

[0042] 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 protrusions sliding inside the guide groove are fixed on both sides of the rack 73.

[0043] 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 provided in the center of the positioning column 92, and a rotating disk 910 is fixed to the outside of the inside of the T-shaped tube 91. A connecting hole 96 coaxial with the ventilation hole 97 is provided 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 when the six blocking blocks 95 are combined, the ventilation hole 97 and the connecting hole 96 are isolated and blocked.

[0044] A guide rod 99 is installed at the corner of the 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 sliding cavities 98 with the same number as the guide rods 99, and the other end of the guide rod 99 is located inside the guide sliding cavity 98 and is guided to move by the guide sliding cavity 98.

[0045] The head assembly 8 includes a fixed price 81, a guide rod 82 is fixed on the top of the fixed price 81, and a positioning slide 83 is slidably installed on the end of the guide rod 82 close to the U-shaped frame 4, and a coaxial blocking 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 blocking disk 84 away from the guide 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 2 89 is fixed on the end of the blocking disk 84 close to the guide strip 88. The end of the T-tube 91 away from the U-shaped frame 4 is inlaid with a magnetic ring with the same size as the magnetic ring 2 89. 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, it will link to close the channel. At this time, there is no airflow passing through the channel, and the blocking disk 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 the T-tube 91 to block the inlet and outlet, and the intercepted airflow is sealed 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.

[0046] 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. A second spring 811 is installed between the two spring sleeves 810. The setting of the spring sleeve 810 and the second spring 811 serves to position and support the blocking disk 84.

[0047] The peripheral surface of the blocking disk 84 and the two protrusions 85 are fixed with a protruding rod 86, 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 disk 84 and the T-shaped tube 91 will be stretched apart to avoid the magnetic attraction between the magnetic ring 1 94 and the magnetic ring 2 89, which fixes the blocking disk 84 to the open part of the T-shaped tube 91, 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 disk 84 has no support, but under the blowing action of the airflow, it can also keep the blocking disk 84 and the T-shaped tube 91 in a separated state. The icicle 87 is used for auxiliary installation. The icicle 87 melts naturally over time and does not require manual disassembly at a later time. The installation method is more clever and convenient for installing the device into the channel in the initial state.

[0048] 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, and the front and rear end surfaces of the L-shaped frame plate 61 are provided with a limiting sliding cavity 613 connected to its inner cavity. A guide bar 614 is installed in the internal sliding of the guide frame 62, and a connecting rod 66 is fixed to one end of the guide bar 614. A vertical baffle 67 is installed at the 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 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 bar 614 is close to the connecting rod An axis gun 69 is provided at one end of the rod 66, and an axle 64 is rotatably installed on the guide frame 62 through a bearing, and the axle 64 passes through the interior of the axis 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 axis gun 69. 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. 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.

[0049] An air quality detection and alarm method, the process of which is as follows:

[0050] S1: The process for installing the device in the pipeline is as follows: First, water is frozen into icicles 87. Icicles 87 are placed between protruding rods 86 and the U-shaped frame 4. This will push the blocking plate 84 and the T-shaped tube 91 apart. When air flows through the channel, it blows onto guide strips 88. The curved surfaces on guide strips 88 change the direction of the airflow, pushing the blocking plate 84 away from the U-shaped frame 4. When icicles 87 melt, the blocking plate 84 is free, but the airflow can still keep the blocking plate 84 and the T-shaped tube 91 separated.

[0051] 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 is rotated, and under the transmission action of the rotating plate 5, the drive shaft 76 is rotated along with the installation shaft 71, thereby realizing the driving structure 7 to drive the opening and closing structure 9 to rotate through the synchronous belt 11;

[0052] S3: The opening and closing mechanism 9 operates as follows: When the T-tube 91 is rotating, the guide rod 99, limited by the guide slot 93 and the guide cavity 98, moves along a predetermined path, driving the blocking block 95 to rotate. At this point, the six blocking blocks 95 in the combined state move outward, separating to release the airflow from the vents 97, allowing airflow to pass through the vents 97 and the connecting ring 15 and enter the interior of the airbag 14 for collection.

[0053] S4: At the same time, when the airflow passes through the device, the airflow blows on the turbine blades 63, which drives 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 stretched spring 1 610 is elastically reset, driving the guide bar 614 and the vertical baffle 67 to reset to their original position. The baffle 67 presses the rotating plate 5 toward the U-shaped frame 4, compressing the airbag 14 and forcing out most of the airflow stored therein. When the rotating plate 5 rotates in the reverse direction, the driving structure 7 and the synchronous belt 11 work together to drive the T-shaped tube 91 to rotate in the reverse direction, causing the six blocking blocks 95 to move toward the middle simultaneously. Eventually, the six blocking blocks 95 merge together to block the ventilation holes 97, thus sealing the airflow inside the airbag 14. The rotating plate 5 reciprocates in this state, constantly sucking in and pushing out the passing airflow, thereby intercepting and preserving the airflow.

[0054] 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 disk 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 hole 97, thereby completing the sealing of the abnormal airflow inside the airbag 14.

[0055] 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 scope of protection of the present invention.

Claims

1. An air quality detection and alarm device, comprising: A fixed base plate (1), wherein an air quality sensor (3) is installed in the middle of the top of the fixed base plate (1), and is characterized in that it further comprises: two mechanical gas collecting assemblies (2), wherein the two mechanical gas collecting assemblies (2) are installed in an opposing state on both sides of the top of the fixed base plate (1); The mechanical gas collecting assembly (2) comprises a U-shaped frame (4) fixed to the top of the fixed base plate (1) via a pad column, a rotating plate (5) is rotatably mounted in the inner cavity of the U-shaped frame (4), and a pressure plate structure (6) is mounted at the bottom of the U-shaped frame (4) near one end of the air quality sensor (3); A driving structure (7) is installed on the top of the U-shaped frame (4) at one end close to the air quality sensor (3), a linkage frame (12) is installed on the side of the rotating plate (5) close to the pressure plate structure (6), 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), an air bag (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 side 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 a connecting ring (15) is installed between the inlet and outlet of the air bag (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 into and out of the interior of the airbag (14); When there is no airflow passing through, the pressure plate structure (6) presses the rotating plate (5) against the inside of the U-shaped frame (4), and the head assembly (8) presses on the inlet and outlet of the opening and closing structure (9), sealing the collected airflow inside the air bag (14).

2. An air quality detection and 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 the 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 on the middle portion of the mounting shaft (71), and a bevel gear transmission member (75) is installed between the adjacent ends of the mounting shaft (71) and the driving shaft (76).

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

4. An air quality detection and alarm device according to claim 3, characterized in that: The opening and closing structure (9) comprises 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), wherein 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 provided at the center of the positioning column (92), and a rotating disk (910) is fixed to the outside of the interior of the T-shaped tube (91). A connecting hole (96) coaxial with the ventilation hole (97) is provided at the center of the rotating disk (910), and six blocking blocks (95) are provided between the positioning column (92) and the rotating disk (910).

5. An air quality detection and 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), and a guide slot (93) is provided on an end face of the positioning column (92) close to the rotating disc (910), and 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 face of the rotating disc (910) is provided with guide slot cavities (98) the same in number as the guide rods (99).

6. An air quality detection and alarm device according to claim 5, characterized in that: 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), 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 groove (93), a magnetic ring 2 (89) is fixed on the end of the blocking disk (84) close to the guide strip (88), and a magnetic ring 1 (94) with the same size as the magnetic ring 2 (89) is embedded and installed on the end of the T-tube (91) away from the U-shaped frame (4), and the opposite surfaces of the magnetic ring 2 (89) and the magnetic ring 1 (94) are in a magnetic attraction state.

7. An air quality detection and alarm device according to claim 6, characterized in that: A convex rod (86) is fixed to the peripheral surface of the blocking disk (84) and 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 and alarm device according to claim 7, characterized in that: The pressure plate structure (6) includes an L-shaped frame (61), a guide frame (62) is fixed on the lateral end of the L-shaped frame (61), the front and rear end surfaces of the L-shaped frame (61) are both provided with a limit sliding cavity (613) connected to the inner cavity thereof, a guide bar (614) is slidably installed inside the guide frame (62), a connecting rod (66) is fixed at one end of the guide bar (614), a vertical baffle (67) is installed at the end of the connecting rod (66) away from the guide frame (62), an axis gun (69) is provided at the end of the guide bar (614) close to the connecting rod (66), and the guide frame (62) is provided with a guide bar (614) and a guide bar (614) having a plurality of guide bars. ) is rotatably mounted on a wheel axle (64) via a bearing, both ends of the wheel axle (64) are sleeved with a cam plate (611), one end of the cam plate (611) is fixed with a turbine blade (63), a spring shaft 2 (612) is fixed on the guide bar (614) and on the side away from the shaft gun (69), 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), spring shaft 1 (68) is fixed on the opposite sides of the two mounting vertical blocks (65), and a spring 1 (610) is mounted between the spring shaft 1 (68) and the spring shaft 2 (612) on the same side.

9. An air quality detection and alarm method, applied to an air quality detection and alarm device as claimed in claim 8, 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 stretched apart. When air flows through the channel, the air blows onto the guide strip (88). The arc 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) 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 the Bernoulli 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 the rotating state, the guide rod (99) is limited by the guide chute (93) and the guide slide cavity (98), which prompts the guide rod (99) to move along the predetermined path and drives the blocking block (95) to rotate. At this time, the six blocking blocks (95) in the combined state will move toward the outside, and the six blocking blocks (95) will separate and release the blocking of the ventilation hole (97), so that the air flow 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 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. During the reset process, The middle vertical baffle (67) presses the rotating plate (5) toward 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 continuously sucking 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 disk (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), completing the sealing of the abnormal airflow inside the airbag (14).

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