An audible and visual alarm

Abstract

The present invention relates to the field of alarms, and discloses an audible and visual alarm, which includes a housing with an audible and visual alarm fixedly installed inside. The bottom of the housing is fixedly connected with a fixed driving mechanism. The fixed driving mechanism includes a positioning pipe, and a flipping and extending mechanism is rotatably connected to the positioning pipe. An air suction mechanism is fixedly installed on the flipping and extending mechanism. The air suction mechanism includes a first extension pipe, and a second extension pipe is arranged inside the first extension pipe. The flipping and extending mechanism is used to drive the air suction mechanism to continuously unfold and merge, and absorb gases at different positions and in different directions. A suction nozzle is fixedly connected to the bottom of the second extension pipe. The suction nozzle will change its shape as the first extension pipe and the second extension pipe unfold and merge, changing the air suction mode of the second extension pipe. In view of the density difference between natural gas and liquefied petroleum gas, this alarm can absorb gases in the upper and lower layers of the space, effectively avoiding detection blind spots caused by the gas distribution characteristics, and greatly improving the accuracy of detecting gas leaks of different types.

Description

Technical Field

[0001] The present invention relates to the technical field of alarm, and more specifically, it relates to an audible and visual alarm. Background Art

[0002] An audible and visual alarm is a safety device that alerts people to potential dangers by emitting sound and light signals in emergency situations. There are many types of audible and visual alarms, and the gas audible and visual alarm is one of them. The gas audible and visual alarm mainly uses sensors to detect the concentration of combustible gas in the environment. The detection sensitivity of the gas audible and visual alarm depends on whether the gas can pass through effectively.

[0003] During the renovation of old urban areas, there will be situations where two types of gas are used simultaneously during some transitional periods. For example, when a region is converting from liquefied petroleum gas supply to natural gas pipeline supply, some households will temporarily retain liquefied petroleum gas equipment for some functions (such as taking a bath with a liquefied petroleum gas water heater) when the natural gas pipeline has not been fully connected to all gas-using devices (such as the outdoor gas water heater has not been renovated and connected to the natural gas pipeline). In this way, there will be two different gases transported through two gas pipelines in the home. Different from liquefied petroleum gas, natural gas is light and will float at the top of the space where it is located with the air, while liquefied petroleum gas is heavy and will fall to the bottom of the space where it is located.

[0004] The installation position of the traditional audible and visual alarm is fixed. When the above two types of gas leak, the leaked gas will be distributed one above and one below. The traditional audible and visual alarm can only detect one place and cannot achieve more comprehensive gas leak detection. Therefore, we have designed an audible and visual alarm. Summary of the Invention

[0005] The present invention provides an audible and visual alarm to solve the technical problem in the related art that the installation position of the traditional audible and visual alarm is fixed. When the above two types of gas leak, the leaked gas will be distributed one above and one below. The traditional audible and visual alarm can only detect one place and cannot achieve more comprehensive gas leak detection.

[0006] An audible and visual alarm includes a housing with an audible and visual alarm fixedly installed inside. A fixed driving mechanism is fixedly connected to the bottom of the housing. The fixed driving mechanism includes a positioning tube. A flipping and extending mechanism is rotatably connected to the positioning tube. An air suction mechanism is fixedly installed on the flipping and extending mechanism. The air suction mechanism includes a first extension tube. A plurality of second extension tubes are slidably connected inside the first extension tube in a gradually decreasing manner. The flipping and extending mechanism is used to drive the air suction mechanism to continuously unfold and merge, and absorb gases at different positions and in different directions. The bottom of the second extension tube is fixedly connected to an air suction nozzle. The air suction nozzle will change its shape as the first extension tube and the second extension tube unfold and merge, changing the air suction mode of the second extension tube.

[0007] As a further optimization scheme of the present invention, the positioning tube is fixedly connected to the shell, a plurality of fixing frames are fixedly connected to the inner wall of the inner cavity of the positioning tube, a motor cover is fixedly connected inside the plurality of fixing frames, a dual-axis motor is fixedly installed inside the motor cover, a fan blade is fixedly connected to the top power output shaft of the dual-axis motor, and a drive shaft is fixedly connected to the bottom power output shaft of the dual-axis motor.

[0008] As a further optimization scheme of the present invention, the flip extension mechanism includes an extension component and a rotating tube. The rotating tube is rotatably connected to the positioning tube, the rotating tube is fixedly connected to the driving shaft, a toggle component is rotatably installed inside the rotating tube, the toggle component is fixedly connected to a fixed frame, an air pipe is rotatably installed through the rotating tube, the air pipe is fixedly connected to a mounting plate, two driving columns are fixedly connected to the mounting plate, and a sliding component is fixedly connected to the driving column.

[0009] As a further optimization scheme of the present invention, the toggle assembly includes a sealing ring, which is rotatably connected to a rotating tube, and the sealing ring is fixedly connected to a fixed frame. A first fixed tube is fixedly connected to the sealing ring, and a plurality of driving grooves are provided on the first fixed tube. A second fixed tube is arranged inside the first fixed tube, and the second fixed tube is fixedly connected to the sealing ring, and a limiting plate is fixedly connected to the second fixed tube.

[0010] As a further optimization solution of the present invention, the sliding assembly includes a second sliding tube, the second sliding tube is slidably connected to the first sliding tube, and the first sliding tube is fixedly connected to the first extension tube.

[0011] As a further optimization scheme of the present invention, the extension component includes a mounting cover, which is fixedly connected to the rotating tube, a reciprocating screw is arranged inside the rotating tube, the reciprocating screw is rotatably connected to the rotating tube, a first pulley is fixedly connected to the reciprocating screw, a second pulley is fixedly connected to the air pipe, the first pulley and the second pulley are connected by a first driving belt, a threaded drive frame is threadedly connected to the reciprocating screw, the threaded drive frame is slidably connected to the mounting cover, an extension plate is fixedly connected to the top of the threaded drive frame, a drive ring is arranged between the two extension plates, and the drive ring is fixedly connected to the first sliding tube.

[0012] As a further optimized solution of the present invention, a limiting ring is fixedly connected to the second extension pipe. The suction nozzle includes a counterweight ring, and the counterweight ring is fixedly connected to the second extension pipe. A plurality of mounting grooves are formed in the second extension pipe, a third rotating shaft is fixedly connected inside the mounting groove, a rotating plate is rotatably connected to the third rotating shaft, a torsion spring is sleeved on the third rotating shaft, and two ends of the torsion spring are respectively connected to the rotating plate and the counterweight ring. A folding soft sleeve is fixedly connected to the bottom of the counterweight ring, and the folding soft sleeve is fixedly connected to the rotating plate.

[0013] As a further optimized solution of the present invention, a connecting block is fixedly connected to the top of the second sliding pipe, a driving tooth rack is fixedly connected to the top of the connecting block, a first gear is meshed with the driving tooth rack, a first rotating shaft is fixedly connected to the first gear, the first rotating shaft is rotatably connected to the first sliding pipe, a third belt pulley is fixedly connected to the first rotating shaft, a second rotating shaft is rotatably installed on the first sliding pipe, a fourth belt pulley is fixedly connected to the second rotating shaft, the third belt pulley and the fourth belt pulley are connected by a second driving belt, and a cam is fixedly connected to the second rotating shaft.

[0014] As a further optimized solution of the present invention, a positioning plate is fixedly connected to the top of the first extension pipe, a sliding rod is slidably connected to the positioning plate, a pressing plate is fixedly connected to the sliding rod, a first spring is sleeved on the sliding rod, and two ends of the first spring are respectively connected to the positioning plate and the pressing plate. A hose is arranged between the positioning plate and the pressing plate, and the hose is fixedly connected to and communicated with the first extension pipe.

[0015] As a further optimized solution of the present invention, a threaded cover is arranged below the housing, and the threaded cover is threadedly connected to the housing.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. An acoustic-optic alarm described in the present invention. In view of the density difference between natural gas and liquefied petroleum gas, through the ingeniously designed structure of the first extension pipe and multiple sections of the second extension pipe, the alarm can rotate and flip around the positioning pipe driven by a biaxial motor. When the second extension pipe is above the first extension pipe, it can contract to absorb the gas in the upper layer of the space to detect natural gas leakage; when it is below, it unfolds close to the bottom of the space to absorb the gas in the lower layer to detect liquefied petroleum gas leakage, effectively avoiding the detection blind area caused by the gas distribution characteristics, and greatly improving the accuracy of detecting different types of gas leakage; the shape of the suction nozzle changes with the unfolding and merging of the first extension pipe and the second extension pipe. When in the upper layer, it is cylindrical, with uniform and stable suction, which is conducive to accurately absorbing the gas in the upper layer in a small range and ensuring the accuracy of detecting natural gas, a lighter gas; when in the lower layer, it becomes flared, using the Venturi effect to generate strong suction, which can absorb the heavier liquefied petroleum gas in the lower layer over a long distance and a large range, further enhancing the targeted detection ability for gas at different positions.

[0018] 2. An acoustic-optic alarm described in the present invention. The rotating pipe in the flipping and extending mechanism is rotatably connected to the positioning pipe, and the rotation of the gas transmission pipe can drive the driving column to move. Combining the driving groove of the first fixed pipe and the limiting plate of the second fixed pipe enables the first extension pipe and the second extension pipe to not only rotate but also flip, with rich and diverse movement trajectories, and can flexibly adjust positions in three-dimensional space, comprehensively covering the space where it is located, significantly expanding the detection range, and being able to more effectively take into account the gas leakage conditions in every corner of the space; the rotation of the gas transmission pipe can also drive the reciprocating lead screw to rotate through a pulley and a driving belt, and then make the threaded driving frame move, pushing the driving ring to drive the first sliding pipe to move, so that the first extension pipe and the second extension pipe are further extended during the rotation and flipping process, further expanding the detectable space area, and effectively improving the integrity of detecting gas leakage in a large area of space.

[0019] 3. An acoustic-optic alarm described in the present invention. When the first sliding pipe moves, a series of transmission structures cause the cam to rotate and squeeze the pressure plate. The pressure plate continuously squeezes and releases the hose. Each squeeze compresses and discharges the air in the hose, increasing the air pressure, and the air pressure decreases when released, forming a large air pressure difference, thereby promoting the first extension pipe and the second extension pipe to increase the air intake volume and accelerate the gas inhalation speed. More gas samples can be collected for detection within a unit time, improving the detection efficiency and reducing the risk of missed detection due to insufficient air intake; the fan blade connected to the power output shaft at the top of the biaxial motor rotates, which can accelerate the gas flow and provide power assistance for the air intake mechanism, enabling the gas to more smoothly enter the detection end of the acoustic-optic alarm through the gas transmission pipe, the first extension pipe, the second extension pipe and the suction nozzle. Acting in synergy with the hose compression, it further enhances the overall air intake effect and ensures the high efficiency and reliability of detecting gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the threaded cover of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the positioning tube, the rotating tube and the mounting cover of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0025] Figure 6 It is a structural schematic diagram of the toggle assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the connection between the gas delivery pipe and the driving column of the present invention;

[0027] Figure 8 It is a schematic diagram of the connection between the first sliding tube and the second sliding tube of the present invention;

[0028] Figure 9 It is a schematic diagram of the connection between the first rotating shaft and the second rotating shaft of the present invention;

[0029] Figure 10 It is a schematic diagram of the connection between the positioning plate and the pressing plate of the present invention;

[0030] Figure 11 It is a schematic diagram of the connection between the first extension tube and the second extension tube of the present invention;

[0031] Figure 12 It is a structural schematic diagram of the air suction nozzle of the present invention.

[0032] In the figure: 1. Housing; 101. Alarm lamp; 102. Buzzer; 2. Threaded cover; 301. Positioning tube; 302. Fan blade; 303. Biaxial motor; 304. Motor cover; 305. Fixed bracket; 306. Drive shaft; 401. Installation cover; 402. Rotating tube; 403. First fixed tube; 404. First sliding tube; 405. Drive ring; 406. Gas transmission pipe; 407. Second sliding tube; 408. Drive column; 409. Installation plate; 410. Sealing ring; 411. Drive groove; 412. Limiting plate; 413. Second fixed tube; 501. Reciprocating lead screw; 502. Threaded drive frame; 503. Extension plate; 504. First drive belt; 505. First pulley; 506. Second pulley; 601. Second drive belt; 602. Third pulley; 603. First rotating shaft; 604. Drive rack; 605. Connecting block; 606. First gear; 607. Second rotating shaft; 608. Cam; 609. Fourth pulley; 610. First spring; 611. Slide bar; 612. Positioning plate; 613. Pressing plate; 701. First extension tube; 702. Hose; 703. Second extension tube; 801. Limiting ring; 802. Folding soft sleeve; 803. Third rotating shaft; 804. Counterweight ring; 805. Rotating plate. Detailed implementation manners

[0033] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described in some examples can also be combined in other examples.

[0034] As Figures 1 to 12 shown, an acoustic - optical alarm of an embodiment of the present invention includes a housing 1. An acoustic - optical alarm with an alarm lamp 101, a buzzer 102, and a gas sensor is fixedly installed inside the housing 1. The bottom of the housing 1 is fixedly connected with a fixed driving mechanism. The fixed driving mechanism includes a positioning tube 301. A flipping and extending mechanism is rotatably connected to the positioning tube 301. An air - suction mechanism is fixedly installed on the flipping and extending mechanism. The air - suction mechanism includes a first extension tube 701. A plurality of second extension tubes 703 which are slidably connected in a gradually reducing manner are arranged inside the first extension tube 701. The flipping and extending mechanism drives the air - suction mechanism to continuously unfold and merge, so as to absorb gases at different positions and can switch the suction angle. The bottom of the second extension tube is fixedly connected with a suction nozzle, and the suction nozzle changes its shape as the first extension tube and the second extension tube unfold and merge, switching between a flared shape and a round - mouth shape.

[0035] Please refer to Figure 3The positioning tube 301 is fixedly connected to the shell 1, and a plurality of fixing frames 305 are fixedly connected to the inner wall of the inner cavity of the positioning tube 301. A motor cover 304 is fixedly connected inside the plurality of fixing frames 305. A dual-axis motor 303 is fixedly installed inside the motor cover 304. The fan blades 302 are fixedly connected to the top power output shaft of the dual-axis motor 303, and the drive shaft 306 is fixedly connected to the bottom power output shaft of the dual-axis motor 303.

[0036] Please refer to Figure 3 , Figure 7 The flip extension mechanism includes an extension component and a rotating tube 402. The rotating tube 402 is rotatably connected to the positioning tube 301. The rotating tube 402 is fixedly connected to the driving shaft 306. A toggle component is rotatably installed inside the rotating tube 402. The toggle component is fixedly connected to the fixed frame 305. An air pipe 406 is rotatably installed through the rotating tube 402. The air pipe 406 is fixedly connected to a mounting plate 409. Two driving columns 408 are fixedly connected to the mounting plate 409. A sliding component is fixedly connected to the driving column 408.

[0037] Please refer to Figure 6 The toggle assembly includes a sealing ring 410, which is rotatably connected to the rotating tube 402, and the sealing ring 410 is fixedly connected to the fixing frame 305. The sealing ring 410 is fixedly connected to the first fixing tube 403, and a plurality of driving grooves 411 are provided on the first fixing tube 403. A second fixing tube 413 is arranged inside the first fixing tube 403, and the second fixing tube 413 is fixedly connected to the sealing ring 410, and a limiting plate 412 is fixedly connected to the second fixing tube 413.

[0038] Please refer to Figure 8 The sliding assembly includes a second sliding tube 407 , the first sliding tube 404 is slidably connected to the second sliding tube 407 , and the first sliding tube 404 is fixedly connected to the first extension tube 701 .

[0039] Please refer to Figures 3 to 6 The extension component includes a mounting cover 401, which is fixedly connected to the rotating tube 402. A reciprocating screw rod 501 is arranged inside the rotating tube 402. The reciprocating screw rod 501 is rotatably connected to the rotating tube 402. A first pulley 505 is fixedly connected to the reciprocating screw rod 501, and a second pulley 506 is fixedly connected to the air pipe 406. The first pulley 505 and the second pulley 506 are connected by a first driving belt 504. A threaded drive frame 502 is threadedly connected to the reciprocating screw rod 501, and the threaded drive frame 502 is slidably connected to the mounting cover 401. An extension plate 503 is fixedly connected to the top of the threaded drive frame 502, and a drive ring 405 is arranged between the two extension plates 503. The drive ring 405 is fixedly connected to the first sliding tube 404.

[0040] The present invention mainly relies on sound and light alarms, a first extension tube 701, and multiple second extension tubes 703 to detect and alarm for gas leaks. Due to the differences between natural gas and liquefied petroleum gas, natural gas is lighter than air and will float on the top of the space where it is located, while liquefied petroleum gas is heavier than air and will be at the bottom of the space where it is located. Specifically, when using the sound and light alarm to detect whether there is a gas leak in the alarm space, the shell 1 is first fixed by an external fixed bracket, and then the first extension tube 701 and the second extension tube 703 are driven to flip, and the multiple second extension tubes 703 are continuously expanded and merged in the first extension tube 701, so that the sound and light alarm can absorb different gases at the upper and lower ends and transport the gas to the sound and light alarm to detect whether the gas contains gas. The gas transported in will gather around the gas sensor, and the gas The sensor continuously monitors the gas concentration in the surrounding gas. When the concentration of gas in the air reaches a certain threshold, the sensor will sense this change and convert it into an electrical signal; the electrical signal output by the sensor is transmitted to the control circuit, and the control circuit amplifies, filters, and performs analog-to-digital conversion on the signal, converts it into a digital signal, and compares it with the preset alarm threshold; when the detected gas concentration signal exceeds the alarm threshold, the control circuit triggers the alarm device, drives the buzzer 102 to emit a loud alarm sound, and lights up the alarm light 101 at the same time, to remind the user of gas leakage with sound and light signals; alarm release and recovery: when the gas concentration drops below the alarm threshold, the control circuit stops driving the alarm device, the sound and light alarm signal is released, and the alarm returns to the normal monitoring state, effectively judging whether there is a gas leak in the space.

[0041] In order to detect whether there is leakage of different gases in two groups of pipelines, the present invention uses the dual-axis motor 303 in the driving mechanism to drive the first extension tube 701 and the second extension tube 703 to rotate around the positioning tube 301. During the rotation, the driving groove 411 on the first fixed tube 403 and the limiting plate 412 on the second fixed tube 413 are used to turn the first extension tube 701 and the second extension tube 703. When the second extension tube 703 is located above the first extension tube 701, the second extension tube 703 is completely retracted into the first extension tube 701, so that the positioning tube 301 can be absorbed. The air in the upper layer of the space can be detected to detect whether there is any natural gas in the air in the upper layer of the space, and when the second extension tube 703 is located below the first extension tube 701, due to its own weight, the multiple sections of the second extension tube 703 will all slide down, so that the air intake port can be closer to the bottom of the space, so that the air in the lower layer of the space can be absorbed to detect whether there is any liquefied petroleum gas in the air in the lower layer of the space, and the first extension tube 701 and the second extension tube 703 can not only rotate but also flip over, and the flipping can involve more motion trajectories, which can more effectively take into account the leakage detection of natural gas and liquefied petroleum gas within a certain range of the space.

[0042] Furthermore, during the flipping process of the first extension pipe 701 and the second extension pipe 703, the gas transmission pipe 406 will also rotate accordingly. The rotation of the gas transmission pipe 406 will cause the drive ring 405 in the extension assembly to move. The movement of the drive ring 405 can cause the first sliding pipe 404 to drive the first extension pipe 701 and the second extension pipe 703 to move. In this way, during the process of the first extension pipe 701 and the second extension pipe 703 rotating around the positioning pipe 301 and flipping, they can further extend outwards, expanding the detectable space, and further taking into account the leakage detection of natural gas and liquefied petroleum gas in a larger range of the surrounding space.

[0043] Please refer to Figure 10 、 Figure 12 A limiting ring 801 is fixedly connected to the second extension pipe 703. The suction nozzle includes a counterweight ring 804 which is fixedly connected to the second extension pipe 703. A plurality of mounting grooves are formed in the second extension pipe 703. A third rotating shaft 803 is fixedly connected inside the mounting groove. A rotating plate 805 is rotatably connected to the third rotating shaft 803. A torsion spring is sleeved on the third rotating shaft 803, and two ends of the torsion spring are respectively connected to the rotating plate 805 and the counterweight ring 804. A folding soft sleeve 802 is fixedly connected to the bottom of the counterweight ring 804, and the folding soft sleeve 802 is fixedly connected to the rotating plate 805. The suction nozzle replaces the suction end of the second extension pipe 703. When the second extension pipe 703 is above the first extension pipe 701, such a suction nozzle is a cylindrical suction nozzle. The structure of the cylindrical suction nozzle makes its suction force evenly distributed. When absorbing gas, the air flow converges uniformly from all around to the center, forming a stable vortex, which is more suitable for absorbing gas in a small area in the upper layer of the surrounding space. When the second extension pipe 703 is below the first extension pipe 701, such a suction nozzle is a flared suction nozzle. When the gas of the flared suction nozzle enters from the large opening and flows towards the small opening, the flow rate increases and the pressure decreases, generating a strong suction force at the inlet, which can absorb the gas in the lower layer of the surrounding space over a longer distance and a larger range, promoting the detection of gas leakage.

[0044] Please refer to Figure 5 、 Figures 10 to 11, a connecting block 605 is fixedly connected to the top of the second sliding pipe 407. A driving rack 604 is fixedly connected to the top of the connecting block 605. A first gear 606 is meshed with the driving rack 604. A first rotating shaft 603 is fixedly connected to the first gear 606. The first rotating shaft 603 is rotatably connected to the first sliding pipe 404. A third pulley 602 is fixedly connected to the first rotating shaft 603. A second rotating shaft 607 is rotatably installed on the first sliding pipe 404. A fourth pulley 609 is fixedly connected to the second rotating shaft 607. The third pulley 602 and the fourth pulley 609 are connected by a second driving belt 601. A cam 608 is fixedly connected to the second rotating shaft 607. A positioning plate 612 is fixedly connected to the top of the first extension pipe 701. A sliding rod 611 is slidably connected to the positioning plate 612. A pressing plate 613 is fixedly connected to the sliding rod 611. A first spring 610 is sleeved on the sliding rod 611. Two ends of the first spring 610 are respectively connected to the positioning plate 612 and the pressing plate 613. A hose 702 is arranged between the positioning plate 612 and the pressing plate 613. The hose 702 is fixedly connected to and communicated with the first extension pipe 701; Compressing the hose 702 can promote the first extension pipe 701 and the second extension pipe 703 to increase the air intake. When the first extension pipe 701 and the second extension pipe 703 move due to the movement of the first sliding pipe 404, the cam 608 will rotate and press the pressing plate 613, so that the pressing plate 613 continuously presses and releases the hose 702. Each time it is pressed, the air in the hose 702 is compressed and discharged, and the air pressure rises; Each time it is released, the volume in the hose 702 is restored and the air pressure drops. The larger air pressure difference can prompt more gas to be inhaled per unit time, thereby increasing the gas intake and expanding the range of detecting gas leakage.

[0045] Working principle: After the housing 1 is fixedly installed, rotate the threaded cover 2 to remove the threaded cover 2. Start the double-shaft motor 303, and the double-shaft motor 303 will drive the fan blade 302 to rotate. The fan blade 302 will absorb the gas in the space through the air delivery pipe 406, the first extension pipe 701, the second extension pipe 703, and the suction nozzle. The gas that is evacuated and enters will be transported to the detection end of the sound and light alarm for detection to determine whether the gas contains combustible gas; after the double-shaft motor 303 is started, it will also drive the drive shaft 306 to rotate, and the drive shaft 306 will drive the rotating pipe 402 to rotate. The rotation of the rotating pipe 402 will drive the air delivery pipe 406 to rotate together. During the rotation of the air delivery pipe 406, the drive column 408 will be driven to rotate together. When the drive column 408 rotates to the drive groove 411, due to the limit plate 412 and the drive groove 411, the air delivery pipe 406 will rotate on its own. In this way, the first sliding pipe 404 and the second sliding pipe 407 will also drive the first extension pipe 701 and the second extension pipe 703 to rotate. When the second extension pipe 703 is above the first extension pipe 701, the first extension pipe 701 and the second extension pipe 703 contract together to absorb the upper-layer gas in the space and detect whether the upper-layer gas contains combustible gas. When the second extension pipe 703 is below the first extension pipe 701, the first extension pipe 701 and the second extension pipe 703 expand, and the first extension pipe 701 and the second extension pipe 703 can extend to the lower part of the space to absorb the gas in the lower part and detect whether the lower-layer gas contains combustible gas; and during the flipping process of the first extension pipe 701 and the second extension pipe 703, when the first extension pipe 701 and the second extension pipe 703 are combined, the limit ring 801 limits the rotating plate 805 so that the suction nozzle is in the shape of a cylindrical suction nozzle, which can further stably suck air. When the first extension pipe 701 and the second extension pipe 703 expand, the suction nozzle will be in the shape of a flared suction nozzle, which can absorb gas in a larger range for detection. Moreover, the rotation of the air delivery pipe 406 will also drive the reciprocating lead screw 501 to rotate through the first pulley 505, the second pulley 506, and the first drive belt 504. The reciprocating lead screw 501 drives the threaded drive frame 502 to move, the threaded drive frame 502 drives the extension plate 503 to move, the extension plate 503 drives the drive ring 405 to move, and the drive ring 405 drives the first sliding pipe 404 to move. In this way, the first extension pipe 701 and the second extension pipe 703 can not only rotate but also flip, and can further expand the air suction range on this basis;Moreover, the movement of the first sliding tube 404 drives the movement of the first gear 606. The movement of the first gear 606 causes rotation due to the action of the driving rack 604. The rotation of the first gear 606 drives the rotation of the first rotating shaft 603. The first rotating shaft 603 drives the rotation of the second rotating shaft 607 through the third pulley 602, the fourth pulley 609, and the second drive belt 601. The second rotating shaft 607 drives the rotation of the cam 608. The cam 608 presses the pressure plate 613, causing the pressure plate 613 to compress and release the hose 702. The compression energy of the hose 702 increases the gas inhalation volume and expands the detection range of gas leakage.

[0046] The embodiments of the present invention have been described above. However, these embodiments are not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A sound and light alarm, comprising a housing (1) in which the sound and light alarm is fixedly mounted, characterized in that: The bottom of the shell (1) is fixedly connected to a fixed driving mechanism, the fixed driving mechanism comprising a positioning tube (301), the positioning tube (301) being rotatably connected to a flip extension mechanism, the flip extension mechanism being fixedly mounted with an air suction mechanism, the air suction mechanism comprising a first extension tube (701), the first extension tube (701) being internally slidably connected to a plurality of second extension tubes (703) which shrink in sequence, the flip extension mechanism driving the air suction mechanism to continuously expand and merge so as to absorb gas at different positions and capable of switching the suction angle; The bottom of the second extension tube (703) is fixedly connected with an air suction nozzle, and the air suction nozzle changes shape as the first extension tube (701) and the second extension tube (703) are unfolded and combined, switching between a trumpet-shaped shape and a round-shaped shape; The top of the first extension tube (701) is fixedly connected to a positioning plate (612), the positioning plate (612) is slidably connected to a sliding rod (611), the sliding rod (611) is fixedly connected to a pressing plate (613), a first spring (610) is sleeved on the sliding rod (611), the two ends of the first spring (610) are respectively connected to the positioning plate (612) and the pressing plate (613), a hose (702) is provided between the positioning plate (612) and the pressing plate (613), and the hose (702) is fixedly connected to and communicates with the first extension tube (701); The flip extension mechanism comprises an extension component and a rotating tube (402), the rotating tube (402) being rotatably connected to the positioning tube (301), a toggle component being rotatably mounted inside the rotating tube (402), an air supply pipe (406) being rotatably mounted through the rotating tube (402), a mounting plate (409) being fixedly connected to the air supply pipe (406), two driving columns (408) being fixedly connected to the mounting plate (409), and a sliding component being fixedly connected to the driving column (408).

2. The sound and light alarm according to claim 1, characterized in that: The positioning tube (301) is fixedly connected to the housing (1); a plurality of fixing frames (305) are fixedly connected to the inner wall of the inner cavity of the positioning tube (301); a motor cover (304) is fixedly connected to the interior of the plurality of fixing frames (305); a dual-axis motor (303) is fixedly installed inside the motor cover (304); a fan blade (302) is fixedly connected to the top power output shaft of the dual-axis motor (303); and a drive shaft (306) is fixedly connected to the bottom power output shaft of the dual-axis motor (303); The rotating tube (402) is fixedly connected to the driving shaft (306); The toggle assembly is fixedly connected to the fixing frame (305).

3. The sound and light alarm according to claim 2, characterized in that: The toggle assembly comprises a sealing ring (410), the sealing ring (410) being rotatably connected to a rotating tube (402), the sealing ring (410) being fixedly connected to a fixing frame (305), the sealing ring (410) being fixedly connected to a first fixing tube (403), the first fixing tube (403) being provided with a plurality of driving grooves (411), a second fixing tube (413) being arranged inside the first fixing tube (403), the second fixing tube (413) being fixedly connected to the sealing ring (410), and a limiting plate (412) being fixedly connected to the second fixing tube (413).

4. The sound and light alarm according to claim 3, characterized in that: The sliding assembly comprises a second sliding tube (407), the second sliding tube (407) being slidably connected to the first sliding tube (404), and the first sliding tube (404) being fixedly connected to the first extension tube (701).

5. The sound and light alarm according to claim 4, characterized in that: The extension assembly comprises a mounting cover (401), wherein the mounting cover (401) is fixedly connected to a rotating tube (402), a reciprocating screw rod (501) is arranged inside the rotating tube (402), the reciprocating screw rod (501) is rotatably connected to the rotating tube (402), a first belt pulley (505) is fixedly connected to the reciprocating screw rod (501), a second belt pulley (506) is fixedly connected to the air delivery pipe (406), the first belt pulley (505) and the second belt pulley (506) are connected via a first driving belt (504), a threaded drive frame (502) is threadedly connected to the reciprocating screw rod (501), the threaded drive frame (502) is slidably connected to the mounting cover (401), an extension plate (503) is fixedly connected to the top of the threaded drive frame (502), a drive ring (405) is arranged between the two extension plates (503), and the drive ring (405) is fixedly connected to the first sliding tube (404).

6. The sound and light alarm according to claim 1, characterized in that: A limiting ring (801) is fixedly connected to the second extension tube (703), and the air suction nozzle includes a counterweight ring (804), and the counterweight ring (804) is fixedly connected to the second extension tube (703). A plurality of mounting grooves are provided on the second extension tube (703), and a third rotating shaft (803) is fixedly connected inside the mounting groove. A rotating plate (805) is rotatably connected to the third rotating shaft (803), and a torsion spring is sleeved on the third rotating shaft (803), and two ends of the torsion spring are respectively connected to the rotating plate (805) and the counterweight ring (804), and a folding soft sleeve (802) is fixedly connected to the bottom of the counterweight ring (804), and the folding soft sleeve (802) is fixedly connected to the rotating plate (805).

7. The sound and light alarm according to claim 4, characterized in that: The top of the second sliding tube (407) is fixedly connected to a connecting block (605), the top of the connecting block (605) is fixedly connected to a driving gear rack (604), the driving gear rack (604) is meshed with a first gear (606), the first gear (606) is fixedly connected to a first rotating shaft (603), the first rotating shaft (603) is rotatably connected to the first sliding tube (404), the first rotating shaft (603) is fixedly connected to a third pulley (602), the first sliding tube (404) is rotatably mounted with a second rotating shaft (607), the second rotating shaft (607) is fixedly connected to a fourth pulley (609), the third pulley (602) and the fourth pulley (609) are connected via a second driving belt (601), and the second rotating shaft (607) is fixedly connected to a cam (608).

8. The sound and light alarm according to claim 1, characterized in that: A threaded cover (2) is provided below the housing (1), and the threaded cover (2) is threadably connected to the housing (1).

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