A gas alarm detection device and a method of using the same

Abstract

The present invention relates to the field of gas alarm detection technology, specifically to a gas alarm detection device and a method for using the same, including a gas detector body, wherein a fixed gas pipe is provided at the bottom probe of the gas detector body. The gas alarm detection device and the method for using the same, through the repulsion magnetic block on the upper side of the rotating column is converted to align with the triangular block, and the repulsion force is provided along the upper magnetic sheet to push down, at which time the sliding air pipe moves downward, and the surface of the rotating column is converted to the displacement of the upper repulsion magnetic block and the alignment of the lower repulsion magnetic block, so that the sliding air pipe moves upward. Compared with the existing use of an electric push rod to push the pipeline to move, the above-mentioned motor is not physically connected to the sliding air pipe, but uses magnetic changes to realize the movement control of the sliding air pipe. When there is an object blocking the lower side of the sliding air pipe, the magnetic connection will not react the stop of the sliding air pipe to the driving structure, which can avoid the sliding air pipe that continues to move downward from reversely squeezing the gas detector body, thereby ensuring the stability of the equipment installation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas alarm detection, and in particular to a gas alarm detection device and a use method thereof. Background Art

[0002] The gas alarm detection system is a safety device used to monitor the concentration of toxic, harmful, flammable and explosive gases in the working environment. It plays a vital role in the field of industrial safety. In industrial environments, especially in the petrochemical, mining, construction and other industries, it is often necessary to deal with various potentially dangerous gases. The leakage or accumulation of these gases may lead to serious safety accidents, such as explosions, fires and even poisoning of personnel. Therefore, real-time monitoring of the concentration of these gases is crucial to ensure the safety of the workplace.

[0003] In the prior art, since there are many types of harmful gases, such as carbon monoxide, hydrogen sulfide, methane and chlorine, among which harmful gases such as hydrogen sulfide are heavier than air, heavier harmful gases such as hydrogen sulfide may be deposited near the ground. When the heavier harmful gases float with the wind or air, they may gradually become thinner or dissipate, which may affect the detection effect of the harmful gases.

[0004] The existing patent (publication number: CN118430199B) discloses a gas alarm detection device, and the key points of its technical solution are: it includes a gas alarm detector, the bottom surface of the gas alarm detector is provided with an operating tube, and the outer circular wall surface of the operating tube is fixedly installed with a mounting shell; the bottom surface of the gas alarm detector is provided with a dustproof mechanism for blocking dust at the air inlet position of the gas alarm detector; through the arrangement of the gas alarm detector, operating tube, mounting shell, adjusting tube, connecting column, connecting hole, movable hole, bearing, rotating column, ratchet, transmission column, rotating column, rotating hole, rotating hole, mounting column, sliding block, mounting frame, micro electric push rod, moving column, pushing column, sliding hole, fixed column and spring sheet, the adjusting tube can be moved out of the interior of the operating tube to lower its position, and through the superimposed length of the operating tube and the adjusting tube, it is convenient to detect harmful gases gathered at a lower position relative to the gas alarm detector. The above-mentioned prior art utilizes the downward-moving tube body to detect the sinking gas, but the sinking gas will not actively rise to contact the detector, so it is difficult to achieve the effect of auxiliary detection. In addition, when an obstruction occurs on the lower side of the telescopic tube body, the telescopic tube body will also generate a reverse thrust on the detector, affecting the stability of the equipment installation.

[0005] In view of this, we propose a gas alarm detection device and a method of using the same. Summary of the invention

[0006] The object of the present invention is to provide a gas alarm detection device and a method of using the same, so as to solve the problem proposed in the above background technology that the prior art uses a downward-moving tube body to detect sinking gas, but the sinking gas will not actively rise to contact the detector, so it is difficult to achieve the effect of auxiliary detection, and when an obstruction occurs on the lower side of the telescopic tube body, the telescopic tube body will also generate a reverse thrust on the detector, affecting the stability of the equipment installation.

[0007] In view of this, we propose a gas alarm detection device and a method for using the same. To achieve the above purpose, the present invention provides the following technical solution: a gas alarm detection device, comprising a gas detector body, a fixed gas pipe is arranged at the bottom probe of the gas detector body, and a retractable sliding gas pipe is arranged inside the fixed gas pipe, and a magnetic pusher is arranged on the sliding gas pipe and the fixed gas pipe.

[0008] The magnetic thruster includes a convex shell fixedly arranged on the side surface of the sliding air pipe, and a motor is installed in the convex shell, a gear is fixedly installed on the rotating shaft of the motor, an annular groove connected to the convex shell is opened on the inner wall of the fixed air pipe, and a gear ring is rotatably connected in the annular groove, and the gear ring is meshed with the gear.

[0009] Two column holes are arranged in the wall of the fixed air pipe, and the two column holes are symmetrically distributed along the fixed air pipe. A rotating column is rotatably connected in the column hole, and a tooth surface meshing with the gear ring is arranged at the top of the rotating column.

[0010] Two repulsive magnetic blocks are respectively embedded on the surface of the spin column, and the two repulsive magnetic blocks are respectively arranged at the upper and lower ends of the spin column, and the two repulsive magnetic blocks are distributed in opposite directions along the spin column.

[0011] A triangular block is fixedly arranged on the side surface of the sliding air pipe, and force-bearing magnetic sheets matching with the repulsive magnetic blocks are fixedly arranged on the two oblique sides of the triangular block.

[0012] The repulsive magnetic block, the rotating column and the column hole are provided with an anti-blocking component.

[0013] Preferably, the anti-blocking component includes an embedding groove opened on the side surface of the rotating column, and the repulsive magnetic block on the upper side is slidably arranged in the embedding groove.

[0014] An inner hole is provided inside the rotating column, and two conductive columns connected to the circuit of the buzzer are fixedly arranged at the bottom of the column hole, and the conductive columns are located in the inner hole.

[0015] A through opening connected to the inner hole is provided in the embedding groove, and a U-shaped gate corresponding to the two poles is fixedly arranged on the inner side of the surface of the upper repulsive magnetic block, and the U-shaped gate extends through the through opening to the inner hole.

[0016] A spring is arranged between the U-shaped gate and the embedding groove, and the spring pushes the U-shaped gate to move in a direction away from the pole.

[0017] An active air suction component is arranged between the sliding air pipe and the fixed air pipe.

[0018] Preferably, the active air suction component includes a horizontal axis rotatably connected to the inside of the sliding air tube, and both ends of the horizontal axis pass through the sliding air tube and extend into the fixed air tube. Two vertical grooves are provided on the inner wall of the fixed air tube, which respectively match the two ends of the horizontal axis, and a plurality of groups of rubber strips for friction rotation of the horizontal axis are fixedly arranged on the inner side walls of the vertical grooves. A single group of the rubber strips is provided with two, and the two rubber strips are distributed on both sides of the vertical grooves in an oppositely staggered manner.

[0019] A movable plate is slidably arranged in the sliding air pipe, and a bracket of a U-shaped structure is fixedly arranged at the bottom of the movable plate, and a cam matched with the bracket is fixedly installed on the horizontal axis.

[0020] A fixed plate is fixedly installed inside the sliding air pipe, and the fixed plate is located on the upper side of the movable plate. Air holes are opened on the surfaces of the fixed plate and the movable plate, and the two groups of air holes are staggered and distributed.

[0021] Preferably, the fixed air pipe is configured as a two-section funnel-shaped structure with a larger upper portion and a smaller lower portion.

[0022] Preferably, the top end of the fixed air pipe is screwed onto the bottom probe of the gas detector via threads.

[0023] Preferably, the U-shaped gate is fixed to the upper repulsive magnetic block by screws.

[0024] Preferably, a sliding groove is provided on the inner side wall of the sliding air pipe, and the movable plate is slidably connected along the sliding groove through a bracket.

[0025] A method for using a gas alarm detection device comprises the following steps:

[0026] S1. When the gas detector is powered on, the probe at the bottom monitors the external air through the fixed air pipe and the sliding air pipe, and alarms the user when dangerous gas leaks;

[0027] S2, the motor is started at a fixed time to make the gear drive the gear ring to rotate. At this time, the gear ring drives the rotating column to rotate 180° along the tooth surface, so that the repulsive magnetic block on the lower side of the rotating column leaves the triangular block, and the upward thrust provided by the lower magnetic sheet is released. The repulsive magnetic block on the upper side of the rotating column is converted to align with the triangular block, and the repulsive force is provided along the upper magnetic sheet to push down. At this time, the sliding air pipe moves downward. After the sliding air pipe moves down to the bottom, the rotating column continues to rotate 180° to reset. The surface of the rotating column is converted to the upper repulsive magnetic block displacement and the lower repulsive magnetic block alignment, so that the sliding air pipe moves upward;

[0028] S3. When there is an object blocking the lower side of the sliding air pipe and the sliding air pipe cannot move downward, the upper magnetic sheet that stops moving applies a reverse thrust to the upper repulsion block in the opposite direction, and pushes the upper repulsion block to shrink along the embedded groove, so that the U-shaped gate contacts the two poles. At this time, the circuit of the buzzer is connected through the pole and the U-shaped gate, and a prompt sound is emitted;

[0029] S4. When the sliding air pipe moves downward along the fixed air pipe, the two ends of the horizontal axis move downward synchronously in the vertical groove, and at this time the movable plate and the fixed plate fit together to close the sliding air pipe, so that negative pressure is generated in the fixed air pipe through the movement of the sliding air pipe, until the end of the horizontal axis contacts the rubber strip and is rotated. During this process, the cam on the horizontal axis pushes the bracket and the movable plate to move downward by rotation, and the movable plate separates from the fixed plate to open the sliding air pipe. The fixed air pipe uses negative pressure to suck the air from the opening of the sliding air pipe for detection. During this process, the rubber strips on both sides of the vertical groove alternately control the closing and opening of the sliding air pipe to suck air at different heights.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] In the present invention, the repulsive magnetic block on the upper side of the rotary column is converted to align with the triangular block, and repulsive force is provided along the upper magnetic sheet to push downward. At this time, the sliding air pipe moves downward. After the sliding air pipe moves down to the bottom, the rotary column continues to rotate 180° to reset, and the surface of the rotary column is converted to shift the upper repulsive magnetic block and align the lower repulsive magnetic block, so that the sliding air pipe moves upward. Compared with the existing use of an electric push rod to push the pipeline to move, the above-mentioned motor is not physically connected to the sliding air pipe, but instead uses magnetic changes to achieve movement control of the sliding air pipe. On the one hand, it can prevent the vibration generated by the operation of the physical structure from affecting the operation of the probe. On the other hand, when there is an object blocking the lower side of the sliding air pipe, the magnetic connection will not react the stop of the sliding air pipe to the driving structure, which can prevent the sliding air pipe that continues to move downward from reversely squeezing the gas detector body, thereby ensuring the stability of the equipment installation.

[0032] In the present invention, the upper magnetic sheet that stops moving applies a reverse thrust to the upper repulsion block in the opposite direction, and pushes the upper repulsion block to retract along the embedded groove, so that the U-shaped gate contacts the two poles. At this time, the circuit of the buzzer is connected via the poles and the U-shaped gate, and a prompt sound is emitted. Compared with the existing single tube telescopic structure, the repulsion block and the magnetic sheet can cooperate to realize the function of movement control, and can also use magnetic force to reversely start the warning process when the sliding air pipe fails to telescope, thereby actively prompting the user to clear the operation obstacles of the sliding air pipe in time, thereby ensuring the operation stability of the detection equipment in complex environments.

[0033] In the present invention, the sliding air pipe is closed by fitting the movable plate and the fixed plate together, so that negative pressure is generated in the fixed air pipe through the movement of the sliding air pipe until the end of the horizontal axis contacts the rubber strip and is rotated. During this process, the cam on the horizontal axis pushes the bracket and the movable plate to move downward by rotation, and the movable plate is separated from the fixed plate to open the sliding air pipe. The fixed air pipe uses the negative pressure to suck the air at the pipe opening of the sliding air pipe for detection. During this process, the rubber strips on both sides of the vertical groove alternately control the closing and opening of the sliding air pipe to suck air at different heights. Compared with the existing straight-through pipe body structure, the cooperation of the above-mentioned movable plate and the fixed plate can realize the automatic opening and closing of the sliding air pipe, and cooperate with the downward movement of the sliding air pipe to actively inhale external air. On the one hand, it can avoid the situation where dangerous gases sinking from the outside will not actively rise to achieve detection. On the other hand, it can accelerate the efficiency of the gas detector body contacting the outside air. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 The three-dimensional structure of the trachea fixed in the present invention is shown in FIG. Figure 1 ;

[0036] Figure 3 The three-dimensional structure of the trachea fixed in the present invention is shown in FIG. Figure 2 ;

[0037] Figure 4 A partial cross-sectional view of a fixed trachea according to the present invention;

[0038] Figure 5 It is a structural schematic diagram of the fixed plate, the movable plate and the cam of the present invention;

[0039] Figure 6 It is a three-dimensional structural cross-sectional view of the triangular block and the sliding air tube of the present invention;

[0040] Figure 7 An exploded view of the fixed trachea and the sliding trachea of ​​the present invention;

[0041] Figure 8 For the present invention Figure 7 The enlarged view of point A in the middle;

[0042] Fig. 9 For the present invention Figure 7 The enlarged view of point B in the middle;

[0043] Fig.10 An exploded view of the rotary column and the repulsive block of the present invention;

[0044] Fig.11 For the present invention Fig.10 Enlarged view of point C in the middle.

[0045] In the figure: 1. gas detector body; 2. fixed air pipe; 3. sliding air pipe; 4. magnetic pusher; 41. convex shell; 42. motor; 43. gear; 44. ring groove; 45. gear ring; 46. column hole; 47. rotary column; 48. tooth surface; 49. repulsive magnetic block; 410. triangular block; 411. force-bearing magnetic sheet; 412. anti-blocking component; 4121. embedded groove; 4122. inner hole; 4123. conductive column; 4124. through port; 4125. U-shaped gate; 4126. spring; 4127. active suction component; 41271. horizontal axis; 41272. vertical groove; 41273. rubber strip; 41274. movable plate; 41275. bracket; 41276. cam; 41277. fixed plate; 41278. air hole. DETAILED DESCRIPTION

[0046] 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 technical staff in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figures 1 to 11 The present invention provides a technical solution: a gas alarm detection device, including a gas detector body 1, a fixed air pipe 2 is arranged at the bottom probe of the gas detector body 1, and a retractable sliding air pipe 3 is arranged inside the fixed air pipe 2. When the gas detector body 1 is powered on, the probe at the bottom monitors the external air through the fixed air pipe 2 and the sliding air pipe 3, and alarms the user when dangerous gas leaks. Magnetic thrusters 4 are arranged on the sliding air pipe 3 and the fixed air pipe 2.

[0048] The magnetic thruster 4 includes a convex shell 41 fixedly arranged on the side surface of the sliding air pipe 3, and a motor 42 is installed in the convex shell 41, a gear 43 is fixedly installed on the rotating shaft of the motor 42, an annular groove 44 connected to the convex shell 41 is opened on the inner wall of the fixed air pipe 2, and a gear ring 45 is rotatably connected in the annular groove 44, and the gear ring 45 is meshed with the gear 43. The motor 42 is started at a fixed time so that the gear 43 drives the gear ring 45 to rotate.

[0049] Two column holes 46 are provided in the wall of the fixed air pipe 2 and are symmetrically distributed along the fixed air pipe 2 . A rotating column 47 is rotatably connected in the column hole 46 , and a tooth surface 48 meshing with the tooth ring 45 is provided at the top of the rotating column 47 .

[0050] Two repulsive magnetic blocks 49 are respectively embedded on the surface of the rotating column 47 . The two repulsive magnetic blocks 49 are respectively arranged at the upper and lower ends of the rotating column 47 , and the two repulsive magnetic blocks 49 are distributed in opposite directions along the rotating column 47 .

[0051] A triangular block 410 is fixedly provided on the side surface of the sliding air pipe 3, and force-bearing magnetic sheets 411 cooperating with the repulsive magnetic block 49 are fixedly provided on the two oblique sides of the triangular block 410. The gear ring 45 drives the rotary column 47 to rotate 180° along the tooth surface 48, so that the repulsive magnetic block 49 on the lower side of the rotary column 47 leaves the triangular block 410, and the upward thrust provided along the lower magnetic sheet is released. The repulsive magnetic block 49 on the upper side of the rotary column 47 is converted to align with the triangular block 410, and repulsive force is provided along the upper magnetic sheet to push downward. At this time, the sliding air pipe 3 moves downward. After the sliding air pipe 3 moves down to the bottom, the rotary column 47 continues to rotate 180° to reset, and the surface of the rotary column 47 is converted to shift the upper repulsive magnetic block 49 and align the lower repulsive magnetic block 49, so that the sliding air pipe 3 moves upward.

[0052] An anti-blocking component 412 is disposed between the repulsive magnetic block 49 , the rotating column 47 , and the column hole 46 .

[0053] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the anti-blocking component 412 includes a groove 4121 opened on the side surface of the rotating column 47, and the upper repulsion magnetic block 49 is slidably set in the groove 4121. When the sliding air pipe 3 cannot move downward, the upper magnetic piece that stops moving applies a reverse thrust to the upper repulsion block in the reverse direction and pushes the upper repulsion block to retract along the groove 4121.

[0054] An inner hole 4122 is formed inside the rotating post 47 . Two conductive posts 4123 connected to the circuit of the buzzer are fixedly disposed at the bottom of the post hole 46 , and the conductive posts 4123 are located in the inner hole 4122 .

[0055] A through opening 4124 communicating with the inner hole 4122 is defined in the embedding groove 4121 , and a U-shaped gate 4125 corresponding to the two poles is fixedly disposed on the inner side of the surface of the upper repulsive magnetic block 49 , and the U-shaped gate 4125 extends through the through opening 4124 to the inner hole 4122 .

[0056] A spring 4126 is provided between the U-shaped gate 4125 and the embedding groove 4121, and the spring 4126 pushes the U-shaped gate 4125 to move away from the pole. The upper repulsion block retracts along the embedding groove 4121 to make the U-shaped gate 4125 contact the two poles. At this time, the circuit of the buzzer is connected through the pole and the U-shaped gate 4125, and a prompt sound is emitted.

[0057] An active air suction component 4127 is provided between the sliding air tube 3 and the fixed air tube 2 .

[0058] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the active air suction component 4127 includes a horizontal axis 41271 rotatably connected to the inside of the sliding air tube 3, and both ends of the horizontal axis 41271 penetrate the sliding air tube 3 and extend into the fixed air tube 2. Two vertical grooves 41272 are provided on the inner wall of the fixed air tube 2 and respectively cooperate with the two ends of the horizontal axis 41271. When the sliding air tube 3 moves downward along the fixed air tube 2, the two ends of the horizontal axis 41271 move downward synchronously in the vertical groove 41272, and a plurality of groups of rubber strips 41273 that rub against the rotation of the horizontal axis 41271 are fixedly arranged on the inner side wall of the vertical groove 41272. A single group of rubber strips 41273 is set to two, and the two rubber strips 41273 are distributed on both sides of the vertical groove 41272 in opposite directions.

[0059] A movable plate 41274 is slidably disposed in the sliding air pipe 3 , and a U-shaped bracket 41275 is fixedly disposed at the bottom of the movable plate 41274 , and a cam 41276 matching the bracket 41275 is fixedly installed on the transverse shaft 41271 .

[0060] A fixed plate 41277 is fixedly installed inside the sliding air tube 3, and the fixed plate 41277 is located on the upper side of the movable plate 41274. Air holes 41278 are provided on the surfaces of the fixed plate 41277 and the movable plate 41274, and the two groups of air holes 41278 are staggered with each other. The movable plate 41274 and the fixed plate 41277 fit together to close the sliding air tube 3, so that negative pressure is generated in the fixed air tube 2 through the movement of the sliding air tube 3. During the process of the end of the horizontal axis 41271 being in contact with the rubber strip 41273 and being rotated, the cam 41276 on the horizontal axis 41271 pushes the bracket 41275 and the movable plate 41274 downward by rotation, and the movable plate 41274 is separated from the fixed plate 41277 to open the sliding air tube 3, and the fixed air tube 2 uses the negative pressure to suck the air at the pipe mouth of the sliding air tube 3.

[0061] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the fixed air pipe 2 is configured as a two-section funnel-shaped structure with a larger upper portion and a smaller lower portion. This structure allows the small-diameter tube body to quickly draw in external air, and then diffuse the air into the large-diameter tube body for detection by the probe.

[0062] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the top end of the fixed air pipe 2 is screwed onto the bottom probe of the gas detector through a thread. The threaded structure enables the fixed air pipe 2 to be quickly disassembled and assembled along the gas detector body 1, thereby improving the convenience of installation and use.

[0063] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the U-shaped gate 4125 and the upper repulsive magnetic block 49 are fixedly installed by screws. After removing the screws, the U-shaped gate 4125 and the corresponding repulsive magnetic block 49 can be separated to facilitate maintenance and repair by the user.

[0064] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, a sliding groove is opened on the inner wall of the sliding air pipe 3, and the movable plate 41274 is slidably connected along the sliding groove through the bracket 41275. The bracket 41275 performs limited displacement along the sliding groove, so that the opening distance between the movable plate 41274 and the fixed plate 41277 is fixed, thereby ensuring the stability of air flow.

[0065] A method for using a gas alarm detection device comprises the following steps:

[0066] S1. When the gas detector body 1 is powered on, the probe at the bottom monitors the external air through the fixed air pipe 2 and the sliding air pipe 3, and alarms the user when dangerous gas leakage occurs.

[0067] S2, the motor 42 is started at a fixed time so that the gear 43 drives the gear ring 45 to rotate. At this time, the gear ring 45 drives the rotary column 47 to rotate 180° along the tooth surface 48, so that the repulsive magnetic block 49 on the lower side of the rotary column 47 leaves the triangular block 410, and the upward thrust provided by the lower magnetic sheet is released. The repulsive magnetic block 49 on the upper side of the rotary column 47 is converted to align with the triangular block 410, and the repulsive force is provided along the upper magnetic sheet to push down. At this time, the sliding air pipe 3 moves downward. After the sliding air pipe 3 moves down to the bottom, the rotary column 47 continues to rotate 180° to reset. The surface of the rotary column 47 is converted to shift the upper repulsive magnetic block 49 and align the lower repulsive magnetic block 49, so that the sliding air pipe 3 moves upward.

[0068] S3. When there is an object blocking the lower side of the sliding air tube 3 and the sliding air tube 3 cannot move downward, the upper magnetic sheet that stops moving applies a reverse thrust to the upper repulsion block in the opposite direction, and pushes the upper repulsion block to retract along the embedded groove 4121, so that the U-shaped gate 4125 contacts the two poles. At this time, the circuit of the buzzer is connected via the pole and the U-shaped gate 4125, and a prompt sound is emitted.

[0069] S4. When the sliding air pipe 3 moves downward along the fixed air pipe 2, the two ends of the horizontal axis 41271 move downward synchronously in the vertical groove 41272, and at this time, the movable plate 41274 and the fixed plate 41277 fit together to close the sliding air pipe 3, so that negative pressure is generated in the fixed air pipe 2 through the movement of the sliding air pipe 3, until the end of the horizontal axis 41271 contacts the rubber strip 41273 and is rotated. During this process, the cam 41276 on the horizontal axis 41271 pushes the bracket 41275 and the movable plate 41274 to move downward by rotation, and the movable plate 41274 separates from the fixed plate 41277 to open the sliding air pipe 3. The fixed air pipe 2 uses the negative pressure to suck the air at the pipe opening of the sliding air pipe 3 for detection. During this process, the rubber strips 41273 on both sides of the vertical groove 41272 alternately control the closing and opening of the sliding air pipe 3, so as to suck air at different heights.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gas alarm detection device, comprising a gas detector body (1), characterized in that: A fixed air pipe (2) is arranged at the bottom probe of the gas detector body (1), and a retractable sliding air pipe (3) is arranged inside the fixed air pipe (2), and magnetic pushers (4) are arranged on the sliding air pipe (3) and the fixed air pipe (2); The magnetic thruster (4) comprises a convex shell (41) fixedly arranged on the side surface of the sliding air pipe (3), and a motor (42) is installed in the convex shell (41), a gear (43) is fixedly installed on the rotating shaft of the motor (42), an annular groove (44) connected to the convex shell (41) is opened on the inner wall of the fixed air pipe (2), and a gear ring (45) is rotatably connected in the annular groove (44), and the gear ring (45) is meshed with the gear (43); Two column holes (46) are provided in the wall of the fixed air pipe (2), and the two column holes (46) are symmetrically distributed along the fixed air pipe (2); a rotating column (47) is rotatably connected in the column hole (46), and a tooth surface (48) meshing with the toothed ring (45) is provided at the top of the rotating column (47); Two repulsive magnetic blocks (49) are respectively embedded on the surface of the spin column (47), the two repulsive magnetic blocks (49) are respectively arranged at the upper and lower ends of the spin column (47), and the two repulsive magnetic blocks (49) are distributed in opposite directions along the spin column (47); A triangular block (410) is fixedly provided on the side surface of the sliding air pipe (3), and force-bearing magnetic sheets (411) that match the repulsive magnetic block (49) are fixedly provided on both oblique sides of the triangular block (410); The repulsive magnetic block (49), the rotating column (47), and the column hole (46) are provided with an anti-blocking component (412); The anti-blocking component (412) comprises an embedding groove (4121) formed on the side surface of the rotating column (47), and the repulsive magnetic block (49) on the upper side is slidably disposed in the embedding groove (4121); An inner hole (4122) is provided inside the rotating column (47); two conductive columns (4123) connected to the circuit of the buzzer are fixedly arranged at the bottom of the column hole (46), and the conductive columns (4123) are located in the inner hole (4122); A through opening (4124) communicating with the inner hole (4122) is provided in the embedding groove (4121); a U-shaped gate (4125) corresponding to the two poles is fixedly provided on the inner side of the surface of the upper repulsive magnetic block (49); and the U-shaped gate (4125) passes through the through opening (4124) and extends into the inner hole (4122); A spring (4126) is provided between the U-shaped gate (4125) and the embedding groove (4121), and the spring (4126) pushes the U-shaped gate (4125) to move in a direction away from the pole; An active air suction component (4127) is provided between the sliding air pipe (3) and the fixed air pipe (2).

2. A gas alarm detection device according to claim 1, characterized in that: The active air suction component (4127) comprises a transverse axis (41271) rotatably connected to the inside of the sliding air tube (3), and both ends of the transverse axis (41271) penetrate the sliding air tube (3) and extend into the fixed air tube (2), and two vertical grooves (41272) are provided on the inner wall of the fixed air tube (2) and respectively match the two ends of the transverse axis (41271), and a plurality of groups of rubber strips (41273) that rub against the rotation of the transverse axis (41271) are fixedly arranged on the inner side wall of the vertical groove (41272), and a single group of the rubber strips (41273) is provided with two, and the two rubber strips (41273) are distributed on both sides of the vertical groove (41272) in an oppositely offset manner; A movable plate (41274) is slidably disposed in the sliding air pipe (3), and a bracket (41275) of a U-shaped structure is fixedly disposed at the bottom of the movable plate (41274), and a cam (41276) matching the bracket (41275) is fixedly mounted on the transverse axis (41271); A fixed plate (41277) is fixedly installed inside the sliding air pipe (3), and the fixed plate (41277) is located on the upper side of the movable plate (41274). Air holes (41278) are provided on the surfaces of the fixed plate (41277) and the movable plate (41274), and the two groups of air holes (41278) are distributed in a mutually staggered manner.

3. A gas alarm detection device according to claim 1, characterized in that: The fixed air pipe (2) is configured as a two-section funnel-shaped structure with a larger upper portion and a smaller lower portion.

4. A gas alarm detection device according to claim 3, characterized in that: The top end of the fixed gas pipe (2) is screwed onto the bottom probe of the gas detector via a thread.

5. A gas alarm detection device according to claim 1, characterized in that: The U-shaped gate (4125) and the upper repulsive magnetic block (49) are fixedly mounted by means of screws.

6. A gas alarm detection device according to claim 2, characterized in that: A sliding groove is provided on the inner side wall of the sliding air pipe (3), and the movable plate (41274) is slidably connected along the sliding groove via a bracket (41275).

7. A method for using a gas alarm detection device, using the gas alarm detection device according to claim 6, characterized in that: The steps include: S1. When the gas detector body (1) is powered on, the probe at the bottom thereof monitors the external air through the fixed gas pipe (2) and the sliding gas pipe (3), and alarms the user when a dangerous gas leak occurs; S2, the motor (42) is started at a fixed time so that the gear (43) drives the gear ring (45) to rotate. At this time, the gear ring (45) drives the rotating column (47) to rotate 180 degrees along the tooth surface (48), so that the repulsive magnetic block (49) on the lower side of the rotating column (47) leaves the triangular block (410), and the upward thrust provided by the lower magnetic sheet is released. The repulsive magnetic block (49) on the upper side of the rotating column (47) is converted to be aligned with the triangular block (410), and the repulsive force is provided along the upper magnetic sheet to push downward. At this time, the sliding air pipe (3) moves downward. After the sliding air pipe (3) moves down to the bottom, the rotating column (47) continues to rotate 180 degrees to reset. The surface of the rotating column (47) is converted to the upper repulsive magnetic block (49) displacement and the lower repulsive magnetic block (49) alignment, so that the sliding air pipe (3) moves upward; S3, when the sliding air tube (3) is blocked by an object on the lower side so that the sliding air tube (3) cannot move downward, the upper magnetic sheet that has stopped moving exerts a reverse thrust on the upper repulsion block in the opposite direction, and pushes the upper repulsion block to retract along the embedded groove (4121), so that the U-shaped gate (4125) contacts the two poles. At this time, the circuit of the buzzer is connected via the pole and the U-shaped gate (4125), and a prompt sound is emitted; S4. When the sliding air tube (3) moves downward along the fixed air tube (2), the two ends of the horizontal axis (41271) move downward synchronously in the vertical groove (41272), and at this time, the movable plate (41274) and the fixed plate (41277) fit and seal the sliding air tube (3), so that negative pressure is generated in the fixed air tube (2) by the movement of the sliding air tube (3), until the end of the horizontal axis (41271) contacts the rubber strip (41273) and is rotated. In this process, the horizontal axis (41271) is moved upward. The cam (41276) rotates to push the bracket (41275) and the movable plate (41274) downward, and the movable plate (41274) separates from the fixed plate (41277) to open the sliding air pipe (3). The fixed air pipe (2) uses negative pressure to suck air from the opening of the sliding air pipe (3) for detection. During this process, the rubber strips (41273) on both sides of the vertical groove (41272) alternately control the closing and opening of the sliding air pipe (3) to suck air at different heights.

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