Smoke detection early warning device

Abstract

The invention relates to the related technical field of fire early warning, discloses a smoke detection early warning device, and aims to solve the problem that a smoke detector still needs to be manually disassembled by means of a ladder after detection failure, an infrared light source and a photosensitive receiving unit are arranged on two hinged light barriers, and when a maintainer uses a long rod to eject a fastening ring sleeve, the infrared light source and the photosensitive receiving unit are arranged on the two hinged light barriers; if the photosensitive receiving unit does not receive a light source signal emitted by the infrared light source, the whole device does not have an alarm state, and the two infrared light sources are converted into a horizontal alignment state, so that the whole device is not in an alarm state; therefore, the middle guide rod is limited not to move along the inner side wall of the mounting base, and finally, the smoke detection cylinder is separated from the mounting base under the action of gravity, so that a maintainer is prevented from detaching the high-altitude damaged mounting base, and finally, the effect of autonomously releasing the fixation after the smoke detector fails to be maintained is realized.

Description

Technical Field

[0001] The present application relates to the technical field related to fire warning, and in particular to a smoke detection and warning device. Background Art

[0002] Smoke detectors are highly sensitive devices designed to sense smoke in the environment and sound an alarm immediately to prevent fire accidents. Such devices are widely used in public places, industrial enterprises and other types of buildings, playing a vital role in safety.

[0003] The working principle of smoke detectors is mainly based on the principle of light scattering. Under normal circumstances, a black light shield is set between the infrared light source and the photosensitive receiving unit to ensure that the light emitted by the infrared light source does not directly shine on the photosensitive receiving unit in the absence of smoke, thereby avoiding false alarms. However, once smoke enters the detector, the smoke particles will scatter the infrared light, allowing part of the light to bypass the light shield and shine on the photosensitive receiving unit. When the intensity of the received light exceeds the preset threshold, the detector will immediately trigger an alarm.

[0004] In practical applications, in order to ensure that smoke detectors can continue to work and not be affected by power outages when a fire occurs, they are usually equipped with a backup power supply. However, this also brings some challenges. Since smoke detectors are usually installed in high places such as indoor roofs, they may suffer from power failure or reduced detection performance after not working for a long time.

[0005] At present, the detection method of smoke detectors mainly relies on manually applying smoke to the bottom of the detector for testing. Although this method can initially determine whether the detector is working properly, it has many inconveniences. Once the detector fails, the maintenance personnel need to use tools such as ladders to climb to the roof and disassemble the detector for detailed inspection. This process is not only cumbersome and labor-intensive, but also inefficient. Summary of the invention

[0006] The present application proposes a smoke detection warning device, which has the advantage of automatically releasing the fixation of the smoke detector after failure during maintenance, so as to solve the problem in the above background technology that the smoke detector needs to be manually disassembled with the help of a ladder after failure during detection.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a smoke detection and early warning device, comprising: a mounting base, on the inner side of which is provided with an anti-detachment stopper and a disassembly inclined portion; a smoke detection tube, on the inner side of which is movably mounted an intermediate guide rod, and an anti-detachment top spring is connected between the intermediate guide rod and the smoke detection tube; a drive shaft, fixed to the side of the intermediate guide rod, and on the outer side of the drive shaft is movably mounted a light baffle, on which an infrared light source and a photosensitive receiving unit are connected, and the photosensitive receiving unit and the infrared light source are both regulated by a power supply and a control assembly fastened to the inner side of the smoke detection tube; a filter sleeve, movably mounted on the bottom of the smoke detection tube; a fastening ring sleeve, threadedly connected to the bottom of the smoke detection tube; a motor, fixed to the bottom of the smoke detection tube, and a knocking rod is fastened to the output shaft of the motor.

[0008] Furthermore, there are two light baffles, both of which are rectangular plates, and the tops of the two light baffles are hinged, one end of the light baffle is movably mounted on the driving shaft, and the rotating shaft of the other light baffle is mounted to the inner side of the mounting base.

[0009] Furthermore, an anti-stuck spring is fastened to the end of the knocking rod, and a knocking ball is fixed to the end of the anti-stuck spring.

[0010] Furthermore, a telescopic positioning rod is connected between the mounting base and the smoke detection tube.

[0011] Furthermore, a fan blade located below the motor is fixedly installed on the top of the filter sleeve, a smoke conveying duct is opened on the top of the smoke detection tube, and a smoke exhaust hole is opened on the side of the installation base.

[0012] Furthermore, a resistance-increasing gear ring is arranged at the top of the inner side of the filter sleeve, and a limited-motion gear head is fastened to the middle part of the intermediate guide rod.

[0013] Furthermore, a threaded guide rod is fixedly connected to the end of the intermediate guide rod, and a limited hook claw is movably installed on the threaded guide rod, a limiting bolt is threadedly connected to the threaded guide rod, an oblique angle is provided on the outer side of the bottom of the limiting hook claw, and a locking tooth head is arranged on the inner side of the bottom, the top of the filter sleeve is fastened to a limiting ring sleeve, and a limiting annular tooth row corresponding to the locking tooth head is provided at the bottom of the limiting ring sleeve.

[0014] Furthermore, a reset top rod located above the filter sleeve is movably installed on the top of the inner side of the smoke detection tube, and a reset top spring is connected between the reset top rod and the smoke detection tube.

[0015] The present invention has the following beneficial effects: The present application provides a smoke detection warning device, which is cleverly designed to arrange the infrared light source and the photosensitive receiving unit on two light shielding plates that can be relatively hinged. This design not only optimizes the smoke detection mechanism, but also incorporates a convenient maintenance function. Under normal circumstances, there is a certain angle between the two light shielding plates, which effectively blocks the infrared light source from directly irradiating the photosensitive receiving unit to avoid false alarms.

[0016] When maintenance is required, the maintenance personnel can use a long rod tool to hold up the fastening ring, and apply external force to make the two hinged light shields relatively deflected and in a relatively horizontal state, so that the photosensitive receiving unit is directly opposite to the infrared light source. In this special detection state, if the device works normally, that is, the photosensitive receiving unit can successfully receive the signal from the infrared light source, then the middle guide rod will be pushed by the anti-drop spring and always keep in contact with the inner wall of the mounting base, ensuring that the smoke detector is firmly installed on the base and will not fall off due to misoperation or external force.

[0017] However, if the photosensitive receiving unit fails to receive the signal from the infrared light source, it indicates that the device may be faulty, and the two light shields are in a horizontal alignment state. This change will limit the free movement of the middle guide rod along the inner wall of the mounting base. After losing the support of the middle guide rod, the smoke detection tube will fall smoothly from the mounting base under the action of its own gravity and fall to the ground or an easily accessible location.

[0018] This innovative design greatly simplifies the maintenance process and avoids the need for maintenance personnel to climb to high altitudes to remove damaged mounting bases. Once the smoke detector is judged to be ineffective during the maintenance process, it will automatically release the fixing effect, thereby reducing the difficulty of maintenance, improving work efficiency, and also reducing the safety risks caused by high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0020] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall external three-dimensional structure; Figure 2 It is a schematic diagram of the overall internal cross-sectional structure; Figure 3 It is a plan view of the position arrangement between the middle guide rod and the filter sleeve; Figure 4 It is a schematic diagram of the motor installation location and its three-dimensional structure; Figure 5 It is a schematic diagram of the three-dimensional structure of the filter sleeve; Figure 6 It is a schematic diagram of the three-dimensional structure of the intermediate guide rod.

[0021] In the figure: 1. mounting base; 100. smoke exhaust hole; 101. anti-slip stopper; 102. disassembly inclined portion; 2. smoke detection tube; 200. smoke duct; 3. fastening ring sleeve; 4. telescopic positioning rod; 5. power supply and control assembly; 6. filter sleeve; 600. resistance increasing gear ring; 601. limiting ring sleeve; 7. fan blades; 8. light shield; 9. infrared light source; 900. photosensitive receiving unit; 10. driving shaft; 11. reset push rod; 110. reset push spring; 12. intermediate guide rod; 120. anti-slip spring; 121. limiting bolt; 13. limit hook; 14. limit tooth head; 15. motor; 16. knocking rod; 17. knocking ball; 170. anti-stuck spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0023] See also Figure 1-Figure 3 It can be seen that a mounting hole is reserved at the top of the mounting base 1, and the mounting base 1 can be fastened to the desired position by fasteners such as expansion bolts, generally at the top of the house. The mounting base 1 and the smoke detection tube 2 are connected and fastened in a detachable manner. In order to ensure that the smoke detection tube 2 and the mounting base 1 are easy to install / disassemble, a telescopic positioning rod 4 is connected between the mounting base 1 and the smoke detection tube 2. Since the telescopic positioning rod 4 can be extended / retracted, it can not only ensure that the mounting base 1 and the smoke detection tube 2 can move coaxially, so that the smoke detection tube 2 can be accurately installed in the mounting base 1, but also after the smoke detection tube 2 is removed from the mounting base 1, the telescopic positioning rod 4 can be used to guide the smoke detection tube 2 to prevent it from falling freely.

[0024] from Figure 3 It can be clearly seen that the mounting base 1 is provided with an anti-slipping stopper 101, which is a relatively horizontal plane, and the mounting base 1 is provided with a disassembly inclined portion 102, and the angle between the disassembly inclined portion 102 and the anti-slipping stopper 101 is between 35° and 75°. Figure 3 and Figure 6 It can be seen that the middle guide rod 12 is in a "Z" shape, and an anti-drop spring 120 is connected between the middle guide rod 12 and the smoke detection tube 2. Under the elastic force of the anti-drop spring 120, the middle guide rod 12 always tends to be pushed toward the outer side of the smoke detection tube 2. Figure 3As shown, an inclined surface is provided at the bottom of the mounting base 1. When the mounting base 1 is fastened to the top of the house, the long rod is used to push the smoke detection tube 2, so that the smoke detection tube 2 moves vertically upward under the guidance of the telescopic positioning rod 4. When the intermediate guide rod 12 passes through the inclined surface at the bottom of the mounting base 1, the inclined surface pushes the intermediate guide rod 12 and compresses the anti-detachment spring 120 of the intermediate guide rod 12, and the intermediate guide rod 12 is retracted to the smoke detection tube 2. As the smoke detection tube 2 continues to push upward, the intermediate guide rod 12 moves to above the anti-detachment stopper 101, and the intermediate guide rod 12 is used to stick to the anti-detachment stopper 101, thereby preventing the smoke detection tube 2 from detaching from the mounting base 1, thereby realizing the connection and fixation between the mounting base 1 and the smoke detection tube 2.

[0025] On this basis, combined with Figure 2-Figure 4 It can be clearly seen that the driving shaft 10 is fastened to the side of the middle guide rod 12, and a light shielding plate 8 is movably installed on the outer side of the driving shaft 10. Figure 2 It can be clearly seen that there are two light baffles 8, both of which are rectangular plates, and the tops of the two light baffles 8 are hinged, wherein the end of one light baffle 8 is movably mounted on the driving shaft 10, and the rotating shaft of the other light baffle 8 is mounted to the inner side of the mounting base 1. When the middle guide rod 12 drives the driving shaft 10 to move horizontally, the driving shaft 10 is forced to push / pull the light baffles 8, so that the light baffles 8 are relatively deflected or relatively horizontal. More specifically, one light baffle 8 is connected to an infrared light source 9, and the other light baffle 8 is connected to a photosensitive receiving unit 900. The photosensitive receiving unit 900 and the infrared light source 9 are both regulated by the power supply and control assembly 5 fastened on the inner side of the smoke detection tube 2. When the light baffles 8 are relatively deflected, the photosensitive receiving unit 900 and the infrared light source 9 are blocked by the light baffles 8. Only when smoke passes between the two, the photosensitive receiving unit 900 receives the photoelectric signal emitted by the infrared light source 9 by utilizing the scattering of the smoke, and finally triggers an alarm. At the same time, if the two light baffles 8 are placed horizontally, the infrared light source 9 and the photosensitive receiving unit 900 will be directly opposite to each other, and the photosensitive receiving unit 900 will still receive the signal and send out information.

[0026] In this embodiment, a knock alarm signal is provided. Specifically, Figure 3 and Figure 4It can be seen that a filter sleeve 6 is movably installed at the bottom of the smoke detection tube 2, and a fastening ring sleeve 3 is threadedly connected to the bottom of the smoke detection tube 2. The fastening of the fastening ring sleeve 3 prevents the filter sleeve 6 from detaching from the bottom of the smoke detection tube 2. More specifically, filter holes are provided at the bottom of the filter sleeve 6, so that smoke can enter the smoke detection tube 2 and flow between the infrared light source 9 and the photosensitive receiving unit 900, and finally the smoke can scatter the light emitted by the infrared light source 9, which is convenient for the photosensitive receiving unit 900 to receive. At the same time, the filter sleeve 6 can also filter the dust in the air to prevent large particles of dust from entering between the infrared light source 9 and the photosensitive receiving unit 900 and causing false alarms of the equipment. Figure 4 It can be seen that the bottom of the smoke detection tube 2 is fastened with a motor 15, and the output shaft of the motor 15 is fastened with a knocking rod 16. When the photosensitive receiving unit 900 receives the light source signal, the motor 15 will drive the knocking rod 16 to knock the filter cover 6. In order to prevent the knocking rod 16 from getting stuck during rotation, an anti-stuck spring 170 is fastened to the end of the knocking rod 16, and a knocking ball 17 is fixed to the end of the anti-stuck spring 170. When the knocking rod 16 rotates, the knocking ball 17 is forced to intermittently hit the filter cover 6, thereby making a sound to warn outsiders.

[0027] In actual application, when installing the smoke detection tube 2, the smoke detection tube 2 is fastened to the bottom of the telescopic positioning rod 4, and then the fastening ring 3 is pushed by the long rod to push the smoke detection tube 2 upward along the telescopic positioning rod 4 until the middle guide rod 12 enters the anti-detachment stopper 101. Since the middle guide rod 12 is always pushed outward by the elastic force of the anti-detachment top spring 120 until the middle guide rod 12 reaches the top of the anti-detachment stopper 101, the smoke detection tube 2 is fastened to the mounting base 1, ensuring that the smoke detection tube 2 will not fall off during use.

[0028] Under normal conditions, combined Figure 2 and Figure 3 It can be seen that the elastic force of the anti-detachment spring 120 pushes the middle guide rod 12 to the right, which not only restricts the smoke detection tube 2 from detaching from the mounting base 1, but also drives the drive shaft 10 to move to the right through the middle guide rod 12. During this process, the movement of the drive shaft 10 to the right will cause the two light baffles 8 to deflect relative to each other, thereby making the photosensitive receiving unit 900 and the infrared light source 9 on the light baffle 8 not relative to each other, and the photosensitive receiving unit 900 cannot receive the light source signal emitted by the infrared light source 9. Therefore, the entire device will not alarm under normal conditions.

[0029] When smoke passes through the filter sleeve 6 and enters between the photosensitive receiving unit 900 and the infrared light source 9, the smoke will scatter the light emitted by the infrared light source 9. The photosensitive receiving unit 900 will start the motor 15 after receiving the signal. The motor 15 drives the knocking rod 16 to rotate. The knocking ball 17 rotates with the knocking rod 16 through the anti-stuck spring 170, and then knocks on the filter sleeve 6. On the one hand, the filter sleeve 6 is hammered to clear the blockage, so as to prevent the filter holes on the filter sleeve 6 from being blocked during the filtering process, resulting in poor smoke circulation; on the other hand, when the knocking ball 17 knocks on the filter sleeve 6, a sound will be generated, thereby alerting the operator that smoke is present and a fire may have occurred.

[0030] When maintenance is needed, the maintenance personnel only need to use a long rod to push the fastening ring sleeve 3, forcing the fastening ring sleeve 3 to push the smoke detection tube 2 to move further upward. As the smoke detection tube 2 drives the middle guide rod 12 to move upward, the middle guide rod 12 is pushed by the disassembly inclined portion 102 to compress the anti-dropping top spring 120. Figure 3 and Figure 4 As shown, the middle guide rod 12 will drive the drive shaft 10 to move to the left until the drive shaft 10 pulls the light shielding plate 8 to a horizontal state. The end of the middle guide rod 12 is pushed by the disassembly inclined portion 102 to move above the smoke detection tube 2. At this time, the middle guide rod 12 will not be blocked by the anti-dropping stopper 101 even if it falls.

[0031] If the whole device works normally, since the light shielding plate 8 is in a horizontal state, the infrared light source 9 and the photosensitive receiving unit 900 are directly opposite to each other, the photosensitive receiving unit 900 will receive the light signal and start the motor 15 to work, the knocking rod 16 drives the knocking ball 17 to rotate continuously, and the knocking ball 17 knocks the filter screen sleeve 6 to make a sound, alerting the operator that the equipment is normal. After that, the operator only needs to remove the long rod. During this process, since the motor 15 continues to work, the knocking ball 17 will also knock the bottom of the light shielding plate 8, forcing the knocking ball 17 to have a tendency to push the light shielding plate 8 to move upward, so that the light shielding plates 8 are in a relatively deflected state. Secondly, the middle guide rod 12 is pushed to the right by the anti-detachment top spring 120, and then the driving shaft 10 is used to push the light shielding plate 8 to move further to the right, forcing the light shielding plates 8 to deflect again and return to the original position.

[0032] Similarly, if the device does not alarm, it means that there is a problem with the components in the smoke detection tube 2 (such as the battery in the power supply and control assembly 5 is low, etc.), which will cause the motor 15 to not rotate and the knocking ball 17 to not knock the bottom of the light shielding plate 8. Combined with the above, the light shielding plate 8 is a rectangular plate. When the ends of the two light shielding plates 8 are attached together, the elastic force of the anti-detachment top spring 120 pushes the middle guide rod 12 to move to the right, which will cause the drive shaft 10 to push the light shielding plate 8 to move to the right. At this time, the end of the light shielding plate 8 is subjected to horizontal elastic jacking and will not cause the light shielding plate 8 to be deflected. Finally, when the maintenance personnel remove the long rod, the smoke detection tube 2 moves downward due to its own gravity. Combined with the fact that the middle guide rod 12 is not pushed out at this time, the middle guide rod 12 will not be blocked by the anti-detachment blocking part 101. The smoke detection tube 2 moves to a low altitude under the guidance of the telescopic positioning rod 4, which is convenient for the maintenance personnel to repair the smoke detection tube 2. Embodiment 2

[0033] Based on the first embodiment, further improvements are made to improve the sensitivity of the device and the false alarm of the device caused by smoke. Figure 4 and Figure 5 It can be seen that the top of the filter cover 6 is fixedly mounted with a fan blade 7 located below the motor 15. The fan blade 7 is arranged obliquely at the top of the filter cover 6. When the filter cover 6 rotates, the fan blade 7 can draw the external airflow into the smoke detection tube 2. Figure 5 It can be clearly seen that there are multiple fan blades 7, and the multiple fan blades 7 are arranged in a circular shape with equal angles. Under normal conditions, when smoke enters the smoke detection tube 2, the photosensitive receiving unit 900 receives the light signal emitted by the infrared light source 9, and then the motor 15 drives the knocking ball 17 to knock the filter cover 6 to make a sound for alarm. At the same time, when the knocking rod 16 passes through the fan blades 7, it will push the fan blades 7 to make the filter cover 6 rotate intermittently. When the filter cover 6 rotates, the airflow under the filter cover 6 will be intensified and sucked into the smoke detection tube 2, so that the airflow between the infrared light source 9 and the photosensitive receiving unit 900 increases.

[0034] In this state, if a false alarm is caused by the passage of dust between the infrared light source 9 and the photosensitive receiving unit 900, the smoke will be blown out from between the infrared light source 9 and the photosensitive receiving unit 900 under the supply of airflow, and discharged from the smoke duct 200 opened at the top of the smoke detection tube 2 to the inner cavity of the mounting base 1, and finally the airflow carrying dust will be discharged outward from the smoke exhaust hole 100 opened on the side of the mounting base 1, so as to avoid the continuous existence of dust between the infrared light source 9 and the photosensitive receiving unit 900 and cause false alarm of the device; similarly, if a fire occurs, a large amount of smoke will be present in the airflow below the filter sleeve 6. When the filter sleeve 6 drives the fan blades 7 to rotate, the smoke will enter between the infrared light source 9 and the photosensitive receiving unit 900 to a greater extent, thereby ensuring that the photosensitive receiving unit 900 stably receives the light signal emitted by the infrared light source 9, thereby realizing that the motor 15 continuously drives the knocking ball 17 to knock on the filter sleeve 6 and generate a sound warning.

[0035] On this basis, refer to Figure 3 , Figure 5 and Figure 6 It can be seen that a resistance-increasing gear ring 600 is provided at the top of the inner side of the filter sleeve 6, and correspondingly, a stopper gear head 14 is provided at the middle of the intermediate guide rod 12, which is fastened by bolts. Figure 3 It can be clearly seen that when the middle guide rod 12 is pushed to the right by the elastic force of the anti-dropping top spring 120, the limit tooth head 14 is attached to the resistance-increasing gear ring 600, thereby increasing the rotational resistance of the filter sleeve 6. More specifically, the end of the limit tooth head 14 is in the shape of an isosceles triangle. When the limit tooth head 14 is pressed against the resistance-increasing gear ring 600, the rotational resistance of the filter sleeve 6 increases, and the resistance-increasing gear ring 600 pushes the inclined surface of the limit tooth head 14, forcing the limit tooth head 14 to push the middle guide rod 12 to move to the left and compress the anti-dropping top spring 120. The advantage of this method is that, according to the above content, when the photosensitive receiving unit 900 receives the light source signal emitted by the infrared light source 9, the motor 15 will be started. When the knocking rod 16 drives the knocking ball 17 to rotate, since the knocking ball 17 is fixed to the end of the knocking rod 16 by the anti-stuck spring 170, the knocking ball 17 will first hammer the filter sleeve 6. The hammering of the filter sleeve 6 by the knocking ball 17 not only clears the filter holes on the filter sleeve 6, but also uses the sound emitted by the knocking for warning. Since the knocking rod 16 and the knocking ball 17 are connected by the anti-stuck spring 170, as the knocking rod 16 deflects, the transmission of the anti-stuck spring 170 is not enough to make the knocking ball 17 push the filter sleeve 6 to rotate, which ensures that the knocking ball 17 in the rotating state always hits the relatively static filter sleeve 6, ensuring that the two hit each other to produce sound, and avoiding the problem of reduced impact force caused by the synchronous movement between the filter sleeve 6 and the knocking ball 17. Afterwards, as the knocking rod 16 continues to rotate, the knocking rod 16 will push the fan blades 7 to rotate, and then the fan blades 7 will push the filter sleeve 6 to rotate, making it easier for the external airflow to be transported to the inside of the smoke detection tube 2. Embodiment 3

[0036] Based on the second embodiment, in order to realize that the smoke detection tube 2 can be used normally, the operator can also remove it from the mounting base 1, see Figure 6 It can be seen that the end of the intermediate guide rod 12 is fixedly connected with a threaded guide rod, and a limited hook 13 is movably installed on the threaded guide rod, and a limited bolt 121 is threadedly connected on the threaded guide rod. The limited bolt 121 is used to limit the movement stroke of the limited hook 13 on the threaded guide rod, forcing the limited hook 13 to move only within a certain range along the threaded guide rod. More specifically, the limited hook 13 is in an "L" shape, and its side is fixedly connected to one end of the anti-detachment top spring 120. The bottom outer side of the limited hook 13 is provided with an oblique angle, and a locking tooth head is arranged on the inner side of the bottom of the limited hook 13. Correspondingly, the top of the filter sleeve 6 is fastened with a limited ring sleeve 601, and the bottom of the limited ring sleeve 601 is provided with a limited annular tooth row corresponding to the locking tooth head. When the locking tooth head cooperates with the limited tooth groove, the knocking rod 16 can be limited from rotating.

[0037] Further, refer to Figure 2 and Figure 4 It can be clearly seen that a reset push rod 11 located above the filter sleeve 6 is movably installed at the top of the inner side of the smoke detection tube 2, and a reset top spring 110 is connected between the reset push rod 11 and the smoke detection tube 2. Under the push of the elastic force of the reset top spring 110, the reset top spring 110 is forced to always have a tendency to push the filter sleeve 6 downward. Under normal conditions, under the elastic force of the reset top spring 110, the reset push rod 11 sticks the filter sleeve 6 to the fastening ring 3, and the filter sleeve 6 is forced not to detach from the bottom of the smoke detection tube 2 by the restriction of the fastening ring 3 on the filter sleeve 6.

[0038] In actual application, if only whether the smoke detection tube 2 can be used normally is to be tested, it is only necessary to use the long rod to push the fastening ring sleeve 3 according to the contents of Example 1, and use the fastening ring sleeve 3 to push the smoke detection tube 2 upward until the middle guide rod 12 moves along the disassembly inclined portion 102. If the device is normal, the smoke detection tube 2 will not fall from the mounting base 1 after the long rod is removed; similarly, if the smoke detection tube 2 fails, the smoke detection tube 2 will be detached from the mounting base 1 after the long rod is detached.

[0039] If it is necessary to disassemble the smoke detection tube 2 that is working normally, use a long rod to push the smoke detection tube 2 upward. At this time, the filter cover 6 is pushed upward to push the reset push rod 11 and compress the reset top spring 110. Since the elastic strength of the reset top spring 110 is relatively greater than the anti-detachment top spring 120, the smoke detection tube 2 will be forced to move upward. When the middle guide rod 12 moves along the disassembly inclined portion 102, the middle guide rod 12 will compress the anti-detachment top spring 120. As the smoke detection tube 2 continues to move upward until it reaches the limit, the middle guide rod 12 and the anti-detachment stopper 101 are relatively far apart (that is, the end of the middle guide rod 12 is not above the anti-detachment stopper 101).

[0040] As the filter sleeve 6 moves upward further, the limiting ring sleeve 601 will hit the bottom inclined surface of the limiting hook 13, and as the filter sleeve 6 moves upward further, the limiting hook 13 further compresses the anti-dropping top spring 120 to the left, until the limiting ring sleeve 601 passes over the inclined surface of the limiting hook 13. Afterwards, the limiting hook 13 is pushed against the limiting ring sleeve 601 by the elastic force of the anti-dropping top spring 120, and at this time, the locking tooth head on the limiting hook 13 is located below the limiting ring tooth row on the limiting ring sleeve 601. Afterwards, by removing the long rod, the limiting ring tooth row on the limiting ring sleeve 601 is pressed tightly against the locking tooth head on the fastening ring sleeve 3 under the elastic force of the reset top spring 110, thereby limiting the rotation of the filter sleeve 6. Combined with the contents in Example 2, it can be known that when the knocking rod 16 rotates, it will push the fan blades 7 to drive the filter sleeve 6 to rotate synchronously. When the filter sleeve 6 is restricted from rotating, the knocking rod 16 is blocked by the fan blades 7 and cannot continue to rotate, thus preventing the knocking ball 17 from knocking on the bottom of the light shielding plate 8, ensuring that the light shielding plate 8 always remains in a horizontal state. The driving shaft 10 is used to limit the middle guide rod 12 from extending outward, so that when the smoke detection tube 2 is downward under gravity, the middle guide rod 12 will not hit the anti-disengagement block 101, and the smoke detection tube 2 can move downward under the guidance of the telescopic positioning rod 4 until the smoke detection tube 2 falls to the maintenance personnel below. Finally, it is realized that the smoke detection tube 2 can be easily disassembled by the maintenance personnel when it is used normally.

Claims

1. A smoke detection and early warning device, characterized in that: include: An installation base (1) is provided with an anti-slip stopper (101) and a disassembly inclined portion (102) on the inner side; A smoke detection tube (2) has an intermediate guide rod (12) movably mounted inside, and an anti-dropping spring (120) is connected between the intermediate guide rod (12) and the smoke detection tube (2); The drive shaft (10) is fixed to the side of the middle guide rod (12), and a light shielding plate (8) is movably installed on the outer side of the drive shaft (10), and the light shielding plate (8) is connected to an infrared light source (9) and a photosensitive receiving unit (900), and the photosensitive receiving unit (900) and the infrared light source (9) are both regulated by a power supply and control assembly (5) fastened to the inner side of the smoke detection tube (2); A filter sleeve (6) movably mounted on the bottom of the smoke detection tube (2); A fastening ring sleeve (3) threadedly connected to the bottom of the smoke detection tube (2); The motor (15) is fixed to the bottom of the smoke detection tube (2), and a knocking rod (16) is tightly connected to the output shaft of the motor (15).

2. The smoke detection and warning device according to claim 1, characterized in that: There are two light baffles (8), both of which are rectangular plates. The tops of the two light baffles (8) are hinged, the end of one light baffle (8) is movably mounted on the drive shaft (10), and the rotating shaft of the other light baffle (8) is mounted on the inner side of the mounting base (1).

3. The smoke detection and warning device according to claim 1 is characterized in that: An anti-jamming spring (170) is fastened to the end of the knocking rod (16), and a knocking ball (17) is fixed to the end of the anti-jamming spring (170).

4. The smoke detection and warning device according to claim 1, characterized in that: A telescopic positioning rod (4) is connected between the mounting base (1) and the smoke detection tube (2).

5. The smoke detection and warning device according to claim 1, characterized in that: A fan blade (7) located below the motor (15) is fixedly mounted on the top of the filter sleeve (6), a smoke conveying duct (200) is provided on the top of the smoke detection tube (2), and a smoke exhaust hole (100) is provided on the side of the mounting base (1).

6. The smoke detection and warning device according to claim 5, characterized in that: A resistance-increasing gear ring (600) is arranged at the top of the inner side of the filter sleeve (6), and a limited-motion gear head (14) is fastened to the middle of the intermediate guide rod (12).

7. The smoke detection and warning device according to claim 6, characterized in that: The end of the intermediate guide rod (12) is fixedly connected to a threaded guide rod, and a limited hook claw (13) is movably installed on the threaded guide rod. The threaded guide rod is threadedly connected to a limited bolt (121). The bottom outer side of the limited hook claw (13) is provided with an oblique angle, and the bottom inner side is provided with a locking tooth head. The top of the filter sleeve (6) is fastened to a limited ring sleeve (601), and the bottom of the limited ring sleeve (601) is provided with a limited annular tooth row corresponding to the locking tooth head.

8. The smoke detection and warning device according to claim 7, characterized in that: A reset top rod (11) located above the filter sleeve (6) is movably mounted on the top of the inner side of the smoke detection tube (2), and a reset top spring (110) is connected between the reset top rod (11) and the smoke detection tube (2).

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