Extremely early fire monitoring system

Abstract

The invention relates to the technical field of fire monitoring, in particular to an extremely-early-stage fire monitoring system which comprises a bottom frame, a smoke detector is fixedly connected to the surface of the bottom frame, an air exhaust motor is fixedly connected to the surface of the bottom frame, an air exhaust pump is arranged on the surface of the bottom frame, and an alarm is arranged on the surface of the smoke detector. And an air exhaust mechanism is arranged at the input end of the smoke detector. According to the air exhaust mechanism in the monitoring system, two sets of air exhaust systems including the first air exhaust main pipe and the second air exhaust main pipe are used for air exhaust operation, the first air exhaust main pipe and the second air exhaust main pipe alternately conduct air exhaust work, fixed-point air exhaust and range air exhaust are combined, smoke particles in air are prevented from being diluted, and the air exhaust efficiency is improved. Therefore, the monitoring quality is guaranteed, the monitoring range is also guaranteed, the price is moderate, the energy consumption is saved, and the device is suitable for large-scale application of small and medium-sized enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of fire monitoring, and particularly to an ultra-early fire monitoring system. Background Art

[0002] Smoke detection devices play a crucial role in the early prevention of fires. Most of them are installed on ceilings and other places, and judge whether there is a fire by sensing the smoke in the air. Its principle is to capture the scattered light caused by the smoke through the equipped optoelectronic elements, and then realize the early warning of the fire through the control circuit.

[0003] Smoke detection devices actively detect whether there are smoke particles in the air by extracting air samples, so as to achieve ultra-early fire detection. For existing ordinary smoke detection devices, an air extraction main pipe and multiple air extraction nozzles are arranged at the air extraction end, in order to achieve comprehensive extraction of the air in the monitoring area and ensure wide coverage of the monitoring range. However, since a large amount of smoke-free air is inevitably mixed into the extracted air samples, the actual smoke concentration is significantly diluted, thereby greatly reducing the accuracy and sensitivity of the smoke detection devices. High-end smoke detection devices adopt advanced lidar technology or high-precision optical sensors, and through more refined optical detection and data analysis, effectively improve the ability to capture smoke particles, but they are expensive and consume a large amount of electricity, making it difficult to be applied on a large scale. Under the requirements of some small and medium-sized enterprises to both detect quality and have low price and low power consumption, an ultra-early fire monitoring system is provided, which can extract air from the monitoring area at a fixed point. By optimizing the design and layout of the air extraction pipeline, it is ensured that the smoke concentration in the extracted air samples is relatively high, avoiding the dilution problem caused by the traditional multi-point extraction method. Instead of using advanced detection equipment, it adopts conventional optoelectronic sensors with low cost but stable performance, and does not add a large number of energy-consuming driving devices during the monitoring process, ensuring the price while reducing the power consumption. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-early fire monitoring system to solve the problem in the above-mentioned background art that the existing smoke detection devices cannot meet the requirements of small and medium-sized enterprises for both detecting quality and having low price and low power consumption.

[0005] To achieve the above object, the present invention provides the following technical solutions: An ultra-early fire monitoring system: including a chassis, a smoke detector is fixedly connected to the surface of the chassis, an air extraction motor is fixedly connected to the surface of the chassis, an air extraction pump body is arranged on the surface of the chassis, an alarm is arranged on the surface of the smoke detector, and an air extraction mechanism is arranged at the input end of the smoke detector. The air extraction mechanism includes a first air extraction main pipe, the first air extraction main pipe is fixedly connected to the surface of the smoke detector, a first air extraction pipe head is fixedly connected to the surface of the first air extraction main pipe, a fixed rod is fixedly connected inside the first air extraction main pipe, a rotating rod is rotatably connected to the surface of the fixed rod, a blocking block is fixedly connected to the surface of the rotating rod, a guiding cylinder is fixedly connected inside the chassis, a return spring is fixedly connected to the surface of the guiding cylinder, a lifting rod is fixedly connected to the surface of the return spring, the lifting rod is slidably connected to the surface of the guiding cylinder, a movable rod is rotatably connected to the bottom of the lifting rod, and one end of the movable rod away from the lifting rod is rotatably connected to the surface of the rotating rod. A second air extraction main pipe is fixedly connected to the surface of the smoke detector, a second air extraction pipe head is fixedly connected to the surface of the second air extraction main pipe, and a driving mechanism is arranged on the surface of the chassis. The driving mechanism includes a support frame, the support frame is fixedly connected to the surface of the chassis, a differential box is fixedly connected to the surface of the support frame, a driving wheel is fixedly connected to the output shaft of the air extraction motor, a rotating shaft is rotatably connected to the surface of the differential box, a driven wheel is fixedly connected to the surface of the rotating shaft, a transmission belt is connected to the bottom of the driven wheel in a transmission manner, a small gear is fixedly connected to the surface of the rotating shaft, a transmission rod is rotatably connected to the surface of the differential box, a large gear is fixedly connected to the surface of the transmission rod, a reciprocating lead screw is fixedly connected to the surface of the transmission rod, an adjusting nut is threadedly connected to the surface of the reciprocating lead screw, an extrusion plate is fixedly connected to the surface of the adjusting nut, and a disconnection mechanism is arranged on the surface of the support frame. The disconnection mechanism includes a servo motor, the servo motor is fixedly connected to the surface of the support frame, a bidirectional lead screw is fixedly connected to the output shaft of the servo motor, a square nut is threadedly connected to the surface of the bidirectional lead screw, a movable wheel is threadedly connected to the surface of the square nut, and the movable wheel is in contact connection with the surface of the transmission belt.

[0006] Preferably, the smoke detector realizes air extraction through the cooperation of the air extraction motor and the air extraction pump body. The first air extraction main pipe and the second air extraction main pipe extract air at the output end of the smoke detector, and an electromagnetic valve is arranged on the second air extraction main pipe. A control panel is arranged on the surface of the smoke detector, and the smoke detector issues an alarm through the alarm.

[0007] Preferably, the first air extraction main pipe and the second air extraction main pipe are parallel to each other. The first air extraction pipe heads are provided in multiple groups and are linearly and evenly arranged on the surface of the first air extraction main pipe. The second air extraction pipe heads are provided in multiple groups and are linearly and evenly arranged on the surface of the second air extraction main pipe.

[0008] Preferably, the first air extraction pipe heads and the second air extraction pipe heads are distributed in a staggered manner. The diameter of the first air extraction pipe heads is larger than that of the second air extraction pipe heads. Filter systems are provided on both the first air extraction pipe heads and the second air extraction pipe heads. The first air extraction pipe heads and the second air extraction pipe heads are perpendicular to the first air extraction main pipe and the second air extraction main pipe respectively.

[0009] Preferably, the rotating rod drives the blocking block to rotate on the surface of the fixed rod, and the rotation point of the rotating rod is the center of the first air extraction main pipe. The blocking block is in an arc shape. The blocking block slides on the inner wall of the first air extraction main pipe through the rotating rod. The number of the blocking blocks is the same as that of the first air extraction pipe heads, and multiple groups of blocking blocks correspond to multiple groups of first air extraction pipe heads.

[0010] Preferably, guide holes are formed on the surface of the guide cylinder. The return spring is located in the guide holes of the guide cylinder. The lifting rod slides in the guide holes of the guide cylinder. The elastic force of the return spring acts on the movable rod through the lifting rod. The movable rod restricts the position of the blocking block inside the first air extraction main pipe through the rotating rod.

[0011] Preferably, the air extraction motor drives the driving wheel to rotate through the output shaft. The driving wheel is in transmission connection with the transmission belt. The driving wheel drives the driven wheel to rotate inside the differential box through the transmission belt. The driven wheel drives the small gear to rotate inside the differential box through the rotating shaft. The small gear meshes with the large gear. The small gear drives the transmission rod to rotate through the large gear.

[0012] Preferably, the transmission rod penetrates through the inside of the chassis and is fixedly connected to the reciprocating lead screw. The reciprocating lead screw rotates on one side inside the first air extraction main pipe. The reciprocating lead screw drives the adjusting nut to reciprocate inside the first air extraction main pipe through rotation. The adjusting nut drives the pressing plate to move synchronously inside the first air extraction main pipe during the movement process.

[0013] Preferably, one side of the adjusting nut is arc-shaped and fits against the inner wall of the first air extraction main pipe. The pressing plate is in an isosceles trapezoid shape. The two inclined surfaces of the pressing plate squeeze the rotating rod during the movement process and cause the driving rotating rod to rotate on the fixed rod. The length of the pressing plate is less than the length between two groups of blocking blocks.

[0014] Preferably, the servo motor drives a bidirectional lead screw to rotate on the support frame through an output shaft. The bidirectional lead screw drives a square nut to slide on the surface of the support frame through rotation. There are two sets of square nuts, and the sliding directions of the two sets of square nuts are opposite. The square nuts drive the movable wheels to slide synchronously on the surface of the support frame. During the movement of the movable wheels, the conveyor belt is stretched to fit on the surface of the driving wheel.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. For this monitoring system, the air extraction mechanism uses two air extraction systems, namely the first air extraction main pipe and the second air extraction main pipe, for air extraction operations. The first air extraction main pipe and the second air extraction main pipe alternate in air extraction work. The first air extraction main pipe performs fixed-point air extraction through multiple first air extraction pipe heads, and the second air extraction main pipe performs overall air extraction using multiple second air extraction pipe heads. This ensures both fixed-point air extraction and large-range air extraction detection. When performing fixed-point detection, the sample air is not diluted, thus ensuring both the quality and scope of the monitoring. Moreover, high-precision monitoring equipment is not used during the monitoring process. At the same time, the driving mechanism for changing the air extraction position of the first air extraction pipe head is the output shaft of the original air extraction motor, which is moderately priced and saves energy consumption, making it suitable for medium and small-sized enterprises for large-scale application.

[0017] 2. For this monitoring system, when smoke particles occur in the air transmitted by a single set of first air extraction pipe heads through the first air extraction main pipe into the smoke detector, the servo motor drives the bidirectional lead screw to rotate on the support frame through the output shaft. The bidirectional lead screw drives the two sets of square nuts to continuously approach, thereby causing the movable wheels to approach. The movable wheels cancel the stretching of the conveyor belt, causing the bottom of the conveyor belt to disengage from the driving wheel, thus canceling the transmission connection between the driving wheel and the conveyor belt. At this time, the driving wheel cannot drive the driven wheel to rotate through the conveyor belt, so that the transmission rod cannot rotate, and further the reciprocating lead screw cannot rotate, locking the position of the pressing plate inside the first air extraction main pipe. This enables the pressing plate to always limit the position of a set of blocking blocks through the rotating rod, allowing a single set of first air extraction pipe heads to continuously perform fixed-point air extraction to verify the smoke emission point, improving the flexibility of smoke monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 is a bottom partial three-dimensional structural schematic diagram of the present invention;

[0020] Figure 3 is a rear partial three-dimensional structural schematic diagram of the present invention;

[0021] Figure 4For the present invention Figure 3 Schematic enlarged structure diagram at location A in the present invention;

[0022] Figure 5 Rear view, upward view, and partial three-dimensional schematic diagram of the structure of the present invention;

[0023] Figure 6 Front view, sectional view, and partial three-dimensional schematic diagram of the structure of the first air extraction main pipe of the present invention;

[0024] Figure 7 Side view and sectional view schematic diagram of the extrusion location of the internal extrusion plate of the structure of the first air extraction main pipe of the present invention;

[0025] Figure 8 Front view, sectional view, and three-dimensional schematic diagram of the structure of the guiding cylinder of the present invention;

[0026] Figure 9 Front view and three-dimensional schematic diagram of the structure of the extrusion plate of the present invention.

[0027] In the figure: 1, chassis; 11, smoke detector; 12, air extraction motor; 13, air extraction pump body; 14, alarm; 2, first air extraction main pipe; 21, first air extraction pipe head; 22, fixed rod; 23, rotating rod; 24, blocking block; 25, guiding cylinder; 26, return spring; 27, lifting rod; 28, movable rod; 29, second air extraction main pipe; 210, second air extraction pipe head; 3, support frame; 31, differential box; 32, driving wheel; 33, rotating shaft; 34, driven wheel; 35, conveyor belt; 36, small gear; 37, large gear; 38, transmission rod; 4, servo motor; 41, bidirectional lead screw; 42, square nut; 43, movable wheel; 5, reciprocating lead screw; 51, adjusting nut; 52, extrusion plate. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-9 , an embodiment provided by the present invention:

[0030] Ultra-early fire monitoring system: It includes a chassis 1. A smoke detector 11 is fixedly connected to the surface of the chassis 1. An air extraction motor 12 is fixedly connected to the surface of the chassis 1. An air extraction pump body 13 is arranged on the surface of the chassis 1. An alarm 14 is arranged on the surface of the smoke detector 11. An air extraction mechanism is arranged at the input end of the smoke detector 11. The air extraction mechanism includes a first air extraction main pipe 2. The first air extraction main pipe 2 is fixedly connected to the surface of the smoke detector 11. A first air extraction pipe head 21 is fixedly connected to the surface of the first air extraction main pipe 2. A fixing rod 22 is fixedly connected inside the first air extraction main pipe 2. A rotating rod 23 is rotatably connected to the surface of the fixing rod 22. A blocking block 24 is fixedly connected to the surface of the rotating rod 23. A guiding cylinder 25 is fixedly connected inside the chassis 1. A return spring 26 is fixedly connected to the surface of the guiding cylinder 25. A lifting rod 27 is fixedly connected to the surface of the return spring 26. The lifting rod 27 is slidably connected to the surface of the guiding cylinder 25. The bottom of the lifting rod 27 is rotatably connected to a movable rod 28. One end of the movable rod 28 away from the lifting rod 27 is rotatably connected to the surface of the rotating rod 23. A second air extraction main pipe 29 is fixedly connected to the surface of the smoke detector 11. A second air extraction pipe head 210 is fixedly connected to the surface of the second air extraction main pipe 29. A driving mechanism is arranged on the surface of the chassis 1. The driving mechanism includes a support frame 3. The support frame 3 is fixedly connected to the surface of the chassis 1. A differential box 31 is fixedly connected to the surface of the support frame 3. A driving wheel 32 is fixedly connected to the output shaft of the air extraction motor 12. A rotating shaft 33 is rotatably connected to the surface of the differential box 31. A driven wheel 34 is fixedly connected to the surface of the rotating shaft 33. A transmission belt 35 is drivenly connected to the bottom of the driven wheel 34. A small gear 36 is fixedly connected to the surface of the rotating shaft 33. A transmission rod 38 is rotatably connected to the surface of the differential box 31. A large gear 37 is fixedly connected to the surface of the transmission rod 38. A reciprocating lead screw 5 is fixedly connected to the surface of the transmission rod 38. An adjusting nut 51 is threadedly connected to the surface of the reciprocating lead screw 5. An extrusion plate 52 is fixedly connected to the surface of the adjusting nut 51. A disconnection mechanism is arranged on the surface of the support frame 3. The disconnection mechanism includes a servo motor 4. The servo motor 4 is fixedly connected to the surface of the support frame 3. A bidirectional lead screw 41 is fixedly connected to the output shaft of the servo motor 4. A square nut 42 is threadedly connected to the surface of the bidirectional lead screw 41. A movable wheel 43 is threadedly connected to the surface of the square nut 42. The movable wheel 43 is in contact connection with the surface of the transmission belt 35. This monitoring system uses two groups of air extraction systems, namely the first air extraction main pipe 2 and the second air extraction main pipe 29, for air extraction operations. The first air extraction main pipe 2 and the second air extraction main pipe 29 alternate for air extraction work, ensuring fixed-point air extraction while being able to conduct large-range air extraction detection, thereby ensuring both the quality and scope of monitoring. And during the monitoring process, high-precision monitoring equipment is not used, with a moderate price and energy consumption savings.

[0031] Furthermore, the smoke detector 11 achieves air extraction through the cooperation of an air extraction motor 12 and an air extraction pump body 13. The first air extraction main pipe 2 and the second air extraction main pipe 29 extract air at the output end of the smoke detector 11. A solenoid valve is provided on the second air extraction main pipe 29 to control the opening and closing of the second air extraction main pipe 29. A control panel is provided on the surface of the smoke detector 11 for controlling the operation of the entire system. The smoke detector 11 issues an alarm through an alarm 14. When the smoke detector 11 detects smoke, the alarm 14 issues an alarm to alert the staff. The smoke detector 11 performs rapid optical detection on the sample control, thereby monitoring the smoke inside the factory in real time.

[0032] Furthermore, the first air extraction main pipe 2 and the second air extraction main pipe 29 are parallel to each other. Multiple groups of first air extraction pipe heads 21 are provided and are linearly and evenly arranged on the surface of the first air extraction main pipe 2. Multiple groups of second air extraction pipe heads 210 are provided and are linearly and evenly arranged on the surface of the second air extraction main pipe 29.

[0033] Furthermore, the first air extraction pipe heads 21 and the second air extraction pipe heads 210 are staggeredly distributed, thereby expanding the monitoring range. The diameter of the first air extraction pipe heads 21 is larger than that of the second air extraction pipe heads 210. Only one group of the first air extraction pipe heads 21 extracts air, while all groups of the second air extraction pipe heads 210 extract air, ensuring that the air extraction volumes of the first air extraction pipe heads 21 and the second air extraction pipe heads 210 are consistent. Filtering systems are provided on both the first air extraction pipe heads 21 and the second air extraction pipe heads 210 to filter out impurities in the air. The first air extraction pipe heads 21 and the second air extraction pipe heads 210 are perpendicular to the first air extraction main pipe 2 and the second air extraction pipe heads 210 respectively, enabling the first air extraction pipe heads 21 and the second air extraction pipe heads 210 to directly extract the air at the bottom.

[0034] Furthermore, the rotating rod 23 drives the blocking block 24 to rotate on the surface of the fixed rod 22, and the rotation point of the rotating rod 23 is the center of the circle of the first air extraction main pipe 2. The blocking block 24 is arc-shaped. The blocking block 24 slides on the inner wall of the first air extraction main pipe 2 through the rotating rod 23. Since the rotation point of the rotating rod 23 is the center of the circle of the first air extraction main pipe 2, the blocking block 24 can always firmly fit and rotate on the inner wall of the first air extraction main pipe 2. A sealing gasket is provided at the bottom of the blocking block 24, enabling the blocking block 24 to completely block the air extraction of the first air extraction pipe heads 21 inside the first air extraction main pipe 2. The number of the blocking blocks 24 and the first air extraction pipe heads 21 is the same, and multiple groups of blocking blocks 24 correspond to multiple groups of first air extraction pipe heads 21. Multiple groups of blocking blocks 24 can block all the first air extraction pipe heads 21, thereby preventing the entire group of the first air extraction main pipe 2 from extracting air through the first air extraction pipe heads 21. Furthermore, it is convenient to open one group of the first air extraction pipe heads 21 for fixed-point air extraction, thus avoiding the sample air to be detected from being diluted by the air in other areas.

[0035] Further, a guiding hole is formed on the surface of the guiding cylinder 25. The reset spring 26 is located on the guiding hole of the guiding cylinder 25. The lifting rod 27 slides on the guiding hole of the guiding cylinder 25. The elastic force of the reset spring 26 acts on the movable rod 28 through the lifting rod 27. The movable rod 28 restricts the position of the blocking block 24 inside the first air extraction main pipe 2 through the rotating rod 23, so that the blocking block 24 always firmly adheres to the inner wall of the first air extraction main pipe 2, blocking the top of the first air extraction pipe head 21 and preventing the first air extraction main pipe 2 from extracting air through the first air extraction pipe head 21.

[0036] Further, the air extraction motor 12 drives the driving wheel 32 to rotate through the output shaft. The driving wheel 32 is in transmission connection with the transmission belt 35. The driving wheel 32 drives the driven wheel 34 to rotate inside the differential box 31 through the transmission belt 35. The driven wheel 34 drives the small gear 36 to rotate inside the differential box 31 through the rotating shaft 33. The small gear 36 meshes with the large gear 37. The small gear 36 drives the transmission rod 38 to rotate through the large gear 37, so that the transmission rod 38 drives the reciprocating lead screw 5 to rotate synchronously. Since the rotation speed of the output shaft of the air extraction motor 12 is too fast, when the small gear 36 with a smaller diameter drives the large gear 37 to rotate, the rotation speed of the large gear 37 is reduced, thereby ensuring that the rotation speed of the transmission rod 38 will not be too fast and ensuring the stability of the rotation of the transmission rod 38.

[0037] Further, the transmission rod 38 penetrates through the bottom frame 1 and is fixedly connected with the reciprocating lead screw 5. The reciprocating lead screw 5 rotates on one side inside the first air extraction main pipe 2. The reciprocating lead screw 5 drives the adjusting nut 51 to reciprocate inside the first air extraction main pipe 2 through rotation. The adjusting nut 51 drives the pressing plate 52 to move synchronously inside the first air extraction main pipe 2 during the movement, so as to realize the movement of the position of the pressing plate 52. The pressing plate 52 reciprocates inside the first air extraction main pipe 2. The pressing plate 52 can change the position of the blocking block 24 inside the first air extraction main pipe 2 through the rotating rod 23, so as to realize that one group of the first air extraction pipe heads 21 can suck air into the first air extraction main pipe 2.

[0038] Further, one side of the adjusting nut 51 is arc-shaped and fits against the inner wall of the first main air extraction pipe 2. When the reciprocating lead screw 5 rotates, the adjusting nut 51 can linearly slide on the inner wall of the first main air extraction pipe 2. The pressing plate 52 is in the shape of an isosceles trapezoid. The two inclined surfaces of the pressing plate 52 press the rotating rod 23 during movement, causing the driving rotating rod 23 to rotate on the fixed rod 22. After the pressing plate 52 moves out, the rotating rod 23 returns to its original position. The length of the pressing plate 52 is less than the length between the two blocking blocks 24, so that all the rotating rods 23 are not pressed. At this time, the solenoid valve of the second main air extraction pipe 29 is opened, and the second main air extraction pipe 29 intermittently extracts the gas of the whole project through the second air extraction pipe head 210 for detection, ensuring the safety of smoke monitoring.

[0039] Further, the servo motor 4 drives the bidirectional lead screw 41 to rotate on the support frame 3 through the output shaft. The bidirectional lead screw 41 drives the square nut 42 to slide on the surface of the support frame 3 through rotation. There are two sets of square nuts 42, and the sliding directions of the two sets of square nuts 42 are opposite. The square nut 42 drives the movable wheel 43 to slide synchronously on the surface of the support frame 3. During the movement of the movable wheel 43, the transmission belt 35 is stretched to fit against the surface of the driving wheel 32, so that the driving wheel 32 can drive the driven wheel 34 to rotate through the transmission belt 35. When the two movable wheels 43 approach each other, the transmission belt 35 itself is sent to Dongguan, causing the transmission belt 35 to disengage from the driving wheel 32. At this time, the output shaft of the air extraction motor 12 can only cooperate with the air extraction pump body 13 to extract air, and the transmission rod 38 cannot rotate at this time, thereby locking the position of the pressing plate 52 inside the first main air extraction pipe 2, enabling the pressing plate 52 to always limit the position of a set of blocking blocks 24 through the rotating rod 23, so that a single set of first air extraction pipe heads 21 continuously performs fixed-point air extraction, and then verifies the smoke emission point.

[0040] Working principle: The air extraction motor 12 cooperates with the air extraction pump body 13 to enable the smoke detector 11 to extract air through the first air extraction main pipe 2 and the second air extraction main pipe 29. The sample gas extracted by the first air extraction main pipe 2 and the second air extraction main pipe 29 is optically detected for smoke by the smoke detector 11. Multiple groups of second air extraction pipe heads 210 transport the gas to the second air extraction main pipe 29 and then uniformly convey it to the inside of the smoke detector 11 for detection. When the first air extraction main pipe 2 extracts air, the solenoid valve of the second air extraction main pipe 29 will close. The output shaft of the air extraction motor 12 drives the driving wheel 32 to rotate. The driving wheel 32 drives the driven wheel 34 to rotate inside the differential box 31 through the transmission belt 35. The driven wheel 34 drives the pinion 36 to rotate inside the differential box 31 through the rotating shaft 33. The pinion 36 meshes with the large gear 37. The pinion 36 drives the transmission rod 38 to rotate through the large gear 37, so that the transmission rod 38 drives the reciprocating lead screw 5 to rotate synchronously. The reciprocating lead screw 5 drives the adjusting nut 51 to slide on the inner wall of the first air extraction main pipe 2 through rotational drive. The adjusting nut 51 drives the pressing plate 52 to continuously move inside the first air extraction main pipe 2. The pressing plate 52 squeezes through the inclined surfaces on both sides, causing the rotating rod 23 to rotate on the fixed rod 22. The rotating rod 23 drives the blocking block 24 to rotate, so that the blocking block 24 disengages from the top of the first air extraction pipe head 21. At this time, a single group of first air extraction pipe heads 21 can transport the gas to the first air extraction main pipe 2 and then be transported by the first air extraction main pipe 2 to the inside of the smoke detector 11 for detection, avoiding dilution of the sample air. During the movement of the pressing plate 52, it continuously pushes open the blocking blocks 24 inside the first air extraction main pipe 2, thereby opening the air inlet of different first air extraction pipe heads 21. At this time, the original blocking block 24 will return to its original position under the elastic force of the return spring 26 to block the air inhaled by the first air extraction pipe head 21 from entering the inside of the first air extraction main pipe 2, realizing the sampling of the single air in the factory. Moreover, the sampling of the first air extraction main pipe 2 is intermittent, and combined with the range sampling of the second air extraction main pipe 29, it not only ensures the quality of sampling but also ensures the accuracy of sampling.

[0041] When smoke particles occur in the air that is transmitted to the inside of the smoke detector 11 through the single-group first air extraction pipe head 21 via the first air extraction main pipe 2, the servo motor 4 drives the bidirectional lead screw 41 to rotate on the support frame 3 through the output shaft. The bidirectional lead screw 41 drives the two sets of square nuts 42 to continuously approach, thereby causing the movable wheels 43 to approach. The movable wheels 43 cancel the stretching of the conveyor belt 35, causing the bottom of the conveyor belt 35 to separate from the driving wheel 32, thus canceling the transmission connection between the driving wheel 32 and the conveyor belt 35. At this time, the driving wheel 32 cannot drive the driven wheel 34 to rotate through the conveyor belt 35, so that the transmission rod 38 cannot rotate, and further the reciprocating lead screw 5 cannot rotate, locking the position of the pressing plate 52 inside the first air extraction main pipe 2. It can make the pressing plate 52 always limit the position of a set of blocking blocks 24 through the rotating rod 23, enabling the single-group first air extraction pipe head 21 to continuously perform fixed-point air extraction, verifying the smoke emission point, and improving the flexibility of smoke monitoring.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An ultra-early fire detection system, characterized in that: It includes a chassis (1), on the surface of which a smoke detector (11) is fixedly connected, an air extraction motor (12) is fixedly connected, an air extraction pump body (13) is arranged, an alarm (14) is arranged on the surface of the smoke detector (11), and an air extraction mechanism is arranged at the input end of the smoke detector (11). The air extraction mechanism includes a first air extraction main pipe (2), which is fixedly connected to the surface of the smoke detector (11). A first air extraction pipe head (21) is fixedly connected to the surface of the first air extraction main pipe (2). A fixed rod (22) is fixedly connected inside the first air extraction main pipe (2). A rotating rod (23) is rotatably connected to the surface of the fixed rod (22). A blocking block (24) is fixedly connected to the surface of the rotating rod (23). A guiding cylinder (25) is fixedly connected inside the chassis (1). A return spring (26) is fixedly connected to the surface of the guiding cylinder (25). A lifting rod (27) is fixedly connected to the surface of the return spring (26). The lifting rod (27) is slidably connected to the surface of the guiding cylinder (25). The bottom of the lifting rod (27) is rotatably connected to a movable rod (28). One end of the movable rod (28) away from the lifting rod (27) is rotatably connected to the surface of the rotating rod (23). A second air extraction main pipe (29) is fixedly connected to the surface of the smoke detector (11). A second air extraction pipe head (210) is fixedly connected to the surface of the second air extraction main pipe (29). A driving mechanism is arranged on the surface of the chassis (1). The driving mechanism includes a support frame (3), which is fixedly connected to the surface of the chassis (1). A differential box (31) is fixedly connected to the surface of the support frame (3). A driving wheel (32) is fixedly connected to the output shaft of the air extraction motor (12). A rotating shaft (33) is rotatably connected to the surface of the differential box (31). A driven wheel (34) is fixedly connected to the surface of the rotating shaft (33). A transmission belt (35) is drivenly connected to the bottom of the driven wheel (34). A small gear (36) is fixedly connected to the surface of the rotating shaft (33). A transmission rod (38) is rotatably connected to the surface of the differential box (31). A large gear (37) is fixedly connected to the surface of the transmission rod (38). A reciprocating lead screw (5) is fixedly connected to the surface of the transmission rod (38). An adjusting nut (51) is threadedly connected to the surface of the reciprocating lead screw (5). An extrusion plate (52) is fixedly connected to the surface of the adjusting nut (51). A disconnection mechanism is arranged on the surface of the support frame (3). The disconnection mechanism includes a servo motor (4), which is fixedly connected to the surface of the support frame (3). A bidirectional lead screw (41) is fixedly connected to the output shaft of the servo motor (4). A square nut (42) is threadedly connected to the surface of the bidirectional lead screw (41).A movable wheel (43) is threadedly connected to the surface of the square nut (42), and the movable wheel (43) is in contact connection with the surface of the conveyor belt (35).

2. The very early fire detection system according to claim 1, characterized in that: The smoke detector (11) realizes air extraction through the cooperation of an air extraction motor (12) and an air extraction pump body (13). The first air extraction main pipe (2) and the second air extraction main pipe (29) perform air extraction at the output end of the smoke detector (11), and a solenoid valve is provided on the second air extraction main pipe (29). A control panel is provided on the surface of the smoke detector (11), and the smoke detector (11) issues an alarm through an alarm (14).

3. The very early fire detection system according to claim 1, characterized in that: The first air extraction main pipe (2) and the second air extraction main pipe (29) are parallel to each other. Multiple groups of first air extraction pipe heads (21) are provided and are linearly and evenly arranged on the surface of the first air extraction main pipe (2). Multiple groups of second air extraction pipe heads (210) are provided and are linearly and evenly arranged on the surface of the second air extraction main pipe (29).

4. The very early fire detection system according to claim 3, characterized in that: The first air extraction pipe heads (21) and the second air extraction pipe heads (210) are staggeredly distributed. The diameter of the first air extraction pipe head (21) is larger than that of the second air extraction pipe head (210). Filter systems are provided on both the first air extraction pipe head (21) and the second air extraction pipe head (210). The first air extraction pipe head (21) and the second air extraction pipe head (210) are respectively perpendicular to the first air extraction main pipe (2) and the second air extraction pipe head (210).

5. The very early fire detection system according to claim 1, characterized in that: The rotating rod (23) drives the blocking block (24) to rotate on the surface of the fixed rod (22), and the rotation point of the rotating rod (23) is the center of the circle of the first air extraction main pipe (2). The blocking block (24) is arc-shaped. The blocking block (24) slides on the inner wall of the first air extraction main pipe (2) through the rotating rod (23). The number of the blocking blocks (24) is the same as that of the first air extraction pipe heads (21), and multiple groups of blocking blocks (24) correspond to multiple groups of first air extraction pipe heads (21).

6. The very early fire detection system according to claim 1, characterized in that: Guide holes are provided on the surface of the guide cylinder (25). The return spring (26) is located in the guide holes of the guide cylinder (25). The lifting rod (27) slides in the guide holes of the guide cylinder (25). The elastic force of the return spring (26) acts on the movable rod (28) through the lifting rod (27), and the movable rod (28) restricts the position of the blocking block (24) inside the first air extraction main pipe (2) through the rotating rod (23).

7. The very early fire detection system according to claim 1, characterized in that: The air extraction motor (12) drives the driving wheel (32) to rotate through the output shaft. The driving wheel (32) is drivingly connected to the transmission belt (35). The driving wheel (32) drives the driven wheel (34) to rotate inside the differential box (31) through the transmission belt (35). The driven wheel (34) drives the small gear (36) to rotate inside the differential box (31) through the rotating shaft (33). The small gear (36) meshes with the large gear (37), and the small gear (36) drives the transmission rod (38) to rotate through the large gear (37).

8. The very early fire detection system according to claim 1, characterized in that: The transmission rod (38) penetrates through the inside of the chassis (1) and is fixedly connected to the reciprocating lead screw (5). The reciprocating lead screw (5) rotates on one side inside the first air extraction main pipe (2). The reciprocating lead screw (5) drives the adjusting nut (51) to reciprocate inside the first air extraction main pipe (2) through rotation, and the adjusting nut (51) drives the extrusion plate (52) to move synchronously inside the first air extraction main pipe (2) during the movement.

9. The very early fire detection system according to claim 1, characterized in that: One side of the adjusting nut (51) is arc-shaped and fits against the inner wall of the first air extraction main pipe (2). The extrusion plate (52) is in the shape of an isosceles trapezoid. The two inclined surfaces of the extrusion plate (52) squeeze the rotating rod (23) during the movement, and cause the driving rotating rod (23) to rotate on the fixed rod (22). The length of the extrusion plate (52) is less than the length between the two sets of blocking blocks (24).

10. The very early fire detection system according to claim 1, characterized in that: The servo motor (4) drives the bidirectional lead screw (41) to rotate on the support frame (3) through the output shaft. The bidirectional lead screw (41) drives the square nut (42) to slide on the surface of the support frame (3) through rotation. There are two sets of square nuts (42), and the sliding directions of the two sets of square nuts (42) are opposite. The square nut (42) drives the movable wheel (43) to slide synchronously on the surface of the support frame (3). The movable wheel (43) stretches the transmission belt (35) to fit against the surface of the driving wheel (32) during the movement.

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