A self-checking smoke sensing device

Abstract

The present application relates to the field of internet of things sensor, specifically to a self-checking smoke sensing device. It comprises a junction box, a mounting box and a self-checking assembly; the junction box is internally provided with an internet communication module; the mounting box is arranged at the bottom of the junction box, the top end of the mounting box is internally provided with a detection probe capable of detecting smoke and alkane-containing gas mist, and multiple through holes are uniformly distributed around and at the bottom of the mounting box; the self-checking assembly comprises a fixing clamp and a peristaltic pump arranged in the mounting box, a tank arranged on the fixing clamp, a suction pipe communicated between the tank and the peristaltic pump, a pumping pipe communicated at the output end of the peristaltic pump and a spray head communicated at the outer end of the pumping pipe; during self-checking, the spray head sprays alkane-containing gas mist. The present application can detect the smoke generated by frictional slipping when the conveying belt and the roller slip, trigger an alarm, so as to timely shut down and maintain the belt conveyor, improve safety, and can self-check the detection probe to ensure that the detection probe has normal detection function.

Description

Technical Field

[0001] This invention relates to the field of Internet of Things (IoT) sensors, and in particular to a self-testing smoke sensing device. Background Technology

[0002] A belt conveyor is a mechanical device that transports materials continuously, moving them along a conveyor line from the initial feeding point to the final unloading point, such as for transporting coal. During operation, belt conveyors used for coal transport may experience slippage between the conveyor belt and the rollers, causing the rollers to spin without moving the belt and thus not transporting coal. If workers fail to detect this situation promptly and shut down the conveyor, the excessive friction between the belt and rollers can generate heat, potentially leading to a fire and posing a safety hazard. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a self-testing smoke sensing device. When the conveyor belt and rollers slip, it can detect the smoke generated by friction and slippage, trigger an alarm, so as to shut down and repair the belt conveyor in time, improve safety, and perform self-testing on the detection probe to ensure that the detection probe has normal detection function.

[0004] The technical solution of the present invention is a self-testing smoke sensing device, comprising a junction box, a mounting box, and a self-testing component; the junction box is equipped with an internet communication module; the mounting box is located at the bottom of the junction box, and a detection probe capable of detecting smoke and alkane-containing mist is located at the top of the mounting box; multiple through holes are evenly distributed around the perimeter and bottom of the mounting box; the self-testing component includes a fixing clamp and a peristaltic pump located in the mounting box, a tank located on the fixing clamp, a pumping pipe connecting the tank and the peristaltic pump, a pumping pipe connected to the output end of the peristaltic pump, and a nozzle connected to the outer end of the pumping pipe; during self-testing, the nozzle sprays alkane-containing mist.

[0005] Preferably, an electric push rod is vertically installed inside the mounting box, a lifting plate is installed at the bottom of the electric push rod, a guide bucket is installed on the lifting plate, the upper part of the guide bucket is located on the outer periphery of the detection probe, and the lower part of the guide bucket is flared and located above the nozzle.

[0006] Preferably, a slide cylinder is vertically provided on the top of the inner side of the mounting box, and a slide rod that is slidably connected to the slide cylinder is vertically provided on the lifting plate.

[0007] Preferably, the guide bucket is rotatably mounted on the lifting plate, the lifting plate is provided with a drive assembly for driving the guide bucket to rotate, and a fan assembly is provided at the lower part of the guide bucket.

[0008] Preferably, the fan assembly includes a mounting ring and blades disposed at the bottom of the mounting ring. Multiple blades are evenly distributed around the central axis of the mounting ring, and the blades are eccentrically twisted relative to the central axis of the mounting ring.

[0009] Preferably, a rotating frame is provided at the bottom of the inner side of the mounting box, and a rotating plate is rotatably mounted on the rotating frame. A cover that can block the nozzle is provided at the end of the rotating plate near the nozzle, and the center of gravity of the rotating plate is located on the side near the cover.

[0010] Preferably, the bottom of the blade is provided with a bottom ring coaxially distributed with the mounting ring, the bottom of the bottom ring is evenly distributed with multiple tooth grooves, the top of the mounting ring is provided with multiple lifting rods vertically, the top of the lifting rods is provided with an end platform, and the outer circumference of the guide bucket is provided with a bracket for the lifting rods to slide through.

[0011] Preferably, a spring is connected between the bracket and the mounting ring, and the spring is sleeved on the outer periphery of the lifting rod.

[0012] Preferably, the top of the end of the rotating plate away from the cover is provided with an arc-shaped boss, which is located below the bottom ring.

[0013] Preferably, the rotating frame is provided with a limiting plate that limits the downward rotation range of the rotating plate.

[0014] Compared with existing technologies, this invention has the following beneficial technical effects: This invention can detect the smoke generated by frictional slippage when the conveyor belt and rollers slip, triggering an alarm on the detection probe to facilitate timely shutdown and maintenance of the belt conveyor. It also allows workers to remotely monitor the belt conveyor for slippage faults via the internet, improving safety. Furthermore, it can perform a self-test on the detection probe to ensure it has normal detection functionality. During the self-test, alkane-containing mist is sprayed through a nozzle and detected by the detection probe. The detection probe's functionality is determined by whether it triggers an alarm. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mounting box; Figure 3 This is a partial structural cross-sectional view of an embodiment of the present invention; Figure 4 A cross-sectional view of the structure for illustrating the principle of the ring's vertical vibration. Figure 5 This is a schematic diagram of the spray principle.

[0016] Reference numerals: 1. Junction box; 2. Mounting box; 201. Through hole; 3. Detection probe; 4. Lifting plate; 5. Electric push rod; 6. Slide cylinder; 7. Slide rod; 8. Motor; 9. Gear one; 10. Gear two; 11. Guide bucket; 12. Bracket; 13. Mounting ring; 14. Blade; 15. Bottom ring; 16. Lifting rod; 17. End platform; 18. Spring; 19. Fixing clamp; 20. Tank body; 21. Pumping pipe; 22. Peristaltic pump; 23. Pumping pipe; 24. Nozzle; 25. Rotating frame; 26. Cover; 27. Rotating plate; 28. Boss; 29. ​​Limiting plate. Detailed Implementation

[0017] Example 1: As Figures 1-5 As shown, the self-testing smoke sensor proposed in this embodiment includes a junction box 1, a mounting box 2, and a self-testing component. It is installed on the frame of the belt conveyor, near the junction of the conveyor belt and the rollers, and is installed near the contact area of ​​each roller and the conveyor belt. It is wirelessly networked through the Internet communication module inside the junction box 1 to facilitate remote signal transmission.

[0018] Mounting box 2 is located at the bottom of junction box 1. Inside mounting box 2, at the top, is a detection probe 3 capable of detecting smoke and butane-containing aerosols. Detection probe 3 is an MQ-P5 air quality gas sensor, triggered by smoke and butane. Detection results are transmitted to the central control platform at the operator's location via an internet communication module. Mounting box 2 has multiple through holes 201 distributed around its perimeter and bottom, allowing smoke to enter and be detected by the detection probe 3.

[0019] The self-testing component includes a fixing clip 19 and a peristaltic pump 22 housed within the mounting box 2, a tank 20 mounted on the fixing clip 19, a delivery pipe 21 connecting the tank 20 and the peristaltic pump 22, a pumping pipe 23 connected to the output end of the peristaltic pump 22, and a nozzle 24 connected to the outer end of the pumping pipe 23. The pumping pipe 23 has a rigid pipe structure, and a pipe clamp for fixing the pumping pipe 23 can be further installed on the bottom inner side of the mounting box 2. Because butane is gaseous at room temperature and difficult to seal, it needs to be sealed using the principle of "like dissolves like". The tank 20 contains butane soluble in ethanol, forming a butane-ethanol solution with an ethanol concentration of 30%. Its flash point is above 60°C, which is within the non-flammable range, and the butane-ethanol solution can be sealed and stored at room temperature for a long time.

[0020] This embodiment can detect smoke generated by frictional slippage when the conveyor belt and rollers slip, triggering an alarm to facilitate timely shutdown and maintenance of the belt conveyor, improving safety. It also allows for self-testing of the detection probe, ensuring its proper functioning. The detection probe 3 in this embodiment can be triggered by smoke, making it suitable for detecting smoke generated when the conveyor belt and rollers slip, allowing operators to remotely monitor the belt conveyor for slippage faults via the internet. During self-testing, operators remotely control the peristaltic pump 22 to extract the butane-ethanol solution from the tank 20 and spray it as an alkane-containing mist through the nozzle 24, which is then detected by the detection probe 3. If the detection probe 3 alarms, it indicates that the detection probe 3 is normal; if it does not alarm, it indicates a malfunction requiring timely repair or replacement. The ethanol component in the alkane-containing mist will evaporate and will not damage the detection probe 3.

[0021] Example 2: Figures 1-5 As shown, this embodiment proposes a self-testing smoke sensor. Compared to Embodiment 1, in this embodiment, an electric push rod 5 is vertically installed inside the mounting box 2. A lifting plate 4 is installed at the bottom of the electric push rod 5, which can drive the lifting plate 4 to rise and fall, and is remotely controlled via a central control platform. A guide bucket 11 is installed on the lifting plate 4. The upper part of the guide bucket 11 is located on the outer periphery of the detection probe 3, forming an outflow channel between the guide bucket 11 and the detection probe 3. The lower part of the guide bucket 11 is flared and located above the nozzle 24. The flared structure of the guide bucket 11 can more effectively guide the target detection object upwards, facilitating faster triggering of the detection probe 3 alarm. The target detection object is discharged upwards from the outflow channel. During normal monitoring, the electric push rod 5 retracts, and the guide bucket 11 is in a higher position. After external smoke enters the mounting box 2 through the through hole 201, it is more easily guided upwards by the guide bucket 11, resulting in more smoke. When the detection probe 3 performs a self-test, the electric push rod 5 extends, and the guide bucket 11 is in a lower position. The alkane-containing mist sprayed from the nozzle 24 is more easily guided to the detection probe 3 by the guide bucket 11, thus improving the self-test efficiency.

[0022] like Figure 3 As shown, in order to make the lifting plate 4 rise and fall stably, a sliding cylinder 6 is vertically installed on the top of the inner side of the mounting box 2, and a sliding rod 7 that is slidably connected to the sliding cylinder 6 is vertically installed on the lifting plate 4 to guide the lifting process of the lifting plate 4.

[0023] To further improve the detection speed of the detection probe 3, a guide bucket 11 is rotatably mounted on a lifting plate 4. The lifting plate 4 is equipped with a drive assembly that rotates the guide bucket 11. The drive assembly includes a motor 8 mounted on the lifting plate 4, a gear 9 at the output end of the motor 8, and a gear 10 mounted on the upper part of the guide bucket 11. Gear 10 meshes with gear 9. The motor 8 is remotely controlled via a central control platform to start and stop. The motor 8 drives gear 10 through gear 9, which in turn drives the guide bucket 11. A fan assembly is located at the bottom of the guide bucket 11. The guide bucket 11 drives the fan assembly to rotate, causing it to fan inwards, thus more effectively delivering smoke or alkane-containing aerosols to the detection probe 3 and improving detection efficiency.

[0024] The fan assembly includes a mounting ring 13 and blades 14 disposed at the bottom of the mounting ring 13. Multiple blades 14 are evenly distributed around the central axis of the mounting ring 13, and the blades 14 are eccentrically twisted relative to the central axis of the mounting ring 13. When the blades 14 rotate, they can fan the smoke or alkane-containing mist to the upper inner side of the guide hopper 11, so that it can flow to the detection probe 3 more quickly.

[0025] This embodiment can improve the efficiency of the detection probe 3 in detecting smoke and performing self-tests by using the fan assembly to generate airflow.

[0026] Example 3: Figures 1-5 As shown, this embodiment of the self-testing smoke sensor differs from Embodiment 2 in that, in this embodiment, a rotating frame 25 is provided at the bottom inner side of the mounting box 2, and a rotating plate 27 is rotatably mounted on the rotating frame 25. A cover 26, which can block the nozzle 24, is provided at one end of the rotating plate 27 near the nozzle 24. The center of gravity of the rotating plate 27 is located on the side near the cover 26. In its natural state, the cover 26 covers the top of the nozzle 24 due to its own weight, protecting the nozzle 24 and preventing it from being clogged by smoke and dust when the detection probe 3 is not performing a self-test. When the detection probe 3 needs to perform a self-test, the electric push rod 5 pushes the lifting plate 4 downward, and the blade 14 pushes the outer end of the rotating plate 27 downward, lifting the cover 26 at the other end of the rotating plate 27 and releasing the obstruction of the nozzle 24. At this time, the nozzle 24 can normally spray alkanesic mist.

[0027] like Figure 3 and Figure 4As shown, to enable the blade 14 to vibrate up and down during rotation, a bottom ring 15, coaxially distributed with the mounting ring 13, is provided at the bottom of the blade 14. Multiple toothed grooves are evenly distributed on the bottom of the bottom ring 15. Multiple lifting rods 16 are vertically mounted on the top of the mounting ring 13, with end platforms 17 at the top of each lifting rod 16. A bracket 12 is provided on the outer circumference of the guide bucket 11 for the lifting rods 16 to slide through. A spring 18 connects the bracket 12 and the mounting ring 13, and the spring 18 is sleeved on the outer circumference of the lifting rods 16. An arc-shaped boss 28 is provided at the top of the end of the rotating plate 27 furthest from the cover 26. The boss 28 is located below the bottom ring 15, facilitating the triggering of the bottom ring 15's up and down vibration.

[0028] The rotating frame 25 is equipped with a limiting plate 29 that limits the downward rotation range of the rotating plate 27. When the outer end of the rotating plate 27 rotates downward to contact the limiting plate 29, the rotating plate 27 rotates to its limit position. At this time, the detection probe 3 can perform self-testing. The drive assembly is activated, and the blade plate 14 drives the bottom ring 15 to rotate. The bottom ring 15 contacts the boss 28 through the tooth groove. The bottom ring 15 vibrates up and down. The lifting rod 16 on the mounting ring 13 slides on the bracket 12, and the spring 18 reciprocates. The mounting ring 13, blade plate 14 and bottom ring 15 can achieve up and down vibration during rotation. The vibration process can shake off the smoke particles that were previously attached to the blade plate 14 during detection. During the rotation of the blade plate 14, the alkanes and smoke particles can be fanned into the guide bucket 11 at the same time. The alkanes and smoke particles work together to more easily and quickly trigger the detection probe 3, further improving the self-testing efficiency.

[0029] This embodiment can shake off the smoke particles that were previously attached to the blade 14, and work in synergy with the alkyl-containing mist to perform the self-test of the detection probe 3 more quickly.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A self-testing smoke sensing device, characterized in that, include: Junction box (1) is equipped with an Internet communication module; The mounting box (2) is located at the bottom of the junction box (1). The top of the inside is equipped with a detection probe (3) that can detect smoke and alkane-containing mist. Multiple through holes (201) are evenly distributed around the sides and bottom. The self-testing component includes a fixing clip (19) and a peristaltic pump (22) set in the mounting box (2), a tank (20) set on the fixing clip (19), a pumping pipe (21) connecting the tank (20) and the peristaltic pump (22), a pumping pipe (23) connected to the output end of the peristaltic pump (22), and a nozzle (24) connected to the outer end of the pumping pipe (23). During self-testing, the nozzle (24) sprays out alkane-containing mist.

2. The self-testing smoke sensing device according to claim 1, characterized in that, An electric push rod (5) is vertically installed inside the mounting box (2). A lifting plate (4) is installed at the bottom of the electric push rod (5). A guide bucket (11) is installed on the lifting plate (4). The upper part of the guide bucket (11) is located on the outer periphery of the detection probe (3), and the lower part of the guide bucket (11) is flared and located above the nozzle (24).

3. The self-testable smoke sensing device according to claim 2, characterized in that, The top of the inner side of the mounting box (2) is vertically provided with a slide cylinder (6), and the lifting plate (4) is vertically provided with a slide rod (7) that is slidably connected to the slide cylinder (6).

4. The self-testing smoke sensing device according to claim 2, characterized in that, The guide bucket (11) is rotatably mounted on the lifting plate (4), and the lifting plate (4) is provided with a drive assembly for driving the guide bucket (11) to rotate. A fan assembly is provided at the lower part of the guide bucket (11).

5. The self-testing smoke sensing device according to claim 4, characterized in that, The fan assembly includes a mounting ring (13) and blades (14) disposed at the bottom of the mounting ring (13). Multiple blades (14) are evenly distributed around the central axis of the mounting ring (13), and the blades (14) are eccentrically twisted relative to the central axis of the mounting ring (13).

6. The self-testable smoke sensing device according to claim 5, characterized in that, The mounting box (2) has a rotating frame (25) at the bottom inside. A rotating plate (27) is rotatably mounted on the rotating frame (25). A cover (26) that can block the nozzle (24) is provided at the end of the rotating plate (27) near the nozzle (24). The center of gravity of the rotating plate (27) is located on the side near the cover (26).

7. The self-testable smoke sensing device according to claim 6, characterized in that, The bottom of the blade (14) is provided with a bottom ring (15) coaxially distributed with the mounting ring (13). Multiple tooth grooves are evenly distributed at the bottom of the bottom ring (15). Multiple lifting rods (16) are vertically arranged at the top of the mounting ring (13). An end platform (17) is provided at the top of the lifting rod (16). A bracket (12) is provided on the outer circumference of the guide bucket (11) for the lifting rods (16) to slide through.

8. The self-testable smoke sensing device according to claim 7, characterized in that, A spring (18) is connected between the bracket (12) and the mounting ring (13), and the spring (18) is sleeved on the outer periphery of the lifting rod (16).

9. The self-testable smoke sensing device according to claim 8, characterized in that, The top of the end of the rotating plate (27) away from the cover (26) is provided with an arc-shaped boss (28), which is located below the bottom ring (15).

10. The self-testable smoke sensing device according to claim 9, characterized in that, The rotating frame (25) is provided with a limiting plate (29) that limits the downward rotation range of the rotating plate (27).

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