Suction type smoke temperature detection and phosphine detector for tobacco mellow storeroom

Abstract

The utility model discloses an air-breathing smoke temperature detection and hydrogen phosphide detector for a mellow tobacco storehouse, which relates to the field of detectors and comprises a sampling system module, a smoke detection module, a temperature detection module, an H2S detection module, a multi-stage filtering module and a microprocessor module. According to the sampling system module, a latticed sampling pipe network and a three-level grid topology are adopted, a main ring pipe can be selected for laying the pipe network along the wall of a storeroom, a branch pipe can be selected for laying the pipe network at the vertical interval of 5 m, stacking area encrypted sampling holes can be selected for stacking area encrypted sampling holes, the density of the stacking area encrypted sampling holes is 4 holes / m < 2 >, and the density of non-stacking area encrypted sampling holes is 1 hole / m < 2 >. According to the present air-breathing smoke temperature detection and phosphine detector, the fire early warning response time is less than 60 seconds, the H2S concentration monitoring error is less than + / -2% LEL, the equipment anti-corrosion grade is more than IP65, the detection performance is improved, the fire response time is shortened to 45 + / -5 seconds, and the speed is increased by 300% compared with the traditional equipment.

Description

Technical Field

[0001] This utility model relates to the field of detectors, specifically an inhalation-type smoke temperature detector and phosphine detector for use in tobacco aging warehouses. Background Technology

[0002] Detectors are devices for observing and recording particles, indispensable equipment in nuclear physics and particle physics experimental research. Detectors can be divided into two categories: counters and track detectors. Metal detectors utilize the principle of electromagnetic induction, using a coil through which alternating current flows to generate a rapidly changing magnetic field. Types include ionization chambers, proportional counters, Geiger-Miller counters, scintillator detectors, Cherenkov counters, semiconductor detectors, etc. Their primary purpose is to record the number / intensity of particles and to convert the energy information carried by the particles into corresponding electrical signals. Generally, the counter is required to have a certain time resolution, that is, the time interval between two consecutive particles entering the counter can be distinguished. Counters are often used in conjunction with calibration circuits and coincidence circuits.

[0003] Traditional spot smoke detectors typically have a range of 5000m in large aging warehouses. 2 The above issues include response lag: smoke takes 5-10 minutes to diffuse to the detector; densely packed tobacco stacks create blind spots with a coverage rate of less than 70%; the initial smoke concentration during tobacco spontaneous combustion is only 0.01-0.05%obs / m, lower than the sensitivity threshold of 0.01%obs / m for conventional detectors; the lower explosive limit of H2S gas produced by the fumigation and decomposition of aluminum phosphide is 4.3% by volume; existing technologies have shortcomings such as separate installation of independent fire detectors and gas detectors; gas sensors are affected by the high humidity (RH) environment (greater than 85%) in warehouses, resulting in an accuracy drift of more than 15%; and the lack of a pipeline network for active sampling leads to a monitoring delay of more than 3 minutes.

[0004] Therefore, those skilled in the art have provided an inhalation-type smoke temperature detector and phosphine detector for tobacco aging warehouses to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an inhalation-type smoke temperature detector and phosphine detector for tobacco aging warehouses, to solve the problem mentioned in the background art that traditional spot-type smoke detectors are typically limited in large aging warehouses (5000m²). 2The above issues include response lag: smoke takes 5-10 minutes to diffuse to the detector; densely packed tobacco stacks create blind spots with a coverage rate of less than 70%; the initial smoke concentration during tobacco spontaneous combustion is only 0.01-0.05%obs / m, lower than the sensitivity threshold of 0.01%obs / m for conventional detectors; the lower explosive limit of H2S gas produced by the fumigation and decomposition of aluminum phosphide is 4.3% by volume; existing technologies suffer from defects such as separate installation of independent fire detectors and gas detectors; gas sensor accuracy drift exceeding 15% due to the high humidity (RH) environment (greater than 85%) in warehouses; and the lack of a pipeline network for active sampling results in a monitoring delay of more than 3 minutes.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An inhalation-type smoke temperature and phosphine detector for tobacco aging warehouses includes a sampling system module, a smoke detection module, a temperature detection module, an H2S detection module, a multi-stage filtration module, and a microprocessor module.

[0008] Sampling system module: A grid-like sampling network with a three-level grid topology is adopted. Level 1 can use a main loop pipe laid along the warehouse wall. Level 2 can use a branch pipe network with a vertical spacing of 5m. Level 3 can use denser sampling holes in the stacking area, with a density of 4 holes / m. 2 The density of sampling holes in the non-stacking area is 1 hole / m. 2 ;

[0009] Smoke Detection Module: The smoke detection module is equipped with a high-energy LED scattering sensor. The high-energy LED scattering sensor has a wavelength of 650nm and a sensitivity of 0.0001%obs / m. The smoke detection module is also equipped with a dual-threshold alarm logic module, which includes a THEN-activated first-level alarm and a THEN-activated second-level alarm.

[0010] Temperature detection module: The temperature detection module is equipped with a PT100 thermistor, and the accuracy of the PT100 thermistor is ±0.5℃;

[0011] H2S detection module: The H2S detection module is equipped with an electrochemical sensor with a measurement range of 0-1000ppm.

[0012] Multi-stage filtration module: The multi-stage filtration module is equipped with a cyclone separator, a membrane filter, and a HEPA filter element. The membrane filter has a dust removal rate of 99.97% and a water vapor separation rate of 95%.

[0013] Microprocessor module: The microprocessor module is equipped with an ARM Cortex-M4, which has a processing speed of 168MHz.

[0014] As a preferred embodiment of the present invention: in the sampling system module, the main pipe diameter of the grid-like sampling pipe network is Φ25mm, the branch pipe diameter is Φ8mm, the sampling hole spacing is 2m in the conventional area and 0.5m in the stacking area.

[0015] As a preferred embodiment of this utility model: in the sampling system module, the sampling hole inclination angle can be selected as 45°, and the main ABS of the sampling pipeline can be selected as 25mm, and the pipe wall thickness can be selected as 2mm.

[0016] As a preferred embodiment of this utility model: the smoke detection module includes a fire early warning algorithm module and an H2S concentration control module within the dual threshold alarm logic module.

[0017] In a preferred embodiment of this utility model, the warning threshold of the H2S concentration control module in the dual threshold alarm logic module is 10ppm, and the action threshold is 20ppm.

[0018] In a preferred embodiment of this utility model, the sampling system module, smoke detection module, temperature detection module, H2S detection module, multi-stage filtration module and microprocessor module are all located inside a corrosion-resistant housing with an IP66 protection rating. The corrosion-resistant housing contains an aspirating smoke and temperature detection module, a phosphine detection module, a data processing module and a power supply module.

[0019] As a preferred embodiment of this utility model: the phosphine detection module is an electrochemical sensor with a range of 0-1000ppm, a pretreatment chamber with Peltier temperature control, and the temperature control accuracy of the pretreatment chamber is ±0.5℃.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This utility model discloses an aspirating smoke temperature detector and phosphine detector for use in tobacco aging warehouses. The aspirating smoke temperature detector and phosphine detector achieves a fire warning response time of less than 60 seconds, an H2S concentration monitoring error of less than ±2%LEL, and an IP66 or higher corrosion resistance rating. The detection performance is improved, reducing the fire response time to 45±5 seconds, a 300% speed increase compared to traditional equipment. The warehouse coverage is greater than 98%, the blind zone area is less than 2%, and the gas monitoring accuracy (H2S concentration monitoring error) is less than ±0.5ppm. It operates in a standard 25℃ environment with automatic calibration every 24 hours at zero point. The equipment reliability is guaranteed by an IP66 enclosure protection rating conforming to GB / T4208, and its corrosion resistance allows for continuous operation for more than 5 years in environments with H2S concentrations less than 50ppm. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of an aspirating smoke temperature detector and phosphine detector used in a tobacco aging warehouse.

[0024] Figure 2 This is a schematic diagram of a three-level grid topology structure used in an aspirating smoke temperature detector and phosphine detector for tobacco aging warehouses.

[0025] Figure 3 This is a partially enlarged schematic diagram of the sampling hole in an inhalation-type smoke temperature detector and phosphine detector used in a tobacco aging warehouse.

[0026] Figure 4 This is a schematic diagram of a multi-stage filtration system in an aspirating smoke temperature detector and phosphine detector used in a tobacco aging warehouse. Detailed Implementation

[0027] Please see Figure 1-4 In this embodiment of the present invention, an inhalation-type smoke temperature detector and phosphine detector for a tobacco aging warehouse includes a sampling system module, a smoke detection module, a temperature detection module, an H2S detection module, a multi-stage filtration module, and a microprocessor module.

[0028] Sampling system module: A grid-like sampling network with a three-level grid topology is adopted. Level 1 can use a main loop pipe laid along the warehouse wall. Level 2 can use a branch pipe network with a vertical spacing of 5m. Level 3 can use denser sampling holes in the stacking area, with a density of 4 holes / m. 2 The density of sampling holes in the non-stacking area is 1 hole / m. 2 In the sampling system module, the main pipe diameter of the grid-like sampling network is Φ25mm, the branch pipe diameter is Φ8mm, the sampling hole spacing is 2m in the normal area and 0.5m in the stacking area. In the sampling system module, the sampling hole inclination angle can be selected as 45°, and the main pipe ABS of the sampling network can be selected as 25mm, and the pipe wall thickness can be selected as 2mm.

[0029] Smoke Detection Module: The smoke detection module is equipped with a high-energy LED scattering sensor. The high-energy LED scattering sensor has a wavelength of 650nm and a sensitivity of 0.0001%obs / m. The module also includes a dual-threshold alarm logic module, which has a "THEN activates primary alarm" and a "THEN activates secondary alarm" function. Within the dual-threshold alarm logic module, a fire early warning algorithm module and an H2S concentration control module are included. The H2S concentration control module within the dual-threshold alarm logic module has an early warning threshold of 10ppm and an action threshold of 20ppm.

[0030] Temperature detection module: The temperature detection module is equipped with a PT100 thermistor, and the accuracy of the PT100 thermistor is ±0.5℃;

[0031] H2S detection module: The H2S detection module is equipped with an electrochemical sensor with a measurement range of 0-1000ppm.

[0032] Multi-stage filtration module: The multi-stage filtration module is equipped with a cyclone separator, a membrane filter, and a HEPA filter element. The membrane filter has a dust removal rate of 99.97% and a water vapor separation rate of 95%.

[0033] Microprocessor module: The microprocessor module is equipped with an ARM Cortex-M4, which has a processing speed of 168MHz.

[0034] The sampling system module, smoke detection module, temperature detection module, H2S detection module, multi-stage filtration module, and microprocessor module are all housed within an IP66-rated corrosion-resistant enclosure. The enclosure also contains an aspirating smoke and temperature detection module, a phosphine detection module, a data processing module, and a power supply module. The phosphine detection module uses an electrochemical sensor with a range of 0-1000ppm and a pretreatment chamber with Peltier temperature control, achieving a temperature control accuracy of ±0.5℃.

[0035] Currently, aspirating smoke and temperature detectors and phosphine detectors can achieve a fire early warning response time of less than 60 seconds, an H2S concentration monitoring error of less than ±2%LEL, and an equipment corrosion resistance rating of IP66 or higher. The improved detection performance reduces the fire response time to 45±5 seconds, which is 300% faster than traditional equipment.

[0036] Currently, aspirating smoke and temperature detectors and phosphine detectors can achieve a fire early warning response time of less than 60 seconds, an H2S concentration monitoring error of less than ±2%LEL, and an IP66 or higher corrosion resistance rating. During use, the IP66 corrosion-resistant casing provides effective corrosion protection. The warehouse dimensions can be selected as 120m × 60m × 10m (length × width × height). Eight devices are installed evenly, spaced 30m apart. The total pipeline length is 480m for the main loop and 1200m for the branch pipes. If smoke concentration > 0.001%obs / m³ and temperature rise rate > 2℃ / min, then a Level 1 alarm will be activated. If smoke concentration > 0.01%obs / m³ or temperature > 55℃, then a Level 2 alarm will be activated.

[0037] The warehouse coverage is greater than 98%, the blind zone area is less than 2%, the gas monitoring accuracy H2S concentration monitoring error is less than ±0.5ppm, the standard environment is 25℃, the automatic calibration cycle is zero-point calibration every 24 hours, the equipment reliability enclosure protection level is IP66 conforming to GB / T4208, and the corrosion resistance performance is greater than 5 years of continuous operation in an environment with H2S less than 50ppm.

[0038] It can solve the problems of monitoring blind spots, response delays and equipment corrosion in existing technologies. Based on a dual-threshold fire judgment algorithm of smoke concentration and temperature rise rate, it controls the exhaust system when H2S concentration exceeds the limit. The detection performance is improved and the fire response time is shortened to 45±5 seconds, which is 300% faster than traditional equipment. The warehouse coverage is greater than 98%, the blind spot area is less than 2%, the gas monitoring accuracy H2S concentration monitoring error is less than ±0.5ppm, the standard environment of 25℃, the automatic calibration cycle is zero-point calibration every 24 hours, the equipment reliability is IP66 protection level conforming to GB / T4208, and the corrosion resistance is greater than 5 years of continuous operation in an environment with H2S less than 50ppm.

[0039] The working principle of this utility model is as follows: Currently, the aspirating smoke and temperature detector and phosphine detector can achieve a fire early warning response time of less than 60 seconds, an H2S concentration monitoring error of less than ±2%LEL, and an IP65 or higher corrosion resistance rating. During use, the IP66 corrosion-resistant outer shell provides effective corrosion protection. The warehouse dimensions can be selected as 120m × 60m × 10m (length × width × height). Eight devices are evenly distributed with a spacing of 30m. The total pipeline length is 480m for the main loop and 1200m for the branch pipes. If the smoke concentration > 0.001%obs / m³ and the temperature rise rate > 2℃ / min, then a level one alarm will be activated. If the smoke concentration > 0.01%obs / m³ OR the temperature > 55℃, then... The system activates a level-two alarm, resolving issues such as monitoring blind spots, response delays, and equipment corrosion present in existing technologies. Based on a dual-threshold fire detection algorithm using smoke concentration and temperature rise rate, it integrates H2S concentration exceeding limits with exhaust system control, significantly improving detection performance and reducing fire response time to 45±5 seconds—a 300% speed increase compared to traditional equipment. It boasts a warehouse coverage rate greater than 98%, a blind spot area of ​​less than 2%, and gas monitoring accuracy with an H2S concentration monitoring error of less than ±0.5ppm. Operating in a standard 25℃ environment, it features automatic calibration every 24 hours at zero point. The equipment's reliability is ensured by an IP66 enclosure protection rating conforming to GB / T4208, and its corrosion resistance allows for continuous operation for more than 5 years in environments with H2S concentrations below 50ppm.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A suction-type smoke temperature detector and phosphine detector for a tobacco curing barn, characterized by comprising: a suction-type smoke temperature detector; and a phosphine detector which is provided in the vicinity of the suction-type smoke temperature detector and detects a concentration of phosphine in the vicinity of the suction-type smoke temperature detector. It includes a sampling system module, a smoke detection module, a temperature detection module, an H2S detection module, a multi-stage filtration module, and a microprocessor module; Sampling system module: A grid-like sampling network with a three-level grid topology is adopted. Level 1 can use a main loop pipe laid along the warehouse wall. Level 2 can use a branch pipe network with a vertical spacing of 5m. Level 3 can use denser sampling holes in the stacking area, with a density of 4 holes / m. 2 The density of sampling holes in the non-stacking area is 1 hole / m. 2 ; Smoke Detection Module: The smoke detection module is equipped with a high-energy LED scattering sensor. The high-energy LED scattering sensor has a wavelength of 650nm and a sensitivity of 0.0001%obs / m. The smoke detection module is also equipped with a dual-threshold alarm logic module, which includes a THEN-activated first-level alarm and a THEN-activated second-level alarm. Temperature detection module: The temperature detection module is equipped with a PT100 thermistor, and the accuracy of the PT100 thermistor is ±0.5℃; H2S detection module: The H2S detection module is equipped with an electrochemical sensor with a measurement range of 0-1000ppm. Multi-stage filtration module: The multi-stage filtration module is equipped with a cyclone separator, a membrane filter, and a HEPA filter element. The membrane filter has a dust removal rate of 99.97% and a water vapor separation rate of 95%. Microprocessor module: The microprocessor module is equipped with an ARM Cortex-M4, which has a processing speed of 168MHz.

2. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 1, wherein, In the sampling system module, the main pipe diameter of the grid-like sampling pipe network is Φ25mm, the branch pipe diameter is Φ8mm, the sampling hole spacing is 2m in the normal area and 0.5m in the stacking area.

3. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 1, wherein, In the sampling system module, the sampling hole inclination angle can be selected as 45°, and the main ABS of the sampling pipeline can be selected as 25mm, and the pipe wall thickness can be selected as 2mm.

4. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 1, wherein, The smoke detection module includes a fire early warning algorithm module and an H2S concentration control module within its dual-threshold alarm logic module.

5. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 4, wherein, The H2S concentration control module in the dual-threshold alarm logic module has a warning threshold of 10 ppm and an action threshold of 20 ppm.

6. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 1, wherein, The sampling system module, smoke detection module, temperature detection module, H2S detection module, multi-stage filtration module, and microprocessor module are all located inside a corrosion-resistant housing with an IP66 protection rating. The corrosion-resistant housing also houses an aspirating smoke and temperature detection module, a phosphine detection module, a data processing module, and a power supply module.

7. The aspirated smoke and phosphine detector for a tobacco curing barn of claim 6, wherein, The phosphine detection module is an electrochemical sensor with a range of 0-1000ppm, and a pretreatment chamber with Peltier temperature control, and the temperature control accuracy of the pretreatment chamber is ±0.5℃.

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