An accurate reusable gas monitoring alarm

Abstract

The present invention discloses an accurate reusable gas monitoring alarm, which includes an alarm box, an inspection slide rail, a replacement box, an infrared light detection tube, an air extraction pipe and a first reflection tube installed inside a roadway. The bottom of the inspection slide rail is slidably installed with an inspection outer shell, and the tail end of the inspection slide rail is installed inside the replacement box. The infrared light detection tube, the air extraction pipe and the first reflection tube are all installed at the top of the roadway and located at the lower end face of the inspection outer shell. A hydraulic rod is installed at the top of the inner wall of the inspection outer shell, and the bottom of the hydraulic rod is fixedly connected with a mounting plate. A gas filtering mechanism is arranged at the bottom of the mounting plate. For the accurate reusable gas monitoring alarm of the present invention, external gas enters the gas filtering mechanism due to the pressure difference. The gas enters the top of the upper medicine storage pipe through the air inlet pipe. Since calcium chloride and soda lime will deliquesce and become soft and lose their function after absorbing a certain amount of moisture.

Description

Technical Field

[0001] The present invention relates to the technical field of gas monitoring equipment, and particularly relates to an accurate reusable gas monitoring alarm. Background Art

[0002] Gas monitoring alarms are used to detect gas leakage and give timely alarms in places such as underground pipelines or mines, effectively ensuring the safety of workers' lives. The electro-measuring methane detection alarm has high accuracy when detecting low-concentration gas, but when the gas concentration exceeds 5%, the components will have an "activation" phenomenon, causing permanent damage. Therefore, when detecting high-concentration gas underground, an infrared absorption type gas detector is mainly used. By using the principle that gas has selective absorption of infrared radiation, the detection of gas concentration is realized. According to Lambert-Beer's law, the greater the optical path length, the more beneficial it is for precision detection. In order to improve the detection accuracy, a reflection detection method is often used. Under the same optical cell length, the optical path of the reflection type is longer than that of the direct transmission type, which greatly improves the detection of weak optical signals and detection accuracy.

[0003] In order to accurately detect the accurate concentration of high-concentration gas, it is necessary to filter the impurities present in the gas to be detected to improve the accuracy of gas detection. However, the drug loss at the intake end is faster than that at the outlet end during filtration. When the drug loss reaches a certain level, the filtration effect will be greatly reduced, which will affect the accuracy of gas measurement and corrode the device. The existing device cannot replace the drug in time. In addition, in order to improve the detection accuracy, the reflection detection method is used to increase the optical path. However, since the volume of the optical absorption cell is relatively small, the optical path increased by reflection is short. In order to further increase the optical path, a longer optical absorption cell is required, which increases the volume of the device and is not conducive to use underground. For this reason, we propose an accurate reusable gas monitoring alarm. Summary of the Invention

[0004] The main purpose of the present invention is to provide an accurate reusable gas monitoring alarm. The gas is fully processed through the provided gas filtration mechanism, and the light detection mechanism is used to determine that the drug loss has reached a certain level. The optical path is set inside the infrared light detection tube, which greatly increases the optical path while reducing the volume of the detection mechanism. Then, the infrared light is totally reflected in the first reflection tube and the second reflection tube, and directly transmitted to the alarm box. By directly receiving the infrared light signal, there is no need to collect the gas and send it to the detection mechanism for concentration measurement, which greatly improves the speed of obtaining the gas detection result and can effectively solve the problems in the background art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: An accurate reusable gas monitoring alarm, comprising an alarm box, an inspection slide rail, a replacement box, an infrared light detection tube, an air extraction pipe and a first reflection tube installed inside a roadway, characterized in that: An inspection outer shell is slidably installed at the bottom of the inspection slide rail, the tail end of the inspection slide rail is installed inside the replacement box, the infrared light detection tube, the air extraction pipe and the first reflection tube are all installed at the top of the roadway and located at the lower end surface of the inspection outer shell, a hydraulic rod is installed at the top of the inner wall of the inspection outer shell, the bottom of the hydraulic rod is fixedly connected with a mounting plate, and a gas filtering mechanism is arranged at the bottom of the mounting plate.

[0006] A further improvement of the present invention lies in that the gas filtering mechanism includes an upper medicine storage tube and a lower medicine storage tube. The top of the upper medicine storage tube is threadedly connected to the bottom of the mounting plate, the bottom of the lower medicine storage tube is threadedly connected to the bottom of the upper medicine storage tube. Circular sliding plates are arranged inside both the upper medicine storage tube and the lower medicine storage tube. Springs are fixedly connected to the tops of the two circular sliding plates. The top of the spring in the upper medicine storage tube is fixedly connected to the bottom of the mounting plate, and the top of the spring in the lower medicine storage tube is fixedly connected to the bottom of the upper medicine storage tube. A gas distribution cavity is formed inside the circular sliding plate, a first through hole is formed at the top of the circular sliding plate, a second through hole is formed at the bottom of the circular sliding plate, and both the first through hole and the second through hole are communicated with the gas distribution cavity. The diameter of the first through hole is larger than that of the second through hole. A conical block is fixedly installed on the lower surface of the circular sliding plate. An air vent hole is formed at the bottom of the upper medicine storage tube, and an air inlet pipe is installed through the side wall of the upper medicine storage tube. The air inlet pipe is located above the circular sliding plate. An air outlet pipe is installed through the bottom of the lower medicine storage tube. Calcium chloride particles are placed inside the upper medicine storage tube, and soda lime particles are placed inside the lower medicine storage tube.

[0007] The above structure can achieve the following: Due to the pressure difference, the external gas enters the top of the upper medicine storage tube through the intake pipe. Then, the gas passes through the first through-hole formed in the circular slide plate, the gas dispersion chamber, and the second through-hole to contact and filter with the calcium chloride below. Next, the gas enters the lower medicine storage tube through the ventilation hole to contact and filter with the soda lime below. Both calcium chloride and soda lime can absorb the water vapor contained in the gas. At the same time, calcium chloride can adsorb the dust in the gas, and soda lime can absorb the acidic gas in the gas. By removing the impurities existing in the gas to be detected, the accuracy of gas detection is improved. Since calcium chloride and soda lime will deliquesce, soften, and lose their function after absorbing a certain amount of water, and the diameter of the first through-hole is larger than that of the second through-hole, the speed of the gas passing through the second through-hole is slower than that through the first through-hole, resulting in more gas accumulation above the circular slide plate. The circular slide plate will be pressed downward under the action of the gas, driving the spring to stretch. After deliquescing, calcium chloride and soda lime become soft, and the gaps between particles become smaller after being pressed. The conical block is used to open holes in the compressed medicine to prevent the gas from not flowing due to too small gaps. The smaller aperture of the second through-hole slows down the gas flow rate, which helps the gas to fully contact with the calcium chloride and soda lime of the medicine. At the same time, the gas is evenly distributed in the gas dispersion chamber, enabling the medicine farther away from the intake pipe to be fully utilized, which helps to fully remove impurities and improve the accuracy of gas detection.

[0008] A further improvement of the present invention lies in that a second reflection tube is connected inside the infrared light detection tube. The second reflection tube includes a high refractive index glass core and a low refractive index glass cladding. The diameter of the high refractive index glass core matches the inner diameter length of the infrared light detection tube. A partition layer is provided inside the tube wall of the infrared light detection tube, dividing the tube wall into a first cavity and a second cavity. The first cavity is close to the center of the infrared light detection tube, and an antireflection film is provided on the inner wall of the infrared light detection tube.

[0009] The above structure can achieve the following: When a section of the infrared light detection tube to be detected is filled with gas, infrared light undergoes specular reflection inside the outer light detection tube. The antireflection film helps to reduce the loss of infrared light. By determining the incident angle of the infrared light, the inner diameter length of the infrared light detection tube, and the distance between the infrared lamp and the second reflection tube, the optical path of the infrared light can be calculated. By setting the optical path inside the infrared light detection tube, the optical path is greatly increased and the volume of the detection mechanism is reduced. Since the refractive index of the high refractive index glass core is greater than that of the low refractive index glass cladding, infrared light undergoes total internal reflection inside the second reflection tube to reduce the loss of infrared light. The circulating water in the first cavity is used to keep the temperature stable and reduce the influence of environmental temperature changes on the gas detection accuracy. Since the first cavity is relatively long, to avoid absorbing external heat during the water circulation process, the second cavity is filled with air. The low thermal conductivity of air prevents large temperature changes during water circulation and improves the accuracy of gas concentration detection.

[0010] A further improvement of the present invention lies in that the infrared light detection tube is connected to a plurality of second reflection tubes. The bottom ends of the plurality of second reflection tubes are all connected to the first reflection tube, and the distances between adjacent second reflection tubes are the same. An air vent valve and an infrared lamp are installed at the top of the infrared light detection tube. The bottom ends of the air vent valve and the infrared lamp penetrate to the inner diameter surface of the infrared light detection tube. Air vent valves and infrared lamps are provided on the infrared light detection tube between adjacent two second reflection tubes. The suction pipe is communicated with the inner diameter surface of the infrared light detection tube through a plurality of branch pipes provided. The connecting head at the top of the infrared lamp is hemispherical, which helps to avoid dust accumulation.

[0011] The following can be achieved through the above structure: In this way, a section of the infrared light detection tube is filled with the gas to be measured, and there is no need to collect the gas and send it to a testing institution to measure the concentration. The infrared light reflected in the gas is transmitted to the alarm box through the second reflection tube and the first reflection tube. By directly receiving the infrared light signal, the speed of obtaining the gas detection result is greatly improved, and the infrared light undergoes total internal reflection in the second reflection tube and the first reflection tube, with extremely small loss during the transmission process, which helps to improve the detection accuracy.

[0012] A further improvement of the present invention lies in that air bags are installed inside both sides of the inspection shell. Sliding grooves are provided on the inner walls of both sides of the inspection shell. The mounting plate passes through the sliding grooves and is connected to the top of the air bag. A gas filtering mechanism and an infrared light source driving module are fixedly installed at the bottom of the mounting plate. A circular groove is provided at the bottom of the infrared light source driving module and is matched with the hemispherical connecting head at the top of the infrared lamp, which helps for close contact between the two. Jets are installed at the bottom of both sides of the inspection shell. The tops of the two jets are communicated with the bottom of the air bag. The bottom ends of the two jets are bent towards the direction of the gas filtering mechanism and the infrared light source driving module respectively.

[0013] The following can be achieved through the above structure: In this way, when the inspection shell moves to the position where the gas concentration needs to be detected, the hydraulic rod is started, and the gas filtering mechanism and the infrared light source driving module on the mounting plate are respectively inserted downward into the air vent valve and the infrared lamp. The gas filtering mechanism is used to open the air vent valve and filter the gas entering the air vent valve. The infrared light source driving module provides energy for the infrared lamp. At the same time, during the downward movement of the mounting plate, the air bag is squeezed downward, and the gas is ejected through the jets, blowing away the dust accumulated on the air vent valve and the infrared lamp, ensuring good contact to guarantee the smooth progress of the monitoring work.

[0014] A further improvement of the present invention is that the inner wall of the replacement box is installed with a light detection mechanism and a robotic arm, the light detection mechanism includes a light emitter and a light receiver, the light emitter and the light receiver are respectively installed on the left and right sides of the inner wall of the replacement box, the light detection mechanism is installed with two groups to detect the upper medicine storage tube and the lower medicine storage tube respectively, two medicine storage boxes are fixedly installed on the outside of the replacement box, calcium chloride and soda lime are respectively placed inside the two medicine storage boxes, the discharge ports of the two medicine storage boxes are installed with discharge valves, and a waste collection box is installed at the bottom of the inner wall of the replacement box.

[0015] The above structure can achieve the following: when the inspection housing passes through the inspection slide rail and enters the replacement box, the gas filtering mechanism is located between the light detection mechanisms. When the light transmitter emits light, if the calcium chloride and soda lime have not deliquesced, the light receiver can receive the light signal through the gaps between the drug particles. If the calcium chloride and soda lime have deliquesced, the circular slide is squeezed downward during the filtration process, causing the gaps between the drug particles to become smaller, making it difficult for the light receiver to receive the light signal. At this time, the inspection housing moves forward, and the robotic arm unscrews the gas filtering mechanism that needs to replace the drug and pours the drug into the waste collection box. During operation, the robotic arm can rotate, move horizontally, and retract forward and backward. The discharge valve of the drug storage box is opened, and the drugs in the upper and lower drug storage tubes are replaced in time to prevent the drugs from absorbing too much water and becoming a paste-like solid, which will stick to the tube wall and be difficult to clean. Therefore, when the drug loss reaches a certain level, the light receiver can detect it in time, so that the gas filtering mechanism always maintains the best filtration effect, which helps to improve the accuracy of gas measurement.

[0016] A further improvement of the present invention is that a water flow delivery module and a gas delivery module are installed on the side of the alarm box, the water delivery end of the water flow delivery module is connected to the first cavity in the infrared light detection tube, the gas delivery end of the gas delivery module is connected to one end of the exhaust pipe, one end of the first reflection tube is connected to the alarm box, and the interior of the alarm box is provided with an infrared light receiving device, a photoelectric conversion module, a filter amplifier and an alarm.

[0017] The above structure can be used to achieve the following: the water flow conveying module is used to maintain the water circulation in the first cavity in the infrared light detection tube; before detecting the gas concentration, the gas conveying module evacuates the air, and the infrared light detection tube is evacuated to a negative pressure through the exhaust pipe; due to the pressure difference, the external gas fills a section of the infrared light detection tube; after detecting the gas concentration, the gas conveying module is inflated, and the gas in the infrared light detection tube is discharged through the exhaust pipe to facilitate the next detection; the first reflector transmits the infrared light to the infrared light receiving device in the alarm box, and converts the optical signal into an electrical signal through the photoelectric conversion module; the filter amplifier amplifies the weak electrical signal, and can accurately detect the gas concentration, and ensure the safety of the staff through the alarm.

[0018] A further improvement of the present invention lies in an accurate reusable gas monitoring alarm, and the usage steps are as follows:

[0019] A: Start the water flow delivery module to maintain the water circulation in the first cavity of the infrared light detection tube, so as to keep the temperature stable during the detection process. The inspection shell moves to the position where the gas concentration needs to be detected through the inspection slide rail. Start the hydraulic rod, and insert the gas filtration mechanism and the infrared light source driving module on the mounting plate downward into the ventilation valve and the infrared lamp respectively. At the same time, during the downward movement of the mounting plate, the airbag is squeezed downward, and the gas is ejected through the air injection pipe to blow away the dust accumulated on the ventilation valve and the infrared lamp, ensuring good contact to ensure the smooth progress of the monitoring work;

[0020] B: After completing step A, before detecting the gas concentration, the gas delivery module sucks air, and evacuates the inside of the infrared light detection tube to a negative pressure through the suction pipe. Due to the air pressure difference, the outside gas enters the top of the upper medicine storage tube through the intake pipe. Since calcium chloride and soda lime will deliquesce and become soft and lose their function after absorbing a certain amount of water, and the diameter of the first through hole is larger than that of the second through hole, the speed of the gas passing through the second through hole is slower than that through the first through hole, so that more gas accumulates above the circular slide plate. The circular slide plate will be squeezed downward under the action of the gas, and drive the spring to stretch. After deliquescing, calcium chloride and soda lime become soft, and the gaps between the particles become smaller after being squeezed. The conical block is used to open holes in the medicine after being squeezed to prevent the gas from not flowing due to too small gaps. The smaller aperture of the second through hole slows down the gas flow rate, which helps the gas to fully contact with the medicine calcium chloride and soda lime. At the same time, the gas is evenly distributed in the gas dispersion cavity, so that the medicine farther away from the intake pipe can also be fully used, which helps to fully remove impurities and improve the accuracy of gas detection;

[0021] C: After completing step B, when the inside of a section of the infrared light detection tube to be detected is filled with gas, the infrared light source driving module provides energy for the infrared lamp. The infrared light emitted by the infrared lamp undergoes specular reflection on the inner diameter surface of the infrared light detection tube. The antireflection film helps to reduce the loss during the specular reflection of the infrared light. By determining the incident angle of the infrared light, the length of the inner diameter of the infrared light detection tube, and the distance between the infrared lamp and the second reflection tube, the optical path of the infrared light can be calculated. By setting the optical path inside the infrared light detection tube, the optical path is greatly increased and the volume of the detection mechanism is reduced. Then the infrared light undergoes total internal reflection in the first reflection tube and the second reflection tube, and directly transmits the infrared light to the alarm box. By directly receiving the infrared light signal, the speed of the gas detection result is greatly improved, and the infrared light undergoes total internal reflection in the second reflection tube and the first reflection tube, and the loss during the transmission process is extremely small, which helps to improve the detection accuracy;

[0022] D: After step C is completed, when the gas monitoring is finished, the inspection shell enters the replacement box through the inspection slide rail. The gas filtration mechanism is located between the light detection mechanisms. When the light emitter emits light, if the calcium chloride and soda lime are not deliquesced, the light receiver can receive the light signal through the gaps between the medicine particles. If the calcium chloride and soda lime are deliquesced, the circular slide plate presses downwards during the filtration process, reducing the gaps between the medicine particles, making it difficult for the light receiver to receive the light signal. At this time, the inspection shell moves forward, and the robotic arm unscrews the gas filtration mechanism that needs to replace the medicine and pours the ineffective medicine into the waste collection box. The discharge valve of the medicine storage box is opened, and the medicine in the upper medicine storage pipe and the lower medicine storage pipe is replaced in a timely manner, which can prevent the medicine from absorbing too much moisture and becoming a paste-like solid that adheres to the pipe wall and is difficult to clean. Therefore, when the drug loss reaches a certain level, it can be detected in a timely manner through the light detection mechanism, keeping the gas filtration mechanism always in the best filtration effect, which helps to improve the accuracy of gas measurement;

[0023] E: After step D is completed, after detecting the gas concentration, the gas delivery module inflates, and the gas in the infrared light detection tube is discharged through the air extraction pipe by the ventilation valve for the next repeated detection. The first reflection tube transmits the infrared light to the infrared light receiving device in the alarm box, and the optical signal is converted into an electrical signal through the optoelectronic conversion module. The filtering amplifier amplifies the weak electrical signal, and the gas concentration can be accurately detected. The alarm sounds to ensure the safety of the staff's lives.

[0024] Compared with the prior art, in the present invention, the external gas enters the top of the upper medicine storage pipe through the inlet pipe. Since the calcium chloride and soda lime will deliquesce and become soft and lose their function after absorbing a certain amount of moisture, and the diameter of the first through hole is larger than that of the second through hole, the gas passes through the second through hole slower than through the first through hole, resulting in more gas accumulation above the circular slide plate. The circular slide plate will be pressed down under the action of the gas, driving the spring to stretch. After deliquescence, the calcium chloride and soda lime become soft, and the gaps between the particles become smaller after being pressed. The conical block is used to open holes in the pressed medicine to prevent the gas from being unable to flow due to too small gaps. The smaller aperture of the second through hole slows down the gas flow rate, which helps the gas to fully contact with the calcium chloride and soda lime in the medicine. At the same time, the gas is evenly distributed in the gas dispersion cavity, enabling the medicine farther away from the inlet pipe to be fully used, which helps to fully remove impurities and improve the accuracy of gas detection. In addition, since the deliquesced calcium chloride and soda lime particles are pressed by the circular slide plate, it is difficult for the light receiver to receive the light signal emitted by the light emitter, which can determine that the drug loss has reached a certain level. By replacing the drug in a timely manner, the gas filtration mechanism is always kept in the best filtration effect, which helps to improve the accuracy of gas measurement;

[0025] Compared with the prior art, when the inside of an infrared light detection tube is filled with gas, the infrared light source drive module provides energy for the infrared lamp. The infrared light emitted by the infrared lamp undergoes specular reflection on the inner diameter surface of the infrared light detection tube. The antireflection coating helps reduce the loss during the specular reflection of the infrared light. By determining the incident angle of the infrared light, the length of the inner diameter of the infrared light detection tube, and the distance between the infrared lamp and the second reflection tube, the optical path of the infrared light can be calculated. By setting the optical path inside the infrared light detection tube, while greatly increasing the optical path, the volume of the detection mechanism is reduced. Then, the infrared light undergoes total internal reflection in the first reflection tube and the second reflection tube, and directly transmits the infrared light to the alarm box. By directly receiving the infrared light signal, there is no need to collect the gas and send it to the detection mechanism for concentration measurement, which greatly improves the speed of obtaining the gas detection result. Moreover, the infrared light undergoes total internal reflection in the second reflection tube and the first reflection tube, and the loss during the transmission process is extremely small, which helps improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic diagram of the overall structure of an accurate reusable gas monitoring alarm of the present invention.

[0027] Figure 2 FIG. is a schematic diagram of the inspection housing and replacement box structure of an accurate reusable gas monitoring alarm of the present invention.

[0028] Figure 3 FIG. is a schematic cross-sectional view of the inspection housing and replacement box of an accurate reusable gas monitoring alarm of the present invention.

[0029] Figure 4 FIG. is a schematic diagram of the internal structure of the replacement box of an accurate reusable gas monitoring alarm of the present invention.

[0030] Figure 5 FIG. is a schematic cross-sectional view of the gas filtration mechanism of an accurate reusable gas monitoring alarm of the present invention.

[0031] Figure 6 FIG. is an enlarged schematic diagram of A in an accurate reusable gas monitoring alarm of the present invention Figure 1 of the present invention.

[0032] Figure 7 FIG. is a schematic cross-sectional view of the infrared light detection tube and the second reflection tube of an accurate reusable gas monitoring alarm of the present invention.

[0033] In the figure: 1, alarm box; 2, inspection slide rail; 3, inspection outer shell; 4, replacement box; 5, infrared light detection tube; 6, extraction pipe; 7, first reflection tube; 8, water flow conveying module; 9, gas conveying module; 10, light detection mechanism; 11, waste collection box; 12, medicine storage box; 13, discharge valve; 14, robotic arm; 15, hydraulic rod; 16, mounting plate; 17, airbag; 18, air jet pipe; 19, gas filtration mechanism; 20, infrared light source drive module; 21, light emitter; 22, light receiver; 23, upper medicine storage pipe; 24, lower medicine storage pipe; 25, circular sliding plate; 26, spring; 27, gas dispersion cavity; 28, first through hole; 29, second through hole; 30, conical block; 31, ventilation hole; 32, intake pipe; 33, outlet pipe; 34, second reflection tube; 35, high refractive index glass core; 36, low refractive index glass cladding; 37, interlayer; 38, first cavity; 39, second cavity; 40, ventilation valve; 41, infrared lamp. Specific implementation manner

[0034] The present invention will be further described below in conjunction with specific implementation manners. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent. In order to better illustrate the specific implementation manners of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. Based on the specific implementation manners in the present invention, all other specific implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Embodiment 1

[0036] As Figure 1-7 shown, a precise reusable gas monitoring alarm includes an alarm box 1, an inspection slide rail 2, a replacement box 4, an infrared light detection tube 5, an extraction pipe 6, and a first reflection tube 7 installed inside a roadway. The bottom of the inspection slide rail 2 is slidably installed with an inspection outer shell 3. The tail end of the inspection slide rail 2 is installed inside the replacement box 4. The infrared light detection tube 5, the extraction pipe 6, and the first reflection tube 7 are all installed at the top of the roadway and located at the lower end face of the inspection outer shell 3. A hydraulic rod 15 is installed at the top of the inner wall of the inspection outer shell 3. The bottom of the hydraulic rod 15 is fixedly connected to a mounting plate 16. A gas filtration mechanism 19 is arranged at the bottom of the mounting plate 16.

[0037] The gas filtering mechanism 19 includes an upper medicine storage tube 23 and a lower medicine storage tube 24. The top of the upper medicine storage tube 23 is threadedly connected to the bottom of the mounting plate 16, and the bottom of the lower medicine storage tube 24 is threadedly connected to the bottom of the upper medicine storage tube 23. Circular sliding plates 25 are provided inside both the upper medicine storage tube 23 and the lower medicine storage tube 24. Springs 26 are fixedly connected to the tops of the two circular sliding plates 25. The top of the spring 26 inside the upper medicine storage tube 23 is fixedly connected to the bottom of the mounting plate 16, and the top of the spring 26 inside the lower medicine storage tube 24 is fixedly connected to the bottom of the upper medicine storage tube 23. A gas dispersion cavity 27 is formed inside the circular sliding plate 25. A first through hole 28 is formed in the top of the circular sliding plate 25, and a second through hole 29 is formed in the bottom of the circular sliding plate 25. Both the first through hole 28 and the second through hole 29 communicate with the gas dispersion cavity 27. The diameter of the first through hole 28 is larger than that of the second through hole 29. A conical block 30 is fixedly installed on the lower surface of the circular sliding plate 25. A ventilation hole 31 is formed in the bottom of the upper medicine storage tube 23. An air inlet pipe 32 is installed through the side wall of the upper medicine storage tube 23. The air inlet pipe 32 is located on the upper end face of the circular sliding plate 25. An air outlet pipe 33 is installed through the bottom of the lower medicine storage tube 24. Calcium chloride particles are placed inside the upper medicine storage tube 23, and soda lime particles are placed inside the lower medicine storage tube 24.

[0038] Air bags 17 are installed inside both sides of the inspection shell 3. Chute grooves are formed on the inner walls of both sides of the inspection shell 3. The mounting plate 16 passes through the chute grooves and is connected to the top of the air bag 17. A gas filtering mechanism 19 and an infrared light source driving module 20 are fixedly installed at the bottom of the mounting plate 16. A circular groove is formed at the bottom of the infrared light source driving module 20 and is matched with the hemispherical connecting head at the top of the infrared lamp 41 to help the two make close contact. Jet pipes 18 are installed at the bottoms of both sides of the inspection shell 3. The tops of the two jet pipes 18 are communicated with the bottom of the air bag 17. The bottom ends of the two jet pipes 18 are bent towards the directions of the gas filtering mechanism 19 and the infrared light source driving module 20 respectively.

[0039] A light detection mechanism 10 and a robotic arm 14 are installed on the inner wall of the replacement box 4. The light detection mechanism 10 includes a light emitter 21 and a light receiver 22. The light emitter 21 and the light receiver 22 are respectively installed on the left and right sides of the inner wall of the replacement box 4. Two sets of the light detection mechanism 10 are installed to detect the upper medicine storage tube 23 and the lower medicine storage tube 24 respectively. Two medicine storage boxes 12 are fixedly installed on the outside of the replacement box 4. Calcium chloride and soda lime are respectively placed inside the two medicine storage boxes 12. Discharge valves 13 are installed at the discharge ports of the two medicine storage boxes 12. A waste collection box 11 is installed at the bottom of the inner wall of the replacement box 4. The upper medicine storage tube 23 and the lower medicine storage tube 24 are made of transparent glass material, so that the light emitted by the light emitter 21 can pass through the upper medicine storage tube 23 and the lower medicine storage tube 24.

[0040] On the side of the alarm box 1, a water flow conveying module 8 and a gas conveying module 9 are installed. The water output end of the water flow conveying module 8 is communicated with the first cavity 38 in the infrared light detection tube 5. The gas output end of the gas conveying module 9 is connected to one end of the air extraction pipe 6. One end of the first reflecting tube 7 is connected to the alarm box 1. Inside the alarm box 1, an infrared light receiving device, a photoelectric conversion module, a filter amplifier and an alarm are provided.

[0041] By adopting the above technical solution: The external gas enters the top of the upper medicine storage tube 23 through the air inlet pipe 32. Since calcium chloride and soda lime will deliquesce and become soft and lose their function after absorbing a certain amount of moisture, and the diameter of the first through hole 28 is larger than that of the second through hole 29, the speed of the gas passing through the second through hole 29 is slower than that passing through the first through hole 28, so that more gas accumulates above the circular slide plate 25. The circular slide plate 25 will be pressed downward under the action of the gas, and drive the spring 26 to stretch. After deliquescence, calcium chloride and soda lime become soft, and the gaps between the particles become smaller after being pressed. The tapered block 30 is used to open holes in the pressed medicine to prevent the gas from not flowing due to too small gaps. The smaller aperture of the second through hole 29 slows down the gas flow rate, which helps the gas to fully contact with the medicine calcium chloride and soda lime. At the same time, the gas is evenly distributed in the gas distribution cavity 27, so that the medicine farther away from the air inlet pipe 32 can also be fully used, which helps to fully remove impurities to improve the accuracy of gas detection. In addition, since the deliquesced calcium chloride and soda lime particles are pressed by the circular slide plate 25, it is difficult for the light receiver 22 to receive the light signal emitted by the light emitter 21, so it can be determined that the drug loss has reached a certain level. By timely replacing the drug, the gas filtering mechanism 19 always maintains the best filtering effect, which helps to improve the accuracy of gas measurement.

[0042] Embodiment 2

[0043] As Figure 1-7 shown, a precise reusable gas monitoring alarm includes an alarm box 1, an inspection slide rail 2, a replacement box 4, an infrared light detection tube 5, an air extraction pipe 6 and a first reflecting tube 7 installed inside the roadway. An inspection housing 3 is slidably installed at the bottom of the inspection slide rail 2. The tail end of the inspection slide rail is installed inside the replacement box 4. The infrared light detection tube 5, the air extraction pipe 6 and the first reflecting tube 7 are all installed at the top of the roadway and located at the lower end face of the inspection housing 3. A hydraulic rod 15 is installed at the top of the inner wall of the inspection housing 3. The bottom of the hydraulic rod 15 is fixedly connected to a mounting plate 16. A gas filtering mechanism 19 is provided at the bottom of the mounting plate 16.

[0044] The gas filtration mechanism 19 includes an upper medicine storage tube 23 and a lower medicine storage tube 24. The top of the upper medicine storage tube 23 is threadedly connected to the bottom of the mounting plate 16, and the bottom of the lower medicine storage tube 24 is threadedly connected to the bottom of the upper medicine storage tube 23. Circular sliding plates 25 are arranged inside both the upper medicine storage tube 23 and the lower medicine storage tube 24. Springs 26 are fixedly connected to the tops of the two circular sliding plates 25. The top of the spring 26 inside the upper medicine storage tube 23 is fixedly connected to the bottom of the mounting plate 16, and the top of the spring 26 inside the lower medicine storage tube 24 is fixedly connected to the bottom of the upper medicine storage tube 23. A gas dispersion cavity 27 is formed inside the circular sliding plate 25. A first through hole 28 is formed in the top of the circular sliding plate 25, and a second through hole 29 is formed in the bottom of the circular sliding plate 25. Both the first through hole 28 and the second through hole 29 are communicated with the gas dispersion cavity 27. The diameter of the first through hole 28 is larger than that of the second through hole 29. A conical block 30 is fixedly installed on the lower surface of the circular sliding plate 25. An air vent hole 31 is formed in the bottom of the upper medicine storage tube 23. An air inlet pipe 32 is installed through the side wall of the upper medicine storage tube 23. The air inlet pipe 32 is located on the upper end face of the circular sliding plate 25. An air outlet pipe 33 is installed through the bottom of the lower medicine storage tube 24. Calcium chloride particles are placed inside the upper medicine storage tube 23, and soda lime particles are placed inside the lower medicine storage tube 24.

[0045] A second reflection tube 34 is connected inside the infrared light detection tube 5. The second reflection tube 34 includes a high refractive index glass core 35 and a low refractive index glass cladding 36. The diameter of the high refractive index glass core 35 matches the inner diameter length of the infrared light detection tube 5. A partition layer 37 is arranged inside the tube wall of the infrared light detection tube 5 and divides the tube wall into a first cavity 38 and a second cavity 39. The first cavity 38 is close to the center of the infrared light detection tube 5. An antireflection film is provided on the inner wall of the infrared light detection tube 5. The first cavity 38 is used to convey circulating water to keep the internal temperature of the infrared light detection tube 5 stable, and the second cavity 39 is filled with air to avoid too rapid temperature change.

[0046] The infrared light detection tube 5 is connected to a plurality of second reflection tubes 34. The bottoms of the plurality of second reflection tubes 34 are all connected to the first reflection tube 7, and the distances between adjacent second reflection tubes 34 are all the same. An air vent valve 40 and an infrared lamp 41 are installed on the top of the infrared light detection tube 5. The bottoms of the air vent valve 40 and the infrared lamp 41 penetrate to the inner diameter surface of the infrared light detection tube 5. Air vent valves 40 and infrared lamps 41 are provided on the infrared light detection tube 5 between adjacent two second reflection tubes 34. The extraction pipe 6 is communicated with the inner diameter surface of the infrared light detection tube 5 through a plurality of branch pipes provided. The connection head at the top of the infrared lamp 41 is hemispherical to help avoid dust accumulation.

[0047] By adopting the above technical solution: when the inside of an infrared light detection tube 5 is filled with gas, the infrared light source driving module 20 provides energy for the infrared lamp 41. The infrared light emitted by the infrared lamp 41 undergoes specular reflection on the inner diameter surface of the infrared light detection tube 5. The antireflection film helps to reduce the loss during the specular reflection of the infrared light. By determining the incident angle of the infrared light, the length of the inner diameter of the infrared light detection tube 5, and the distance between the infrared lamp 41 and the second reflection tube 34, the optical path of the infrared light can be calculated. By setting the optical path inside the infrared light detection tube 5, while greatly increasing the optical path, the volume of the detection mechanism is reduced. Then, the infrared light undergoes total internal reflection in the first reflection tube 7 and the second reflection tube 34, and directly transmits the infrared light to the alarm box 1. By directly receiving the infrared light signal, there is no need to collect the gas and send it to the detection mechanism for concentration measurement, which greatly improves the speed of obtaining the gas detection result. Moreover, the infrared light undergoes total internal reflection in the second reflection tube 34 and the first reflection tube 7, and the loss during the transmission process is extremely small, which helps to improve the detection accuracy.

[0048] It should be noted that the present invention is an accurate reusable gas monitoring alarm. When in use, first, start the water flow conveying module 8 to enable water circulation in the first cavity 38 of the infrared light detection tube 5 to keep the temperature stable during the detection process. The second cavity 39 is filled with air with low thermal conductivity to avoid large temperature changes during water circulation, improving the accuracy of gas concentration detection. The inspection outer shell 3 moves to the position where the gas concentration needs to be detected through the inspection slide rail 2, and then start the hydraulic rod 15 to insert the gas filtering mechanism 19 and the infrared light source driving module 20 on the mounting plate 16 downward into the ventilation valve 40 and the infrared lamp 41 respectively. During the downward movement of the mounting plate 16, the airbag 17 is squeezed downward to make the gas spray out through the spray pipe 18, blowing away the dust accumulated on the ventilation valve 40 and the infrared lamp 41 to ensure good contact of each component to ensure the smooth progress of the monitoring work. Secondly, before detecting the gas concentration, start the gas conveying module 9 to evacuate the inside of the infrared light detection tube 5 into a negative pressure through the suction pipe 6. Due to the air pressure difference, the outside gas enters the top of the upper medicine storage tube 23 through the air inlet pipe 32. After calcium chloride and soda lime absorb water, they will deliquesce and become soft and lose their effectiveness. And the diameter of the first through hole 28 is larger than that of the second through hole 29, so the speed of the gas passing through the second through hole 29 is slower than that through the first through hole 28, resulting in more gas accumulation above the circular slide plate 25. The circular slide plate 25 will be squeezed downward under the action of the gas and drive the spring 26 to stretch. After deliquescence, calcium chloride and soda lime become soft, and after being squeezed by the circular slide plate 25, the gaps between the medicine particles become smaller. The tapered block 30 is used to open holes in the squeezed medicine to prevent the gas from not flowing due to too small gaps. And the smaller aperture of the second through hole 29 slows down the gas flow rate, which helps the gas to fully contact with the medicines calcium chloride and soda lime. At the same time, the gas is evenly distributed in the gas dispersion cavity 27, enabling the medicines farther away from the air inlet pipe 32 to be fully used, which helps to fully remove impurities and improve the accuracy of gas detection. Then, when the inside of the infrared light detection tube 5 is filled with gas, the infrared light source driving module 20 provides energy for the infrared lamp 41, and the infrared lamp 41 emits infrared light, which undergoes specular reflection on the inner diameter surface of the infrared light detection tube 5. The antireflection film helps to reduce the loss of infrared light during specular reflection. By determining the incident angle of the infrared light, the length of the inner diameter of the infrared light detection tube 5, and the distance between the infrared lamp 41 and the second reflection tube 34, the optical path of the infrared light can be calculated. By setting the optical path inside the infrared light detection tube 5, the optical path is greatly increased and the volume of the detection mechanism is reduced. Then the infrared light undergoes total internal reflection in the first reflection tube 7 and the second reflection tube 34 and is directly transmitted to the alarm box 1. By directly receiving the infrared light signal, the speed of obtaining the gas detection result is greatly improved, and the infrared light undergoes total internal reflection in the second reflection tube 34 and the first reflection tube 7, with extremely small loss during the transmission process, which helps to improve the detection accuracy. Furthermore, when the gas monitoring is completed, the inspection outer shell 3 enters the replacement box 4 through the inspection slide rail 2,The gas filtration mechanism 19 is located between the light detection mechanisms 10. When the light emitter 21 emits light, if the calcium chloride and soda lime are not deliquesced, the light receiver 22 can receive the light signal through the gaps between the drug particles. If the calcium chloride and soda lime deliquesce, the circular slide plate 25 presses downward during the filtration process, reducing the gaps between the drug particles and making it difficult for the light receiver 22 to receive the light signal. At this time, the inspection shell 3 moves forward, and the robotic arm 14 unscrews the gas filtration mechanism 19 that needs to have its drugs replaced and pours the ineffective drugs into the waste collection box 11. The discharge valve 13 of the drug storage box 12 is opened, and the drugs in the upper drug storage pipe 23 and the lower drug storage pipe 24 are replaced in a timely manner. When the drug loss reaches a certain level, it can be detected in a timely manner through the light detection mechanism 10, enabling the gas filtration mechanism 19 to always maintain the best filtration effect, which helps to improve the accuracy of gas measurement. Finally, after detecting the gas concentration, the gas delivery module 9 is started, and the gas in the infrared light detection tube 5 is discharged through the air extraction pipe 6 by the ventilation valve 40 to facilitate repeated detection next time. The first reflection tube 7 transmits the infrared light to the infrared light receiving device in the alarm box 1, and the optical signal is converted into an electrical signal through the photoelectric conversion module. The filter amplifier amplifies the weak electrical signal, and the gas concentration can be accurately detected according to the Lambert-Beer law.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An accurate reusable gas monitoring alarm, comprising an alarm box, an inspection slide rail, a replacement box, an infrared light detection tube, an air extraction pipe and a first reflection tube installed inside a roadway, characterized in that: The bottom of the inspection slide rail is slidably installed with an inspection housing. The tail end of the inspection slide rail is installed inside the replacement box. The infrared light detection tube, the air extraction pipe, and the first reflection tube are all installed at the top of the roadway and located at the lower end face of the inspection housing. At the top of the inner wall of the inspection housing, a hydraulic rod is installed. The bottom of the hydraulic rod is fixedly connected with a mounting plate, and a gas filtering mechanism is arranged at the bottom of the mounting plate; The gas filtering mechanism includes an upper medicine storage tube and a lower medicine storage tube. The top of the upper medicine storage tube is threadedly connected to the bottom of the mounting plate. The bottom of the lower medicine storage tube is threadedly connected to the bottom of the upper medicine storage tube. Circular slides are arranged inside both the upper medicine storage tube and the lower medicine storage tube. At the top of both circular slides, springs are fixedly connected. The top of the spring inside the upper medicine storage tube is fixedly connected to the bottom of the mounting plate. The top of the spring inside the lower medicine storage tube is fixedly connected to the bottom of the upper medicine storage tube. A gas distribution cavity is opened inside the circular slide. A first through hole is opened at the top of the circular slide. A second through hole is opened at the bottom of the circular slide. Both the first through hole and the second through hole are communicated with the gas distribution cavity. The diameter of the first through hole is larger than that of the second through hole. A conical block is fixedly installed on the lower surface of the circular slide. An air vent hole is opened at the bottom of the upper medicine storage tube. An air inlet pipe penetrates through the side wall of the upper medicine storage tube. The air inlet pipe is located above the circular slide. An air outlet pipe penetrates through the bottom of the lower medicine storage tube. Calcium chloride particles are placed inside the upper medicine storage tube. Soda lime particles are placed inside the lower medicine storage tube; A second reflection tube is connected inside the infrared light detection tube. The second reflection tube includes a high refractive index glass core and a low refractive index glass cladding. The diameter of the high refractive index glass core matches the inner diameter of the infrared light detection tube. A partition layer is arranged inside the tube wall of the infrared light detection tube and divides the tube wall into a first cavity and a second cavity. The first cavity is close to the center of the infrared light detection tube. An antireflection film is provided on the inner wall of the infrared light detection tube; The infrared light detection tube is connected to a plurality of second reflection tubes. The bottom ends of the plurality of second reflection tubes are all connected to the first reflection tube, and the distance between adjacent second reflection tubes is the same. An air vent valve and an infrared lamp are installed at the top of the infrared light detection tube. The bottom ends of the air vent valve and the infrared lamp penetrate to the inner diameter surface of the infrared light detection tube. Air vent valves and infrared lamps are provided on the infrared light detection tube between adjacent two second reflection tubes. The air extraction pipe is communicated with the inner diameter surface of the infrared light detection tube through a plurality of branch pipes provided. The connection head at the top of the infrared lamp is hemispherical to help avoid dust accumulation; On both sides inside the inspection shell, air bags are installed. On the inner walls on both sides of the inspection shell, sliding grooves are provided. The mounting plate passes through the sliding grooves and is connected to the top of the air bag. At the bottom of the mounting plate, a gas filtering mechanism and an infrared light source driving module are fixedly installed. A circular groove is provided at the bottom of the infrared light source driving module and is matched with the hemispherical connecting head at the top of the infrared lamp, which helps for close contact between the two. At the bottom of both sides of the inspection shell, air injection pipes are installed. The tops of the two air injection pipes are communicated with the bottom of the air bag. The bottoms of the two air injection pipes are bent respectively towards the directions of the gas filtering mechanism and the infrared light source driving module; On the inner wall of the replacement box, a light detection mechanism and a robotic arm are installed. The light detection mechanism includes a light emitter and a light receiver. The light emitter and the light receiver are respectively installed on the left and right sides of the inner wall of the replacement box. Two groups of the light detection mechanism are installed to detect the upper medicine storage pipe and the lower medicine storage pipe respectively. On the outside of the replacement box, two medicine storage boxes are fixedly installed. Calcium chloride and soda lime are respectively placed inside the two medicine storage boxes. Discharge valves are installed at the discharge ports of the two medicine storage boxes. A waste collection box is installed at the bottom of the inner wall of the replacement box; On the side of the alarm box, a water flow conveying module and a gas conveying module are installed. The water delivery end of the water flow conveying module is communicated with the first cavity in the infrared light detection tube. The gas delivery end of the gas conveying module is connected to one end of the air extraction pipe. One end of the first reflection tube is connected to the alarm box. Inside the alarm box, an infrared light receiving device, a photoelectric conversion module, a filter amplifier and an alarm are provided.

2. A method for using the precise reusable gas monitoring alarm device according to claim 1, characterized in that: The usage steps are as follows: A: Start the water flow conveying module to keep the water circulation in the first cavity of the infrared light detection tube. The inspection shell moves to the position where the gas concentration needs to be detected through the inspection slide rail. Start the hydraulic rod, and insert the gas filtering mechanism and the infrared light source driving module on the mounting plate downwards into the ventilation valve and the infrared lamp respectively; B: After completing step A, before detecting the gas concentration, start the gas conveying module, and evacuate the inside of the infrared light detection tube to a negative pressure through the air extraction pipe. Due to the air pressure difference, the external gas enters the top of the upper medicine storage pipe through the intake pipe. After the gas is filtered by the gas filtering mechanism, it enters the inside of the infrared light detection tube through the ventilation valve; C: After completing step B, when the inside of the infrared light detection tube is filled with gas, the infrared light source driving module provides energy for the infrared lamp, and the infrared lamp emits infrared light, which undergoes specular reflection on the inner diameter surface of the infrared light detection tube. Then the infrared light undergoes total internal reflection in the first reflection tube and the second reflection tube, and directly transmits the infrared light to the alarm box; D: After completing step C, when the gas monitoring is completed, the inspection shell enters the replacement box through the inspection slide rail. Start the light detection mechanism. If the light receiver has difficulty receiving the light signal, the medicine in the gas filtering mechanism needs to be replaced, and the robotic arm is used to replace the medicine in the upper medicine storage pipe and the lower medicine storage pipe in time, so that the gas filtering mechanism always maintains the best filtering effect, which helps to improve the accuracy of gas measurement; E: After completing step D, after detecting the gas concentration, start the gas transmission module, and discharge the gas in the infrared light detection tube through the exhaust pipe by the ventilation valve, which is convenient for repeated detection next time. The first reflection tube transmits the infrared light to the infrared light receiving device in the alarm box, and converts the optical signal into an electrical signal through the photoelectric conversion module. The filter amplifier amplifies the weak electrical signal to accurately detect the gas concentration.

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