A real-time early warning device for toxic and harmful gas leakage

Abstract

The application discloses a real-time early warning device for toxic and harmful gas leakage and relates to the technical field of real-time early warning of gas leakage. The device comprises an outer rotor, which is used for driving the whole device to move inside a pipeline; inner spheres, which are rotatably arranged inside the outer rotor along the central axis of the outer rotor, and an installation cavity is formed between the two inner spheres; the whole device is adjusted in real time according to the gas concentration and the light path stability; a microprocessor is used to trigger a driving structure, so that a first micro electromagnetic guide rod in the driving structure pulls or pushes a micro sliding sleeve along the axial sliding direction, thereby reducing the reflection times of a reflecting mirror group and avoiding signal saturation or reduction; when the pipeline vibrates or the temperature changes, causing the light path to deviate, an angle detection sensor is used to capture the angle deviation of the reflecting mirror, so that a second transmission electromagnetic guide rod pushes the reflecting mirror mounting frame in real time, and a micro distance adjusting block compensates for the translation deviation under the action of the second micro electromagnetic guide rod, thereby ensuring that the laser is always focused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of real-time warning of gas leakage, in particular to a real-time warning device for toxic and harmful gas leakage. BACKGROUND

[0002] Toxic and harmful gases (such as chlorine, hydrogen sulfide, ammonia, etc.) in the process of industrial production, storage and transportation, if leakage occurs, will pose a serious threat to human health, production safety and ecological environment. According to statistics, more than 70% of safety accidents in the chemical industry are caused by gas leakage, and more than 60% of the accidents are caused by delayed leakage warning. Therefore, achieving real-time monitoring, accurate warning and rapid positioning of toxic and harmful gas leakage is the core requirement of the industrial safety field.

[0003] The existing toxic and harmful gas leakage warning device is mainly based on optical detection (such as infrared absorption, laser spectroscopy), electrochemical sensing, catalytic combustion, etc. Among them, optical detection has become the mainstream technology due to its high sensitivity (up to ppb level) and fast response speed (milliseconds). However, in actual industrial scenarios, the existing optical detection device still has some problems.

[0004] That is, in the current industrial scene (such as underground pipe network), the existing real-time warning device for toxic and harmful gas leakage has some problems in the process of use. Because the mirrors inside the detection device are fixed, the optical path of the gas chamber is fixed, which makes it difficult to effectively adjust the light path calibration under the influence of different concentrations during detection, resulting in a shift in the light path reflected by the mirror, causing the light path to be out of focus, and thus the accuracy of optical detection is not high. Although the existing technology can adjust the angle of the mirror through the gear and rack structure, it is difficult to achieve high-precision adjustment. The gear and rack will produce a small angle deviation after a long time of use, which may have a greater impact on the optical path of the gas chamber, resulting in a failure to achieve the desired detection accuracy when changing the optical path to enhance the absorption signal of low-concentration gas or reduce the signal saturation caused by high-concentration gas. Therefore, it is necessary to propose a real-time warning device for toxic and harmful gas leakage that can adapt to the gas concentration and achieve high-precision adjustment. SUMMARY

[0005] The purpose of the present application is to provide a real-time warning device for toxic and harmful gas leakage, to solve the problem in the above background that the existing real-time warning device for toxic and harmful gas leakage in industrial scenes (such as underground pipe network) cannot effectively adjust the light path calibration under the influence of different concentrations during detection, which causes the light path reflected by the mirror to deviate, resulting in defocusing of the light path, and thus the accuracy of optical detection is not high.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a real-time warning device for toxic and harmful gas leakage, comprising an outer rotor for driving the overall device to move inside the pipeline;

[0007] An inner sphere is rotatably arranged inside the outer rotor along the central axis of the outer rotor, and the inner spheres on both sides form a mounting cavity;

[0008] The inner part of the mounting cavity is respectively provided with an inner drive assembly, two sets of adjusting gas chamber assemblies and a set of gas chamber dehumidification assemblies, one set of the gas chamber dehumidification assemblies is connected at the top of one set of the adjusting gas chamber assemblies, the inner drive assembly is arranged in the mounting cavity for driving the inner sphere to rotate relative to the outer rotor, and simultaneously driving the two sets of adjusting gas chamber assemblies and the set of gas chamber dehumidification assemblies to form multi-directional rotation inside the inner sphere;

[0009] The adjusting gas chamber assembly comprises:

[0010] A telescopic multi-reflection gas chamber, the inner wall of which is provided with a slidable mirror group along the axial direction, the side end of the mirror group is connected with a driving structure, the driving structure drives the mirror group to slide along the axial direction inside the telescopic multi-reflection gas chamber, and the optical path of the gas chamber is dynamically changed by adjusting the reflection times.

[0011] Preferably, the side end of the telescopic multi-reflective gas chamber is provided with an optical detection module, the optical detection module includes a laser emitting end and a laser receiving end, the laser emitting end and the laser receiving end are respectively arranged at the left and right ends of the telescopic multi-reflective gas chamber, the laser emitted by the laser emitting end is received by the laser receiving end after being reflected by the mirror group in the telescopic multi-reflective gas chamber for multiple times, the other side of the telescopic multi-reflective gas chamber is provided with a micro laser collimator, the adjusting gas chamber assembly is formed by two groups of adjusting gas chamber assemblies arranged in the inner sphere, one group of the adjusting gas chamber assemblies is cooperatively installed with the gas chamber dehumidification assembly at the front end to form a main light path, which detects total absorption signals by using 10.6 μm wavelength (chlorine gas strongly absorbs peak, but water vapor has interference), and the other group of the adjusting gas chamber assemblies forms a reference light path, which detects water vapor interference signals by using 9.6 μm wavelength (only water vapor absorption, no chlorine absorption).

[0012] Preferably, the driving structure includes a micro sliding sleeve, the micro sliding sleeve is slidingly connected outside the axial frame, the side end of the micro sliding sleeve is provided with a first micro electromagnetic guide rod, the side end of the micro sliding sleeve is provided with a side frame, the inside of the side end of the side frame is slidingly connected with a micro distance adjusting block, the side end of the micro distance adjusting block is provided with a second micro electromagnetic guide rod, and the side end of the telescopic multi-reflective gas chamber is provided with a water vapor characteristic analysis unit.

[0013] Preferably, the side end top of the micro distance adjusting block is provided with a bogie, the inside of the side end of the bogie is provided with a first transmission electromagnetic guide rod, which is used to drive the bogie to form horizontal rotation, and the side top of the bogie is provided with an angle detection sensor.

[0014] Preferably, the side end of the angle detection sensor is provided with a second transmission electromagnetic guide rod, the inside of the side end of the angle detection sensor is rotationally connected with a mirror mounting bracket, and the second transmission electromagnetic guide rod is used to drive the mirror mounting bracket to rotate and adjust.

[0015] Preferably, the gas chamber dehumidification assembly includes:

[0016] An air inlet pipeline, the inlet end of the air inlet pipeline is communicated to the telescopic multi-reflective gas chamber;

[0017] A three-stage condensation cavity, the outlet end of the air inlet pipeline is communicated to the three-stage condensation cavity, and the three-stage condensation cavity includes:

[0018] A first-stage condensation cavity, a first semiconductor refrigerator is arranged in the first-stage condensation cavity, the first semiconductor refrigerator cools the gas entering the first-stage condensation cavity to 15 ℃, so as to remove 70% of water vapor;

[0019] A second-stage condensation cavity, the side end outlet of the first-stage condensation cavity is communicated to the second-stage condensation cavity, and a second semiconductor refrigerator is arranged in the second-stage condensation cavity, the second semiconductor refrigerator further cools the gas entering the second-stage condensation cavity by 5 ℃, so that the remaining water vapor is reduced to below 30% of relative humidity.

[0020] The third-stage dehumidification cavity is communicated with the side end outlet of the second-stage condensation cavity, the first-stage condensation cavity, the second-stage condensation cavity and the third-stage dehumidification cavity are sequentially communicated with a valve pipe, a nano-porous molecular sieve is arranged in the third-stage dehumidification cavity, the average pore size of the nano-porous molecular sieve is 0.3 nm, and the nano-porous molecular sieve is used for deeply dehumidifying the gas to a relative humidity of less than 1%.

[0021] Preferably, the outlet end of the third-stage condensation cavity is communicated with a mass flow controller, which is used for stabilizing the gas flow pressure entering the subsequent telescopic multi-reflective gas chamber in a range of ±0.5 kPa, and a humidity sensor is arranged in the outlet end of the third-stage condensation cavity.

[0022] The back surfaces of the first-stage condensation cavity and the second-stage condensation cavity are each provided with a drain port, and the drain port is connected to a quick-release water collecting cavity.

[0023] Preferably, the inner driving assembly comprises a servo motor, and the output end of the servo motor is connected with a belt pulley structure.

[0024] Preferably, the bottom of the servo motor is provided with a slot frame, and the bottom of the slot frame is respectively provided with a data collector, a microprocessor and a early warning device.

[0025] Preferably, a plurality of groups of micro guide rods are embedded on the surface of the outer rotating body, and the ends of the plurality of groups of micro guide rods are provided with damping ends.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] In the application, the overall device can be adjusted according to the gas concentration and the stability of the light path in real time under the cooperation of the adjusting air chamber assembly, the mirror group installed inside can be adjusted according to the signal intensity of the light path receiving end, if the signal intensity of the main light path receiving end is less than 10% of the initial value (high concentration of chlorine), the microprocessor triggers the driving structure, so that the first micro electromagnetic guide rod in the driving structure pulls or pushes the micro sliding sleeve along the axial sliding direction, reduces the reflection times of the mirror group (such as from 10 times to 3 times), avoids signal saturation or reduction, and if the signal signal-to-noise ratio is less than 5:1 (low concentration of chlorine), the reflection times are increased (such as from 10 times to 15 times), the light absorption signal is enhanced, and it is ensured that low concentration (such as 0.1ppm) can be identified, then when the pipeline vibration or temperature change causes the light path to deviate, the angle detection sensor 313 captures the deviation of the mirror angle (more than 0.1°), so that the second transmission electromagnetic guide rod adjusts the mirror mounting frame in real time (adjustment range ±0.5°), and the micro distance adjustment block compensates the translation deviation under the action of the second micro electromagnetic guide rod, so that the laser is always focused, and under the cooperation of the second transmission electromagnetic guide rod and the first transmission electromagnetic guide rod, the bogie and the mirror mounting frame are driven, and the circumferential rotation or angle adjustment is formed under the cooperation of the angle detection sensor. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a separation structure diagram of the main body of the real-time early warning device for toxic and harmful gas leakage.

[0029] Figure 2 It is a structure diagram of the main view of the real-time early warning device for toxic and harmful gas leakage.

[0030] Figure 3 It is an enlarged structure diagram of A in the real-time early warning device for toxic and harmful gas leakage. Figure 1

[0031] Figure 4 It is an internal structure diagram of the inner sphere of the real-time early warning device for toxic and harmful gas leakage.

[0032] Figure 5 It is an installation position structure diagram of the air chamber dehumidification assembly of the real-time early warning device for toxic and harmful gas leakage.

[0033] Figure 6 It is a structure diagram of the inner driving assembly of the real-time early warning device for toxic and harmful gas leakage.

[0034] Figure 7 It is a structure diagram of the air chamber dehumidification assembly of the real-time early warning device for toxic and harmful gas leakage.

[0035] Figure 8 ​It is a structure schematic view of the inside of the telescopic multi-reflective gas chamber in the real-time early warning device for toxic and harmful gas leakage of the application;

[0036] Figure 9 It is a structure schematic view of the adjusting gas chamber assembly in the real-time early warning device for toxic and harmful gas leakage of the application;

[0037] Figure 10 It is a partial structure schematic view of the adjusting gas chamber assembly in the real-time early warning device for toxic and harmful gas leakage of the application.

[0038] In the figure: 100, outer rotor; 200, inner sphere; 300, adjusting gas chamber assembly; 301, telescopic multi-reflective gas chamber; 302, water vapor feature analysis unit; 303, axial frame; 304, optical detection module; 305, driving structure; 306, mirror group; 307, miniature laser collimator; 308, first miniature electromagnetic guide rod; 309, micro-motion sliding sleeve; 310, side frame; 311, second miniature electromagnetic guide rod; 312, second transmission electromagnetic guide rod; 313, angle detection sensor; 314, mirror mounting frame; 315, bogie; 316, first transmission electromagnetic guide rod; 400, inner driving assembly; 401, servo motor; 402, gear meshing structure; 403, bevel gear meshing structure; 404, reduction gear meshing structure; 405, connecting rotating rod; 406, transmission rotating shaft rod; 500, miniature guide rod; 600, damping end; 700, data collector; 800, early warning device; 900, gas chamber dehumidification assembly; 901, first-stage condensation cavity; 902, first semiconductor refrigerator; 903, second-stage condensation cavity; 904, third-stage dehumidification cavity; 905, nano-porous molecular sieve; 906, valve pipe; 907, air inlet pipeline; 110, groove frame. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0040] In the embodiments of the application, reference is made to Figure 1 and Figure 5 As shown in the figure: a real-time early warning device for toxic and harmful gas leakage, applied to pipeline internal detection, comprising an outer rotor 100, an inner sphere 200 and a mounting cavity, an adjusting gas chamber assembly 300 is arranged inside the mounting cavity, the adjusting gas chamber assembly 300 is arranged in two groups, for self-adapting to adjust the mirror according to the change of gas concentration, so as to accurately focus the light path.

[0041] In some embodiments, according to Figures 8-9 As shown, the adjusting air chamber assembly 300 comprises: a telescopic multi-reflection air chamber 301, an optical detection module 304 and a driving structure 305.

[0042] The inner wall of the telescopic multi-reflection air chamber 301 is axially mounted with a slidable mirror group 306, the side end of the mirror group 306 is connected with the driving structure 305, the driving structure 305 drives the mirror group 306 to slide along the axial frame 303 inside the telescopic multi-reflection air chamber 301, the optical path of the air chamber is dynamically changed by adjusting the reflection times, and the side end of the telescopic multi-reflection air chamber 301 is provided with the optical detection module 304.

[0043] The optical detection module 304 comprises a laser emission end and a laser receiving end, the laser emission end and the laser receiving end are respectively arranged at the left and right ends of the telescopic multi-reflection air chamber 301, the laser emitted by the laser emission end is reflected multiple times by the mirror group 306 in the telescopic multi-reflection air chamber 301 and is received by the laser receiving end, and the other side of the telescopic multi-reflection air chamber 301 is provided with a micro laser collimator 307.

[0044] The driving structure 305 comprises a micro sliding sleeve 309, the micro sliding sleeve 309 is slidably connected outside the axial frame 303, the side end of the micro sliding sleeve 309 is provided with a first micro electromagnetic guide rod 308, the side end of the micro sliding sleeve 309 is provided with a side frame 310, the side end of the side frame 310 is slidably connected with a micro distance adjusting block, the side end of the micro distance adjusting block is provided with a second micro electromagnetic guide rod 311, and the side end of the telescopic multi-reflection air chamber 301 is provided with a water vapor characteristic analysis unit 302.

[0045] The side end top of the micro distance adjusting block is provided with a bogie 315, the inner side end of the bogie 315 is provided with a first transmission electromagnetic guide rod 316 for driving the bogie 315 to form horizontal rotation, and the side top of the bogie 315 is provided with an angle detection sensor 313.

[0046] The side end of the angle detection sensor 313 is provided with a second transmission electromagnetic guide rod 312, the inner side of the angle detection sensor 313 is rotationally connected with a mirror mounting frame 314, and the second transmission electromagnetic guide rod 312 is used to drive the mirror mounting frame 314 to rotate and adjust.

[0047] According to the content in the embodiment, specifically: first, in the detection process, the driving structure 305 is used to adjust the reflection times of the mirror group 306 through the micro sliding sleeve 309 and the first micro electromagnetic guide rod 308 and the second micro electromagnetic guide rod 311, to increase the optical path at low concentration and to shorten the optical path at high concentration to avoid saturation, to cover the whole scene from trace leakage to high concentration burst leakage, without frequent range change, to ensure stable detection at different concentrations, that is, when at low concentration, after receiving the microprocessor instruction, the first micro electromagnetic guide rod 308 pushes the micro sliding sleeve 309 to slide a short distance along the axial frame 303 to the direction of the laser emitting end, so that the distance between the initial mirror group 306 and the next mirror group 306 increases, which can be adjusted in turn, and the distance sliding decreases in turn. When the distance increases, the path length of the light in single round-trip reflection increases synchronously, so that the reflection times of the light between the two mirror groups 306 increase, the absorption signal of the low-concentration gas to the light is enhanced, and the trace gas can be identified. When at high concentration, the reflection times of the light between the two mirror groups 306 are reduced, and through the cooperation of the second transmission electromagnetic guide rod 312 and the first transmission electromagnetic guide rod 316, the bogie 315 and the mirror mounting frame 314 are driven, and the circumferential rotation or angle adjustment is formed under the feedback of the angle detection sensor 313. At the same time, when the micro laser collimator 307 is linked and cooperated with the angle detection sensor 313, when the pipeline vibration or temperature change or gas concentration causes the light path to deviate, the second transmission electromagnetic guide rod 312 and the first transmission electromagnetic guide rod 316 real-time fine-tune the mirror angle and the mirror mounting frame 314 position, to ensure that the laser is always focused on the center of the mirror group 306, reduce the light path loss, and maintain the detection stability for a long time, reduce the precision decay caused by environmental interference, that is, the second transmission electromagnetic guide rod 312 real-time pushes the mirror mounting frame 314 to fine-tune the angle in a small range, the first transmission electromagnetic guide rod 316 drives the bogie 315 to rotate horizontally, so that the two cooperate to correct the spatial attitude of the mirror group 306, to ensure that the laser is always focused on the center of the mirror group 306, to avoid light scattering or loss caused by angle deviation.

[0048] In the process of adjusting the reflection by adjusting the gas chamber assembly 300, first, the micro laser collimator 307 can emit visible laser coaxially with the 10.6μm or 9.6μm detection laser of the main light path or reference light path, and the angle detection sensor 313 can real-time monitor the angle deviation of the mirror group 306. If the angle detection sensor 313 detects the angle deviation, the second transmission electromagnetic guide rod 312 pushes the mirror mounting frame 314 to fine-tune the mirror angle, and the first transmission electromagnetic guide rod 316 drives the bogie 315 to rotate horizontally, until the laser is focused on the center of the mirror group 306, to reduce the light path loss.

[0049] At this time, the micro sliding sleeve 309 is driven by the first micro electromagnetic guide rod 308 to slide along the axial frame 303, so that the mirror group 306 forms a distance control.

[0050] Then, when the device enters the continuous detection mode, the double light path synchronous sampling analysis is combined with the dynamic adjustment mechanism to realize the rapid response to the change of gas concentration, so as to output the hierarchical early warning signal to the remote monitoring center when the detection concentration reaches the preset threshold, and at the same time, the inner sphere 200 is accelerated to rotate and position the approximate direction of the leakage source, so as to gain time for emergency disposal and reduce the risk of accident expansion. That is, during the operation, the main light path and the reference light path work synchronously, so that the gas in the pipeline enters the gas chamber dehumidification assembly 900 through the main light path inlet, and then the dry gas enters the telescopic multi-reflective gas chamber 301 of the main light path after the dehumidification operation. At the same time, the reference light path directly inhales the gas (including the original water vapor) in the pipeline into its own telescopic multi-reflective gas chamber 301.

[0051] At this time, the 10.6μm laser emission end of the optical detection module 304 in the main light path is started, and the laser is reflected by the mirror group 306 for many times (such as 10 times), and then the light intensity attenuation (including chlorine absorption and residual water vapor interference) is detected by the receiving end.

[0052] At the same time, the reference light path synchronously emits 9.6μm laser, which has no absorption to chlorine gas, and only detects the light intensity attenuation caused by water vapor absorption as an interference reference signal. At the same time, the water vapor characteristic analysis unit 302 receives two signals in real time, and through analysis (such as main light path signal-reference light path signal x interference coefficient), the influence of water vapor is eliminated to obtain the pure chlorine concentration signal.

[0053] In the detection process, the overall device can be adjusted in real time according to the gas concentration and the stability of the light path. If the signal intensity of the main light path receiving end is less than 10% of the initial value (high concentration of chlorine), the microprocessor triggers the driving structure 305, so that the first micro electromagnetic guide rod 308 in the driving structure 305 pulls or pushes the micro sliding sleeve 309 to slide along the axial frame 303, reducing the reflection times of the mirror group 306 (such as from 10 times to 3 times), avoiding signal saturation or reduction, and if the signal signal-to-noise ratio is less than 5:1 (low concentration of chlorine), the reflection times are increased (such as from 10 times to 15 times), the light absorption signal is enhanced, and the low concentration (such as 0.1 ppm) can be identified. After that, when the pipeline vibration or temperature change causes the light path to deviate, the angle detection sensor 313 captures the deviation of the reflection mirror angle, so that the second transmission electromagnetic guide rod 312 adjusts in real time, and the micro-distance adjusting block compensates for the translation deviation under the action of the second micro electromagnetic guide rod 311, ensuring that the laser is always focused. At the same time, under the cooperation of the second transmission electromagnetic guide rod 312 and the first transmission electromagnetic guide rod 316, the steering frame 315 and the mirror mounting frame 314 are driven, and the circumferential rotation or angle adjustment is formed under the cooperation of the angle detection sensor 313 feedback.

[0054] When the detection concentration reaches the preset threshold, the device starts the early warning and expands the monitoring range, so that the microprocessor outputs a hierarchical signal according to the chlorine concentration (such as first sound and light early warning, and then triggering the pipeline emergency shut-off valve), and the concentration and position (combined with the moving distance of the outer rotating body 100) are transmitted to the remote monitoring center through the wireless module, and the inner driving assembly 400 drives the inner sphere 200 to rotate at high speed, and the two groups of adjusting air chamber assemblies 300 are sequentially oriented to the upper, lower, left and right directions of the pipeline. By comparing the concentration difference in different directions, the approximate direction of the leakage source is located, and then the relative positions of the mirror group 306 and the laser emitting end and receiving end can be adapted in real time, ensuring that the light path can be efficiently reflected and received no matter which direction (such as up, down, left and right) the device is oriented to the pipeline, eliminating the detection blind area, and avoiding the interference of centrifugal force or vibration caused by the rotation of the device to the light path. Finally, high-precision optical detection in all scenes is realized.

[0055] In some embodiments, according to Figure 5 and Figure 7 As shown, the air chamber dehumidification assembly 900 includes an air inlet pipeline 907, the inlet end of which is connected to the telescopic multi-reflection air chamber 301.

[0056] The third condensation cavity is connected to the outlet end of the air inlet pipeline 907, and the third condensation cavity includes a first condensation cavity 901, a second condensation cavity 903, a third dehumidification cavity 904, and a mass flow controller.

[0057] The first-stage condensing cavity 901 is internally provided with a first semiconductor refrigerator 902, which cools the gas entering the first-stage condensing cavity 901 to 15℃ to remove 70% of the water vapor.

[0058] The second-stage condensing cavity 903 is connected to the side end outlet of the first-stage condensing cavity 901 and internally provided with a second semiconductor refrigerator, which further cools the gas entering the second-stage condensing cavity 903 by 5℃, so that the remaining water vapor is reduced to a relative humidity of less than 30%.

[0059] The third-stage dehumidifying cavity 904 is connected to the side end outlet of the second-stage condensing cavity 903, and the first-stage condensing cavity 901, the second-stage condensing cavity 903 and the third-stage dehumidifying cavity 904 are sequentially connected to a valve pipe 906. The third-stage dehumidifying cavity 904 is internally provided with a nano-porous molecular sieve 905 with an average pore size of 0.3 nm, which is used to deeply dehumidify the gas to a relative humidity of less than 1%.

[0060] A mass flow controller is connected to the outlet end of the three-stage condensing cavity, which is used to stabilize the gas flow pressure entering the subsequent telescopic multi-reflective gas chamber 301 within a range of ±0.5 kPa. The outlet end of the three-stage condensing cavity is internally provided with a humidity sensor.

[0061] The back surfaces of the first-stage condensing cavity 901 and the second-stage condensing cavity 903 are each provided with a drain port, which is connected to a quick-release water collecting cavity.

[0062] According to the contents in the present embodiment, in combination with the operation process of the above-mentioned adjusting gas chamber assembly 300, after the detection gas is dehumidified by the gas chamber dehumidifying assembly 900, it enters the adjusting gas chamber assembly 300 for light path adjustment. In this process, the inside of the mounting cavity is further provided with an internal driving assembly 400, an adjusting gas chamber assembly 300 and a gas chamber dehumidifying assembly 900, respectively, and the gas chamber dehumidifying assembly 900 is provided as a group.

[0063] The inner sphere 200 is rotatably arranged inside the outer rotor 100 along the central axis of the outer rotor 100, and a mounting cavity is formed between the two side inner spheres 200. The outer rotor 100 and the inner sphere 200 are provided with through-flow micropores on the surfaces thereof, which are used to suck the detection gas from one side of the outer rotor 100 into the inner sphere 200, dehumidify the detection gas by the gas chamber dehumidifying assembly 900, adjust the detection gas in the adjusting gas chamber assembly 300, and then discharge the detection gas through the other side of the outer rotor 100.

[0064] A set of gas chamber dehumidification assemblies 900 are connected to the top of a set of adjusting gas chamber assemblies 300, and an inner driving assembly 400 is arranged in the mounting cavity to drive the inner sphere 200 to rotate relative to the outer rotor 100, and synchronously drive the two sets of adjusting gas chamber assemblies 300 and the set of gas chamber dehumidification assemblies 900 to form multi-orientation rotation inside the inner sphere 200.

[0065] And in which, the adjusting gas chamber assemblies 300 form two sets arranged inside the inner sphere 200, and the front end of a set of adjusting gas chamber assemblies 300 is equipped with a gas chamber dehumidification assembly 900 to form a main light path after cooperation and installation, which adopts a 10.6 μm wavelength chlorine gas strong absorption peak, but the water vapor interferes with the detection of the total absorption signal, and the other set of adjusting gas chamber assemblies 300 forms a reference light path, which adopts a 9.6 μm wavelength only water vapor absorption, and no chlorine gas absorption to detect water vapor interference signals.

[0066] Specifically: the inner drive assembly 400 in the overall device drives the inner sphere 200 to rotate relative to the outer rotor 100 to form a controllable rotation, which drives the two groups of adjusting air chamber assemblies 300 to any direction in the pipeline, cooperates with the 360° omnidirectional scanning, completely eliminates the blind area of the traditional detection of the inner wall of the pipeline, the back of the valve, etc., ensures that the leakage point can be captured no matter where it is located in the pipeline, greatly reduces the risk of missed detection, and through the cooperation of the main light path (10.6 μm wavelength) and the reference light path (9.6 μm wavelength), the water vapor interference is removed through the differential algorithm of the water vapor characteristic analysis unit 302, the detection error of the target gas such as chlorine is greatly reduced, the misjudgment in the high humidity environment is effectively avoided, the detection result is more in line with the actual concentration, and when the detection operation is performed, the gas (containing high humidity water vapor and target gas) in the pipeline enters the first stage condensation cavity 901 through the air inlet pipeline 907, the temperature in the cavity is stabilized at 15℃ by using the first semiconductor cooler 902, when the gas flows, the water vapor reaches the dew point due to the sudden temperature drop, and condenses into liquid water droplets, which adhere to the inner wall of the first stage condensation cavity 901 (the anti-absorption coating makes the water droplets easy to slide off and not remain), and then the condensed water droplets flow along the inner wall to the bottom drain, which is collected into the quick-release water collecting cavity (the drain is provided with a one-way valve to prevent gas backflow) by gravity. This process can remove about 70% of the water vapor, and the remaining gas humidity is reduced to 40%-50%. Moreover, because the inner wall of the first stage condensation cavity 901 is coated with an anti-absorption coating, the target gas (such as chlorine) does not react with the inner wall or the condensed water, and can pass through the valve pipe 906 into the second stage condensation cavity 903 without loss. Then, when the gas enters the second stage condensation cavity 903, the remaining water vapor is further removed, and the temperature in the cavity is reduced to 5℃ by using the second semiconductor cooler, which is lower than the first stage condensation temperature, so that the remaining water vapor (especially the low dew point trace water vapor) continues to condense. At this time, the water vapor in the gas is basically removed, and the humidity is reduced to below 30%. At the same time, the condensed water droplets also flow into the water collecting cavity through the bottom drain, and combine with the first stage condensation water (the liquid level sensor of the water collecting cavity monitors the water quantity in real time, and triggers a reminder when the full scale is reached to avoid overflow). After two-stage condensation, the water vapor in the gas has been greatly reduced, and the target gas concentration is not lost due to the protection of the anti-absorption coating, laying a foundation for the third stage deep dehumidification. The two-stage condensed gas passes through the valve pipe 906 into the third stage dehumidification cavity 904 to complete the final deep dehumidification. The pore size of the nanometer porous molecular sieve 905 in the cavity of the third stage dehumidification cavity 904 is 0.3 nm, which only allows water molecules (diameter 0.27 nm) to enter the pores and be absorbed, while the target gas molecules (such as chlorine molecules with a diameter of 0.(36nm) cannot penetrate, allowing complete passage. Furthermore, the specific surface area of ​​the nanoporous molecular sieve 905 exceeds 800m² / g, resulting in a large adsorption capacity. This further reduces gas humidity from below 30% to <1%, effectively minimizing the impact of low moisture content on optical detection. During this process, the humidity sensor at the outlet of the third-stage dehumidification chamber 904 monitors the gas humidity in real time. If the humidity exceeds 1%RH due to saturation of the nanoporous molecular sieve 905, a signal is immediately sent to the microprocessor, prompting for replacement of the nanoporous molecular sieve 905. Subsequently, the dehumidified dry gas enters the mass flow controller, ensuring it reaches the detection gas. The airflow in the chamber is stable. The mass flow controller, with its built-in pressure sensor and proportional control valve, monitors the airflow pressure in real time. If pressure fluctuations exceed ±0.5 kPa (e.g., a sudden pressure surge caused by airflow impact within the pipeline), the proportional control valve automatically adjusts its opening (increasing / decreasing the flow area), stabilizing the pressure to the set range within a very short time. Then, the pressure-stabilized dry gas (humidity <1%RH, pressure ±0.5 kPa) is delivered through a pipeline to the telescopic multi-reflection chamber 301, providing a low-interference, stable-pressure detection environment for the optical detection module 304, ensuring that the laser absorption signal only reflects the target gas concentration.

[0067] The entire system removes 70% of water vapor through a first-stage condensation (15℃), reduces humidity to below 30% through a second-stage condensation (5℃), and achieves a deep adsorption of <1% through a third-stage molecular sieve (0.3nm pore size). The three stages work together to achieve a water vapor removal rate of nearly 99.5%, completely eliminating the interference of high humidity environment on optical detection. This provides a pure foundation for the accurate detection of target gases (such as chlorine) and provides an ideal environment with low interference and stable pressure for the optical detection module 304. It ensures that the laser absorption signal only reflects the concentration of the target gas, indirectly improving the accuracy of dual-optical-path differential detection and enabling the device to maintain high reliability in humid pipeline environments with fluctuating airflow.

[0068] In some embodiments, according to Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, during the operation of the aforementioned regulating air chamber assembly 300 and air chamber dehumidification assembly 900, the internal drive assembly 400 drives the regulating air chamber assembly 300 and air chamber dehumidification assembly 900 to rotate omnidirectionally around the interior of the inner sphere 200. The internal drive assembly 400 includes a servo motor 401, and the output end of the servo motor 401 is connected to a pulley structure (as shown in the attached diagram). Figure 6 As shown, the pulley structure is installed inside the square housing. The right side of the synchronous pulley at the side end of the pulley structure is rotatably connected to a gear meshing structure 402, and the left side of the synchronous pulley at the side end of the pulley structure is rotatably connected to a bevel gear meshing structure 403.

[0069] The side end of the bevel gear meshing structure 403 is provided with an electromagnetic interrupter, and the bottom output end of the bevel gear meshing structure 403 is connected with a reduction gear meshing structure 404.

[0070] The side end bottom of the reduction gear meshing structure 404 is rotationally connected with a connecting rotating rod 405, the side end of the connecting rotating rod 405 is connected with the adjusting air chamber assembly 300, the bottom of the servo motor 401 is provided with a slot frame 110, the bottom of the slot frame 110 is respectively provided with a data collector 700, a microprocessor and a early warning device 800, the side end of the gear meshing structure 402 is connected with a transmission rotating shaft rod 406, the transmission rotating shaft rod 406 is driven by the gear meshing structure 402 to make the slot frame 110 rotate synchronously, and the left and right sides of the transmission rotating shaft rod 406 penetrate through the inner sphere 200 to drive the outer rotating body 100 to rotate outside the inner sphere 200.

[0071] The surface of the outer rotating body 100 is embedded with a plurality of groups of micro guide rods 500, and the ends of the plurality of groups of micro guide rods 500 are provided with damping ends 600.

[0072] According to the contents of the embodiment, the operation mode of the inner driving assembly 400 is further specifically described: first, after the whole device enters the pipeline, the operator starts the servo motor 401 through the external signal control terminal, the power is synchronously distributed to the left and right sides through the belt pulley structure, that is, the output shaft of the servo motor 401 drives the belt pulley to rotate, the belt pulley drives the synchronous pulleys on both sides (the right side is connected with the gear meshing structure 402, and the left side is connected with the bevel gear meshing structure 403) through friction force, to realize the preliminary distribution of power. At this time, the electromagnetic interrupter can be in the conduction state, allowing the bevel gear meshing structure 403 to receive power.

[0073] Then, the right transmission branch drives the outer rotating body 100 to move along the inner wall of the pipeline, that is, the right synchronous pulley of the belt pulley drives the gear meshing structure 402 to rotate (the engagement ratio of the driving gear and the driven gear is 1:2, the rotation speed is reduced and the torque is increased), and the output end of the gear meshing structure 402 is connected with the transmission rotating shaft rod 406, the rotating shaft rod penetrates through the inner sphere 200 and is rigidly connected with the outer rotating body 100, drives the outer rotating body 100 to roll along the inner wall of the pipeline, and realizes the forward movement, backward movement or turning of the whole device.

[0074] In this moving process, the servo motor 401 adjusts the rotation speed through the pulse signal, cooperates with the pipeline diameter sensor, and makes the moving speed of the outer rotating body 100 adapt to the pipeline environment (such as fast movement in a straight pipeline and speed reduction in a curved pipeline).

[0075] At the same time, the left transmission branch drives the inner sphere 200 and the adjusting air chamber assembly 300 to rotate, realizes the adjustment of the detection angle, that is, makes the left synchronous wheel of the pulley drive the bevel gear meshing structure 403 to rotate, converts the horizontal power into the vertical direction (adapted to the radial rotation requirement of the inner sphere 200), at this time, the output end of the bevel gear meshing structure 403 is connected with the speed reduction gear meshing structure 404 (speed reduction ratio 1:5), reduces the rotation speed and increases the torque, and ensures that the outer rotating body 100 rotates smoothly in the narrow space of the pipeline.

[0076] The output end of the speed reduction gear meshing structure 404 is connected with the bogie 315 of the adjusting air chamber assembly 300 through the connecting rotating rod 405, drives the two groups of adjusting air chamber assemblies 300 to rotate synchronously with the inner sphere 200, realizes the 360° adjustment of the detection angle (such as rotating from the top of the pipeline to the bottom or rotating from the left side to the right side).

[0077] If it is necessary to fix the detection angle (such as aligning the suspected leakage point), the microprocessor sends a signal to make the electromagnetic interrupter power off, the bevel gear meshing structure 403 is locked, the power transmission is interrupted, and the air chamber dehumidification assembly 900 and the adjusting air chamber assembly 300 keep the current angle.

[0078] In the moving and rotating process of the device, the micro guide rod 500 in the annular gap cooperates with the damping end 600, so that the micro guide rod 500 drives the damping end 600 to be slightly extended, and the stability after the whole positioning is ensured, in which, the data acquisition device 700 is used to receive the moving distance of the outer rotating body 100, the rotating angle of the inner sphere 200 and the detection data of the adjusting air chamber assembly 300 in real time, and transmits them to the microprocessor, so that the microprocessor analyzes the data, if the leakage (such as the chlorine concentration exceeding the threshold value) is detected, the sound and light warning is immediately triggered by the early warning device 800, and the position and concentration information are transmitted to the remote terminal through the wireless module.

[0079] The whole device uses the servo motor 401 to synchronously divide the power to the left and right sides through the pulley structure, drives the outer rotating body 100 to move on the right side, and drives the inner sphere 200 and the adjusting air chamber assembly 300 to rotate on the left side, realizes the synchronous movement and detection of the device, solves the efficiency problem of the separation of the movement and detection of the traditional device, and greatly improves the continuity and coverage rate of the pipeline detection.

[0080] And the right side gear engagement structure 402 through the design of deceleration and torque increase, drive the rolling wheel of outer rotor 100 along the pipe wall stable movement, with the pulse speed regulation of servo motor 401 and the pipe inner diameter adaptation function, can be in straight pipe fast movement, slow down at the bend, flexible to adapt to different pipe diameter and path of the pipeline environment, and the left side bevel gear engagement structure 403 with the deceleration gear engagement structure 404, the power is converted to the vertical direction, and then converted into the circumferential rotation operation, drive the adjusting air chamber assembly 300 to realize 360° omnidirectional rotation, combined with the locking function of electromagnetic resistor, can accurately fix the detection angle (such as aligning valve interface, flange gap), completely eliminate the detection blind area in the pipeline, ensure that the leakage point can be captured no matter it is located in up, down, left and right.

[0081] The wiring diagram of the optical detection module 304, the micro laser collimator 307, the angle detection sensor 313, the data collector 700 and the early warning device 800 in the application belongs to the common knowledge in the art, and the working principle is a known technology. The model is selected according to the actual use. Therefore, the control mode and wiring arrangement of the optical detection module 304, the micro laser collimator 307, the angle detection sensor 313, the data collector 700 and the early warning device 800 are not explained in detail.

[0082] Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A real-time early warning device for toxic and harmful gas leaks, applied to the detection of leaks inside pipelines, characterized in that... include: The outer rotating body (100) is used to drive the entire device to move inside the pipe; An inner sphere (200) is rotatably disposed inside the outer rotating body (100) along the central axis of the outer rotating body (100), and an installation cavity is formed between the two inner spheres (200); The mounting cavity is equipped with an internal drive assembly (400), two sets of regulating air chamber assemblies (300) and a set of air chamber dehumidification assembly (900). One set of air chamber dehumidification assembly (900) is connected to the top of one set of regulating air chamber assembly (300). The internal drive assembly (400) is located in the mounting cavity and is used to drive the inner ball (200) to rotate relative to the outer rotating body (100), and simultaneously drive the two sets of regulating air chamber assemblies (300) and the set of air chamber dehumidification assembly (900) to form multi-directional rotation inside the inner ball (200). The regulating chamber assembly (300) includes: A telescopic multi-reflection air chamber (301) has a sliding mirror assembly (306) mounted axially on its inner wall for reflecting light. The mirror assembly (306) is connected to a driving structure (305) on its side end. The driving structure (305) drives the mirror assembly (306) to slide along the axial frame (303) inside the telescopic multi-reflection air chamber (301). The optical path of the air chamber is dynamically changed by adjusting the number of reflections. An optical detection module (304) is installed on the side of the telescopic multi-reflection air chamber (301). The optical detection module (304) includes a laser emitter and a laser receiver. The receiving ends are respectively installed at the left and right ends of the telescopic multi-reflection air chamber (301). The laser emitted by the laser emitting end is received by the laser receiving end after being reflected multiple times by the reflector group (306) in the telescopic multi-reflection air chamber (301). A miniature laser collimator (307) is installed on the other side of the telescopic multi-reflection air chamber (301). The driving structure (305) includes a micro-movement sliding sleeve (309). The micro-movement sliding sleeve (309) is slidably connected to the outside of the axial frame (303). A first miniature electromagnetic guide rod (308) is installed on the side end of the micro-movement sliding sleeve (309). A side frame (310) is installed on the side end of the micro-movement sliding sleeve (309). A micro-distance adjustment block is slidably connected inside the side end of the side frame (310). A second miniature electromagnetic guide rod (311) is installed on the side end of the telescopic multi-reflection air chamber (301). A water vapor characteristic analysis unit (302) is installed on the side end of the telescopic multi-reflection air chamber (301). A bogie (315) is mounted on the top of the side end of the micro-adjustment block. A first transmission electromagnetic rod (316) is mounted on the inner end of the bogie (315) to drive the bogie (315) to rotate in a horizontal direction. An angle detection sensor (313) is mounted on the top of the side of the bogie (315). A second transmission electromagnetic rod (312) is mounted on the side end of the angle detection sensor (313). A reflector mounting bracket (314) is rotatably connected to the inner side of the angle detection sensor (313). The second transmission electromagnetic rod (312) is used to drive the reflector mounting bracket (314) to rotate and adjust.

2. The real-time early warning device for toxic and harmful gas leaks according to claim 1, characterized in that: The regulating air chamber assembly (300) is divided into two groups, which are respectively disposed inside the inner sphere (200). The front end of one group of the regulating air chamber assembly (300) and the air chamber dehumidification assembly (900) are installed together to form the main optical path, which uses a wavelength of 10.6μm to detect the total absorption signal. The other group of the regulating air chamber assembly (300) forms the reference optical path, which uses a wavelength of 9.6μm to detect the water vapor interference signal.

3. The real-time early warning device for toxic and harmful gas leaks according to claim 1, characterized in that: An optical detection module (304) is installed on the side of the telescopic multi-reflection chamber (301). The optical detection module (304) includes a laser emitting end and a laser receiving end, which are respectively installed at the left and right ends of the telescopic multi-reflection chamber (301). The laser emitted by the laser emitting end is reflected multiple times by the reflector group (306) inside the telescopic multi-reflection chamber (301) and then received by the laser receiving end. A miniature laser collimator (307) is installed on the other side of the telescopic multi-reflection chamber (301). The driving structure ( 305) includes a micro-movement sliding sleeve (309), which is slidably connected to the outside of the axial frame (303). A first micro electromagnetic guide rod (308) is installed on the side end of the micro-movement sliding sleeve (309). A side frame (310) is installed on the side end of the micro-movement sliding sleeve (309). A micro-distance adjustment block is slidably connected inside the side end of the side frame (310). A second micro electromagnetic guide rod (311) is installed on the side end of the micro-distance adjustment block. A water vapor characteristic analysis unit (302) is installed on the side end of the telescopic multi-reflection air chamber (301).

4. The real-time early warning device for toxic and harmful gas leaks according to claim 3, characterized in that: The top of the side end of the micro-adjustment block is equipped with a bogie (315), and the inner end of the bogie (315) is equipped with a first transmission electromagnetic rod (316) for driving the bogie (315) to rotate in a horizontal direction. The top of the side of the bogie (315) is equipped with an angle detection sensor (313).

5. The real-time early warning device for toxic and harmful gas leaks according to claim 4, characterized in that: The angle detection sensor (313) is provided with a second transmission electromagnetic rod (312) on its side end. The inner side of the angle detection sensor (313) is rotatably connected to a reflector mounting bracket (314). The second transmission electromagnetic rod (312) is used to drive the reflector mounting bracket (314) to rotate and adjust.

6. The real-time early warning device for toxic and harmful gas leaks according to claim 2, characterized in that: The air chamber dehumidification assembly (900) includes: The air intake pipe (907) has its inlet end connected to the telescopic multi-reflection air chamber (301). A three-stage condensing chamber is connected to the outlet end of the intake pipe (907), and the three-stage condensing chamber includes: The first-stage condensing chamber (901) has a built-in first semiconductor cooler (902). The first semiconductor cooler (902) cools the gas entering the first-stage condensing chamber (901) to remove 70% of the water vapor. The second-stage condensing chamber (903) is connected to the side outlet of the first-stage condensing chamber (901) and has a built-in second semiconductor cooler. The second semiconductor cooler further cools the gas entering the second-stage condensing chamber (903) so that the remaining water vapor is reduced to a relative humidity of less than 30%. The third-stage dehumidification chamber (904) is connected to the side outlet of the second-stage condensation chamber (903). The first-stage condensation chamber (901), the second-stage condensation chamber (903), and the third-stage dehumidification chamber (904) are connected in sequence by valve pipes (906). The interior of the third-stage dehumidification chamber (904) is equipped with a nanoporous molecular sieve (905). The average pore size of the nanoporous molecular sieve (905) is 0.3 nm, which is used to deeply dehumidify the gas to a relative humidity of <1%.

7. The real-time early warning device for toxic and harmful gas leaks according to claim 6, characterized in that: The outlet end of the three-stage condensation chamber is connected to a mass flow controller, which is used to stabilize the airflow pressure entering the subsequent telescopic multi-reflection air chamber (301). A humidity sensor is installed inside the outlet end of the three-stage condensation chamber. The back surfaces of the first-stage condensing chamber (901) and the second-stage condensing chamber (903) are provided with drain outlets, which are connected to quick-release water collection chambers.

8. The real-time early warning device for toxic and harmful gas leaks according to claim 7, characterized in that: The internal drive assembly (400) includes a servo motor (401), the output end of which is connected to a pulley structure.

9. The real-time early warning device for toxic and harmful gas leaks according to claim 8, characterized in that: The bottom of the servo motor (401) is provided with a slot frame (110), and the bottom of the slot frame (110) is respectively provided with a data acquisition unit (700), a microprocessor and an early warning unit (800).

10. The real-time early warning device for toxic and harmful gas leaks according to claim 1, characterized in that: The outer rotating body (100) has multiple sets of micro guide rods (500) embedded in its surface, and the ends of the multiple sets of micro guide rods (500) are provided with damping ends (600).

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