Gas diffusion monitoring device and method in power channel based on slope adjustment

Abstract

The device and method for monitoring gas diffusion in an electric channel based on slope adjustment belong to the technical field of gas diffusion monitoring and solve the problem of how to monitor the gas diffusion law in an electric channel under different slope conditions. The present invention utilizes an electric channel module to simulate the actual electric channel structure, utilizes a gas leakage module to simulate the diffusion of gas into the electric channel through a leakage point, utilizes a slope adjustment module to raise the electric channel module and adjust the slope of the electric channel module, utilizes a sensor module to capture the gas concentration along the slope and against the slope on both sides of the leakage point under different slope conditions, and analyzes the diffusion of gas under different slopes in real time. Utilizes a data acquisition and analysis module to analyze the gas diffusion path and law, and issues early warnings for dangerous points of gas diffusion under different slope conditions, thereby providing theoretical support for the optimal installation position of the sensor and optimizing the coverage of sensor monitoring.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas diffusion monitoring, and relates to a device and method for monitoring gas diffusion in a power channel based on slope adjustment. Background Art

[0002] In modern urban underground pipe networks, gas and power pipelines are often laid parallel or adjacent to each other due to space constraints. While both pipeline systems adhere to strict safety regulations during design and construction, the flammable and explosive nature of gas and the high voltage risks inherent in power pipelines create a potential coupling risk between gas pipeline leaks and the power pipeline system. When gas leaks into power pipelines, it can accumulate within the electrical pathways. If power equipment malfunctions or arcing occurs at this point, this can easily trigger a gas explosion, leading to serious safety incidents.

[0003] Existing technologies, such as the invention patent with application publication number CN113947325A, disclose a risk simulation test bench for coupling power cable channels with municipal gas pipelines. The test bench automatically samples the parameters of combustible gases leaking in the soil and channels through gas sensors and gas sampling sensors, simulating the diffusion and accumulation process of gas in power cable channels under different soil conditions and other working conditions, thereby providing technical support for the prevention and disposal of natural gas pipeline leakage accidents.

[0004] Existing gas leak monitoring systems often rely on fixed-position sensors and fail to account for the diffusion of gas within power corridors. These sensor placements cannot adequately address the complex terrain variations within power corridors, particularly those with varying slopes or irregular terrain. This makes the gas diffusion path difficult to predict, leading to blind spots in some monitoring areas or the inability to detect gas leaks in real time. Due to the inability to fully predict the gas diffusion path, traditional monitoring equipment placement is often based on experience rather than scientific analysis, resulting in irrational sensor placement and a failure to effectively cover all possible gas leak areas. This irrational equipment layout can easily lead to delayed or missed gas leak detection, increasing safety risks.

[0005] Furthermore, the diffusion of gas in power transmission lines is influenced by a variety of factors, including the channel's slope, structure, and gas leakage pressure. The resulting diffusion pattern is difficult to predict. In practice, power transmission lines and gas pipelines are often located in complex underground environments with uneven pipeline slopes. Traditional fixed-point monitoring systems struggle to fully cover all potential leakage areas. This is especially true after gas enters the power pipeline. Existing gas monitoring devices often struggle to determine the diffusion rate and concentration changes of the leak in real time, resulting in low gas leak monitoring accuracy and significant damage to the power system. Summary of the Invention

[0006] The technical solution of the present invention is used to solve the problem of how to monitor the diffusion law of gas in a power channel under different slope conditions.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A gas diffusion monitoring device in a power channel based on slope adjustment includes a power channel module, a gas leakage module, a slope adjustment module, a sensor module, and a data acquisition and analysis module;

[0009] The power channel module includes a cable trench, a power well, and a power pipeline; a plurality of the cable trenches are connected in sequence, the power pipeline is laid in the cable trench, and both ends of the power well are connected to the cable trench;

[0010] The gas leakage module includes a high-pressure gas storage tank, a gas pipeline, a check valve, a flow regulating valve and a leakage point; the high-pressure gas storage tank, the check valve, the flow regulating valve and the leakage point are sequentially connected through the gas pipeline, and the leakage point is set at the bottom of the power channel module;

[0011] The slope adjustment module includes a support frame, a drive assembly, and an adjustment assembly; the top of the support frame is fixedly connected to the bottom of the power channel module, the adjustment assembly is movably connected to the bottom of the support frame, and the output end of the drive assembly is movably connected to the adjustment assembly to drive the adjustment assembly to lift the power channel module and adjust the slope of the power channel module;

[0012] The sensor module includes a sensor array disposed in the power channel module; a plurality of the sensor arrays are symmetrically arranged on both sides of the leakage point, and the sensor array includes gas sensors uniformly distributed along the height direction of the power channel;

[0013] The data acquisition and analysis module includes a data acquisition unit, an information synchronizer, a camera, a visual window and a laser sheet light source; the input end of the data acquisition unit is respectively connected to the output ends of multiple sensors, the input end of the data acquisition unit is connected to the input end of the information synchronizer, the input end of the information synchronizer is connected to the common connection point of the flow control valve and the check valve, the output end of the information synchronizer is connected to the laser sheet light source, tracer particles are arranged inside the power channel module, and a visual window is arranged on the outside of the power channel module, and the camera records the movement trajectory of the tracer particles through the visual window.

[0014] Furthermore, the driving assembly includes a base, a hydraulic solenoid valve and a driving gear; the fixed end of the hydraulic solenoid valve is fixedly connected to the base, and the movable end of the hydraulic solenoid valve is rotationally connected to the driving gear.

[0015] Furthermore, the adjustment assembly includes a movable rack, a bottom plate, a movable plate, an upper support plate, a first lifting arm, a second lifting arm, a third lifting arm and a fourth lifting arm; the first lifting arm and the second lifting arm are symmetrically arranged, and the third lifting arm and the fourth lifting arm are symmetrically arranged; the bottom plate is fixedly connected to the bottom of the support frame, and a movable slot is provided on one side of the bottom plate, the movable rack is slidably arranged in the movable slot, one end of the movable rack is meshed with the driving gear, the other end of the movable rack is hinged to the bottom of the first lifting arm, and the bottom of the second lifting arm is hinged to the other side of the base; one side of the movable plate is hinged to the top of the first lifting arm, and the other side of the movable plate is provided with a slide slot, the top of the second lifting arm is slidably arranged in the slide slot, and the bottom of the third lifting arm is hinged to the top of the second lifting arm; the bottom of the fourth lifting arm is hinged to the side of the movable plate away from the slide slot; one side of the upper support plate is hinged to the top of the third lifting arm, and the other side of the upper support plate is provided with a slide slot, and the top of the fourth lifting arm is slidably arranged in the slide slot.

[0016] Furthermore, it also includes a pipe fitting; the pipe fitting is used to connect multiple power channel modules, and the pipe fitting is an L-shaped pipe fitting or a T-shaped pipe fitting.

[0017] The present invention also provides a method for monitoring gas diffusion in a power channel based on slope adjustment, comprising the following steps:

[0018] S1. Using a sensor module to collect real-time gas concentrations on both sides of the leak point, and determining the gas diffusion direction on both sides of the leak point; wherein, when the response speed of the sensor array on one side of the leak point is higher than the response speed of the sensor array on the other side of the leak point, it is determined that the gas diffusion direction on one side of the leak point is downslope diffusion, and the gas diffusion direction on the other side of the leak point is counterslope diffusion;

[0019] S2. Continuously collect the real-time gas concentration from the sensor on the reverse slope side to determine the feasibility of continuous reverse diffusion of the gas. If the gas cannot continuously diffuse in the reverse direction, record the diffusion boundary and gas concentration on the reverse slope side. If the gas can continuously diffuse in the reverse direction, execute step S3 to calculate the gas diffusion rate for reverse diffusion.

[0020] S3. Record the response time and spacing of adjacent sensor arrays respectively, and calculate the gas diffusion rate of down-slope diffusion and down-slope diffusion respectively;

[0021] S4. Adjust the slope of the power channel using the slope adjustment module, adjust the gas leakage in the power channel using the gas leakage module, revise the adjusted gas diffusion coefficient, and update the gas diffusion rates for both the down-slope diffusion and the down-slope diffusion.

[0022] S5. Establish a data set for revising the gas diffusion coefficient, fit the correlation between the gas diffusion direction, leakage amount and slope, and establish a gas diffusion prediction model.

[0023] Furthermore, the following formula is used in S3 to calculate the gas diffusion rate along the slope:

[0024]

[0025] Where V diff1 represents the gas diffusion rate along the slope, Δx represents the spacing between adjacent sensor arrays along the slope, and Δt1 represents the difference in response time between adjacent sensor arrays along the slope;

[0026] The gas diffusion rate of the reverse slope diffusion is calculated using the following formula:

[0027]

[0028] Where V diff2 represents the gas diffusion rate of the upslope diffusion, Δy represents the spacing between adjacent sensor arrays on the upslope side, and Δt2 represents the difference in response time between adjacent sensor arrays on the upslope side.

[0029] Furthermore, the adjusted leakage diffusion coefficient is revised using the following formula in S4:

[0030] k(Q)=k0*(1+γθQ)

[0031] Where k(Q) represents the leakage diffusion coefficient, k0 represents the reference leakage diffusion coefficient, γ represents the leakage adjustment parameter, and Q represents the gas leakage.

[0032] Furthermore, the adjusted downslope diffusion coefficient is revised using the following formula in S4:

[0033] A(θ)=A0*[1+αsin(θ)]

[0034] Where A(θ) represents the downslope diffusion coefficient, A0 represents the baseline downslope diffusion coefficient, α represents the downslope diffusion adjustment parameter, and θ represents the slope of the power channel.

[0035] Furthermore, the adjusted inverse slope diffusion coefficient is revised using the following formula in S4:

[0036] B(θ)=B0*[1-βsin(θ)]

[0037] Where B(θ) represents the reverse slope diffusion coefficient, B0 represents the baseline reverse slope diffusion coefficient, and β represents the reverse slope diffusion adjustment parameter.

[0038] Furthermore, the following formula is used in S4 to update the gas diffusion rate along the slope:

[0039] V′ diff1 =A(θ)*k(Q)*Q*cos(θ)*V diff1

[0040] Where V′ diff1 represents the gas diffusion rate along the slope after the update;

[0041] The gas diffusion rate for reverse-slope diffusion is updated using the following formula:

[0042] V′ diff2 =B(θ)*k(Q)*Q*cos(θ)*V′ diff2

[0043] Where V′ diff2 Indicates the gas diffusion rate of the updated reverse slope diffusion.

[0044] The advantages of the present invention are:

[0045] (1) The present invention utilizes an electric channel module to simulate the actual electric channel structure, utilizes a gas leakage module to simulate the diffusion of gas into the electric channel through a leakage point, utilizes a slope adjustment module to elevate the electric channel module and adjust the slope of the electric channel module, utilizes a sensor module to capture the gas concentration along the slope and against the slope on both sides of the leakage point under different slope conditions, and analyzes the diffusion boundary and rate of gas under different slopes in real time, utilizes a data acquisition and analysis module to analyze the gas diffusion path and law, and issues early warnings for dangerous points of gas diffusion under different slope conditions, thereby providing theoretical support for the optimal installation position of the sensor and optimizing the coverage of sensor monitoring to adapt to different gas diffusion simulation experimental scenarios in electric channels.

[0046] (2) The present invention controls the gas leakage rate and flow rate through the flow regulating valve to ensure the controllability of the leakage scenario in the experimental environment, and prevents gas backflow through the check valve to ensure the safety of the experiment.

[0047] (3) The present invention uses a driving component to control the lifting height of the adjustment component. The hydraulic solenoid valve drives the gear to engage and rotate with the movable rack. The movable rack slides in the movable slot of the bottom plate, driving the first lifting arm to lift the movable plate. When the movable plate moves away from the bottom plate, the second lifting arm slides in the slide slot and plays a role of supporting the movable plate, and drives the third lifting arm hinged to the second lifting arm. The third lifting arm lifts the upper support plate. When the upper support plate moves away from the movable plate, the fourth lifting arm slides in the slide slot and plays a role of supporting the movable plate, thereby realizing the slope adjustment of the power channel to meet the test requirements of different terrains. The slope of the power channel is adjusted by hydraulic pressure, which has the characteristics of high precision and smooth process, ensuring the controllability of the slope change during the simulation process. The device can adjust the slope continuously or in stages according to actual test requirements, which is convenient for observing different trends of gas diffusion and has the advantage of repeatable operation.

[0048] (4) The present invention utilizes pipes of different shapes to connect multiple power channel modules, and realizes the structural change of the entire power channel by splicing. It can splice a power channel that meets the experimental simulation requirements according to working conditions and scenarios, and has good practicality.

[0049] (5) The present invention takes into account the influence of the slope of the power channel in a complex environment, uses the sensor module to collect the real-time gas concentration on both sides of the leakage point, judges the gas diffusion direction on both sides of the leakage point, and continuously collects the real-time gas concentration of the sensor on the reverse slope side to judge the feasibility of continuous reverse diffusion of the gas. If the reverse slope side cannot continuously diffuse in the reverse direction, the diffusion boundary and gas concentration on the reverse slope side are recorded, and the maximum value of the dangerous boundary and the maximum concentration that the gas reverse diffusion can reach under this slope condition are recorded, providing a theoretical basis and technical support for the layout of the gas monitoring equipment installed in the power channel, and optimizing the installation position of the sensor on the reverse slope side and the coverage of the sensor monitoring.

[0050] (6) The present invention studies the relationship between the response time of the sensor array on different sides of the leakage point in the power channel and the gas diffusion rate, uses the driving component to adjust the slope of the power channel, uses the flow control valve to adjust the gas leakage amount injected into the power channel, and adjusts it to the specified value according to the experimental working conditions to simulate the gas leakage in the power channel under different terrain conditions. In actual application, the gas concentration data on both sides of the leakage point are collected by the sensor module, the adjustment parameters γ, α, β in the model are fitted, and the reference diffusion coefficients A0 and B0 are adjusted, so that the model can more accurately study the gas diffusion behavior in the power channel under different leakage amounts and slope conditions, and can be used to predict the gas diffusion rate in similar situations, which is conducive to in-depth analysis of the potential risk factors brought about by the diffusion of gas in the power channel and the complex interactions between the factors. It provides a scientific and reliable theoretical basis for the research on gas leakage monitoring in complex environments and has good guiding significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is an overall diagram of a gas diffusion monitoring device in a power channel based on slope adjustment according to the first embodiment of the present invention;

[0052] Figure 2 This is a structural diagram of a gas diffusion monitoring device in a power channel based on slope adjustment according to a first embodiment of the present invention;

[0053] FIG3( a ) is a front structural diagram of a slope adjustment module according to a first embodiment of the present invention;

[0054] FIG3( b ) is a rear structural diagram of the slope adjustment module according to the first embodiment of the present invention;

[0055] Figure 4 is a schematic diagram of a sensor module according to a first embodiment of the present invention;

[0056] FIG5( a ) is a schematic diagram of a T-shaped pipe fitting according to a first embodiment of the present invention;

[0057] FIG5( b ) is a schematic diagram of an L-shaped pipe fitting according to Embodiment 1 of the present invention;

[0058] Figure 6 This is a flow chart of a method for monitoring gas diffusion in a power channel based on slope adjustment according to a second embodiment of the present invention;

[0059] Reference numerals: 11, cable trench; 12, power well;

[0060] 21. High-pressure gas storage tank; 22. Gas pipeline; 23. Check valve; 24. Flow control valve; 25. Leakage point;

[0061] 31. Support frame; 321. Base; 322. Hydraulic solenoid valve; 323. Driving gear; 331. Movable rack; 332. Bottom plate; 333. Movable plate; 334. Upper support plate; 335. First lifting arm; 336. Second lifting arm; 337. Third lifting arm; 338. Fourth lifting arm;

[0062] 41. Sensor array; 51. Visual window; 52. Camera; 53. Information synchronizer; 54. Data acquisition system; 55. Laser sheet light source;

[0063] 61. Pipe fittings. DETAILED DESCRIPTION

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0065] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0066] Example 1

[0067] like Figure 1-2 As shown, specifically, a gas diffusion monitoring device in a power channel based on slope adjustment is disclosed, comprising a power channel module, a gas leakage module, a slope adjustment module, a sensor module and a data acquisition and analysis module;

[0068] The power channel module includes a cable trench 11, a power well 12, and a power pipeline; multiple cable trenches 11 are connected in sequence, the power pipeline is laid in the cable trench 11, and both ends of the power well 12 are connected to the cable trench 11;

[0069] Furthermore, the cable trenches 11 are sealed by rubber rings or welding; mesh covers are provided at both ends of the power well 12 to prevent interference from external airflow.

[0070] In this embodiment, the power channel module is used to simulate the structure of an actual power channel. The power channel is constructed from common materials used in actual field applications, such as PVC or metal, to meet the requirements for high-temperature and corrosion resistance. The power channel module can be composed of multiple cable trenches 11 and power wells 12, depending on testing requirements. The power channel's geometric dimensions can be adjusted to suit different gas diffusion simulation scenarios within the power channel.

[0071] like Figure 1-2 As shown, the gas leakage module includes a high-pressure gas storage tank 21, a gas pipeline 22, a check valve 23, a flow regulating valve 24 and a leakage point 25; the high-pressure gas storage tank 21, the check valve 23, the flow regulating valve 24 and the leakage point 25 are sequentially connected through the gas pipeline 22, and the leakage point 25 is set at the bottom of the power channel module;

[0072] Furthermore, after the multiple leakage points 25 are connected in series with the flow regulating valve 24, the non-series ends of the multiple flow regulating valves 24 are connected to one end of the check valve 23 through the gas pipeline 22, and the other end of the check valve 23 is connected to the output end of the high-pressure gas storage tank 21, and the multiple leakage points 25 are individually controlled by the flow regulating valve 24.

[0073] In this embodiment, the gas leakage module is used to simulate a gas leak at a specific location (i.e., the location of the leak point 25). The high-pressure gas storage tank 21 contains a mixed gas and nitrogen that meets the pressure regulation requirements. The gas pipeline 22 is connected through the reserved opening of the power channel (i.e., the leak point 25) to simulate the diffusion of gas from the leak point 25 to the power channel. This embodiment uses the flow control valve 24 to control the gas leakage rate and flow rate to ensure the controllability of the leakage scenario in the experimental environment. The leak point 25 is used to simulate the leakage of various gases (such as natural gas, coal gas, etc.). When the gas leakage simulation stops or an accident occurs, the flow control valve 24 is turned off to block the high-pressure gas storage tank 21 from delivering gas to the power channel. At the same time, the check valve 23 can prevent gas backflow to ensure the safety of the experiment.

[0074] As shown in Figures 3(a) and 3(b), the slope adjustment module includes a support frame 31, a drive assembly, and an adjustment assembly; the top of the support frame 31 is fixedly connected to the bottom of the power channel module, the adjustment assembly is movably connected to the bottom of the support frame 31, and the output end of the drive assembly is movably connected to the adjustment assembly to drive the adjustment assembly to raise the power channel module and adjust the slope of the power channel module;

[0075] The driving assembly includes a base 321, a hydraulic solenoid valve 322 and a driving gear 323; the fixed end of the hydraulic solenoid valve 322 is fixedly connected to the base 321, and the movable end of the hydraulic solenoid valve 322 is rotatably connected to the driving gear 323;

[0076] The adjustment assembly includes a movable rack 331, a bottom plate 332, a movable plate 333, an upper support plate 334, a first lifting arm 335, a second lifting arm 336, a third lifting arm 337, and a fourth lifting arm 338; the first lifting arm 335 is symmetrically arranged with the second lifting arm 336, and the third lifting arm 337 is symmetrically arranged with the fourth lifting arm 338;

[0077] The bottom plate 332 is fixedly connected to the bottom of the support frame 31. A movable slot is provided on one side of the bottom plate 332. The movable rack 331 is slidably provided in the movable slot. One end of the movable rack 331 is meshed with the driving gear 323. The other end of the movable rack 331 is hinged to the bottom of the first lifting arm 335. The bottom of the second lifting arm 336 is hinged to the other side of the base 321.

[0078] One side of the movable plate 333 is hinged to the top of the first lifting arm 335. A slide groove is provided on the other side of the movable plate 333. The top of the second lifting arm 336 slides in the slide groove. The bottom of the third lifting arm 337 is hinged to the top of the second lifting arm 336. The bottom of the fourth lifting arm 338 is hinged to the side of the movable plate 333 away from the slide groove.

[0079] One side of the upper supporting plate 334 is hinged to the top of the third lifting arm 337 , and the other side of the upper supporting plate 334 is provided with a sliding groove, and the top of the fourth lifting arm 338 is slidably set in the sliding groove.

[0080] In this embodiment, the slope adjustment module is used to simulate the gas diffusion behavior of the power channel under different terrain conditions. The driving component is used to control the lifting height of the adjustment component. The hydraulic solenoid valve 322 drives the gear 323 to engage and rotate with the movable rack 331. The movable rack 331 slides in the movable slot of the bottom plate 332, driving the first lifting arm 335 to lift the movable plate 333. When the movable plate 333 moves away from the bottom plate 332, the second lifting arm 336 slides in the slide slot and plays a role in supporting the movable plate 333, and drives the third lifting arm 336 hinged to the second lifting arm 336. The lifting arm 337 and the third lifting arm 337 lift the upper support plate 334. When the upper support plate 334 moves away from the movable plate 333, the fourth lifting arm 338 slides in the slide groove and supports the movable plate 333, thereby realizing the slope adjustment of the power channel to meet the testing requirements of different terrains. The slope of the power channel is adjusted by hydraulics, which has the characteristics of high precision and smooth process, ensuring the controllability of the slope change during the simulation process. The device can adjust the slope continuously or in stages according to actual test requirements, which is convenient for observing different trends of gas diffusion and has the advantage of repeatable operation.

[0081] like Figure 4 As shown, the sensor module includes a sensor array 41 provided in the power channel module; a plurality of the sensor arrays 41 are symmetrically arranged on both sides of the leakage point 25, and the sensor array 41 includes gas sensors uniformly distributed along the height direction of the power channel;

[0082] by Figure 4 For example, the leakage point 25H is set at the bottom of the power channel module, and a sensor array 41S1, S2, and S3 are set on one side of the leakage point 25. The sensor array 41S1 has gas sensors S11, S12, and S13 evenly distributed along the height direction of the power channel; the other end of the leakage point 25 is set with a sensor array 41F1, F2, and F3, and the sensor array 41F1 is symmetrically arranged with the sensor S1.

[0083] In this embodiment, the sensor module is used to collect real-time gas concentration within the power channel. The sensor's sensitivity should meet the minimum concentration required to detect trace gas leaks. By placing multiple sensor arrays 41 on either side of the leak point 25, the sensor captures both the up-slope and down-slope gas concentrations on both sides of the leak point 25 under certain slope conditions, enabling real-time analysis of gas diffusion at different slopes. After data analysis, the position of the sensor arrays 41 is optimized based on the slope adjustment and analysis of gas diffusion patterns. This provides theoretical basis and technical support for the layout of gas monitoring equipment within the power channel, ensuring comprehensive and accurate gas monitoring coverage.

[0084] like Figure 2 As shown, the data acquisition and analysis module includes a data acquisition unit, an information synchronizer 53, a camera 52, a visual window 51 and a laser sheet light source 55; the input end of the data acquisition unit is respectively connected to the output ends of multiple sensors, the input end of the data acquisition unit is connected to the input end of the information synchronizer 53, the input end of the information synchronizer 53 is connected to the common connection point of the flow control valve 24 and the check valve 23, the output end of the information synchronizer 53 is connected to the laser sheet light source 55, tracer particles are arranged inside the power channel module, and a visual window 51 is arranged on the outside of the power channel module, and the camera 52 records the movement trajectory of the tracer particles through the visual window 51.

[0085] In this embodiment, the data acquisition and analysis module is used to receive gas concentration data collected by the sensor module and analyze gas diffusion behavior. Connected to the control system, the module uses recorded gas concentration data over time and space to generate diffusion trend charts, providing a scientific basis for optimizing the placement of gas monitoring sensors. The module provides gas leak warning and historical data backtracking capabilities, enabling gas leak prediction and risk assessment. Furthermore, based on data fed back by the module, the control system analyzes gas diffusion paths and patterns, issues warnings for dangerous gas diffusion points under different slope conditions, and provides theoretical support for optimal sensor installation locations, optimizing sensor monitoring coverage.

[0086] The data acquisition module converts the collected information into digital signals and uses signal processing technology to output standardized data according to a specific protocol. Based on the output standardized data, the information synchronizer 53 collaborates with the camera 52, flow control valve 24, and laser sheet light source 55. The laser sheet light source 55 visualizes the distribution and movement of tracer particles within the power channel as they diffuse along with the gas, and records the gas diffusion process via the camera.

[0087] Furthermore, as shown in Figures 5(a) and 5(b), the present invention provides a gas diffusion monitoring device in an electric power channel based on slope adjustment, which also includes a pipe fitting 61; the pipe fitting 61 is used to connect multiple electric power channel modules, and the pipe fitting 61 is an L-shaped pipe fitting 61 or a T-shaped pipe fitting 61.

[0088] Taking the T-shaped power channel formed by splicing T-shaped pipe fittings 61 as an example, when the gas diffuses in the T-shaped power channel, when the gas diffuses in two directions at the fork of the power channel, the gas diffusion rate will decrease, or the gas will gather in a certain direction. The above-mentioned simulation scenario can be constructed using T-shaped pipe fittings, and monitoring data can be obtained through the sensor module to analyze the impact of the T-shaped power channel on the diffusion and aggregation of gas.

[0089] In this embodiment, pipe fittings 61 of different shapes can connect multiple power channel modules, and the structural changes of the entire power channel can be achieved by splicing. Power channels that meet experimental simulation requirements can be spliced ​​according to working conditions and scene requirements, which facilitates the analysis of the impact of power channels with different structures and shapes on gas diffusion and aggregation, and has good practicality.

[0090] Example 2

[0091] like Figure 6 As shown, the present invention also provides a method for monitoring gas diffusion in a power channel based on slope adjustment, comprising the following steps:

[0092] S1. Use the sensor module to collect the real-time gas concentration on both sides of the leak point and determine the gas diffusion direction on both sides of the leak point;

[0093] Specifically, when the response speed of the sensor array on one side of the leak point is higher than the response speed of the sensor array on the other side of the leak point, it is determined that the gas diffusion direction on the leak point is downslope diffusion, and the gas diffusion direction on the other side of the leak point is counterslope diffusion;

[0094] In this embodiment, since the power channel often has a certain slope in a complex environment, when the gas diffuses from the leakage point into the power channel, it cannot be guaranteed to diffuse evenly on both sides. When the gas has a slope, the diffusion conditions of the gas on both sides of the power channel are different. The real-time gas concentration is collected by using sensor arrays arranged on both sides of the leakage point. According to the sensor response, it can be determined whether the current sensor array is located on the side with the slope or the side against the slope of the leakage point, and whether the gas diffuses along the slope or against the slope at the current sensor array position.

[0095] S2. Continuously collect the real-time gas concentration of the sensor on the reverse slope side to determine the feasibility of continuous reverse diffusion of gas;

[0096] Specifically, real-time gas concentration data from the sensor on the reverse slope side is continuously collected to determine whether the gas can continue to diffuse in the reverse direction. If the gas cannot continue to diffuse in the reverse direction, the diffusion boundary and gas concentration on the reverse slope side are recorded. If the gas can continue to diffuse in the reverse direction, step S3 is executed to calculate the gas diffusion rate of the reverse slope diffusion.

[0097] Specifically, if the multiple sensor arrays located on the reverse slope side respond continuously over time, it means that the reverse slope side can continue to diffuse in the reverse direction; if the multiple sensor arrays located on the reverse slope side do not respond or the gas concentration data that changes over time remains unchanged, it means that the reverse slope side cannot continue to diffuse in the reverse direction, then the diffusion boundary and gas concentration on the reverse slope side are recorded, and the maximum value of the dangerous boundary and the maximum concentration that the gas reverse diffusion can reach under this slope condition are recorded, providing a theoretical basis and technical support for the layout of the gas monitoring equipment installed in the power channel, and optimizing the installation position of the sensor on the reverse slope side and the coverage of the sensor monitoring.

[0098] S3. Record the response time and spacing of adjacent sensor arrays respectively, and calculate the gas diffusion rate of down-slope diffusion and down-slope diffusion respectively;

[0099] The gas diffusion rate along the slope is calculated using the following formula:

[0100]

[0101] Where V diff1 represents the gas diffusion rate along the slope, Δx represents the spacing between adjacent sensor arrays along the slope, and Δt1 represents the difference in response time between adjacent sensor arrays along the slope, that is, the time difference between the gas reaching the adjacent sensor arrays along the slope.

[0102] The gas diffusion rate of the reverse slope diffusion is calculated using the following formula:

[0103]

[0104] Where V diff2 represents the gas diffusion rate of the upslope diffusion, Δy represents the spacing between adjacent sensor arrays on the upslope side, and Δt2 represents the difference in response time of adjacent sensor arrays on the upslope side, that is, the time difference for the gas to reach the adjacent sensor arrays on the upslope side.

[0105] The above formula can clearly express the relationship between the response time of the sensor arrays on different sides and the gas diffusion rate. In particular, in an actual inclined power channel with a slope, the gas diffusion rate will change due to factors such as the inclination angle and airflow convection.

[0106] Furthermore, this embodiment can fit a more accurate gas diffusion rate model by combining the gas diffusion rates calculated by multiple adjacent sensor arrays.

[0107] S4. Adjusting the slope of the power channel using the slope adjustment module, adjusting the amount of gas leakage in the power channel using the gas leakage module, revising the adjusted gas diffusion coefficient, and updating the gas diffusion rates for both down-slope diffusion and down-slope diffusion, respectively; the gas diffusion coefficients include the leakage diffusion coefficient, the down-slope diffusion coefficient, and the down-slope diffusion coefficient.

[0108] In this embodiment, the driving component is used to adjust the slope of the power channel, and the flow control valve is used to adjust the leakage amount of gas injected into the power channel. The value is adjusted to a specified value according to the experimental working conditions to simulate the gas leakage in the power channel under different terrain conditions.

[0109] S41. In order to more accurately express the relationship between the gas diffusion rate, leakage rate, and slope, the adjusted leakage diffusion coefficient is revised using the following formula:

[0110] k(Q)=k0*(1+γQ)

[0111] Where k(Q) represents the leakage diffusion coefficient, k0 represents the baseline leakage diffusion coefficient, γ represents the leakage adjustment parameter, which reflects the impact of leakage on the gas diffusion rate, and Q represents the gas leakage.

[0112] In this embodiment, the diffusion behavior of the gas is closely related to the gas concentration, and thus to the gas leakage amount. According to the above formula, when the gas leakage amount Q increases, the leakage diffusion coefficient k(Q) also increases. The gas diffusion rate shows a nonlinear growth relationship with the increase in leakage amount. The leakage adjustment parameter γ determines the amplifying effect of the leakage increase on the gas diffusion rate.

[0113] S42. Revise the adjusted downslope diffusion coefficient using the following formula:

[0114] A(θ)=A0*[1+αsin(θ)]

[0115] Where A(θ) represents the down-slope diffusion coefficient, A0 represents the benchmark down-slope diffusion coefficient, α represents the down-slope diffusion adjustment parameter, which reflects the effect of the slope on the down-slope diffusion rate of the gas, and θ represents the slope of the power channel.

[0116] In this embodiment, taking into account the different diffusion states of the gas on the upslope side and the downslope side, when the slope θ of the power channel is larger, it means that the slope of the power channel is steeper, the upslope diffusion coefficient A(θ) is larger, and the downslope gas diffusion rate is faster.

[0117] S43. Revise the adjusted inverse slope diffusion coefficient using the following formula:

[0118] B(θ)=B0*[1-βsin(θ)]

[0119] Where B(θ) represents the reverse slope diffusion coefficient, B0 represents the benchmark reverse slope diffusion coefficient, β represents the reverse slope diffusion adjustment parameter, which reflects the obstruction of the slope on the reverse slope diffusion, and θ represents the slope of the power channel. When the slope θ of the power channel is larger, the slope of the power channel is steeper, and the reverse slope diffusion of gas is more strongly obstructed.

[0120] S44. Update the gas diffusion rate along the slope using the following formula:

[0121] V′ diff1 =A(θ)*k(Q)*Q*cos(θ)*V diff1

[0122] Where V′ diff1 It represents the updated gas diffusion rate along the slope. By measuring the response time Δt1 and spacing Δx of adjacent sensor arrays along the slope, combined with the adjusted slope θ and leakage Q, the variation law of the gas diffusion rate on the along-slope side is corrected.

[0123] S45. Update the gas diffusion rate of the reverse-slope diffusion using the following formula:

[0124] V′ diff2 =B(θ)*k(Q)*Q*cos(θ)*V diff2

[0125] Where V′ diff2 The updated gas diffusion rate of the upslope diffusion is expressed by measuring the response time Δt2 and spacing Δy of adjacent sensor arrays on the upslope side, combined with the adjusted slope θ and leakage amount Q to correct the change law of the gas diffusion rate on the upslope side.

[0126] S5. Establish a data set for revising the gas diffusion coefficient, fit the correlation between the gas diffusion direction, leakage amount, and slope, and establish a gas diffusion prediction model;

[0127] Specifically, in practical applications, the sensor module collects gas concentration data on both sides of the leakage point, fits the adjustment parameters γ, α, and β in the model, and adjusts the baseline diffusion coefficients A0 and B0. This enables the model to more accurately study the gas diffusion behavior in the power channel under different leakage amounts and slope conditions, and can further be used to predict the gas diffusion rate in similar situations.

[0128] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gas diffusion monitoring device in a power channel based on slope adjustment, characterized in that: It includes power channel module, gas leakage module, slope adjustment module, sensor module and data acquisition and analysis module; The power channel module includes a cable trench, a power well, and a power pipeline; a plurality of the cable trenches are connected in sequence, the power pipeline is laid in the cable trench, and both ends of the power well are connected to the cable trench; The gas leakage module includes a high-pressure gas storage tank, a gas pipeline, a check valve, a flow regulating valve and a leakage point; the high-pressure gas storage tank, the check valve, the flow regulating valve and the leakage point are sequentially connected through the gas pipeline, and the leakage point is set at the bottom of the power channel module; The slope adjustment module includes a support frame, a drive assembly, and an adjustment assembly; the top of the support frame is fixedly connected to the bottom of the power channel module, the adjustment assembly is movably connected to the bottom of the support frame, and the output end of the drive assembly is movably connected to the adjustment assembly to drive the adjustment assembly to lift the power channel module and adjust the slope of the power channel module; The sensor module includes a sensor array disposed in the power channel module; a plurality of the sensor arrays are symmetrically arranged on both sides of the leakage point, and the sensor array includes gas sensors uniformly distributed along the height direction of the power channel; The data acquisition and analysis module includes a data acquisition unit, an information synchronizer, a camera, a visual window and a laser sheet light source; the input end of the data acquisition unit is respectively connected to the output ends of multiple sensors, the input end of the data acquisition unit is connected to the input end of the information synchronizer, the input end of the information synchronizer is connected to the common connection point of the flow control valve and the check valve, the output end of the information synchronizer is connected to the laser sheet light source, tracer particles are arranged inside the power channel module, and a visual window is arranged on the outside of the power channel module, and the camera records the movement trajectory of the tracer particles through the visual window.

2. The device for monitoring gas diffusion in a power channel based on slope adjustment according to claim 1, characterized in that: The driving assembly includes a base, a hydraulic solenoid valve and a driving gear; the fixed end of the hydraulic solenoid valve is fixedly connected to the base, and the movable end of the hydraulic solenoid valve is rotationally connected to the driving gear.

3. The device for monitoring gas diffusion in a power channel based on slope adjustment according to claim 1, characterized in that: The adjustment assembly includes a movable rack, a bottom plate, a movable plate, an upper support plate, a first lifting arm, a second lifting arm, a third lifting arm and a fourth lifting arm; the first lifting arm is symmetrically arranged with the second lifting arm, and the third lifting arm is symmetrically arranged with the fourth lifting arm; The bottom plate is fixedly connected to the bottom of the support frame, and a movable slot is provided on one side of the bottom plate. The movable rack is slidably provided in the movable slot. One end of the movable rack is meshed with the driving gear, and the other end of the movable rack is hinged to the bottom of the first lifting arm. The bottom of the second lifting arm is hinged to the other side of the base. One side of the movable plate is hinged to the top of the first lifting arm, and a slide groove is provided on the other side of the movable plate. The top of the second lifting arm is slidably arranged in the slide groove. The bottom of the third lifting arm is hinged to the top of the second lifting arm. The bottom of the fourth lifting arm is hinged to the side of the movable plate away from the slide groove. One side of the upper supporting plate is hinged to the top of the third lifting arm, and the other side of the upper supporting plate is provided with a sliding groove, and the top of the fourth lifting arm is slidably arranged in the sliding groove.

4. The device for monitoring gas diffusion in a power channel based on slope adjustment according to claim 1, characterized in that: It also includes pipe fittings; the pipe fittings are used to connect multiple power channel modules, and the pipe fittings are L-shaped pipe fittings or T-shaped pipe fittings.

5. A monitoring method for gas diffusion monitoring device in a power channel based on slope adjustment according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Using a sensor module to collect real-time gas concentrations on both sides of the leak point, and determining the gas diffusion direction on both sides of the leak point; wherein, when the response speed of the sensor array on one side of the leak point is higher than the response speed of the sensor array on the other side of the leak point, it is determined that the gas diffusion direction on one side of the leak point is downslope diffusion, and the gas diffusion direction on the other side of the leak point is counterslope diffusion; S2. Continuously collect the real-time gas concentration from the sensor on the reverse slope side to determine the feasibility of continuous reverse diffusion of the gas. If the gas cannot continuously diffuse in the reverse direction, record the diffusion boundary and gas concentration on the reverse slope side. If the gas can continuously diffuse in the reverse direction, execute step S3 to calculate the gas diffusion rate for reverse diffusion. S3. Record the response time and spacing of adjacent sensor arrays respectively, and calculate the gas diffusion rate of down-slope diffusion and down-slope diffusion respectively; S4. Adjust the slope of the power channel using the slope adjustment module, adjust the gas leakage in the power channel using the gas leakage module, revise the adjusted gas diffusion coefficient, and update the gas diffusion rates for both the down-slope diffusion and the down-slope diffusion. S5. Establish a data set for revising the gas diffusion coefficient, fit the correlation between the gas diffusion direction, leakage amount and slope, and establish a gas diffusion prediction model.

6. The monitoring method according to claim 5, characterized in that: In S3, the following formula is used to calculate the gas diffusion rate along the slope: Where, represents the gas diffusion rate along the slope, represents the spacing between adjacent sensor arrays on the slope side, represents the difference in response time of adjacent sensor arrays on the downslope side; The gas diffusion rate of the reverse slope diffusion is calculated using the following formula: Where, represents the gas diffusion rate of the counter-slope diffusion, represents the spacing between adjacent sensor arrays on the upslope side, It represents the difference in response time between adjacent sensor arrays on the upslope side.

7. The monitoring method according to claim 6, characterized in that: In S4, the adjusted leakage diffusion coefficient is revised using the following formula: Where, represents the diffusion coefficient of leakage, represents the diffusion coefficient of the reference leakage, Indicates the leakage adjustment parameter Indicates the amount of gas leakage.

8. The monitoring method according to claim 7, characterized in that: In S4, the adjusted downslope diffusion coefficient is revised using the following formula: Where, represents the downslope diffusion coefficient, represents the base downslope diffusion coefficient, represents the downslope diffusion regulation parameter, Indicates the slope of the power channel.

9. The monitoring method according to claim 8, characterized in that: In S4, the adjusted inverse slope diffusion coefficient is revised using the following formula: Where, represents the inverse slope diffusion coefficient, represents the base inverse slope diffusion coefficient, represents the inverse slope diffusion adjustment parameter.

10. The monitoring method according to claim 9, characterized in that: In S4, the following formula is used to update the gas diffusion rate along the slope: Where, represents the gas diffusion rate along the slope after the update; The gas diffusion rate for reverse-slope diffusion is updated using the following formula: Where, Indicates the gas diffusion rate of the updated reverse slope diffusion.

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