Harmful gas early warning sensing device used in underground engineering construction process

Abstract

The invention discloses a harmful gas early-warning sensing device used in an underground engineering construction process, and relates to the technical field of gas sensor monitoring, the harmful gas early-warning sensing device comprises a connecting unit, a detection early-warning unit and a mounting unit, the connecting unit comprises a connecting bottom plate, the detection early-warning unit is arranged at the top of the connecting bottom plate, and a dustproof assembly is provided with a filtering structure; according to the gas detection alarm, gas can be conveyed to the gas detection alarm, the detection range is expanded, a sensor is prevented from being polluted by soil, and the detection accuracy is guaranteed, the mounting unit is arranged at the bottom of the connecting bottom plate and comprises a driving assembly which comprises a fixing shell, a limiting assembly and a ground drilling assembly, and a motor drives the ground drilling assembly to rotate forwards and drill into the ground; according to the device, installation at any position is achieved by driving the ground drilling assembly and utilizing the limiting assembly, construction interference is avoided, and equipment stability is guaranteed; therefore, the problems that a traditional device is limited in installation position, prone to damage and misinformation and missing information during detection can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas sensor monitoring, and in particular to a harmful gas early warning sensor device used in the construction process of underground engineering. Background Art

[0002] Gas monitoring is crucial in underground natural gas extraction operations. Due to poor ventilation in underground spaces, natural gas is often mixed with a variety of complex substances and gases, such as carbon monoxide and methane. Methane, a major component of natural gas, is not only highly flammable and explosive, but can also easily cause explosions when exposed to open flames when its concentration in the air reaches a certain range. Furthermore, when gas concentrations reach high levels, it can cause oxygen deprivation and suffocation, posing a serious threat to workers' lives. Furthermore, carbon monoxide is highly toxic, and once leaked, it can silently and irreversibly harm the human body. If these harmful gases are not promptly discharged, they can easily lead to production accidents, directly threatening workers' lives. Therefore, accurate monitoring of underground gas is crucial to ensuring operational safety.

[0003] Currently, the internal environment of natural gas extraction areas such as mines and tunnels is extremely complex, which poses a huge challenge to the installation of harmful gas alarm equipment. The restricted spatial layout not only affects the choice of equipment installation location, but also reduces detection accuracy. Moreover, the underground environment is complex, and detection equipment is prone to tipping over or damage. Once this happens, the detection probe will not work properly. The density of gas is similar to that of air, and it is very easy to accumulate in poorly ventilated areas. If the detection equipment is not sensitive to changes in gas concentration, the best warning opportunity will be missed. In addition, underground gas also has the problem of uneven distribution. If the installation location of the detection equipment is not ideal, the effective detection range for gas and other harmful gases will be greatly reduced, which will eventually lead to frequent false alarms and missed alarms, seriously affecting production safety. Summary of the Invention

[0004] The purpose of the present invention is to provide a harmful gas early warning sensor device for use in the construction process of underground engineering. It is composed of a connecting unit and a detection and early warning unit and an installation unit connected to both sides of the connecting unit. The driving component in the installation unit drives the drilling component to drill into the underground wall or top, and then the device is expanded and fixed through the limiting component to achieve installation at any position, avoiding interference with construction and ensuring stability. At the same time, the dustproof component in the detection and early warning unit is equipped with a filtering structure to expand the detection range, prevent soil from contaminating the sensor, and ensure accurate and reliable detection. The above together solve the problems of limited installation, easy damage and false alarms of traditional equipment.

[0005] The present invention is achieved through the following technical solutions: A harmful gas early warning sensor device used in underground engineering construction process, comprising A connecting unit, comprising a connecting base plate; A detection and warning unit, comprising a dustproof component and a gas detection alarm arranged on the top of the connecting base plate, wherein the dustproof component is provided with a filter structure to transport gas to the gas detection alarm; The mounting unit includes a driving assembly arranged at the bottom of the connecting base plate, wherein the driving assembly includes a fixed shell, a limiting assembly rotatably arranged on the fixed shell, and a drilling assembly arranged at the bottom of the fixed shell. The driving assembly drives the drilling assembly to rotate forward through a motor to drill into the ground, and the limiting assembly forms a linkage structure with a T-shaped clamp through a steel cable. When the driving assembly drives the linkage structure in reverse through the motor, the limiting assembly will expand outward and / or retract.

[0006] In this solution, the detection and warning unit at the top uses the filtering structure built into the dustproof component to filter underground gas, effectively blocking impurities such as soil, ensuring that clean gas is delivered to the gas detection alarm, ensuring the sensor detection accuracy and expanding the monitoring range; the installation unit at the bottom drives the drilling component to rotate forward through the motor of the driving component, so that the device can quickly drill into the underground wall, top or designated position on the ground. At the same time, relying on the steel cable-T-shaped clamp linkage structure of the limit component and the drive component, when the motor is driven in reverse, the pointed rod of the limit component is controlled to expand outward and insert into the surrounding soil to form a stable multi-point fixation, or to be retracted for disassembly, thereby realizing flexible installation and rapid disassembly of the device at any position in a complex underground environment, avoiding interference with the passage and operation of construction personnel, and improving the stability of the equipment through a reliable fixed structure, solving the problems of limited installation position, easy tipping and damage, narrow detection range, false alarms and missed alarms of traditional detection equipment.

[0007] As an optimization solution for the harmful gas early warning sensor device, the dustproof component includes an outer shell, a connecting shell and a top shell connected in sequence from bottom to top. A filter cavity is formed inside the outer shell, the connecting shell and the top shell. A multi-level filter structure is sequentially arranged in the filter cavity. Under the action of the negative pressure of the exhaust device, the underground gas is continuously sucked into the filter cavity, so that the gas passes through each level of the filter structure in sequence.

[0008] In this solution, the dustproof component is connected from bottom to top in a hierarchical manner through the outer shell, the connecting shell and the top shell, and a through filter cavity is constructed inside. A multi-stage filter structure is set in it to form a systematic gas purification and collection channel: the outer shell serves as the bottom structure, which can initially block larger particulate impurities. The filter structure in the middle of the connecting shell further finely filters the gas. The exhaust device in the top shell continuously draws underground gas into the filter cavity through the action of negative pressure, so that the gas passes through the purification treatment of each level of filter structure in turn, gradually removing pollutants such as dust and soil, and finally delivering the clean gas to the gas detection alarm. This design not only effectively prevents impurities from clogging or contaminating the detection sensor, ensuring its long-term stable operation, but also expands the gas collection range through active multi-stage filtration and negative pressure adsorption, improves the ability to capture harmful gases in complex underground environments, and avoids the problem of reduced detection accuracy or false alarms due to excessive impurities in the gas.

[0009] As an optimization solution for the harmful gas early warning sensor device, an arc-shaped filter plate is provided on the outer peripheral surface of the shell, and a filter ring plate is provided inside the connecting shell. The arc-shaped filter plate and the filter ring plate form a graded filtering structure.

[0010] In this solution, the arc filter plate serves as the primary filter layer, and utilizes the arc surface structure to preliminarily intercept the inhaled gas, effectively blocking larger particles of impurities such as dust and soil, and reducing the burden of subsequent filtration. The filter ring plate serves as the secondary filter layer, and finely filters the gas inside the connecting shell to further remove tiny particles and suspended matter, forming a double barrier. This structure can not only effectively block impurities in the gas, prevent the sensor from being contaminated or blocked, and ensure the long-term stable operation of the detection element, but also guide the gas to flow evenly through reasonable flow channel design, cooperate with the negative pressure adsorption effect formed by the exhaust fan, expand the gas collection range, and enable the device to more accurately capture harmful gases in complex underground environments, reduce detection errors caused by impurity interference, and improve the reliability and detection accuracy of the early warning device.

[0011] As an optimization solution for the harmful gas warning sensor device, a conical magnifying member is provided on the top of the filter ring plate, which gradually shrinks the gas flow channel, and a sensor is provided through the outer wall of the conical magnifying member, which is electrically connected to the gas detection alarm.

[0012] In this solution, the conical amplifier on the top of the filter ring plate uses its tapered gas flow channel design to guide and accelerate the gas that has undergone graded filtration, so that the evenly purified gas gradually converges as it flows to the top, thereby increasing the concentration and fluidity of the gas sample and ensuring that the sensor can more efficiently capture harmful gas components. At the same time, the sensor is installed through the outer wall of the conical amplifier, directly contacting the gas in the contracting flow channel, maximizing the gas detection area and sensitivity, and realizing accurate real-time monitoring of harmful gases such as carbon monoxide. In addition, the conical amplifier not only optimizes the gas dynamic characteristics through flow channel contraction and enhances the detection efficiency of the sensor, but also relies on the spatial transition effect of the conical structure to concentrate the filtered gas to the detection area, avoiding detection delays or concentration distortion problems caused by gas flow dispersion, and cooperates with the front-end graded filtration structure to form a complete link from gas collection, purification to precise detection, effectively improving the monitoring accuracy and response speed of the early warning device for harmful gases in complex underground environments.

[0013] As an optimization solution for the harmful gas early warning sensor device, the gas detection alarm is electrically connected to the sensor, used to receive the detection signal of the sensor and perform real-time analysis on the concentration of harmful gases such as carbon monoxide, and trigger an audible and visual alarm when the detected concentration exceeds a preset threshold.

[0014] In this solution, when the concentration of detected hazardous gases exceeds a preset threshold, the gas detection alarm immediately triggers an audible and visual alarm. This intuitive and powerful method can immediately attract the attention of on-site personnel, prompting them to take protective measures or evacuate the danger zone. This effectively avoids safety accidents such as poisoning and explosions caused by excessive hazardous gases, providing a reliable guarantee for the safe progress of underground engineering construction.

[0015] As an optimization solution for the harmful gas warning sensor device, the drive assembly includes a connecting part arranged inside the fixed shell and a transmission rod connected to the output end of the motor. The outer diameter of the transmission rod is provided with a rotating clamp, and the outer diameter of the connecting part is sleeved with a T-shaped clamp. The T-shaped clamp is provided inside a rotating ring and a fixed block that cooperate with the rotating clamp. The rotating clamp and the fixed block are driven to engage or disengage by the forward and reverse rotation of the motor, so that the limit assembly is expanded and / or retracted outward.

[0016] In this solution, in the drive assembly, the motor drives the rotating clamp through the transmission rod. The T-shaped clamp mounted on the connector contains a rotating ring and a fixed block. When the motor rotates in the forward direction, the transmission rod drives the rotating clamp to slide along the surface of the fixed block (during forward rotation, the rotating clamp only slides but does not engage because the pointed rod is in a retracted state). At this time, the drilling assembly is driven to rotate and drill into the ground. When the drilling is completed and the device needs to be fixed, the motor rotates in the reverse direction, the rotating clamp engages the fixed block, and then drives the T-shaped clamp to rotate synchronously, causing the steel cable wrapped around the outer diameter of the T-shaped clamp to retract and release, controlling the pointed rod of the limit assembly to expand outward around the rotating axis and insert into the surrounding soil, forming a stable fixation. Conversely, when disassembling, the motor rotates in the reverse direction again. When the steel cable contracts and pulls the pointed rod to retract to the surface of the fixed shell, the rotating clamp separates from the fixed block. This solution accurately realizes the functional switching between the drilling process and limit fixation through differentiated mechanical linkage of the forward and reverse rotation of the motor. It not only ensures the rapid positioning and stable installation of the device in complex underground environments, but also avoids the tedious operation of traditional equipment relying on manual fixation, significantly improving the installation efficiency and reliability, and ensuring that the harmful gas monitoring equipment can flexibly adapt to the installation requirements of different locations and remain stable during underground engineering construction.

[0017] As an optimization solution for the harmful gas warning sensor device, one end of the fixed block has a semi-elliptical shape. When the rotating clamp rotates forward, it will squeeze and slide through the semi-elliptical surface of the fixed block. When the rotating clamp rotates reversely, the fixed block rotates synchronously with the rotating clamp until the limit assembly is retracted.

[0018] In this solution, when the motor drives the rotating clamp to rotate in the forward direction, it slides along the semi-elliptical surface of the fixed block. Due to the guiding effect of the curved surface, the rotating clamp will not engage with the fixed block, allowing the transmission rod to drive the ground drilling assembly to continue rotating and drill into the ground, realizing rapid positioning and drilling of the device. When the device needs to be fixed, the motor rotates in the reverse direction, and the rotating clamp contacts the non-elliptical end (flat or right-angled end) of the fixed block and forms an engagement, thereby driving the fixed block, rotating ring and T-shaped retaining ring to rotate synchronously, causing the steel cable wrapped around the T-shaped retaining ring to retract and release, and controlling the pointed rod of the limit assembly to expand outward and insert into the surrounding soil. When disassembling, it is only necessary to continue to rotate the motor in the reverse direction, causing the rotating ring to rotate with the T-shaped retaining ring again, causing the steel cable 3025 on the outer diameter of the T-shaped retaining ring to retract, tightening the pointed rod and shrinking it to the outer diameter surface of the fixed shell. At this time, the rotating clamp rotating in the reverse direction slides over the semi-elliptical surface again and separates from the fixed block.

[0019] As an optimization solution for the harmful gas early warning sensor device, in order to further ensure that the harmful gas monitoring equipment can flexibly adapt to the installation requirements of different locations and remain stable during underground engineering construction, the limiting assembly includes a fixed ring arranged on the outer peripheral wall of the fixed shell, and a pointed rod rotatably arranged on the fixed ring. The pointed rod is connected to the steel cable through a connecting block. The steel cable passes through the fixed shell and can be wrapped around the outer peripheral wall of the T-shaped clamp. The steel cable is retracted and extended by rotating the T-shaped clamp, thereby controlling the deployment angle of the pointed rod.

[0020] As an optimized solution for the harmful gas early warning sensor device, the pointed rod is rotatably connected to the fixed ring through a rotating shaft, and the axis of the rotating shaft is perpendicular to the radial direction of the fixed shell, so that the pointed rod can be expanded toward the outer periphery of the fixed shell and inserted into the surrounding soil, forming at least a three-point fixed structure.

[0021] In this solution, a fixing ring is arranged along the outer peripheral wall of the fixing shell, providing a rotation fulcrum for the pointed rod, so that the angle can be flexibly adjusted around the rotation axis; the pointed rod is connected to the steel cable through a connecting block, and the steel cable passes through the fixing shell and is wrapped around the outer peripheral wall of the T-shaped clamp. When the T-shaped clamp is driven to rotate by the motor, the steel cable is retracted and released accordingly. When the steel cable is relaxed, the pointed rod expands outward around the fixing ring under the action of gravity or spring force, and the tip is inserted into the surrounding soil or rock layer to form a multi-point support fixation; when the steel cable is tightened, the pointed rod is retracted toward the outer peripheral wall of the fixing shell, which is convenient for disassembly of the device.

[0022] As an optimization solution for the harmful gas early warning sensor device, the ground drilling assembly includes a soil guide piece arranged at the bottom of the fixed shell, a driving ring arranged inside the soil guide piece, a drill bit piece connected to the bottom of the driving ring, and a rotating head mounted on the outside of the drill bit piece. The outer wall of the rotating head is provided with a spiral soil guide groove for discharging the drilled soil along the soil guide piece.

[0023] In this solution, a drive ring is connected to the motor output, driving the drill bit and external rotating head to rotate at high speed, achieving rapid drilling of underground walls, ceilings, or the ground. The spiral soil guide groove on the outer wall of the rotating head forms a diversion channel during rotation, discharging the soil produced by drilling upward or outward along the inner wall of the soil guide, preventing soil accumulation and blockage in the borehole and ensuring smooth drilling. This solution not only improves the device's drilling efficiency in various geological conditions and reduces the risk of drill sticking, but also, through the directional soil discharge function of the spiral soil guide groove, creates a clean working space for the subsequent deployment and fixation of the limit assembly, allowing the pointed rod to be accurately inserted into the surrounding solid stratum, enhancing the overall installation stability of the device.

[0024] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention connects the base plate to insert the driving assembly and the ground drilling assembly into the underground wall or roof. The driving assembly drives the ground drilling assembly to drill into the soil. This allows the detection equipment to be flexibly installed at any location in the underground mine, such as narrow lanes and complex corners, avoiding interference with the passage and construction of construction personnel. The expansion and contraction structure of the limit assembly in the present invention, with the help of a motor drive and transmission structure, allows the limit assembly to be expanded and fixed when the detection equipment is installed, making the installation process simple and quick; and the limit assembly to be retracted when disassembling, making the entire process easy to operate, greatly improving the use efficiency and saving time and labor costs; The dustproof component of the present invention includes an outer shell, a connecting shell, a top shell and other structures. The outer peripheral wall of the outer shell is provided with an arc-shaped filter plate, and the interior of the connecting shell is provided with a filter ring plate. The two form a double-layer filtering structure, which effectively prevents dirt from entering the detection sensor and ensures the accuracy of the detection. At the same time, the exhaust fan in the dustproof component cooperates with the conical amplifier to generate negative pressure inside the connecting shell and the outer shell, actively absorbing the nearby air and expanding the detection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a bottom view structural schematic diagram of the present invention; Figure 3 Schematic diagram of the detection cross-section structure of the present invention; Figure 4 for Figure 3 The enlarged structural diagram at the mark A in the middle; Figure 5 This is a schematic diagram of the installation assembly structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the installation assembly of the present invention; Figure 7 for Figure 6 The enlarged structural diagram is shown at mark B in the figure.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the installation component of the present invention.

[0027] Figure 9 for Figure 8 The enlarged structural diagram is shown at mark C.

[0028] Figure 10 for Figure 8 The structure diagram at the mark D is enlarged.

[0029] Markings and corresponding parts names in the accompanying drawings: 100-connection unit, 101-connection base plate, 200-detection and warning unit, 201-dustproof component, 2011-housing, 2012-arc filter plate, 2013-filter ring plate, 2014-connection shell, 2015-top shell, 2016-conical amplifier, 2017-sensor, 2018-exhaust fan, 2019-exhaust outlet, 202-gas detection alarm, 300-installation unit, 301-drive component, 3011-fixed shell, 3012- Connecting parts, 3013-T-type clamping ring, 3014-rotating ring, 3015-motor, 3016-transmission rod, 3017-fixed block, 3018-rotating clamp, 302-limiting assembly, 3021-fixed ring, 3022-rotating shaft, 3023-pointed plug rod, 3024-connecting block, 3025-steel cable, 303-drilling assembly, 3031-soil guide, 3032-drive ring, 3033-drill bit, 3034-rotating head, 3035-soil guide groove. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0031] Example 1

[0032] This embodiment 1 provides a harmful gas early warning sensor device for use in underground engineering construction. Figure 1-Figure 2 As shown, it includes: a connection unit 100, a detection and warning unit 200 and an installation unit 300.

[0033] Wherein, the connection unit 100 includes a connection base plate 101; The detection and warning unit 200 includes a dustproof assembly 201 bolted to the top of the connection base plate 101, and a gas detection alarm 202 bolted to the dustproof assembly 201. When detecting harmful gases during underground construction, the gas detection alarm 202, with the assistance of the dustproof assembly 201, enhances the gas detection range. The dustproof assembly 201 can also effectively prevent underground impurities such as soil from falling or adhering to the detector sensor, causing the sensor to be affected by the soil, thereby affecting the detection effect. The installation unit 300 includes a drive assembly 301 bolted to the bottom of the connecting base plate 101, the drive assembly 301 includes a fixed shell 3011, a limit assembly 302 rotatably connected to the fixed shell 3011, and a drilling assembly 303 connected to the bottom of the fixed shell 3011, and the drilling assembly 303 is connected to the limit assembly 302. When detecting harmful gases during underground construction, the operator first installs the gas detector in the natural gas mine that has been dug. The operator picks up the connecting base plate 101 and aligns the drilling assembly 303 with the position where it needs to be installed. After alignment, the drive assembly 301 starts to drive the drilling assembly 303 to rotate and starts drilling a hole at the installation point. , so that both the limit component 302 and the drive component 301 are drilled into the soil, and then the drive component 301 rotates in the opposite direction to release the limit of the limit component 302, so that the limit component 302 is expanded to the periphery, and after expansion, it is inserted into the soil next to it to fix the whole. At the same time, the overall installation of the connecting base plate 101 with the detection and early warning unit 200 is completed, and the installation is started. When the position of the gas detection alarm 202 needs to be adjusted, it is only necessary to continue to rotate the drive component 301 in the opposite direction so that the limit component 302 is rotated and tightened, and shrinks to the surface of the drive component 301, and then the connecting base plate 101 is pulled back to complete the disassembly, thereby achieving quick installation and disassembly.

[0034] In addition, the gas detection range of the gas detection alarm 202 is enhanced with the assistance of the dustproof component 201. Under the action of the dustproof component 201, it can also effectively prevent impurities such as underground soil from falling or adhering to the sensor of the detector, causing the sensor to be affected by soil, etc., thereby affecting the detection effect. The detection equipment can be flexibly installed at any position in the underground mine to avoid interference with the passage and construction of construction personnel, while ensuring the stability of the equipment. The expansion and contraction design of the limit component 302 realizes the rapid installation and disassembly of the detection equipment, greatly improves the use efficiency, saves time and labor costs, and the cooperation between the dustproof component 201 and the gas detection alarm 202 not only enhances the detection range, but also prevents soil from entering the detection sensor, ensuring the accuracy and reliability of the detection.

[0035] Example 2

[0036] This embodiment 2 provides a harmful gas early warning sensor device for underground engineering construction based on embodiment 1. Figures 1-4As shown, the difference between this embodiment and embodiment 1 is that the dustproof component 201 includes a shell 2011 arranged on the top of the connecting base plate 101, a connecting shell 2014 arranged on the top of the connecting shell 2014, a top shell 2015 arranged on the top of the connecting shell 2014, and an exhaust port 2019 arranged on the top of the top shell 2015. A filter cavity is formed inside the shell 2011, the connecting shell 2014 and the top shell 2015. A multi-stage filter structure is sequentially arranged in the filter cavity. The specific number of settings can be selected according to actual needs. In this embodiment, an arc-shaped filter plate 2012 is installed on the outer peripheral wall of the shell 2011, a filter ring plate 2013 is arranged inside the connecting shell 2014, and the filter ring plate 2013 is connected to the shell 2011. The arc-shaped filter plate 2012 and the filter ring plate 2013 form a graded filter structure. When harmful gases are detected during underground construction, the exhaust fan 2018 starts working to filter the filter cavity. Negative pressure is generated inside, and the suction force is transferred to the external air through the curved filter plate 2012 inside the shell 2011, and negative pressure adsorption of the nearby air begins, so that the nearby gas enters the interior of the dustproof component 201, and the gas floats into the interior of the shell 2011 through the curved filter plate 2012 on the shell 2011, and under the action of the curved filter plate 2012, a part of the dirt and impurities are initially intercepted. After the gas enters the interior of the shell 2011, it begins to move upward and passes through the filter ring plate 2013 again. When the gas passes through the filter ring plate 2013, it is intercepted and filtered again by the filter ring plate 2013. Finally, the tapered shape of the conical amplifier 2016 causes the gas to begin to be squeezed and move upward, and at the same time, it is detected by the sensor 2017 and transported to the interior of the gas detection alarm 202 for processing, and then the excess gas is discharged through the exhaust port 2019.

[0037] Specifically, the outer peripheral wall of the above-mentioned conical magnifying member 2016 is penetrated by and connected with a sensor 2017, and the other end of the sensor 2017 is connected to the gas detection alarm 202. An exhaust fan 2018 is provided inside the top shell 2015, and the output end of the exhaust fan 2018 is connected to the conical magnifying member 2016, and the output end of the exhaust fan 2018 is connected to the exhaust port 2019. After the exhaust fan 2018 generates negative pressure to suck all the nearby gases into the interior of the outer shell 2011, when passing through the interior of the connecting shell 2014, the sensor 2017 transports the intercepted gas to the interior of the gas detection alarm 202, and the gas detection alarm 202 detects it. If the harmful gas exceeds the threshold, the gas detection alarm 202 starts to alarm to prevent natural gas leakage or harmful gas leakage.

[0038] During use, when detecting harmful gases during underground construction, the exhaust fan 2018 starts working to generate negative pressure inside the connecting shell 2014 and the outer shell 2011, and transmits the suction force to the external air through the arc filter plate 2012 inside the outer shell 2011, and starts to perform negative pressure adsorption on the nearby air, so that the nearby gas enters the interior of the dustproof component 201, and the gas passes through the arc filter plate 2012 on the outer shell 2011 and floats into the interior of the outer shell 2011, and under the action of the arc filter plate 2012, a part of the soil and impurities are initially intercepted. After the gas enters the interior of the outer shell 2011, it starts to move upward and passes through the filter ring plate 2013 again. When the gas passes through the filter ring plate 2013, it is filtered again. Plate 2013 performs an interception and filtration, and finally the shape of the conical amplifier 2016 causes the gas to begin to be squeezed and move upward, and at the same time is detected by sensor 2017, and the gas is transported to the interior of the gas detection alarm 202 for processing, and then the excess gas is discharged through the exhaust port 2019. After the exhaust fan 2018 generates negative pressure to suck all the nearby gas into the interior of the outer shell 2011, when passing through the interior of the connecting shell 2014, the sensor 2017 transports the intercepted gas to the interior of the gas detection alarm 202, and the gas detection alarm 202 detects it. If the harmful gas exceeds the threshold, the gas detection alarm 202 starts to alarm to prevent natural gas leakage or harmful gas leakage.

[0039] Example 3

[0040] This embodiment 3 provides a harmful gas early warning sensor device for underground engineering construction based on embodiment 1 or embodiment 2. Figures 1-10 As shown, the difference of this embodiment 3 is that: the driving assembly 301 includes a fixed shell 3011 arranged at the bottom of the connecting base plate 101, a connecting member 3012 arranged inside the fixed shell 3011, a motor 3015 arranged at the top of the connecting member 3012 and a transmission rod 3016 arranged at the output end of the motor 3015, and the transmission rod 3016 is connected to the drilling assembly 303, the outer peripheral wall of the connecting member 3012 is sleeved with a T-shaped retaining ring 3013, the interior of the T-shaped retaining ring 3013 is provided with a rotating ring 3014, the interior of the rotating ring 3014 is provided with a fixed block 3017, the outer diameter of the transmission rod 3016 is fixedly connected to a rotating clamp 3018, and the rotating clamp 3018 rotates inside the rotating ring 3014 and cooperates with the fixed block 3017, and the rotating clamp 3018 and the fixed block 3017 are engaged or separated by the forward / reverse rotation of the motor 3015, so that the limit assembly 302 is expanded and / or retracted outward.

[0041] Before underground construction, it is necessary to install a gas detector underground. During the installation, the operator picks up the connecting base plate 101 and aligns the rotating head 3034 with the position where the installation is required. Then the motor 3015 starts to rotate with the transmission rod 3016 and the drive ring 3032 at the bottom of the transmission rod 3016. At the same time, the drill bit 3033 also starts to rotate with the rotating head 3034 to excavate the soil, and transports the excavated soil to the inside of the soil guide part 3031 through the soil guide groove 3035, and discharges the soil from the gap of the soil guide part 3031. After the rotating head 3034 completes the excavation, the outer diameters of the limit assembly 302 and the drive assembly 301 are both in the soil, thereby completing the pre-installation preparations.

[0042] Specifically, in this embodiment, the limiting assembly 302 includes a fixing ring 3021 provided on the outer peripheral wall of the fixing shell 3011, a rotating shaft 3022 provided on the fixing ring 3021, a pointed rod 3023 rotatably provided on the rotating shaft 3022, a connecting block 3024 provided on the pointed rod 3023, and a steel cable 3025 provided on the connecting block 3024, and the steel cable 3025 passes through the fixing shell 3011 and is connected to the T-shaped clamping ring 3013, and the drilling assembly 303 includes an earth guide 3031 provided on the bottom of the fixing shell 3011, an earth guide 3031 provided on the earth guide 3031, and an earth guide 3031 provided on the earth guide 3031. The driving ring 3032 inside the driving ring 3032, the drill bit 3033 provided at the bottom of the driving ring 3032, the rotating head 3034 provided outside the drill bit 3033, and the soil guide groove 3035 provided on the rotating head 3034, when the motor 3015 rotates in the reverse direction, and when the motor 3015 rotates in the reverse direction, the transmission rod 3016 also rotates in the reverse direction with the rotating clamp 3018 on the outer diameter of the transmission rod 3016, and during the reverse rotation of the rotating clamp 3018, it is engaged with the fixed block 3017, and the semi-elliptical shape of the fixed block 3017 causes the rotating clamp 3018 to rotate in the reverse direction. When the rotating clamp 3018 rotates forward, it will squeeze and slide over the surface of the fixed block 3017. However, when the rotating clamp 3018 rotates reversely, it will clamp the fixed block 3017, causing the rotating clamp 3018 to rotate reversely with the fixed block 3017. At the same time, the rotating ring 3014 also starts to rotate reversely. When the rotating ring 3014 rotates reversely, the T-shaped clamp 3013 also starts to rotate, causing the steel cable 3025 wrapped around the outer diameter of the T-shaped clamp 3013 to fall off, causing the pointed rod 3023 fixed at the other end of the steel cable 3025 to move around under the action of the rotating shaft 3022. Unfold, and by lifting the connecting base plate 101 upwards, the unfolded pointed rod 3023 is inserted into the surrounding soil, thereby completing quick installation. At the same time, when the position of the gas detector needs to be adjusted, it is only necessary to continue to rotate the motor 3015 in the opposite direction, so that the rotating ring 3014 rotates with the T-shaped clamping ring 3013 again, so that the steel cable 3025 on the outer diameter of the T-shaped clamping ring 3013 is contracted, and the pointed rod 3023 is tightened and contracted to the outer diameter surface of the fixed shell 3011. At the same time, the connecting base plate 101 is lifted up to complete the disassembly, which can achieve the function of quick installation and quick disassembly.

[0043] During use, the gas detector needs to be installed underground before underground construction. During installation, the operator picks up the connecting base plate 101 and aligns the rotating head 3034 with the position where it needs to be installed. Then the motor 3015 starts to rotate with the transmission rod 3016 and the drive ring 3032 at the bottom of the transmission rod 3016. At the same time, the drill bit 3033 also starts to rotate with the rotating head 3034 to excavate the soil, and transports the excavated soil to the inside of the soil guide part 3031 through the soil guide groove 3035, and discharges the soil from the gap of the soil guide part 3031. After the rotating head 3034 completes the excavation, the outer diameters of the limit assembly 302 and the drive assembly 301 are both in the soil, thereby completing the pre-installation preparations.

[0044] When the motor 3015 rotates in the reverse direction, the transmission rod 3016 also rotates in the reverse direction with the rotating clamp 3018 on the outer diameter of the transmission rod 3016, and the rotating clamp 3018 is engaged with the fixed block 3017 during the reverse rotation. When the rotating clamp 3018 rotates in the forward direction, it will squeeze and slide from the surface of the fixed block 3017 under the semi-elliptical shape of the fixed block 3017, but when the rotating clamp 3018 rotates in the reverse direction, it will clamp the fixed block 3017, so that the rotating clamp 3018 rotates in the reverse direction with the fixed block 3017, and at the same time, the rotating ring 3014 also starts to rotate in the reverse direction. When the rotating ring 3014 rotates in the reverse direction, the T-shaped clamp 3013 also starts to rotate, causing the steel cable 3025 wrapped around the outer diameter of the T-shaped clamp 3013 to fall off, causing the pointed rod 3023 fixed at the other end of the steel cable 3025 to rotate. Under the action of the rotating shaft 3022, it is expanded to the surroundings, and by lifting the connecting base plate 101 upwards, the expanded pointed rod 3023 is inserted into the surrounding soil, thereby completing quick installation. At the same time, when the position of the gas detector needs to be adjusted, the motor 3015 only needs to continue to rotate in the opposite direction, so that the rotating ring 3014 rotates with the T-shaped clamping ring 3013 again, so that the steel cable 3025 on the outer diameter of the T-shaped clamping ring 3013 is contracted, and the pointed rod 3023 is tightened and contracted to the outer diameter surface of the fixed shell 3011. At the same time, the connecting base plate 101 is lifted up to complete the disassembly, which can achieve the function of quick installation and quick disassembly, so that the detection equipment can be flexibly installed at any position in the underground mine, avoiding interference with the passage and construction of construction personnel, while ensuring the stability of the equipment, realizing quick installation and disassembly of the detection equipment, greatly improving the use efficiency, and saving time and labor costs.

[0045] When the motor rotates forward, the transmission rod 3016 drives the rotating clamp 3018 to slide along the surface of the fixed block 3017. At this time, during the forward rotation, the rotating clamp 3018 only slides but does not engage because the pointed insertion rod 3023 is in a retracted state, and the drilling assembly 303 is driven to rotate and drill into the ground; when the drilling is completed and the device needs to be fixed, the motor 3015 rotates in the reverse direction, and the rotating clamp 3018 clamps the fixed block 3017, thereby driving the T-shaped clamp 3013 to rotate synchronously, so that the steel cable 3025 wrapped around the outer diameter of the T-shaped clamp 3013 is retracted and released, controlling the pointed insertion rod 3023 of the limit assembly 302 to expand outward around the rotating axis and insert into the surrounding soil to form a stable fixation; on the contrary, when disassembling, the motor 3015 rotates in the reverse direction again, and when the steel cable 3025 contracts and pulls the pointed insertion rod 3023 to retract to the surface of the fixed shell 3011, the rotating clamp 3018 is separated from the fixed block 3017.

[0046] At the same time, the combination of the dustproof component 201 and the gas detection alarm 202 not only enhances the detection range, but also prevents soil from entering the detection sensor, ensuring the accuracy and reliability of the detection, and solves the problem of limited installation position, easy tipping or damage of traditional detection equipment, avoiding the reduction of detection range, false alarms or missed alarms due to thin underground gas and poor installation position.

[0047] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A harmful gas early warning sensor device used in underground engineering construction, characterized in that: include A connecting unit (100) comprising a connecting base plate (101); A detection and warning unit (200) comprises a dustproof component (201) and a gas detection alarm (202) arranged on the top of the connecting base plate (101), wherein the dustproof component (201) is provided with a filter structure for conveying gas to the gas detection alarm (202); The mounting unit (300) comprises a driving assembly (301) arranged at the bottom of the connecting base plate (101), wherein the driving assembly (301) comprises a fixed shell (3011), a limiting assembly (302) rotatably arranged on the fixed shell (3011), and a ground-drilling assembly (303) arranged at the bottom of the fixed shell (3011); the driving assembly (301) drives the ground-drilling assembly (303) to rotate forward and drill into the ground via a motor (3015); and the limiting assembly (302) forms a linkage structure with a T-shaped clamping ring (3013) via a steel cable (3025); when the driving assembly (301) drives the linkage structure in the reverse direction via the motor (3015), the limiting assembly (302) will expand outward and / or retract.

2. The harmful gas early warning sensor device for underground engineering construction according to claim 1, characterized in that: The dustproof component (201) comprises an outer shell (2011), a connecting shell (2014) and a top shell (2015) which are connected in sequence from bottom to top. A filter cavity is formed inside the outer shell (2011), the connecting shell (2014) and the top shell (2015). Multiple levels of filter structures are sequentially arranged in the filter cavity. Under the negative pressure of the exhaust device, underground gas is continuously sucked into the filter cavity, so that the gas passes through each level of filter structure in sequence.

3. The harmful gas early warning sensor device used in underground engineering construction according to claim 2 is characterized in that: An arc-shaped filter plate (2012) is provided on the outer peripheral surface of the outer shell (2011), and a filter ring plate (2013) is provided inside the connecting shell (2014), wherein the arc-shaped filter plate (2012) and the filter ring plate (2013) form a graded filtering structure.

4. The harmful gas early warning sensor device used in underground engineering construction according to claim 3, characterized in that: A conical magnifying member (2016) is provided on the top of the filter ring plate (2013), and the conical magnifying member (2016) causes the gas flow channel to gradually shrink. A sensor (2017) is provided through the outer peripheral wall of the conical magnifying member (2016), and the sensor (2017) is electrically connected to the gas detection alarm (202).

5. The harmful gas early warning sensor device used in underground engineering construction according to claim 4, characterized in that: The gas detection alarm (202) is electrically connected to the sensor (2017) and is used to receive the detection signal of the sensor (2017) and perform real-time analysis on the concentration of harmful gases, and trigger an audible and visual alarm when the detected concentration exceeds a preset threshold.

6. The harmful gas early warning sensor device used in underground engineering construction according to claim 1, characterized in that: The driving assembly (301) comprises a connecting piece (3012) arranged inside the fixed shell (3011) and a transmission rod (3016) connected to the output end of the motor (3015); a rotating clamp (3018) is provided on the outer diameter of the transmission rod (3016); the T-shaped snap ring (3013) is sleeved on the outer diameter of the connecting piece (3012); a rotating ring (3014) and a fixed block (3017) are provided inside the T-shaped snap ring (3013) for cooperating with the rotating clamp (3018); the rotating clamp (3018) and the fixed block (3017) are driven to engage or disengage with each other by the forward and reverse rotation of the motor (3015), thereby causing the limiting assembly (302) to expand outward and / or retract.

7. The harmful gas early warning sensor device used in underground engineering construction according to claim 6, characterized in that: One end of the fixed block (3017) is semi-elliptical in shape. When the rotating clamp (3018) rotates forward, it squeezes and slides through the semi-elliptical surface of the fixed block (3017). When the rotating clamp (3018) rotates reversely, the fixed block (3017) rotates synchronously with the rotating clamp (3018) until the limiting assembly (302) is retracted.

8. The harmful gas early warning sensor device used in underground engineering construction according to claim 6, characterized in that: The limiting assembly (302) comprises a fixing ring (3021) arranged on the outer peripheral wall of the fixing shell (3011), and a pointed rod (3023) rotatably arranged on the fixing ring (3021); the pointed rod (3023) is connected to a steel cable (3025) via a connecting block (3024); the steel cable (3025) passes through the fixing shell (3011) and can be wound around the outer peripheral wall of the T-shaped snap ring (3013); the steel cable (3025) is retracted and extended by rotating the T-shaped snap ring (3013), thereby controlling the deployment angle of the pointed rod (3023).

9. The harmful gas early warning sensor device used in underground engineering construction according to claim 8, characterized in that: The pointed insertion rod (3023) is rotatably connected to the fixing ring (3021) via a rotating shaft (3022), and the axis of the rotating shaft (3022) is perpendicular to the radial direction of the fixing shell (3011), so that the pointed insertion rod (3023) can be deployed toward the outer periphery of the fixing shell (3011) and inserted into the surrounding soil, forming at least a three-point fixing structure.

10. The harmful gas early warning sensor device used in underground engineering construction according to claim 1, characterized in that: The earth-drilling assembly (303) comprises an earth-guiding member (3031) arranged at the bottom of the fixed shell (3011), a driving ring (3032) arranged inside the earth-guiding member (3031), a drill bit (3033) connected to the bottom of the driving ring (3032), and a rotating head (3034) sleeved on the outside of the drill bit (3033). The outer wall of the rotating head (3034) is provided with a spiral earth-guiding groove (3035) for discharging drilled soil along the earth-guiding member (3031).

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