A harmful gas early warning sensing device for underground engineering construction process

Abstract

The application discloses a harmful gas early warning sensing device for underground engineering construction, and relates to the technical field of gas sensor monitoring, which comprises a connecting unit, a detection and early warning unit and a mounting unit. The connecting unit comprises a connecting bottom plate, and the detection and early warning unit is arranged on the top of the connecting bottom plate. The dustproof assembly of the detection and early warning unit is provided with a filtering structure, which can convey gas to a gas detection alarm instrument, expand the detection range and prevent the sensor from being polluted by soil, thereby guaranteeing the detection accuracy. The mounting unit is arranged on the bottom of the connecting bottom plate and comprises a driving assembly, a limiting assembly and a ground drilling assembly. The motor drives the ground drilling assembly to rotate forward to drill into the ground. When the motor is reversely driven, the limiting assembly is expanded or contracted through the linkage of a steel cable and a T-shaped snap ring. The device can be mounted at any position through the driving of the ground drilling assembly and the limiting assembly, which can not only avoid interfering with the construction, but also ensure the stability of the equipment. Therefore, the application can solve the problems of the limited installation position of the traditional equipment, the easy damage of the traditional equipment and the false alarm and missed alarm during the detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas sensor monitoring, in particular to a harmful gas early warning sensing device for underground engineering construction process. BACKGROUND

[0002] In the process of natural gas underground mining, gas monitoring is crucial. Due to poor ventilation conditions in underground space, natural gas often contains carbon monoxide, gas and other complex substances and gases. Gas, i.e. methane, as one of the main components of natural gas, is not only flammable and explosive, but also extremely easy to cause explosion when exposed to open flame when the air content reaches a certain concentration range. In addition, carbon monoxide is also highly toxic, and once leaked, it can cause irreversible harm to the human body silently. If these harmful gases cannot be discharged in time, it is easy to cause safety production accidents, directly threatening the safety of workers, so accurate monitoring of underground gas is a key link to ensure safety in operation.

[0003] At present, the internal environment of natural gas mining areas such as mines and tunnels is extremely complex, which poses a great challenge to the installation of harmful gas alarm equipment. The limited space layout not only affects the selection of equipment installation location, but also reduces the detection accuracy. Moreover, the underground environment is complex, and the detection equipment is easy to tip over or be damaged. Once this happens, the detection probe cannot work normally. The density of gas is similar to that of air, and it is easy to accumulate in poorly ventilated areas. If the detection equipment is not sensitive to the change of gas concentration, the best early warning opportunity will be missed. In addition, underground gas also has the problem of uneven distribution. If the installation position of the detection equipment is not ideal, the effective detection range of gas and other harmful gases will be greatly reduced, eventually leading to frequent false positives and false negatives, seriously affecting safety production. SUMMARY

[0004] The purpose of the present application is to provide a harmful gas early warning sensing device for underground engineering construction process, which is composed of a connecting unit, a detection and early warning unit connected to the two sides of the connecting unit, and an installation unit. The driving assembly in the installation unit drives the earth boring assembly to drill into the underground wall or the top, and then the limiting assembly is expanded and fixed to realize the installation of the equipment at any position, avoiding interference with the construction and ensuring stability. At the same time, the dustproof assembly in the detection and early warning unit is provided with a filter structure to expand the detection range and prevent soil pollution of the sensor, ensuring accurate and reliable detection. The above solves the problems of limited installation, easy damage and false positives and false negatives of traditional equipment.

[0005] The present application is realized by the following technical scheme:

[0006] A harmful gas early warning sensing device for underground engineering construction process, comprising

[0007] A connecting unit, comprising a connecting base plate;

[0008] 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;

[0009] 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.

[0010] 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.

[0011] 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.

[0012] In the scheme, the dustproof assembly is connected from bottom to top in a hierarchical manner through the shell, the connecting shell and the top shell, a through filter cavity is constructed inside, a multi-stage filter structure is arranged therein, a systematic gas purification and collection channel is formed: the shell as the bottom structure can preliminarily block larger particle impurities, the filter structure in the middle of the connecting shell further finely filters the gas, and the air extraction device in the top shell continuously sucks the underground gas into the filter cavity through negative pressure, so that the gas is sequentially purified by the filter structures at each level, gradually removing dust, soil and other pollutants, and finally delivering the clean gas to the gas detection alarm instrument. This design not only effectively prevents impurities from blocking or polluting the detection sensor, ensuring its long-term stable operation, but also expands the gas collection range and improves the capture ability of harmful gases in complex underground environments through active multi-stage filtration and negative pressure adsorption, avoiding the problem of reduced detection accuracy or false or missed alarms caused by too many impurities in the gas.

[0013] As an optimization scheme of the harmful gas early warning sensing device, the outer periphery of the shell is provided with an arc-shaped filter plate, the inside of the connecting shell is provided with a filter ring plate, and the arc-shaped filter plate and the filter ring plate form a hierarchical filter structure.

[0014] In the scheme, the arc-shaped filter plate serves as a first filter layer, which preliminarily intercepts the inhaled gas by using the arc-shaped curved surface structure, effectively blocks larger particle impurities such as dust and soil, and reduces the subsequent filtering burden, while the filter ring plate serves as a second filter layer, which finely filters the gas inside the connecting shell to further remove small particles and suspended solids, forming a double barrier. This structure not only efficiently blocks impurities in the gas to prevent the sensor from being contaminated or blocked, ensuring the long-term stable operation of the detection element, but also expands the gas collection range through the negative pressure adsorption effect of the reasonable flow channel design and the air extractor, so that the device can 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.

[0015] As an optimization scheme of the harmful gas early warning sensing device, the top of the filter ring plate is provided with a tapered amplifier, the tapered amplifier makes the gas flow channel gradually shrink, and the outer peripheral wall of the tapered amplifier is provided with a sensor, and the sensor is electrically connected with the gas detection alarm instrument.

[0016] In the scheme, the tapered amplifier on the top of the filter ring plate forms a guide and acceleration effect on the gas filtered by the grading filter through its tapered gas flow channel design, so that the uniformly purified gas gradually converges when flowing to the top, improving the concentration and flowability of the gas sample, and ensuring that the sensor can more efficiently capture harmful gas components; at the same time, the sensor is arranged through the outer peripheral wall of the tapered amplifier and directly contacts the gas in the converging 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 tapered amplifier not only optimizes the gas dynamics through the flow channel contraction, but also enhances the detection efficiency of the sensor, and relies on the spatial transition effect of the tapered structure to guide the filtered gas to the detection area, avoiding detection delay or concentration distortion caused by dispersed gas flow, and forming a complete link from gas collection, purification to accurate detection with the front-end grading filter structure, effectively improving the monitoring accuracy and response speed of the early warning device for harmful gases in complex underground environments.

[0017] As an optimization scheme of the harmful gas early warning sensor device, the gas detection alarm instrument is electrically connected with the sensor for receiving the detection signal of the sensor and performing real-time analysis on the concentration of harmful gases such as carbon monoxide, and triggering an audible and visual alarm when the detection concentration exceeds the preset threshold.

[0018] In the scheme, when the detected concentration of harmful gases exceeds the preset threshold, the gas detection alarm instrument immediately triggers an audible and visual alarm. The audible and visual alarm is an intuitive and strong way that can attract the attention of on-site personnel at the first time, reminding them to take protective measures or evacuate the danger area in time, thereby effectively avoiding safety accidents such as poisoning and explosion caused by harmful gas exceeding the standard, and providing a reliable guarantee for the safety of underground engineering construction.

[0019] As an optimization scheme of the harmful gas early warning sensor device, the driving assembly includes a connecting piece arranged inside the fixed shell and a transmission rod connected with the output end of the motor, the outer diameter of the transmission rod is provided with a rotating clamping piece, the outer diameter of the connecting piece is provided with a T-shaped clasp ring, the inside of the T-shaped clasp ring is provided with a rotating ring and a fixed block matched with the rotating clamping piece, and the clamping or separation of the rotating clamping piece and the fixed block is driven by the forward and reverse rotation of the motor, so that the limiting assembly expands and / or contracts outward.

[0020] In the scheme, in the driving assembly, the motor drives the rotating clamp to rotate through the transmission rod, and the rotating ring and the fixed block are arranged in the T-shaped clasp ring sleeved on the connecting piece. When the motor rotates forward, the transmission rod drives the rotating clamp to slide along the surface of the fixed block (the rotating clamp only slides without engagement because the sharp head insertion rod is in the retracted state when rotating forward), at this time, the driving drilling assembly rotates to drill into the ground; when the drilling is completed and the fixing device is needed, the motor reverses, the rotating clamp clamps the fixed block, and then drives the T-shaped clasp ring to rotate synchronously, so that the steel cable wound on the outer diameter of the T-shaped clasp ring is retracted, the sharp head insertion rod of the limiting assembly is unfolded outward around the rotating shaft and inserted into the surrounding soil to form stable fixation; conversely, when disassembling, the motor reverses again, and when the steel cable is retracted to pull the sharp head insertion rod to retract to the surface of the fixed shell, the rotating clamp is separated from the fixed block. The scheme realizes the function switching of the drilling process and the limiting fixation through the differential mechanical linkage of the forward and reverse rotation of the motor, which not only ensures the rapid positioning and stable installation of the device in the complex underground environment, but also avoids the cumbersome operation of the traditional equipment relying on manual fixation, significantly improves the installation efficiency and reliability, and ensures that the harmful gas monitoring equipment can flexibly adapt to the installation requirements of different positions and remain stable in the underground engineering construction.

[0021] As an optimization scheme of the harmful gas early warning sensing device, one end of the fixed block is a semi-elliptical shape, when the rotating clamp rotates forward, it will be extruded and slide off the surface of the semi-elliptical shape of the fixed block, when the rotating clamp reverses, the fixed block rotates synchronously with the rotating clamp until the limiting assembly retracts.

[0022] In the scheme, when the motor drives the rotating clamp to rotate forward, it slides along the semi-elliptical surface of the fixed block, and due to the guiding effect of the curved surface shape, the rotating clamp will not engage with the fixed block, thereby allowing the transmission rod to drive the drilling assembly to continue rotating and drilling into the ground, realizing the rapid positioning drilling of the device; when the device needs to be fixed, the motor reverses, the rotating clamp contacts the non-elliptical end (flat or right-angled end) of the fixed block and engages, thereby driving the fixed block, rotating ring and T-shaped clasp ring to rotate synchronously, so that the steel cable wound on the T-shaped clasp ring is retracted, and the sharp head insertion rod of the limiting assembly is unfolded outward and inserted into the surrounding soil. When disassembling, the motor continues to reverse, so that the rotating ring rotates again with the T-shaped clasp ring, the steel cable 3025 on the outer diameter of the T-shaped clasp ring is retracted, the sharp head insertion rod is pulled tight and retracted to the outer diameter surface of the fixed shell, at this time, the rotating clamp reverses again and slides off the semi-elliptical surface, and is separated from the fixed block.

[0023] As an optimization scheme of the harmful gas early warning sensing device, the limiting component includes a fixed ring arranged on the outer peripheral wall of the fixed shell, and a pointed plug rod rotatably arranged on the fixed ring, the pointed plug rod is connected with the steel cable through a connecting block, the steel cable penetrates through the fixed shell and can be wound on the outer peripheral wall of the T-shaped clasp ring, and the steel cable is retracted or released by rotating the T-shaped clasp ring, so as to control the expansion angle of the pointed plug rod.

[0024] As an optimization scheme of the harmful gas early warning sensing device, the pointed plug rod is rotatably connected with the fixed ring through a rotating shaft, the axis of the rotating shaft is perpendicular to the radial direction of the fixed shell, so that the pointed plug rod can be expanded outward along the outer peripheral direction of the fixed shell and inserted into the surrounding soil to form an at least three-point fixing structure.

[0025] In the scheme, the fixed ring is arranged along the outer peripheral wall of the fixed shell to provide a rotating fulcrum for the pointed plug rod, so that the angle of the pointed plug rod can be flexibly adjusted around the rotating shaft; the pointed plug rod is connected with the steel cable through a connecting block, the steel cable penetrates through the fixed shell and is wound on the outer peripheral wall of the T-shaped clasp ring, when the T-shaped clasp ring is driven to rotate by the motor, the steel cable is retracted or released, when the steel cable is released, the pointed plug rod is expanded outward around the fixed ring under the action of gravity or spring force, the pointed end is inserted into the surrounding soil or rock layer to form a multi-point support fixing; when the steel cable is tightened, the pointed plug rod is retracted towards the outer peripheral wall of the fixed shell, which is convenient for disassembling the device.

[0026] As an optimization scheme of the harmful gas early warning sensing device, the drilling assembly includes a soil guide arranged at the bottom of the fixed shell, a driving ring arranged inside the soil guide, a drill bit connected with the bottom of the driving ring, and a rotating head sleeved outside the drill bit, and the outer wall of the rotating head is provided with a spiral soil guide groove for discharging the dug soil along the soil guide.

[0027] In the scheme, the driving ring is connected with the output end of the motor to drive the drill bit and the external rotating head to rotate at a high speed, so that the underground wall, the top or the ground can be quickly drilled, and the spiral soil guide groove on the outer wall of the rotating head forms a flow guide channel during rotation to discharge the dug soil along the inner wall of the soil guide upwards or outward, so that the dug soil is prevented from accumulating and blocking in the drilling hole, and the drilling process is ensured to be smooth. The scheme not only improves the drilling efficiency of the device under different geological conditions and reduces the risk of drill jamming, but also creates a clean working space for the subsequent expansion and fixing of the limiting component through the directional soil discharge function of the spiral soil guide groove, so that the pointed plug rod can be accurately inserted into the surrounding stable stratum, and the installation stability of the device as a whole is enhanced.

[0028] In summary, compared with the prior art, the present application mainly has the following advantages and beneficial effects:

[0029] 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.

[0030] 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;

[0031] 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

[0032] 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:

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0035] Figure 3 Schematic diagram of the detection cross-section structure of the present invention;

[0036] Figure 4 for Figure 3 The enlarged structural diagram at the mark A in the middle;

[0037] Figure 5 This is a schematic diagram of the installation assembly structure of the present invention;

[0038] Figure 6 This is a schematic diagram of the internal structure of the installation assembly of the present invention;

[0039] Figure 7 for Figure 6 The enlarged structural diagram is shown at mark B in the figure.

[0040] Figure 8 It is a schematic diagram of the cross-sectional structure of the installation component of the present invention.

[0041] Figure 9 for Figure 8An enlarged structural schematic view at a middle mark C.

[0042] Figure 10 For Figure 8 An enlarged structural schematic view at a middle mark D.

[0043] Corresponding component names in the drawings:

[0044] 100-connection unit, 101-connection bottom plate, 200-detection and early warning unit, 201-dustproof assembly, 2011-housing, 2012-arc-shaped filter plate, 2013-filter ring plate, 2014-connection shell, 2015-top shell, 2016-conical amplifier, 2017-sensor, 2018-exhaust fan, 2019-exhaust port, 202-gas detection alarm, 300-mounting unit, 301-driving assembly, 3011-fixing shell, 3012-connection piece, 3013-T-shaped snap ring, 3014-rotary ring, 3015-motor, 3016-transmission rod, 3017-fixing block, 3018-rotary clamping piece, 302-limiting assembly, 3021-fixing ring, 3022-rotary shaft, 3023-sharp-headed insertion rod, 3024-connection block, 3025-steel cable, 303-land drilling assembly, 3031-soil guiding piece, 3032-driving ring, 3033-drill bit piece, 3034-rotary head, 3035-soil guiding groove. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, further detailed description of the present application is made below in combination with examples and drawings, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not limit the present application.

[0046] Example 1

[0047] This example 1 provides a harmful gas early warning sensing device for underground engineering construction process, as shown in the figure, which comprises a connection unit 100, a detection and early warning unit 200 and a mounting unit 300. Figures 1-2 The connection unit 100 comprises a connection bottom plate 101.

[0048] The detection and early warning unit 200 comprises a dustproof assembly 201 bolted to the top of the connection bottom plate 101, and a gas detection alarm 202 bolted to the dustproof assembly 201.

[0049] When detecting harmful gases in the underground construction process, the gas detection alarm 202 enhances the range of gas detection with the assistance of the dustproof assembly 201, and under the action of the dustproof assembly 201, it can also effectively prevent the underground soil and other impurities from falling or adhering to the sensor of the detector, so that the sensor is affected by the soil and other impurities, thereby affecting the occurrence of detection effect.

[0050] The installation unit 300 comprises a driving assembly 301 bolted to the bottom of the connecting bottom plate 101, the driving assembly 301 comprising a fixed shell 3011, a limiting 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 with the limiting assembly 302. During the detection of harmful gas in the process of underground construction, the operator first installs the gas detector in the natural gas mine hole that has been dug. The operator holds the connecting bottom plate 101 to face the drilling assembly 303 to the position where installation is needed. After being well positioned, the driving assembly 301 starts to drive the drilling assembly 303 to rotate, starts to drill a hole at the installation point, and makes the limiting assembly 302 and the driving assembly 301 drilled into the soil. Then the driving assembly 301 rotates in the opposite direction to release the limiting of the limiting assembly 302, so that the limiting assembly 302 expands to the periphery and is inserted into the soil beside, completes a fixation of the whole, and completes the installation of the whole with the detection and early warning unit 200, realizes the start of installation. When the position of the gas detection and alarm instrument 202 needs to be adjusted, the driving assembly 301 continues to rotate in the opposite direction so that the limiting assembly 302 is rotated and tightened and shrunk to the surface of the driving assembly 301. Then the connecting bottom plate 101 is pulled backward to complete the disassembly, realizing quick installation and disassembly.

[0051] Moreover, the gas detection and alarm instrument 202 enhances the range of gas detection with the assistance of the dustproof assembly 201. Under the action of the dustproof assembly 201, the mud and other impurities in the underground can be effectively prevented from falling or adhering to the sensor of the detector, so that the sensor is not affected by the mud and other impurities, the detection effect is not affected, the detection device can be flexibly installed at any position of the underground mine, the interference to the passage and construction of the construction personnel is avoided, the stability of the device is ensured, the expansion and contraction design of the limiting assembly 302 realizes the quick installation and disassembly of the detection device, greatly improves the use efficiency, saves time and labor cost, and the cooperation of the dustproof assembly 201 and the gas detection and alarm instrument 202 not only enhances the detection range, but also prevents the mud from entering the detection sensor, ensures the accuracy and reliability of the detection.

[0052] Embodiment 2

[0053] The embodiment 2 provides a harmful gas early warning sensing device for underground engineering construction process based on the embodiment 1, like Figures 1-4As shown, the embodiment differs from embodiment 1 in that the dustproof assembly 201 comprises a shell 2011 arranged on the top of the connecting bottom plate 101, a connecting shell 2014 arranged on the top of the shell 2011, a top shell 2015 arranged on the top of the connecting shell 2014, and an air outlet 2019 arranged on the top of the top shell 2015, the inside of the shell 2011, the connecting shell 2014 and the top shell 2015 forms a filtering cavity, and a plurality of filtering structures are arranged in the filtering cavity in sequence, and the specific number can be selected according to actual needs, in this embodiment, an arc-shaped filter plate 2012 is mounted on the outer peripheral wall surface of the shell 2011, a filter ring plate 2013 is arranged in the inside of the connecting shell 2014, and the filter ring plate 2013 is connected with the shell 2011, the arc-shaped filter plate 2012 and the filter ring plate 2013 form a hierarchical filtering structure, when detecting harmful gas during underground construction, the air suction machine 2018 starts to work to generate negative pressure in the inside of the filtering cavity, and the suction force is transmitted to the outside air through the arc-shaped filter plate 2012 in the inside of the shell 2011, and the air near the arc-shaped filter plate 2012 is negatively adsorbed, so that the air near the arc-shaped filter plate 2012 enters the inside of the dustproof assembly 201, and the air enters the inside of the shell 2011, and moves upward again, and passes through the filter ring plate 2013 again, and is intercepted and filtered by the filter ring plate 2013 again, and finally the gas is extruded upward by the tapering shape of the tapering amplifying piece 2016, and is detected by the sensor 2017, and is transported to the gas detection alarm instrument 202 for processing, and then the excess gas is discharged through the air outlet 2019.

[0054] Specifically, the outer peripheral wall of the tapering amplifying piece 2016 is connected with the sensor 2017, and the other end of the sensor 2017 is connected with the gas detection alarm instrument 202, the inside of the top shell 2015 is provided with the air suction machine 2018, and the output end of the air suction machine 2018 is connected with the tapering amplifying piece 2016, and the output end of the air suction machine 2018 is connected with the air outlet 2019, after the air near the air suction machine 2018 is completely sucked into the inside of the shell 2011, and passes through the inside of the connecting shell 2014, the sensor 2017 transports the intercepted gas to the inside of the gas detection alarm instrument 202, and the gas detection alarm instrument 202 detects it, if the harmful gas exceeds the threshold value, the gas detection alarm instrument 202 starts to alarm, to prevent natural gas leakage or harmful gas leakage.

[0055] 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.

[0056] Example 3

[0057] 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.

[0058] Before the underground construction, the installation of the gas detector in the underground is needed. When installing, the operator takes the connecting bottom plate 101 and aims the rotating head 3034 at the position where the installation is needed. Then the motor 3015 starts to rotate with the transmission rod 3016 and the driving 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 dig the soil, and the dug soil is transported to the inside of the soil guide 3031 through the soil guide groove 3035, and the soil is discharged from the gap of the soil guide 3031. After the rotating head 3034 completes the digging, the limiting assembly 302 and the outer diameter of the driving assembly 301 are both in the soil, thereby completing the preparation work for the pre-installation.

[0059] Specifically, in the present embodiment, the limiting assembly 302 comprises a fixing ring 3021 arranged on the outer circumferential wall of the fixing shell 3011, a rotating shaft 3022 arranged on the fixing ring 3021, a pointed plug 3023 rotatably arranged on the rotating shaft 3022, a connecting block 3024 arranged on the pointed plug 3023, and a steel cable 3025 arranged on the connecting block 3024, and the steel cable 3025 penetrates through the fixing shell 3011 and is connected with the T-shaped clasp 3013, and the drilling assembly 303 comprises a soil guide 3031 arranged on the bottom of the fixing shell 3011, a driving ring 3032 arranged inside the soil guide 3031, a drill bit 3033 arranged on the bottom of the driving ring 3032, a rotating head 3034 arranged outside the drill bit 3033, and a soil guide groove 3035 arranged on the rotating head 3034. When the motor 3015 rotates reversely, the transmission rod 3016 also rotates reversely with the rotating clasp 3018 on the outer diameter of the transmission rod 3016, and the rotating clasp 3018 is clamped on the fixing block 3017 during the reverse rotation of the rotating clasp 3018. When the rotating clasp 3018 rotates forwardly, the rotating clasp 3018 is extruded and slides on the surface of the fixing block 3017 due to the semi-elliptical shape of the fixing block 3017, but when the rotating clasp 3018 rotates reversely, the rotating clasp 3018 is clamped on the fixing block 3017 to rotate reversely with the fixing block 3017. At the same time, the rotating ring 3014 also rotates reversely, and the T-shaped clasp 3013 also rotates reversely, so that the steel cable 3025 wound on the outer diameter of the T-shaped clasp 3013 is detached, and the pointed plug 3023 fixed at the other end of the steel cable 3025 is expanded around under the action of the rotating shaft 3022. By lifting the connecting bottom plate 101 upward, the expanded pointed plug 3023 is inserted into the surrounding soil, so as to complete the rapid installation. When the position of the gas detector needs to be adjusted, the motor 3015 continues to rotate reversely, so that the rotating ring 3014 rotates again with the T-shaped clasp 3013, the steel cable 3025 on the outer diameter of the T-shaped clasp 3013 is contracted, the pointed plug 3023 is pulled tight and contracted to the outer diameter surface of the fixing shell 3011, and the connecting bottom plate 101 is lifted out, so as to complete the disassembly, and the functions of rapid installation and rapid disassembly can be achieved.

[0060] In use, before the underground construction, the gas detector needs to be installed in the underground. When installing, the operator holds the connecting bottom plate 101 and aims the rotating head 3034 at the position where the installation is needed. Then the motor 3015 starts to rotate with the transmission rod 3016 and the driving ring 3032 at the bottom of the transmission rod 3016, and at the same time, the drill bit 3033 also starts to rotate with the rotating head 3034 to dig the soil, and the dug soil is transported to the inside of the soil guide 3031 through the soil guide groove 3035, and the soil is discharged from the gap of the soil guide 3031. After the rotating head 3034 finishes digging, the limiting assembly 302 and the outer diameter of the driving assembly 301 are both in the soil, thereby completing the preparation work for pre-installation.

[0061] When the motor 3015 rotates reversely, the transmission rod 3016 also rotates reversely with the rotating clamping piece 3018 on the outer diameter of the transmission rod 3016, and the rotating clamping piece 3018 is clamped on the fixed block 3017 during the reverse rotation. When the rotating clamping piece 3018 rotates forward, it will be squeezed and slide off the surface of the fixed block 3017, but when the rotating clamping piece 3018 rotates reversely, it will be clamped on the fixed block 3017, so that the rotating clamping piece 3018 rotates reversely with the fixed block 3017, and at the same time, the rotating ring 3014 also starts to rotate reversely. When the rotating ring 3014 rotates reversely, the T-shaped clamping ring 3013 also starts to rotate, so that the steel cable 3025 wound on the outer diameter of the T-shaped clamping ring 3013 falls off, and the sharp head insertion rod 3023 fixed at the other end of the steel cable 3025 expands around under the action of the rotating shaft 3022, and by lifting the connecting bottom plate 101 upwards, the expanded sharp head insertion rod 3023 is inserted into the surrounding soil, thereby completing the rapid installation. When the position of the gas detector needs to be adjusted, the motor 3015 continues to rotate reversely, so that the rotating ring 3014 rotates again with the T-shaped clamping ring 3013, so that the steel cable 3025 on the outer diameter of the T-shaped clamping ring 3013 is contracted, and the sharp head insertion rod 3023 is pulled tight and contracted to the outer diameter surface of the fixed shell 3011, and at the same time, the connecting bottom plate 101 is taken out, and the disassembly is completed. The function of rapid installation and disassembly can be achieved, so that the detection equipment can be flexibly installed at any position of the underground mine, avoiding the interference of the construction personnel and the construction, and ensuring the stability of the equipment. The rapid installation and disassembly of the detection equipment are realized, and the use efficiency is greatly improved, and the time and labor cost are saved.

[0062] It should be noted here that 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, the rotating clamp 3018 only slides without engaging because the sharp head insertion rod 3023 is in a retracted state during forward rotation. At this time, the driving drilling assembly 303 is rotated to drill into the ground. When the drilling is completed and the fixing device is needed, the motor 3015 reverses rotation, the rotating clamp 3018 clamps the fixed block 3017, and then drives the T-shaped clasp ring 3013 to rotate synchronously, so that the steel cable 3025 wound on the outer diameter of the T-shaped clasp ring 3013 is retracted and expanded, the sharp head insertion rod 3023 of the limiting component 302 is expanded outward around the rotating shaft and inserted into the surrounding soil to form a stable fixation. Conversely, when disassembling, the motor 3015 is reversed again, and when the steel cable 3025 is retracted to pull the sharp head insertion rod 3023 to retract to the surface of the fixed shell 3011, the rotating clamp 3018 is separated from the fixed block 3017.

[0063] At the same time, combined with the cooperation of the dustproof assembly 201 and the gas detection alarm instrument 202, not only the detection range is enhanced, but also the soil is prevented from entering the detection sensor, ensuring the accuracy and reliability of the detection, and solving the problem of limited installation position, easy to tip over or damage of the traditional detection equipment, avoiding the phenomenon of reduced detection range, false alarm or missing report caused by thin underground gas and poor installation position.

[0064] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

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), wherein the driving assembly (301) drives the ground drilling assembly (303) to rotate in a forward direction and drill into the ground via a motor (3015), and the limiting assembly (302) forms a linkage structure with the T-shaped clamping ring (3013) via a steel cable (3025); The driving assembly (301) further comprises a connecting member (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 outer diameter of the connecting member (3012) is sleeved with the T-shaped clamp (3013); a rotating ring (3014) and a fixed block (3017) are provided inside the T-shaped clamp (3013) for cooperating with the rotating clamp (3018); and one end of the fixed block (3017) is semi-elliptical in shape. When the motor (3015) rotates in the forward direction, the rotating clamp (3018) squeezes and slides along the semi-elliptical surface of the fixed block (3017) without being engaged, and only drives the drilling assembly (303) to rotate; when ... During reverse rotation, the rotating clamp (3018) engages with the non-elliptical end of the fixed block (3017), driving the T-shaped clamp (3013) to rotate synchronously to retract and release the steel cable (3025), driving the pointed rod (3023) of the limiting assembly (302) to expand toward the outer periphery of the fixed shell (3011) and insert into the surrounding soil. When the motor (3015) continues to rotate in the reverse direction, the pointed rod (3023) retracts to the surface of the fixed shell (3011); when the pointed rod (3023) is completely retracted, the rotating clamp (3018) and the fixed block (3017) are automatically separated.

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 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).

7. The harmful gas early warning sensor device used in underground engineering construction according to claim 6, 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.

8. 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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