Underground gas environment detection method and device

Abstract

The invention relates to the technical field of underground safety detection, in particular to an underground gas environment detection method and device, and the method comprises the following steps: 1, detection device installation: fixing the detection device on the body of a user; step 2, adjusting the detection equipment: adjusting the detection equipment to a required detection distance position for detection; 3, airflow driving: driving harmful gas in a local space with poor air flowability to be mixed into a large environment to improve detectability; 4, preliminary detection of airflow: monitoring the amount of harmful gas in the environment in front of the user; and step 5, gas flow collection: intercepting gas entering the interior so as to sample harmful gas. According to the device, through the arrangement of the detection method, on one hand, potential safety hazards caused by high concentration in a local area are avoided, and on the other hand, the probability that the harmful gas is detected is improved, so that the detection probability of the harmful gas is improved.

Description

Technical Field

[0001] The present invention relates to the field of underground safety detection, and particularly to a method and device for detecting the underground gas environment. Background Art

[0002] The detection of toxic and harmful gases underground refers to the process of real-time monitoring and analysis of toxic and harmful gases that may exist in the underground air in underground mines, coal mines, tunnel construction, and other underground working environments through scientific detection methods and technical means. Its purpose is to timely discover and warn of potential gas hazards, ensure the safety of the lives and physical health of workers, and at the same time ensure the safety of the underground working environment.

[0003] When detecting toxic gases underground, if the air flow in the underground is poor and the diffusion of toxic gases is uneven, it may lead to the omission of local high-concentration areas during monitoring, resulting in the detection device not detecting toxic gases during monitoring, and potential safety hazards may occur when workers accidentally reach high-concentration areas during movement. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a method and device for detecting the underground gas environment.

[0005] In the first aspect, the present invention provides a method for detecting the underground gas environment, including the following steps:

[0006] Step 1. Installation of the detection device: Fix the detection device on the user's body, and fix the lightweight detection end of the detection device on the safety helmet worn by the user;

[0007] Step 2. Adjustment of the detection device: Adjust the telescopic length of the lightweight detection end of the detection device according to the distance to be detected, so as to adjust to the required detection distance position for detection;

[0008] Step 3. Airflow driving: The lightweight detection end of the detection device is located in front of the user, and the detection device drives the gas in front of the user to flow, so as to drive the harmful gases in the local space with poor air flow to mix into the large environment to improve detectability;

[0009] Step 4. Preliminary detection of the airflow: When the detection device drives the airflow to flow, during the driving process, the airflow entering the detection device is preliminarily detected to monitor the amount of harmful gases in the environment in front of the user;

[0010] Step 5. Airflow collection: When the amount of harmful gases in the gas in front of the user detected reaches the set threshold, the detection device intercepts the gas entering the interior to sample the harmful gases.

[0011] In a second aspect, a downhole gas environment detection device is provided, which is applicable to a downhole gas environment detection method, comprising:

[0012] The housing is detachably fixed to the user via a mounting buckle;

[0013] A controller, fixed on the housing;

[0014] The lightweight detection end is detachably fixed to the helmet on the user's head through a fixing assembly. The lightweight detection end includes a rear airflow pre-assembly and an airflow driving assembly. The rear airflow pre-assembly is used to drive the detected gas behind the user to flow in front of the user. The airflow driving assembly is used to drive the gas flow in front of the user after adjusting to an appropriate distance, and detect harmful gases in the airflow during the driving process.

[0015] a sampling assembly installed inside the housing and connected to the airflow drive assembly; when the airflow drive assembly does not detect the presence of harmful gases in the gas, the sampling assembly connects to the airflow drive assembly to allow the airflow to flow smoothly; when the airflow drive assembly detects the presence of harmful gases in the gas, the sampling assembly intercepts and samples the flowing airflow, and after sampling, switches to the next sampling position to connect to allow the airflow to flow;

[0016] When workers go down the mine and need to conduct real-time safety detection of the underground environment, the user fixes the shell to the body through the detachable mounting buckle, and fixes the lightweight detection end to the safety helmet worn on the head through the detachable fixing component;

[0017] The fixing component can be a negative pressure component, including a fixing strip, on the inside of which a negative pressure suction cup is fixed. When fixing, the negative pressure suction cup is attached to the safety helmet by connecting an external negative pressure pump, and then the air inside the negative pressure suction cup is extracted by the negative pressure pump, so that the fixing strip is fixed to the safety helmet by negative pressure, thereby achieving the fixation of the lightweight detection end;

[0018] After completing the fixation of the lightweight detection end, the length of the lightweight detection end is adjusted to adjust the distance between the lightweight detection end and the front of the user, thereby realizing detection of a specified distance in front of the user, and the airflow driving component is used to drive the gas in front of the user to drive the airflow, so that the airflow can form a flow in front of the user, thereby the flow of the airflow makes the airflow in the space in front of the user not stagnant. On the one hand, the flow of the airflow avoids the occurrence of safety hazards caused by high concentrations in local areas. On the other hand, the flow of the airflow makes it possible for any high-concentration harmful gas in a local area to be mixed into a space within a larger range by the flow of the airflow, thereby increasing the probability of the harmful gas being detected, which is conducive to improving the probability of detecting the harmful gas.

[0019] Meanwhile, when the air flow driving component drives the air flow, it makes the air flow through the interior of the air flow driving component. After the air flow enters the interior of the air flow driving component, the air flow driving component detects the air flow to identify harmful gases in the air flow, thereby realizing the preliminary detection of harmful gases.

[0020] When the air flow driving component detects harmful gases, the sampling component intercepts and samples the air flow flowing into the interior of the air flow driving component, thereby sampling and retaining the detected harmful gases, which is conducive to subsequent further detection and analysis of the harmful gases, and is conducive to subsequent precise analysis of the gas and implementation of corresponding measures to improve the safety of underground detection.

[0021] The setting of the post-airflow pre-positioning component can drive the gas in the space behind the user, that is, the gas that has been detected by the air flow driving component, to the front of the user, so that the detected air flow disperses the air flow in front of the user, which is conducive to avoiding the situation that the user is interfered by the toxic gas in front during the movement and causing potential safety hazards.

[0022] Preferably, the post-airflow pre-positioning component includes:

[0023] Two circulation pipes, installed through the fixing component, and one ends of the two circulation pipes face the front of the user and are arranged oppositely.

[0024] Two first hoses, and one ends of the two first hoses are fixedly communicated with the other ends of the two circulation pipes respectively.

[0025] Two first air pumps, symmetrically fixed inside the housing, and the other ends of the two first hoses are respectively communicated with the output ends of the two first air pumps.

[0026] Two air inlets, one ends of the two air inlets are respectively communicated with the input ends of the two first air pumps, and the other ends of the two air inlets respectively penetrate through the side wall of the housing and are communicated with the outside.

[0027] After the first air pump is started, it drives the air flow to flow, and the flowing air flow flows through the paths of the air inlet, the first air pump, the first hose, and the circulation pipe, so as to drive the detected air flow behind the user to the front of the user, so that the gas in the area in front of the user is dispersed by the detected air flow, which is conducive to improving the safety of the user.

[0028] The setting of the first hose enables the post-airflow pre-positioning component to be installed for workers of different body types, which is conducive to improving the adaptability of the post-airflow pre-positioning component.

[0029] Preferably, the airflow drive assembly comprises:

[0030] Two detection tubes are installed through the fixing assembly;

[0031] Two second hoses are respectively fixed to one end of the two detection tubes;

[0032] A U-shaped tube fixed inside the housing, one end of the U-shaped tube being connected to one of the second hoses;

[0033] A second air pump is fixed inside the housing, and the other end of the U-shaped tube and another second hose are fixedly connected to the output end and the input end of the second air pump respectively;

[0034] Two first installation boxes are respectively installed at the other ends of the two detection tubes;

[0035] Two detectors are respectively fixed inside the two first installation boxes and are respectively connected between the other ends of the two detection tubes and the ports provided on the first installation boxes;

[0036] After the second air pump is started, it drives the airflow, so that the airflow enters along the port on one side, and then flows along the path of the first installation box on one side, the detection tube on one side and the second hose on one side, the sampling assembly, the U-shaped tube, the second air pump, the second hose on the other side, the detection tube on the other side, and the first installation box on the other side, until it is discharged through the port on the other side to form a cycle, so that the airflow can form a flow cycle, and the blown airflow can drive the gas in front of the user to form a flow, so as to drive the high-concentration harmful gas in the local area to diffuse through the airflow, so as to reduce the concentration of the harmful gas, and is conducive to expanding the detection range of toxic gas and improving the detection probability of harmful gas;

[0037] When the gas passes through the interior of the first installation box, the detector can detect the passing airflow, and issue a prompt when harmful gas is detected, thereby warning the user of the harmful gas.

[0038] Preferably, the airflow drive assembly further comprises:

[0039] Two telescopic tubes are respectively slidably inserted into the interiors of the two detection tubes, and the two telescopic tubes are respectively fixedly connected to the two first installation boxes;

[0040] Two second installation boxes are respectively fixedly mounted on the outer rings of the two detection tubes;

[0041] Two first racks are fixed to the ends of the two telescopic tubes through their ends respectively, and are slidably connected to the outer wall of the detection tube;

[0042] Two first motors are respectively fixed inside the two second mounting boxes, and the output shafts of the two first motors are fixed with first gears, and the two first gears are respectively meshed with the two first racks;

[0043] After the first motor is started, the output shaft drives the first gear connected to it to rotate. After the first gear rotates, it drives the first rack meshing with it to move. After the first rack moves, it drives the telescopic tube fixed to it to move, thereby driving the telescopic tube to extend and retract. After the telescopic tube is extended, the distance between the end and the user can be adjusted, so that the airflow can be detected at a specified distance in front of the user, which helps to avoid the situation where the user inhales toxic gas due to a short detection distance, which may cause a safety hazard.

[0044] Preferably, the airflow drive assembly further comprises:

[0045] Two steering buckets are rotatably mounted on the ends of the two ports respectively;

[0046] Two second gears are respectively fixed to the outer rings of the two steering buckets;

[0047] Two second motors are fixed inside the two first installation boxes respectively, and the output shafts of the two second motors are fixed with third gears, and the two third gears are respectively engaged with the two second gears;

[0048] After the second motor is started, it can drive the third gear connected to it to rotate through the output shaft. After the third gear rotates, it drives the second gear meshed with it to rotate. After the second gear rotates, it drives the steering bucket to rotate, thereby adjusting the inlet or outlet angle of the airflow;

[0049] When the two turning buckets are arranged facing each other, the airflow can be discharged from one turning bucket and then enter along the other turning bucket, thereby slowing down the flow of the airflow while slowing down the flow rate of the airflow, which is beneficial for slowing down the flow rate of the airflow when toxic gas is detected to reduce the diffusion of the toxic gas, thereby facilitating the detection of the concentration of the toxic gas, and making it easier for users to judge the underground environment;

[0050] When the two turning buckets are arranged back to back, the airflow can be discharged from one turning bucket and then enter the other turning bucket after being turned, thereby expanding the flow area of the airflow and enhancing the fluidity of the airflow. This is beneficial for dispersing the high-concentration toxic gas to reduce the concentration of the toxic gas when there is a high concentration of toxic gas in a local area, and for increasing the range of the toxic gas to increase the possibility of detecting the toxic gas.

[0051] Preferably, the sampling assembly comprises:

[0052] Two fixing frames are symmetrically fixed inside the shell, and the two fixing frames pass through the U-shaped tube to separate the U-shaped tube into two sections. The side walls of the two fixing frames are each provided with a first communication port, and the two first communication ports are respectively connected to the two sections of the U-shaped tube;

[0053] Two transmission bars are respectively installed on opposite sides of the two fixing frames;

[0054] A plurality of sampling tubes are arranged in a linear array along the track of the fixing frame and installed between the two transmission bars. The side walls of the two transmission bars are penetrated by a plurality of second communication ports corresponding to the sampling tubes. When the two aligned second communication ports are moved to align with the first communication ports, the corresponding sampling tubes are connected to the U-shaped tube;

[0055] A driving mechanism, mounted on the fixing frame, for driving the transmission bar;

[0056] The driving mechanism is used to drive the transmission bar to drive, and the transmission bar drives the sampling tube to move. When the sampling tube is aligned with the first connecting port, the sampling tube is connected to the U-shaped tube, so that the airflow can pass through the sampling tube when flowing along the U-shaped tube. When sampling is required, the driving mechanism drives the transmission bar to drive the sampling tube to move, and the sampling tube drives the internal gas to move synchronously. After the sampling tube moves away from the first connecting port, both ends of the sampling tube are blocked by the fixing frame. The opposite surfaces of the two fixing frames are provided with sealing rubber sheets, so that the gas can remain in the sampling tube to complete the sampling, and the latter sampling tube moves to a position aligned with the first connecting port, so that the airflow can flow smoothly.

[0057] Preferably, the driving mechanism comprises:

[0058] Two second racks are respectively fixed on the inner ring walls of the two transmission bars;

[0059] Two groups of fifth gears are symmetrically mounted between the two fixing frames, the two fifth gears located at the same end form a group, the fifth gears in the same group are coaxially connected, and the two fifth gears in the same group are respectively meshed with the two second racks;

[0060] A third motor is fixed to a side wall of the fixing frame, wherein the output shaft of the third motor is coaxially fixed with two fourth gears, and the two fourth gears are respectively engaged with a group of two fifth gears;

[0061] After the third motor is started, it drives the fourth gear connected to it to rotate through the output shaft. After the fourth gear rotates, it drives the fifth gear meshing with it to rotate. After the fifth gear rotates, it drives the second rack meshing with it to transmit. The second rack drives the transmission bar to transmit, thereby realizing the drive of the transmission bar.

[0062] Preferably, the sampling tube comprises:

[0063] Two third connecting pipes, respectively fixed to opposite sides of the two transmission bars and connected to the second communication port;

[0064] Two plug-in tubes, respectively sealed and plugged with the two third connecting tubes via convex teeth;

[0065] Two second fixing rings, respectively fixed to opposite ends of the two plug-in tubes;

[0066] Two first fixing rings are rotatably mounted on opposite ends of the two second fixing rings through limiting teeth for sealing, and rubber sheets are fixed between opposite ends of the two first fixing rings and the two second fixing rings respectively;

[0067] A first connecting pipe and a second connecting pipe are fixed to opposite ends of the two first fixing rings, respectively, and the first connecting pipe and the second connecting pipe are connected and matched via a telescopic mechanism;

[0068] After the sampling tube has completed sampling, when the sampling tube needs to be taken out, the user rotates the first connecting tube and the second connecting tube to drive the two first fixing rings to rotate. The two first fixing rings rotate relative to the second fixing ring. When the second fixing ring and the first fixing ring rotate relative to each other, the rubber sheet is driven to twist, so that the rubber sheet forms a seal after twisting, thereby sealing the gas in the area between the two rubber sheets, thereby achieving gas sampling. The plug-in tube and the third connecting tube are sealed and plugged in by the convex teeth, so that the sampling tube can be plugged in and out, and the setting of the convex teeth ensures that the plug-in tube will not rotate synchronously with the first fixing ring under the drive of the second fixing ring, affecting the seal;

[0069] A sealing drive device is arranged inside the shell, and the sealing drive device includes a sealing motor and a sealing gear. The sealing motor drives the sealing gear to rotate. The sealing gear includes a sealing drive gear and a sealing driven gear. There are multiple sealing driven gears, which are respectively fixed to the outer rings of the first connecting tube and the second connecting tube. The sealing driven gear is driven by the sealing motor to rotate, thereby driving the first connecting tube and the second connecting tube to rotate, thereby driving the rubber sheet to twist and form a seal. The sampling tube moves after sampling, driving the sealing driven gears on the first connecting tube and the second connecting tube to move to a position meshing with the sealing drive gear, thereby sealing the gas inside the sampling tube after sampling, which is beneficial to avoid the leakage of harmful gas inside the sampling tube after sampling.

[0070] Preferably, the telescopic mechanism comprises:

[0071] a sleeve, fixed to the end of the first connecting pipe and movably sleeved on the outer ring of the second connecting pipe;

[0072] Two pressing handles, respectively fixed on the outer walls of the first connecting tube and the second connecting tube;

[0073] a spring, fixed between the first connecting pipe and the second connecting pipe;

[0074] Two sealing strips are symmetrically fixed to the two ends of the inner wall of the sleeve;

[0075] When the user presses the two pressing handles, the first connecting tube and the second connecting tube are moved closer to each other, thereby shortening the overall length of the sampling tube, so that the sampling tube can be taken out from between the two third connecting tubes, thereby facilitating the removal of the sample after sampling;

[0076] After the sampling tube is installed, the spring pushes the first connecting tube and the second connecting tube away from each other, thereby promoting a tight connection between the plug-in tube and the third connecting tube, which helps to prevent the sampling tube from falling off.

[0077] Compared with the prior art, the present invention has the following beneficial effects:

[0078] 1. The present invention, through the setting of the detection method, enables the airflow to form a flow in front of the user, so that the airflow inside the space in front of the user will not be stagnant through the flow of the airflow. On the one hand, the flow of the airflow avoids the occurrence of safety hazards caused by high concentrations in local areas. On the other hand, through the flow of the airflow, if there is a high concentration of harmful gas in a local area, it can be mixed into a space in a larger range by the flow of the airflow, thereby increasing the probability of harmful gases being detected, which is conducive to improving the probability of detecting harmful gases.

[0079] 2. The present invention drives the detected airflow behind the user to the front of the user through the setting of the rear airflow front component, so that the gas inside the front area of the user is dispersed by the detected airflow, which is beneficial to improving the safety of the user.

[0080] 3. The present invention intercepts and samples the airflow flowing into the airflow drive component through the setting of the sampling component, thereby sampling and retaining the detected harmful gas, which is conducive to further detection and analysis of the harmful gas, thereby facilitating the subsequent accurate analysis of the gas and implementing corresponding measures to improve the safety of underground detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 Schematic diagram of the detection method of the present invention.

[0082] Figure 2 This is a schematic structural diagram of the detection equipment used in the present invention.

[0083] Figure 3 Structural schematic diagram after profiling along the detection tube of the present invention Figure 1 .

[0084] Figure 4 Of the present invention Figure 3 Enlarged structural schematic diagram of location A in

[0085] Figure 5 Structural schematic diagram after profiling along the detection tube of the present invention Figure 2 .

[0086] Figure 6 Internal structural schematic diagram of the housing of the present invention Figure 1 .

[0087] Figure 7 Internal structural schematic diagram of the housing of the present invention Figure 2 .

[0088] Figure 8 Structural schematic diagram after profiling of the sampling assembly of the present invention

[0089] Figure 9 Of the present invention Figure 8 Enlarged structural schematic diagram of location B in

[0090] Fig.10 Structural schematic diagram after partial profiling of the sampling tube of the present invention

[0091] In the figure: 1. Housing; 101. Controller; 2. Fixed strip; 201. Circulation pipe; 202. First hose; 203. Air inlet; 204. First air pump; 3. Detection tube; 301. Second hose; 302. U-shaped tube; 303. Second air pump; 304. First installation box; 305. Detector; 306. Port; 4. Telescopic tube; 401. First rack; 402. Second installation box; 403. First motor; 404. First gear; 5. Second gear; 501. Third gear; 502. Steering bucket; 503. Second motor; 6. Fixed frame; 601. Transmission strip; 602. Second rack; 603. Third motor; 604. Fourth gear; 605. Fifth gear; 701. First connecting pipe; 702. Second connecting pipe; 703. First fixing ring; 704. Second fixing ring; 705. Insertion pipe; 706. Third connecting pipe; 707. Convex teeth; 708. Rubber sheet; 709. Sleeve; 710. Limiting teeth; 711. Pressing handle. Detailed implementation manners

[0092] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and other obvious variations can be conceived by those skilled in the art.

[0093] As Figure 1 A method for detecting a downhole gas environment is shown, comprising the following steps:

[0094] Step 1: Install the detection device: Fix the detection device on the user's body, and fix the lightweight detection end of the detection device on the user's helmet;

[0095] Step 2: Adjust the detection device: Adjust the lightweight detection end of the detection device to the required detection distance according to the required detection distance.

[0096] Step 3: Airflow drive: The lightweight detection end of the detection device is located in front of the user. The detection device drives the air flow in front of the user, so as to drive the harmful gases in the local space with poor air flow into the larger environment to improve detectability.

[0097] Step 4: Preliminary airflow detection: When the detection device drives the airflow, the airflow entering the detection device is preliminarily detected during the driving process to monitor the amount of harmful gases in the environment in front of the user;

[0098] Step 5: Airflow collection: When the amount of harmful gases in the environment in front of the user is detected to reach a set threshold, the detection equipment intercepts the gas entering the interior to sample the harmful gases.

[0099] like Figures 2 to 10 The downhole gas environment detection device shown is applicable to a downhole gas environment detection method, including:

[0100] The housing 1 is detachably fixed to the user through a mounting buckle;

[0101] Controller 101, fixed on housing 1;

[0102] The lightweight detection end is detachably fixed to the helmet on the user's head through a fixing assembly. The lightweight detection end includes a rear airflow pre-assembly and an airflow driving assembly. The rear airflow pre-assembly is used to drive the detected gas behind the user to flow in front of the user. The airflow driving assembly is used to drive the gas flow in front of the user after adjusting to an appropriate distance, and detect harmful gases in the airflow during the driving process.

[0103] The sampling assembly is installed inside the housing 1 and is connected to the airflow driving assembly. When the airflow driving assembly does not detect the presence of harmful gases in the gas, the sampling assembly is connected to the airflow driving assembly to allow the airflow to flow smoothly. When the airflow driving assembly detects the presence of harmful gases in the gas, the sampling assembly intercepts and samples the flowing airflow, and after sampling, switches to the next sampling position to connect and allow the airflow to flow;

[0104] When detecting toxic gases underground, if the air flow underground is poor and the diffusion of toxic gases underground is uneven, it may cause local high-concentration areas to be missed during monitoring, resulting in the detection device failing to detect toxic gases during monitoring, and workers accidentally reaching high-concentration areas during movement, posing a safety hazard;

[0105] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. When workers go down the well and need to detect the underground environment in real time, the user fixes and installs the housing 1 on the body through a detachable mounting buckle. In the relevant structures of this device, most of the mechanisms with a certain gravity are installed inside the housing 1, such as the sampling component and the battery that provides power for the whole device. There is an installation box for installing the battery on the housing 1, and the installation box is a detachable structure. When this device needs to be used in a large-scale environment, the user needs to move and change positions. At this time, by setting the installation box and the internal battery, and using the battery as the power source, when moving in a specified range, an external power source can be used to extend the service time of the device. At this time, the user's activity space is small, and the power cord of the external power source can cover the user's movement space, so using the external power source can avoid the situation where the device pauses due to insufficient electric energy. Here, providing electric energy through installing a detachable battery or an external power source is a mature existing technology and will not be elaborated here. Subsequently, the lightweight detection end is fixed on the safety helmet worn on the head through a detachable fixing component;

[0106] It should be noted that the materials used for the lightweight detection end are all corrosion-resistant lightweight materials, such as polyurethane in polymer materials or carbon fiber reinforced plastics in composite materials, and some lightweight alloys with high strength and corrosion resistance. These materials can all achieve the effects of corrosion resistance, wear resistance, and light weight, and can be selected according to cost and requirements during production, so that the lightweight detection end can not only be corrosion-resistant and wear-resistant to extend its service life during use underground, but also achieve a lightweight effect when installed on the user's safety helmet, avoiding causing a large burden on the user's head;

[0107] The fixing component can be selected as a negative pressure component, including a fixing strip 2. A negative pressure suction cup is fixed inside the fixing strip 2. When fixing, by connecting an external negative pressure pump, the negative pressure suction cup is attached to the safety helmet, and then the air inside the negative pressure suction cup is pumped out by the negative pressure pump, so that the fixing strip 2 is fixed on the safety helmet through negative pressure, thus realizing the fixation of the lightweight detection end;

[0108] After completing the fixation of the lightweight detection end, the length of the lightweight detection end is adjusted to adjust the distance between the lightweight detection end and the front of the user. When the length of the lightweight detection end is shortened, the lightweight detection end is close to the user's head. When it is close to the user's head, it can detect the ambient gas in front of the user in real time. At this time, the lightweight detection end is concentrated on the top of the user's head, which can facilitate the user's activities underground and reduce the inconvenience caused by the length. When the length is extended, it can achieve detection of a specified distance in front of the user. The gas in front of the user is driven by the airflow driving component to drive the airflow so that the airflow can form a flow in front of the user, thereby preventing the airflow in the space in front of the user from being stagnant. On the one hand, the flow of the airflow avoids the occurrence of safety hazards caused by high concentrations in local areas. On the other hand, the flow of the airflow allows any high-concentration harmful gas in a local area to be mixed into a larger space by the flow of the airflow, thereby increasing the probability of the harmful gas being detected, which is conducive to improving the probability of detecting the harmful gas.

[0109] At the same time, when the airflow driving component drives the airflow, the airflow flows through the interior of the airflow driving component. After the airflow enters the interior of the airflow driving component, the airflow driving component detects the airflow, thereby identifying harmful gases in the airflow, thereby achieving preliminary detection of harmful gases;

[0110] When the airflow drive assembly detects harmful gas, the sampling assembly intercepts and samples the airflow flowing into the airflow drive assembly, thereby sampling and retaining the detected harmful gas, which is conducive to subsequent further detection and analysis of the harmful gas, thereby facilitating subsequent accurate analysis of the gas and implementing corresponding measures to improve the safety of underground detection;

[0111] The setting of the rear airflow front component can drive the gas inside the space after the user passes, that is, the gas that has been detected by the airflow driving component, to the front of the user, so that the detected airflow disperses the airflow in front of the user, which is helpful to avoid the user being disturbed by the toxic gas in front of the user during movement and causing safety hazards.

[0112] As an optional embodiment, the rear airflow pre-assembly includes:

[0113] Two circulation pipes 201 are installed by a fixing assembly, with one end of the two circulation pipes 201 facing in front of the user and arranged opposite to each other;

[0114] Two first hoses 202, one end of each of the two first hoses 202 is fixedly connected to the other end of each of the two circulation pipes 201;

[0115] Two first air pumps 204 are symmetrically and fixedly arranged inside the housing 1, and the other ends of two first hoses 202 are respectively communicated with the output ends of the two first air pumps 204;

[0116] Two air inlets 203, one ends of the two air inlets 203 are respectively communicated with the input ends of the two first air pumps 204, and the other ends of the two air inlets 203 respectively penetrate through the side wall of the housing 1 and are communicated with the outside;

[0117] After the first air pump 204 is started, it drives the air flow to flow. The flowing air flow flows through the air inlet 203, the first air pump 204, the first hose 202, and the circulation pipe 201, so as to drive the detected air flow behind the user to the front of the user, so that the gas inside the area in front of the user is dispersed by the detected air flow, which is beneficial to improving the safety of the user;

[0118] The arrangement of the first hose 202 enables the rear air flow front - end component to be installed for staff of different body types, which is beneficial to improving the adaptability of the rear air flow front - end component.

[0119] As an alternative embodiment, the air flow driving component includes:

[0120] Two detection tubes 3, which are installed through a fixing component;

[0121] Two second hoses 301 are respectively fixed to one ends of the two detection tubes 3;

[0122] A U - shaped tube 302 is fixed inside the housing 1, and one end of the U - shaped tube 302 is communicated with one of the second hoses 301;

[0123] A second air pump 303 is fixed inside the housing 1, and the other end of the U - shaped tube 302 and the other second hose 301 are respectively fixedly communicated with the output end and the input end of the second air pump 303;

[0124] Two first mounting boxes 304 are respectively installed at the other ends of the two detection tubes 3;

[0125] Two detectors 305 are respectively fixed inside the two first mounting boxes 304, and are respectively communicated between the other ends of the two detection tubes 3 and the ports 306 arranged on the first mounting boxes 304;

[0126] After the second air pump 303 starts, it drives the airflow to flow. The airflow enters through the port 306 on one side, and then flows along the path of the first mounting box 304 on one side, the detection tube 3 on one side, the second hose 301 on one side, the sampling assembly, the U-shaped tube 302, the second air pump 303, the second hose 301 on the other side, the detection tube 3 on the other side, and the first mounting box 304 on the other side, until it is discharged through the port 306 on the other side to form a cycle. Thus, the airflow can form a flowing cycle, and the blown airflow can drive the gas in front of the user to flow, so as to drive the high-concentration harmful gas in the local area to diffuse through the airflow, reduce the concentration of harmful gas, and is beneficial to expanding the detection range of toxic gas and increasing the detection probability of harmful gas;

[0127] When the gas passes through the inside of the first mounting box 304, the detector 305 can detect the passing airflow, and thus issue a prompt when harmful gas is detected, so as to give a warning of harmful gas to the user. The detector 305 adopts a micro-miniature gas detection device to reduce the occupied space and weight, so as to avoid causing a burden on the user's head. The TGS8100 gas sensor of Figaro Engineering Inc. or the ultra-miniature sensor module of Shenzhen SGA Technologies Co., Ltd. is used, and the body environment is preliminarily monitored through these miniature sensors.

[0128] As an alternative embodiment, the airflow driving assembly further includes:

[0129] Two telescopic tubes 4 are respectively slidably inserted into the inside of the two detection tubes 3, and the two telescopic tubes 4 are respectively fixedly connected to the two first mounting boxes 304;

[0130] Two second mounting boxes 402 are respectively fixedly sleeved on the outer circles of the two detection tubes 3;

[0131] Two first racks 401 are respectively fixed to the ends of the two telescopic tubes 4 through the ends, and are slidably connected to the outer walls of the detection tubes 3;

[0132] Two first motors 403 are respectively fixed inside the two second mounting boxes 402. The output shafts of the two first motors 403 are both fixed with first gears 404, and the two first gears 404 are respectively engaged with the two first racks 401;

[0133] After starting, the first motor 403 drives the first gear 404 connected to it to rotate through the output shaft. The first gear 404 here does not need to carry a high load and can be made of a lightweight, corrosion-resistant plastic material. After the first gear 404 rotates, it drives the first rack 401 engaged with it to move. After the first rack 401 moves, it drives the telescopic tube 4 fixed to it to move, thereby driving the telescopic tube 4 to extend and retract. After the telescopic tube 4 is extended, the distance between the end and the user can be adjusted, so that the airflow can be detected at a specified distance in front of the user, which helps to avoid the situation where the user inhales toxic gases due to a short detection distance, which may cause a safety hazard.

[0134] As an optional embodiment, the airflow drive assembly further includes:

[0135] Two steering buckets 502 are rotatably mounted on the ends of the two ports 306;

[0136] Two second gears 5 are respectively fixed to the outer rings of the two steering buckets 502;

[0137] The two second motors 503 are fixed inside the two first mounting boxes 304 respectively. The output shafts of the two second motors 503 are fixed with third gears 501. The two third gears 501 are respectively engaged with the two second gears 5.

[0138] The first motor 403 and the second motor 503 are lightweight and compact micromotors. Since the load on the first motor 403 and the second motor 503 is small during operation, the first gear 404, the first rack 401, the third gear 501, and the second gear 5 driven by the first motor 403 and the second motor 5 can all be made of lightweight materials such as carbon fiber reinforced plastic. After the second motor 503 is started, it can drive the third gear 501 connected thereto to rotate via the output shaft. The rotation of the third gear 501 drives the second gear 5 meshing therewith to rotate. The rotation of the second gear 5 drives the steering bucket 502 to rotate, thereby adjusting the inlet or outlet angle of the airflow.

[0139] When the two turning buckets 502 are arranged facing each other, the airflow can be discharged from one turning bucket 502 and then enter along the other turning bucket 502, so that when the airflow velocity is slowed down, the fluidity of the airflow can be slowed down, which is beneficial for slowing down the airflow velocity when toxic gas is detected to reduce the diffusion of the toxic gas, thereby facilitating the detection of the toxic gas concentration and making it easier for users to judge the underground environment;

[0140] When the two turning buckets 502 are arranged back to back, the air flow can be discharged from one turning bucket 502, then redirected and enter the other turning bucket 502, thereby expanding the flow area of the air flow, enhancing the fluidity of the air flow, and being conducive to dispersing high-concentration toxic gases when there are high-concentration toxic gases in a local area to reduce the concentration of toxic gases and expanding the range of toxic gases to increase the possibility of detecting toxic gases.

[0141] As an alternative embodiment, the sampling assembly includes:

[0142] Two fixing frames 6, symmetrically fixed inside the housing 1. The two fixing frames 6 jointly penetrate through the U-shaped tube 302 to divide the U-shaped tube 302 into two sections. First communication ports are respectively penetrated through the side walls of the two fixing frames 6, and the two first communication ports are respectively communicated with the two sections of the U-shaped tube 302;

[0143] Two transmission bars 601, respectively installed on the opposite sides of the two fixing frames 6 in a transmission manner;

[0144] A number of sampling tubes are arranged in a linear array along the trajectory of the fixing frame 6 between the two transmission bars 601. A number of second communication ports corresponding to and communicating with the sampling tubes are respectively penetrated through the side walls of the two transmission bars 601. When the aligned two second communication ports move to align with the first communication ports, the corresponding sampling tubes are communicated with the U-shaped tube 302;

[0145] A driving mechanism, installed on the fixing frame 6, for driving the transmission bar 601 to transmit;

[0146] The driving mechanism is used to drive the transmission bar 601 to transmit. The transmission bar 601 drives the sampling tube to move. When the sampling tube aligns with the first communication port, the sampling tube is communicated with the U-shaped tube 302, so that the air flow can pass through the sampling tube when flowing along the U-shaped tube 302. When sampling is required, the driving mechanism drives the transmission bar 601 to transmit to drive the sampling tube to move. The sampling tube drives the gas inside to move synchronously. After the sampling tube moves away from the first communication port, both ends of the sampling tube are blocked by the fixing frame 6. Sealing rubber sheets are arranged on the opposite surfaces of the two fixing frames 6, so that the gas can be retained inside the sampling tube to complete sampling, and the latter sampling tube moves to the position where it aligns with the first communication port, so that the air flow can circulate smoothly.

[0147] As an alternative embodiment, the driving mechanism includes:

[0148] Two second racks 602, respectively fixed on the inner wall of the inner circle of the two transmission bars 601;

[0149] Two groups of fifth gears 605 are symmetrically mounted between the two fixing frames 6 for rotation. The two fifth gears 605 located at the same end form a group. The fifth gears 605 in the same group are coaxially connected and mesh with the two second racks 602 respectively.

[0150] The third motor 603 is fixed to the side wall of the fixing frame 6. The output shaft of the third motor 603 is coaxially fixed with two fourth gears 604. The two fourth gears 604 are respectively engaged with a set of two fifth gears 605.

[0151] After the third motor 603 is started, it drives the fourth gear 604 connected to it to rotate through the output shaft. After the fourth gear 604 rotates, it drives the fifth gear 605 meshed with it to rotate. After the fifth gear 605 rotates, it drives the second rack 602 meshed with it to transmit. The second rack 602 drives the transmission bar 601 to transmit, thereby realizing the driving of the transmission bar 601.

[0152] As an optional embodiment, the sampling tube includes:

[0153] Two third connecting pipes 706 are respectively fixed to opposite sides of the two transmission bars 601 and communicate with the second communication port;

[0154] The two plug-in tubes 705 are sealed and plugged with the two third connecting tubes 706 through the protruding teeth 707 respectively;

[0155] Two second fixing rings 704 are fixed to opposite ends of the two plug-in tubes 705;

[0156] The two first fixing rings 703 are respectively mounted on the opposite ends of the two second fixing rings 704 through the limiting teeth 710 for sealing rotation. The rubber sheets 708 are fixed between the opposite ends of the two first fixing rings 703 and the two second fixing rings 704.

[0157] The first connecting tube 701 and the second connecting tube 702 are fixed to the opposite ends of the two first fixing rings 703 respectively. The first connecting tube 701 and the second connecting tube 702 are connected and matched via a telescopic mechanism;

[0158] After the sampling tube has completed sampling and needs to be removed, when the user rotates the first connecting tube 701 and the second connecting tube 702, the two first fixing rings 703 are driven to rotate. The two first fixing rings 703 rotate relative to the second fixing ring 704. When the second fixing ring 704 and the first fixing ring 703 rotate relative to each other, the rubber sheet 708 is driven to twist, so that the rubber sheet 708 forms a seal after twisting, thereby sealing the gas in the area between the two rubber sheets 708, thus realizing the sampling of the gas. The insertion connecting tube 705 and the third connecting tube 706 are hermetically inserted through the convex teeth 707, so that the sampling tube can be inserted and removed, and the setting of the convex teeth 707 prevents the insertion connecting tube 705 from rotating synchronously with the first fixing ring 703 under the drive of the second fixing ring 704 and affecting the seal;

[0159] A sealing drive device is arranged inside the housing 1. The sealing drive device includes a sealing motor and a sealing gear. The sealing motor drives the sealing gear to rotate. The sealing gear includes a sealing drive gear and a sealing driven gear. There are multiple sealing driven gears, which are respectively fixed on the outer circles of the respective first connecting tubes 701 and second connecting tubes 702. By driving the sealing driven gears to rotate through the sealing motor, the first connecting tube 701 and the second connecting tube 702 are driven to rotate, so that the rubber sheet 708 is driven to twist to form a seal. After sampling, the sampling tube moves, driving the sealing driven gears on the first connecting tube 701 and the second connecting tube 702 to move to a position meshing with the sealing drive gear, so as to seal the gas inside the sampling tube after sampling, thus helping to avoid the leakage of harmful gases inside the sampling tube after sampling.

[0160] As an alternative embodiment, the telescopic mechanism includes:

[0161] A sleeve 709, fixed to the end of the first connecting tube 701 and movably sleeved on the outer circle of the second connecting tube 702;

[0162] Two pressing handles 711, respectively fixed on the outer walls of the first connecting tube 701 and the second connecting tube 702;

[0163] A spring, fixed between the first connecting tube 701 and the second connecting tube 702;

[0164] Two sealing strips, symmetrically fixed at both ends of the inner wall of the sleeve 709;

[0165] When the user presses the two pressing handles 711, the first connecting tube 701 and the second connecting tube 702 are driven to approach each other, so that the overall length of the sampling tube is shortened, so that the sampling tube can be removed from between the two third connecting tubes 706, thus facilitating the removal of the sample after sampling;

[0166] After the sampling tube is installed, the spring pushes the first connecting tube 701 and the second connecting tube 702 away from each other, thereby pushing the plug-in tube 705 and the third connecting tube 706 to be tightly plugged together, which helps to prevent the sampling tube from falling off.

[0167] The working principle of the present invention is as follows: when a worker goes down a mine and needs to conduct real-time safety detection of the underground environment, the user fixes the housing 1 on the body through a detachable mounting buckle, and fixes the lightweight detection end to the safety helmet worn on the head through a detachable fixing component;

[0168] The fixing component can be a negative pressure component, including a fixing bar 2, and a negative pressure suction cup is fixed on the inner side of the fixing bar 2. When fixing, the negative pressure suction cup is attached to the safety helmet by connecting an external negative pressure pump, and then the air inside the negative pressure suction cup is extracted by the negative pressure pump, so that the fixing bar 2 is fixed to the safety helmet by negative pressure, thereby achieving the fixation of the lightweight detection end;

[0169] After completing the fixation of the lightweight detection end, the length of the lightweight detection end is adjusted to adjust the distance between the lightweight detection end and the front of the user, thereby realizing detection of a specified distance in front of the user, and the airflow driving component is used to drive the gas in front of the user to drive the airflow, so that the airflow can form a flow in front of the user, thereby the flow of the airflow makes the airflow in the space in front of the user not stagnant. On the one hand, the flow of the airflow avoids the occurrence of safety hazards caused by high concentrations in local areas. On the other hand, the flow of the airflow makes it possible for any high-concentration harmful gas in a local area to be mixed into a space within a larger range by the flow of the airflow, thereby increasing the probability of the harmful gas being detected, which is conducive to improving the probability of detecting the harmful gas.

[0170] At the same time, when the airflow driving component drives the airflow, the airflow flows through the interior of the airflow driving component. After the airflow enters the interior of the airflow driving component, the airflow driving component detects the airflow, thereby identifying harmful gases in the airflow, thereby achieving preliminary detection of harmful gases;

[0171] When the airflow drive assembly detects harmful gas, the sampling assembly intercepts and samples the airflow flowing into the airflow drive assembly, thereby sampling and retaining the detected harmful gas, which is conducive to subsequent further detection and analysis of the harmful gas, thereby facilitating subsequent accurate analysis of the gas and implementing corresponding measures to improve the safety of underground detection;

[0172] The setting of the rear air flow front - placement component can drive the gas inside the space behind the user, that is, the gas that has been detected by the air flow driving component, towards the front of the user. As a result, the detected air flow can disperse the air flow in front of the user, which helps to avoid the situation where the user is interfered by the toxic gas in front during movement, thus causing potential safety hazards.

[0173] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A method for detecting the underground gas environment, characterized in that It includes the following steps: Step 1, installation of the detection device: Fix the detection device on the user's body, and fix the lightweight detection end of the detection device on the safety helmet worn by the user; Step 2, adjustment of the detection device: Telescopically adjust the lightweight detection end of the detection device according to the distance to be detected, so as to adjust to the required detection distance position for detection; Step 3, air flow drive: The lightweight detection end of the detection device is located in front of the user. The detection device drives the air flow in front of the user to drive the harmful gases in the local space with poor air fluidity to mix into the large environment to improve detectability; Step 4, preliminary detection of air flow: When the detection device drives the air flow, during the driving process, the air flow entering the detection device is preliminarily detected to monitor the amount of harmful gases in the environment in front of the user; Step 5, air flow sampling: When it is detected that the amount of harmful gases in the gas in front of the user reaches the set threshold, the detection device intercepts the gas entering the interior to sample the harmful gases.

2. An underground gas environment detection device, applicable to the underground gas environment detection method described in claim 1, characterized in that, It includes: A housing (1), which is detachably and fixedly installed on the user's body through a mounting buckle; A controller (101), which is fixed on the housing (1); A lightweight detection end, which is detachably and fixedly installed on the safety helmet on the user's head through a fixing component. The lightweight detection end includes a rear air flow front-end component and an air flow drive component. The rear air flow front-end component is used to drive the detected gas behind the user to flow forward to the user. The air flow drive component is used to drive the gas in front of the user to flow after adjusting to a suitable distance, and detect harmful gases in the air flow during the process of driving the air flow; A sampling component, which is installed inside the housing (1) and communicated with the air flow drive component. When the air flow drive component does not detect harmful gases in the gas, the sampling component communicates with the air flow drive component to make the air flow flow smoothly. When the air flow drive component detects harmful gases in the gas, the sampling component intercepts and samples the flowing air flow, and switches to the next sampling position to communicate for the air flow to circulate after sampling.

3. An underground gas environment detection device according to claim 2, characterized in that, The rear air flow front-end component includes: Two circulation pipes (201), which are installed through the fixing component. One ends of the two circulation pipes (201) face the user's front and are arranged oppositely; Two first hoses (202), one ends of the two first hoses (202) are respectively fixedly communicated with the other ends of the two circulation pipes (201); Two first air pumps (204), which are symmetrically fixed inside the housing (1). The other ends of the two first hoses (202) are respectively communicated with the output ends of the two first air pumps (204); Two air inlets (203), one ends of the two air inlets (203) are respectively communicated with the input ends of the two first air pumps (204). The other ends of the two air inlets (203) respectively penetrate through the side wall of the housing (1) and are communicated with the outside.

4. An underground gas environment detection device according to claim 2, characterized in that, The air flow drive component includes: Two detection pipes (3), which are installed through the fixing component; Two second hoses (301), which are respectively fixed to one ends of the two detection pipes (3); A U-shaped tube (302), fixed inside the housing (1), one end of the U-shaped tube (302) communicating with one of the second hoses (301); A second air pump (303), fixed inside the housing (1), the other end of the U-shaped tube (302) and the other second hose (301) being fixedly connected to the output end and the input end of the second air pump (303) respectively; Two first mounting boxes (304), respectively mounted at the other ends of the two detection tubes (3); Two detectors (305), respectively fixed inside the two first mounting boxes (304), and respectively communicating between the other ends of the two detection tubes (3) and the ports (306) provided on the first mounting boxes (304).

5. The downhole gas environment detection device according to claim 4, characterized in that, The air flow driving assembly further includes: Two telescopic tubes (4), respectively slidably inserted inside the two detection tubes (3), and the two telescopic tubes (4) are respectively fixedly connected to the two first mounting boxes (304); Two second mounting boxes (402), respectively fixedly sleeved on the outer circles of the two detection tubes (3); Two first racks (401), respectively fixed to the ends of the two telescopic tubes (4) through the ends, and slidably connected to the outer walls of the detection tubes (3); Two first motors (403), respectively fixed inside the two second mounting boxes (402), first gears (404) are fixed to the output shafts of the two first motors (403), and the two first gears (404) are respectively engaged with the two first racks (401).

6. The downhole gas environment detection device according to claim 5, characterized in that, The air flow driving assembly further includes: Two turning hoppers (502), respectively rotatably mounted at the ends of the two ports (306); Two second gears (5), respectively fixed to the outer circles of the two turning hoppers (502); Two second motors (503), respectively fixed inside the two first mounting boxes (304), third gears (501) are fixed to the output shafts of the two second motors (503), and the two third gears (501) are respectively engaged with the two second gears (5).

7. An underground gas environment detection device according to claim 4, characterized in that, The sampling assembly includes: Two fixing frames (6), symmetrically fixed inside the housing (1), the two fixing frames (6) jointly passing through the U-shaped tube (302) to divide the U-shaped tube (302) into two sections, first communication ports are respectively formed through the side walls of the two fixing frames (6), and the two first communication ports are respectively communicated with the two sections of the U-shaped tube (302); Two transmission bars (601), respectively transmission-mounted on the opposite sides of the two fixing frames (6); A number of sampling tubes, linearly arranged along the trajectory of the fixing frame (6) and installed between the two transmission bars (601), a number of second communication ports corresponding to the sampling tubes are respectively formed through the side walls of the two transmission bars (601), and when the aligned two second communication ports are moved to align with the first communication port, the corresponding sampling tube communicates with the U-shaped tube (302); The driving mechanism is installed on the fixed frame (6) and is used to drive the transmission bar (601) to transmit.

8. An underground gas environment detection device according to claim 7, characterized in that, The driving mechanism includes: Two second racks (602) are respectively fixed on the inner circumferential walls of the two transmission bars (601); Two groups of fifth gears (605) are symmetrically rotatably installed between the two fixed frames (6). The two fifth gears (605) at the same end are in a group. The fifth gears (605) in the same group are coaxially connected, and the two fifth gears (605) in the same group are respectively meshed with the two second racks (602); A third motor (603) is fixed on the side wall of the fixed frame (6). Two fourth gears (604) are coaxially fixed on the output shaft of the third motor (603), and the two fourth gears (604) are respectively meshed with the two fifth gears (605) in a group.

9. An underground gas environment detection device according to claim 7, characterized in that, The sampling tube includes: Two third connecting pipes (706) are respectively fixed on the opposite sides of the two transmission bars (601) and are communicated with the second communication port; Two insertion pipes (705) are respectively hermetically inserted into the two third connecting pipes (706) through the convex teeth (707); Two second fixing rings (704) are respectively fixed on the opposite ends of the two insertion pipes (705); Two first fixing rings (703) are respectively hermetically and rotatably installed on the opposite ends of the two second fixing rings (704) through the limiting teeth (710). Rubber sheets (708) are fixed between the opposite ends of the two first fixing rings (703) and the two second fixing rings (704); A first connecting pipe (701) and a second connecting pipe (702) are respectively fixed on the opposite ends of the two first fixing rings (703), and the first connecting pipe (701) and the second connecting pipe (702) are communicated and matched through a telescopic mechanism.

10. The downhole gas environment detection device according to claim 9, characterized in that, The telescopic mechanism includes: A sleeve (709) is fixed at the end of the first connecting pipe (701) and is movably sleeved on the outer circumference of the second connecting pipe (702); Two pressing handles (711) are respectively fixed on the outer walls of the first connecting pipe (701) and the second connecting pipe (702); A spring is fixed between the first connecting pipe (701) and the second connecting pipe (702); Two sealing strips are symmetrically fixed at both ends of the inner wall of the sleeve (709).

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