A full-section harmful gas laser detection device for tunnels

Abstract

The present invention discloses a laser detection device for harmful gases in the full cross-section of a tunnel, which relates to the field of tunnel gas detection. It includes a detector for detecting harmful gases in the full cross-section of the tunnel by laser and a cruising unmanned aerial vehicle carrying the detector. It also includes a power-receiving sliding member slidably connected to a cable. The power-receiving sliding member is connected to the cruising unmanned aerial vehicle through a connection assembly at the bottom, and the cable supplies power to the cruising unmanned aerial vehicle and the detector through the power-receiving sliding member and the connection assembly. The unmanned aerial vehicle carries the detector and conducts cruising detection along a fixed route at the top of the tunnel, enabling full cross-section detection of the tunnel. The cruising unmanned aerial vehicle is connected to the cable, and the power supply through the cable solves the endurance problem. The power-receiving sliding member and the connection assembly limit the range of movement of the cruising unmanned aerial vehicle outside the normal navigation direction, prevent it from colliding with other objects, and increase the flight stability.

Description

Technical Field

[0001] The present invention relates to the field of tunnel gas detection, and particularly to a laser detection device for harmful gases in the full cross-section of a tunnel. Background Art

[0002] In some relatively long tunnels, due to the relatively enclosed space and inconvenient air circulation with the outside, and the environment is generally relatively humid, harmful gases are likely to accumulate. There are many instruments for detecting harmful gases, and laser detection instruments are small, light, and sensitive. However, these laser detection instruments are generally fixed or handheld detection devices, so it is difficult to detect the full cross-section of the tunnel. Therefore, using a mobile detection device to conduct laser detection of harmful gases in the full cross-section of the tunnel in a cruising manner is undoubtedly more comprehensive and cost-saving. Compared with ground transportation equipment that occupies the space at the bottom of the tunnel and affects vehicle travel, drones only occupy the extra space at the top of the tunnel, so they have more advantages. However, the flight of drones is easily affected by the airflow disturbance caused by passing vehicles, making the flight of drones unstable, and even may collide with the inner wall of the tunnel and passing vehicles. In addition, as a carrier tool for conducting laser detection of harmful gases in the full cross-section of the tunnel in a cruising manner, the battery life of drones is also a problem. Ordinary drones that need to be charged regularly are difficult to conduct long-term uninterrupted cruising.

[0003] In the patent with the application number 202311679087.5 and the patent name of an automatic tunnel detection device, a mobile device is used to carry a detection device to detect problems such as harmful gases in the tunnel. This patent relates to the field of tunnel detection technology, including a mobile base, a tunnel surface detection mechanism, a gas detection mechanism, and a sealing mechanism. The tunnel surface detection mechanism, the gas detection mechanism, and the sealing mechanism are all arranged on the mobile base. In the present invention, by setting the tunnel surface detection mechanism, the position of the camera can be adjusted respectively, so that the camera can be adjusted to the required position to better detect the surface of the tunnel, and the surface of the camera can be cleaned by the cleaning component. In the present invention, by setting the gas detection mechanism, the height of the detector can be automatically adjusted to detect harmful gases with a specific gravity greater than and less than that of air respectively.

[0004] However, the mobile base used in this patent is a carrier tool that moves on the ground. It is okay to place it in a non-road tunnel such as an oil pipeline tunnel (the application scenario of this patent) where there is no vehicle traffic, but it is not very suitable in a road tunnel because it may affect traffic safety. Moreover, the mobile base used in this patent also uses its own energy function, and it still needs to be recharged after the energy is consumed, so it is difficult to conduct long-term uninterrupted cruising. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a laser detection device for harmful gases in the full cross-section of a tunnel, so as to solve the technical problems that when using the method of drone cruise detection to perform laser detection of harmful gases in the full cross-section of a tunnel in the prior art, the flight stability of the drone is affected by air flow disturbance and the endurance of the drone is relatively short, making it difficult to support long-term uninterrupted cruising.

[0006] Based on the above purpose, the present invention provides a laser detection device for harmful gases in the full cross-section of a tunnel, including a cable with an exposed outer surface routed on the top of the tunnel. The detection device further includes:

[0007] A detector for detecting harmful gases in the full cross-section of the tunnel by laser and a cruise drone carrying the detector. A communication module connected to a remote control terminal is provided in the cruise drone;

[0008] A power receiving sliding member slidably connected to the cable. The power receiving sliding member is connected to the cruise drone through a connection assembly at the bottom, and the cable supplies power to the cruise drone and the detector through the power receiving sliding member and the connection assembly;

[0009] The connection assembly includes a bottom connecting member movably connected to the center of the upper end of the cruise drone and a top connecting member fixedly connected to the center of the lower end of the power receiving sliding member. A conductive connecting rod and a conductive connecting cylinder are movably connected between the bottom connecting member and the top connecting member, and the upper end of the conductive connecting rod is slidably connected inside the conductive connecting cylinder.

[0010] Further, the power receiving sliding member includes an outer sleeve and a power receiving core rotatably connected inside the outer sleeve. A limiting groove is provided on the inner side wall of the outer sleeve. A limiting slider is fixedly connected to the bottom of the power receiving core, and the limiting slider is slidably connected in the limiting groove. A through groove penetrating through the front and back is provided inside the power receiving core, and the cable passes through the through groove.

[0011] Further, a plurality of graphite gaskets arranged at equal angles are provided in the through groove. A gasket groove is provided inside the power receiving core. The graphite gaskets are detachably slidably connected in the gasket groove. A spring four is provided in the gasket groove, and both ends of the spring four are connected to the bottom of the graphite gasket and the bottom of the gasket groove. A groove matching with the cable is provided on the outer end surface of the graphite gasket, and the front and back ends of the graphite gasket are arc-shaped.

[0012] Further, the cable is fixedly hung below a cable hanging member through a connecting copper hoop. The cable hanging member is fixedly connected to the top of the tunnel. An opening groove for the cable hanging member to pass through and communicating with the through groove is further provided at the top of the power receiving core.

[0013] Further, a power conducting sliding rod is fixedly connected to the bottom of the graphite gasket. A power conducting sliding cylinder communicating with the connection assembly is provided at the bottom of the gasket groove, and the inner end of the power conducting sliding rod is slidably connected inside the power conducting sliding cylinder.

[0014] Further, a fixing ring is fixedly connected to the outer wall of the conductive connecting rod, and a movable ring is slidably connected to the outer wall of the conductive connecting cylinder. A second spring sleeved outside the conductive connecting rod and the conductive connecting cylinder is connected between the fixing ring and the movable ring. An electromagnetic lock is further provided inside the conductive connecting cylinder, and the outer end of the locking rod of the electromagnetic lock passes through the side wall of the conductive connecting cylinder and is located below the movable ring.

[0015] Further, a part of the barrel wall at the lower end of the conductive connecting cylinder is provided as an insulating part, the length of the insulating part is 1 - 5 cm, and a stop block is fixedly connected to the outside of the insulating part.

[0016] Further, the electromagnetic lock includes a housing and a coil installed inside the housing. The coil is connected to the power supply loop of the cruise drone. The locking rod passes through the coil and is slidably connected thereto. A metal disk affected by electromagnetism is fixedly connected to the inner end of the locking rod, and an insulating disk is also fixedly connected to the locking rod on the other side of the coil relative to the metal disk. A fifth spring is also connected between the insulating disk and the coil.

[0017] Further, a connecting rod movable groove is formed in the bottom connecting member, the lower end of the conductive connecting rod is rotatably connected in the connecting rod movable groove, a buffer ejector rod is further provided in the connecting rod movable groove, the buffer ejector rod is slidably connected in an ejector rod groove provided in the bottom connecting member, a third spring is provided in the ejector rod groove, the structure of the top connecting member is the same as that of the bottom connecting member, and the connection relationship between the conductive connecting rod and the bottom connecting member is the same as the connection relationship between the conductive connecting cylinder and the top connecting member.

[0018] Further, fins are fixedly connected to both sides of the bottom connecting member, and a first spring is connected between the lower ends of the fins and the surface of the cruise drone.

[0019] The advantages of the present invention are as follows: 1. The drone is used to carry a detector and perform cruise detection on the top of the tunnel along a fixed route. Without occupying the driving space of the tunnel, it can perform full-section detection of the tunnel, with comprehensive, efficient and low-cost detection.

[0020] 2. The drone is connected to the cable located on the top of the tunnel through a connecting component and a power-receiving sliding member, and sails along the cable wiring direction. The power supply problem of the drone is solved by cable power supply, and the battery of the drone can be cancelled, increasing the load of the drone.

[0021] 3. The cable connected to the drone does not need to be specially set, and only some adaptive improvements need to be made during the original tunnel cable wiring, further reducing costs and not affecting the original tunnel wiring design.

[0022] 4. The connection between the drone and the cable through the specially designed power-receiving sliding part and the connection component restricts the movement range of the drone outside the normal navigation direction, preventing it from colliding with other objects. At the same time, multiple buffer components are arranged in the connection component, increasing the flight stability.

[0023] 5. An active graphite gasket is arranged in the power-receiving sliding part to contact the cable, which is conductive and wear-resistant and can automatically contract when passing through the cable hanging part or other obstacles, ensuring smooth passage. At the same time, the spring four arranged at the bottom of the graphite gasket can not only ensure the automatic reset of the graphite gasket after passing through the obstacle, but also prevent the graphite gasket from generating a gap with the cable due to long-term wear, affecting current conduction.

[0024] 6. A self-powered-off mechanism is arranged in the connection component. When the power-receiving sliding part slides and is blocked, it can automatically cut off the power supply of the drone and notify the control end, making the entire device stop working and wait for maintenance in place, reducing the ineffective loss and stopping the hard pulling and grinding of the graphite gasket, reducing the wear of the graphite gasket. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the overall structural principle of the device of the present invention.

[0027] Figure 2 It is a front view of the device of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the power-receiving sliding part in the device of the present invention.

[0029] Figure 4 It is a schematic diagram of the internal structure of the power-receiving sliding part in the device of the present invention.

[0030] Figure 5 It is Figure 4 an enlarged view of part A in

[0031] Figure 6 It is a schematic diagram of the connection structure of the conductive connecting rod and the conductive connecting cylinder in the device of the present invention.

[0032] Figure 7 It is a schematic diagram of the internal structure of the electromagnetic lock in the device of the present invention.

[0033] Figure 8 It is a schematic diagram of the internal structure of the bottom connecting part in the device of the present invention.

[0034] In the figure, the markings are: 11, cable; 12, cable hanging piece; 13, connecting copper hoop; 15, cruising drone; 16, detector; 17, bottom connecting piece, 171, connecting rod movable groove, 172, buffer ejector rod, 173, ejector rod groove, 174, spring five; 18, spring four; 19, conductive connecting rod; 20, conductive connecting cylinder, 201, insulating part, 202, stop block; 21, power receiving sliding part, 211, outer sleeve part, 212, power receiving core, 213, through groove, 214, opening groove, 215, graphite gasket, 216, limiting groove, 217, limiting slider, 218, gasket groove, 219, spring one; 220, energized sliding rod; 221, energized sliding cylinder; 22, top connecting piece; 23, spring two; 24, movable ring; 25, fixed ring; 26, electromagnetic lock, 261, outer housing, 262, coil, 263, metal disc, 264, locking rod, 265, spring three, 266, insulating disc.

[0035] Specific implementation manners and principles

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0037] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0038] In the first aspect of the present invention, as Figure 1 and Figure 2 shown, the present invention uses a cruising drone 15 carrying a detector 16 to detect harmful gases in the full section of a tunnel by laser. The cruising drone 15 is equipped with an adapted processing chip and a communication module for processing the detection signals of the detector 16 and communicating with a remote control terminal to achieve real-time detection.

[0039] The cruise drone 15 is connected to the cable 11 through the power-receiving sliding member 21 and the connection assembly. The cable 11 does not need to be specially arranged. Only some adaptive improvements are required during the original tunnel cable wiring. It is necessary to ensure that the surface of the cable 11 is exposed. At the same time, the cable hanging member 12 for installing the cable 11 is also arranged to ensure that it can pass through the power-receiving sliding member 21 smoothly. The cable hanging member 12 is insulated, but the connection copper hoop 13 in direct contact with the cable 11 is conductive. Therefore, the cable 11 supplies power to the cruise drone 15 and the detector 16 through the power-receiving sliding member 21 and the connection assembly to solve the problem of the drone's battery life. And such a design can cancel the original battery in the cruise drone 15, increase the drone's load, and enable it to carry more other module devices related to harmful gas detection.

[0040] Preferably, as Figure 6 shown, the connection assembly includes a bottom connecting member 17 movably connected to the center of the upper end of the cruise drone 15 and a top connecting member 22 fixedly connected to the center of the lower end of the power-receiving sliding member 21. A conductive connecting rod 19 and a conductive connecting cylinder 20 are movably connected between the bottom connecting member 17 and the top connecting member 22. The upper end of the conductive connecting rod 19 is slidably connected inside the conductive connecting cylinder 20. In addition, a fixed ring 25 is fixedly connected to the outer wall of the conductive connecting rod 19, a movable ring 24 is slidably connected to the outer wall of the conductive connecting cylinder 20, and a second spring 23 sleeved on the conductive connecting rod 19 and the conductive connecting cylinder 20 is connected between the fixed ring 25 and the movable ring 24. An electromagnetic latch 26 is also provided inside the conductive connecting cylinder 20. The outer end of the locking rod 264 of the electromagnetic latch 26 passes through the side wall of the conductive connecting cylinder 20 and is located below the movable ring 24.

[0041] Among them, as Figure 7 shown, the electromagnetic latch 26 includes a housing 261 and a coil 262 installed inside the housing 261. The coil 262 is connected to the power supply loop of the cruise drone 15. The locking rod 264 passes through the coil 262 and is slidably connected thereto. A metal disk 263 affected by electromagnetic force is fixedly connected to the inner end of the locking rod 264. And an insulating disk 266 is also fixedly connected to the locking rod 264 on the other side of the coil 262 relative to the metal disk 263. A third spring 265 is also connected between the insulating disk 266 and the coil 262. When the coil 262 is energized, an electromagnetic force is generated to attract the metal disk 263, so that the locking rod 264 passes through the side wall of the conductive connecting cylinder 20 and locks the movable ring 24.

[0042] The key point is that a self-powered-off mechanism is also provided between the conductive connecting rod 19 and the conductive connecting cylinder 20. As Figure 6 shown, the barrel wall part at the lower end of the conductive connecting cylinder 20 is set as an insulating part 201, the length of the insulating part 201 is 1 - 5 cm, and a stop block 202 is also fixedly connected to the outside of the insulating part 201.

[0043] During the normal driving of the cruise drone 15, as the cruise drone 15 swings (or shakes under the influence of airflow), the conductive connecting rod 19 slides and retracts in the conductive connecting tube 20, and the spring 23 plays a buffering role. If the sliding of the power-receiving sliding member 21 is blocked, the flight of the cruise drone 15 will be subject to greater resistance. At this time, the tension between the cruise drone 15 and the power-receiving sliding member 21 will increase, so the conductive connecting rod 19 will be affected by the tension and extend more from the conductive connecting tube 20. When the conductive connecting rod 19 extends enough so that the upper end of the conductive connecting rod 19 contacts the insulating part 201 at the lower end of the conductive connecting tube 20, the power circuit between the cable 11 and the cruise drone 15 will be disconnected, and the cruise drone 15 will send a signal to the remote control terminal through the emergency power supply, and then the entire device will stop working and wait for maintenance in place, reducing invalid losses and stopping the raw pulling and hard grinding of the graphite gasket, reducing the wear of the graphite gasket.

[0044] After the power circuit between the cable 11 and the cruise drone 15 is disconnected, the coil 262 connected to the circuit is de-energized, the electromagnetic force disappears, and the spring 5 174 drives the insulating disk 266 to move and drives the locking rod 264 to move, so that the locking rod 264 retracts and releases the movable ring 24. After the movable ring 24 is released, it slides downward under the pulling force of the spring 23 until it is blocked by the block 202. At this time, the conductive link 19 is in contact with the insulating part 201, so as to avoid the spring 23 pulling the conductive link 19 back to contact with the conductive part of the conductive tube 20 again after the power of the cruise drone 15 disappears.

[0045] It is best to set the conductive connecting rod 19 and the conductive connecting tube 20 to a structure that cannot be separated.

[0046] On the other hand, Figure 3 , Figure 4 and Figure 5 As shown, in order to make the power receiving sliding member 21 slide more smoothly on the cable 11, the power receiving sliding member 21 is provided with two parts, namely, an outer sleeve 211 and a power receiving core 212 rollingly connected in the outer sleeve 211.

[0047] Among them, a limiting groove 216 is provided on the inner side wall of the outer set 211, and a limiting slider 217 is fixedly connected to the bottom of the power receiving core 212, and the limiting slider 217 is slidably connected in the limiting groove 216. Therefore, the outer set 211 can rotate within a certain range outside the power receiving core 212, which also enables the cruise drone 15 to swing within a certain range in the left and right directions.

[0048] The inner side of the receiving core 212 is provided with a through groove 213 that passes through the front and back, and the cable 11 passes through the through groove 213. A number of graphite gaskets 215 arranged at equal angles are provided in the through groove 213. A gasket groove 218 is provided inside the receiving core 212. The graphite gasket 215 is detachably slidably connected in the gasket groove 218. A spring 219 is provided in the gasket groove 218. The two ends of the spring 219 are connected to the bottom of the graphite gasket 215 and the bottom of the gasket groove 218. The outer end surface of the graphite gasket 215 is provided with a groove that matches the cable 11, and the front and rear ends of the graphite gasket 215 are set as arc surfaces. The cable 11 is fixedly hung under the cable hanging part 12 through the connecting copper hoop 13. The cable hanging part 12 is fixedly connected to the top of the tunnel. The top of the receiving core 212 is also provided with an open groove 214 that is connected to the through groove 213 and is used for the cable hanging part 12 to pass through.

[0049] Therefore, the sliding of the power receiving sliding member 21 on the cable 11 mainly relies on the graphite gasket 215, and when passing through the connecting copper hoop 13 (or other obstacles), the graphite gasket 215 can be automatically retracted into the gasket groove 218 under pressure to ensure smooth passage. At the same time, the spring 1 219 set at the bottom of the graphite gasket 215 can ensure that the graphite gasket 215 automatically resets after passing through the obstacle. And if the graphite gasket 215 becomes thinner due to long-term wear, the spring 1 219 can also ensure that the graphite gasket 215 is further extended and is always in close contact with the cable 11, preventing a gap from being generated between the cable 11 and affecting the current conduction.

[0050] Preferably, Figure 5 As shown, when the graphite gasket 215 becomes thinner to a predetermined thickness due to long-term wear, the remote control terminal can be notified in time to remind the staff to replace the graphite gasket 215. A power-on slide bar 220 is fixedly connected to the bottom of the graphite gasket 215, and a power-on slide cylinder 221 is provided at the bottom of the gasket groove 218 to conduct with the connecting component, and the inner end of the power-on slide bar 220 is slidably connected in the power-on slide cylinder 221. The graphite gasket 215 supplies power to the connecting component through the power-on slide bar 220 and the power-on slide cylinder 221.

[0051] Therefore, the graphite gasket 215 becomes thinner and extends out of the gasket groove 218 under the action of the spring 1 219. Until the power-on slide bar 220 at the bottom of the graphite gasket 215 slides out of the power-on slide cylinder 221, so that the two are separated. At this time, the power-on slide bar 220 and the power-on slide cylinder 221 are no longer electrically conductive, so the power circuit between the cable 11 and the cruise drone 15 is disconnected, and the cruise drone 15 sends a signal to the remote control terminal through the emergency power supply, and then the entire device stops working and waits for maintenance.

[0052] On the other hand, in order to ensure that the cruising drone 15 can swing and shake within a normal range while preventing it from bumping into other objects, a connecting component is provided, and the connecting component includes a plurality of buffer components, which improves the flight stability.

[0053] Specifically, as Figure 8 shown, a connecting rod activity groove 171 is formed in the bottom connecting member 17. The lower end of the conductive connecting rod 19 is rotatably connected in the connecting rod activity groove 171. A buffer ejector rod 172 is also provided in the connecting rod activity groove 171. The buffer ejector rod 172 is slidably connected in an ejector rod groove 173 provided in the bottom connecting member 17. A spring five 174 is provided in the ejector rod groove 173. The structure of the top connecting member 22 is the same as that of the bottom connecting member 17, and the connection relationship between the conductive connecting rod 19 and the bottom connecting member 17 is the same as the connection relationship between the conductive connecting cylinder 20 and the top connecting member 22. Fins are fixedly connected to both sides of the bottom connecting member 17, and a spring four 18 is connected between the lower end of the fin and the surface of the cruising drone 15.

[0054] Therefore, since the conductive connecting rod 19 can rotate back and forth in the connecting rod activity groove 171 (the conductive connecting cylinder 20 and the top connecting member 22 can also rotate back and forth), the cruising drone 15 can swing within a certain range in the front-rear direction; and the outer sleeve 211 can rotate within a certain range on the outside of the battery cell 212, which also enables the cruising drone 15 to swing within a certain range in the left-right direction. In addition, the upper end of the conductive connecting rod 19 is slidably connected in the conductive connecting cylinder 20, and the conductive connecting rod 19 can telescopically slide in the conductive connecting cylinder 20. Therefore, the cruising drone 15 can swing within a certain range in the up-down direction.

[0055] And the corresponding springs also play a buffering role. The setting of these buffer components, combined with the ability of the cruising drone 15 to swing within a reasonable range in the three axial planes, greatly improves its flight stability. Detailed implementation mode

[0056] When wiring the tunnel cable, some adaptive improvements are made to the cable 11. It is necessary to ensure that the surface of the cable 11 is exposed, and at the same time, the cable hanging member 12 for installing the cable 11 is also provided to ensure that it can pass through the power receiving sliding member 21 smoothly. Among them, the cable hanging member 12 is insulated, but the connecting copper hoop 13 in direct contact with the cable 11 is conductive. Then, the device is installed by sleeving the power receiving sliding member 21 on the cable 11. After installation and debugging are completed, the tunnel full-section harmful gas laser detection can be carried out in a cruising manner.

[0057] The cruise drone 15 cruises along the cable 11. The cable 11 supplies power to the cruise drone 15 and the detector 16. The detector 16 performs real-time full-section harmful gas laser detection and sends the detection signal to the remote control terminal through the communication module.

[0058] During the flight, when passing through the cable hanger 12 (or other obstacles) on the cable 11, the graphite gasket 215 can be automatically compressed and retracted into the gasket groove 218 to ensure smooth passage. After leaving the obstacle, the spring 219 acts on the graphite gasket 215 to make it automatically reset, ensuring that the graphite gasket 215 is always in close contact with the cable 11. After reaching both ends of the tunnel, the cruise drone 15 can automatically return. Rest stops can also be set on the flight route of the cruise drone 15. After the cruise drone 15 cruises for a period of time, it enters the rest stop to rest for a while.

[0059] During the flight of the cruise drone 15, when affected by the airflow disturbance caused by passing vehicles, since the conductive connecting rod 19 can rotate back and forth in the connecting rod moving groove 171, the cruise drone 15 can swing within a certain range in the front-rear direction; the outer sleeve 211 can rotate within a certain range on the outside of the battery cell 212, which also enables the cruise drone 15 to swing within a certain range in the left-right direction. In addition, the upper end of the conductive connecting rod 19 is slidably connected in the conductive connecting cylinder 20, and the conductive connecting rod 19 can telescopically slide in the conductive connecting cylinder 20. Therefore, the cruise drone 15 can swing within a certain range in the up-down direction.

[0060] The cruise drone 15 swings within a reasonable range in the three axial planes and cooperates with the spring 4 18, spring 2 23, and spring 5 174 to play a buffering role, greatly improving its flight stability.

[0061] If the sliding of the current-receiving sliding part 21 on the cable 11 is blocked during the flight of the cruise drone 15, the flight of the cruise drone 15 will be subject to greater resistance. At this time, the pulling force between the cruise drone 15 and the current-receiving sliding part 21 will increase. Therefore, the conductive connecting rod 19 will be more extended from the conductive connecting cylinder 20 under the influence of the pulling force. When the conductive connecting rod 19 extends enough so that the insulating part 201 at the upper end of the conductive connecting rod 19 contacts the lower end of the conductive connecting cylinder 20, the power-on circuit between the cable 11 and the cruise drone 15 will be disconnected. The cruise drone 15 then supplies power through the emergency power supply to send a signal to the remote control terminal, and then the entire device stops working and waits for repair in place.

[0062] After cruising for a period of time, if the graphite gasket 215 wears too much, the cruise drone 15 will also automatically send a signal to the remote control terminal, and then the entire device stops working and waits for the staff to come and repair and replace the graphite gasket 215.

[0063] Based on the above, the present invention uses a drone carrying a detector 16 to conduct cruise detection along a fixed route at the top of the tunnel. Without occupying the driving space of the tunnel, it can conduct full-section detection of the tunnel, with comprehensive, efficient and low-cost detection. The cruise drone 15 is connected to the cable 11, and the power supply problem is solved through the cable 11. The specially designed power receiving sliding member 21 and the connection assembly limit the movement range of the cruise drone 15 outside the normal navigation direction, preventing it from colliding with other objects. The setting of multiple buffer components increases the flight stability. The movable graphite gasket 215 contacts the cable 11, which is conductive and wear-resistant and can automatically contract when passing through the cable hanging member 12 or other obstacles to ensure smooth passage. At the same time, the spring 219 at the bottom of the graphite gasket 215 can not only ensure that the graphite gasket 215 automatically resets after passing through the obstacle, but also prevent the graphite gasket 215 from generating a gap with the cable 11 due to long-term wear, affecting current conduction. And a self-powered-off mechanism is set in the connection assembly. When the power receiving sliding member 21 slides and is blocked, it can automatically cut off the power and notify the control end, so that the entire device stops working and waits for maintenance in place, reducing the ineffective loss and the wear of the graphite gasket 215.

[0064] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary, and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0065] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A laser detection device for harmful gases in a tunnel with a full cross section, comprising a cable (11) with its outer surface exposed and wired on the top of the tunnel and a cable hanging member (12) fixedly connected to the top of the tunnel, wherein the cable (11) is fixedly connected to the cable hanging member (12), and is characterized in that: The detection device also includes: A detector (16) for detecting harmful gases in the entire cross-section of a tunnel by means of laser, and a cruise drone (15) equipped with the detector (16), wherein the cruise drone (15) is provided with a communication module connected to a remote control terminal; A power receiving sliding member (21) slidably connected to the cable (11), wherein the power receiving sliding member (21) is connected to the cruise drone (15) via a connecting assembly at the bottom, and the cable (11) supplies power to the cruise drone (15) and the detector (16) via the power receiving sliding member (21) and the connecting assembly; The connection assembly comprises a bottom connection member (17) movably connected to the center of the upper end of the cruising drone (15) and a top connection member (22) fixedly connected to the center of the lower end of the power receiving sliding member (21), a conductive connecting rod (19) and a conductive connecting tube (20) being movably connected between the bottom connection member (17) and the top connection member (22), and the upper end of the conductive connecting rod (19) is slidably connected in the conductive connecting tube (20); A fixed ring (25) is fixedly connected to the outer wall of the conductive connecting rod (19), and a movable ring (24) is slidably connected to the outer wall of the conductive connecting tube (20). A second spring (23) is connected between the fixed ring (25) and the movable ring (24) and is sleeved outside the conductive connecting rod (19) and the conductive connecting tube (20). An electromagnetic lock (26) is also provided in the conductive connecting tube (20), and the outer end of a locking rod (264) of the electromagnetic lock (26) passes through the side wall of the conductive connecting tube (20) and is located below the movable ring (24); The electromagnetic lock (26) comprises an outer shell (261) and a coil (262) installed in the outer shell (261), the coil (262) being connected to the power supply circuit of the cruise drone (15), the locking rod (264) passing through the coil (262) and being slidably connected thereto, the inner end of the locking rod (264) being fixedly connected to a metal disk (263) affected by electromagnetic force, and an insulating disk (266) being fixedly connected to the locking rod (264) on the other side of the coil (262) relative to the metal disk (263), and a spring three (265) being connected between the insulating disk (266) and the coil (262); The wall portion of the lower end of the conductive connecting tube (20) is provided as an insulating portion (201). The length of the insulating portion (201) is 1-5 cm. A stopper (202) is also fixedly connected to the outer side of the insulating portion (201).

2. According to claim 1, a laser detection device for harmful gases in the entire tunnel section is characterized in that: The power receiving sliding member (21) comprises an outer sleeve (211) and a power receiving core (212) rollingly connected inside the outer sleeve (211); a limiting groove (216) is provided on the inner side wall of the outer sleeve (211); a limiting sliding block (217) is fixedly connected to the bottom of the power receiving core (212); the limiting sliding block (217) is slidably connected inside the limiting groove (216); a through groove (213) penetrating front to back is provided inside the power receiving core (212); the cable (11) passes through the through groove (213).

3. A laser detection device for harmful gases in the entire tunnel section according to claim 2, characterized in that: A plurality of graphite gaskets (215) arranged at equal angles are arranged in the through groove (213); a gasket groove (218) is arranged inside the power receiving core (212); the graphite gasket (215) is detachably slidably connected in the gasket groove (218); a spring (219) is arranged in the gasket groove (218); two ends of the spring (219) are connected to the bottom of the graphite gasket (215) and the bottom of the gasket groove (218); an outer end surface of the graphite gasket (215) is provided with a groove matching the cable (11); and the front and rear ends of the graphite gasket (215) are arranged as arc surfaces.

4. A laser detection device for harmful gases in the entire tunnel section according to claim 3, characterized in that: The cable (11) is fixedly hung below the cable hanging member (12) via a connecting copper hoop (13); the cable hanging member (12) is fixedly connected to the top of the tunnel; and an open slot (214) communicating with the through slot (213) and for allowing the cable hanging member (12) to pass through is also provided on the top of the receiving core (212).

5. The laser detection device for harmful gases in the entire tunnel section according to claim 3 is characterized in that: The bottom of the graphite gasket (215) is fixedly connected to a power-carrying slide bar (220), the bottom of the gasket groove (218) is provided with a power-carrying slide cylinder (221) that is in electrical communication with the connection assembly, and the inner end of the power-carrying slide bar (220) is slidably connected in the power-carrying slide cylinder (221).

6. The laser detection device for harmful gases in the entire tunnel section according to claim 1 is characterized in that: The bottom connecting member (17) is provided with a connecting rod movable groove (171), the lower end of the conductive connecting rod (19) is rotatably connected in the connecting rod movable groove (171), a buffering top rod (172) is further provided in the connecting rod movable groove (171), the buffering top rod (172) is slidably connected to a top rod groove (173) provided in the bottom connecting member (17), a spring (174) is provided in the top rod groove (173), the structure of the top connecting member (22) is the same as that of the bottom connecting member (17), and the connection relationship between the conductive connecting rod (19) and the bottom connecting member (17) is also the same as the connection relationship between the conductive connecting tube (20) and the top connecting member (22).

7. A laser detection device for harmful gases in the entire tunnel section according to claim 1 or 6, characterized in that: Fins are fixedly connected to both sides of the bottom connecting member (17), and a spring (18) is connected between the lower end of the fin and the surface of the cruising drone (15).

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