A gas sampling device based on fire-fighting drone

Abstract

The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a gas sampling device based on a fire-fighting unmanned aerial vehicle, comprising an unmanned aerial vehicle body, a first sensor being arranged on the unmanned aerial vehicle body, and a sampling mechanism arranged on the bottom plate of the unmanned aerial vehicle body, the sampling mechanism comprising a sample storage box fixedly arranged on the bottom plate of the unmanned aerial vehicle body, and a suction machine connected to the top plate of the sample storage box, a support pipe being connected to the bottom plate of the sample storage box, the lower end of the support pipe in the vertical direction being arranged higher than the lower end of the unmanned aerial vehicle body, and a sampling head assembly connected to the inner cavity of the sample storage box being arranged in the support pipe; the present invention adds a gas sampling device below the existing fire-fighting unmanned aerial vehicle, so that when the fire-fighting unmanned aerial vehicle moves to the top of a fire, the dense smoke can be sampled without manual sampling, thereby reducing safety risks.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a gas sampling device based on a fire-fighting unmanned aerial vehicle. Background Art

[0002] As a new type of industrial technology, firefighting drones have been widely used in various fields. In China, many firefighting agencies have successfully used drones to conduct fire scene reconnaissance and monitoring, drop rescue supplies, and carry fire extinguishing tanks to extinguish fires, and the results are very obvious. The firefighting field is a high-risk field. The use of firefighting drones equipped with fire extinguishing tanks to extinguish fires instead of human actions can greatly improve fire safety. Firefighting drones are fast and maneuverable, low in cost, and simple to maintain and operate, but their load capacity is limited. There is no gas sampling device on the existing firefighting drones. When it is necessary to detect the composition of the thick smoke at the fire scene, it is still necessary to approach the fire scene or enter the fire scene to sample the thick smoke, which still brings great safety hazards, especially the sampling of toxic substances at the fire scene. In order to solve the above problems, the present invention proposes a gas sampling device based on a firefighting drone. Summary of the invention

[0003] To achieve the above-mentioned objectives, the present invention provides a gas sampling device based on a fire-fighting drone, comprising a drone body, a first sensor disposed on the drone body, and a sampling mechanism disposed on the bottom plate of the drone body, the sampling mechanism comprising a sample storage box fixedly disposed on the bottom plate of the drone body, and a suction machine connected to the top plate of the sample storage box, a support tube is connected to the bottom plate of the sample storage box, the lower end of the support tube in the vertical direction is higher than the lower end of the drone body, a sampling head assembly connected to the inner cavity of the sample storage box is disposed in the support tube, and when working, the lower end of the sampling head assembly moves to the outside of the lower end opening of the support tube to extend into the thick smoke for gas sampling.

[0004] Optionally, the sampling head assembly includes a snap-fit ​​groove and an air guide box movably arranged in the support tube, and a connecting tube arranged between the snap-fit ​​groove and the air guide box and used to connect the snap-fit ​​groove and the air guide box, the upper end of the air guide box is arranged as an arcuate surface, and the upper end of the air guide box extends into the blocking tube and is arranged to be in conflict with the inner wall of the blocking tube, the blocking tube is fixedly arranged on the inner wall of the support tube, an air guide hole is opened on the arcuate surface of the air guide box, a sealing gasket is fixedly arranged on the inner wall of the blocking tube, the sealing gasket and the air guide box are arranged to be in conflict with each other, an elastic tube is fixedly arranged on the inner wall of the blocking tube, the elastic tube cover is arranged outside the air guide box, and the lower end of the elastic tube is fixedly connected to the upper end surface of the sliding ring, the sliding ring fixed sleeve is arranged outside the air guide box, and the sliding ring is slidably arranged with the support tube.

[0005] Optionally, it also includes a sealing mechanism for sealing the lower end opening of the support tube, the sealing mechanism includes a sealing plate that is abutted against the lower end of the support tube, a U-shaped plate is fixedly connected to the side wall of the sealing plate, the free end of the U-shaped plate is fixedly connected to a support slider, the support slider is slidably set in a support slot, and the support slot is opened on the outer side wall of the support tube.

[0006] Optionally, it also includes a driving mechanism, which includes a first driving part for driving the sealing plate to move in a horizontal direction, the first driving part includes a driving cylinder fixedly arranged on the outer wall of the support tube, the driving end of the driving cylinder is connected to a cylinder arm, the free end of the cylinder arm is fixedly connected to a first rod, a second rod is arranged on the side wall of the first rod, and the free end of the second rod is fixedly connected to the side wall of the sealing plate.

[0007] Optionally, the first driving part also includes a first guide assembly arranged between the first rod and the second rod and used to connect the first rod and the second rod, the first guide assembly includes a first guide rod, a first guide cylinder and a first guide spring, the first guide rod is movably inserted in the first guide cylinder, the first guide spring is wound outside the first guide rod, one end of the first guide spring is fixedly connected to the side wall of the first guide rod, and the other end of the first guide spring is fixedly connected to the outer side wall of the first guide cylinder.

[0008] Optionally, the driving mechanism also includes a second driving part, the second driving part includes a push-pull rod, one end of the push-pull rod is hinged on the upper end surface of the cylinder arm, the other end of the push-pull rod passes through a through hole and is hinged on a movable plate, the through hole is provided on the support tube, the movable plate is movably arranged in a movable groove, the movable groove is provided on the inner side wall of the support tube, and the movable groove and the through hole are interconnected, and a fixed block is fixedly connected to the side of the movable plate away from the push-pull rod, and the fixed block is interconnected with the air guide box.

[0009] Optionally, it also includes a component mechanism, which includes M component boxes, and the M component boxes are fixedly arranged in the sample storage box. A sealing cover is threadedly provided on the sample storage box, and the sealing cover is used to seal the sample outlet of the component box. The upper end of the component box is connected to one end of a first air duct, and the other end of the first air duct is connected to the suction port of the suction machine. The lower end of the component box is connected to a second air duct, and the lower end of the second air duct extends into the support tube and is connected to the inner cavity of the support tube. M is a positive integer greater than or equal to 2.

[0010] Optionally, it also includes a pushing mechanism, which includes a partition fixedly arranged on the inner side wall of the support tube, a pushing rod movably inserted in the middle of the partition, the lower end of the pushing rod movably inserted in the blocking tube and fixedly connected to the outer top wall of the air guide box, a first piston is fixedly sleeved outside the upper end of the pushing rod, the first piston is slidably arranged in the supporting tube, a leak-proof plate is fixedly arranged on the inner side wall of the supporting tube, the leak-proof plate is fixedly sleeved outside the second air guide tube, the lower end surface of the leak-proof plate is flush with the lower end of the second air guide tube, and the lower end surface of the leak-proof plate and the lower end of the second air guide tube are both arranged to contact with the upper end surface of the first piston, a plurality of first holes are opened on the rod body of the pushing rod, a second hole is opened inside the pushing rod, the upper end opening of the second hole is arranged at the upper end of the pushing rod, and the second hole and a plurality of the first holes are connected to each other.

[0011] Optionally, it further includes a second sensor disposed inside the second air duct, and the second sensor is used to detect the gas pressure in the second air duct in real time.

[0012] Optionally, it also includes a control mechanism, which includes a soft rod fixedly connected to the upper end of the push rod, a third hole is opened inside the soft rod, the third hole and the second hole are connected to each other, a second piston is fixedly sleeved outside the soft rod, the second piston is slidably arranged with the inner side wall of the support tube, a first electrode contact is fixedly arranged on the lower end surface of the second piston, a second electrode contact is matched below the first electrode contact, the second electrode contact is fixedly arranged on the upper end surface of the first piston, a plurality of second guide assemblies are fixedly arranged on the upper end surface of the first piston, the upper end of the second guide assembly is fixedly connected to the lower end surface of the second piston, the second guide assembly includes a second guide rod, a second guide cylinder and a second guide spring, the second guide rod is movably inserted in the second guide cylinder, the second guide spring is wound outside the second guide rod, and the two ends of the second guide spring are respectively fixedly connected to the side wall of the second guide rod and the outer side wall of the second guide cylinder.

[0013] The beneficial effects of the present invention are as follows:

[0014] The present invention adds a gas sampling device under the existing fire-fighting drone, so that when the fire-fighting drone moves to the top of the fire, the thick smoke can be sampled without manual sampling, thereby reducing safety risks; and the gas sampling device has a reasonable structural design and can achieve length adjustment in the vertical direction. When sampling, the gas sampling device can be extended into the thick smoke for sampling, so that the drone does not need to be placed in the thick smoke, which can protect the fire-fighting drone; and after the sampling is completed, the gas sampling device retracts to the top of the support frame of the fire-fighting drone, without affecting the parking of the fire-fighting drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of a gas sampling device based on a fire-fighting drone of the present invention;

[0016] Figure 2 The gas sampling device based on the fire-fighting drone of the present invention Figure 1 Schematic diagram of the external structure of the sampling mechanism;

[0017] Figure 3 The gas sampling device based on the fire-fighting drone of the present invention Figure 2 A schematic diagram of a partial cross-sectional structure of the middle support tube;

[0018] Figure 4 The gas sampling device based on the fire-fighting drone of the present invention Figure 3 A schematic diagram of the enlarged structure in the middle;

[0019] Figure 5 The gas sampling device based on the fire-fighting drone of the present invention Figure 2 A magnified schematic diagram of the structure B in the middle;

[0020] Figure 6 The gas sampling device based on the fire-fighting drone of the present invention Figure 2 Schematic diagram of the structure inside the medium sample storage box;

[0021] Figure 7 The gas sampling device based on the fire-fighting drone of the present invention Figure 2 A schematic diagram of the structure in which a pushing mechanism is arranged inside the middle support tube;

[0022] Figure 8 The gas sampling device based on the fire-fighting drone of the present invention Figure 7 A schematic diagram of the structure in which a second sensor is arranged in the second air duct;

[0023] Fig. 9 The gas sampling device based on the fire-fighting drone of the present invention is a structural schematic diagram of a control mechanism arranged above a push plate;

[0024] Fig.10This is a structural schematic diagram of a gas sampling device based on a fire-fighting drone according to the present invention, in which a filter screen is arranged in an air guide box.

[0025] Description of Reference Numerals

[0026] UAV body 1, sampling mechanism 2, sample storage box 21, suction machine 22, support tube 23, sampling head assembly 24, buckle groove 241, guide tube 242, air guide box 243, blocking tube 244, sealing pad 245, air guide hole 246, sliding ring 247, elastic tube 248, blocking mechanism 3, blocking plate 31, supporting slide groove 32, supporting slider 33, U-shaped plate 34, driving mechanism 4, driving cylinder 41, cylinder arm 42, first rod 43, first guide assembly 44, first guide rod 441, first guide cylinder 442, first guide spring 443, second rod 45, push-pull rod 46, through hole 47, movable plate 48, movable groove 49, fixed block 410, component mechanism 5, component box 51, first air duct 52, blocking cover 53, second air duct 54, pushing mechanism 6, partition 61, pushing rod 62, first piston 63, leak-proof plate 64, first hole 65, second hole 66, second sensor 7, control mechanism 8, soft rod 81, third hole 82, second piston 83, first electrode contact piece 84, second electrode contact piece 85, second guide assembly 86, second guide rod 861, second guide cylinder 862, second guide spring 863, filter screen 9, guide plate 10. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0028] In view of the problems existing in the prior art, an embodiment of the present invention provides a gas sampling device based on a fire-fighting drone, wherein the gas sampling device based on a fire-fighting drone comprises a drone body 1, and two support frames (not numbered) are arranged on the bottom plate of the drone body 1, and the support frames are used to support the drone body 1 when it is parked on a platform, such as Figure 1As shown; the drone body 1 is provided with a first sensor (not shown), and a sampling mechanism 2 is provided on the bottom plate of the drone body 1, such as Figure 1 shown.

[0029] In one example, Figure 2 and Figure 3 As shown, the sampling mechanism 2 includes a sample storage box 21 fixedly arranged on the bottom plate of the drone body 1, and a suction machine 22 connected to the top plate of the sample storage box 21. In one example, the suction machine 22 is fixed to the top plate of the sample storage box 21 by screws; a support tube 23 is connected to the bottom plate of the sample storage box 21, and in one example, the support tube 23 is fixedly plugged into the bottom plate of the sample storage box 21; the lower end of the support tube 23 in the vertical direction is arranged higher than the lower end of the drone body 1, and this arrangement is to avoid the influence of the support tube 23 on the parking of the drone when the drone is parked on the platform; a sampling head assembly 24 connected to the inner cavity of the sample storage box 21 is arranged in the support tube 23. When working, the lower end of the sampling head assembly 24 moves to the outside of the lower end opening of the support tube 23 to extend into the thick smoke for gas sampling. It can be understood that the lower end of the sampling head assembly 24 directly extends out of the support tube 23.

[0030] In one embodiment, if Figure 3 As shown, the sampling head assembly 24 includes a snap-fit ​​groove 241 and an air guide box 243 movably arranged in the support tube 23, and a conducting pipe 242 arranged between the snap-fit ​​groove 241 and the air guide box 243 and used to connect the snap-fit ​​groove 241 and the air guide box 243. The snap-fit ​​groove 241, the conducting pipe 242 and the air guide box 243 are as a whole and can move downward to the outside of the support tube 23. Specifically, when sampling is required, the combined structure of the snap-fit ​​groove 241, the conducting pipe 242 and the air guide box 243 moves downward. In one example, the snap-fit ​​groove 241 and the conducting pipe 242 all extend out of the support tube 23. This arrangement can make the overall length of the support tube 23, the snap-fit ​​groove 241 and the conducting pipe 242 longer, so that the drone body 1 is farther away from the thick smoke, thereby providing better protection for the drone body 1.

[0031] In one example, Figure 3 As shown, the upper end of the air guide box 243 is set as an arc surface, and the upper end of the air guide box 243 extends into the blocking tube 244 and is set against the inner side wall of the blocking tube 244. The blocking tube 244 is fixedly set on the inner side wall of the support tube 23. The arc surface of the air guide box 243 is provided with an air guide hole 246. Figure 4 As shown, a sealing gasket 245 is fixedly arranged on the inner wall of the blocking tube 244, and the sealing gasket 245 and the air guide box 243 are arranged to conflict with each other. Figure 4 As shown, when sampling is required, the air guide box 243 moves downward to the outside of the blocking tube 244. At this time, the air guide box 243 is not in contact with the blocking tube 244. The suction force generated by the start of the suction machine 22 will absorb the thick smoke and move it upward, and enter the sample storage box 21 through the combined structure of the buckling groove 241, the guide tube 242, the air guide box 243, the air guide hole 246 and the blocking tube 244 in sequence. When sampling is completed, the air guide box 243 moves upward to the blocking tube 244, and the upper end of the air guide box 243 and the inner side wall of the blocking tube 244 conflict with each other. At this time, under the action of the sealing gasket 245, the air guide hole 246 is blocked to prevent the gas entering the sample storage box 21 from flowing back. The structural design of the sampling head assembly 24 in this embodiment is reasonable, and the combined structure of the snap-fit ​​groove 241, the conducting tube 242 and the air guide box 243 can extend out of the support tube 23 to increase the overall length, thereby preventing the drone body 1 from directly contacting the thick smoke and protecting the drone body 1. The mutual interference between the air guide box 243 and the blocking tube 244 can achieve the sealing of the air guide hole 246 to prevent the sample from flowing back.

[0032] In one example, Figure 4 As shown, an elastic tube 248 is fixedly provided on the inner wall of the blocking tube 244, and the elastic tube 248 cover is arranged outside the air guide box 243, and the lower end of the elastic tube 248 is fixedly connected to the upper end face of the sliding ring 247, and the sliding ring 247 is fixedly sleeved outside the air guide box 243, and the sliding ring 247 is slidingly arranged with the support tube 23. In this embodiment, the combined structure of the sliding ring 247 and the elastic tube 248 can play a role in connecting and sealing. Specifically, when the air guide box 243 and the blocking tube 244 are separated, the combined structure of the sliding ring 247 and the elastic tube 248 can achieve communication between the air guide box 243 and the blocking tube 244, thereby preventing gas from escaping from between the air guide box 243 and the blocking tube 244.

[0033] In order to better prevent dust or solid particles from entering the support tube 23, in one embodiment, Figure 2 and Figure 5As shown, the gas sampling device based on the fire-fighting drone also includes a blocking mechanism 3 for blocking the lower end opening of the support tube 23; the blocking mechanism 3 includes a blocking plate 31 that is arranged on the lower end of the support tube 23, and the blocking plate 31 can move left and right in the horizontal direction. In one example, a sealing gasket (not shown) is arranged on the upper end surface of the blocking plate 31, and the setting of the sealing gasket can achieve better sealing at the contact between the blocking plate 31 and the support tube 23; a U-shaped plate 34 is fixedly connected to the side wall of the blocking plate 31, and the free end of the U-shaped plate 34 is fixed The support slide block 33 is fixedly connected to the support slide block 33, and the support slide block 33 is slidably set in the support slide groove 32. The support slide groove 32 is opened on the outer wall of the support tube 23. The setting of the combined structure of the support slide groove 32, the support slide block 33 and the U-shaped plate 34 in this embodiment can realize the role of guiding support and limiting the blocking plate 31. Through the guiding support role, the blocking plate 31 can only move in the horizontal direction. Through the limiting role, the left and right movement distance of the blocking plate 31 can be kept constant. At the same time, it can prevent the blocking plate 31 from detaching from the support tube 23.

[0034] In order to achieve intelligent control of the movement of the blocking plate 31, in one embodiment, Figure 2 and Figure 5 As shown, the gas sampling device based on the fire-fighting drone also includes a driving mechanism 4, and the driving mechanism 4 includes a first driving part for driving the sealing plate 31 to move in the horizontal direction. The first driving part includes a driving cylinder 41 fixedly arranged on the outer wall of the support tube 23, and the driving end (which can be understood as the right end) of the driving cylinder 41 is connected to a cylinder arm 42, and the free end (which can be understood as the right end) of the cylinder arm 42 is fixedly connected to the first rod 43, and a second rod 45 is arranged on the side wall of the first rod 43, which can be understood as the second rod 45 is arranged on the left side wall of the first rod 43 and close to the lower end of the first rod 43; the free end (which can be understood as the left end) of the second rod 45 is fixedly connected to the side wall of the sealing plate 31.

[0035] The first driving unit in this embodiment is provided to drive the blocking plate 31 to move left and right in the horizontal direction. Specifically, when the first sensor senses that the drone body 1 moves to the top of the thick smoke, it controls the driving cylinder 41 to start. The start of the driving cylinder 41 will drive the cylinder arm 42 to move rightward. The rightward movement of the cylinder arm 42 will drive the blocking plate 31 to move rightward through the first rod 43 and the second rod 45. The rightward movement of the blocking plate 31 will open the lower end opening of the support tube 23, so that smoke sampling can be carried out. The rightward movement of the blocking plate 31 stops until the support slider 33 and the right side wall of the support slide groove 32 collide with each other. At this time, the lower end opening of the support tube 23 is completely opened.

[0036] When the support slider 33 and the right side wall of the support slot 32 collide with each other, in order to allow the cylinder arm 42 to continue to move to the right, in one embodiment, Figure 5 As shown, the first driving part also includes a first guide assembly 44 disposed between the first rod 43 and the second rod 45 and used to connect the first rod 43 and the second rod 45. In one example, the first guide assembly 44 includes a first guide rod 441, a first guide cylinder 442 and a first guide spring 443, the first guide rod 441 is movably inserted in the first guide cylinder 442, the first guide spring 443 is wound outside the first guide rod 441, one end (which can be understood as the right end) of the first guide spring 443 is fixedly connected to the side wall of the first guide rod 441, and the other end (which can be understood as the left end) of the first guide spring 443 is fixedly connected to the outer side wall of the first guide cylinder 442. The setting of the first guide assembly 44 in this embodiment utilizes its own retractable characteristics to ensure that when the supporting slider 33 and the right side wall of the supporting slide groove 32 conflict with each other, the cylinder arm 42 can still continue to move to the right; at the same time, the setting of the first guide assembly 44 not only has the function of connecting the first rod 43 and the second rod 45, but also has the function of guiding and limiting, so that the first rod 43 can only move in the horizontal direction, and the setting of the first guide assembly 44 can also provide a reset force when the first rod 43 resets.

[0037] It is worth noting that, in other embodiments, the first guide assembly 44 is not limited to a combined structure including the first guide rod 441 , the first guide cylinder 442 and the first guide spring 443 .

[0038] In one embodiment, the driving mechanism 4 further includes a second driving part, which is used to drive the up and down movement of the combined structure of the buckle groove 241, the guide tube 242 and the air guide box 243; the second driving part includes a push-pull rod 46, one end (which can be understood as the lower end) of the push-pull rod 46 is hinged on the upper end surface of the cylinder arm 42, such as Figure 5 As shown. The other end of the push-pull rod 46 (which can be understood as the upper end) passes through the through hole 47 and is hinged on the movable plate 48. In this example, the push-pull rod 46 is arranged to be inclined upward. The through hole 47 is provided on the support tube 23, and the movable plate 48 is movably arranged in the movable groove 49. Specifically, the movable plate 48 can slide up and down in the movable groove 49. The movable groove 49 is provided on the inner side wall of the support tube 23, and the movable groove 49 is interconnected with the through hole 47. A fixed block 410 is fixedly connected to the side of the movable plate 48 away from the push-pull rod 46, and the fixed block 410 is interconnected with the air guide box 243, as shown in FIG. Figure 2 and Figure 3 shown.

[0039] In this embodiment, the second driving part is used to drive the up and down movement of the combined structure of the buckle groove 241, the conducting tube 242 and the air guide box 243, and the second driving part and the first driving part share the same driving source driving cylinder 41, so that the cost saving effect is achieved by saving the number of power sources. At the same time, the driving cylinder 41 can synchronously control the first driving part and the second driving part, on the one hand, to realize the linkage of the equipment and improve the production efficiency, and on the other hand, to realize the synchronous adjustment of the blocking plate 31 and the combined structure of the buckle groove 241, the conducting tube 242 and the air guide box 243. Specifically, when the cylinder arm 42 moves the blocking plate 31 to the right, it will also pull the movable plate 48 downward through the push-pull rod 46. The downward movement of the movable plate 48 will move the combined structure of the buckle groove 241, the conducting tube 242 and the air guide box 243 downward through the fixed block 410, thereby realizing the synchronous adjustment of the combined structure of the buckle groove 241, the conducting tube 242 and the air guide box 243 and the movement of the blocking plate 31. Of course, in other examples, the first driving unit and the second driving unit may also be provided with different power sources.

[0040] After the sampling is completed, it is necessary to add a detection device to detect the sample. In order to ensure the accuracy of the test results, the same sample is generally tested multiple times, and the accuracy of the test results is achieved through review. However, the existing sample storage box 21 is an integral structure, and the sampling volume is manually controlled each time. In this way, there will be a problem of different sampling volumes. Therefore, due to the different sample volumes during the test, there will be differences in the test results, thereby affecting the accuracy of the test results. In order to solve the above problem, in one embodiment, as shown in FIG. Figure 6 As shown, the gas sampling device based on the fire-fighting drone also includes a portioning mechanism 5, and the portioning mechanism 5 is configured to package and store the sample body to ensure that the quantity of each storage is consistent. In this way, in subsequent detection, only a single storage quantity needs to be extracted to ensure that the sampling quantity is consistent each time, thereby avoiding the impact on the detection result caused by inconsistent sampling quantities.

[0041] In one example, Figure 6As shown, the component mechanism 5 includes M component boxes 51, and the M component boxes 51 are all fixedly arranged in the sample storage box 21. The sample storage box 21 is provided with a sealing cover 53 through a thread, and the sealing cover 53 is used to seal the sample outlet of the component box 51. It can be understood that a catheter (not shown) is fixedly plugged into the sample storage box 21, and a thread is provided on the outer side wall of the catheter outside the sample storage box 21. The sealing cover 53 is screwed on the outside of the catheter through the thread for sealing, wherein the catheter is connected to the component box 51, and M is a positive integer greater than or equal to 2. In the actual design process, the number of component boxes 51 can be set to 2, 3 or more, and the standards of the component boxes 51 are consistent. The upper end of the component box 51 is connected to one end (which can be understood as the lower end) of the first air duct 52, which can be fixedly plugged into the top plate of the component box 51, and the other end (which can be understood as the upper end) of the first air duct 52 is connected to the suction port of the suction machine 22, and the upper end of the first air duct 52 can extend to the inside of the suction port. The lower end of the component box 51 is connected to a second air duct 54, which is fixedly plugged into the bottom plate of the component box 51 and fixedly plugged into the bottom plate of the sample storage box 21; the lower end of the second air duct 54 extends into the support tube 23 and is connected to the inner cavity of the support tube 23. During operation, the gas entering the support tube 23 enters the component box 51 through the second air duct 54 for storage.

[0042] In order to ensure that the sample volume in the component box 51 does not change after the sampling is completed, in one embodiment, Figure 7As shown, the gas sampling device based on the firefighting drone also includes a pushing mechanism 6. The setting of the pushing mechanism 6 can be used to block the lower end of the second air guide pipe 54 to prevent the sample volume in the component box 51 from changing. The pushing mechanism 6 includes a partition 61 fixedly arranged on the inner side wall of the support tube 23, and the partition 61 divides the inner cavity of the support tube 23 into two cavities that are not connected to each other. A pushing rod 62 is movably inserted in the middle of the partition 61, and the pushing rod 62 can move up and down on the partition 61. The lower end of the push rod 62 is movably inserted in the blocking tube 244 and fixedly connected to the outer top wall of the air guide box 243. The upper end of the push rod 62 is fixedly sleeved with a first piston 63. The first piston 63 is slidably set in the support tube 23. The setting of the first piston 63 can achieve the separation of the upper and lower cavities of the first piston 63, so that the upper and lower cavities are not connected; a leakproof plate 64 is fixedly set on the inner side wall of the support tube 23. The leakproof plate 64 is fixedly sleeved outside the second air guide tube 54. The setting of the leakproof plate 64 plays a role of separation, so that the gas will not move to the top of the leakproof plate 64, but will only enter the component box 51 through the second air guide tube 54. The lower end surface of the leakproof plate 64 is flush with the lower end of the second air guide tube 54, and the lower end surface of the leakproof plate 64 and the lower end of the second air guide tube 54 are both set to conflict with each other on the upper end surface of the first piston 63. This setting ensures that there is no gas between the leakproof plate 64 and the first piston 63. A plurality of first holes 65 are provided on the rod body of the push rod 62, a second hole 66 is provided inside the push rod 62, an upper end opening of the second hole 66 is provided at the upper end of the push rod 62, when the first piston 63 is in contact with the leak-proof plate 64, the upper end opening of the second hole 66 is blocked by the leak-proof plate 64; the second hole 66 and a plurality of the first holes 65 are connected to each other, in this embodiment, the first hole 65 and the second hole 66 can introduce gas from the bottom of the partition 61 to the top of the partition 61.

[0043] When the air guide box 243 moves downward to take samples, it will bring the push rod 62 downward. The downward movement of the push rod 62 will bring the combined structure of the first hole 65 and the second hole 66 downward. When the first hole 65 moves to the bottom of the partition 61, the gas will enter the component box 51 through the first hole 65, the second hole 66 and the second air guide tube 54 in sequence; when the sampling is completed and the air guide box 243 moves upward, the push rod 62 will also move upward synchronously. When the first hole 65 moves to the inside or above the partition 61, the gas will stop storing in the component box 51. At this time, with the upward movement of the push rod 62, the first piston 63 will move upward. When the first piston 63 contacts the leak-proof plate 64, the lower end opening of the second air guide tube 54 is blocked to ensure that the sample volume in the component box 51 will not change. It should be noted that the suction machine 22 will stop working only when the first piston 63 contacts the leak-proof plate 64. The purpose of this setting is to ensure that the sample can be completely sucked into the component box 51.

[0044] In order to improve the intelligence of the sampling mechanism 2, when the gas in the component box 51 reaches a certain amount, which can also be understood as having a certain gas pressure, the device stops sampling, and the blocking plate 31 moves in the reverse direction to block the opening of the support tube 23. Specifically, in one embodiment, Figure 8 As shown, the gas sampling device based on the fire-fighting drone also includes a second sensor 7 arranged inside the second air duct 54, and the second sensor 7 is used to detect the gas pressure in the second air duct 54 in real time; of course, in other examples, the second sensor 7 can also be arranged in the component box 51, or both the component box 51 and the second air duct 54 are provided.

[0045] The second sensor 7 in this embodiment is provided to control the sampling process through the Internet of Things control system. Specifically, when the second sensor 7 senses that the component box 51 has a set amount of gas, it will control the driving cylinder 41 to provide a driving force in the reverse direction, thereby driving the cylinder arm 42 to move to the left. The leftward movement of the cylinder arm 42, on the one hand, pushes the movable plate 48 upward through the push-pull rod 46, so that the movable plate 48 moves upward with the air guide box 243 through the fixed block 410. The upward movement of the air guide box 243 will cause the conducting tube 242 and the snap-fitting groove 241 to retract upward into the support tube 23; on the other hand, it drives the sealing plate 31 to move to the left to complete the sealing of the lower end opening of the support tube 23. It is worth noting that due to the presence of the first guide assembly 44, the sealing plate 31 will be driven to move to the left only after the snap-fit ​​groove 241 retracts into the support tube 23. When the sealing plate 31 completes the sealing of the lower end opening of the support tube 23, the air guide box 243 also interferes with the sealing gasket 245, and the air guide hole 246 is blocked.

[0046] The second sensor 7 in this embodiment is also used to sense the contact state between the first piston 63 and the anti-leakage plate 64. When the contact state is sensed, it is used to control the closing of the suction machine 22.

[0047] In order to make the device suitable for more application scenarios, especially when the IoT is not smooth in the mountains, the device can still control the time node when the sampling amount is sufficient. In one embodiment, it also includes a control mechanism 8. The control mechanism 8 is set to control the time node when the sampling amount is sufficient through the promotion of air pressure. In one example, Fig. 9 As shown, the control mechanism 8 includes a soft rod 81 fixedly connected to the upper end of the push rod 62, a third hole 82 is opened inside the soft rod 81, the third hole 82 is connected to the second hole 66, and a second piston 83 is fixedly sleeved outside the soft rod 81. Preferably, the soft rod 81 is arranged in the middle of the second piston 83. The second piston 83 is slidably arranged with the inner wall of the support tube 23, so that there is no gap at the contact point between the second piston 83 and the support tube 23, and the gas will not leak downward; a first electrode contact 84 is fixedly arranged on the lower end surface of the second piston 83, and a second electrode contact 85 is matched below the first electrode contact 84, and the second electrode contact 85 is fixedly arranged on the upper end surface of the first piston 63. During operation, as the air pressure in the component box 51 and the second air guide tube 54 increases, it will react on the second piston 83 and push the second piston 83 downward relative to the first piston 63. As the movement proceeds, the first electrode contact 84 and the second electrode contact 85 will contact each other. When the first electrode contact 84 and the second electrode contact 85 are in contact, the series circuit is connected. At this time, the driving cylinder 41 will be controlled to move in the opposite direction to complete the reset process of the above-mentioned blocking plate 31 and the air guide box 243, which will not be repeated here.

[0048] In one example, Fig. 9 As shown, a plurality of second guide assemblies 86 are fixedly arranged on the upper end surface of the first piston 63, the upper end of the second guide assembly 86 is fixedly connected to the lower end surface of the second piston 83, the second guide assembly 86 comprises a second guide rod 861, a second guide cylinder 862 and a second guide spring 863, the second guide rod 861 is movably inserted in the second guide cylinder 862, the second guide spring 863 is wound and arranged outside the second guide rod 861, and the two ends of the second guide spring 863 are respectively fixedly connected to the side wall of the second guide rod 861 and the outer side wall of the second guide cylinder 862. The arrangement of the second guide assembly 86 in this embodiment can not only play the role of guiding support for the movement of the second piston 83, so that the second piston 83 can only move in the vertical direction, but also provide a reset force for the reset process of the second piston 83.

[0049] It is worth noting that the second sensor 7 and the control mechanism 8 can control the device independently or simultaneously. In one example, a second sensor 7 is provided in the second air duct 54 and / or the component box 51. At the same time, a control mechanism 8 is provided above the first piston 63. This can achieve a better control effect on the device and ensure the linkage between mechanical control and Internet of Things control.

[0050] The thick smoke from a fire will carry a lot of solid waste. In the prior art, a filtering process needs to be added after the thick smoke is sampled to remove the solid waste in the smoke. On the one hand, the increase in the process will reduce the subsequent detection efficiency. On the other hand, the addition of filtering equipment will increase the production cost. Therefore, in order to solve the above problems, in one embodiment, as Fig.10 As shown, the air guide box 243 is provided with a filter screen 9 and a guide plate 10. The guide plate 10 is arranged below the filter screen 9. When working, the filter screen 9 filters the solid waste carried in the gas, and the guide plate 10 is used to guide the solid waste filtered by the filter screen 9 into the guide pipe 242 to be discharged.

[0051] It is worth noting that the first sensor and the second sensor 7 in the present invention both adopt an Internet of Things control system.

[0052] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A gas sampling device based on a firefighting drone, characterized in that: The invention comprises an unmanned aerial vehicle (UAV) body (1), the unmanned aerial vehicle (UAV) body (1) being provided with a first sensor, and a sampling mechanism (2) arranged on the bottom plate of the unmanned aerial vehicle (1), the sampling mechanism (2) comprising a sample storage box (21) fixedly arranged on the bottom plate of the unmanned aerial vehicle (1), and a suction machine (22) connected to and arranged on the top plate of the sample storage box (21), a support pipe (23) being connected to and arranged on the bottom plate of the sample storage box (21), the lower end of the support pipe (23) being arranged higher than the lower end of the unmanned aerial vehicle (1) in the vertical direction, a sampling head assembly (24) being arranged in communication with the inner cavity of the sample storage box (21), and when in operation, the lower end of the sampling head assembly (24) moves to the outside of the lower end opening of the support pipe (23) so as to extend into thick smoke to sample gas; The sampling head assembly (24) comprises a snap-fit ​​groove (241) and an air guide box (243) movably arranged in the support tube (23), and a communication tube (242) arranged between the snap-fit ​​groove (241) and the air guide box (243) and used for connecting the snap-fit ​​groove (241) and the air guide box (243). The upper end of the air guide box (243) is arranged as an arc surface, and the upper end of the air guide box (243) extends into the blocking tube (244) and is arranged to contact the inner side wall of the blocking tube (244). The blocking tube (244) is fixedly arranged on the inner side wall of the support tube (23). The air guide box (242) is arranged between the snap-fit ​​groove (241) and the air guide box (243). An air guide hole (246) is provided on the arc surface of the blocking tube (244), a sealing gasket (245) is fixedly provided on the inner wall of the blocking tube (244), the sealing gasket (245) and the air guide box (243) are arranged to contact each other, an elastic tube (248) is fixedly provided on the inner wall of the blocking tube (244), the elastic tube (248) is covered outside the air guide box (243), and the lower end of the elastic tube (248) is fixedly connected to the upper end surface of the sliding ring (247), the sliding ring (247) is fixedly sleeved outside the air guide box (243), and the sliding ring (247) and the support tube (23) are slidably arranged; It also comprises a component mechanism (5), the component mechanism (5) comprising M component boxes (51), the M component boxes (51) are all fixedly arranged in the sample storage box (21), a sealing cover (53) is arranged on the sample storage box (21) by means of a thread, the sealing cover (53) is used to seal the sample outlet of the component box (51), the upper end of the component box (51) is connected to one end of a first air guide tube (52), the other end of the first air guide tube (52) is connected to the suction port of the suction machine (22), the lower end of the component box (51) is connected to a second air guide tube (54), the lower end of the second air guide tube (54) extends into the support tube (23) and is connected to the inner cavity of the support tube (23), and M is a positive integer greater than or equal to 2; The invention also comprises a pushing mechanism (6), wherein the pushing mechanism (6) comprises a partition (61) fixedly arranged on the inner side wall of the support tube (23), a pushing rod (62) movably inserted in the middle of the partition (61), the lower end of the pushing rod (62) movably inserted in the blocking tube (244) and fixedly connected to the outer top wall of the air guide box (243), a first piston (63) is fixedly sleeved on the outer side of the upper end of the pushing rod (62), the first piston (63) is slidably arranged in the support tube (23), a leak-proof plate (64) is fixedly arranged on the inner side wall of the support tube (23), and the leak-proof plate (64) The fixed sleeve is arranged outside the second air guide tube (54), the lower end surface of the leak-proof plate (64) is flush with the lower end of the second air guide tube (54), and the lower end surface of the leak-proof plate (64) and the lower end of the second air guide tube (54) are both arranged to abut against the upper end surface of the first piston (63), a plurality of first holes (65) are opened on the rod body of the push rod (62), a second hole (66) is opened inside the push rod (62), the upper end opening of the second hole (66) is arranged at the upper end of the push rod (62), and the second hole (66) and the plurality of the first holes (65) are arranged to be connected with each other.

2. The gas sampling device based on a firefighting drone according to claim 1 is characterized in that: It also includes a blocking mechanism (3) for blocking the lower end opening of the support tube (23), the blocking mechanism (3) including a blocking plate (31) disposed on the lower end of the support tube (23), a U-shaped plate (34) being fixedly connected to the side wall of the blocking plate (31), a free end of the U-shaped plate (34) being fixedly connected to a support slider (33), the support slider (33) being slidably disposed in a support slide groove (32), and the support slide groove (32) being provided on the outer side wall of the support tube (23).

3. The gas sampling device based on a firefighting drone according to claim 2 is characterized in that: The invention also comprises a driving mechanism (4), wherein the driving mechanism (4) comprises a first driving part for driving the blocking plate (31) to move in a horizontal direction, wherein the first driving part comprises a driving cylinder (41) fixedly arranged on the outer wall of the support tube (23), wherein the driving end of the driving cylinder (41) is connected to a cylinder arm (42), wherein the free end of the cylinder arm (42) is fixedly connected to a first rod (43), wherein a second rod (45) is arranged on the side wall of the first rod (43), and wherein the free end of the second rod (45) is fixedly connected to the side wall of the blocking plate (31).

4. The gas sampling device based on a firefighting drone according to claim 3 is characterized in that: The first driving part also includes a first guide assembly (44) which is arranged between the first rod (43) and the second rod (45) and is used to connect the first rod (43) and the second rod (45). The first guide assembly (44) includes a first guide rod (441), a first guide cylinder (442) and a first guide spring (443). The first guide rod (441) is movably inserted in the first guide cylinder (442). The first guide spring (443) is wound around the outside of the first guide rod (441). One end of the first guide spring (443) is fixedly connected to the side wall of the first guide rod (441), and the other end of the first guide spring (443) is fixedly connected to the outer side wall of the first guide cylinder (442).

5. The gas sampling device based on a firefighting drone according to claim 3 is characterized in that: The driving mechanism (4) also includes a second driving part, which includes a push-pull rod (46), one end of which is hinged on the upper end surface of the cylinder arm (42), and the other end of which passes through a through hole (47) and is hinged on a movable plate (48), wherein the through hole (47) is provided on the support tube (23), and the movable plate (48) is movably arranged in a movable groove (49), wherein the movable groove (49) is provided on the inner side wall of the support tube (23), and the movable groove (49) and the through hole (47) are interconnected, and a fixed block (410) is fixedly connected to the side of the movable plate (48) away from the push-pull rod (46), and the fixed block (410) is interconnected with the air guide box (243).

6. The gas sampling device based on a firefighting drone according to claim 1 is characterized in that: It also comprises a second sensor (7) arranged inside the second air duct (54), wherein the second sensor (7) is used to detect the gas pressure inside the second air duct (54) in real time.

7. The gas sampling device based on a firefighting drone according to claim 1 is characterized in that: The control mechanism (8) further comprises a soft rod (81) fixedly connected to the upper end of the push rod (62), a third hole (82) being provided inside the soft rod (81), the third hole (82) being connected to the second hole (66), a second piston (83) being fixedly sleeved outside the soft rod (81), the second piston (83) being slidably arranged with the inner side wall of the support tube (23), a first electrode contact sheet (84) being fixedly arranged on the lower end surface of the second piston (83), a second electrode contact sheet (85) being matched and arranged below the first electrode contact sheet (84), the second electrode contact sheet (85) being fixedly arranged on the upper surface of the first piston (63) On the end surface, a plurality of second guide assemblies (86) are fixedly arranged on the upper end surface of the first piston (63), the upper end of the second guide assembly (86) is fixedly connected to the lower end surface of the second piston (83), the second guide assembly (86) comprises a second guide rod (861), a second guide cylinder (862) and a second guide spring (863), the second guide rod (861) is movably inserted in the second guide cylinder (862), the second guide spring (863) is wound and arranged outside the second guide rod (861), and the two ends of the second guide spring (863) are respectively fixedly connected to the side wall of the second guide rod (861) and the outer side wall of the second guide cylinder (862).

Images