An exploration device for a ventilation duct

Abstract

The application discloses a kind of survey devices for ventilation duct, belong to pipeline detection technical field.A kind of survey devices for ventilation duct, including drive box, the lower sides of the drive box are provided with walking wheel, and the connecting rod one is connected between same side two walking wheels, the lower side of the drive box is also provided with filling assembly, the lower side of the filling assembly is connected with suction disc, the side of the drive box is provided with two mounting brackets, and the LED lamp tube is connected between two mounting brackets.The survey device for ventilation duct, by setting suction disc and filling assembly, so that the device can automatically detect the leakage on the inner wall of ventilation duct by suction disc, and the leakage is filled by filling assembly, so as to greatly reduce the working strength of staff, also reduce the difficulty when the air tightness of ventilation duct is detected, so that the device has higher practical performance.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, and more specifically, to an inspection device for ventilation ducts. Background Technology

[0002] After the ventilation ducts are installed, an airtightness test must be conducted before they can be handed over to the next process. Current testing methods generally include light leakage detection and air leakage testing. Light leakage detection uses the penetrating power of light through small holes to test the duct. However, during the test, workers need to hold a light source and move it along the duct. Since the duct is located above the worker, holding the light source for a long time causes hand fatigue and increases workload. Air leakage testing uses a leak detection fan to inject air into the duct cavity. However, leak detection fans are large and difficult to move, wasting manpower. Designing an automatic detector within the ventilation duct and locating the gap after detection is a major challenge. Building ventilation ducts are complex, and their distribution varies from building to building. Establishing a coordinate system applicable to most buildings is impractical. If the device itself is used for positioning, it needs to stop at the detected gap and wait for workers to arrive before continuing, significantly reducing work efficiency.

[0003] Based on this, the present invention designs an inspection device for ventilation ducts to solve the above problems. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] The purpose of this invention is to provide an inspection device for ventilation ducts to solve the problems mentioned in the background art.

[0006] 2. Technical Solution

[0007] An inspection device for ventilation ducts includes a drive box, with wheels on both sides below the drive box and a connecting rod connecting the two wheels on the same side. A filling component is also provided below the drive box, with a suction cup connected below the filling component. Two mounting brackets are provided on the side of the drive box, and an LED light tube is connected between the two mounting brackets.

[0008] The filling assembly includes an electric push rod disposed within the drive box cavity. The telescopic end of the electric push rod passes through the drive box and is connected to a connecting plate. A fixed sleeve is connected to the middle of the lower part of the connecting plate. A spring is disposed within the cavity of the fixed sleeve. A movable rod is connected to the bottom end of the spring. A storage cylinder is slidably connected to the outer side of the fixed sleeve. The storage cylinder is fixed to a suction cup, and a discharge port is opened at the bottom of the storage cylinder. The movable rod passes through the discharge port and is connected to a sealing ball. A telescopic rod is connected to one side of the lower part of the connecting plate. The lower part of the telescopic rod is connected to the suction cup, and a fixed cylinder is connected to the other side of the lower part of the connecting plate. A second connecting rod is slidably connected inside the fixed cylinder. One end of the second connecting rod is connected to the suction cup, and the other end of the second connecting rod extends into the cavity of the drive box and is connected to a wedge-shaped piece.

[0009] Preferably, the second connecting rod is connected to a limiting plate located below the outside of the fixed cylinder.

[0010] Preferably, the inner cavity of the drive box is provided with a moving assembly, which includes a motor disposed at the bottom of the inner cavity of the drive box. A drive wheel is connected to the output shaft of the motor, and a rotating plate is connected to the end of the motor output shaft through a bearing. A rotating rod is connected to the lower ends of both ends of the rotating plate through bearings. An arc-shaped groove is opened at the bottom of the inner cavity of the drive box. The bottoms of the two rotating rods are movably connected to the arc-shaped groove. A friction wheel and a driven wheel are disposed on the rotating rod away from the connecting rod. A belt is sleeved between the driven wheel and the drive wheel. The drive box also includes a rotating rod two disposed at the bottom of the inner cavity of the drive box. A friction wheel two is disposed at one end of the rotating rod two, and the other end of the rotating rod two passes through the drive box and is connected to a bevel gear one. The friction wheel two contacts the friction wheel one but is not connected. The outer edge of the bevel gear one meshes with the bevel gear two. The bevel gear two is fixed to the outside of the connecting rod one.

[0011] Preferably, the rotating plate contacts the wedge-shaped member but is not connected to it.

[0012] Preferably, an elastic sheet is abutted against the outer side of the rotating plate, and the elastic sheet is fixed to the inner wall of the drive box.

[0013] Preferably, a lubrication assembly is provided at the bottom of the drive box on the side away from the LED tube. The lubrication assembly includes a liquid storage tank connected to the bottom of the drive box. A push plate that fits into the liquid storage tank is movably connected to the inner cavity of the liquid storage tank. A threaded sleeve is connected to the side of the push plate. The threaded sleeve extends through the liquid storage tank and outwards. A threaded rod is threadedly connected to the inner cavity of the threaded sleeve. A bevel gear is connected to the end of the threaded rod. The bevel gear meshes with a bevel gear. The threaded sleeve is fixed to the bottom of the drive box by a connector. A liquid outlet groove is provided below the side of the liquid storage tank away from the threaded sleeve. A liquid outlet assembly is connected to the liquid storage tank below the liquid outlet groove.

[0014] Preferably, the liquid dispensing assembly includes a hinge plate hinged to the bottom of the liquid storage tank, and a plurality of springs are connected above the hinge plate. The plurality of springs are connected by a mounting plate, and the mounting plate is fixed to the side of the liquid storage tank.

[0015] Preferably, the side of the drive box is also provided with a plurality of adjusting wheel assemblies. The adjusting wheel assembly includes a threaded rod II fixed to the outside of the drive box by bearings. A turntable is fixed on the threaded rod II, and a threaded sleeve II is threadedly connected to the outside of the threaded rod II. A connecting frame is connected to the end of the threaded sleeve II. An auxiliary wheel is provided on the connecting frame. A connecting lug is provided on the outside of the threaded sleeve II. A guide rod is slidably connected to the connecting lug. One end of the guide rod is fixed to the drive box, and the other end of the guide rod is connected to a limit block.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the advantages of this invention are:

[0018] 1) In this invention, by setting a suction cup and a filling component, the device can automatically detect the holes on the inner wall of the ventilation duct through the suction cup and fill the holes through the filling component. During the filling process, some material will leak out from the gap, making it easier for workers to find the gap on the outside of the duct, thereby greatly reducing the workload of workers and reducing the difficulty of testing the airtightness of the ventilation duct, making the device highly practical.

[0019] 2) In this invention, by setting a moving component, the device can autonomously stop moving when a hole is detected, thereby avoiding deviation between the filling material and the hole caused by the movement of the device when the filling component is filling the hole. This improves the accuracy of the device in filling holes and thus improves the filling effect of the device.

[0020] 3) In this invention, by setting a lubrication component, the device lubricates the inner wall of the pipe when it moves, thereby facilitating the movement of the suction cup on the inner wall of the pipe and preventing the inner wall of the pipe from becoming too dry, which would make it difficult for the suction cup to follow the device. Furthermore, when the device stops moving, it can control the lubricating material inside the liquid storage tank to stop flowing out, thereby avoiding waste of lubricating material and improving the rationality and practicality of the device.

[0021] 4) In this invention, by setting an adjusting wheel assembly, the device can adapt to ventilation ducts of different sizes. At the same time, since the threaded rod and the threaded sleeve are adjustable, it is easy to adjust the position of the drive box in the duct cavity. Thus, the device can perform all-round inspection of the ventilation duct, improving the flexibility of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0024] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0025] Figure 4 This is a partial schematic diagram of the internal structure of the drive box of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0027] Figure 6 This is a schematic diagram of the lubrication assembly structure of the present invention;

[0028] Figure 7 This is a partial cross-sectional view of the filling component structure of the present invention;

[0029] Figure 8 For the whole of the present invention Figure 7 Enlarged view of the structure at point C;

[0030] Figure 9 This is a schematic diagram of the adjusting wheel assembly structure of the present invention;

[0031] Figure 10 This is a schematic diagram of another embodiment of the present invention.

[0032] Explanation of the numbers in the diagram: 1. Drive box; 2. Wheel; 3. Connecting rod one; 4. Suction cup; 5. Filling assembly; 51. Electric push rod; 52. Connecting plate; 53. Fixing sleeve; 54. Spring one; 55. Movable rod; 56. Storage cylinder; 57. Discharge port; 58. Sealing ball; 59. Telescopic rod; 510. Fixing cylinder; 511. Connecting rod two; 512. Limiting plate; 513. Wedge; 6. Mounting bracket; 7. LED tube; 8. Moving assembly; 81. Motor; 82. Drive wheel; 83. Rotating plate; 84. Rotating rod one; 85. Arc groove; 86. Friction wheel one; 87. Driven wheel; 88. Belt; 89. 810. Rotating rod II; 811. Friction wheel II; 812. Bevel gear I; 813. Bevel gear II; 814. Elastic plate; 9. Lubrication assembly; 91. Liquid storage tank; 92. Push plate; 93. Threaded sleeve I; 94. Threaded rod I; 95. Bevel gear III; 96. Connecting piece; 97. Liquid outlet groove; 98. Hinge plate; 99. Spring II; 910. Mounting plate; 10. Adjusting wheel assembly; 101. Threaded rod II; 102. Turntable; 103. Threaded sleeve II; 104. Connecting frame; 105. Auxiliary wheel; 106. Connecting ear; 107. Guide rod; 108. Limiting block; 11. Handheld operator; 12. Display. Detailed Implementation

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Example 1: Please refer to Figures 1-9An inspection device for ventilation ducts includes a drive box 1, with two walking wheels 2 on both sides below the drive box 1, and a connecting rod 3 connecting the two walking wheels 2 on the same side. A filling component 5 is also provided below the drive box 1, and a suction cup 4 is connected below the filling component 5. Two mounting brackets 6 are provided on the side of the drive box 1, and an LED light tube 7 is connected between the two mounting brackets 6.

[0037] The filling component 5 includes an electric push rod 51 disposed inside the drive box 1. The telescopic end of the electric push rod 51 passes through the drive box 1 and is connected to a connecting plate 52. A fixed sleeve 53 is connected to the middle of the lower part of the connecting plate 52. A spring 54 is disposed inside the fixed sleeve 53. A movable rod 55 is connected to the bottom end of the spring 54. A storage cylinder 56 is slidably connected to the outer side of the fixed sleeve 53. The storage cylinder 56 is fixed to the suction cup 4, and a discharge port 57 is opened at the bottom of the storage cylinder 56. The movable rod 55 passes through the discharge port 57 and is connected to... There is a blocking ball 58, and a telescopic rod 59 is connected to one side below the connecting plate 52. The lower part of the telescopic rod 59 is connected to the suction cup 4, and the other side below the connecting plate 52 is connected to the fixing cylinder 510. A second connecting rod 511 is slidably connected inside the fixing cylinder 510. One end of the second connecting rod 511 is connected to the suction cup 4, and the other end of the second connecting rod 511 extends into the inner cavity of the drive box 1 and is connected to a wedge 513. The second connecting rod 511 is located below the outside of the fixing cylinder 510 and is connected to a limiting plate 512.

[0038] Specifically, the output end of the electric push rod 51 moves downward, causing the electric push rod 51 to drive the connecting plate 52 fixed to it to move downward. At this time, the spring 54 in the inner cavity of the fixed sleeve 53 is in a stretched state to prevent the photosensitive filling material in the inner cavity of the storage cylinder 56 from flowing out. During the descent, the connecting plate 52 simultaneously pushes the fixed sleeve 53, the telescopic rod 59, and the fixed cylinder 510 downward until the fixed cylinder 510 contacts the limiting plate 512 fixed on the connecting rod 511. At this time, the spring 54 is still in a stretched state, and the electric push rod 51 continues to push the connecting plate 52 downward. At this time, the telescopic rod 59 and the connecting rod 511 will push the suction cup 4 downward, so that the suction cup 4 is adsorbed on the inner wall of the pipe. When the device detects... When a leak occurs, gas fills the cavity of the suction cup 4, causing it to expand and move the storage cylinder 56 upwards. Because the atmospheric pressure is greater than the elastic force of the spring 54, the sealing ball 58, fixed below the movable rod 55, stays there for a short time, preventing it from blocking the outlet 57. At this point, the material inside the storage cylinder 56 flows out from the outlet 57 and fills the leak in the pipe wall. Then, the spring 54 pulls the sealing ball 58 upwards, causing it to block the outlet 57 again, preventing the photosensitive filling material inside the storage cylinder 56 from flowing out. The material is then irradiated by the LED tube 7 on the side of the drive box 1, causing it to solidify and fill the leak.

[0039] By incorporating a suction cup 4 and a filling component 5, the device can automatically detect leaks on the inner wall of the ventilation duct using the suction cup 4 and fill the leaks using the filling component 5. This greatly reduces the workload of workers and also reduces the difficulty of testing the airtightness of the ventilation duct, making the device highly practical.

[0040] Furthermore, the inner cavity of the drive box 1 is provided with a moving assembly 8, which includes a motor 81 located at the bottom of the inner cavity of the drive box 1. A drive wheel 82 is connected to the output shaft of the motor 81, and a rotating plate 83 is connected to the end of the output shaft of the motor 81 via a bearing. Rotating rods 84 are connected to the lower ends of both ends of the rotating plate 83 via bearings. An arc-shaped groove 85 is provided at the bottom of the inner cavity of the drive box 1. The bottoms of the two rotating rods 84 are movably connected to the arc-shaped groove 85. A friction wheel 86 and a driven wheel 87 are provided on the rotating rod 84 on the side away from the connecting rod 511. A sleeve is provided between the driven wheel 87 and the drive wheel 82. The system includes a belt 88; it also includes a rotating rod 89 disposed at the bottom of the inner cavity of the drive box 1, one end of the rotating rod 89 is provided with a friction wheel 810, and the other end of the rotating rod 89 passes through the drive box 1 and is connected to a bevel gear 811. The friction wheel 810 contacts the friction wheel 86 but is not connected. The outer edge of the bevel gear 811 meshes with a bevel gear 812. The bevel gear 812 is fixed to the outer side of the connecting rod 3. The rotating plate 83 contacts the wedge 513 but is not connected. In addition, the outer side of the rotating plate 83 abuts against an elastic sheet 813, which is fixed to the inner wall of the drive box 1.

[0041] Specifically, when the suction cup 4 detects a hole in the inner wall of the pipe, the suction cup 4 expands and drives the connecting rod 511 to move upward, thereby causing the wedge 513 to push the rotating plate 83 to rotate around the output shaft of the motor 81. This causes the rotating rod 84 to drive the friction wheel 86 to move in the arc groove 85, causing the friction wheel 86 to disengage from the friction wheel 810. At this time, the friction wheel 810 stops rotating, thereby controlling the device to stop moving.

[0042] By setting the moving component 8, the device can autonomously stop moving when a leak is detected, thereby avoiding deviation between the filling material and the leak caused by the movement of the device when the filling component 5 is filling the leak. This improves the accuracy of the device in filling leaks and thus enhances the filling effect of the device.

[0043] Furthermore, a lubrication assembly 9 is provided at the bottom of the drive box 1 on the side away from the LED tube 7. The lubrication assembly 9 includes a liquid storage tank 91 connected to the bottom of the drive box 1. A push plate 92 that fits into the liquid storage tank 91 is movably connected to the inner cavity of the liquid storage tank 91. A threaded sleeve 93 is connected to the side of the push plate 92. The threaded sleeve 93 penetrates the liquid storage tank 91 and extends outward. A threaded rod 94 is threadedly connected to the inner cavity of the threaded sleeve 93. A bevel gear 95 is connected to the end of the threaded rod 94. The bevel gear 95 and... The bevel gear 812 meshes with the threaded sleeve 93, which is fixed to the bottom of the drive box 1 by the connector 96. The liquid storage tank 91 has a liquid outlet groove 97 on the side away from the threaded sleeve 93. The liquid storage tank 91 is connected to the liquid outlet groove 97 below the liquid outlet assembly. The liquid outlet assembly includes a hinge plate 98 hinged to the bottom of the liquid storage tank 91. Several springs 99 are connected above the hinge plate 98. The springs 99 are connected by a mounting plate 910, which is fixed to the side of the liquid storage tank 91.

[0044] Specifically, when the device moves, bevel gear 2 812 drives bevel gear 3 95 to rotate, causing threaded rod 1 94 to rotate inside threaded sleeve 1 93. At this time, threaded sleeve 1 93 moves axially along threaded rod 1 94 and pushes push plate 92 to move in liquid storage tank 91. This causes push plate 92 to push the lubricating material in the inner cavity of liquid storage tank 91 to move. As the material space gradually decreases, the material pushes hinge plate 98 to rotate, allowing the lubricating material to flow through outlet groove 97 to the inner wall of the pipe, thus facilitating the movement of suction cup 4 on the inner wall of the pipe. When the trolley stops moving, bevel gear 2 812 stops rotating, causing push plate 92 to stop pushing the material. At this time, spring 2 99 fixed on hinge plate 98 pulls hinge plate 98 upward, causing hinge plate 98 to block outlet groove 97.

[0045] By setting the lubrication component 9, the device lubricates the inner wall of the pipe when it moves, which facilitates the movement of the suction cup 4 on the inner wall of the pipe and prevents excessive friction between the inner wall of the pipe and the suction cup, which would make it difficult for the suction cup 4 to follow the device. Furthermore, when the device stops moving, it can control the lubricating material inside the liquid storage tank 91 to stop flowing out, thereby avoiding waste of lubricating material and improving the rationality and practicality of the device.

[0046] Furthermore, the side of the drive box 1 is also provided with several adjusting wheel assemblies 10. The adjusting wheel assembly 10 includes a threaded rod 101 fixed to the outside of the drive box 1 by bearings. A turntable 102 is fixed on the threaded rod 101, and a threaded sleeve 103 is threadedly connected to the outside of the threaded rod 101. A connecting frame 104 is connected to the end of the threaded sleeve 103. An auxiliary wheel 105 is provided on the connecting frame 104. A connecting ear 106 is provided on the outside of the threaded sleeve 103. A guide rod 107 is slidably connected to the connecting ear 106. One end of the guide rod 107 is fixed to the drive box 1, and the other end of the guide rod 107 is connected to a limit block 108.

[0047] Specifically, rotating the turntable 102 causes the threaded rod 101 to rotate. Due to the restriction of the connecting lug 106 by the guide rod 107, the threaded sleeve 103 moves axially on the threaded rod 101, thereby causing the connecting frame 104 to drive the auxiliary wheel 105 to move axially along the threaded rod 101, so that the auxiliary wheel 105 fits against the inner wall of the pipe.

[0048] By setting the adjusting wheel assembly 10, the device can adapt to ventilation ducts of different sizes. At the same time, since the threaded rod 101 and the threaded sleeve 103 are adjustable, it is easy to adjust the position of the drive box 1 in the duct cavity. Thus, the device can perform all-round inspection of the ventilation duct, improving the flexibility of the device.

[0049] Working principle of this invention:

[0050] First, the turntable 102 is rotated, causing the threaded rod 101 to rotate. Due to the restriction of the connecting lug 106 by the guide rod 107, the threaded sleeve 103 moves axially on the threaded rod 101. This causes the connecting frame 104 to drive the auxiliary wheel 105 to move axially along the threaded rod 101, making the auxiliary wheel 105 fit against the inner wall of the pipe. Then, the output end of the electric push rod 51 is controlled to move downward, causing the electric push rod 51 to drive the connecting plate 52 fixed thereto to move downward. At this time, the spring 54 in the inner cavity of the fixed sleeve 53 is in a stretched state to prevent the photosensitive filling material in the inner cavity of the storage cylinder 56 from flowing out. During the descent, the connecting plate 52 simultaneously pushes the fixed sleeve 53, the telescopic rod 59, and the fixed cylinder. 510 moves downwards until the fixed cylinder 510 contacts the limiting plate 512 fixed on the connecting rod 511. At this time, the spring 54 is still in a stretched state, and the electric push rod 51 continues to push the connecting plate 52 downwards. At this time, the telescopic rod 59 and the connecting rod 511 will push the suction cup 4 downwards, so that the suction cup 4 is attached to the inner wall of the pipe. Then, the motor 81 is controlled to work, so that the motor 81 drives the drive wheel 82 to rotate, so that the drive wheel 82 drives the driven wheel 87 to rotate through the belt 88, which in turn drives the friction wheel 86 to rotate the friction wheel 810. At this time, the bevel gear 811 fixed at the end of the rotating rod 89 will drive the bevel gear 812 to rotate, so that the connecting rod 3 drives the traveling wheel 2 to rotate. This causes the device to move within the ventilation duct cavity. Simultaneously, bevel gear 812 drives bevel gear 95 to rotate, causing threaded rod 94 to rotate inside threaded sleeve 93. At this time, threaded sleeve 93 moves axially along threaded rod 94, pushing push plate 92 within liquid storage tank 91. This push plate 92 then moves the lubricating material within liquid storage tank 91. As the material space gradually decreases, the material pushes hinge plate 98 to rotate, allowing the lubricating material to flow through outlet groove 97 to the inner wall of the pipe, facilitating the movement of suction cup 4 within the pipe. When the device detects a leak, gas fills the inner cavity of suction cup 4, causing it to expand and move storage cylinder 56 upwards. As the atmospheric pressure exceeds the elastic force of spring 54, the speed at which suction cup 4 recovers is much greater than the speed at which sealing ball 58 rises. At this point, a gap exists between sealing ball 58 and the sealing outlet 57 at the bottom of storage cylinder 56, causing sealing ball 58 to no longer block outlet 57. Material inside storage cylinder 56 then flows out from outlet 57 and fills the gaps in the pipe wall. Spring 54 then pulls sealing ball 58 upwards, causing it to seal outlet 57 again, preventing the photosensitive filling material inside storage cylinder 56 from flowing out. The material is then irradiated by LED light tube 7 on the side of drive box 1, causing it to solidify and fill the gaps. As suction cup 4 expands, it drives connecting rod 511 upwards.This causes the wedge-shaped component 513 to push the rotating plate 83 to rotate around the output shaft of the motor 81. This, in turn, causes the rotating rod 84 to move the friction wheel 86 within the arc-shaped groove 85, disengaging the friction wheel 86 from the friction wheel 810. At this point, the friction wheel 810 stops rotating, thus stopping the device's movement. Simultaneously, because the bevel gear 812 stops rotating, the push plate 92 stops pushing the material. At this time, the spring 99 fixed to the hinge plate 98 pulls the hinge plate 98 upwards, sealing the outlet groove 97 and preventing material waste.

[0051] Example 2: A camera is installed at the front end of the drive box 1, and a handheld operator 11 and a display 12 are connected to the rear end of the drive box 1 via wires. By placing the drive box 1 into the ventilation duct, the camera will capture images of the duct in real time as the drive box 1 moves forward, and transmit them to the display 12 via wires. The operator can control the drive box 1 through the handheld operator 11, making the exploration more precise.

[0052] This invention can be used for rescue exploration during disasters, quickly locate the affected area, and provide assistance to rescue personnel.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inspection device for ventilation ducts, comprising a drive unit (1), characterized in that: The drive box (1) is provided with two walking wheels (2) on both sides below, and a connecting rod (3) is connected between the two walking wheels (2) on the same side. A filling component (5) is also provided below the drive box (1), and a suction cup (4) is connected below the filling component (5). Two mounting brackets (6) are provided on the side of the drive box (1), and an LED tube (7) is connected between the two mounting brackets (6). The filling component (5) includes an electric push rod (51) disposed in the inner cavity of the drive box (1). The telescopic end of the electric push rod (51) passes through the drive box (1) and is connected to a connecting plate (52). A fixed sleeve (53) is connected to the middle part below the connecting plate (52). A spring (54) is disposed in the inner cavity of the fixed sleeve (53). A movable rod (55) is connected to the bottom end of the spring (54). A storage cylinder (56) is slidably connected to the outer side of the fixed sleeve (53). The storage cylinder (56) is fixed to the suction cup (4), and a discharge port is opened at the bottom of the storage cylinder (56). The movable rod (55) passes through the discharge port (57) and is connected to the sealing ball (58). A telescopic rod (59) is connected to one side below the connecting plate (52). The lower part of the telescopic rod (59) is connected to the suction cup (4), and the other side below the connecting plate (52) is connected to the fixed cylinder (510). A connecting rod two (511) is slidably connected inside the fixed cylinder (510). One end of the connecting rod two (511) is connected to the suction cup (4), and the other end of the connecting rod two (511) extends into the inner cavity of the drive box (1) and is connected to the wedge (513). The second connecting rod (511) is located below the outside of the fixed cylinder (510) and connected to the limiting plate (512). The inner cavity of the drive box (1) is provided with a moving component (8). The moving component (8) includes a motor (81) located at the bottom of the inner cavity of the drive box (1). The output shaft of the motor (81) is connected to a drive wheel (82), and the end of the output shaft of the motor (81) is connected to a rotating plate (83) via a bearing. The lower ends of the rotating plate (83) are connected to rotating rods (84) via bearings. The bottom of the inner cavity of the drive box (1) is provided with an arc groove (85). The bottoms of the two rotating rods (84) are movably connected to the arc groove (85). The rotating rod (84) on the side away from the connecting rod (511) is provided with a friction wheel (86) and a driven wheel (87). A belt (88) is sleeved between the driven wheel (87) and the drive wheel (82). It also includes a rotating rod two (89) set at the bottom of the inner cavity of the drive box (1). One end of the rotating rod two (89) is provided with a friction wheel two (810), and the other end of the rotating rod two (89) passes through the drive box (1) and is connected to a bevel gear one (811). The friction wheel two (810) contacts the friction wheel one (86) but is not connected. The outer edge of the bevel gear one (811) meshes with the bevel gear two (812). The bevel gear two (812) is fixed to the outside of the connecting rod one (3).

2. The surveying device for ventilation ducts according to claim 1, characterized in that: The rotating plate (83) contacts but is not connected to the wedge (513).

3. The surveying device for ventilation ducts according to claim 1, characterized in that: An elastic sheet (813) abuts against the outer side of the rotating plate (83), and the elastic sheet (813) is fixed to the inner wall of the drive box (1).

4. The surveying device for ventilation ducts according to claim 1, characterized in that: A lubrication assembly (9) is provided at the bottom of the drive box (1) on the side away from the LED tube (7). The lubrication assembly (9) includes a liquid storage tank (91) connected to the bottom of the drive box (1). A push plate (92) that fits into the liquid storage tank (91) is movably connected to the inner cavity of the liquid storage tank (91). A threaded sleeve (93) is connected to the side of the push plate (92). The threaded sleeve (93) penetrates the liquid storage tank (91) and extends outward. The inner cavity is threaded with a threaded rod (94), and the end of the threaded rod (94) is connected to a bevel gear (95). The bevel gear (95) meshes with the bevel gear (812). The threaded sleeve (93) is fixed to the bottom of the drive box (1) by a connector (96). The liquid storage tank (91) is provided with a liquid outlet groove (97) on the side away from the threaded sleeve (93). The liquid storage tank (91) is connected to a liquid outlet assembly below the liquid outlet groove (97).

5. The surveying device for ventilation ducts according to claim 4, characterized in that: The liquid dispensing assembly includes a hinge plate (98) hinged to the bottom of the liquid storage tank (91). Several springs (99) are connected above the hinge plate (98). The springs (99) are connected by a mounting plate (910), and the mounting plate (910) is fixed to the side of the liquid storage tank (91).

6. The surveying device for ventilation ducts according to claim 1, characterized in that: The side of the drive box (1) is also provided with several adjusting wheel assemblies (10). The adjusting wheel assembly (10) includes a threaded rod two (101) fixed to the outside of the drive box (1) by a bearing. A turntable (102) is fixed on the threaded rod two (101), and a threaded sleeve two (103) is threadedly connected to the outside of the threaded rod two (101). A connecting frame (104) is connected to the end of the threaded sleeve two (103). An auxiliary wheel (105) is provided on the connecting frame (104). A connecting ear (106) is provided on the outside of the threaded sleeve two (103). A guide rod (107) is slidably connected to the connecting ear (106). One end of the guide rod (107) is fixed to the drive box (1), and the other end of the guide rod (107) is connected to a limit block (108).

Images