An apparatus for detecting the interior of an underground pipe

Abstract

The application discloses an underground pipeline internal detection equipment, and relates to the technical field of pipeline detection equipment, which comprises an annular base, a sliding rod, a rotating cylinder, a fixed cylinder, a bottom plate, a cross connecting plate and connecting columns, one annular base is fixed on each of the four ends of the cross connecting plate through the connecting columns, an operating mechanism is arranged on the upper end of the annular base, supporting assemblies are arranged on the lower ends of the four ends of the cross connecting plate, the rotating cylinder is rotatably arranged in the fixed cylinder, the bottom plate is arranged on the lower end of the rotating cylinder, a placing assembly is arranged on the lower end of the sliding rod, and a defogging mechanism is arranged on the front side of the placing assembly. The operating mechanism of the equipment is extended to the outside of the inspection well mouth, the risk of falling into the well for the operator is reduced, the shaking influence generated in the lowering process of the handheld equipment is avoided, the imaging is more stable, and the imaging range and the imaging quality are increased under the actions of the rotating mechanism and the defogging mechanism.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection equipment technology, and specifically to an internal inspection device for underground pipelines. Background Technology

[0002] Drainage pipes are an important part of drainage facilities. With the rapid development of cities, the normal operation of drainage pipes is indispensable. The normal operation of drainage pipes is inseparable from the periodic structural inspection of drainage facilities. In the periodic structural inspection, handheld pipe closed-circuit television (CCTV) inspection devices are usually used.

[0003] Existing handheld CCTV equipment typically consists of a telescopic mast, a camera, and a controller. The camera is mounted below the smallest movable section of the telescopic mast. During use, a person manually holds the fixed end of the mast and pulls it out section by section. After securing it, it continues to be lowered. Each section of the mast needs to be manually secured from above before the camera is finally lowered into the pipe. The camera then captures images of the pipe's interior and transmits them to the controller, allowing personnel above ground to observe and assess the pipe's internal conditions or collect image information. While existing handheld CCTV equipment can effectively perform pipe interior inspections, it still suffers from the following key drawbacks: Poor safety: Existing handheld CCTV equipment requires operators to always be above the wellhead. During the process of lowering the camera equipment, as the camera equipment extends into the well, the operator may tilt into the well due to the weight of the camera equipment and himself, which may easily lead to a fall into the well.

[0004] High labor costs and low operating efficiency: Existing handheld CCTV equipment requires continuous splicing and fixing of telescopic poles to lower the camera equipment to the required depth. However, as the spliced ​​telescopic poles become longer, the total length of the poles becomes excessive, making it extremely difficult for a single person to complete the inspection work. Especially when the well is deep, multiple people are usually required to assist in handheld operation, resulting in high labor costs and low operating efficiency. At the same time, improper splicing of traditional telescopic poles or aging and damage at the joints can lead to unstable connections, which can easily cause the camera equipment to fall into the well.

[0005] Poor imaging stability: Existing handheld CCTV equipment requires manual handling of a heavy telescopic pole, which can cause the pole to sway. When multiple people hold a single telescopic pole, the force applied during the lowering of the camera equipment is often inconsistent, resulting in severe swaying of the telescopic pole. This, in turn, causes the camera equipment lowered into the underground pipeline to shake. In particular, the longer the telescopic pole, the more pronounced the shaking of the underground camera equipment caused by the hand-held end, ultimately leading to insufficient image stability transmitted to the controller.

[0006] Camera lenses are prone to fogging: Due to the high humidity and significant temperature difference between the underground and surface environments, a large amount of water mist easily adheres to the lenses of the camera equipment after it is lowered into the mine, affecting the image quality.

[0007] To address the aforementioned issues, a device for detecting the interior of underground pipelines is proposed. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing an internal inspection device for underground pipelines. This addresses the safety issues raised in the background section regarding existing handheld CCTV equipment, which requires operators to remain above the manhole opening, posing a risk of falling during lowering due to the weight of the camera and the operator's own weight. Furthermore, it addresses the problem that existing handheld CCTV equipment requires the continuous addition of telescopic rods for lowering the equipment, leading to an increased overall length that is difficult for a single person to complete, often requiring multiple people to assist, resulting in high labor costs and low operational efficiency. It also addresses the issue that multiple people holding a single rod cause inconsistent force application during lowering, leading to rod swaying and consequently, shaking of the lowered equipment, ultimately resulting in unstable images transmitted to the controller. Finally, it addresses the problem that the high humidity and significant temperature difference between the underground and surface environments cause excessive water vapor to adhere to the camera lens after lowering, affecting image quality.

[0009] The technical solution adopted in this invention includes: a ground to be installed, a pipe to be inspected, a camera device, a ring base, a sliding rod, a rotating cylinder, a fixed cylinder, a chassis, a cross connecting plate, a connecting column, a support assembly, a placement assembly, an operating mechanism, a rotating mechanism, an axial displacement guiding mechanism, and a defogging mechanism; The upper end of the fixed cylinder is provided with a cross connecting plate, and the upper parts of the four ends of the cross connecting plate are respectively fixed with the same annular base by connecting columns. An operating mechanism is provided at the upper end of the annular base; The lower part of each of the four ends of the cross-shaped connecting plate is provided with a support component, and the support component is detachably connected to the ground to be installed. A rotating cylinder is rotatably inserted inside the fixed cylinder. The rotating cylinder and the cross connecting plate are rotatably inserted at the middle. The rotating cylinder and the center of the annular base are rotatably inserted. The rotating cylinder is driven to rotate by a rotating mechanism. The rotating mechanism is driven by the operating mechanism. The lower end of the rotating cylinder is provided with a base, which is movably located below the fixed cylinder; The rotating cylinder is threaded through with a sliding rod, which is movably connected to the chassis. The axial displacement guide mechanism is mounted on the annular base and connected to the sliding rod. The axial displacement guide mechanism is used to restrict the rotation of the sliding rod and allow the sliding rod to slide along the axial direction of the rotating cylinder. The rotating cylinder drives the axial displacement guide mechanism to work by rotating. The lower end of the sliding rod is provided with a placement component, which is rotatably located below the chassis; The placement component is detachably equipped with a camera device, and the placement component and the pipe to be inspected are detachably and movably connected through it. The placement component is provided with a defogging mechanism on the front side, and the defogging mechanism is located on the front side of the camera device; The defogging mechanism is driven by the rotating mechanism.

[0010] Furthermore, the support assembly includes a support rod, a fixing pin, a connecting frame, and a rubber base; The lower part of each of the four ends of the cross connecting plate is provided with a connecting frame, and all four connecting frames are fixedly connected to the fixed cylinder; Each of the four connecting frames has a first end of a support rod rotatably mounted inside it, and the upper part of the first end of each support rod is able to fit and contact the lower part of the cross connecting plate that is close to it. Each of the four support rods has a fixing pin threaded through its second end, and each of the four fixing pins has a rotatable rubber base at its bottom. Each of the four rubber bases is in detachable contact with the ground to be installed.

[0011] Furthermore, the operating mechanism includes a crank handle, a main shaft, a cam plate, a worm gear, a worm, and an L-shaped plate; The upper left part of the annular base is provided with two protruding plates, and a main shaft is rotatably inserted through the two protruding plates. The front end of the main shaft is provided with a rocker handle, which is movably positioned above the ground to be installed. A worm gear is fixedly sleeved on the middle part of the outer wall of the main shaft; The left side of the two protruding plates is provided with an L-shaped vertical plate, and the lower end of the vertical plate of the L-shaped plate is fixedly connected to the upper end of the annular base. The lower right wall of the vertical plate of the L-shaped plate is rotatably provided with the first end of the first rotating shaft, and a worm gear is fixedly sleeved on the outer wall of the first rotating shaft, and the worm gear is meshed on the worm. The first rotating shaft and the worm gear are connected through each other; The first rotating shaft drives the rotating mechanism to work by rotating.

[0012] Furthermore, the rotating mechanism includes a first bevel gear, a second bevel gear, and a telescopic guide rod; A second bevel gear is fixedly sleeved on the outer wall of the rotating cylinder, and the second bevel gear is movably disposed above the annular base; The second end of the first rotating shaft is fixedly provided with a first bevel gear, and the first bevel gear and the second bevel gear are meshed together; The chassis has two fixed ends of telescopic guide rods at the eccentric position at the lower end, and the movable ends of the two telescopic guide rods are respectively connected to the placement component.

[0013] Furthermore, the placement assembly includes a top plate, a placement platform, a hollow support rod, and an extension rod; The same top plate is movably sleeved on the outer wall of the movable end of the two telescopic guide rods. The lower end of the top plate is fixed with a placement platform by two hollow support rods. The camera device is detachably mounted on the upper end of the placement platform and is detachably mounted between the two hollow support rods. The two telescopic guide rods are respectively connected through the movable ends of the end sections to the hollow support rods adjacent to them; The left and right front ends of the placement platform are respectively provided with extension rods, and the defogging mechanism is respectively provided on the two extension rods; The lower end of the sliding rod is rotatably connected to the center of the upper end of the top plate.

[0014] Furthermore, the axial displacement guiding mechanism includes a rectangular limiting hole and a rectangular limiting rod; The upper end of the sliding rod is provided with a rectangular limiting hole; A rectangular limiting rod is provided at the lower part of the horizontal end of the L-shaped plate, and the rectangular limiting rod and the rectangular limiting hole are slidably connected.

[0015] Furthermore, the defogging mechanism includes a first spur gear, a second spur gear, a first transmission wheel, a second transmission wheel, a transmission belt, and fan blades; A second spur gear is fixedly sleeved on the outer wall of the movable end of the two telescopic guide rods, and both second spur gears are rotatably mounted on the upper end of the top plate; The upper part of the lower end of the sliding rod is fixedly sleeved with a first spur gear, which is located above the top plate. Both second spur gears are meshed with the first spur gear; First transmission wheels are fixedly sleeved on the outer walls of the movable ends of the two telescopic guide rods, and the two first transmission wheels are rotatably mounted on the bottom of the placement platform. The lower front ends of the two extension rods are respectively equipped with second transmission wheels via second rotating shafts; The two first drive wheels are respectively fitted with the same drive belt between them and the adjacent second drive wheel; The top ends of the two second rotating shafts are respectively rotatably connected to the extension rods nearby and are fixed with fan blades; The two fan blades are respectively movably mounted on the front side of the camera device.

[0016] Compared with the prior art, the present invention provides an internal inspection device for underground pipelines, which has the following advantages: Security has been significantly improved, as detailed below: By using external support components in conjunction with the ground to be installed, the operating mechanism is extended to the outside of the manhole opening, avoiding frequent movement of workers above the manhole opening and reducing the risk of workers falling into the manhole.

[0017] It is more effortless to use, as detailed below: This device avoids the need for frequent manual splicing of telescopic poles required in traditional handheld CCTV systems. It integrates the original multi-section telescopic pole into a single unit, which is lowered synchronously with the operating mechanism. This reduces the load on the user and makes it easier to use. It also avoids the problem of unstable connections caused by improper splicing or aging and damage at the joints of traditional telescopic poles, which could lead to the device falling into the underground pipeline.

[0018] Imaging stability is significantly improved, as detailed below: By slowly and smoothly lowering the camera equipment through the operating mechanism, the problem of the traditional handheld equipment swinging and potentially touching the well wall during the lowering process is solved. At the same time, the shaking caused by the personnel holding the equipment during the inspection is avoided, making the imaging more stable.

[0019] The detection range has been significantly improved, as detailed below: As the camera is slowly lowered, it rotates simultaneously under the drive of the rotating mechanism. As it is gradually lowered, the camera can record images within a 360° range around itself, avoiding the inconvenience caused by manual rotation of traditional handheld booms, and increasing the camera range while ensuring safety.

[0020] The image quality has been significantly improved, as detailed below: As the camera equipment is lowered into the pipe, the fan blades on its front side will continue to rotate, reducing the amount of fog caused by humidity and temperature differences inside the pipe that adheres to the camera lens, thus significantly improving the image quality of the camera equipment.

[0021] In addition to the objectives, features and advantages described above, the present invention has other objectives, features and advantages, which will be further described in detail below with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram illustrating the working principle of the support component of the present invention; Figure 3 This is a schematic diagram of the overall structure of the L-shaped plate of the present invention; Figure 4 This is a bottom view of the overall structure of the present invention; Figure 5 This is a schematic diagram illustrating the working principle of the defogging mechanism of the present invention; Figure 6 This is a schematic diagram of the overall structure of the component placement device of the present invention; Figure 7 This is a schematic diagram of the overall structure of the defogging mechanism of the present invention; Figure 8 This is a schematic diagram of the overall structure of the annular base of the present invention; Figure 9 This is a schematic diagram of the working state of the present invention; Figure 10 This is a schematic diagram of another working state of the present invention.

[0024] 1 is the ground to be installed, 2 is the pipe to be inspected, 3 is the support rod, 4 is the fixing pin, 5 is the L-shaped plate, 6 is the sliding rod, 7 is the rectangular limiting rod, 8 is the rotating cylinder, 9 is the annular base, 10 is the crank handle, 11 is the worm gear, 12 is the worm, 13 is the convex plate, 14 is the first bevel gear, 15 is the second bevel gear, 16 is the chassis, 17 is the connecting column, 18 is the cross connecting plate, 19 is the fixing cylinder, 20 is the connecting frame, 21 is the telescopic guide rod, 22 is the first spur gear, 23 is the second spur gear, 24 is the top plate, 25 is the placement platform, 26 is the camera equipment, 27 is the hollow support rod, 28 is the extension rod, 29 is the first transmission wheel, 30 is the transmission belt, and 31 is the fan blade; 1001 is the main axis; 2901 is the second transmission wheel. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0026] In the description of the invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 the 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 limiting the invention.

[0027] refer to Figures 1 to 10 An underground pipeline internal inspection device includes a ground surface to be installed 1, a pipeline to be inspected 2, a camera device 26, and also includes an annular base 9, a sliding rod 6, a rotating cylinder 8, a fixed cylinder 19, a chassis 16, a cross connecting plate 18, a connecting column 17, a support assembly, a placement assembly, an operating mechanism, a rotating mechanism, an axial displacement guiding mechanism, and a defogging mechanism. A cross connecting plate 18 is installed at the upper end of the fixed cylinder 19. The upper parts of the horizontal plate and the vertical plate of the cross connecting plate 18 are respectively fixedly installed with the same annular base 9 through the connecting column 17. The fixed cylinder 19, the cross connecting plate 18 and the annular base 9 are an integral part, which serves as the core of the equipment to form a skeleton and provide support for the installation of subsequent parts. An operating mechanism is installed at the upper end of the annular base 9; Support components are installed at the lower parts of the horizontal and vertical ends of the cross connecting plate 18. The support components are detachably connected to the ground 1 to be installed. The support components are used to form a detachable fixation between the support components and the ground 1 to be installed before testing, avoiding the traditional hand-held lever method, enhancing the safety of personnel operation, and also increasing the stability of the subsequent camera equipment 26 when shooting. A rotating cylinder 8 is rotatably installed inside the fixed cylinder 19. The rotating cylinder 8 and the cross connecting plate 18 are rotatably connected at the intersection of the horizontal and vertical plates. The rotating cylinder 8 and the annular base 9 are rotatably connected at the center. The rotating cylinder 8 is driven to rotate by a rotating mechanism. The rotating cylinder 8 will start to rotate under the drive of the rotating mechanism, providing the initial rotation capability for the chassis 16 described later. The chassis 16 will then transmit the rotation driving force to the placement assembly described later, enabling the placement assembly to also rotate. The rotating mechanism is driven to work by the operating mechanism; A base 16 is installed at the lower end of the rotating cylinder 8, and the base 16 is movably installed below the fixed cylinder 19; A sliding rod 6 is threaded through the inner thread of the rotating cylinder 8. The sliding rod 6 is movably connected to the base 16. An axial displacement guide mechanism is mounted on the annular base 9 and is connected to the sliding rod 6. The axial displacement guide mechanism is used to limit the rotation of the sliding rod 6 and make the sliding rod 6 slide along the axial direction of the rotating cylinder 8. The rotating cylinder 8 drives the axial displacement guide mechanism to work by rotating. During the rotation of the rotating cylinder 8, the sliding rod 6 will be driven to descend smoothly and slowly, and the placement assembly described later will also descend smoothly and slowly. A placement component is installed at the lower end of the sliding rod 6, and the placement component is rotatably installed under the chassis 16; The placement component is equipped with a camera device 26 that can be detachably installed inside. The placement component and the pipeline 2 to be inspected are detachably and movablely connected. The placement component serves as the mounting platform for the camera device 26. The camera device 26 is the imaging input end. The control panel that is configured with the camera device 26 is an external imaging output terminal, which is in the hands of the personnel located above the inspection well. Both the control panel and the camera device 26 are existing technologies and will not be described in detail here. A defogging mechanism is installed on the front side of the component placement area; the defogging mechanism is installed on the front side of the camera device 26. The defogging mechanism is driven by the rotating mechanism. While the camera device 26 slowly descends and rotates to capture images, the defogging mechanism blows air onto its own lens to remove fog, reducing the amount of water vapor adhering to the lens due to the humidity inside the pipe and the temperature difference, thereby improving the image quality.

[0028] The support assembly includes a support rod 3, a fixing pin 4, a connecting frame 20, and a rubber base; Connecting brackets 20 are installed at the lower ends of the horizontal plate and the lower ends of the vertical plate of the cross connecting plate 18, and all four connecting brackets 20 are fixedly connected to the fixing cylinder 19. The first end of the support rod 3 is rotatably installed in each of the four connecting frames 20. The upper part of the first end of each support rod 3 is in contact with the lower part of the cross connecting plate 18 that is close to it. Each of the four support rods 3 has a fixing pin 4 threaded through its second end. Each of the four fixing pins 4 has a rubber base rotatably mounted on its bottom. Each of the four rubber bases is in detachable contact with the ground 1 to be installed.

[0029] refer to Figure 9As shown, in the initial state, all four support rods 3 are folded downwards. When carrying the equipment to the top of the target inspection well, it is placed above the inspection well via the annular base 9. When the equipment is released downwards, the four support rods 3 tend to be horizontal after contacting the ground. When the four support rods 3 are completely horizontal, they are blocked by the lower wall of the cross connecting plate 18. At this time, the equipment can be placed at the inspection well without manual handling, achieving initial fixation. After adjusting the position, the four rubber bases are in contact with the ground, increasing the sliding friction between the equipment and the ground, preventing the equipment from shifting on the plane. This facilitates the stable lowering of the camera equipment 26 during subsequent operations. Since the fixing pin 4 is rotatably connected to the rubber base, when the rubber base supports the ground, the rotation of the fixing pin will not cause the rubber base to rotate, thus adjusting the equipment height. Therefore, the tilt angle of the equipment can be adjusted by rotating any fixing pin 4, giving the equipment a more diverse shooting field of view.

[0030] The operating mechanism includes a crank handle 10, a main shaft 1001, a convex plate 13, a worm gear 11, a worm 12, and an L-shaped plate 5; Two protruding plates 13 are respectively installed on the upper left side of the ring base 9. A main shaft 1001 is rotatably installed inside the two protruding plates 13. A rocker handle 10 is installed at the front end of the main shaft 1001. The rocker handle 10 is movably installed above the ground 1 to be installed. A worm gear 12 is fixedly installed in the middle of the outer wall of the main spindle 1001; The vertical plate of the L-shaped plate 5 is installed on the left side of the two protruding plates 13, and the lower end of the vertical plate of the L-shaped plate 5 is fixedly connected to the upper end of the annular base 9. The first end of the first rotating shaft is rotatably installed on the lower right wall of the vertical plate of the L-shaped plate 5. A worm gear 11 is fixedly installed on the outer wall of the first rotating shaft, and the worm gear 11 is meshed on the worm 12. The first rotating shaft and the worm gear 11 are connected through each other; The first rotating shaft drives the rotating mechanism to work, and the equipment, after being supported by the support components, ... Figure 2In the state shown, the crank handle 10 is located away from the inspection well opening, allowing for safe operation. The crank handle 10 rotates, causing the main shaft 1001 to rotate. The main shaft 1001 then rotates the worm gear 12, which in turn rotates the worm wheel 11. The worm wheel 11 then rotates the first rotating shaft, which in turn drives the rotating mechanism (described later) to rotate the rotating cylinder 8. Because of the cooperation between the worm wheel 11 and the worm gear 12, the worm wheel 11 will not rotate under external forces other than those applied to the worm gear 12 due to its self-locking property. This not only improves transmission stability but also enables control of the camera device 26 while saving effort. It should be noted that, as a preferred option, the crank handle 10 and the main shaft 1001 can also be replaced with a rotating shaft controlled by an external motor. The button for controlling the start and stop of the external motor can be integrated into the external control panel for convenient use.

[0031] The rotating mechanism includes a first bevel gear 14, a second bevel gear 15, and a telescopic guide rod 21; A second bevel gear 15 is fixedly installed on the outer wall of the rotating cylinder 8, and the second bevel gear 15 is movably installed above the annular base 9; A first bevel gear 14 is fixedly installed at the second end of the first rotating shaft, and the first bevel gear 14 and the second bevel gear 15 are meshed together. Two telescopic guide rods 21 are rotatably mounted at the eccentric position at the lower end of the chassis 16. The movable ends of the two telescopic guide rods 21 are movably connected to the placement component. The first rotating shaft rotates with the worm gear 11 and synchronously drives the first bevel gear 14 fixedly mounted thereto, causing the first bevel gear 14 to start rotating. The first bevel gear 14 drives the second bevel gear 15 meshing with it. The second bevel gear 15 drives the rotating cylinder 8 fixedly mounted thereto to start rotating. During the rotation of the rotating cylinder 8, the chassis 16 rotates, providing rotational capability for the placement component described later.

[0032] The placement components include a top plate 24, a placement platform 25, a hollow support rod 27, and an extension rod 28; The same top plate 24 is movably installed on the outer wall of the movable end of the two telescopic guide rods 21. The lower end of the top plate 24 is fixedly installed with a placement platform 25 by two hollow support rods 27. The camera device 26 is detachably installed on the upper end of the placement platform 25 and is detachably installed between the two hollow support rods 27. The movable ends of the two telescopic guide rods 21 are respectively connected to the hollow support rod 27 that is close to them; Extension rods 28 are installed on the front ends of the left and right sides of the placement platform 25, and the defogging mechanism is installed on the two extension rods 28 respectively. The lower end of the sliding rod 6 is rotatably connected to the upper center of the top plate 24. The placement platform 25 is used to support the camera device 26. The distance between the top plate 24 and the placement platform 25 is adapted to the height of the camera device 26. As the two telescopic guide rods 21 rotate with the chassis 16, they pass through the hollow support rod 27, causing both the top plate 24 and the placement platform 25 to rotate around the sliding rod 6. The camera device 26 located between them can also rotate at this time. Since the sliding rod 6 can also slide up and down under the drive of the axial displacement guide mechanism described later, the camera device 26 placed between it can rotate while ensuring up and down movement. It should be noted that each section of the telescopic guide rod 21 has a guide rail and guide groove to cooperate with it. Each sub-guide rod in the telescopic guide rod 21 can only slide relative to each other and will not rotate. The lens of the camera device 26 can cover its own 360° range of scenery during the rotation process. The lens of the camera device 26 also integrates a lighting lamp on the upper side to provide a stable light source for shooting.

[0033] The axial displacement guiding mechanism includes a rectangular limiting hole and a rectangular limiting rod 7; A rectangular limiting hole is installed at the upper end of the sliding rod 6; A rectangular limiting rod 7 is installed at the lower part of the horizontal end of the L-shaped plate 5, and the rectangular limiting rod 7 and the rectangular limiting hole are slidably connected. The sliding rod 6 and the rotating cylinder 8 are connected by a thread. Originally, when the rotating cylinder 8 rotates, it will drive the internal sliding rod 6 to rotate synchronously. However, since the rotational capacity of the sliding rod 6 is limited by the rectangular limiting rod 7, and the rectangular limiting rod 7 is fixed by the L-shaped plate 5 and forms a fixed whole with the annular base 9, when the rotating cylinder 8 rotates, the sliding rod 6 can only slide smoothly due to the thread connection, which in turn drives the top plate 24 to slide smoothly.

[0034] The defogging mechanism includes a first spur gear 22, a second spur gear 23, a first transmission wheel 29, a second transmission wheel 2901, a transmission belt 30, and a fan blade 31; Two second spur gears 23 are fixedly installed on the outer walls of the movable ends of the two telescopic guide rods 21, and both second spur gears 23 are rotatably installed on the upper end of the top plate 24. A first spur gear 22 is fixedly installed on the upper part of the lower end of the sliding rod 6, and the first spur gear 22 is installed above the top plate 24; Both second spur gears 23 are meshed with the first spur gear 22; Two first transmission wheels 29 are fixedly installed on the outer walls of the movable ends of the two telescopic guide rods 21, and the two first transmission wheels 29 are rotatably installed on the bottom of the placement platform 25. The lower front ends of the two extension rods 28 are respectively equipped with second transmission wheels 2901 via second rotating shafts; The same transmission belt 30 is fitted between the two first transmission wheels 29 and the adjacent second transmission wheel 2901; The top ends of the two second rotating shafts are respectively rotated through the extension rod 28 close to them and fixed with fan blades 31; The two fan blades 31 are respectively movably mounted on the front side of the camera device 26, for reference. Figure 5 During the lowering of the platform 25 and top plate 24 by the sliding rod 6, the chassis 16 rotates synchronously with the rotating cylinder 8. Therefore, the movable ends of the two telescopic guide rods 21, along with their fixed ends, cause the platform 25 and top plate 24 to rotate synchronously. During the rotation of the top plate 24, the two second spur gears 23 revolve around the sliding rod 6 and are always meshed with the first spur gear 22. Since the first spur gear 22 and the sliding rod 6 do not rotate, the two second spur gears 23 can begin to rotate on their own axis. This rotation causes the movable ends of the two telescopic guide rods 21 to also begin to rotate. During this rotation, the movable ends of the two telescopic guide rods 21 drive their respective fixed ends to rotate at the lower end of the chassis 16, and simultaneously drive the first transmission wheel 29, which is coaxially fixed to the movable ends, to begin rotating. During this rotation, the two first transmission wheels 29 respectively drive the adjacent second transmission wheels 290 via the matching transmission belt 30. 1. Upon starting to rotate, the two second transmission wheels 2901 drive the fan blades 31, which are coaxially mounted with them, to rotate. During the rotation of the fan blades 31, the airflow speed in front of the lens of the camera device 26 is accelerated, thereby reducing the amount of water vapor adhering to the lens surface and making the image clearer. It should be noted that the outer walls of the movable ends of the two telescopic guide rods 21 are respectively integrated with the second spur gear 23 and the first transmission wheel 29. Therefore, during the process of the sliding rod 6 moving up and down to drive the placement platform 25 and the top plate 24 to move up and down, the placement platform 25 is supported by the two first transmission wheels 29. Therefore, in order to reduce the sliding friction between the bottom of the placement platform 25 and the top wall of the first transmission wheel 29, a thrust bearing can be sleeved on the outer wall of the movable end of the telescopic guide rod 21 between the first transmission wheel 29 and the placement platform 25. This allows the first transmission wheel 29 to rotate better without affecting its ability to support the placement platform 25.

[0035] Implementation method of the present invention: When the equipment is placed and in its initial state, such as Figure 9In the state shown, carry the equipment to the inspection wellhead above the pipeline 2 to be inspected. Initially, place the placement component and camera equipment 26 into the inspection wellhead. Then, make the outer ends of the four support rods 3 contact the ground 1 to be installed. Then, slowly lower the annular base 9 so that the four support rods 3 are fully extended and at an angle horizontal to the ground 1 to be installed. At this time, stop manually holding the equipment. The equipment will fall off naturally due to gravity and make the four support rods 3 completely horizontal and limited by the cross connecting plate 18. The equipment is initially fixed. Fine-tune the device, aligning the sliding rod 6 with the manhole opening as much as possible. After adjustment, attach the rubber base at the lower end of the four fixing pins to the ground surface 1 where it will be installed. At this point, the device should function as expected. Figure 10 The diagram shown illustrates the state in which the surface to be installed (1) aligns with the surrounding environment. Figure 1 As shown; The lowering assembly is activated by cranking the handle 10, which in turn rotates the rotating cylinder 8. The rotating cylinder 8 rotates the chassis 16, which in turn rotates the two telescopic guide rods 21 around the sliding rod 6. The sliding rod 6, which is threaded through the rotating cylinder 8, begins to descend. The sliding rod 6 carries the first spur gear 22, which is fixedly installed therewith, and the top plate 24, which is rotatably installed therewith, and descends synchronously. During the rotation, the top plate 24 drives the two second spur gears 23 to revolve synchronously around the sliding rod 6, and begins to rotate on its own axis in cooperation with the non-rotating first spur gear 22. This, in turn, drives the two fan blades 31 to rotate as the camera equipment 26 is lowered through the two first transmission wheels 29 and the two second transmission wheels 2901, thus blowing air to defog the lens of the camera equipment 26.

[0036] This equipment utilizes an external support assembly that integrates with the ground to extend the operating mechanism to the outside of the manhole opening. This avoids frequent movement of personnel above the manhole, reducing the risk of falls. Furthermore, it eliminates the need for frequent manual splicing of telescopic booms required in traditional handheld CCTV systems. Instead, it integrates multiple sections of the boom into a single unit, lowering synchronously with the operating mechanism. This reduces the load on the operator, making it more labor-saving. It also avoids the instability caused by improper splicing or aging / damaged connections, which could lead to the equipment falling into the manhole. The operating mechanism slowly and smoothly lowers the camera, eliminating the possibility of it swaying and hitting the manhole wall during lowering, as is common with traditional handheld devices. It also avoids shaking caused by the operator's hand, resulting in more stable imaging. Simultaneously, the camera rotates under the drive of a rotating mechanism as it slowly lowers, recording images within a 360° radius around itself. This avoids the inconvenience of manual rotation of traditional handheld booms, increasing the camera range while ensuring safety.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An underground pipeline internal inspection device, comprising a ground surface to be installed (1), a pipeline to be inspected (2), and a camera device (26), characterized in that: It also includes an annular base (9), a sliding rod (6), a rotating cylinder (8), a fixed cylinder (19), a chassis (16), a cross connecting plate (18), a connecting column (17), a support assembly, a placement assembly, an operating mechanism, a rotating mechanism, an axial displacement guide mechanism, and a demisting mechanism; The upper end of the fixed cylinder (19) is provided with a cross connecting plate (18), and the upper parts of the four ends of the cross connecting plate (18) are respectively fixed with the same annular base (9) through connecting columns (17). An operating mechanism is provided at the upper end of the annular base (9); The lower part of each of the four ends of the cross connecting plate (18) is provided with a support component, and the support component is detachably connected to the ground (1) to be installed. The fixed cylinder (19) is rotatably connected to the rotating cylinder (8), the rotating cylinder (8) and the cross connecting plate (18) are rotatably connected to each other in the middle, the rotating cylinder (8) and the annular base (9) are rotatably connected to each other in the center, and the rotating cylinder (8) is driven to rotate by a rotating mechanism. The rotating mechanism is driven by the operating mechanism. The lower end of the rotating cylinder (8) is provided with a base plate (16), which is movably disposed below the fixed cylinder (19); The rotating cylinder (8) has a sliding rod (6) threaded through it. The sliding rod (6) and the chassis (16) are movably connected through each other. The axial displacement guide mechanism is disposed on the annular base (9). The axial displacement guide mechanism is connected to the sliding rod (6). The axial displacement guide mechanism is used to restrict the rotation of the sliding rod (6) and make the sliding rod (6) slide along the axial direction of the rotating cylinder (8). The rotating cylinder (8) drives the axial displacement guide mechanism to work by rotating. The lower end of the sliding rod (6) is provided with a placement component, which is rotatably located below the chassis (16); The placement component is detachably equipped with a camera device (26), and the placement component and the pipeline to be inspected (2) are detachably and movably connected through each other; The front side of the placement component is provided with a defogging mechanism, which is located on the front side of the camera device (26); The defogging mechanism is driven by the rotating mechanism.

2. The underground pipeline internal inspection equipment according to claim 1, characterized in that: The support assembly includes a support rod (3), a fixing pin (4), a connecting frame (20), and a rubber base; The four lower ends of the cross connecting plate (18) are respectively provided with connecting frames (20), and the four connecting frames (20) are fixedly connected to the fixed cylinder (19); Each of the four connecting frames (20) has a first end of a support rod (3) rotatably mounted inside it. The upper part of the first end of each support rod (3) is in contact with the lower part of the cross connecting plate (18) that is close to it. Each of the four support rods (3) has a fixed pin (4) threaded through its second end. Each of the four fixed pins (4) has a rubber base rotatably mounted on its bottom. Each of the four rubber bases is in detachable contact with the ground (1) to be installed.

3. The underground pipeline internal inspection equipment according to claim 1, characterized in that: The operating mechanism includes a crank (10), a main shaft (1001), a convex plate (13), a worm gear (11), a worm (12), and an L-shaped plate (5). The upper left part of the ring base (9) is provided with two protruding plates (13), and a main shaft (1001) is rotatably inserted inside the two protruding plates (13). A rocker handle (10) is provided at the front end of the main shaft (1001), and the rocker handle (10) is movably positioned above the ground (1) to be installed. A worm gear (12) is fixedly sleeved on the middle of the outer wall of the main shaft (1001). The left side of the two protruding plates (13) is provided with the vertical plate of the L-shaped plate (5), and the lower end of the vertical plate of the L-shaped plate (5) is fixedly connected to the upper end of the annular base (9). The lower right wall of the vertical plate of the L-shaped plate (5) is provided with the first end of the first rotating shaft, and the outer wall of the first rotating shaft is fixedly sleeved with a worm gear (11), which is engaged with the worm (12). The first rotating shaft and the worm gear (11) are connected through each other; The first rotating shaft drives the rotating mechanism to work by rotating.

4. The underground pipeline internal detection equipment according to claim 3, characterized in that: The rotating mechanism includes a first bevel gear (14), a second bevel gear (15), and a telescopic guide rod (21). A second bevel gear (15) is fixedly sleeved on the outer wall of the rotating cylinder (8), and the second bevel gear (15) is movably disposed above the annular base (9); The second end of the first rotating shaft is fixedly provided with a first bevel gear (14), and the first bevel gear (14) and the second bevel gear (15) are meshed together; The chassis (16) has two fixed ends of telescopic guide rods (21) rotatably mounted at the eccentric position at the lower end. The movable ends of the two telescopic guide rods (21) are movably connected to the placement assembly.

5. The underground pipeline internal inspection equipment according to claim 4, characterized in that: The placement assembly includes a top plate (24), a placement platform (25), a hollow support rod (27), and an extension rod (28). The same top plate (24) is movably sleeved on the outer wall of the movable end of the two telescopic guide rods (21). The lower end of the top plate (24) is fixed with a placement platform (25) by two hollow support rods (27). The camera device (26) is detachably installed on the upper end of the placement platform (25). The camera device (26) is detachably installed between the two hollow support rods (27). The two telescopic guide rods (21) are respectively connected to the hollow support rod (27) that is close to them; The left and right front ends of the placement platform (25) are respectively provided with extension rods (28), and the defogging mechanism is provided on the two extension rods (28); The lower end of the sliding rod (6) is rotatably connected to the upper center of the top plate (24).

6. The underground pipeline internal inspection equipment according to claim 5, characterized in that: The axial displacement guiding mechanism includes a rectangular limiting hole and a rectangular limiting rod (7); The upper end of the sliding rod (6) is provided with a rectangular limiting hole; The lower part of the horizontal end of the L-shaped plate (5) is provided with a rectangular limiting rod (7), and the rectangular limiting rod (7) and the rectangular limiting hole are slidably connected.

7. The underground pipeline internal inspection equipment according to claim 5, characterized in that: The defogging mechanism includes a first spur gear (22), a second spur gear (23), a first transmission wheel (29), a second transmission wheel (2901), a transmission belt (30), and a fan blade (31). The outer walls of the movable ends of the two telescopic guide rods (21) are respectively fixedly fitted with second spur gears (23), and the two second spur gears (23) are rotatably mounted on the upper end of the top plate (24); The upper part of the lower end of the sliding rod (6) is fixedly sleeved with a first spur gear (22), which is located above the top plate (24); Both of the second spur gears (23) are meshed with the first spur gear (22); The outer walls of the movable ends of the two telescopic guide rods (21) are respectively fixedly fitted with first transmission wheels (29), and the two first transmission wheels (29) are respectively rotatably mounted on the bottom of the placement platform (25); The lower front ends of the two extension rods (28) are respectively provided with second transmission wheels (2901) via second rotating shafts. The two first drive wheels (29) are respectively fitted with the same drive belt (30) between them and the adjacent second drive wheel (2901). The top ends of the two second rotating shafts are respectively rotated through the extension rod (28) which is close to them and fixed with fan blades (31). The two fan blades (31) are respectively movably disposed on the front side of the camera device (26).

Images