Borehole television probe device

Abstract

This invention relates to the field of borehole detection technology and discloses a borehole television detection device. The device includes a cable and a detection mechanism connected to its end. The detection mechanism comprises a protective cylinder, a transparent cover, a camera unit, a cleaning component, a lifting component, a transmission component, and a drive mechanism. The drive mechanism drives the camera unit to rotate and scan around the axis of the protective cylinder. Its power is selectively transmitted to the lifting component via the transmission component. When the drive mechanism rotates in the reverse direction, it drives a reciprocating screw to rotate via a ratchet and pawl mechanism, driving the cleaning component to reciprocate along the axial direction of the protective cylinder. Simultaneously, the cleaning component rotates around the axis of the protective cylinder under the cooperation of a spiral guide groove and a guide rod, performing spiral wiping and cleaning of the outer wall of the transparent cover. After cleaning, the cleaning component automatically rises and resets. This invention enables online automatic cleaning of the transparent cover without the detection mechanism being removed from the borehole, significantly improving the efficiency and imaging reliability of borehole detection operations.

Description

Technical Field

[0001] This invention relates to the field of borehole detection technology, and more specifically to a borehole television detection device. Background Technology

[0002] Borehole television is a key device used in engineering geology, mineral exploration, and other fields to obtain high-definition video or image data of borehole walls. Existing borehole television detection devices typically include a tripod on the ground, a winch mechanism, a control system, and a probe lowered into the borehole via a cable. The probe generally includes a protective casing, a transparent cover at the bottom, and a camera unit and lighting unit housed within the cover. During operation, the probe descends or rises within the borehole, continuously capturing images of the borehole wall through a rotating or panoramic lens on the camera unit.

[0003] However, in practical applications, especially in environments such as hydrogeological exploration, pile foundation testing, or mining drilling, boreholes are often filled with turbid mud, rock cuttings, or other suspended matter. During probe lowering, these contaminants easily adhere to the outer surface of the transparent cover, quickly obscuring the lens and resulting in blurry images that cannot effectively distinguish the lithology, fractures, or structures of the borehole wall. When contamination occurs, operators have to interrupt the exploration, manually clean the entire probe outside the borehole, and then lower it again. For deep boreholes, this process of raising, cleaning, and lowering is extremely time-consuming, severely impacting exploration efficiency, and repeated raising and lowering increases the risk of equipment wear and drill jamming. In addition, manual cleaning may also scratch the surface of the transparent cover.

[0004] Therefore, there is an urgent need for a borehole television detection device that can effectively clean the transparent cover online without removing the probe. Summary of the Invention

[0005] The present invention provides a borehole television detection device to solve the above-mentioned problems.

[0006] This invention provides a borehole television detection device, comprising: Tripod; The frame is located on one side of the tripod; A winding device is installed at the top of the frame, and the head end of the cable is connected to the winding device; A cable, one end of which is wound around the winder, and the other end of which is connected to a detection mechanism; A guide assembly located on the top of the tripod is used to guide the cable when the detection mechanism is raised or lowered; the guide assembly includes a pulley frame fixedly installed on the top of the tripod and a plurality of guide pulleys rotatably connected to the pulley frame; The detection mechanism includes: A protective sleeve connected to the cable; A transparent cover is installed at the bottom of the protective cylinder; The camera unit, located inside the transparent cover, is used to capture images of the inner wall of the borehole. Cleaning components are located on the outside of the transparent cover; A lifting component located on the outside of the protective cylinder is used to drive the cleaning component to rise and fall. A transmission component located on the outside of the protective cylinder is used to drive the lifting component; A drive mechanism located inside the protective cylinder is used to drive the camera unit to rotate around the axis of the protective cylinder; Hollow suspension pipe for suspending and installing the camera unit; The circuit board assembly, located on the top inner side of the protective cylinder and electrically connected to the cable, is used to supply power to the drive mechanism and the camera unit.

[0007] This invention achieves online, automatic lens cleaning by setting up a self-cleaning system that links a drive mechanism, transmission components, lifting components, and a cleaning component. Inside the detection mechanism, the drive mechanism not only drives the camera unit to rotate for scanning, but its power can also be selectively transmitted to the lifting component (including a reciprocating screw) through the transmission components (including bevel gear pairs and ratchet-pawl mechanisms). The lifting component drives the cleaning component to rise and fall, while the cleaning component, through the cooperation of its guide rod and the spiral guide groove on the outer wall of the protective cylinder, rotates during rising and falling, thereby performing a spiral wiping cleaning of the outer wall of the transparent cover. After cleaning, the cleaning component automatically returns to its high position under the action of the reciprocating screw. This design solves the problem of lens cover contamination leading to blurred images when traditional borehole television operates in murky or sediment-containing boreholes. It eliminates the need to remove the entire device from the borehole for manual cleaning, significantly reducing the number and duration of interruptions in detection, greatly improving the efficiency and continuity of deep-hole and long-distance detection operations, and ensuring the clarity and integrity of image data.

[0008] In one optional embodiment, the lifting component includes two fixed blocks fixed to the side wall of the protective cylinder, a reciprocating screw rotatably connected between the two fixed blocks, and a transmission slider connected to the outer wall of the reciprocating screw. When the reciprocating screw rotates continuously in one direction, the transmission slider can automatically reciprocate linearly along its outer wall. A fixing plate is fixedly connected to the side wall of the protective cylinder, and a guide shaft is fixedly connected to the bottom end of the fixing plate. A guide slider is slidably connected to the outer wall of the guide shaft.

[0009] In one alternative embodiment, a connecting rod is fixedly connected to both the guide slider and the transmission slider, and a lifting ring is fixedly connected to the bottom end of both connecting rods.

[0010] In one optional embodiment, the transmission component includes a lifting block fixed to the side wall of the protective cylinder, a rotating column rotatably connected to the lifting block, a first bevel gear fixedly sleeved on the outer wall of the rotating column, and a second bevel gear meshing with one side of the first bevel gear.

[0011] In one optional embodiment, a ratchet is fixedly connected to the bottom end of the rotating column, and a rotating frame is rotatably connected to the upper side of the fixed block. The rotating frame is coaxially fixedly connected to the reciprocating screw.

[0012] The automatic and reliable switching between detection and cleaning modes is achieved through the coordination of a ratchet and pawl mechanism with the motor's rotation direction. The ratchet and pawl mechanism are integrated into the transmission components. When the drive motor rotates forward (detection mode), the ratchet idles, power is not transmitted to the lifting component, and the cleaning component remains stationary at a high position, not obstructing detection. When cleaning is required, the control motor reverses, the ratchet pushes the pawl, thereby transmitting power to the reciprocating screw, driving the cleaning component to descend and rotate for cleaning. After cleaning, the motor stops, and the cleaning component automatically rises and resets under the drive of the reciprocating screw. This design utilizes a single drive source (motor) and a clever unidirectional transmission mechanism, achieving a fully automatic "descending for cleaning - rising and resetting" cleaning cycle with a single button press simply by changing the motor's rotation direction. The compact structure and simple, reliable control eliminate the need for additional drive motors or complex control programs in narrow-aperture detection mechanisms, reducing failure rates and manufacturing costs.

[0013] In one optional embodiment, a plurality of rotating shafts are fixedly connected to the top of the rotating frame, and ratchet teeth that cooperate with the ratchet are rotatably sleeved on the outer wall of the rotating shafts, and a torsion spring is connected between the ratchet teeth and the rotating shafts.

[0014] In one optional embodiment, the cleaning component includes a rotating seat rotatably connected to the inner side of the hanging ring, an outer ring disposed below the rotating seat, cleaning brushes for cleaning the transparent cover distributed on the inner side of the outer ring, and a plurality of hanging rods fixedly connected between the rotating seat and the outer ring.

[0015] In one optional embodiment, the outer wall of the protective cylinder is provided with a spiral guide groove, and the inner wall of the rotating seat is fixedly connected with a plurality of guide rods that cooperate with the spiral guide groove.

[0016] In one optional embodiment, the drive mechanism includes a conductive slip ring and a motor mounted on the bottom of the circuit board assembly. A first gear is fixedly connected to the end of the motor output shaft, and a second gear that meshes with the first gear is fixedly sleeved on the movable slip ring of the conductive slip ring. The bottom end of the movable slip ring of the conductive slip ring is fixedly connected to the top end of the hollow hanging tube.

[0017] In one optional embodiment, a worm gear is fixedly sleeved on the outer wall of the hollow pipe, a worm wheel is meshed with one side of the worm gear, and a rotating rod is fixedly connected to the outer wall of the worm wheel. The rotating rod rotatably passes through the outer wall of the protective cylinder and is fixedly connected to the second bevel gear. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the planar structure of a borehole television detection device according to the present invention; Figure 2 This is a three-dimensional structural diagram of the detection mechanism of the present invention; Figure 3 This is a partial cross-sectional view of the detection mechanism of the present invention; Figure 4 This is a schematic diagram of the structural composition of the lifting component of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Rack; 2. Winding device; 3. Guide assembly; 31. Pulley frame; 32. Guide pulley; 4. Tripod; 5. Cables; 6. Detection mechanism; 61. Protective cylinder; 611. Spiral guide groove; 62. Cleaning component; 621. Outer ring; 622. Cleaning brush; 623. Hanging rod; 624. Rotary seat; 625. Guide rod; 63. Camera unit; 64. Transparent cover; 65. Lifting component; 651. Transmission slider; 652. Connecting rod; 653. Reciprocating screw; 654. Fixing block; 655. Lifting ring; 656. Guide shaft; 657. Guide slider; 658. Fixing plate; 66. Transmission components; 661. Lifting block; 662. Rotating column; 663. First bevel gear; 664. Second bevel gear; 665. Ratchet; 666. Ratchet tooth; 667. Rotating shaft; 668. Torsion spring; 669. Rotating frame; 67. Drive mechanism; 671. Motor; 672. First gear; 673. Second gear; 674. Conductive slip ring; 675. Rotating rod; 676. Worm gear; 677. Worm; 68. Circuit board assembly; 69. Hollow lifting pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0023] According to an embodiment of the present invention, a borehole television detection device is provided, including a cable 5 and a detection mechanism 6, the detection mechanism 6 being connected to the end of the cable 5. The detection mechanism 6 includes a protective cylinder 61 connected to the cable 5, a transparent cover 64 disposed at the bottom of the protective cylinder 61, a camera unit 63 disposed inside the transparent cover 64, a cleaning component 62 disposed outside the transparent cover 64, a lifting component 65 disposed outside the protective cylinder 61, a transmission component 66 disposed outside the protective cylinder 61, a drive mechanism 67 disposed inside the protective cylinder 61, a hollow hanging tube 69 for suspending the camera unit 63, and a circuit board assembly 68 disposed at the top inside the protective cylinder 61 and electrically connected to the cable 5. The camera unit 63 is used to capture images of the borehole wall, the lifting component 65 is used to drive the cleaning component 62 to rise and fall, the transmission component 66 is used to drive the lifting component 65, the drive mechanism 67 is used to drive the camera unit 63 to rotate around the axis of the protective cylinder 61, and the circuit board assembly 68 is used to supply power to the drive mechanism 67 and the camera unit 63.

[0024] In use, the drive mechanism 67 is activated, and the resulting rotational power is primarily used to drive the camera unit 63 to rotate continuously around the axis of the protective cylinder 61. The camera unit 63 is suspended and installed via a hollow hanging pipe 69. Simultaneously with rotation, the reel 2 continuously and slowly lowers the cable 5, allowing the rotating camera unit 63 to descend along the borehole axis, thereby forming a continuous, spiral-like video scan and recording of the borehole's inner wall without blind spots.

[0025] In this embodiment, while driving the camera unit 63 to rotate, a portion of the power of the drive mechanism 67 is transmitted through the transmission component 66. The transmission component 66 converts this rotational motion into a motion suitable for driving the lifting component 65. When water or rock debris in the borehole contaminates the outer surface of the transparent cover 64 at the bottom of the protective cylinder 61, causing the camera unit 63 to produce blurry images, a cleaning procedure can be initiated. By controlling commands such as changing the rotation state of the drive mechanism 67, the transmission component 66 outputs the power to drive the lifting component 65.

[0026] In this embodiment, the lifting component 65 starts working after receiving power, driving the cleaning component 62 to move up and down along the outside of the protective cylinder 61. During the descent, the cleaning component 62 scrapes or brushes the outer surface of the transparent cover 64 to remove adhering substances. Since the lifting component 65 is designed to have an automatic reciprocating function (e.g., using a reciprocating screw 653 structure), the cleaning component 62 will automatically rise and return to its initial retracted position after completing one descent cleaning cycle, thereby avoiding obstructing the detection field of the camera unit 63.

[0027] In one embodiment, the borehole television detection device further includes a tripod 4, a frame 1 disposed on one side of the tripod 4, and a winder 2 mounted on the upper end of the frame 1, with the head end of the cable 5 connected to the winder 2. A guide assembly 3 is provided on the top of the tripod 4 for guiding the cable 5 when the detection mechanism 6 is raised and lowered; the guide assembly 3 includes a pulley frame 31 fixedly mounted on the top of the tripod 4 and a plurality of guide pulleys 32 rotatably connected to the pulley frame 31.

[0028] In one embodiment, the lifting component 65 includes two fixed blocks 654 fixed to the side wall of the protective cylinder 61. A reciprocating screw 653 is rotatably connected between the two fixed blocks 654. A transmission slider 651 is drivenly connected to the outer wall of the reciprocating screw 653. When the reciprocating screw 653 rotates continuously in one direction, the transmission slider 651 can automatically reciprocate linearly along its outer wall. A fixed plate 658 is fixed to the side wall of the protective cylinder 61. A guide shaft 656 is fixed to the bottom end of the fixed plate 658. A guide slider 657 is slidably connected to the outer wall of the guide shaft 656.

[0029] When the reciprocating screw 653 rotates continuously in one direction around its own axis under the drive of external force, the two threaded grooves with opposite directions and connected end to end by the reversing groove on its outer wall will engage with the drive pin or ball inside the transmission slider 651 in a spiral engagement: the transmission slider 651 in one of the threaded grooves moves linearly to one end along the screw axis under the push of the helix angle; when the transmission slider 651 reaches the reversing groove at that end, the drive pin automatically slides into the other reverse threaded groove, thereby causing the transmission slider 651 to move in the opposite direction without changing the rotation direction of the screw. This cycle realizes automatic reciprocating linear motion under unidirectional rotation. Meanwhile, the guide shaft 656 fixed to the side wall of the protective cylinder 61 and the guide slider 657 slidably sleeved on it together form an auxiliary guide pair. The guide slider 657 is connected to the transmission slider 651 through the connecting rod 652, which not only restricts the transmission slider 651 to only move axially and prevents it from rotating circumferentially with the lead screw, but also ensures the smooth movement of the entire lifting component 65 and avoids off-center loading and jamming caused by the weight of the cleaning component 62 or the fluid resistance in the hole.

[0030] In one embodiment, a connecting rod 652 is fixedly connected to both the guide slider 657 and the transmission slider 651, and a lifting ring 655 is fixedly connected to the bottom end of both connecting rods 652.

[0031] When the reciprocating screw 653 rotates and drives the transmission slider 651 to reciprocate axially, the first connecting rod 652 fixed to the transmission slider 651 moves synchronously. At the same time, since the guide slider 657 is slidably sleeved on the guide shaft 656 and connected to the lifting ring 655 through the second connecting rod 652, and the lifting ring 655 rigidly connects the bottom ends of the two connecting rods 652 into one piece, the guide slider 657 is forced to maintain the same displacement as the transmission slider 651 under the constraint of the lifting ring 655.

[0032] In one embodiment, the transmission component 66 includes a lifting block 661 fixed to the side wall of the protective cylinder 61, a rotating column 662 rotatably connected to the lifting block 661, a first bevel gear 663 fixedly sleeved on the outer wall of the rotating column 662, and a second bevel gear 664 meshing with one side of the first bevel gear 663.

[0033] The lifting block 661 is fixed to the side wall of the protective cylinder 61, serving as a rotating support base for the rotating column 662. The rotating column 662 is rotatably connected to the lifting block 661, and a first bevel gear 663 and a second bevel gear 664 are fixedly sleeved on its outer wall, meshing with each other to form a right-angle transmission pair with perpendicular axes. When the second bevel gear 664 is driven to rotate by external power (such as the worm gear from the drive mechanism 67), its teeth push the first bevel gear 663 to rotate around the axis of the rotating column 662, thereby changing the power transmission direction from horizontal (or the original transmission direction) to vertical downward output along the axial direction of the rotating column 662.

[0034] In one embodiment, a ratchet 665 is fixedly connected to the bottom end of the rotating column 662, and a rotating frame 669 is rotatably connected to the upper side of the fixing block 654. The rotating frame 669 is coaxially fixedly connected to the reciprocating screw 653.

[0035] The ratchet 665 at the bottom of the rotating column 662 and the rotating frame 669 rotatably connected to the upper side of the fixed block 654 form a one-way transmission connection, and the rotating frame 669 is coaxially fixed to the reciprocating screw 653. When the rotating column 662 rotates driven by the second bevel gear 664, the ratchet 665 rotates accordingly. If the rotation direction of the ratchet 665 is consistent with the locking direction of the pawl on the rotating frame 669, the ratchet 665 pushes the pawl to drive the rotating frame 669 to rotate synchronously, thereby driving the reciprocating screw 653 to rotate coaxially. If the rotation direction of the ratchet 665 is opposite, the back of the teeth of the ratchet 665 slides on the pawl, and the rotating frame 669 and the reciprocating screw 653 remain stationary. Through this structure, power is transmitted to the reciprocating screw 653 only when the rotating column 662 rotates in a specific direction, thereby achieving selective control of the lifting action of the cleaning mechanism and avoiding accidental movement of the cleaning component 62 in the detection mode.

[0036] In one embodiment, a plurality of rotating shafts 667 are fixedly connected to the top of the rotating frame 669. The outer wall of the rotating shaft 667 is rotatably sleeved with ratchet teeth 666 that cooperate with ratchet 665. A torsion spring 668 is connected between the ratchet teeth 666 and the rotating shaft 667.

[0037] Several rotating shafts 667 are fixedly connected to the top of the rotating frame 669 along the circumferential direction. Each rotating shaft 667 is rotatably fitted with a ratchet 666. Under the elastic bias of the torsion spring 668, the ratchet 666 always tends to keep in contact with the tooth groove of the ratchet 665. When the ratchet 665 rotates in a certain direction with the rotating column 662, the tooth surface of the ratchet 665 pushes the ratchet 666 to swing backward around the rotating shaft 667, compressing the torsion spring 668, so that the ratchet 665 can smoothly slide past the ratchet 666 without driving the rotating frame 669 to rotate, realizing unidirectional free rotation. When the ratchet 665 rotates in the opposite direction, the ratchet 666 is engaged in the tooth groove of the ratchet 665 under the action of the restoring force of the torsion spring 668. The ratchet 665 drives the rotating shaft 667 and the rotating frame 669 to rotate synchronously through the ratchet 666, thereby transmitting power to the reciprocating screw 653 fixed to the rotating frame 669. The pawl assembly and ratchet 665 together form a reliable one-way clutch that can automatically switch the power on and off according to the rotation direction of the drive mechanism 67. At the same time, the multiple ratchet teeth 666 and the rotating shaft 667 are evenly distributed to improve the load-bearing capacity and transmission stability.

[0038] In one embodiment, the cleaning component 62 includes a rotating seat 624 rotatably connected to the inner side of the hanging ring 655, an outer ring 621 is provided below the rotating seat 624, and cleaning brushes 622 for cleaning the transparent cover 64 are distributed on the inner side of the outer ring 621. A plurality of hanging rods 623 are fixedly connected between the rotating seat 624 and the outer ring 621.

[0039] The rotating base 624 is rotatably connected to the inner side of the lifting ring 655, allowing the entire cleaning component 62 to rotate freely relative to the lifting ring 655. The rotating base 624 is rigidly connected to the outer ring 621 via several lifting rods 623. Cleaning brushes 622, which directly contact the surface of the transparent cover 64, are distributed on the inner side of the outer ring 621. When the lifting component 65 moves the entire cleaning component 62 downwards along the protective cylinder 61 via the lifting ring 655, the rotating base 624 is forced to rotate around the axis of the protective cylinder 61 due to the constraint of the external guiding structure (such as the cooperation between the spiral guide groove 611 and the guide rod 625). This rotational motion is transmitted to the outer ring 621 via the lifting rods 623, causing the outer ring 621 and its inner cleaning brushes 622 to rotate circumferentially as it descends, thus creating a spiral wiping motion on the outer surface of the transparent cover 64. The boom 623 serves both as a connection and a torque transmission mechanism, and also creates an open space between the rotating seat 624 and the outer ring 621, facilitating the drainage and flow of rinsing fluid and preventing dirt accumulation from affecting the cleaning effect. After cleaning, the lifting component 65 drives the lifting ring 655 and the cleaning component 62 to rise and reset, and the cleaning brush 622 then leaves the surface of the transparent cover 64, returning to the high-position standby state.

[0040] In one embodiment, the outer wall of the protective cylinder 61 is provided with a spiral guide groove 611, and the inner wall of the rotating seat 624 is fixed with a plurality of guide rods 625 that cooperate with the spiral guide groove 611.

[0041] When the lifting component 65 drives the cleaning component 62 to move downward along the axial direction of the protective cylinder 61, the guide rod 625, fixed to the inner wall of the rotating seat 624, is embedded in the spiral guide groove 611 on the outer wall of the protective cylinder 61. Since the spiral guide groove 611 extends in a spiral shape relative to the axis of the protective cylinder 61, the guide rod 625 is forced to slide along the spiral trajectory of the groove during the descent of the rotating seat 624, thereby applying a circumferential component force around the axis of the protective cylinder 61 to the rotating seat 624, forcing the rotating seat 624 to rotate synchronously around the axis while descending in a straight line. The sliding fit between the guide rod 625 and the spiral guide groove 611 transforms the single linear motion input by the lifting component 65 into a composite motion of linear and rotational motion. Furthermore, the lead and direction of the spiral guide groove 611 determine the rotation angle corresponding to each unit distance of descent of the cleaning component 62, thereby controlling the wiping trajectory density and coverage of the cleaning brush 622 on the outer wall of the transparent cover 64. Multiple guide rods 625 evenly distributed circumferentially ensure that the rotating seat 624 is subjected to balanced force and moves smoothly, preventing skew and jamming caused by unilateral drive. When the cleaning component 62 rises, the guide rods 625 also slide in the opposite direction along the spiral guide groove 611, driving the rotating seat 624 to rotate in the opposite direction, so that the cleaning brush 622 returns to the high position with the same spiral trajectory, achieving comprehensive and uniform cleaning of the transparent cover 64.

[0042] In one embodiment, the drive mechanism 67 includes a conductive slip ring 674 and a motor 671 mounted on the bottom of the circuit board assembly 68. A first gear 672 is fixedly connected to the end of the output shaft of the motor 671. A second gear 673 that meshes with the first gear 672 is fixedly sleeved on the movable slip ring of the conductive slip ring 674. The bottom end of the movable slip ring of the conductive slip ring 674 is fixedly connected to the top end of the hollow hanging tube 69.

[0043] The motor 671 is fixedly mounted on the bottom of the circuit board assembly 68. A first gear 672, fixedly connected to the end of its output shaft, meshes with a second gear 673 fixedly sleeved on the moving slip ring 674. When the motor 671 is powered on, the first gear 672 drives the second gear 673 to rotate, which in turn drives the moving slip ring 674 to rotate around its axis. Since the bottom end of the moving slip ring 674 is fixedly connected to the top end of the hollow tube 69, this rotational motion is directly transmitted to the hollow tube 69, thereby driving the camera unit 63, fixed to the lower end of the hollow tube 69, to rotate synchronously around the axis of the protective cylinder 61, achieving circumferential scanning detection. During this process, the stationary slip ring of the conductive slip ring 674 is electrically connected to the circuit board assembly 68, and the moving slip ring maintains sliding electrical contact with the stationary slip ring while rotating with the hollow tube 69, thus providing a stable power supply and continuous transmission of high-definition video signals to the rotating camera unit 63, preventing the cable 5 from becoming tangled. This gear pair not only enables the speed reduction or speed increase of the transmission from the motor 671 to the hollow hanging tube 69, but also allows the rotation speed of the camera unit 63 to be adjusted by selecting the gear ratio, so as to meet the requirements of different apertures or detection accuracies.

[0044] In one embodiment, a worm gear 677 is fixedly sleeved on the outer wall of the hollow hanging pipe 69. A worm wheel 676 is meshed with one side of the worm gear 677. A rotating rod 675 is fixedly connected to the outer wall of the worm wheel 676. The rotating rod 675 rotates through the outer wall of the protective cylinder 61 and is fixedly connected to the second bevel gear 664.

[0045] When the hollow hanging pipe 69 rotates around its own axis under the drive of the motor 671, the worm 677, which is fixedly sleeved on its outer wall, rotates synchronously. The worm 677 meshes with the worm wheel 676 on one side, reducing the rotational motion of the hollow hanging pipe 69 by the worm wheel 676 and changing the transmission direction (usually a 90° reversal) before outputting it to the rotating rod 675 fixed to the outer wall of the worm wheel 676. The rotating rod 675 rotates through the side wall of the protective cylinder 61, with one end rigidly connected to the worm wheel 676 and the other end fixedly connected to the second bevel gear 664 in the transmission component 66, thereby drawing power from inside the protective cylinder 61 to the external transmission system. Because the worm gear pair has a self-locking characteristic, when the motor 671 stops after cleaning, the external load (such as the gravity or resistance of the cleaning component 62) cannot drive the worm 677 in the reverse direction, which can prevent the cleaning component 62 from accidentally obstructing the camera's field of view due to its own weight falling down. At the same time, this structure also allows the power parameters to be matched as needed by reasonably designing the tooth ratio of the worm gear 676 and the transmission ratio of the bevel gear pair according to the different speeds and torques required for detection and cleaning.

[0046] In this embodiment, when the device is in operation, the tripod 4 is first stably erected above the borehole. The reel 2 is controlled by a ground control device (not shown in the figure, such as an industrial computer or dedicated controller) to release the cable 5. The cable 5 is guided by the guide pulley 32 of the guide assembly 3, smoothly lowering the detection mechanism 6 into the borehole. The cable 5 contains power lines and signal lines. The ground control device supplies power to the circuit board assembly 68 through the cable 5. The circuit board assembly 68 then provides power to the motor 671 of the drive mechanism 67 and the camera unit 63. Simultaneously, the image signal captured by the camera unit 63 is also transmitted back to the ground display device through the cable 5, enabling real-time monitoring.

[0047] Rotation detection phase: The motor 671 is started, and its output shaft drives the first gear 672 to rotate. The first gear 672 meshes with the second gear 673, causing the rotating ring (rotor) of the conductive slip ring 674 to rotate. The rotating ring is fixedly connected to the hollow pipe 69, thereby causing the hollow pipe 69 and the camera unit 63 fixed at its lower end to rotate together around the axis of the protective cylinder 61 at a constant speed. During this process, the rewinder 2 continuously and slowly lowers the cable 5, so that the rotating camera unit 63 performs a spiral continuous scanning image of the borehole wall while descending at a constant speed, achieving detection without blind spots.

[0048] During the rotation of the camera unit 63, the worm gear 677 fixed on the hollow hanging tube 69 rotates accordingly, driving the worm wheel 676 meshing with it to rotate. The worm wheel 676 drives the second bevel gear 664 to rotate via the rotating rod 675, and the power is transmitted to the rotating column 662 via the first bevel gear 663, causing the ratchet 665 at the bottom of the rotating column 662 to rotate counterclockwise. Figure 5 (View from above) Rotation. At this time, under the action of the torsion spring 668, the tip of the ratchet 666 only slides or slightly lifts and bounces on the back of the ratchet 665 teeth, without getting stuck in the groove of the ratchet 665 teeth to drive the rotating frame 669. Therefore, the entire lifting component 65 and cleaning component 62 remain stationary, located above the transparent cover 64, and do not interfere with the camera's field of view.

[0049] Lens cleaning stage: If, during the descent and detection process, ground operators notice that the image is blurred due to dirt on the outer wall of the transparent cover 64, they can pause the descent of the retractor 2 and send a command through the ground control equipment to control the motor 671 to reverse.

[0050] When motor 671 reverses direction, the rotation direction of camera unit 63 also reverses. Through the reverse transmission of worm gear and bevel gear set, ratchet 665 is ultimately driven to rotate clockwise. At this time, the teeth of ratchet 665 push against ratchet 666, overcoming the torque of torsion spring 668, and driving rotating frame 669 to rotate together. Rotating frame 669 is fixed to reciprocating screw 653, thereby driving reciprocating screw 653 to rotate.

[0051] As the reciprocating screw 653 rotates, the transmission slider 651, which is connected to it, will descend linearly along the thread groove of the reciprocating screw 653. The transmission slider 651 drives the lifting ring 655 to descend synchronously via the connecting rod 652. The lifting ring 655 drives the cleaning component 62 inside it to move downward as a whole. During the downward movement, the guide rod 625, which is fixed to the inner side of the rotating seat 624, slides along the spiral guide groove 611 on the outer wall of the protective cylinder 61. This structure forces the rotating seat 624 to rotate around the axis of the protective cylinder 61 while descending.

[0052] Therefore, the rotating seat 624 drives the outer ring 621 and the cleaning brush 622 installed inside it to rotate and descend simultaneously via the suspension rod 623. The cleaning brush 622 performs a comprehensive and powerful cleaning of the outer surface of the transparent cover 64 in a "spiral wiping" manner, effectively scraping away the attached mud, scale and other dirt.

[0053] Cleaning, Resetting, and Continuing Probes: When the transmission slider 651 rises to the upper stop (i.e., the initial high position), the cleaning component 62 is fully reset and out of the field of view of the camera unit 63. At this time, the controllable motor 671 stops reversing. Thus, a complete automatic cycle of "lowering cleaning - rising and resetting" is completed. After the cleaning component 62 resets, the control motor 671 resumes forward rotation. At this time, the transmission chain drives the ratchet 665 to resume counterclockwise rotation, the ratchet 666 returns to the avoidance state under the action of the torsion spring 668, the rotating frame 669 and the reciprocating screw 653 stop rotating, and the cleaning mechanism remains stationary at the high position. The camera unit 63 resumes rotation, the rewinder 2 can continue to lower the cable 5, and the device continues to perform the drilling and detection task.

[0054] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A borehole television detection device, characterized in that, include: Tripod (4); The frame (1) is set on one side of the tripod (4); The winding device (2) is installed on the upper end of the frame (1), and the head end of the cable (5) is connected to the winding device (2); Cable (5); as well as The detection mechanism (6) is connected to the end of the cable (5); The detection mechanism (6) includes: A protective sleeve (61) connected to the cable (5); A transparent cover (64) is provided at the bottom of the protective cylinder (61). The camera unit (63) located inside the transparent cover (64) is used to capture images of the inner wall of the borehole; Cleaning component (62) disposed on the outside of the transparent cover (64); A lifting component (65) located outside the protective cylinder (61) is used to drive the cleaning component (62) to rise and fall. A transmission component (66) located on the outside of the protective cylinder (61) is used to drive the lifting component (65). The drive mechanism (67) disposed inside the protective cylinder (61) is used to drive the camera unit (63) to rotate around the axis of the protective cylinder (61); Hollow hanging pipe (69) for suspending the camera unit (63); The circuit board assembly (68), which is located on the top of the inner side of the protective cylinder (61) and electrically connected to the cable (5), is used to supply power to the drive mechanism (67) and the camera unit (63).

2. The borehole television detection device according to claim 1, characterized in that, The lifting component (65) includes: Two fixed blocks (654) are fixed to the side wall of the protective cylinder (61). A reciprocating screw (653) is rotatably connected between the two fixed blocks (654). A transmission slider (651) is connected to the outer wall of the reciprocating screw (653). When the reciprocating screw (653) rotates continuously in one direction, the transmission slider (651) can make automatic reciprocating linear motion along its outer wall. A fixing plate (658) is fixed to the side wall of the protective cylinder (61). A guide shaft (656) is fixed to the bottom end of the fixing plate (658). A guide slider (657) is slidably connected to the outer wall of the guide shaft (656).

3. The borehole television detection device according to claim 2, characterized in that, A connecting rod (652) is fixedly connected to both the guide slider (657) and the transmission slider (651), and a lifting ring (655) is fixedly connected to the bottom end of both connecting rods (652).

4. The borehole television detection device according to claim 3, characterized in that, The transmission component (66) includes a lifting block (661) fixed to the side wall of the protective cylinder (61), a rotating column (662) rotatably connected to the lifting block (661), a first bevel gear (663) fixedly sleeved on the outer wall of the rotating column (662), and a second bevel gear (664) meshing with one side of the first bevel gear (663).

5. The borehole television detection device according to claim 4, characterized in that, A ratchet (665) is fixedly connected to the bottom end of the rotating column (662), and a rotating frame (669) is rotatably connected to the upper side of the fixed block (654). The rotating frame (669) is coaxially fixedly connected to the reciprocating screw (653).

6. The borehole television detection device according to claim 5, characterized in that, The top of the rotating frame (669) is fixedly connected to several rotating shafts (667). The outer wall of the rotating shaft (667) is rotatably sleeved with ratchet teeth (666) that cooperate with the ratchet (665). A torsion spring (668) is connected between the ratchet teeth (666) and the rotating shaft (667).

7. The borehole television detection device according to claim 3, characterized in that, The cleaning component (62) includes a rotating seat (624) rotatably connected to the inner side of the lifting ring (655). An outer ring (621) is provided below the rotating seat (624). A cleaning brush (622) for cleaning the transparent cover (64) is distributed on the inner side of the outer ring (621). Several hanging rods (623) are fixedly connected between the rotating seat (624) and the outer ring (621).

8. The borehole television detection device according to claim 7, characterized in that, The outer wall of the protective cylinder (61) is provided with a spiral guide groove (611), and the inner wall of the rotating seat (624) is fixed with a number of guide rods (625) that cooperate with the spiral guide groove (611).

9. The borehole television detection device according to claim 1, characterized in that, The drive mechanism (67) includes a conductive slip ring (674) and a motor (671) mounted on the bottom of the circuit board assembly (68). A first gear (672) is fixedly connected to the end of the output shaft of the motor (671). A second gear (673) that meshes with the first gear (672) is fixedly sleeved on the movable slip ring of the conductive slip ring (674). The bottom end of the movable slip ring of the conductive slip ring (674) is fixedly connected to the top end of the hollow hanging tube (69).

10. The borehole television detection device according to claim 4, characterized in that, The hollow hanging pipe (69) is fixedly fitted with a worm (677) on its outer wall. A worm wheel (676) is meshed with one side of the worm (677). A rotating rod (675) is fixedly connected to the outer wall of the worm wheel (676). The rotating rod (675) rotates through the outer wall of the protective cylinder (61) and is fixedly connected to the second bevel gear (664).

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