A power protection pipe inner diameter change detection device

Abstract

The application belongs to the technical field of laser measuring inner diameter, and discloses a device for detecting the change of the inner diameter of a power protection pipeline, which comprises a pipeline robot, one side of the pipeline robot is fixedly connected with a fixing sleeve, one side of the fixing sleeve is provided with a square sleeve, the top and bottom of the square sleeve are both fixedly installed with laser ranging devices through bolts, and one side of the laser ranging device is communicated with the square sleeve. The laser ranging device is driven to rotate in multiple directions by the double-shaft motor and the reciprocating driving element, the blind area of the pipeline inner diameter detection is effectively eliminated, and the local deformation is accurately captured; the air is discharged through the exhaust sleeve by the linkage fan blade of the double-shaft motor, the surface of the laser ranging device is blown and cleaned, dust accumulation is avoided to interfere with the light path, the transmission cleaning element cleans the stubborn stains adhered on the laser ranging device, the working stability is ensured, the overall structure is compact and has strong linkage, and the detection accuracy and long-distance detection efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of laser diameter measurement technology, specifically a device for detecting changes in the inner diameter of power protection pipelines. Background Technology

[0002] As the core carrier of cable transmission in the power system, power protection pipelines are widely laid in underground pipe networks, along roadsides, and around buildings. The integrity of their inner diameter directly determines the efficiency of cable installation and long-term operational safety. After the pipelines are laid, they are susceptible to defects such as localized diameter reduction, elliptical deformation, and bulges or depressions in the inner wall due to factors such as uneven soil settlement, pressure from passing vehicles, changes in groundwater levels, and disturbances from surrounding construction. If such deformations are not detected in time, they can not only cause jamming during subsequent cable laying and damage to the insulation layer, but may also lead to rupture due to a decrease in the structural strength of the pipeline, resulting in power transmission interruption and seriously affecting industrial production and residents' lives.

[0003] Chinese patent CN107894211B discloses a device and method for detecting changes in the inner diameter of a pipe. The device includes an elastic ball with an even number of laser emitters evenly spaced on its surface. A support is located at the center of the elastic ball, and several laser receivers are correspondingly mounted on the support. The laser emitters and laser receivers work together to measure the distance between the surface of the elastic ball and the center of the elastic ball. This device can effectively detect changes in the inner diameter of various pipes. However, when the elastic ball moves inside the pipe, it is easily affected by the friction of the inner wall of the pipe and the local deformation and squeezing disturbance, which causes the symmetrically arranged laser emitters to tilt along their axes. This makes it impossible to accurately align with the specified detection section, resulting in deviations in the laser ranging data and making it difficult to accurately detect specific locations on the pipe.

[0004] Chinese patent CN206724898U discloses a pipe inner diameter detection device, which includes a light source and a first receiver positioned opposite to the light source. It utilizes the principle that light generated by the light source travels in a straight line inside the pipe. If the light reaches the first receiver, it means the light is not obstructed inside the pipe, and therefore half of the minimum inner diameter of the pipe should be greater than the distance between the center of the light source and the center of the pipe at this time. If the light does not reach the first receiver, it means the light is obstructed inside the pipe, and therefore half of the minimum inner diameter of the pipe should be less than the distance between the center of the light source and the center of the pipe at this time. This pipe inner diameter detection device is convenient to use, as it does not require the pipe to be placed vertically for detection. However, this device relies on the structure of installing the light source and receiver at both ends of the pipe. After the pipe is laid, both ends are often sealed, buried underground, or connected to other pipelines, making disassembly and assembly extremely difficult. It cannot penetrate deep into the pipe for detection, and it can only determine the inner diameter through light from a single direction, making it unable to accurately detect a specific location inside the pipe. Furthermore, dust and impurities inside the pipe easily adhere to the laser component, interfering with the detection accuracy, and it cannot meet the requirements for inner diameter detection of power protection pipes after installation. Summary of the Invention

[0005] To address the above problems, the present invention provides the following technical solution: A device for detecting changes in the inner diameter of a power protection pipeline includes a pipeline robot. A fixed sleeve is fixedly connected to one side of the pipeline robot. A square sleeve is provided on one side of the fixed sleeve. Laser ranging devices are bolted to the top and bottom of the square sleeve. One side of the laser ranging device is connected to the square sleeve. The device also includes: The self-cleaning rotating rangefinder is located inside the fixed sleeve and is used to drive the laser rangefinder to perform accurate multi-directional detection. The self-cleaning rotating rangefinder includes a rotating cylinder disposed inside a fixed sleeve. One end of the rotating cylinder extends through to the outside of the fixed sleeve and is fixedly connected to a square sleeve. The rotating cylinder is connected to the square sleeve. A transmission plate is movably connected to the rotating cylinder via a bearing. A transmission cleaning component connected to the transmission plate is disposed inside the fixed sleeve. A dual-axis motor is fixedly connected to the bottom of the transmission plate. A reciprocating drive component is disposed at one end of the output shaft of the dual-axis motor. A fan blade is fixedly connected to the other end of the output shaft of the dual-axis motor. A filter assembly is disposed inside the fixed sleeve. A camera is disposed on one side of the square sleeve. An exhaust sleeve is connected to the laser rangefinder. The calibration component, mounted on a fixed sleeve, is used to quickly calibrate the measurement accuracy of the laser rangefinder.

[0006] In the above technical solution, the transmission cleaning component includes a transmission motor fixedly connected to one side of the pipeline robot. The transmission motor is located inside the fixed sleeve, and a screw is fixedly connected to the output end of the transmission motor. The transmission plate is threadedly connected to the screw. A support sleeve is fixedly connected to the laser ranging device. A gear rod is movably connected inside the support sleeve via a bearing. A rotating plate is fixedly connected to one end of the gear rod. A sponge pad is fixedly connected to one side of the rotating plate. A self-driving component is provided inside the support sleeve.

[0007] In the above technical solution, the self-driving component includes a toothed plate slidably connected inside the support sleeve. The toothed plate meshes with a toothed rod. One side of the toothed plate is in contact with the surface of the laser rangefinder. A trapezoidal rod is provided inside the support sleeve. One end of the trapezoidal rod passes through the support sleeve and is fixedly connected to the toothed plate. A spring is sleeved on the trapezoidal rod. One end of the spring is fixedly connected to the toothed plate, and the other end of the spring is fixedly connected to the support sleeve.

[0008] In the above technical solution, the reciprocating drive component includes a reducer fixedly connected to one end of the output shaft of the dual-axis motor. A reciprocating lead screw is fixedly connected to the output end of the reducer. A gear sleeve is movably connected to the reciprocating lead screw. A gear cylinder is engaged on one side of the gear sleeve. The gear cylinder is fixedly connected to the inside of the rotating cylinder through a connecting plate.

[0009] In the above technical solution, the inside of the square sleeve is movably connected to a limiting tube via a bearing. One end of the limiting tube is fixedly connected to one side of the camera, and the other end of the limiting tube extends into the inside of the rotating cylinder. A square plate is slidably connected inside the limiting tube, and one end of the square plate is fixedly connected to the pipeline robot.

[0010] In the above technical solution, the filter assembly includes an inner cylinder fixedly connected inside the fixed sleeve, an outer cylinder fixedly connected to the dual-axis motor via a connecting plate, the outer cylinder being slidably sleeved on the inner cylinder, the fan blade being located inside the outer cylinder, and a filter cylinder being threadedly connected to the inside of the inner cylinder.

[0011] In the above technical solution, the calibration component includes a calibration sleeve fixedly connected to the fixed sleeve, the calibration sleeve being sleeved on the outside of the rotating cylinder, a trapezoidal plate fixedly connected to the top of the transmission plate, a trapezoidal sleeve fixedly connected inside the fixed sleeve, and the trapezoidal plate being slidably connected inside the trapezoidal sleeve.

[0012] In the above technical solution, the calibration sleeve is provided with a self-sealing protective component, which includes a Z-shaped plate provided on the calibration sleeve. One end of the Z-shaped plate passes through the calibration sleeve and the fixing sleeve in sequence and is fixedly connected to the trapezoidal plate. Two sliding rods are symmetrically fixedly connected to the Z-shaped plate. The fixed sleeve has two symmetrically arranged rotating rods movably connected to it via bearing seats. The rotating rods have L-shaped grooves, and the sliding rods are slidably connected inside the L-shaped grooves. One end of the rotating rods is fixedly connected to a semi-circular plate via a connecting plate.

[0013] In the above technical solution, a circular ring is fixedly connected inside the fixed sleeve, the left end of the screw extends into the inside of the circular ring, a sleeve plate is fixedly connected to the transmission plate, the sleeve plate is fitted onto the reciprocating screw, and two sleeve plates are symmetrically fixedly connected to the calibration sleeve, the sleeve plates are fitted onto the rotating rod.

[0014] In the above technical solution, a self-lubricating bushing is fixedly connected inside the fixed sleeve, the inner wall of the self-lubricating bushing is in contact with the surface of the rotating cylinder, and a sealing plate is hinged to one side of the exhaust sleeve by a torsion spring hinge.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, a dual-axis motor and a reciprocating drive unit drive the laser ranging device to perform multi-directional rotation detection, effectively eliminating blind spots in the detection of the inner diameter of the pipe and accurately capturing local deformation; the dual-axis motor and the fan blades drive air through the exhaust sleeve to blow away dust and self-clean the surface of the laser ranging device, avoiding dust accumulation that interferes with the optical path; the transmission cleaning component cleans stubborn stains adhering to the laser ranging device, ensuring operational stability; the overall structure is compact and highly interconnected, improving detection accuracy and long-distance detection efficiency.

[0016] 2. In this invention, the laser ranging device is prone to coaxiality deviation or laser emission angle deviation from the vertical direction due to wear of components from long-term use and vibration of the pipe, which affects the accuracy of detection. However, through the structural design of the calibration sleeve, trapezoidal plate and trapezoidal sleeve in the calibration component, the transmission cleaning component drives the laser ranging device to move into the calibration sleeve. The fixed-size calibration sleeve serves as the calibration component. The laser ranging device measures the known inner diameter of the calibration sleeve. By comparing the measured value with the standard size of the calibration sleeve, the detection deviation of the laser ranging device can be quickly quantified. The sliding fit between the trapezoidal plate and the trapezoidal sleeve can guide the transmission plate and ensure the stability of the rotating cylinder and the transmission plate.

[0017] 3. In this invention, when the calibration component is not in use, the port of the calibration sleeve is exposed, making the laser rangefinder and camera susceptible to damage from collisions with foreign objects or the intrusion of impurities. However, through the design of the Z-shaped plate, sliding rod, and rotating rod in the self-sealing protective component, the trapezoidal plate moves when it moves, which in turn moves the Z-shaped plate. The Z-shaped plate drives the sliding rod to slide along the L-shaped groove, and the sliding rod pushes the rotating rod to rotate through the L-shaped groove, thereby causing the semi-circular plate to close completely, completely sealing the port of the calibration sleeve, preventing foreign objects from colliding with the laser rangefinder, and extending its service life. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a cross-sectional schematic diagram of the fixing sleeve of the present invention; Figure 3 This is a schematic diagram of the transmission plate of the present invention; Figure 4 This is a schematic diagram of the structure of the transmission cleaning component of the present invention; Figure 5 This is a schematic diagram of the reciprocating drive component of the present invention; Figure 6 This is a schematic diagram of the Z-shaped plate of the present invention; Figure 7 This is a schematic diagram of the rotating rod of the present invention; Figure 8 This is a cross-sectional schematic diagram of the square plate of the present invention; Figure 9 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 10 This is a cross-sectional schematic diagram of the filter assembly of the present invention.

[0019] In the diagram: 1. Pipeline robot; 2. Fixed sleeve; 3. Square sleeve; 4. Laser rangefinder; 5. Self-cleaning rotating rangefinder; 51. Rotating cylinder; 52. Transmission plate; 53. Transmission cleaning component; 531. Transmission motor; 532. Screw; 533. Support sleeve; 534. Gear rack; 535. Rotating plate; 536. Sponge pad; 537. Self-driving component; 5371. Gear plate; 5372. Trapezoidal rod; 5373. Spring; 54. Dual-axis motor; 55. Reciprocating drive component; 551. Reducer; 552. Reciprocating lead screw; 5 53. Gear sleeve; 554. Gear cylinder; 56. Fan blade; 57. Filter assembly; 571. Inner cylinder; 572. Outer cylinder; 573. Filter cartridge; 58. Camera; 59. Exhaust sleeve; 6. Calibration assembly; 61. Calibration round sleeve; 62. Trapezoidal plate; 63. Trapezoidal sleeve; 7. Limiting tube; 8. Square plate; 9. Self-sealing protective component; 91. Z-shaped plate; 92. Slide rod; 93. Rotating rod; 94. L-shaped groove; 95. Semicircular plate; 10. Ring; 11. Sleeve plate one; 12. Sleeve plate two; 13. Self-lubricating bushing; 14. Sealing plate. Detailed Implementation

[0020] 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, and 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.

[0021] like Figures 1 to 3As shown, this invention provides a device for detecting changes in the inner diameter of power protection pipelines, including a pipeline robot 1. A fixing sleeve 2 is fixedly connected to one side of the pipeline robot 1. A square sleeve 3 is provided on one side of the fixing sleeve 2. A laser ranging device 4 is fixedly installed on the top and bottom of the square sleeve 3 by bolts. One side of the laser ranging device 4 is connected to the square sleeve 3. The device also includes: The self-cleaning rotating rangefinder 5 is located inside the fixed sleeve 2 and is used to drive the laser rangefinder 4 to perform accurate multi-directional detection. The self-cleaning rotating rangefinder 5 includes a rotating cylinder 51, which is disposed inside the fixed sleeve 2. One end of the rotating cylinder 51 extends through to the outside of the fixed sleeve 2 and is fixedly connected to the square sleeve 3. The rotating cylinder 51 is connected to the square sleeve 3. A transmission plate 52 is movably connected to the rotating cylinder 51 via a bearing. A transmission cleaning component 53 connected to the transmission plate 52 is disposed inside the fixed sleeve 2. A dual-axis motor 54 is fixedly connected to the bottom of the transmission plate 52. A reciprocating drive component 55 is disposed at one end of the output shaft of the dual-axis motor 54. A fan blade 56 is fixedly connected to the other end of the output shaft of the dual-axis motor 54. A filter assembly 57 is disposed inside the fixed sleeve 2. A camera 58 is disposed on one side of the square sleeve 3. An exhaust sleeve 59 is connected to the laser rangefinder 4. The calibration component 6, mounted on the fixed sleeve 2, is used to quickly calibrate the measurement accuracy of the laser rangefinder 4.

[0022] Specifically, the laser ranging device 4 is a laser ranging sensor. One side of the laser ranging device 4 is connected to an air intake sleeve, one end of which penetrates into the interior of the square sleeve 3. The air intake sleeve can limit the laser ranging device 4 and improve its stability. The camera 58 is a waterproof camera. The pipeline robot 1 consists of a box, motor, bidirectional lead screw, legs, and electric wheels. The motor can drive the legs to unfold through the bidirectional lead screw, allowing the electric wheels to adapt to power protection pipes of different diameters. The electric wheels can be electrically driven to rotate, thereby enabling the pipeline robot 1 to move inside the pipeline for convenient pipeline inspection. The laser ranging device 4 and the camera 58 are electrically connected to an external display device.

[0023] like Figures 2 to 4 As shown, the transmission cleaning component 53 includes a transmission motor 531 fixedly connected to one side of the pipeline robot 1. The transmission motor 531 is located inside the fixed sleeve 2. The output end of the transmission motor 531 is fixedly connected to a screw 532, and the transmission plate 52 is threadedly connected to the screw 532. A support sleeve 533 is fixedly connected to the laser ranging device 4. A gear 534 is movably connected inside the support sleeve 533 via a bearing. A rotating plate 535 is fixedly connected to one end of the gear 534. A sponge pad 536 is fixedly connected to one side of the rotating plate 535. A self-driving component 537 is provided inside the support sleeve 533. The self-driving component 537 includes a toothed plate 5371 that is slidably connected inside the support sleeve 533. The toothed plate 5371 meshes with the gear 534. One side of the toothed plate 5371 is in contact with the surface of the laser ranging device 4. A trapezoidal rod 5372 is provided inside the support sleeve 533. One end of the trapezoidal rod 5372 passes through the support sleeve 533 and is fixedly connected to the toothed plate 5371. A spring 5373 is sleeved on the trapezoidal rod 5372. One end of the spring 5373 is fixedly connected to the toothed plate 5371, and the other end of the spring 5373 is fixedly connected to the support sleeve 533.

[0024] Specifically, when not in use, the drive motor 531 can drive the screw 532 to rotate. The screw 532 drives the transmission plate 52 and the rotating cylinder 51 to move. The rotating cylinder 51 drives the laser rangefinder 4 to move closer to the fixed sleeve 2 through the square sleeve 3. After moving to a certain position, the toothed plate 5371 will contact the surface of the fixed sleeve 2. At this time, the toothed plate 5371 will not move, while the laser rangefinder 4 continues to drive the support sleeve 533 to move. The support sleeve 533 drives the toothed rod 534 to roll on the toothed plate 5371. The toothed rod 534 drives the rotating plate 535 and the sponge pad 536 to rotate 90 degrees. The sponge pad 536 cleans the surface of the laser rangefinder 4, making it easy to remove stubborn impurities or water droplets. When in use, the spring 5373 can reset the toothed plate 5371 through elasticity, and the trapezoidal rod 5372 can prevent the toothed plate 5371 from moving too far.

[0025] like Figures 3 to 5 As shown, the reciprocating drive 55 includes a reducer 551 fixedly connected to one end of the output shaft of the dual-axis motor 54. A reciprocating lead screw 552 is fixedly connected to the output end of the reducer 551. A gear sleeve 553 is movably connected to the reciprocating lead screw 552. A gear cylinder 554 meshes with one side of the gear sleeve 553. The gear cylinder 554 is fixedly connected to the inside of the rotating cylinder 51 through a connecting plate.

[0026] Specifically, the reducer 551 is a worm gear reducer, and one side of the reducer 551 is fixedly connected to the housing of the dual-shaft motor 54; a connecting rod is fixedly connected inside the gear sleeve 553, and a connecting sleeve is fitted on the connecting rod. The connecting sleeve is movably connected inside the reciprocating groove of the reciprocating screw 552. The continuous rotation of the reciprocating screw 552 can drive the gear sleeve 553 to reciprocate.

[0027] like Figure 2 and Figure 8As shown, the inside of the square sleeve 3 is movably connected to the limiting tube 7 via a bearing. One end of the limiting tube 7 is fixedly connected to one side of the camera 58, and the other end of the limiting tube 7 extends into the inside of the rotating cylinder 51. A square plate 8 is slidably connected inside the limiting tube 7, and one end of the square plate 8 is fixedly connected to the pipeline robot 1.

[0028] Specifically, the toothed cylinder 554 is fitted onto the square plate 8; through the sliding cooperation between the limiting tube 7 and the square plate 8, a stable limiting guide can be formed for the camera 58, effectively preventing the camera 58 from rotating during rotation detection, and facilitating the camera 58 to stably capture images of the inside of the pipe.

[0029] like Figure 3 and Figure 10 As shown, the filter assembly 57 includes an inner cylinder 571 fixedly connected inside the fixed sleeve 2, an outer cylinder 572 fixedly connected to the dual-axis motor 54 via a connecting plate, the outer cylinder 572 slidably sleeved on the inner cylinder 571, a fan blade 56 located inside the outer cylinder 572, and a filter cylinder 573 threadedly connected to the inside of the inner cylinder 571.

[0030] Specifically, the filter cartridge 573 is a metal filter cartridge, and a handle plate is fixedly connected inside the filter cartridge 573, which makes it convenient for users to rotate and disassemble the filter cartridge 573. The inner cylinder 571 and the outer cylinder 572 slide and fit together to form an air duct, which facilitates the guidance of air. The threaded filter cartridge 573 can efficiently filter out dust and impurities in the airflow, avoid impurities from contaminating the laser components and internal structure, and ensure stable self-cleaning and heat dissipation functions.

[0031] like Figures 2 to 5 As shown, the calibration assembly 6 includes a calibration sleeve 61 fixedly connected to the fixed sleeve 2. The calibration sleeve 61 is sleeved on the outside of the rotating cylinder 51. A trapezoidal plate 62 is fixedly connected to the top of the transmission plate 52. A trapezoidal sleeve 63 is fixedly connected inside the fixed sleeve 2. The trapezoidal plate 62 is slidably connected inside the trapezoidal sleeve 63.

[0032] Specifically, the calibration sleeve 61 is made of galvanized steel; the transmission cleaning component 53 drives the laser rangefinder 4 to move into the calibration sleeve 61. The fixed-size calibration sleeve 61 serves as a calibration component. The laser rangefinder 4 measures the known inner diameter of the calibration sleeve 61. By comparing the measured value with the standard size of the calibration sleeve 61, the detection deviation of the laser rangefinder 4 can be quickly quantified. The sliding fit between the trapezoidal plate 62 and the trapezoidal sleeve 63 can guide the transmission plate 52, ensuring the stability of the rotating cylinder 51 and the transmission plate 52.

[0033] like Figures 3 to 7As shown, a self-sealing protective component 9 is provided on the calibration sleeve 61. The self-sealing protective component 9 includes a Z-shaped plate 91 provided on the calibration sleeve 61. One end of the Z-shaped plate 91 passes through the calibration sleeve 61 and the fixing sleeve 2 in sequence and is fixedly connected to the trapezoidal plate 62. Two sliding rods 92 are symmetrically fixedly connected on the Z-shaped plate 91. Two symmetrically arranged rotating rods 93 are movably connected to the fixed sleeve 2 via bearing seats. The rotating rods 93 are provided with L-shaped grooves 94. The sliding rods 92 are slidably connected inside the L-shaped grooves 94. One end of the rotating rods 93 is fixedly connected to a semi-circular plate 95 via a connecting plate.

[0034] Specifically, the L-shaped groove 94 consists of a straight groove section and an inclined groove section. When the sliding rod 92 slides inside the straight groove section, the rotating rod 93 will not rotate. When the sliding rod 92 slides inside the inclined groove section, the sliding rod 92 will push the rotating rod 93 to rotate through the inner wall of the inclined groove section. The rotating rod 93 drives the semicircular plate 95 to rotate, so that the two semicircular plates 95 close, completely sealing the port of the calibration sleeve 61, preventing foreign objects from colliding with the laser rangefinder 4, and extending its service life. When the camera 58 moves into the inside of the calibration sleeve 61, the distance between the camera 58 and the semicircular plate 95 is greater than the length of the inclined groove section of the L-shaped groove 94, ensuring that the camera 58 will move out of the calibration sleeve 61 after the semicircular plate 95 rotates, and will not collide with the semicircular plate 95.

[0035] like Figures 3 to 5 As shown, a ring 10 is fixedly connected inside the fixed sleeve 2, and the left end of the screw 532 extends into the inside of the ring 10. A sleeve plate 11 is fixedly connected to the transmission plate 52 and is sleeved on the reciprocating screw 552. Two sleeve plates 12 are symmetrically fixedly connected to the calibration sleeve 61 and are sleeved on the rotating rod 93.

[0036] Specifically, the ring 10 can support the left end of the screw 532, improving the stability of the screw 532. The first sleeve 11 and the second sleeve 12 can respectively limit the reciprocating screw 552 and the rotating rod 93, improving the stability of the reciprocating screw 552 and the rotating rod 93 during rotation.

[0037] like Figures 1 to 3 As shown, a self-lubricating bushing 13 is fixedly connected inside the fixed sleeve 2. The inner wall of the self-lubricating bushing 13 is in contact with the surface of the rotating cylinder 51. A sealing plate 14 is hinged to one side of the exhaust sleeve 59 by a torsion spring hinge.

[0038] Specifically, the self-lubricating bushing 13 is a graphite copper bushing, which can reduce the friction between the rotating cylinder 51 and the fixed sleeve 2 and improve the smoothness of the rotating cylinder 51 during movement and rotation; by setting the sealing plate 14, the exhaust port of the exhaust sleeve 59 can be sealed and protected to prevent impurities from entering the interior of the exhaust sleeve 59.

[0039] Working principle and usage process of this invention: When in use, first place the pipeline robot 1 into the power protection pipe, then start the pipeline robot 1 to move, and the camera 58 simultaneously captures images of the inner wall of the pipeline to provide visual assistance for inspection; Start the drive motor 531. The drive motor 531 drives the drive plate 52 to move through the screw 532. The drive plate 52 drives the Z-shaped plate 91 and the slide rod 92 to move through the trapezoidal plate 62. At this time, the slide rod 92 will slide in the inclined section of the L-shaped groove 94, pushing the rotating rod 93 and the semi-circular plate 95 to rotate. When the slide rod 92 moves to the straight section of the L-shaped groove 94, the rotating rod 93 will not rotate. The drive plate 52 drives the square sleeve 3 and the laser rangefinder 4 to move to the outside of the calibration sleeve 61 through the rotating cylinder 51. At the same time, the drive plate 52 drives the outer cylinder 572 to slide on the inner cylinder 571 through the dual-axis motor 54. After reaching the appropriate position, the drive motor 531 is turned off. The dual-axis motor 54 is started, and one end of its output shaft drives the reciprocating screw 552 to rotate via the reducer 551. Through the meshing transmission between the gear sleeve 553 and the gear cylinder 554, the rotating cylinder 51 is driven to reciprocate around the self-lubricating bushing 13 within a certain angle, thereby driving the square sleeve 3 and the upper and lower symmetrical laser rangefinders 4 to rotate synchronously, realizing multi-directional diameter measurement of the inner wall of the pipe and capturing defects such as local diameter reduction and elliptical deformation.

[0040] The other end of the output shaft of the dual-axis motor 54 drives the fan blade 56 to rotate. The outer cylinder 572 and the inner cylinder 571 form a closed air duct. After the air passes through the filter cylinder 573 connected by threads in the inner cylinder 571 to remove dust, it is introduced into the laser rangefinder 4 and the exhaust sleeve 59 through the rotating cylinder 51 and the square sleeve 3. After the laser rangefinder 4 is cooled, it is blown out. The airflow pushes open the sealing plate 14 to blow and clean the window surface of the laser rangefinder 4. If there are stubborn stains, the drive motor 531 drives the screw 532 to rotate, which drives the drive plate 52 and the laser rangefinder 4 to move towards the fixed sleeve 2. After the toothed plate 5371 contacts the fixed sleeve 2, the support sleeve 533 continues to move so that the toothed bar 534 meshes with the toothed plate 5371 and rotates. The toothed bar 534 drives the rotating plate 535 and the sponge pad 536 to rotate and wipe the window surface, completing the deep cleaning.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting changes in the inner diameter of a power protection pipeline, comprising a pipeline robot (1), wherein a fixed sleeve (2) is fixedly connected to one side of the pipeline robot (1), and a square sleeve (3) is provided on one side of the fixed sleeve (2), wherein a laser ranging device (4) is fixedly installed on the top and bottom of the square sleeve (3) by bolts, and one side of the laser ranging device (4) is connected to the square sleeve (3), characterized in that, Also includes: The self-cleaning rotating rangefinder (5) is located inside the fixed sleeve (2) and is used to drive the laser rangefinder (4) to perform accurate multi-directional detection. The self-cleaning rotating distance measuring device (5) includes a rotating cylinder (51), which is disposed inside the fixed sleeve (2). One end of the rotating cylinder (51) extends through to the outside of the fixed sleeve (2) and is fixedly connected to the square sleeve (3). The rotating cylinder (51) is connected to the square sleeve (3). A transmission plate (52) is movably connected to the rotating cylinder (51) through a bearing. A transmission cleaning device (53) connected to the transmission plate (52) is disposed inside the fixed sleeve (2). The calibration component (6) is mounted on the fixed sleeve (2) and is used to quickly calibrate the measurement accuracy of the laser rangefinder (4); A dual-axis motor (54) is fixedly connected to the bottom of the transmission plate (52). A reciprocating drive component (55) is provided at one end of the output shaft of the dual-axis motor (54). A fan blade (56) is fixedly connected to the other end of the output shaft of the dual-axis motor (54). A filter component (57) is provided inside the fixed sleeve (2). A camera (58) is provided on one side of the square sleeve (3). An exhaust sleeve (59) is connected to the laser rangefinder (4). The transmission cleaning component (53) includes a transmission motor (531) fixedly connected to one side of the pipeline robot (1). The transmission motor (531) is located inside the fixed sleeve (2). A screw (532) is fixedly connected to the output end of the transmission motor (531). The transmission plate (52) is threadedly connected to the screw (532). A support sleeve (533) is fixedly connected to the laser ranging device (4). A rack (534) is movably connected inside the support sleeve (533) via a bearing. A rotating plate (535) is fixedly connected to one end of the rack (534). A sponge pad (536) is fixedly connected to one side of the rotating plate (535). A self-driving component (537) is provided inside the support sleeve (533). The self-driving component (537) includes a toothed plate (5371) slidably connected inside the support sleeve (533). The toothed plate (5371) meshes with a toothed rod (534). One side of the toothed plate (5371) is in contact with the surface of the laser rangefinder (4). A trapezoidal rod (5372) is provided inside the support sleeve (533). One end of the trapezoidal rod (5372) passes through the support sleeve (533) and is fixedly connected to the toothed plate (5371). A spring (5373) is sleeved on the trapezoidal rod (5372). One end of the spring (5373) is fixedly connected to the toothed plate (5371), and the other end of the spring (5373) is fixedly connected to the support sleeve (533).

2. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 1, characterized in that: The reciprocating drive component (55) includes a reducer (551) fixedly connected to one end of the output shaft of the dual-axis motor (54). A reciprocating lead screw (552) is fixedly connected to the output end of the reducer (551). A gear sleeve (553) is movably connected to the reciprocating lead screw (552). A gear cylinder (554) meshes with one side of the gear sleeve (553). The gear cylinder (554) is fixedly connected to the inside of the rotating cylinder (51) through a connecting plate.

3. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 1, characterized in that: The inside of the square sleeve (3) is connected to a limiting tube (7) via a bearing. One end of the limiting tube (7) is fixedly connected to one side of the camera (58), and the other end of the limiting tube (7) extends into the inside of the rotating cylinder (51). A square plate (8) is slidably connected inside the limiting tube (7), and one end of the square plate (8) is fixedly connected to the pipeline robot (1).

4. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 1, characterized in that: The filter assembly (57) includes an inner cylinder (571) fixedly connected inside the fixed sleeve (2), an outer cylinder (572) fixedly connected to the dual-axis motor (54) via a connecting plate, the outer cylinder (572) being slidably sleeved on the inner cylinder (571), the fan blade (56) being located inside the outer cylinder (572), and a filter cylinder (573) being threadedly connected inside the inner cylinder (571).

5. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 1, characterized in that: The calibration assembly (6) includes a calibration sleeve (61) fixedly connected to the fixed sleeve (2), the calibration sleeve (61) being fitted on the outside of the rotating cylinder (51), a trapezoidal plate (62) fixedly connected to the top of the transmission plate (52), a trapezoidal sleeve (63) fixedly connected inside the fixed sleeve (2), and the trapezoidal plate (62) being slidably connected inside the trapezoidal sleeve (63).

6. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 5, characterized in that: The calibration sleeve (61) is provided with a self-sealing protective component (9), which includes a Z-shaped plate (91) provided on the calibration sleeve (61). One end of the Z-shaped plate (91) passes through the calibration sleeve (61) and the fixing sleeve (2) in sequence and is fixedly connected to the trapezoidal plate (62). Two sliding rods (92) are symmetrically fixedly connected on the Z-shaped plate (91). The fixed sleeve (2) is movably connected to two symmetrically arranged rotating rods (93) via bearing seats. The rotating rods (93) are provided with L-shaped grooves (94). The sliding rod (92) is slidably connected inside the L-shaped grooves (94). One end of the rotating rod (93) is fixedly connected to a semi-circular plate (95) via a connecting plate.

7. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 6, characterized in that: The fixed sleeve (2) has a ring (10) fixedly connected inside. The transmission plate (52) has a first sleeve (11) fixedly connected. The first sleeve (11) is sleeved on the reciprocating screw (552). The calibration sleeve (61) has two second sleeves (12) symmetrically fixedly connected. The second sleeves (12) are sleeved on the rotating rod (93).

8. The device for detecting changes in the inner diameter of a power protection pipeline according to claim 1, characterized in that: The fixed sleeve (2) is internally fixedly connected to a self-lubricating bushing (13), the inner wall of the self-lubricating bushing (13) is in contact with the surface of the rotating cylinder (51), and a sealing plate (14) is hinged to one side of the exhaust sleeve (59) by a torsion spring hinge.

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