Appearance detection device for drainage pipeline

Abstract

The invention discloses a drainage pipeline appearance detection device, and relates to the field of drainage pipeline appearance detection.The drainage pipeline appearance detection device comprises a shell, a camera is embedded in the center of the front side of the shell, a fixing seat is connected to the rear side of the shell, a fixing ring is arranged on the outer side of the shell in a sleeving mode, and sliding grooves are formed in the fixing seat and the fixing ring correspondingly; a sliding block is arranged in the sliding groove, a telescopic groove is formed in the side, close to the fixing base and the outer side wall of the fixing ring, of the sliding groove, and a telescopic rod is arranged in the telescopic groove in a penetrating mode. According to the invention, the four pulleys are arranged, so that the shell can be supported, the shell is always centered with the drainage pipeline and stably moves in the detection process, and the situation that the shell is blocked by impurities in the drainage pipeline and inclines, shakes and even turns on one side can be effectively avoided; and by arranging a sliding block and a telescopic rod, the effect of adjusting the position of a pulley can be achieved, and the device can be suitable for drainage pipelines of various different specifications and sizes.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipe appearance detection, and in particular to a drainage pipe appearance detection device. Background Art

[0002] Drainage pipes refer to pipes that collect and discharge sewage, wastewater and rainwater, including main pipes, branch pipes and pipes leading to treatment plants. Pipes built on streets for road drainage are usually installed as a whole in an embedded manner underground. The pipe ports lead to drainage wells with manhole covers installed on them. Such manhole covers can be seen everywhere on city streets. When drainage pipes leak after long-term use, it is necessary to cut off the discharge of sewage and promptly check for damaged parts of the drainage pipes. Since the drainage pipes are installed in an embedded manner, the appearance of their outer walls cannot be inspected. Therefore, an endoscope is usually used to inspect the appearance of the inner walls of the drainage pipes.

[0003] The existing device for inspecting the appearance of the inner wall of a drainage pipe includes a detection body and a terminal, which are connected by a cable. The detection body is a vehicle-mounted type with rollers. The detection body is inserted into the drainage pipe and pushed in by the cable. The camera collects the image of the inner wall of the drainage pipe and transmits it to the terminal to check for leaks and damage in the drainage pipe.

[0004] However, since the size of the detection subject is difficult to match with drainage pipes of various sizes, the vehicle-mounted detection device only relies on rollers to contact the inner wall of the pipe in the drainage pipe, lacks a stable support effect, and when the cable propulsion device moves, the device is easily blocked by impurities and causes tilting, shaking or even overturning, affecting the clarity of the image captured by the camera. Summary of the invention

[0005] The object of the present invention is to provide a drainage pipe appearance detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a drainage pipe appearance inspection device, comprising a shell, a camera is embedded in the center of the front side of the shell, a fixed seat is connected to the rear side of the shell, a fixed ring is sleeved on the outer side of the shell, a slide groove is provided inside the fixed seat and the fixed ring, a sliding block is provided inside the slide groove, a telescopic groove is provided on the side of the slide groove close to the fixed seat and the outer wall of the fixed ring, a telescopic rod is penetrated inside the telescopic groove, a wheel frame is connected to one end of the telescopic rod away from the fixed seat and the fixed ring, a pulley is rotatably connected to the wheel frame, a wheel axle is penetrated in the middle of the pulley, a spring is sleeved on the outer side of the telescopic rod between the wheel frame, the fixed seat and the fixed ring, a through groove is provided on the side where the fixed seat and the fixed ring are close to each other, a connecting rod is penetrated inside the through groove, and a cleaning mechanism is installed on the outer wall of the shell.

[0007] Preferably, the slider is in the shape of a block with a right-angled trapezoidal longitudinal section, the hypotenuse of the slider faces the telescopic rod, the height dimension of the slider is matched with the height dimension of the slide slot, and the slider forms a sliding connection with the slide slot.

[0008] Preferably, the number of the slider, telescopic rod and pulley is four, and they are arranged equidistantly in the circumferential direction on the outside of the fixed seat and the fixed ring. The telescopic rod slides and telescopes in the telescopic groove, one end of the telescopic rod is connected to the wheel frame, and the other end of the telescopic rod contacts the inclined surface of the slider.

[0009] Preferably, there are four connecting rods, which are equidistantly arranged in the circumferential direction along the outer wall of the shell. The positions of the connecting rods correspond to the sliders. Both ends of the connecting rods pass through through grooves and are connected to the fixing seat and the sliders in the fixing ring.

[0010] Preferably, a cross-shaped groove is provided at the center of the fixing seat, a cross-shaped fixing frame is arranged inside the cross-shaped groove, a first electric push rod is installed inside the fixing seat on one side of the cross-shaped fixing frame, and a through hole is penetrated through the fixing seat.

[0011] Preferably, the cross-shaped fixing frame is connected to four sliding blocks respectively, and the cross-shaped fixing frame forms a sliding connection with the cross-shaped groove.

[0012] Preferably, the cleaning mechanism includes a sliding seat installed on the outer wall of the fixed ring, the front wall of the sliding seat is provided with a slot, a cleaning plate is movably inserted inside the slot, a pin is penetrated through the cleaning plate inside the slot, a torsion spring is sleeved on the outer side of the pin, a limiting ring is installed on the outer wall of the shell on the front side of the sliding seat, a mounting ring is installed on the outer wall of the shell on the rear side of the sliding seat, and a second electric push rod is connected between the mounting rings on the upper and lower sides of the shell and the sliding seat.

[0013] Preferably, the slide is in the shape of an arc plate, there are four slides, and they are arranged equidistantly in the circumferential direction along the outer wall of the fixed ring, a U-shaped connecting plate is connected between adjacent slides, the rear side wall of the slide is connected to the telescopic end of the second electric push rod, and the slide forms a sliding connection with the fixed ring.

[0014] Preferably, a limiting groove is formed through the side wall of the limiting ring, the cleaning plate is in the shape of an arc-shaped plate, the rear side of the cleaning plate protrudes and is inserted into the slot, the cleaning plate is rotatably connected with the slide seat through the pin shaft, and the cleaning plate passes through the limiting ring through the limiting groove.

[0015] Preferably, a fill light is installed inside the shell outside the camera, a glass cover is installed on the front side of the fill light, a battery is installed inside the shell on the rear side of the camera, an image processor is electrically connected above the battery, the image processor is electrically connected to a connecting cable, and the connecting cable passes through the fixing seat through a through hole and extends to the rear side to an external terminal.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The drainage pipe appearance inspection device is provided with four pulleys. Four pulleys are arranged equidistantly in the circumferential direction on the outer side of the fixed seat and the fixed ring, and the four pulleys are located at the upper, lower, left and right four positions of the shell. The shell is contacted with the inner wall of the drainage pipe through the four pulleys. The shell is supported by the four pulleys to keep the shell aligned with the drainage pipe at all times and move stably during the inspection process, which can effectively prevent the shell from being blocked by impurities in the drainage pipe and causing tilting, shaking or even overturning.

[0018] 2. The drainage pipe appearance inspection device is provided with a slider and a telescopic rod. When the slider moves forward in the slide groove, the oblique side of the slider pushes the telescopic rod to extend in the telescopic groove. When the slider moves backward in the slide groove, the spring rebounds and pulls the telescopic rod to shrink in the telescopic groove. The telescopic rod drives the pulley away from or close to the axis of the fixed seat through the wheel frame and the wheel axle, so as to achieve the effect of adjusting the position of the pulley. The device is suitable for drainage pipes of various specifications and sizes.

[0019] 3. The drainage pipe appearance inspection device is provided with a cleaning mechanism. When the inner wall of the drainage pipe is blocked by impurities during the moving inspection of the shell, which affects the image acquisition of the inner wall of the pipe, the second electric push rod extends to push the slide toward the limit ring, and the slide pushes the cleaning plate forward relative to the limit ring. At the same time, the rebound force of the torsion spring pushes the cleaning plate to expand outward until the side of the cleaning plate away from the slide contacts the inner wall of the drainage pipe. After that, when the shell moves forward, the cleaning plate will rub against the inner wall of the drainage pipe to scrape off the blocked impurities, thereby achieving a cleaning effect inside the drainage pipe and ensuring that there are no blind spots in the appearance inspection of the inner wall of the drainage pipe.

[0020] 4. The drainage pipe appearance inspection device is provided with a connecting rod, a cross-shaped fixing frame and a first electric push rod. The first electric push rod is extended and retracted to drive the cross-shaped fixing frame to move back and forth in the cross-shaped groove, and the cross-shaped fixing frame drives the four sliders in the fixing seat to move. When the four sliders in the fixing seat move, the four sliders in the fixing ring are driven to move by the connecting rod, thereby achieving the effect of adjusting the positions of the eight pulleys in the fixing seat and the fixing ring at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the side cutaway structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the front cutaway structure of the fixing seat of the present invention;

[0023] Figure 3 It is a schematic diagram of the side cutaway structure of the cleaning mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the cleaning mechanism of the present invention in an expanded state;

[0025] Figure 5 It is a schematic diagram of the connection structure between the cleaning plate and the slide seat of the present invention.

[0026] In the figure: 1. shell; 11. camera; 12. fill light; 13. glass cover; 14. battery; 15. image processor; 16. connecting cable; 2. fixing seat; 21. slide groove; 22. slider; 23. telescopic groove; 24. telescopic rod; 25. wheel frame; 26. pulley; 27. axle; 28. spring; 29. ​​through groove; 210. connecting rod; 211. cross groove; 212. cross fixing frame; 213. first electric push rod; 214. through hole; 3. fixing ring; 4. cleaning mechanism; 41. slide seat; 42. slot; 43. cleaning plate; 44. pin shaft; 45. torsion spring; 46. limit ring; 47. limit groove; 48. second electric push rod; 49. mounting ring; 410. U-shaped connecting plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 5As shown, the drainage pipe appearance detection device of this embodiment includes a shell 1, a camera 11 is embedded in the center of the front side of the shell 1, and the camera 11 is electrically connected to the image processor 15 through a circuit, and is used to extend into the drainage pipe to collect images inside the drainage pipe, and check the damage of the inner wall appearance of the drainage pipe. A fixed seat 2 is connected to the rear side of the shell 1, and a fixed ring 3 is sleeved on the outer side of the shell 1. A slide groove 21 is provided inside the fixed seat 2 and the fixed ring 3, and a slider 22 is provided inside the slide groove 21. A telescopic groove 23 is provided on one side of the slide groove 21 close to the outer wall of the fixed seat 2 and the fixed ring 3, and a telescopic rod 24 is provided inside the telescopic groove 23. The telescopic rod 24 is used to adjust the distance from the pulley 26 to the axis of the fixed seat 2 and the fixed ring 3, and the end of the telescopic rod 24 away from the fixed seat 2 and the fixed ring 3 is connected to the pulley The frame 25 is rotatably connected with a pulley 26, which is used for the pulley 26 to rotate relative to the drainage pipe when the shell 1 moves, so as to support the shell 1 to move smoothly. A wheel axle 27 is provided through the middle of the pulley 26, and the pulley 26 is rotatably connected with the wheel frame 25 through the wheel axle 27. A spring 28 is sleeved on the outer side of the telescopic rod 24 between the wheel frame 25 and the fixed seat 2 and the fixed ring 3. When the telescopic rod 24 loses the lifting effect of the slider 22, the spring 28 rebounds to pull the telescopic rod 24 to contract. The spring 28 is in a normal tension state when the slider 22 is at the rear side of the slide groove 21. A through groove 29 is provided on the side where the fixed seat 2 and the fixed ring 3 are close to each other. A connecting rod 210 is provided inside the through groove 29 to realize the linkage between the fixed seat 2 and the slider 22 in the fixed ring 3. A cleaning mechanism 4 is installed on the outer wall of the shell 1.

[0031] Specifically, the slider 22 is in the shape of a block with a right-angled trapezoidal longitudinal section, the hypotenuse of the slider 22 faces the telescopic rod 24, the height dimension of the slider 22 is adapted to the height dimension of the slide groove 21, the slider 22 forms a sliding connection with the slide groove 21, and when the cross-shaped fixing frame 212 moves back and forth in the cross-shaped groove 211, it drives the slider 22 in the fixing seat 2 to move back and forth in the slide groove 21.

[0032] Furthermore, there are four sliders 22, telescopic rods 24 and pulleys 26, which are arranged equidistantly in the circumferential direction outside the fixing seat 2 and the fixing ring 3. The four pulleys 26 are located at the upper, lower, left and right positions of the housing 1, so that the housing 1 is supported by the four pulleys 26, and the housing 1 is always aligned with the drainage pipe during the detection process and moves stably, which can effectively prevent the housing 1 from being blocked by impurities in the drainage pipe and tilting, shaking or even turning over. The telescopic rod 24 slides and retracts in the telescopic slot 23. One end of the telescopic rod 24 is connected to the wheel frame 25, and the other end of the telescopic rod 24 contacts the inclined surface of the slider 22. When the slider 22 moves forward in the slide groove 21, the inclined edge of the slider 22 pushes the telescopic rod 24 to extend out in the telescopic groove 23. When the slider 22 moves backward in the slide groove 21, the spring 28 rebounds and pulls the telescopic rod 24 to shrink in the telescopic groove 23. The telescopic rod 24 drives the pulley 26 away from or close to the axis of the fixed seat 2 through the wheel frame 25 and the wheel axle 27, which can be suitable for drainage pipes of various specifications and sizes.

[0033] Furthermore, there are four connecting rods 210, which are equidistantly arranged in the circumferential direction along the outer wall of the shell 1. The position of the connecting rod 210 corresponds to the slider 22. Both ends of the connecting rod 210 pass through the through groove 29 and are connected to the slider 22 in the fixed seat 2 and the fixed ring 3. When the four sliders 22 in the fixed seat 2 move, the four sliders 22 in the fixed ring 3 are driven to move by the connecting rod 210, thereby achieving the effect of adjusting the positions of the eight pulleys 26 in the fixed seat 2 and the fixed ring 3 at the same time.

[0034] Furthermore, a cross-shaped groove 211 is provided at the center of the fixing seat 2, a cross-shaped fixing frame 212 is arranged inside the cross-shaped groove 211, a first electric push rod 213 is installed inside the fixing seat 2 on one side of the cross-shaped fixing frame 212, and the cross-shaped fixing frame 212 is driven to move back and forth in the cross-shaped groove 211 by the extension and retraction of the first electric push rod 213, a through hole 214 is provided through the fixing seat 2, and a connecting cable 16 connected to the image processor 15 in the shell 1 passes through the fixing seat 2 through the through hole 214 and extends out from the rear side of the fixing seat 2.

[0035] Furthermore, the cross-shaped fixing frame 212 is connected to the four sliders 22 respectively, and the cross-shaped fixing frame 212 forms a sliding connection with the cross-shaped groove 211. When the cross-shaped fixing frame 212 moves in the cross-shaped groove 211, it drives the four sliders 22 in the fixing seat 2 to move synchronously.

[0036] Furthermore, the cleaning mechanism 4 includes a slide 41 installed on the outer wall of the fixing ring 3, a slot 42 is opened on the front side wall of the slide 41, a cleaning plate 43 is movably inserted inside the slot 42, a pin 44 is penetrated on the cleaning plate 43 inside the slot 42, a torsion spring 45 is sleeved on the outer side of the pin 44, and the torsion spring 45 is in a normal state when the cleaning plate 43 is fully extended outward, and when the cleaning plate 43 covers the outer wall of the fixing ring 3, it is limited by the limiting groove 47, and the torsion spring 45 has a rebound force. A limiting ring 46 is installed on the outer wall of the shell 1 on the front side of the slide 41, and a mounting ring 49 is installed on the outer wall of the shell 1 on the rear side of the slide 41 for installing a second electric push rod 48. The second electric push rod 48 is connected between the mounting rings 49 on the upper and lower sides of the shell 1 and the slide 41, and the number of the second electric push rods 48 is two, which are symmetrically arranged relative to the shell 1.

[0037] Furthermore, the slide 41 is in the shape of an arc plate. There are four slides 41, which are equidistantly arranged in the circumferential direction along the outer wall of the fixed ring 3. The position of the slide 41 on the outer wall of the fixed ring 3 is staggered with the position of the pulley 26 on the outer side of the fixed ring 3 to prevent the pulley 26 from blocking the forward and backward movement of the slide 41. A U-shaped connecting plate 410 is connected between adjacent slides 41. The rear side wall of the slide 41 is connected to the telescopic end of the second electric push rod 48. The slide 41 forms a sliding connection with the fixed ring 3. The second electric push rod 48 is extended to push the slide 41 to move toward the limit ring 46. The two second electric push rods 48 arranged up and down act on the two upper and lower slides 41, and the two slides 41 drive other slides 41 to move synchronously through the U-shaped connecting plate 410.

[0038] Furthermore, a limiting groove 47 is formed through the side wall of the limiting ring 46, and the cleaning plate 43 is in the shape of an arc-shaped plate. The rear side of the cleaning plate 43 protrudes and is inserted into the slot 42. Since the arc-shaped cleaning plate 43 cannot be fully inserted into the slide seat 41 for rotation, the rear side of the cleaning plate 43 protrudes, and the cleaning plate 43 forms a rotational connection with the slide seat 41 through the pin shaft 44. The cleaning plate 43 passes through the limiting ring 46 through the limiting groove 47, and the slide seat 41 is pushed toward the limiting ring 46 by the extension of the second electric push rod 48. The slide seat 41 pushes the cleaning plate 43 forward relative to the limiting ring 46. At the same time, the rebound force of the torsion spring 45 pushes the cleaning plate 43 to expand outward until the side of the cleaning plate 43 away from the slide seat 41 contacts the inner wall of the drainage pipe. When the shell 1 continues to move forward, the cleaning plate 43 will rub against the inner wall of the drainage pipe to scrape off the blocked impurities.

[0039] Furthermore, a fill light 12 is installed inside the shell 1 outside the camera 11. The fill light 12 is turned on to emit light, providing a bright environment for the camera 11 to capture images. A glass cover 13 is installed on the front side of the fill light 12. A battery 14 is installed inside the shell 1 on the rear side of the camera 11. An image processor 15 is electrically connected above the battery 14. The image processor 15 is electrically connected to a connecting cable 16. The connecting cable 16 passes through the fixing seat 2 through the through hole 214 and extends to the rear side to an external terminal. The camera 11 captures images in the drainage pipe and transmits the captured images to the image processor 15. The image processor 15 then transmits data to the terminal on the ground via the connecting cable 16 for user viewing convenience.

[0040] The method of using the present embodiment is as follows: when the user actually performs an appearance inspection on the inner wall of the drainage pipe to check for leakage and damage, the user first starts the first electric push rod 213, and the first electric push rod 213 extends to push the cross-shaped fixing frame 212 to move backward in the cross-shaped groove 211, and the cross-shaped fixing frame 212 drives the slider 22 to move backward. At this time, the spring 28 rebounds to pull the telescopic rod 24 to shrink in the telescopic groove 23, shortening the extension length of the pulley 26, and then inserts the housing 1 from the drainage well into the drainage pipe, controls the first electric push rod 213 to shrink, and the first electric push rod 213 shrinks. The cross-shaped fixing frame 212 is retracted and pulled to move forward in the cross-shaped groove 211, and the cross-shaped fixing frame 212 drives the slider 22 to move forward in the slide groove 21. At the same time, when the slider 22 in the fixing seat 2 moves, it drives the slider 22 in the fixing ring 3 to move through the connecting rod 210. The hypotenuse of the slider 22 pushes the telescopic rod 24 to extend out in the telescopic groove 23, and the spring 28 is stretched, so that the telescopic rod 24 drives the pulley 26 away from the axis of the fixing seat 2 and the fixing ring 3 through the wheel frame 25 and the wheel axle 27, and directly multiple pulleys 26 are in contact with the inner wall of the drainage pipe. The four pulleys 26 are moved in the four directions of the upper, lower, left and right of the shell 1. The support keeps the housing 1 aligned with the drainage pipe and moves stably during the detection process, which can effectively prevent the housing 1 from being blocked by impurities in the drainage pipe and causing tilting, shaking or even overturning. Then the connecting cable 16 is pushed so that the connecting cable 16 pushes the housing 1 forward in the drainage pipe. At the same time, the camera 11 collects images in the drainage pipe, and the fill light 12 is turned on to emit light, providing a bright environment for the camera 11 to collect images. The camera 11 transmits the collected images to the image processor 15, and the image processor 15 transmits the data to the terminal on the ground via the connecting cable 16. To facilitate user viewing, when the inner wall of the drainage pipe is blocked by impurities, affecting the image acquisition of the inner wall of the pipe, the second electric push rod 48 extends to push the slide 41 toward the limit ring 46, and the slide 41 pushes the cleaning plate 43 forward relative to the limit ring 46. At the same time, the rebound force of the torsion spring 45 pushes the cleaning plate 43 to expand outward until the side of the cleaning plate 43 away from the slide 41 contacts the inner wall of the drainage pipe, and then the shell 1 moves forward to drive the cleaning plate 43 forward, so that the cleaning plate 43 rubs against the inner wall of the drainage pipe to scrape off the blocked impurities, ensuring that there are no blind spots in the appearance inspection of the inner wall of the drainage pipe.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drainage pipe appearance inspection device, comprising a housing (1), characterized in that: A camera (11) is embedded in the center of the front side of the shell (1), a fixing seat (2) is connected to the rear side of the shell (1), a fixing ring (3) is sleeved on the outer side of the shell (1), a sliding groove (21) is provided inside the fixing seat (2) and the fixing ring (3), a sliding block (22) is provided inside the sliding groove (21), a telescopic groove (23) is provided on one side of the sliding groove (21) close to the outer wall of the fixing seat (2) and the fixing ring (3), a telescopic rod (24) is provided inside the telescopic groove (23), and the telescopic rod (24) is away from the fixing seat (2) and the fixing ring (3). One end of the seat (2) and the fixed ring (3) is connected to a wheel frame (25), a pulley (26) is rotatably connected to the wheel frame (25), a wheel axle (27) is arranged through the middle of the pulley (26), a spring (28) is sleeved on the outer side of the telescopic rod (24) between the wheel frame (25) and the fixed seat (2) and the fixed ring (3), a through groove (29) is opened on the side where the fixed seat (2) and the fixed ring (3) are close to each other, a connecting rod (210) is arranged through the inside of the through groove (29), and a cleaning mechanism (4) is installed on the outer wall of the shell (1).

2. The drainage pipe appearance detection device according to claim 1, characterized in that: The slider (22) is in the shape of a block with a right-angle trapezoidal longitudinal section, the hypotenuse of the slider (22) faces the telescopic rod (24), the height of the slider (22) is matched with the height of the slide groove (21), and the slider (22) and the slide groove (21) form a sliding connection.

3. The drainage pipe appearance detection device according to claim 1, characterized in that: The number of the slider (22), telescopic rod (24) and pulley (26) is four, and they are arranged equidistantly in the circumferential direction outside the fixed seat (2) and the fixed ring (3); the telescopic rod (24) slides and telescopes in the telescopic groove (23); one end of the telescopic rod (24) is connected to the wheel frame (25), and the other end of the telescopic rod (24) contacts the inclined surface of the slider (22).

4. The drainage pipe appearance detection device according to claim 1, characterized in that: The connecting rods (210) are four in number and are equidistantly arranged in the circumferential direction along the outer wall of the shell (1); the positions of the connecting rods (210) correspond to the sliders (22); and the two ends of the connecting rods (210) pass through the through slots (29) and are connected to the fixing seat (2) and the sliders (22) in the fixing ring (3).

5. The drainage pipe appearance detection device according to claim 1, characterized in that: A cross-shaped groove (211) is provided at the center of the fixing seat (2), a cross-shaped fixing frame (212) is arranged inside the cross-shaped groove (211), a first electric push rod (213) is installed inside the fixing seat (2) on one side of the cross-shaped fixing frame (212), and a through hole (214) is provided through the fixing seat (2).

6. The drainage pipe appearance detection device according to claim 5, characterized in that: The cross-shaped fixing frame (212) is respectively connected to four sliding blocks (22), and the cross-shaped fixing frame (212) is slidably connected to the cross-shaped groove (211).

7. The drainage pipe appearance inspection device according to claim 1, characterized in that: The cleaning mechanism (4) comprises a slide (41) mounted on the outer wall of the fixing ring (3); a slot (42) is provided on the front wall of the slide (41); a cleaning plate (43) is movably inserted in the slot (42); a pin (44) is provided through the cleaning plate (43) in the slot (42); a torsion spring (45) is sleeved on the outer side of the pin (44); a limit ring (46) is installed on the outer wall of the shell (1) on the front side of the slide (41); a mounting ring (49) is installed on the outer wall of the shell (1) on the rear side of the slide (41); and a second electric push rod (48) is connected between the mounting rings (49) on the upper and lower sides of the shell (1) and the slide (41).

8. The drainage pipe appearance detection device according to claim 7, characterized in that: The slide seat (41) is in the shape of an arc plate. There are four slide seats (41) and they are equidistantly arranged along the outer wall of the fixed ring (3) in the circumferential direction. A U-shaped connecting plate (410) is connected between adjacent slide seats (41). The rear side wall of the slide seat (41) is connected to the telescopic end of the second electric push rod (48). The slide seat (41) is in sliding connection with the fixed ring (3).

9. The drainage pipe appearance detection device according to claim 7, characterized in that: The side wall of the limiting ring (46) is penetrated by a limiting groove (47); the cleaning plate (43) is in the shape of an arc plate; the rear side of the cleaning plate (43) protrudes and is inserted into the interior of the slot (42); the cleaning plate (43) is rotatably connected to the slide seat (41) via the pin shaft (44); and the cleaning plate (43) penetrates the limiting ring (46) via the limiting groove (47).

10. The drainage pipe appearance inspection device according to claim 5, characterized in that: A fill light (12) is installed inside the housing (1) outside the camera (11), a glass cover (13) is installed on the front side of the fill light (12), a storage battery (14) is installed inside the housing (1) on the rear side of the camera (11), an image processor (15) is electrically connected above the storage battery (14), the image processor (15) is electrically connected to a connection cable (16), and the connection cable (16) passes through the fixing seat (2) through the through hole (214) and extends to the rear side to an external terminal.

Images