A sewer inspection apparatus

Abstract

The application relates to the technical field of sewer pipeline detection, in particular to a water supply and drainage pipeline detection device, which comprises a vehicle frame, two groups of roller wheels arranged on the two sides of the vehicle frame, an elastic expansion mechanism arranged with two groups of roller wheels and connected to the two sides of the vehicle frame, a horizontal supporting assembly and a longitudinal guiding assembly, the horizontal supporting assembly and the longitudinal guiding assembly are matched, and can abut against the inner wall of a pipeline when the roller wheels are arranged in the pipeline, a drill bit rotatably arranged on the vehicle frame, a jacking assembly connected to the drill bit, a plurality of support pieces rotatably arranged on the drill bit at equal intervals, the jacking assembly can drive the support pieces to deflect outward when the roller wheels move away from the vehicle frame, and a telescopic transmission assembly connected to the drill bit and the roller wheels, the telescopic transmission assembly can drive the roller wheels to rotate when the drill bit rotates, thereby improving stability.

Description

Technical Field

[0001] This invention relates to the field of drainage pipeline inspection technology, specifically a water supply and drainage pipeline inspection device. Background Technology

[0002] Drainage pipelines refer to the systems of pipes and their ancillary facilities that collect and discharge sewage, wastewater, and rainwater. They mainly include main pipes, branch pipes, and pipes leading to treatment plants. Because drainage pipelines are often concealed in modern smart buildings, residents often find it difficult to see their layout or monitor their operation. However, the importance of drainage pipelines is self-evident; their safe operation is crucial for ensuring the normal lives of residents. Regular inspections are necessary to guarantee the safe operation of drainage pipelines.

[0003] In response, China has granted a patent (authorization announcement number: CN216433920U), proposing an intelligent building water supply and drainage pipeline detection device. This device includes a detection unit fixedly mounted on the surface of a drive unit. The drive unit comprises two sets of mirror-mounted frames with wheels, elastically connected by an elastic telescopic member. A drive shaft is fixedly mounted between the two wheels of each frame. A drive passive bevel gear is coaxially mounted on the drive shaft, meshing with a drive bevel gear. The drive bevel gear is axially fixedly mounted to one end of the output shaft of a dual-axis motor. A horizontal shaft is fixedly mounted on the other end of the output shaft of the dual-axis motor. When the two frames are placed on the inner wall of the pipeline, the springs are compressed, causing the wheels of the two frames to fit tightly against the inner wall of the pipeline. Simultaneously, the action of the two frames and the wheels results in a rectangular structure within the pipeline, providing better stability.

[0004] When the above application was applied to pipeline inspection, it was found that it could only be used to inspect pipelines with a predetermined diameter. When the pipeline diameter deviated significantly or slightly from the predetermined diameter, the inspection could not be completed, which greatly limited its application. Summary of the Invention

[0005] The purpose of this invention is to provide a water supply and drainage pipeline testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A water supply and drainage pipeline testing device, comprising:

[0008] The vehicle frame has two sets of rollers on each side and a camera unit on the vehicle frame.

[0009] The elastic expansion mechanism is provided with two groups of roller wheels connected to the two sides of the frame, and comprises a transverse support assembly and a longitudinal guide assembly. The transverse support assembly cooperates with the longitudinal guide assembly to abut against the inner wall of the pipeline when the roller wheels are placed in the pipeline.

[0010] A drill bit is rotatably installed on the frame.

[0011] A supporting assembly is connected to the drill bit, and the supporting assembly is connected to a plurality of supporting members that are circumferentially equidistant and rotatably installed on the drill bit. When the roller wheels move away from the frame, the supporting assembly can drive the supporting members to deflect outward.

[0012] A telescopic transmission assembly is connected to the drill bit and the roller wheels. When the drill bit rotates, the telescopic transmission assembly can drive the roller wheels to rotate.

[0013] As a further scheme of the present application, the transverse support assembly comprises a vertical plate installed on the frame, at least two horizontal shafts are installed on the two sides of the vertical plate, and an extrusion plate is slidably installed on the horizontal shafts.

[0014] A cylindrical spring is further sleeved on the horizontal shaft, one end of the cylindrical spring is connected to the vertical plate, and the other end of the cylindrical spring is connected to the extrusion plate.

[0015] The transverse support assembly further comprises a grooved wheel structure connecting the extrusion plate and the longitudinal guide assembly.

[0016] As a further scheme of the present application, the grooved wheel structure comprises an inclined groove provided on the extrusion plate and a connecting rod connected to the longitudinal guide assembly. One end of the connecting rod away from the longitudinal guide assembly is rotatably installed with a pulley, the pulley can roll in the inclined groove, and when the extrusion plate moves along the length direction of the horizontal shaft, the roller wheels can move towards or away from the frame.

[0017] As a further scheme of the present application, the longitudinal guide assembly comprises a fixed sleeve plate fixed on the frame. The fixed sleeve plate has a hollow structure, and a through groove is provided on one side of the fixed sleeve plate.

[0018] A telescopic plate is slidably installed in the fixed sleeve plate. One end of the telescopic plate away from the frame is rotatably connected to the rotating shaft of the roller wheels, and one end of the connecting rod away from the pulley penetrates through the through groove and is connected to the telescopic plate.

[0019] As a further scheme of the present application, a driving device is fixed on the frame. An output shaft of the driving device is connected to a rotating shaft rotatably installed on the frame. One end of the rotating shaft away from the driving device is coaxially and fixedly connected to the drill bit.

[0020] The rotation shaft is slidably installed with a follow-up sleeve, the follow-up sleeve is connected with the rotation shaft through a limiting structure, one side of the follow-up sleeve is connected with the top support assembly, and the other side is connected with one of the extrusion plates through a rotary connecting structure.

[0021] As a further scheme of the present application, the limiting structure comprises a groove arranged along the length direction of the rotation shaft and a protrusion arranged in the follow-up sleeve, the protrusion and the groove are slidably matched, so that the follow-up sleeve can rotate with the rotation shaft and slide along the length direction of the rotation shaft.

[0022] As a further scheme of the present application, the top support assembly comprises side plates which are circumferentially and equidistantly installed on the follow-up sleeve, and the end of the side plate away from the follow-up sleeve is symmetrically provided with a convex shaft.

[0023] The top support assembly further comprises a lag accommodating plate arranged along the length direction of the support, the lag accommodating plate is provided with a lag accommodating groove along the length direction thereof, and the convex shaft can slide along the length direction of the lag accommodating groove.

[0024] As a further scheme of the present application, the rotary connecting structure comprises a rotary connecting piece rotatably installed on the follow-up sleeve, a plurality of connecting rods are fixed on the rotary connecting piece, and the end of the connecting rod away from the rotary connecting piece is fixedly connected with the extrusion plate.

[0025] As a further scheme of the present application, the telescopic transmission assembly comprises a second connecting plate rotatably connected with the rotating shaft of the roller, a first connecting plate is rotatably installed on the second connecting plate, the end of the first connecting plate away from the second connecting plate is connected with a bevel gear set arranged on the vehicle frame, and the bevel gear set is connected with the rotation shaft.

[0026] Two coaxial pulleys are rotatably installed at the rotatable connection between the first connecting plate and the second connecting plate, one of the pulleys is connected with the bevel gear set through a first belt, and the other pulley is connected with the rotating shaft of the roller through a second belt.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] The elastic expansion mechanism can be arranged to realize that the plurality of rollers are in abutment with the inner wall of the pipeline, ensure the support force of the vehicle frame, and make the drill bit and the central axis of the pipeline be in the same line, improve the balance of the acting force of the drill bit in the pipeline, and avoid that the drill bit deviates to one side of the inner wall of the pipeline and causes the pipeline to be damaged due to vibration.

[0029] Through the set top support assembly, the deflection angle of the plurality of support members can be matched with the distance between the roller and the frame, and then the circumferential area formed by the outer end of the plurality of support members is matched with the inner diameter of the pipeline, so that the stirring range of the support members in the pipeline is improved when the drill bit rotates, and the cleaning effect of the sludge and other sundries in the pipeline is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Structure schematic view of one embodiment of the sewer pipeline detection device.

[0031] Figure 2 Structure schematic view of another angle of one embodiment of the sewer pipeline detection device. Figure 1

[0032] Figure 3 Structure schematic view of the elastic expansion mechanism in one embodiment of the sewer pipeline detection device.

[0033] Figure 4 Structure schematic view of the elastic expansion mechanism in one embodiment of the sewer pipeline detection device.

[0034] Figure 5 Structure schematic view of the elastic expansion mechanism in one embodiment of the sewer pipeline detection device. Figure 4

[0035] Figure 6 Structure schematic view of the top support assembly in one embodiment of the sewer pipeline detection device.

[0036] Figure 7 Structure schematic view of the top support assembly in one embodiment of the sewer pipeline detection device.

[0037] In the figure: 1, frame; 2, vertical plate; 3, extrusion plate; 4, inclined groove body; 5, horizontal shaft; 6, cylindrical spring; 7, pulley; 8, connecting rod; 9, fixed sleeve plate; 10, telescopic plate; 11, roller; 12, rotating shaft; 13, drill bit; 14, groove; 15, follow-up sleeve; 16, protrusion; 17, side plate; 18, protruding shaft; 19, connecting rod; 20, support member; 21, retention plate; 22, retention groove; 23, bevel gear set; 24, No. 1 connecting plate; 25, No. 2 connecting plate; 26, No. 1 belt; 27, No. 2 belt; 28, camera unit; 29, rotating connecting piece; 30, driving device. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. ​​

[0039] In addition, elements in the present application can be referred to or described as "coupled" with other elements, which can be directly connected to or be indirectly connected through other intermediate elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] Referring to Figures 1-7 In the embodiment of the present application, a kind of water supply and drainage pipeline detection device, including: frame 1, elastic expansion mechanism, drill bit 13, jacking assembly and telescopic transmission assembly, multiple rollers 11 can be realized with pipe inner wall abutment, guarantee the support force of frame 1, drill bit 13 can be made with the center axis of pipe collinear simultaneously, improve the balance of the force generated when drill bit 13 operates in pipe, avoid drill bit 13 deviate from the side of pipe inner wall and cause pipe damage due to vibration, simultaneously multiple support 20 The deflection angle of piece is matched with the distance between roller 11 and frame 1, and then the circumferential area formed by the outer end of multiple support 20 is matched with the inner diameter of pipe, improve the stirring range of support 20 in pipe when drill bit 13 rotates, guarantee the cleaning effect of sludge and other sundries in pipe.

[0041] Specific as follows: the two sides of the frame 1 are each provided with two groups of rollers 11, and the frame 1 is provided with a camera unit 28;

[0042] The elastic expansion mechanism is provided with two groups and is connected to the roller 11 on the two sides of the frame 1, and the elastic expansion mechanism includes a transverse support assembly and a longitudinal guide assembly, which cooperate with the transverse support assembly and the longitudinal guide assembly, and can abut with the inner wall of the pipe when the roller 11 is placed in the pipe;

[0043] The transverse support assembly includes a vertical plate 2 mounted on the frame 1, and at least two horizontal shafts 5 are mounted on the two sides of the vertical plate 2, and an extrusion plate 3 is slidably mounted on the horizontal shaft 5;

[0044] The horizontal shaft 5 is also sleeved with a cylindrical spring 6, one end of the cylindrical spring 6 is connected with the vertical plate 2, and the other end is connected with the extrusion plate 3;

[0045] The transverse supporting assembly further comprises a groove wheel structure connecting the extruding plate 3 and the longitudinal guiding assembly, the groove wheel structure comprises an inclined groove 4 arranged on the extruding plate 3 and a connecting rod 8 connected with the longitudinal guiding assembly, one end of the connecting rod 8 away from the longitudinal guiding assembly is rotatably installed with a pulley 7, the pulley 7 can roll in the inclined groove 4, when the extruding plate 3 moves along the length direction of the horizontal shaft 5, the roller 11 can move towards or away from the frame 1;

[0046] The longitudinal guiding assembly comprises a fixed sleeve plate 9 fixed on the frame 1, the inside of the fixed sleeve plate 9 is a hollow structure, and one side of the fixed sleeve plate 9 is provided with a through groove;

[0047] The fixed sleeve plate 9 is slidably installed with a telescopic plate 10, one end of the telescopic plate 10 away from the frame 1 is rotatably connected with the rotating shaft of the roller 11, and one end of the connecting rod 8 away from the pulley 7 penetrates through the through groove and is connected with the telescopic plate 10.

[0048] In use, the rotating shafts of the two groups of rollers 11 at the end of the frame 1 are compressed, so that the two groups of rollers 11 move towards the frame 1, at this time the telescopic plate 10 will move towards the inside of the fixed sleeve plate 9 and drive the connecting rod 8 to move, and the connecting rod 8 will drive the extruding plate 3 to move towards the vertical plate 2 under the action of the pulley 7 and the inclined groove 4 when moving, compress the cylindrical spring 6, then move the frame 1 to place the frame 1 inside the pipeline, and finally release the rotating shafts of the rollers 11, at this time the cylindrical spring 6 will release the elastic potential energy and drive the extruding plate 3 to move away from the vertical plate 2, and under the action of the pulley 7 and the inclined groove 4, the connecting rod 8 will move upwards to drive the telescopic plate 10 and the roller 11 to move away from the frame 1, until the roller 11 abuts against the pipe wall, the frame 1 is sleeved in the pipe, the frame 1 can move in the pipeline when the roller 11 rotates, and the frame 1 can coincide with the central axis of the pipeline due to the synchronous action of the two cylindrical springs 6, so that the drill bit 13 coincides with the central axis of the pipeline, and the drill bit 13 can act more uniformly in the pipeline.

[0049] Through the above arrangement, the multiple rollers 11 can abut against the inner wall of the pipeline, the support force of the frame 1 is ensured, the drill bit 13 can be collinear with the central axis of the pipeline, the balance of the acting force of the drill bit 13 in the pipeline is improved, and the pipeline is prevented from being damaged due to vibration caused by the drill bit 13 deviating to one side of the inner wall of the pipeline.

[0050] Please refer to Figure 1 , Figure 3 , Figure 6 , Figure 7 , the drill bit 13 is rotatably installed on the frame 1;

[0051] The frame 1 is fixed with a driving device 30, the output shaft of the driving device 30 is connected with a rotating shaft 12 which is rotatably installed on the frame 1, and the end of the rotating shaft 12 away from the driving device 30 is coaxially fixedly connected with the drill bit 13;

[0052] The rotating shaft 12 is slidably installed with a follow-up sleeve 15, the follow-up sleeve 15 is connected with the rotating shaft 12 through a limiting structure, and one side of the follow-up sleeve 15 is connected with the top support assembly, and the other side is connected with one of the extrusion plates 3 through a rotating connection structure;

[0053] The limiting structure comprises a groove 14 arranged along the length direction of the rotating shaft 12 and a protrusion 16 arranged in the follow-up sleeve 15, the protrusion 16 is slidably matched with the groove 14, so that the follow-up sleeve 15 can rotate with the rotating shaft 12 and can slide along the length direction of the rotating shaft 12;

[0054] The top support assembly is connected with the drill bit 13, the top support assembly is connected with a plurality of support pieces 20 which are circumferentially equidistantly and rotatably installed on the drill bit 13, and when the roller 11 moves away from the frame 1, the top support assembly can drive the support pieces 20 to deflect towards the outside;

[0055] The top support assembly comprises a side plate 17 which is circumferentially equidistantly installed on the follow-up sleeve 15, and the end of the side plate 17 away from the follow-up sleeve 15 is symmetrically provided with a convex shaft 18;

[0056] The top support assembly further comprises a lag accommodating plate 21 arranged along the length direction of the support piece 20, the lag accommodating plate 21 is provided with a lag accommodating groove 22 along the length direction thereof, and the convex shaft 18 can slide along the length direction of the lag accommodating groove 22;

[0057] The rotating connection structure comprises a rotating connecting piece 29 which is rotatably installed on the follow-up sleeve 15, the rotating connecting piece 29 is fixedly provided with a plurality of connecting rods 19, and the end of the connecting rod 19 away from the rotating connecting piece 29 is fixedly connected with the extrusion plate 3.

[0058] When the pipe is of different diameters, the distance between the roller 11 and the frame 1 will also change. When the pipe is of a larger diameter, the distance between the roller 11 and the frame 1 will increase, and the stroke amount of the extruding plate 3 moving away from the vertical plate 2 will also increase. At this time, the extruding plate 3 will drive the rotary connecting piece 29 to move away from the frame 1 along the length direction of the rotary shaft 12 through the connecting rod 19. At this time, the follower sleeve 15 will move synchronously with the rotary connecting piece 29, and the convex shaft 18 will move through the side plate 17, and the convex shaft 18 will drive the support piece 20 to deflect outwardly through the cooperation with the lag groove 22. That is, the larger the inner diameter of the pipe is, the greater the distance between the roller 11 and the frame 1 is, and the support pieces 20 will also deflect outwardly, so that the circumferential area formed by the end portions of the support pieces 20 can be matched with the inner diameter of the pipe.

[0059] Through the above setting, the deflection angle of the support pieces 20 can be matched with the distance between the roller 11 and the frame 1, and the circumferential area formed by the outer end portions of the support pieces 20 can be matched with the inner diameter of the pipe, so that the stirring range of the support pieces 20 in the pipe can be improved when the drill bit 13 rotates, and the cleaning effect of the sludge and other impurities in the pipe can be ensured.

[0060] It should be noted that the frame 1 is also provided with a clean water pumping device (not shown in the figure). The resistance when the frame 1 advances can be reduced by pumping clean water into the pipe, and the broken sludge in the pipe can be carried away by the clean water flow.

[0061] Please refer to Figures 1-2 , the telescopic transmission assembly is connected with the drill bit 13 and the roller 11, and can drive the roller 11 to rotate when the drill bit 13 rotates. The telescopic transmission assembly comprises a second connecting plate 25 rotationally connected with the rotating shaft of the roller 11, a first connecting plate 24 rotationally installed on the second connecting plate 25, and a bevel gear set 23 connected with the first connecting plate 24 away from the second connecting plate 25 and connected with the rotary shaft 12.

[0062] A first pulley and a second pulley coaxial with each other are rotationally installed at the rotationally connected position of the first connecting plate 24 and the second connecting plate 25. One of the pulleys is connected with the bevel gear set 23 through a first belt 26, and the other pulley is connected with the rotating shaft of the roller 11 through a second belt 27.

[0063] The bevel gear set 23 comprises a first bevel gear and a second bevel gear rotationally installed on the frame 1 and meshing with each other. The first bevel gear is fixedly connected with the rotary shaft 12 coaxially, and the second bevel gear is connected with the first belt 26.

[0064] When the rotating shaft 12 rotates, the rotating shaft of the roller 11 is driven to rotate through the bevel gear set 23, the first belt 26 and the second belt 27, and since the distance between the roller 11 and the frame 1 is variable, the effective transmission of power can be ensured through the first connecting plate 24 and the second connecting plate 25.

[0065] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and it is therefore intended that all changes and modifications that come within the meaning and range of equivalency of the claims are resolvable thereunder. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0066] Furthermore, it should be understood that although the present specification describes particular embodiments, each of which contains only a single independent technical solution, the specification is written so as to cover all combinations of described embodiments and their equivalents. It should also be understood that, unless otherwise expressly provided herein, any of the technical solutions described herein can be implemented alone or in combination with any of the other technical solutions described herein. Moreover, it is specifically intended that expressions used herein such as "comprising", "including", "containing", "consisting of", "consisting essentially of" and the like are used to mean "open ended" in the sense that additional technical solutions not specified can be present in the compositions, methods, or processes described herein.

Claims

1. A sewer inspection apparatus, characterized in that, The utility model relates to a kind of pipe drilling machine, including: Frame (1), two sides of the frame (1) are provided with two groups of roller (11), and camera unit (28) is provided on the frame (1); Elastic expansion mechanism, two groups are provided and respectively connected the roller (11) of the frame (1) two sides, the elastic expansion mechanism includes transverse support component and longitudinal guide component, the transverse support component is matched with longitudinal guide component, can be placed in pipe when roller (11) with pipe inner wall abuts; Drill bit (13), rotation is installed on the frame (1); Support component, which is connected with the drill bit (13), the support component is connected with a plurality of support pieces (20) that are circumferentially equidistant and rotationally installed on the drill bit (13), and the support component can drive the support pieces (20) to deflect towards the outside when the roller (11) moves away from the frame (1); Telescopic transmission assembly, connected with the drill bit (13) and the roller (11), the telescopic transmission assembly can drive the roller (11) to rotate when the drill bit (13) rotates; The transverse support component includes a vertical plate (2) mounted on the frame (1), at least two horizontal shafts (5) are mounted on both sides of the vertical plate (2), and an extrusion plate (3) is slidably mounted on the horizontal shaft (5); A cylindrical spring (6) is further sleeved on the horizontal shaft (5), one end of the cylindrical spring (6) is connected with the vertical plate (2), and the other end is connected with the extrusion plate (3); The transverse support component further includes a grooved wheel structure connecting the extrusion plate (3) and the longitudinal guide component; The grooved wheel structure includes an inclined groove (4) provided on the extrusion plate (3) and a connecting rod (8) connected with the longitudinal guide component, a pulley (7) is rotationally mounted on one end of the connecting rod (8) away from the longitudinal guide component, the pulley (7) can roll in the inclined groove (4), and when the extrusion plate (3) moves along the length direction of the horizontal shaft (5), the roller (11) can move towards or away from the frame (1); The longitudinal guide component includes a fixed sleeve plate (9) fixed on the frame (1), the inside of the fixed sleeve plate (9) is a hollow structure, and a through slot is provided on one side of the fixed sleeve plate (9); A telescopic plate (10) is slidably mounted in the fixed sleeve plate (9), one end of the telescopic plate (10) away from the frame (1) is rotationally connected with the rotating shaft of the roller (11), and one end of the connecting rod (8) away from the pulley (7) penetrates through the through slot and is connected with the telescopic plate (10); The frame (1) is fixed with a driving device (30), the output shaft of the driving device (30) is connected with a rotating shaft (12) rotationally mounted on the frame (1), and one end of the rotating shaft (12) away from the driving device (30) is coaxially fixedly connected with the drill bit (13). The rotating shaft (12) is slidably installed with a follow-up sleeve (15), the follow-up sleeve (15) is connected with the rotating shaft (12) through a limiting structure, and one side of the follow-up sleeve (15) is connected with the top support assembly, and the other side is connected with one of the extrusion plates (3) through a rotating connection structure. The limiting structure comprises a groove (14) arranged along the length direction of the rotating shaft (12) and a protrusion (16) arranged in the follow-up sleeve (15), the protrusion (16) and the groove (14) are in sliding fit, so that the follow-up sleeve (15) can rotate with the rotating shaft (12) and can slide along the length direction of the rotating shaft (12). The top support assembly comprises a side plate (17) installed at equal intervals in a circle on the follow-up sleeve (15), and the end of the side plate (17) away from the follow-up sleeve (15) is symmetrically provided with a convex shaft (18). The telescopic transmission assembly comprises a No. 2 connecting plate (25) rotatably connected with the rotating shaft of the roller (11), and a No. 1 connecting plate (24) is rotatably installed on the No. 2 connecting plate (25).

2. The sewer inspection apparatus of claim 1, wherein, The end of the No. 1 connecting plate (24) away from the No. 2 connecting plate (25) is connected with a bevel gear set (23) arranged on the vehicle frame (1), and the bevel gear set (23) is connected with the rotating shaft (12).

3. The sewer inspection apparatus of claim 2, wherein, The top support assembly further comprises a lag accommodating plate (21) arranged along the length direction of the support (20).

4. The sewer inspection apparatus of claim 3, wherein, The lag accommodating plate (21) is provided with a lag accommodating groove (22) along the length direction thereof, and the convex shaft (18) can slide along the length direction of the lag accommodating groove (22).

5. The sewer inspection apparatus of claim 2, wherein, The rotating connection structure comprises a rotating connecting piece (29) rotatably installed on the follow-up sleeve (15), a plurality of connecting rods (19) are fixed on the rotating connecting piece (29), and the ends of the connecting rods (19) away from the rotating connecting piece (29) are fixedly connected with the extrusion plates (3).

6. The sewer inspection apparatus of claim 2, wherein, The rotating connection between the No. 1 connecting plate (24) and the No. 2 connecting plate (25) is rotatably installed with two coaxial pulleys, one of the pulleys is connected with the bevel gear set (23) through a No. 1 belt (26), and the other pulley is connected with the rotating shaft of the roller (11) through a No. 2 belt (27).

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