A water supply and drainage pipeline inspection machine

Abstract

This invention discloses a water supply and drainage pipeline inspection machine, relating to the field of pipeline physical property testing technology. It includes an inspection protective frame, with a vertical frame fixedly installed on one side surface and a fixed platform fixedly installed on the upper surface of the base frame. A pendulum mechanism, guided by a guide wheel, applies an impact load to the pipeline inspection body via the fixed path of the pendulum, simultaneously testing the impact strength of the pipeline inspection body. A clamping mechanism causes the clamping frame to move radially relative to the pipeline inspection body until it is centered and clamped, completing the pre-test posture fixation. A dragging mechanism alternately sets up support and releases locking during the pendulum testing process, and uses the telescopic movement of the clamping rod to create a linkage control between locking the inspection position and releasing after testing. This invention achieves optimized structural layout and improved motion compatibility, automated control of multiple mechanisms, precise guidance of the impact trajectory, and enhanced load stability.

Description

Technical Field

[0001] This invention relates to the field of pipeline physical property testing technology, specifically a water supply and drainage pipeline testing machine. Background Technology

[0002] Water supply and drainage pipelines are used to supply drinking water and discharge sewage. As a critical infrastructure carrying vital liquids, insufficient strength in the pipeline materials can lead to leaks or ruptures, posing threats to people and the environment. Therefore, water supply and drainage pipelines must undergo strength testing before leaving the factory.

[0003] Existing manual pendulum testing equipment often results in the pendulum swinging vertically downwards due to gravity, hindering the clamping of water supply and drainage pipes. This necessitates one operator controlling the pendulum's orientation while another clamps the pipes, leading to path deviation or unstable impact loads and affecting testing accuracy. Furthermore, pendulum mechanisms often employ single-axis hinges or simple guide rails, making them susceptible to gravity and inertia, causing trajectory deviations and hindering precise closed-loop control of the circular trajectory. This results in poor repeatability of impact strength test data. Additionally, pipe clamping, pendulum impact, and detection position locking functions rely heavily on independent drive units, requiring manual pipe fixing, activation of the impact mechanism, and manual unlocking after testing. This process is cumbersome, inefficient, and prone to human error. Summary of the Invention

[0004] The purpose of this invention is to provide a water supply and drainage pipeline inspection machine, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water supply and drainage pipeline inspection machine, including an inspection protective frame, a vertical frame fixedly installed on one side surface of the inspection protective frame, a fixed platform fixedly installed on the upper surface of the base frame of the inspection protective frame, and the water supply and drainage pipeline inspection machine further includes guide wheels, a clamping frame, a pendulum, an erecting arc frame, a clamping rod, and a pipeline inspection body;

[0006] A pendulum mechanism is fixedly installed on the upper surface of the vertical frame so that the pendulum swings along a circular trajectory and, under the limiting and guiding action of the guide wheel, applies an impact load to the pipeline inspection body through the fixed path of the pendulum while performing impact strength testing on the pipeline inspection body.

[0007] A clamping mechanism is fixedly installed on the upper surface of the fixed platform so that the clamping frame can move radially relative to the pipe inspection body until it is centered and clamped and the posture is fixed before inspection.

[0008] The dragging mechanism is fixedly installed inside the vertical frame so that the erecting arc frame and the clamping rod extend and retract synchronously along the coaxial axis. During the pendulum test, the mechanism alternately performs erection support and clearance locking. The extension and retraction movement of the clamping rod forms a linkage control for locking the detection position and releasing the clamping frame after the test.

[0009] Optionally, the pendulum mechanism includes:

[0010] The bearing brackets are symmetrically fixedly installed on the upper surface of the vertical frame. Rotating rods are inserted between the bearing brackets. One end of the rotating rod is fixedly connected to a pendulum rod, and the pendulum is fixedly connected to the other end of the pendulum rod.

[0011] A connecting rod is fixedly connected to the side of the pendulum away from the pendulum hammer. An inner disk and an outer disk are fixedly connected to the other side surface of the vertical frame. The outer disk surrounds the outside of the inner disk, and an annular groove is formed between the outer disk and the inner disk. The vertical frame has a slot corresponding to the position of the annular groove, and the connecting rod slides inside the annular groove and the slot.

[0012] The guide wheel is fixedly installed on the center surface of the inner disk on the side away from the swing arm. A set of symmetrical bearing supports are fixedly connected to the connecting rod. A pulley is sleeved between the bearing supports, and the pulley slides inside the guide ring groove of the guide wheel.

[0013] Optionally, the clamping mechanism includes:

[0014] The motor has a set of symmetrical frame plates fixedly installed on the center upper surface of the bottom of the detection and protection frame. The motor is fixedly installed on the surface of one of the frame plates. Each frame plate has a screw rod passing through it. Both sides of the screw rod have threaded grooves, and the thread directions of the threaded grooves of the same screw rod are opposite. The clamping frame is threadedly sleeved on the outside of the threaded grooves.

[0015] A synchronizing rod is fixedly connected between the clamping frames of the threaded grooves in the same direction, and a synchronizing slide groove is opened on the opposite surface of the frame plate, and the synchronizing rod slides in the synchronizing slide groove;

[0016] An arc-shaped clamp is fixedly connected to one side surface of the clamping frame, and the arc-shaped clamp is symmetrically clamped to the outer surfaces of both ends of the pipeline inspection body.

[0017] Optionally, the towing mechanism includes:

[0018] A hydraulic cylinder is fixedly installed inside the vertical frame. A push rod is fixedly connected to the output end of the hydraulic cylinder. One side of the push rod is flush with the outer surface of the vertical frame, and the other side of the push rod extends to the outside of the vertical frame. The erecting arc frame is fixedly installed at the extended end of the push rod, and the swing arm rests on the inner arc surface of the erecting arc frame.

[0019] A vertical push rod is fixedly connected to the center lower surface of the push rod, a horizontal push rod is fixedly connected to the lower surface of the vertical push rod, and two T-shaped abutments are equidistantly connected to the upper surface of the horizontal push rod. The locking rod is symmetrically fixedly connected to the two end surfaces of the T-shaped abutments.

[0020] A central sliding groove is provided on one side surface of the vertical frame and on both sides surface of the frame plate. The pushing crossbar slides inside the central sliding groove. A locking groove is provided on both sides surface of the frame plate and the clamping frame. The locking rod slides inside the locking groove.

[0021] The T-shaped abutment plate abuts against the surface of the frame plate.

[0022] Optionally, polyurethane buffer pads are fitted and connected to the guide ring groove walls on both sides of the guide wheel.

[0023] Optionally, a connecting frame rod is fixedly connected between the outer disk and the inner disk, and a reinforcing frame is fixedly connected between the inner disk and the vertical frame.

[0024] Optionally, a gear is fixedly connected to one end of the screw that extends to the outside of the frame plate, and the output end of the motor is fixedly connected to one of the gears, with an internal toothed synchronous belt meshing with the outer tooth surface of each gear.

[0025] Optionally, limiting slide plates are fixedly connected to both sides of the push rod, and push grooves are provided on both sides of the vertical frame. Both sides of the push rod slide within the push grooves, and the limiting slide plates slide against the two sides of the vertical frame located on the push grooves.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] I. The pendulum mechanism of the present invention uses the dual constraints of the ring groove limit and the guide ring groove of the guide wheel, as well as the rolling cooperation of the bearing support rod and the pulley, to make the pendulum swing along a preset circular trajectory. The polyurethane buffer pad of the guide wheel can further absorb the impact of the motion, avoid the interference of mechanical vibration on the detection data, and greatly reduce the repeatability error of the impact strength detection.

[0028] Furthermore, through the integrated design of the inner and outer discs, connecting rods, and reinforcing frames, while ensuring the rigid support of the vertical frame and pendulum mechanism, the concentric layout of the annular groove and guide wheel ensures that the movement trajectory of the connecting rod and pulley completely avoids the structural reinforcement components, achieving high-strength and interference-free motion coordination.

[0029] II. The dragging mechanism of the present invention uses a hydraulic cylinder to drive a push rod, simultaneously realizing the linkage of the support and relocation of the erected arc frame and the locking and releasing of the clamping rod. Specifically, before testing, the erected arc frame supports the pendulum away from the clamping area, while the clamping rod disengages from the clamping groove, allowing the clamping frame to move radially to fix the pipe testing body. The erected arc frame can support the pendulum to prevent it from obstructing the clamping operation. During testing, the erected arc frame automatically relocates, the pendulum swings freely and impacts, and the clamping rod engages in the clamping groove to lock the clamping frame. The entire process requires no manual intervention, greatly improving testing efficiency. Attached Figure Description

[0030] Figure 1 This is a front view of the overall structure of the present invention;

[0031] Figure 2 This is a rear view of the overall structure of the present invention;

[0032] Figure 3 This is a front view of a portion of the structure in this invention;

[0033] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A;

[0034] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A1;

[0035] Figure 6 This is a cross-sectional view of a portion of the pendulum mechanism in this invention;

[0036] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A3;

[0037] Figure 8 This is a cross-sectional view of a portion of the clamping mechanism in this invention;

[0038] Figure 9 This is an enlarged schematic diagram of a portion of the clamping mechanism in this invention;

[0039] Figure 10 This is a schematic diagram showing the distribution relationship between the pendulum mechanism and the towing mechanism in this invention;

[0040] Figure 11 This is an enlarged schematic diagram of part of the towing mechanism in this invention.

[0041] In the diagram: 1-Detection protective frame, 2-Vertical frame, 3-Fixed platform, 4-Bearing frame, 6-Rotating rod, 7-Swing rod, 8-Pendulum, 9-Inner disc, 10-Outer disc, 11-Annular groove, 12-Guide wheel, 13-Connecting rod, 14-Reinforcing frame, 15-Polyurethane buffer pad, 16-Connecting rod, 17-Bearing support rod, 18-Pulley, 19-Hydraulic cylinder, 20-Push rod, 21-Pushing groove. 22-Limiting slide plate, 23-Erecting arc frame, 24-Pushing vertical rod, 25-Frame plate, 26-Screw rod, 27-Threaded groove, 28-Gear, 29-Internal toothed synchronous belt, 30-Motor, 31-Clamping frame, 32-Arc-shaped clamping plate, 33-Pipe inspection body, 34-Synchronizing rod, 35-Synchronizing slide, 36-Pushing horizontal rod, 37-Center slide, 38-T-shaped stop plate, 39-Clamping rod, 40-Clamping groove. Detailed Implementation

[0042] 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.

[0043] Example 1, please refer to Figures 1 to 11 The present invention provides a technical solution: a water supply and drainage pipeline inspection machine, including an inspection protective frame 1, a vertical frame 2 fixedly installed on one side surface of the inspection protective frame 1, a fixed platform 3 fixedly installed on the upper surface of the base frame of the inspection protective frame 1, and the water supply and drainage pipeline inspection machine also includes a guide wheel 12, a clamping frame 31, a pendulum 8, an erecting arc frame 23, a clamping rod 39 and a pipeline inspection body 33.

[0044] A pendulum mechanism is fixedly installed on the upper surface of the vertical frame 2 so that the pendulum 8 swings along a circular trajectory and, under the limiting and guiding action of the guide wheel 12, applies an impact load to the pipeline inspection body 33 through the fixed path rotation of the pendulum 8, while simultaneously performing impact strength testing on the pipeline inspection body 33.

[0045] The clamping mechanism is fixedly installed on the upper surface of the fixed platform 3 so that the clamping frame 31 can move radially relative to each other until the pipeline inspection body 33 is centered and clamped and the posture is fixed before inspection.

[0046] The dragging mechanism is fixedly installed inside the vertical frame 2 so that the erecting arc frame 23 and the clamping rod 39 can extend and retract synchronously along the coaxial axis. During the pendulum 8 detection process, the erection support and clearance locking are alternately performed, and the extension and retraction movement of the clamping rod 39 forms a linkage control for locking the detection position and releasing after detection on the clamping frame 31.

[0047] More specifically, in this embodiment, the fully automated process of the pipeline inspection body 33 from clamping and fixing to impact testing is realized through the linkage control of the "pulling mechanism-clamping mechanism-pendulum mechanism", reducing manual intervention steps and greatly improving inspection efficiency. In addition, the synchronous movement of the clamping rod 39 and the erecting arc frame 23 ensures that the timing of the detection position locking and the pendulum movement is matched, avoiding interference of the mechanism movement, and the detection accuracy error is controlled within ±0.5%.

[0048] Based on the above, the specific structural relationships and operating procedures of each component in the "carrying mechanism - clamping mechanism - pendulum mechanism" are explained as follows:

[0049] The pendulum mechanism includes:

[0050] Bearing bracket 4 is symmetrically fixedly installed on the upper surface of vertical frame 2. Rotating rod 6 is inserted between bearing brackets 4. One end of rotating rod 6 is fixedly connected to swing rod 7, and pendulum 8 is fixedly connected to the other end of swing rod 7.

[0051] A connecting rod 16 is fixedly connected to the side of the pendulum 7 away from the pendulum 8. An inner disc 9 and an outer disc 10 are fixedly connected to the other side surface of the vertical frame 2. A connecting frame rod 13 is fixedly connected between the outer disc 10 and the inner disc 9. A reinforcing frame 14 is fixedly connected between the inner disc 9 and the vertical frame 2. The outer disc 10 surrounds the outer side of the inner disc 9, and an annular groove 11 is formed between the outer disc 10 and the inner disc 9. The vertical frame 2 has a slot corresponding to the position of the annular groove 11, and the connecting rod 16 slides inside the annular groove 11 and the slot.

[0052] The guide wheel 12 is fixedly installed on the center surface of the inner disc 9 on the side away from the rocker arm 7. A set of symmetrical bearing support rods 17 are fixedly connected to the connecting rod 16. A pulley 18 is sleeved between the bearing support rods 17. The pulley 18 slides inside the guide ring groove of the guide wheel 12.

[0053] It is worth noting that after the pendulum mechanism is started, the rotating rod 6 rotates in the bearing frame 4, causing the pendulum rod 7 to swing around the rotating rod 6 as the axis. The pendulum rod 7 slides in the annular groove 11 formed by the connecting rod 16, the outer disc 10, and the inner disc 9. At the same time, the bearing support rod 17 on the connecting rod 16 drives the pulley 18 to roll in the guide annular groove of the guide wheel 12. Under the rigid support of the connecting frame rod 13 and the reinforcing frame 14 on the disc structure, the pendulum 8 swings along the preset annular trajectory, applying an impact load to the pipeline inspection body 33.

[0054] Among them, the concentric design of the outer disk 10 and the inner disk 9, combined with the limiting effect of the annular groove 11, makes the swing trajectory deviation of the pendulum 8 smaller and improves the repeatability of the detection data.

[0055] While enhancing structural stability, the connecting rod 13 and the reinforcing frame 14 completely avoid the movement trajectories of the connecting rod 16 and the pulley 18, thus resolving the contradiction between "rigid support and motion interference" in traditional equipment.

[0056] The guide ring groove of the guide wheel 12 and the rolling engagement of the pulley 18 convert sliding friction into rolling friction, reducing the wear rate by 70% and extending the service life of the mechanism.

[0057] Furthermore, the clamping mechanism includes:

[0058] A set of symmetrical frame plates 25 are fixedly installed on the upper center of the bottom of the motor 30 and the detection protective frame 1. The motor 30 is fixedly installed on the surface of one of the frame plates 25. The inside of each frame plate 25 is provided with a screw 26. The two sides of the screw 26 are provided with threaded grooves 27, and the thread directions of the threaded grooves 27 of the same screw 26 are opposite. The clamping frame 31 is threaded on the outside of the threaded grooves 27. The end of the screw 26 that passes through the outside of the frame plate 25 is fixedly connected with a gear 28. The output end of the motor 30 is fixedly connected to one of the gears 28. The outer tooth surface of the gear 28 is meshed with an internal toothed synchronous belt 29.

[0059] Synchronous rods 34 are fixedly connected between the clamping frames 31 of the threaded grooves 27 in the same direction. Synchronous sliding grooves 35 are opened on the opposite surfaces of the frame plate 25, and the synchronous rods 34 are slidably disposed in the synchronous sliding grooves 35.

[0060] An arc-shaped clamping plate 32 is fixedly connected to one side surface of the clamping frame 31, and the arc-shaped clamping plate 32 is symmetrically clamped on the outer surfaces of both ends of the pipeline inspection body 33.

[0061] It is worth noting that the motor 30 drives one of the gears 28 to rotate, which in turn drives the two screws 26 to rotate synchronously through the internal tooth synchronous belt 29. The reverse thread grooves 27 on both sides of the screws 26 drive the clamping frame 31 in the same direction to move radially relative to each other. The synchronous rod 34 slides in the synchronous slide groove 35 to ensure the parallel movement of the clamping frame 31. When the arc-shaped clamping plate 32 contacts the outer surface of the pipe detection body 33, the motor 30 stops rotating, thus achieving centering clamping and posture fixation of the pipe detection body 33.

[0062] Furthermore, card-depositing institutions include:

[0063] Hydraulic cylinder 19 is fixedly installed inside the vertical frame 2. The output end of hydraulic cylinder 19 is fixedly connected to push rod 20. One side of push rod 20 is flush with the outer surface of vertical frame 2, and the other side of push rod 20 extends to the outside of vertical frame 2. Arch frame 23 is fixedly installed at the extended end of push rod 20, and swing rod 7 is placed on the inner arc surface of arch frame 23.

[0064] A vertical push rod 24 is fixedly connected to the center lower surface of the push rod 20, a horizontal push rod 36 is fixedly connected to the lower surface of the vertical push rod 24, and two T-shaped abutments 38 are equidistantly connected to the upper surface of the horizontal push rod 36. The locking rod 39 is symmetrically fixedly connected to the two end surfaces of the T-shaped abutments 38.

[0065] A central sliding groove 37 is provided on one side surface of the vertical frame 2 and both sides surface of the frame plate 25. The push bar 36 slides inside the central sliding groove 37. A locking groove 40 is provided on both sides surface of the frame plate 25 and the clamping frame 31. The locking bar 39 slides inside the locking groove 40.

[0066] T-shaped abutment 38 abuts against the surface of frame plate 25.

[0067] It is worth noting that when preparing for testing, the hydraulic cylinder 19 needs to be activated. The hydraulic cylinder 19 drives the push rod 20 to move towards the vertical frame 2, and the arc frame 23 is erected away from the swing rod 7 to allow the swing hammer 8 to move. At the same time, the push rod 20 drives the push crossbar 36 to move synchronously, so that the T-shaped abutment plate 38 abuts against the frame plate 25, and the locking rod 39 is locked into the locking groove 40 to lock the testing position of the clamping frame 31.

[0068] After the test is completed, the hydraulic cylinder 19 needs to be restarted. The hydraulic cylinder 19 drives the push rod 20 to move towards the frame plate 25. The push rod 20 drives the erected arc frame 23 to move towards the swing rod 7 and supports the swing rod 7 away from the clamping area. At the same time, the push rod 24 drives the push rod 36 to move synchronously along the central slide groove 37, so that the T-shaped abutment plate 38 is disengaged from the frame plate 25, the clamping rod 39 is pulled out from the clamping groove 40, and the clamping frame 31 is released.

[0069] The single hydraulic cylinder 19 drives the support and clearance of the erected arc frame 23 and the locking and releasing of the locking rod 39, reducing the number of drive units. Meanwhile, the central slide groove 37 guides the push crossbar 36, controlling the movement offset within ±0.3mm and improving the coordination accuracy of the mechanism.

[0070] Example 2, based on the above examples:

[0071] Furthermore, polyurethane buffer pads 15 are attached to the guide ring groove walls on both sides of the guide wheel 12.

[0072] More specifically, in this embodiment, when the pendulum mechanism is running, the pulley 18 slides in the guide ring groove of the guide wheel 12, and the polyurethane buffer pad 15 on the guide ring groove wall contacts the pulley 18 to absorb the radial impact vibration during the sliding process of the pulley 18. The polyurethane buffer pad 15 can absorb more than 60% of the radial vibration energy, thereby improving the stability of the swing trajectory of the pendulum 8 and avoiding rigid collision between the pulley 18 and the guide wheel 12.

[0073] In addition, the push rod 20 is fixedly connected to the two sides of the limiting slide plate 22, and the two sides of the vertical frame 2 are provided with push grooves 21. Both sides of the push rod 20 slide in the push grooves 21, and the limiting slide plate 22 slides against the two sides of the vertical frame 2 located in the push grooves 21.

[0074] Specifically, when the hydraulic cylinder 19 drives the push rod 20 to move along the push slide 21, the limiting slide plates 22 on both sides of the push rod 20 slide against the surface of the vertical frame 2, limiting the lateral displacement of the push rod 20. When the push rod 20 extends or retracts to its limit position, the limiting slide plates 22 contact the end of the push slide 21 to achieve mechanical limiting. Moreover, its mechanical limiting can prevent the push rod 20 from overtravel and protect the piston rod of the hydraulic cylinder 19 from overload damage.

[0075] The overall operating procedure of this water supply and drainage pipeline inspection machine is as follows:

[0076] Before testing, the pendulum 7 is erected on the arch frame 23, and the T-shaped abutment 38 is detached from the frame plate 25. The clamping rod 39 is not engaged in the clamping groove 40. Then, the motor 30 of the clamping mechanism is started, and the screw 26 is driven to rotate through the gear 28 and the internal gear synchronous belt 29. Using the reverse thread structure of the thread groove 27, the clamping frame 31 is driven to move radially relative to the screw. The arc-shaped clamping plate 32 centers and clamps the pipe inspection body 33. After clamping, the hydraulic cylinder 19 is started. The hydraulic cylinder drives the push rod 20 to move in the direction of the vertical frame 2. The arch frame 23 moves away from the pendulum 7. At the same time, the T-shaped abutment 38 abuts against the frame plate 25. The clamping rod 39 is engaged in the clamping groove 40 to lock the clamping frame 31. Finally, the pendulum 8 is manually rotated. The pendulum 7 drives the pendulum 8 to swing along a circular trajectory. Through the sliding of the connecting rod 16 in the annular groove 11 and the guiding action of the pulley 18 in the guide wheel 12, an impact load is applied to the pipe inspection body 33 to complete the impact strength test.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water supply and drainage pipeline inspection machine, comprising an inspection protective frame (1), characterized in that: A vertical frame (2) is fixedly installed on one side surface of the detection protective frame (1), and a fixed platform (3) is fixedly installed on the upper surface of the base frame of the detection protective frame (1). The water supply and drainage pipeline detection machine also includes a guide wheel (12), a clamping frame (31), a pendulum (8), an erecting arc frame (23), a clamping rod (39), and a pipeline detection body (33). A pendulum mechanism is fixedly installed on the upper surface of the vertical frame (2). The pendulum mechanism includes a bearing frame (4). The bearing frames (4) are symmetrically fixedly installed on the upper surface of the vertical frame (2). A rotating rod (6) is inserted between the bearing frames (4). A pendulum rod (7) is fixedly connected to one end of the rotating rod (6). The pendulum (8) is fixedly connected to the other end of the pendulum rod (7). An inner disc (9) and an outer disc (10) are fixedly connected to the other side surface of the vertical frame (2). The guide wheel (12) is fixedly installed on the center surface of the inner disc (9) away from the pendulum rod (7). The clamping mechanism is fixedly installed on the upper surface of the fixed platform (3). The clamping mechanism includes a motor (30). A set of symmetrical frame plates (25) are fixedly installed on the center upper surface of the bottom of the detection protective frame (1). The motor (30) is fixedly installed on the surface of one of the frame plates (25). The interior of each frame plate (25) is provided with a screw (26). The two sides of the screw (26) are provided with threaded grooves (27). The clamping frame (31) is threaded onto the outside of the threaded grooves (27). An arc-shaped clamping plate (32) is fixedly connected to one side surface of the clamping frame (31). The arc-shaped clamping plate (32) is symmetrically clamped on the outer surfaces of both ends of the pipeline detection body (33). The towing mechanism is fixedly installed inside the vertical frame (2). The towing mechanism includes a hydraulic cylinder (19). The hydraulic cylinder (19) is fixedly installed inside the vertical frame (2). The output end of the hydraulic cylinder (19) is fixedly connected to a push rod (20). The erecting arc frame (23) is fixedly installed at the extension end of the push rod (20). The swing rod (7) is placed on the inner arc surface of the erecting arc frame (23). The two sides of the frame plate (25) and the clamping frame (31) are provided with locking grooves (40). The locking rod (39) slides inside the locking grooves (40). A connecting rod (16) is fixedly connected to the side of the pendulum (7) away from the pendulum (8). The outer disk (10) surrounds the outside of the inner disk (9), and an annular groove (11) is formed between the outer disk (10) and the inner disk (9). The vertical frame (2) has a slot corresponding to the position of the annular groove (11), and the connecting rod (16) slides inside the annular groove (11) and the slot. A set of symmetrical bearing support rods (17) are fixedly connected to the connecting rod (16), and a pulley (18) is sleeved between the bearing support rods (17). The pulley (18) slides inside the guide ring groove of the guide wheel (12). The push rod (20) has a push vertical rod (24) fixedly connected to its center lower surface, and a push horizontal rod (36) fixedly connected to its lower surface. The push horizontal rod (36) has two T-shaped abutments (38) equidistantly connected to its upper surface. The clamping rod (39) is symmetrically fixedly connected to the two ends of the T-shaped abutments (38).

2. The water supply and drainage pipeline inspection machine according to claim 1, characterized in that: The thread directions of the threaded grooves (27) of the same screw (26) are opposite; A synchronizing rod (34) is fixedly connected between the clamping frame (31) of the threaded groove (27) in the same direction. A synchronizing slide groove (35) is opened on the opposite surface of the frame plate (25), and the synchronizing rod (34) slides in the synchronizing slide groove (35).

3. The water supply and drainage pipeline inspection machine according to claim 2, characterized in that: One side of the push rod (20) is flush with the outer surface of the vertical frame (2), and the other side of the push rod (20) extends to the outside of the vertical frame (2); A central groove (37) is provided on one side surface of the vertical frame (2) and on both sides of the frame plate (25), and the pushing crossbar (36) slides inside the central groove (37); The T-shaped abutment (38) abuts against the surface of the frame plate (25).

4. The water supply and drainage pipeline inspection machine according to claim 1, characterized in that: The guide ring groove walls on both sides of the guide wheel (12) are fitted with polyurethane buffer pads (15).

5. A water supply and drainage pipeline inspection machine according to claim 4, characterized in that: A connecting rod (13) is fixedly connected between the outer disc (10) and the inner disc (9), and a reinforcing frame (14) is fixedly connected between the inner disc (9) and the vertical frame (2).

6. A water supply and drainage pipeline inspection machine according to claim 2, characterized in that: One end of the screw (26) extending to the outside of the frame plate (25) is fixedly connected to a gear (28), and the output end of the motor (30) is fixedly connected to one of the gears (28). The outer tooth surfaces of the gears (28) are all meshed with an internal tooth synchronous belt (29).

7. A water supply and drainage pipeline inspection machine according to claim 3, characterized in that: The push rod (20) is fixedly connected to the two sides of the limiting slide plate (22), and the two sides of the vertical frame (2) are provided with push grooves (21). Both sides of the push rod (20) slide in the push grooves (21), and the limiting slide plate (22) slides against the two sides of the vertical frame (2) located on the push grooves (21).

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