Self-cleaning tube endoscope

Abstract

The application provides a self-cleaning pipeline endoscope, and belongs to the technical field of pipelines, which comprises a shell, the tail of the shell is connected with a cable, the head of the shell is rotationally connected with a hollow rotating rod A, the head wall surface of the rotating rod A is provided with a plurality of shooting probes, the tail wall surface of the inside of the shell is fixedly connected with a motor, and the head of the motor is provided with an assembly seat. The application solves the problems that the endoscope cannot shoot some places during use and is contaminated during use.

Description

Technical Field

[0001] This invention belongs to the field of pipeline technology, specifically relating to a self-cleaning pipeline endoscope. Background Technology

[0002] Endoscopes are commonly used in pipelines to record damage such as deformation and corrosion, and to accurately locate defects. Pipeline endoscopes can be used for inspection and observation in high-temperature, toxic, nuclear-radiation environments, and places where direct visual observation is impossible. However, endoscopes can become contaminated during use, obstructing the view. Therefore, a self-cleaning pipeline endoscope is proposed. Summary of the Invention

[0003] This invention provides a self-cleaning duct endoscope, which aims to solve the problems of areas that cannot be captured by the endoscope during use and the endoscope becoming contaminated with pollutants during use.

[0004] This invention provides a self-cleaning duct endoscope, comprising a housing, a cable connected to the rear end of the housing, a hollow rotating rod A rotatably connected to the head end of the housing, several imaging probes mounted on the head wall of the rotating rod A, a motor fixedly connected to the inner rear wall of the housing, a mounting base mounted on the head of the motor, a rotating rod B mounted on the rotating rod of the motor, and a linkage portion surrounding the rotating rod B mounted on the head of the mounting base. The head of the rotating rod is inserted into the rotating rod A and connected to the blade. The inner side of the outer shell is rotatably installed with linkage rods. The tail of the two linkage rods is connected to the umbrella disc A with reserved teeth that meshes with the linkage part. The meshing areas of the two umbrella discs A with reserved teeth face different directions. The head of the linkage rod is connected to the gearbox fixed to the inner wall of the outer shell. The peripheral tail of the rotating rod A is fixed to the rotating ring A with reserved teeth that is intermittently connected to two rotating rings B with several teeth.

[0005] Furthermore, the outer displacement ring of the rotating rod A is connected to the ring-shaped clean plate, the outer shell is connected to the electric cylinder A that pulls the clean plate to move, the inner tail wall of the outer shell is equipped with a liquid storage shell in the assembly seat, one tail of the liquid storage shell is connected to the connecting channel for inserting into the head of the clean plate, one head of the liquid storage shell is equipped with a re-drainage part, and the outer wall of the rotating rod B is equipped with a re-ejection part that matches the re-drainage part.

[0006] Furthermore, the head of the rotating rod A is arched, and the periphery of the cleaning sheet has a protrusion facing away from the center. The head of the electric cylinder A is connected to the tail of the protrusion.

[0007] Furthermore, the repeated drainage section includes a displacement channel fixed to the top of one side of the liquid storage shell, a displacement platform installed in the displacement channel, and a spiral beryllium copper wire supporting the displacement platform installed inside the liquid storage shell.

[0008] Furthermore, a traction rod fixed to the inner wall of the liquid storage tank is installed inside the spiral beryllium copper wire, and a check switch connecting the inside and outside of the liquid storage tank is installed on the displacement platform.

[0009] Furthermore, the repeating ejection part includes a cam that is clamped around the circumference of the rotating rod B and contacts one end of the displacement stage, and a stop part installed inside the cam. The tail of the cam is rotatably connected to the rotating rod B, and the head of the cam is engaged with the rotating rod B through the stop part.

[0010] Furthermore, the linkage part includes a linkage shell clamped to the periphery of the rotating rod B, a pre-toothed umbrella disc B and a pre-toothed umbrella disc C assembled in the linkage shell. The head of the linkage shell is open, and the pre-toothed umbrella disc B is rotatably connected to the tail of the linkage shell. Inside the pre-toothed umbrella disc B, a stop part two that engages with the rotating rod B is installed. Two pre-toothed umbrella discs C are installed, each mirror-engaging with the side of the pre-toothed umbrella disc B. Each pre-toothed umbrella disc C is connected to a connecting rod that penetrates the linkage shell. The end of the connecting rod opposite to the pre-toothed umbrella disc C is fixedly connected to a pre-toothed umbrella disc D. The pre-toothed umbrella disc D engages with a pre-toothed umbrella disc A.

[0011] Furthermore, the head of the mounting base is mirror-connected to a support rod fixed to the tail of the linkage housing, and an electric cylinder B is installed at one end of the support rod near the rotating rod B.

[0012] Furthermore, the stop part two includes a rotating plate assembled inside the umbrella disc B with pre-reserved teeth, and a displacement rod assembled inside the rotating plate and rotatably connected to the rotating plate. The inner head wall of the umbrella disc B with pre-reserved teeth has pre-reserved circumferentially evenly arranged embedding holes two. The displacement rod is displaced and clamped to the circumference of the rotating rod B. An embedding hook two cooperating with the embedding holes two is connected to the displacement rod.

[0013] Furthermore, the second embedded hook is connected to one end of the second elastic strip, the other end of the second elastic strip is connected to the rotating rod B, the displacement rod has a displacement groove that cooperates with the rotating rod B, and the head of the electric cylinder B is fixedly connected to the rotating plate.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention assembles a motor, linkage rod, gearbox, and a toothed rotating ring B inside a housing. A linkage part is installed on the rotating ring B. The two toothed rotating rings B intermittently engage with a pre-drilled rotating ring A on the rotating ring A. Thus, during motor rotation, the two linkage rods rotate in different directions, cooperating with the toothed rotating rings B to repeatedly rotate the rotating ring A on the housing, preventing areas from being missed during imaging. Furthermore, after an area with a problem is detected, the stop part in the linkage part, in cooperation with the electric cylinder B, prevents the rotating ring B from rotating the pre-drilled umbrella disc B of the linkage part, thus ensuring the imaging probe continuously faces the problem area and continuously reduces heat. When the wall of the imaging probe is contaminated with pollutants, during the approach period, the motor is turned on and rotated counterclockwise. The counterclockwise rotation of the motor pulls the cam and displacement stage to operate in the liquid storage tank, allowing the detergent to flow from the connection channel into the cleanable wall surface inside the clean plate, thereby achieving the purpose of autonomously cleaning the wall surface of the imaging probe.

[0016] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the cleanroom sheet structure according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the liquid storage shell structure according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the convex disk structure according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the linkage structure according to an embodiment of the present invention;

[0025] Figure 8 Embodiments of the present invention Figure 2Schematic diagram of the structure at point B;

[0026] Figure 9 This is a schematic diagram of the umbrella disk B structure according to an embodiment of the present invention;

[0027] Reference numerals: 2. Outer shell; 3. Cable; 5. Shell cover; 6. Rotating rod A; 7. Imaging probe; 8. Clean plate; 9. Electric cylinder A; 20. Motor; 21. Mounting base; 22. Rotating ring A with pre-drilled teeth; 23. Linkage rod; 24. Gearbox; 25. Umbrella disc A with pre-drilled teeth; 26. Rotating rod B; 27. Linkage part; 272. Linkage shell; 273. Umbrella disc B with pre-drilled teeth; 274. Umbrella disc C with pre-drilled teeth; 275. Connecting rod; 276. Umbrella disc D with pre-drilled teeth; 28. Liquid storage shell; 29. ​​Convex plate; 30. Rotating blade; 31. Spiral beryllium copper wire; 32. Displacement stage; 33. Support rod; 34. Electric cylinder B; 35. Rotating blade; 36. Displacement rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1-9This invention provides a self-cleaning duct endoscope, including a housing 2, with a cable 3 connected to the tail of the housing 2, and a hollow rotating rod A6 rotatably connected to the head of the housing 2. Several imaging probes 7 are installed on the head wall of the rotating rod A6, and the imaging positions of each imaging probe 7 can overlap with each other to achieve large-angle imaging. To prevent situations where the edges of the imaging positions of each imaging probe 7, especially the area close to the outer casing 2, are not captured, a motor 20 is fixedly connected to the inner rear wall of the outer casing 2. The rotor of the motor 20 can rotate clockwise and counterclockwise. A mounting base 21 is installed at the head of the motor 20 and is fixedly connected to the inner rear wall of the outer casing 2. A rotating rod B26 is installed on the rotor of the motor 20. A linkage part is installed at the head of the mounting base 21 around the rotating rod B26. The head of the rotating rod B26 is inserted into the rotating rod A6 and connected to the blade 30, which can reduce the heat of the imaging probe 7 in the rotating rod A6 during rotation. Inside the outer casing 2, two linkage rods 23 are rotatably mounted. The head and tail of each linkage rod 23 are rotatably connected to the inner wall of the outer casing 2. The tails of both linkage rods 23 are connected to pre-drilled umbrella discs A25 that mesh with the linkage mechanism. The meshing areas of the two pre-drilled umbrella discs A25 face different directions, thus ensuring that the two linkage rods 23 rotate in different directions under the traction of the linkage mechanism. The head of each linkage rod 23 is connected to a gearbox 24 fixed to the inner wall of the outer casing 2. The gearbox 24 reduces the number of rotations of the head of the linkage rod 23 within a specified time, thus reducing the rotation of the head and tail within a specified time. The number of rotations is different, and a rotating ring B with several teeth is installed at the head of the linkage rod 23. Thus, during the rapid rotation of the motor 20, the two rotating rings B with several teeth rotate at a lower number of rotations. The peripheral tail of the rotating rod A6 is fixedly connected to a rotating ring A22 with reserved teeth, which is intermittently connected to the two rotating rings B with several teeth. The two rotating rings B with several teeth intermittently engage with the rotating ring A22 with reserved teeth, allowing the rotating ring A22 with reserved teeth to rotate repeatedly. This can pull the rotating rod A6 and the imaging probe 7 to rotate, thus preventing some areas that the imaging probe 7 cannot capture at any time.

[0030] The rotating rod A6 is externally displaced by a ring-shaped cleaning plate 8. A friction cloth is placed inside the ring-shaped cleaning plate 8. The head of the cleaning plate 8 has a ring-shaped space reserved, and a connecting hole is reserved on the inner wall of the cleaning plate 8. The friction cloth is placed in the position of the connecting hole so that it can absorb detergent when conveying detergent. The outer shell 2 is connected to an electric cylinder A9 that pulls the cleaning plate 8 to move. The inner tail wall of the outer shell 2 is equipped with a liquid storage shell 28 in the mounting base 21 to hold the detergent of the cleaning imaging probe 7. One tail of the liquid storage shell 28 is connected to a connecting channel that is inserted into the head of the cleaning plate 8. The head of the connecting channel can be folded and stacked. One side of the head of the liquid storage shell 28 is equipped with an injection channel, and one side of the head of the liquid storage shell 28 is equipped with a re-drainage part. The outer wall of the rotating rod B26 is equipped with a re-ejection part that matches the re-drainage part.

[0031] An open hole is provided on one side of the outer shell 2, and a cover 5 is installed in the direction of the open hole. The cover 5 can be closed and opened to facilitate subsequent operations inside the outer shell 2.

[0032] The head of the rotating rod A6 is arched, and the periphery of the cleaning plate 8 has a protrusion facing away from the center. The head of the electric cylinder A9 is connected to the tail of the protrusion. The electric cylinder A9 pulls the cleaning plate 8 to move on the rotating rod A6 via the protrusion, thereby cleaning the imaging probe 7. The repeated rotation of the imaging probe 7 ensures better cleaning and a cleaner result.

[0033] The repeated drainage section includes a displacement channel fixed to the top of one side of the liquid storage shell 28, a displacement platform 32 installed in the displacement channel, and a spiral beryllium copper wire 31 supporting the displacement platform 32 installed inside the liquid storage shell 28. The repeated ejection section includes a cam 29 clamped to the side of the rotating rod B26 and in contact with one end of the displacement platform 32, and a stop part installed inside the cam 29. The rotating rod B26 pulls the cam 29 to rotate, thereby repeatedly pulling the displacement platform 32 to move repeatedly in the displacement channel. Due to the characteristics of the spiral beryllium copper wire 31, air is repeatedly injected into the liquid storage shell 28, thereby achieving the purpose of introducing detergent into the liquid storage shell 28 through the connection channel.

[0034] Inside the spiral beryllium copper wire 31, there is a traction rod fixed to the inner wall of the liquid storage shell 28, which can ensure the stability of the assembly base 21 during repeated operation. The displacement table 32 is equipped with a check switch that connects the inside and outside of the liquid storage shell 28, which allows air to continuously flow into the inside of the liquid storage shell 28 during the repeated displacement of the displacement table 32.

[0035] The tail of the cam 29 is rotatably connected to the rotating rod B26, supporting the cam 29. The head of the cam 29 is engaged with the rotating rod B26 via a stop part. The stop part includes an insert hook pinned to the rotating rod B26, an elastic strip with one end connected to the insert hook and the other end connected to the rotating rod B26, and an insert hole evenly pre-drilled on the cam 29 in a circle. When the rotating rod B26 rotates clockwise, it pulls the insert hook to rotate in the insert hole, and the cam 29 does not rotate. When the rotating rod B26 rotates counterclockwise, the insert hook is engaged in the insert hole, pulling the cam 29 to rotate counterclockwise.

[0036] The linkage includes a linkage housing 272 clamped to the periphery of the rotating rod B26, a pre-drilled vent plate B273 and a pre-drilled vent plate C274 fitted inside the linkage housing 272. The head of the linkage housing 272 is open, and the pre-drilled vent plate B273 is rotatably connected to the tail of the linkage housing 272. Inside the pre-drilled vent plate B273, a stop part two that engages with the rotating rod B26 is installed. Two pre-drilled vent plates C274 are installed, each mirror-engaging with the side of the pre-drilled vent plate B273, thus engaging and connecting with the pre-drilled vent plate B273. During the rotation of umbrella disc B273, the rotation directions of the two pre-toothed umbrella discs C274 are different. Each pre-toothed umbrella disc C274 is connected to a connecting rod 275 that penetrates the linkage shell 272. The end of the connecting rod 275 facing away from the pre-toothed umbrella disc C274 is fixedly connected to the pre-toothed umbrella disc D276. The pre-toothed umbrella disc D276 engages with the pre-toothed umbrella disc A25, so as to achieve the purpose of pulling the two pre-toothed umbrella discs D276 to rotate together during the rotation of the pre-toothed umbrella disc B273, and pulling the two linkage rods 23 to rotate together, but in different directions.

[0037] The head of the mounting base 21 is mirror-connected to the support rod 33, which is fixedly connected to the tail of the linkage housing 272. The support rod 33 ensures the stability of the linkage housing 272, and an electric cylinder B34 is installed at one end of the support rod 33 near the rotating rod B26.

[0038] The second stop part includes a rotating plate 35 installed inside the pre-drilled toothed umbrella disc B273, and a displacement rod 36 installed inside the rotating plate 35 and rotatedly connected to the rotating plate 35. The inner head wall of the pre-drilled toothed umbrella disc B273 has pre-drilled circumferentially evenly arranged embedding holes 2. The displacement rod 36 is displaced and clamped to the circumference of the rotating rod B26. The displacement rod 36 is connected to an embedding hook 2 that cooperates with the embedding hole 2. When the rotating rod B26 rotates clockwise, the embedding hook 2 cooperates with the embedding hole 2 to pull the pre-drilled toothed umbrella disc B273 to rotate. When the rotating rod B26 rotates counterclockwise, it does not pull the pre-drilled toothed umbrella disc B273 to rotate.

[0039] The second embedded hook is connected to one end of the second elastic strip, and the other end of the second elastic strip is connected to the rotating rod B26. The displacement rod 36 has a displacement groove that cooperates with the rotating rod B26, allowing the rotating rod B26 to pull the displacement rod 36 to rotate. The displacement rod 36 can move on the rotating rod B26. The head of the electric cylinder B34 is fixed to the rotating plate 35. When the electric cylinder B34 retracts, it pulls the rotating plate 35 and the displacement rod 36 to move towards the tail. The second elastic strip of the second embedded hook is forced to change, causing the second embedded hook to rotate and separate from the second embedded hole. This prevents the rotating rod B26 from pulling the umbrella disc B273 with the pre-reserved teeth to rotate. When the electric cylinder B34 is extended, the second embedded hook is pulled by the second elastic strip and can be embedded into the second embedded hole. The position of the second embedded hook can be controlled to make it easy for the second embedded hook to be embedded into the second embedded hole.

[0040] The specific implementation method is as follows: Due to the cable 3, the rotating rod A6 and the imaging probe 7 are moved into the pipe to perform imaging. Then, the motor 20 and imaging probe 7 can be turned on. The rotating rod of the motor 20 rotates, pulling the rotating rod B26 to rotate. This, in turn, pulls the pre-toothed umbrella disc B273 to rotate via the stop part two. The rotation of the pre-toothed umbrella disc B273 pulls the two pre-toothed umbrella discs C274 on both sides to rotate in different directions. During the rotation of the pre-toothed umbrella disc C274, the connecting rod 275 pulls the two pre-toothed umbrella discs D276 to rotate together. Because of the pre-toothed... The toothed umbrella disc D276 engages with the pre-drilled umbrella disc A25. The two linkage rods 23 rotate in different directions. During the rotation of the linkage rods 23, the rotating ring B with several teeth is pulled to rotate. The two rotating rings B with several teeth intermittently engage with the pre-drilled rotating ring A22, pulling the pre-drilled rotating ring A22 to rotate repeatedly. During the repeated rotation of the pre-drilled rotating ring A22, the rotating rod A6 is pulled to rotate repeatedly, thereby pulling several imaging probes 7 to rotate repeatedly. During the repeated rotation, the several imaging probes 7 can perform comprehensive imaging of the pipeline.

[0041] During filming, when the corresponding filming probe 7 captures an area with a problem in the pipe, the electric cylinder B34 retracts. The retraction of the electric cylinder B34 pulls the rotating plate 35 and the displacement rod 36 to move on the rotating rod B26, so that the two embedded hooks on the displacement rod 36 do not stop the two embedded holes. This prevents the umbrella disc B273 with the pre-reserved teeth from rotating with the rotating rod B26, allowing the filming probe 7 to continue to face the area with a problem.

[0042] While the probe 7 is contaminated with pollutants, the motor 20 is turned counterclockwise. The second insertion hook in the pre-drilled umbrella disc B273 does not restrict the second insertion hole, while the first insertion hook in the convex disc 29 restricts the first insertion hole. This prevents the pre-drilled umbrella disc B273 from rotating, while the convex disc 29 rotates. During the rotation of the convex disc 29, the traction displacement stage 32 repeatedly moves within the displacement channel, forcing the air in the displacement channel into the liquid storage tank 28. This allows the detergent in the liquid storage tank 28 to flow into the cleaning plate 8 through the connecting channel. Inside the cleanroom plate 8, the material is fed onto the friction cloth via a circular connecting hole. After ensuring it is moistened, the motor 20 rotates clockwise, the convex disc 29 remains stationary, and the umbrella disc B273 with pre-drilled teeth rotates. This causes the rotating rod A6 to rotate, and the electric cylinder A9 is activated, extending its length. The electric cylinder A9 pulls the cleanroom plate 8 towards the head, cleaning the wall of the imaging probe 7 and contacting it. After one cycle, the electric cylinder A9 returns to its initial state, achieving the purpose of cleaning the wall of the imaging probe 7. The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning duct endoscope, comprising a housing (2), characterized in that, The tail of the outer casing (2) is connected to a cable (3). The head of the outer casing (2) is rotatably connected to a hollow rotating rod A (6). Several imaging probes (7) are installed on the head wall of the rotating rod A (6). A motor (20) is fixedly connected to the inner tail wall of the outer casing (2). A mounting base (21) is installed on the head of the motor (20). A rotating rod B (26) is installed on the rotating rod of the motor (20). A linkage part is installed around the rotating rod B (26) on the head of the mounting base (21). The head of the rotating rod B (26) is inserted into the rotating rod A. (6) Inside and connected to the blade (30), the inner side of the outer shell (2) is rotatably mounted with a linkage rod (23), the tail of the two linkage rods (23) is connected to the umbrella disc A (25) with reserved teeth that meshes with the linkage part, the meshing areas of the two umbrella discs A (25) with reserved teeth face different directions, the head of the linkage rod (23) is connected to the gearbox (24) fixed to the inner wall of the outer shell (2), the peripheral tail of the rotating rod A (6) is fixed to the rotating ring A (22) with reserved teeth that is intermittently connected to the two rotating rings B with several teeth; The linkage includes a linkage shell (272) clamped around the circumference of the rotating rod B (26), a pre-toothed umbrella disc B (273) and a pre-toothed umbrella disc C (274) assembled in the linkage shell (272). The head of the linkage shell (272) is open, and the pre-toothed umbrella disc B (273) is rotatably connected to the tail of the linkage shell (272). Inside the pre-toothed umbrella disc B (273) is a stop part that engages with the rotating rod B (26). The pre-toothed umbrella disc C (274)... 74) Two umbrella discs are installed, each mirror-engaged to the side of the umbrella disc B (273) with pre-reserved teeth. The umbrella disc C (274) with pre-reserved teeth is connected to a connecting rod (275) that penetrates the linkage shell (272). The end of the connecting rod (275) opposite to the umbrella disc C (274) with pre-reserved teeth is fixed to the umbrella disc D (276) with pre-reserved teeth. The umbrella disc D (276) with pre-reserved teeth engages with the umbrella disc A (25) with pre-reserved teeth.

2. The self-cleaning duct endoscope according to claim 1, characterized in that: The outer displacement ring of the rotating rod A (6) is connected to the ring-shaped clean plate (8). The outer shell (2) is connected to the electric cylinder A (9) that pulls the clean plate (8) to move. The inner tail wall of the outer shell (2) is equipped with a liquid storage shell (28) in the assembly seat (21). One tail of the liquid storage shell (28) is connected to the connecting channel that is inserted into the head of the clean plate (8). One head of the liquid storage shell (28) is equipped with a repeat drainage part. The outer wall of the rotating rod B (26) is equipped with a repeat ejection part that matches the repeat drainage part.

3. The self-cleaning duct endoscope according to claim 2, characterized in that: The head of the rotating rod A (6) is arched, and the peripheral head of the cleaning plate (8) is pre-set with a protrusion facing away from the center. The head of the electric cylinder A (9) is connected to the tail of the protrusion.

4. The self-cleaning duct endoscope according to claim 2, characterized in that: The repeated drainage section includes a displacement channel fixed to the top of one side of the liquid storage shell (28), a displacement platform (32) installed in the displacement channel, and a spiral beryllium copper wire (31) supporting the displacement platform (32) installed inside the liquid storage shell (28).

5. A self-cleaning duct endoscope according to claim 4, characterized in that: Inside the spiral beryllium copper wire (31) is a traction rod fixed to the inner wall of the liquid storage shell (28), and a check switch connecting the inside and outside of the liquid storage shell (28) is installed on the displacement platform (32).

6. A self-cleaning duct endoscope according to claim 4, characterized in that: The repeating ejection part includes a cam (29) that is clamped around the circumference of the rotating rod B (26) and contacts one end of the displacement stage (32), and a stop part installed inside the cam (29). The tail of the cam (29) is rotated and connected to the rotating rod B (26), and the head of the cam (29) is engaged with the rotating rod B (26) through the stop part.

7. A self-cleaning duct endoscope according to claim 1, characterized in that: The head of the mounting base (21) is mirror-connected to the support rod (33) which is fixed to the tail of the linkage shell (272), and an electric cylinder B (34) is installed at one end of the support rod (33) near the rotating rod B (26).

8. A self-cleaning duct endoscope according to claim 7, characterized in that: The stop part two includes a rotating plate (35) assembled inside the umbrella disc B (273) with pre-reserved teeth, and a displacement rod (36) assembled inside the rotating plate (35) and rotatedly connected to the rotating plate (35). The inner head wall of the umbrella disc B (273) with pre-reserved teeth has a circumferentially evenly arranged embedding hole two. The displacement rod (36) is displaced and clamped to the circumference of the rotating rod B (26). The displacement rod (36) is connected to an embedding hook two that cooperates with the embedding hole two.

9. A self-cleaning duct endoscope according to claim 8, characterized in that: The second embedded hook is connected to one end of the second elastic strip, and the other end of the second elastic strip is connected to the rotating rod B (26). The displacement rod (36) has a displacement groove that cooperates with the rotating rod B (26). The head of the electric cylinder B (34) is fixedly connected to the rotating plate (35).

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