Pipeline inner wall spraying mechanism

Abstract

The invention relates to the technical field of pipeline spraying, in particular to a pipeline inner wall spraying mechanism which comprises a mounting cylinder, a pipe climbing component used for climbing along the inner wall of a pipeline is mounted in the mounting cylinder, a spraying component is mounted at the end of the mounting cylinder, an overflow reducing component is mounted on the spraying component, and an overflow blocking component is mounted on a hood at the tail of the mounting cylinder. According to the invention, the plug structure formed by the overflow preventing part is designed, so that on one hand, the coating sprayed out of the nozzle cannot overflow from the other end of the pipeline, and the phenomenon that the coating overflows or the gas with peculiar smell overflows from the other end of the pipeline is eliminated; and on the other hand, the mounting barrel drives the annular telescopic air bag to clean the inner wall of the pipeline while advancing along the inner wall of the pipeline through the pipe climbing component, the hidden danger that the subsequent spraying effect is poor due to dust attached to the inner wall of the pipeline is reduced, and annular opening adsorption cotton on the overflow reducing component reduces the overflow amount of the coating in an absorption mode.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline spraying, and specifically to a pipeline inner wall spraying mechanism. Background Technique

[0002] Inner wall spraying of pipelines is a common surface treatment technology, mainly used to improve the corrosion resistance, wear resistance of the pipeline inner wall, reduce fluid resistance or achieve specific functions (such as anti-fouling, antibacterial, etc.). In the prior art, a robotic arm or telescopic rod is used to support the equipment to extend a rotating spray head into the pipeline. On the one hand, the robotic arm or telescopic rod is large in size and occupies a lot of space. On the other hand, it is easy to cause the rotating spray head to be non-coaxial with the pipeline, resulting in uneven spraying of one side of the pipeline inner wall during spraying by the rotating spray head, and there is a lack of an effective anti-overflow structure, resulting in a large amount of paint overflowing from the end of the pipeline when the rotating spray head sprays the inner wall of the pipeline, thereby causing environmental pollution outside the pipeline. Summary of the Invention

[0003] The purpose of the present invention is to provide a pipeline inner wall spraying mechanism to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A pipeline inner wall spraying mechanism includes an installation cylinder, a pipe climbing component for climbing along the inner wall of the pipeline is installed in the installation cylinder, and a machine cover is installed at the tail of the installation cylinder; A spraying component is installed at the end of the installation cylinder, and rotary spraying operation on the inner wall of the pipeline is achieved through the spraying component. A spillage reduction component is installed on the spraying component, and a spillage blocking component is installed on the machine cover at the tail of the installation cylinder; The spillage reduction component includes a sliding rod. A positioning disk is fixedly sleeved on the rod body of the sliding rod close to the spraying component, and a number of annularly distributed and rotatably connected main bone plates are installed on the positioning disk. The main bone plates form a conical umbrella bone structure, and a ring-shaped open adsorption cotton is attached to the conical umbrella bone structure. A sliding sleeve is sleeved on the sliding rod and is slidably connected. The cone diameter of the conical umbrella bone structure is adjusted through the sliding sleeve; The spillage blocking component includes an installation disk. An annular expansion airbag is fixedly sleeved on the outer wall of the installation disk, and a silicone rubber ring is fixedly sleeved on the outer airbag surface of the annular expansion airbag. The diameter of the silicone rubber ring is expanded and supported by inflating the annular expansion airbag and abuts against the inner wall of the unsprayed pipeline.

[0005] Preferably, a number of annularly distributed and rotatably connected support rods are installed on the sliding sleeve, and the support rods correspond to the main bone plates one by one. The other end of the support rod is rotatably connected to the middle plate body of the corresponding main bone plate. A threaded through hole is also opened on the sliding sleeve, and a locking screw rod connected by thread is inserted into the threaded through hole.

[0006] Preferably, a plurality of sets of annularly distributed intermediate connecting members are installed on both side surfaces of the mounting disc, and each intermediate connecting member includes a sleeve. The sleeve is fixedly installed on the outer surface of the mounting disc, and a sliding rod is inserted into the sleeve in a slidable connection manner. The head of the sliding rod is fixedly installed on the side wall of the silicone rubber ring.

[0007] Preferably, an annular storage cavity for storing spraying material is formed in the mounting disc, and a feeding valve and a liquid discharge joint which are vertically distributed and communicated with the annular storage cavity are installed on the mounting disc. A plum blossom through cavity is formed at the center of the mounting disc, and an air valve is installed on the annular expansion airbag.

[0008] Preferably, a wear-resistant layer is provided on the outer circumferential surface of the silicone rubber ring.

[0009] Preferably, the spraying component includes a rotating motor. The rotating motor is fixedly installed at the end of the mounting cylinder through a frame, and an output end of the rotating motor is fixedly installed with a rotating housing cover. A liquid supply bottom shell which is rotatably connected is installed at the bottom of the rotating housing cover. A plurality of annularly distributed nozzles are installed on the rotating housing cover. A liquid inlet joint is fixedly installed on the liquid supply bottom shell, and the liquid inlet joint is connected with the liquid discharge joint through a liquid guide pipe.

[0010] Preferably, a protective housing is further fixedly installed on the liquid supply bottom shell, and the protective housing is fixedly installed at the end of the mounting cylinder to cover the rotating motor through the protective housing.

[0011] Preferably, the pipe climbing component includes a lead screw. The lead screw is rotatably installed in the mounting cylinder and is coaxially arranged with the mounting cylinder. Two symmetrically distributed thread segments with opposite thread directions are provided on the lead screw. Each thread segment is sleeved with a threaded sleeve in a threaded connection manner. A plurality of annularly distributed and rotatably connected support plates are installed on each threaded sleeve. The support plates corresponding to each other on the two threaded sleeves form an X-shaped structure, and the cross plates of the two support plates are rotatably connected through a rotating shaft. The two support plates forming the X-shaped structure pass through a cutting cavity formed in the mounting cylinder and extend out of the mounting cylinder, and a fitting wheel which is rotatably connected is installed at the extending end of the support plate. A servo motor is fixedly installed at the tail of the mounting cylinder through a frame, and a connection end of an output end of the servo motor is fixedly connected with the lead screw.

[0012] Preferably, the machine cover is fixedly installed at the tail of the mounting cylinder through screws and covers the servo motor. A plum blossom rod which is coaxially arranged is fixedly installed on the cover head of the machine cover. The plum blossom rod passes through the plum blossom through cavity formed in the mounting disc, and a threaded rod is fixedly installed at the head of the plum blossom rod. A fastening nut which is in threaded connection is sleeved on the threaded rod. A number of annularly distributed raised portions are fixedly fitted on the fastening end of the fastening nut, and the raised portions are abutted against the outer disk surface of the mounting disk on the plum blossom rod.

[0013] Preferably, a docking flange is fixedly installed on the rod head of the sliding rod, and the docking flange is fixedly installed on the cover head of the rotating housing by screws and is coaxially arranged with the rotating housing.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The plug structure formed by the overflow prevention component in the present invention, on the one hand, prevents the paint sprayed from the nozzle from overflowing from the other end of the pipe, eliminating the phenomenon of paint overflow or odor gas overflow at the other end of the pipe. On the other hand, while the installation cylinder travels along the inner wall of the pipe through the pipe climbing component, it drives the annular expansion airbag to clean the inner wall of the pipe, reducing the hidden danger that the dust attached to the inner wall of the pipe causes poor subsequent spraying effect.

[0015] 2. When the nozzle coats the inner wall of the pipe with paint in the present invention, part of the paint scatters outward towards the annular opening adsorption cotton, and the annular opening adsorption cotton reduces the overflow amount of the paint by absorption. Cooperating with the plug structure formed by the overflow prevention component, it greatly reduces the paint overflow from both ends of the pipe, effectively improving the working environment in the workshop.

[0016] 3. In the present invention, the sliding sleeve is linked with the support rod, and the conical opening diameter of the conical umbrella bone structure can be adjusted. The annular expansion airbag can adjust the expansion diameter of the annular expansion airbag through the inflation amount, so as to adapt to different pipe diameters, greatly improving the application range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the inner wall spraying mechanism of the pipe provided by the present invention in the pipe; Figure 2 is a schematic plan view of the inner wall spraying mechanism of the pipe provided by the present invention in the traveling direction in the pipe; Figure 3 is a schematic structural diagram of the inner wall spraying mechanism of the pipe provided by the present invention; Figure 4 is Figure 3 a schematic structural diagram of the pipe climbing component and the machine cover shown; Figure 5 is Figure 3 a schematic structural diagram of the overflow prevention component shown; Figure 6 is Figure 5 a schematic cross-sectional structural diagram of the overflow prevention component shown; Figure 7 is Figure 5 a schematic structural diagram of the intermediate coupling shown; Figure 8For Figure 3 Schematic cross-sectional structure diagram of the spraying component shown; Figure 9 For Figure 3 Schematic installation structure diagram of the liquid guide pipe between the spraying component and the overflow prevention component shown; Figure 10 For Figure 1 Schematic structure diagram of the overflow reduction component shown; Figure 11 Schematic structure diagram when the annular open adsorption cotton provided by the present invention is unfolded; Figure 12 For Figure 11 Schematic structure diagram when the annular open adsorption cotton is curled into an umbrella surface structure shown.

[0018] In the figure: 1. Installation cylinder; 1a. Cutting cavity; 11. Machine cover; 111. Plum blossom rod; 112. Threaded rod; 113. Tightening nut; 2. Pipe climbing component; 21. Lead screw; 22. Threaded sleeve; 23. Support plate; 24. Fitting wheel; 25. Servo motor; 3. Overflow prevention component; 31. Installation disc; 31a. Annular storage cavity; 31b. Plum blossom through cavity; 311. Feed valve; 312. Drainage joint; 32. Annular expansion airbag; 321. Air valve; 33. Silicone rubber ring; 331. Wear-resistant layer; 34. Intermediate connecting piece; 341. Sleeve; 342. Slide bar; 4. Spraying component; 41. Rotating motor; 42. Rotating shell cover; 43. Liquid supply bottom shell; 431. Liquid inlet joint; 432. Protective cover body; 44. Nozzle; 5. Overflow reduction component; 51. Slide bar; 511. Docking flange; 52. Positioning disc; 53. Main bone plate; 54. Slide sleeve; 541. Locking screw; 55. Support rod; 6. Annular open adsorption cotton; 7. Liquid guide pipe. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 12 , a pipeline inner wall spraying mechanism provided by an embodiment of the present invention, the pipeline inner wall spraying mechanism includes an installation cylinder 1, a pipe climbing component 2, an overflow prevention component 3, a spraying component 4, and an overflow reduction component 5.

[0021] In an embodiment of the present invention, please refer to Figure 1 , Figure 2 and Figure 4, a pipe climbing component 2 for climbing along the inner wall of the pipeline is installed in the installation cylinder 1. Specifically, the pipe climbing component 2 includes a lead screw 21. The lead screw 21 is rotatably installed in the installation cylinder 1 and is coaxially arranged with the installation cylinder 1. Two symmetrically distributed thread segments with opposite thread directions are provided on the lead screw 21. A threaded sleeve 22 connected by threads is sleeved on each thread segment. A plurality of annularly distributed and rotatably connected support plates 23 are installed on each threaded sleeve 22. The support plates 23 corresponding to each other on the two threaded sleeves 22 form an X-shaped structure. The cross plates of the two support plates 23 are rotatably connected through a rotating shaft. The two support plates 23 forming the X-shaped structure pass through the cutting cavity 1a opened in the installation cylinder 1 and extend out of the installation cylinder 1. A fitting wheel 24 rotatably connected is installed at the extended end of the support plate 23. A servo motor 25 is fixedly installed at the tail of the installation cylinder 1 through a frame, and the connection end of the output end of the servo motor 25 and the lead screw 21 is fixedly connected.

[0022] It should be noted that: the installation cylinder 1 is placed in the pipeline to be sprayed, and the servo motor 25 is started to drive the lead screw 21 to rotate. Since two thread segments with opposite thread directions are provided on the lead screw 21, the two threaded sleeves 22 on the X-shaped structure slide towards each other along the lead screw 21, so that the support of the two support plates 23 forming the X-shaped structure increases in diameter until the fitting wheel 24 is tightly attached to the inner wall of the pipeline.

[0023] In this application, a motor for driving the fitting wheel 24 to rotate can be installed on any one of the support plates 23, so that the installation cylinder 1 can travel in the pipeline by itself through the pipe climbing component 2, or a traction device (such as a winch or a rail tractor, etc.) can be set outside the pipeline to pull the installation cylinder 1, so that the installation cylinder 1 travels smoothly along the pipeline through the pipe climbing component 2, so as to spray the inner wall of the pipeline by the spraying component 4. The specific power source can be reasonably selected by technicians according to actual needs, and this application does not limit it here.

[0024] Furthermore, a machine cover 11 is installed at the tail of the installation cylinder 1. The machine cover 11 is fixedly installed at the tail of the installation cylinder 1 through screws and covers the servo motor 25. By setting the machine cover 11, the servo motor 25 can be effectively protected to avoid damage to the servo motor 25 caused by spraying materials.

[0025] In the embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 8 and Figure 9, a spraying component 4 is installed at the end of the installation cylinder 1. The spraying component 4 includes a rotating motor 41, which is fixedly installed at the end of the installation cylinder 1 through a frame. The output end of the rotating motor 41 is fixedly installed with a rotating housing 42. A liquid supply bottom shell 43 is rotatably connected to the bottom of the rotating housing 42. A plurality of annularly distributed nozzles 44 are installed on the rotating housing 42, and a liquid inlet joint 431 is fixedly installed on the liquid supply bottom shell 43.

[0026] It should be noted that: for the liquid supply shell structure composed of the rotating housing 42 and the liquid supply bottom shell 43, opening the nozzle 44 can coat the inner wall of the pipeline with the paint in the liquid supply shell structure. By turning on the rotating motor 41 to drive the rotating housing 42 and the annularly distributed nozzles 44, 360° uniform spraying is achieved, improving the consistency of the coating.

[0027] Among them, since the liquid inlet joint 431 is installed on the liquid supply bottom shell 43, and the rotating housing 42 is rotatably connected to the liquid supply bottom shell 43 and the inner cavities are interconnected, the liquid supply shell structure can be fed by a feeding source through the liquid inlet joint 431.

[0028] Furthermore, a protective cover 432 is also fixedly installed on the liquid supply bottom shell 43, and the protective cover 432 is fixedly installed at the end of the installation cylinder 1. By covering the rotating motor 41 with the protective cover 432, on the one hand, the rotating motor 41 can be effectively protected, reducing damage to the rotating motor 41 caused by the paint. On the other hand, the protective cover 432 can enhance the stability and firmness of the installation of the liquid supply shell structure.

[0029] In the embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 [[ID=XX]],a spillage prevention component 3 is installed on the hood 11 at the tail of the installation cylinder 1. The spillage prevention component 3 includes an installation disc 31. An annular expansion airbag 32 is fixedly sleeved on the outer wall of the installation disc 31. A silicone rubber ring 33 is fixedly sleeved on the outer airbag surface of the annular expansion airbag 32. By inflating and expanding the annular expansion airbag 32, the diameter of the silicone rubber ring 33 is expanded and abuts against the inner wall of the unsprayed pipeline. A plum blossom through cavity 31b is opened at the center of the installation disc 31, and an air valve 321 is installed on the annular expansion airbag 32.

[0030] It should be noted that: place the installation cylinder 1 and the spillage prevention component 3 in the pipeline (keep the spillage prevention component 3 on the inner side, as shown in the appendix Figure 2As shown in the figure, the servo motor 25 is pre-activated to drive the fitting wheel 24 to closely fit against the inner wall of the pipeline. Subsequently, the output end of the air pump is connected to the air valve 321 to inflate the annular expansion airbag 32. Therefore, the annular expansion airbag 32 extends and expands axially until the outer wall of the silicone rubber ring 33 abuts against the inner wall of the pipeline, and then the air pump is removed. At this time, the overflow prevention component 3 forms a plug structure for the pipeline. The formed plug structure, on the one hand, prevents the paint sprayed by the nozzle 44 from overflowing from the other end of the pipeline, eliminating the phenomenon of paint overflow or odor gas overflow at the other end of the pipeline. On the other hand, while the installation cylinder 1 travels along the inner wall of the pipeline through the pipe climbing component 2, it drives the annular expansion airbag 32 to clean the inner wall of the pipeline, reducing the hidden danger that the dust attached to the inner wall of the pipeline may cause poor subsequent spraying effect.

[0031] In this solution, since the expanded annular expansion airbag 32 and the silicone rubber ring 33 are elastic structures, in terms of structural form, it can effectively reduce the hidden danger that the plug structure fails to seal the end of the pipeline due to pipeline vibration (or vibration generated when the pipe climbing component 2 travels along the pipeline), and at the same time, it can improve the stability of the installation cylinder 1 when traveling along the pipeline.

[0032] It should be noted that: the outer wall of the annular expansion airbag 32 is selected as the silicone rubber ring 33, which is soft and resistant to repeated stretching. Therefore, it is easy to expand after the annular expansion airbag 32 is inflated, and it is resistant to high and low temperatures and anti-aging, suitable for long-term use.

[0033] In this solution, an annular storage cavity 31a for storing spraying material is opened in the installation disk 31, and a feeding valve 311 and a liquid discharge joint 312 are installed on the installation disk 31 and are distributed up and down and communicated with the annular storage cavity 31a. The liquid discharge joint 312 is connected to the liquid inlet joint 431 through a liquid guide pipe 7. By setting the annular storage cavity 31a in the installation disk 31, the tail of the installation cylinder 1 can carry the spraying material by itself and travel along the pipeline for spraying, so that there is no need to additionally set up feeding equipment outside the pipeline. In order to ensure the stability of the annular storage cavity 31a for feeding the nozzle 44, a pump body for transporting the spraying material can be added in the annular storage cavity 31a.

[0034] Among them, a wear-resistant layer 331 is provided on the outer surface of the silicone rubber ring 33, thereby improving the service life of the silicone rubber ring 33. The wear-resistant layer 331 can be a polyurethane (PU) coating or a fluorocarbon (PTFE / PFA) composite coating (or other designs). The wear-resistant layer 331 on the silicone rubber ring 33 is regularly detected by the staff. When the wear-resistant layer 331 is damaged, the staff can repair it or replace the silicone rubber ring 33.

[0035] Furthermore, multiple groups of annularly distributed intermediate connectors 34 are installed on both side surfaces of the mounting disc 31. The intermediate connector 34 includes a sleeve 341 which is fixedly installed on the outer surface of the mounting disc 31. A sliding rod 342 is inserted into the sleeve 341 in a slidable connection manner, and the rod head of the sliding rod 342 is fixedly installed on the side wall of the silicone rubber ring 33. When the annular expansion airbag 32 is inflated and extends and expands axially, the sliding rod 342 slides outward along the sleeve 341, which not only improves the stability of the annular expansion airbag 32 extending and expanding axially, but also can avoid the hidden danger that the annular expansion airbag 32 is axially side-offset along the inner wall of the pipeline when moving along the inner wall of the pipeline.

[0036] In an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 , a plum blossom rod 111 arranged coaxially is fixedly installed on the hood head of the hood 11. The plum blossom rod 111 passes through a plum blossom through cavity 31b opened on the mounting disc 31, and a threaded rod 112 is fixedly installed on the rod head of the plum blossom rod 111. A fastening nut 113 in threaded connection is sleeved on the threaded rod 112, and a plurality of annularly distributed protruding parts are fixedly embedded on the fastening end of the fastening nut 113, and the outer surface of the mounting disc 31 on the plum blossom rod 111 is abutted by the protruding parts.

[0037] It should be noted that when installing the overflow prevention component 3, the mounting disc 31 is sleeved on the plum blossom rod 111 by using the plum blossom through cavity 31b opened on the mounting disc 31, and then the fastening nut 113 is installed on the threaded rod 112 and tightened, so that the protruding parts on the fastening nut 113 can firmly abut against the outer wall of the mounting disc 31; When the spraying mechanism is not needed, the overflow prevention component 3 can be removed from the plum blossom rod 111 after unscrewing the fastening nut 113, thereby reducing the volume of the spraying mechanism and facilitating its storage and maintenance.

[0038] In an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 10 , Figure 11 and Figure 12, an overflow reduction component 5 is installed on the spraying component 4, and the overflow reduction component 5 includes a sliding rod 51, a docking flange 511 is fixedly installed on the rod head of the sliding rod 51, and the docking flange 511 is fixedly installed on the cover head of the rotating shell 42 by screws and is coaxially arranged with the rotating shell 42, the sliding rod 51 is fixedly sleeved with a positioning plate 52 on the rod body close to the spraying component 4, and a plurality of annularly distributed and rotatably connected main bone plates 53 are installed on the positioning plate 52, the main bone plates 53 constitute a conical umbrella rib structure, and the conical umbrella rib structure is fitted with an annular opening adsorption cotton 6, a sliding sleeve 54 is sleeved on the sliding rod 51 for sliding connection, and the diameter of the cone mouth of the conical umbrella rib structure is adjusted by the sliding sleeve 54; A plurality of support rods 55 distributed in an annular manner and rotatably connected are installed on the sliding sleeve 54, and the support rods 55 correspond to the main bone plates 53 one by one. The other end of the support rod 55 is rotatably connected to the middle plate body of the corresponding main bone plate 53. A threaded through hole is also provided on the sliding sleeve 54, and a threaded locking screw 541 is inserted into the threaded through hole.

[0039] It should be noted that before installing the overflow reduction component 5 on the cover head of the rotating shell 42, the sliding sleeve 54 is slid along the sliding rod 51 toward the installation tube 1. The sliding rod 51 can support the rod 55 to open the main bone plates 53, so that the annular main bone plates 53 form a conical umbrella rib structure. After the taper diameter of the tail of the conical umbrella rib structure is kept smaller than the inner diameter of the pipe by 1-2 cm, the locking screw 541 is tightened to lock the sliding sleeve 54 in position. When the fitting wheel 24 is tightly fitted to the inner wall of the pipe and the annular telescopic airbag 32 is inflated to make the overflow-proof component 3 form a plug structure of the pipe, the annular opening adsorption cotton 6 is fixedly installed on the conical surface of the conical umbrella structure. After completion, the docking flange 511 is fixed to the cover head of the rotating shell 42 (as shown in the attached figure). Figure 2 shown).

[0040] It should also be noted that: when installing the overflow reduction component 5, keep the nozzle 44 facing the pipe mouth on one side of the pipeline. At this time, the overflow reduction component 5 is located outside the pipeline. When the installation tube 1 moves along the pipeline, the overflow reduction component 5 slides into the pipeline. When the nozzle 44 applies paint to the inner wall of the pipeline, part of the paint disperses toward the annular opening adsorption cotton 6, and the annular opening adsorption cotton 6 reduces the amount of paint overflow by absorption. Combined with the plug structure formed by the overflow prevention component 3, it greatly reduces the overflow of paint from both ends of the pipeline, effectively improving the working environment of the workshop.

[0041] It is worth noting that: since the diameter of the cone opening at the tail of the conical rib structure is 1-2 cm smaller than the inner diameter of the pipe, the conical rib structure formed by the main rib plate 53 will not affect the coating sprayed on the inner wall of the pipe when it moves along the pipe.

[0042] Among them, the annular opening adsorption cotton 6 can be installed by means of solid glue bonding or by using screws to fix it on the main bone plate 53. After spraying the inner wall of each pipe, a new annular opening adsorption cotton 6 can be replaced.

[0043] In this application, the sliding sleeve 54 is linked with the support rod 55, and the cone diameter of the conical umbrella bone structure can be adjusted. The extension diameter of the annular expansion airbag 32 can be adjusted by the inflation amount, so that different pipe diameters can be adapted, greatly improving the application range of the equipment.

[0044] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A pipeline inner wall spraying mechanism, including an installation cylinder (1). A pipe climbing component (2) for climbing along the inner wall of the pipeline is installed inside the installation cylinder (1), and a machine cover (11) is installed at the tail of the installation cylinder (1). It is characterized in that: A spraying component (4) is installed at the end of the installation cylinder (1), and rotary spraying operation on the inner wall of the pipeline is realized through the spraying component (4). A overflow reducing component (5) is installed on the spraying component (4), and a overflow blocking component (3) is installed on the machine cover (11) at the tail of the installation cylinder (1); The overflow reducing component (5) includes a sliding rod (51). A positioning disk (52) is fixedly sleeved on the rod body of the sliding rod (51) close to the spraying component (4). A number of annularly distributed and rotatably connected main bone plates (53) are installed on the positioning disk (52). The main bone plates (53) form a conical umbrella bone structure, and a ring-shaped open adsorption cotton (6) is attached to the conical umbrella bone structure. A sliding sleeve (54) is sleeved on the sliding rod (51) in a sliding connection manner, and the conical opening diameter of the conical umbrella bone structure is adjusted through the sliding sleeve (54); The overflow blocking component (3) includes an installation disk (31). An annular expansion airbag (32) is fixedly sleeved on the outer peripheral wall of the installation disk (31), and a silicone rubber ring (33) is fixedly sleeved on the outer airbag surface of the annular expansion airbag (32). The diameter of the silicone rubber ring (33) is expanded and propped against the inner wall of the unsprayed pipeline by inflating and expanding the annular expansion airbag (32).

2. The pipeline inner wall spraying mechanism according to claim 1, characterized in that: A number of annularly distributed and rotatably connected support rods (55) are installed on the sliding sleeve (54), and the support rods (55) correspond to the main bone plates (53) one by one. The other end of the support rod (55) is rotatably connected to the middle plate body of the corresponding main bone plate (53). A threaded through hole is also opened on the sliding sleeve (54), and a locking screw rod (541) in threaded connection is inserted into the threaded through hole.

3. The pipeline inner wall spraying mechanism according to claim 1, characterized in that: Multiple groups of annularly distributed intermediate connecting components (34) are installed on both disk surfaces of the installation disk (31). The intermediate connecting component (34) includes a sleeve (341). The sleeve (341) is fixedly installed on the outer disk surface of the installation disk (31), and a sliding rod (342) in sliding connection is inserted into the sleeve (341). The rod head of the sliding rod (342) is fixedly installed on the side wall of the silicone rubber ring (33).

4. The pipeline inner wall spraying mechanism according to claim 3, characterized in that: An annular storage cavity (31a) for storing spraying material is opened in the installation disk (31), and a feed valve (311) and a liquid discharge joint (312) which are distributed up and down and communicated with the annular storage cavity (31a) are installed on the installation disk (31); A plum blossom through cavity (31b) is opened at the center of the disk of the installation disk (31), and an air valve (321) is installed on the annular expansion airbag (32).

5. The pipeline inner wall spraying mechanism according to claim 1, characterized in that: A wear-resistant layer (331) is arranged on the outer peripheral surface of the silicone rubber ring (33).

6. The pipeline inner wall spraying mechanism according to claim 4, characterized in that: The spraying component (4) includes a rotary motor (41). The rotary motor (41) is fixedly installed at the end of the mounting cylinder (1) through a frame, and a rotary housing (42) is fixedly installed at the output end of the rotary motor (41). A liquid supply bottom shell (43) is rotatably connected to the bottom of the rotary housing (42). A plurality of annularly distributed nozzles (44) are installed on the rotary housing (42). A liquid inlet joint (431) is fixedly installed on the liquid supply bottom shell (43), and the liquid inlet joint (431) is connected to a liquid discharge joint (312) through a liquid guide pipe (7).

7. The pipeline inner wall spraying mechanism according to claim 6, characterized in that: A protective housing body (432) is also fixedly installed on the liquid supply bottom shell (43), and the protective housing body (432) is fixedly installed at the end of the mounting cylinder (1) to cover the rotary motor (41).

8. The pipeline inner wall spraying mechanism according to claim 4, characterized in that: The pipe climbing component (2) includes a lead screw (21). The lead screw (21) is rotatably installed in the mounting cylinder (1) and is coaxially arranged with the mounting cylinder (1). Two symmetrically distributed thread segments with opposite thread directions are provided on the lead screw (21). A threaded sleeve (22) in threaded connection is sleeved on each thread segment. A plurality of annularly distributed and rotatably connected support plates (23) are installed on each threaded sleeve (22). The support plates (23) corresponding to each other on the two threaded sleeves (22) form an X-shaped structure. The cross plates of the two support plates (23) are rotatably connected through a rotating shaft. The two support plates (23) constituting the X-shaped structure pass through a cutting cavity (1a) opened on the mounting cylinder (1) and extend out of the mounting cylinder (1), and a rotatably connected fitting wheel (24) is installed at the extended end of the support plate (23). A servo motor (25) is fixedly installed at the tail of the mounting cylinder (1) through a frame, and the connection end of the output end of the servo motor (25) is fixedly connected to the lead screw (21).

9. The pipeline inner wall spraying mechanism according to claim 8, wherein: The machine cover (11) is fixedly installed at the tail of the mounting cylinder (1) through screws and covers the servo motor (25). A coaxial plum blossom rod (111) is fixedly installed on the cover head of the machine cover (11). The plum blossom rod (111) passes through a plum blossom through cavity (31b) opened on the mounting disc (31), and a threaded rod (112) is fixedly installed on the rod head of the plum blossom rod (111). A fastening nut (113) in threaded connection is sleeved on the threaded rod (112). A plurality of annularly distributed convex portions are fixedly embedded on the fastening end of the fastening nut (113), and the outer disc surface of the mounting disc (31) on the plum blossom rod (111) is abutted by the convex portions.

10. The pipeline inner wall spraying mechanism according to claim 6, characterized in that: A docking flange (511) is fixedly installed on the rod head of the sliding rod (51), and the docking flange (511) is fixedly installed on the cover head of the rotary housing (42) through screws and is coaxially arranged with the rotary housing (42).

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