Spraying device for pipeline in-situ repair

Abstract

The invention relates to the technical field of pipeline repair, and discloses a spraying device for pipeline in-situ repair, which comprises a rotating mechanism, a spraying mechanism and an outer supporting mechanism, after the outer supporting mechanism supports the inner side of a pipeline, the rotating mechanism drives the spraying mechanism to perform rotary spraying on the inner wall of the pipeline, and the spraying device further comprises a drying mechanism, an inner supporting mechanism and a transmission mechanism, the rotating mechanism drives the drying mechanism to rotate, the outer supporting mechanism and the inner supporting mechanism alternately support the inner wall of the pipeline, the drying mechanism is arranged on the inner side of the inner supporting mechanism, and the transmission mechanism enables the inner supporting mechanism to support through rotation of the drying mechanism. And a driving mechanism for driving the drying mechanism, the inner supporting mechanism and the transmission mechanism to axially move on the inner side of the outer supporting mechanism is arranged on the outer supporting mechanism. And the combination of fixed-point drying, rotary spraying and alternate supporting walking is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline repair, and specifically refers to a spraying device for in-situ pipeline repair. Background Art

[0002] In-situ pipeline repair is a technology for repairing damaged or aging pipelines without large-scale excavation and pipeline disassembly. Its core lies in completing the repair operation inside the pipeline through specific equipment and processes, minimizing the impact on the surrounding environment, traffic, and residents' lives, especially suitable for scenarios such as urban underground pipe networks where excavation is difficult.

[0003] Common in-situ repair technologies include lining repair method, spiral winding method, slip lining method, spraying repair method, and pipe bursting method. Among them, the spraying repair method is widely used due to its characteristics of fast construction and low cost. Epoxy resin, cement mortar, or polyurethane is sprayed on the inner wall of the pipeline through a rotating nozzle to form a protective layer. In the urban water supply pipeline repair industry, after long-term use of the water supply pipeline, the inner wall will gradually deteriorate due to physical, chemical, and biological effects, affecting water quality and water conveyance efficiency. After the pipeline is cleaned, it needs to be recoated. When spraying epoxy resin or other protective layer materials, the inner wall of the pipeline must be kept dry, which is a key condition to ensure the adhesion of the coating and the repair effect. However, in the humid environment of underground pipelines and poor ventilation conditions, especially the common pipeline condensation phenomenon, it is very difficult to ensure the dryness of the inner wall of the rear-section pipeline during the spraying operation. Moreover, the existing spraying devices rely on roller-type walking mechanisms, and the rotation torque during spraying is likely to cause the rollers to slip, which not only affects the uniformity of the coating but also may damage the already sprayed surface. The probability of slipping is significantly increased especially on the smooth coating surface, becoming a potential hazard point for coating peeling. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a spraying device for in-situ pipeline repair.

[0005] To solve the above technical problem, the technical solution provided by the present invention is: A spraying device for in-situ pipeline repair, including a rotating mechanism, a spraying mechanism, and an outer support mechanism. After the outer support mechanism supports inside the pipeline, the rotating mechanism drives the spraying mechanism to perform rotary spraying on the inner wall of the pipeline; It further includes a drying mechanism, an inner support mechanism, and a transmission mechanism. The rotating mechanism includes a rotating shaft. The drying mechanism includes a rotating sleeve sleeved on the rotating shaft. The rotating shaft drives the rotating sleeve to rotate. At both ends of the rotating sleeve, there are respectively a first rotating table and a second rotating table that rotate and slide with the rotating shaft. A plurality of fan blades are arranged on the outer side of the rotating sleeve; The outer support mechanism and the inner support mechanism alternately support the inner side of the pipeline. A driving mechanism is provided on the outer support mechanism, and the driving mechanism drives the outer support mechanism and the inner support mechanism to alternately move horizontally. The transmission mechanism converts the torque of the drying mechanism into the supporting driving force of the inner support mechanism.

[0006] As an improvement: The outer support mechanism includes two fixed ring platforms rotatably connected to both ends of the rotating shaft. A plurality of outer support rods are provided on the outer side of the fixed ring platform, and a telescopic support plate one is provided at the end of the outer support rod. The inner support mechanism includes a moving ring platform one and a moving ring platform two. A plurality of inner support rods are provided on the outer sides of the moving ring platform one and the moving ring platform two, and a telescopic support plate two is provided at the end of the inner support rod. The support plate one and the support plate two are arranged in a staggered manner. The transmission mechanism is connected to the moving ring platform one and the turntable one, and the moving ring platform two is rotatably connected to the turntable two.

[0007] As an improvement: The transmission mechanism includes a connecting platform and a transmission plate. The connecting platform is fixedly connected to the moving ring platform one. Both ends of the transmission plate are respectively rotatably connected to the connecting platform and the turntable one. An outer ring platform is provided on the connecting platform, and an arc-shaped groove is provided on the outer ring platform. A slider that is slidably matched with the arc-shaped groove is provided on the rear side of the transmission plate. A spring two is provided between the slider and the arc-shaped groove. A friction ring is provided at the front end of the transmission plate, and a plurality of friction sheets that cooperate with the friction ring are provided on the turntable one.

[0008] As an improvement: A chute is provided on the inner support rod. A sliding column two and an adjusting block are slidably arranged in the chute. The sliding column two is connected to the support plate two. A spring one is provided between the adjusting block and the chute. A transmission platform is provided on the outer side of the inner support rod. Two connecting rods are hinged on the transmission platform, and the two connecting rods are respectively hinged to the sliding column two and the adjusting block. A transmission shaft is connected between the transmission platforms corresponding to both sides of the transmission plate, and the transmission shaft passes through the adjusting hole platform on the transmission plate.

[0009] As an improvement: The driving mechanism includes a motor two and a driving rod. The output end of the motor two is connected to the driving rod. A fixed frame one is provided between the adjacent outer support rods at the top. The motor two is installed on the fixed frame one. The driving rod is rotatably arranged between the two fixed frame ones. Two sections of external threads are provided on the driving rod. A fixed frame two is provided between the adjacent inner support rods at the top. A threaded hole that cooperates with the external thread is provided on the fixed frame two. A positioning rod that is slidably matched with the through hole on the fixed frame one is provided on the fixed frame two.

[0010] As an improvement: A sliding column one connected to the support plate one is slidably arranged on the outer support rod. Cylinders one are provided on both sides of the fixed ring platform. The output end of the cylinder one is provided with a push plate, a straight groove opening is provided on the push plate, and a sliding shaft that is slidably matched with the straight groove opening is provided on the sliding column one.

[0011] As an improvement: Baffles are provided at both ends of the rotating sleeve. A plurality of fan blades are evenly arranged between the two baffles. Heating strips are provided on the outer side of the rotating sleeve. Ventilation holes that communicate with the inner cavity of the fan blades are provided on the inner sides of the turntable one and the turntable two. The gaps between the plurality of friction sheets on the turntable one communicate with the ventilation holes. An air inlet hole that communicates with the ventilation holes is provided on the outer side of the turntable two.

[0012] As an improvement: The rotating mechanism further includes a first motor installed at the bottom of the outer support rod. The first motor drives the rotating shaft to rotate. A spline shaft is provided in the middle section of the rotating shaft, and a spline groove matching the spline shaft is provided inside the rotating sleeve.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: Through mechanical structure innovation and multi-functional integration, the present invention effectively solves the problems of efficiency, quality, and reliability in traditional pipeline repair, and realizes the combination of fixed-point drying, rotary spraying, and alternating support walking. Specifically: 1. The spraying mechanism and the drying mechanism are driven by the rotating mechanism to work synchronously. The sprayed coating can immediately be affected by the hot air generated by the drying mechanism, significantly shortening the drying time of the coating and avoiding the low efficiency problem caused by the long drying time of traditional spraying devices. It is especially suitable for the repair operation of large-diameter pipelines. 2. By adopting the method of alternately supporting the inner wall of the pipeline with the outer support mechanism and the inner support mechanism, the problem that the traditional roller walking mechanism is prone to slipping during rotary spraying is completely solved. This design not only protects the sprayed coating from damage but also ensures the uniformity of the spraying thickness, improving the repair quality. 3. The transmission mechanism converts the rotational power into the radial support action of the inner support mechanism through the cooperation of the friction plate and the friction ring. The structure is simple and highly reliable. The pre-tightening force design of the spring avoids over-compressing the inner wall of the pipeline while ensuring the stability of the support force. 4. The drying mechanism generates hot air through the fan blades and heating strips, and at the same time uses the ventilation holes and gaps to form an air flow cycle, which not only accelerates the curing of the coating but also cools key components such as the friction ring, extending the service life of the equipment. The hot air can also preheat the area to be sprayed, further improving the overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the structural schematic diagram of the present invention Figure 1 .

[0015] Figure 2 is the structural schematic diagram of the present invention Figure 2 .

[0016] Figure 3 is the exploded view of the present invention.

[0017] Figure 4 is the cross-sectional view of the present invention.

[0018] Figure 5 is the structural schematic diagram of the rotating mechanism and the spraying mechanism of the present invention.

[0019] Figure 6 is the structural schematic diagram of the drying mechanism of the present invention.

[0020] Figure 7 is a cross-section of the drying mechanism of the present invention Figure 1 .

[0021] Figure 8 is a cross-section of the drying mechanism of the present invention Figure 2 .

[0022] Figure 9 is a schematic structural diagram of the outer support mechanism of the present invention.

[0023] Figure 10 is a schematic partial structural diagram of the outer support mechanism of the present invention.

[0024] Figure 11 is a schematic structural diagram of the inner support mechanism of the present invention.

[0025] Figure 12 is a schematic partial structural diagram of the inner support mechanism of the present invention.

[0026] Figure 13 is an explosion diagram of the transmission mechanism of the present invention Figure 1 .

[0027] Figure 14 is an explosion diagram of the transmission mechanism of the present invention Figure 2 .

[0028] As shown in the figure: 1. Rotating mechanism; 2. Spraying mechanism; 3. Drying mechanism; 4. Outer support mechanism; 5. Inner support mechanism; 6. Transmission mechanism; 11. Motor 1; 12. Gear 1; 13. Rotating shaft; 14. Gear 2; 15. Spline shaft; 21. Feeding pipe; 22. Material distribution table; 23. Nozzle; 31. Rotating sleeve; 311. Spline groove; 312. Heating strip; 32. Turntable 1; 321. Friction plate; 322. Vent hole; 33. Turntable 2; 331. Air inlet hole; 34. Fan blade; 35. Baffle; 41. Fixed ring platform; 42. Outer support rod; 421. Positioning platform; 422. Fixed frame 1; 423. Fixed seat; 43. Slide column 1; 431. Slide shaft; 44. Support plate 1; 45. Cylinder 1; 46. Push plate; 461. Push block; 462. Straight groove; 47. Driving mechanism; 471. Motor 2; 472. Driving rod; 473. External thread; 51. Moving ring platform 1; 52. Moving ring platform 2; 53. Inner support rod; 531. Slide groove; 54. Slide column 2; 55. Support plate 2; 56. Adjusting block; 561. Spring 1; 57. Transmission platform; 571. Connecting rod; 58. Transmission shaft; 59. Fixed frame 2; 591. Positioning rod; 61. Connecting platform; 611. Outer ring platform; 612. Arc groove; 613. Spring 2; 62. Transmission plate; 621. Slide block; 622. Adjusting hole platform; 623. Friction ring; 624. Claw platform. Detailed implementation manners

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Combined with the attached Figure 1 and the attached Figure 3 As shown, a spraying device for in-situ repair of pipelines includes a rotating mechanism 1, a spraying mechanism 2, and an outer support mechanism 4. After the outer support mechanism 4 supports the inside of the pipeline, the rotating mechanism 1 drives the spraying mechanism 2 to rotate and spray the inner wall of the pipeline. It also includes a drying mechanism 3, an inner support mechanism 5, and a transmission mechanism 6. The rotating mechanism 1 drives the drying mechanism 3 to rotate. The outer support mechanism 4 and the inner support mechanism 5 alternately support the inner wall of the pipeline. The drying mechanism 3 is arranged inside the inner support mechanism 5. The transmission mechanism 6 enables the inner support mechanism 5 to support by the rotation of the drying mechanism 3. A driving mechanism 47 for axially moving the drying mechanism 3, the inner support mechanism 5, and the transmission mechanism 6 inside the outer support mechanism 4 is provided on the outer support mechanism 4.

[0031] Combined with the attached Figure 5 As shown, the rotating mechanism 1 includes a motor 11 and a rotating shaft 13. The motor 11 is installed on the outer support mechanism 4. A gear 12 is provided at the output end of the motor 11. A gear 14 meshing with the gear 12 is provided at one end of the rotating shaft 13. The spraying mechanism 2 includes a feed pipe 21. The feed pipe 21 is arranged inside the rotating shaft 13. A distribution table 22 is provided at the end of the feed pipe 21. A plurality of nozzles 23 are evenly arranged on the outside of the distribution table 22.

[0032] Combined with the attached Figure 4 、the attached Figure 6 、the attached Figure 7 and the attached Figure 8 As shown, the drying mechanism 3 includes a rotating sleeve 31. A spline shaft 15 is provided at the middle section of the rotating shaft 13. A spline groove 311 matching with the spline shaft 15 is provided inside the rotating sleeve 31. A first turntable 32 and a second turntable 33 that rotate and slide with the rotating shaft 13 are respectively provided at both ends of the rotating sleeve 31. A plurality of fan blades 34 are provided on the outside of the rotating sleeve 31. Baffles 35 are provided at both ends of the rotating sleeve 31. A plurality of fan blades 34 are evenly arranged between the two baffles 35. A heating strip 312 is provided on the outside of the rotating sleeve 31. Vent holes 322 communicating with the inner cavity of the fan blades 34 are provided inside both the first turntable 32 and the second turntable 33. The gaps between a plurality of friction plates 321 on the first turntable 32 communicate with the vent holes 322. An air inlet hole 331 communicating with the vent holes 322 is provided on the outside of the second turntable 33.

[0033] Traditional spraying devices for in-situ pipeline repair have a traveling mechanism and a spraying mechanism. The traveling mechanism consists of rollers with adjustable radial height, and the spraying mechanism has a rotatable nozzle. However, in actual applications, it is found that the spraying operation for large-diameter pipelines is time-consuming. On the one hand, because the pipeline size is large and the spraying area is large. On the other hand, the drying work before pipeline spraying is time-consuming, and since multiple layers of coatings need to be sprayed, the drying time of the previous coating is relatively long, resulting in low efficiency of the spraying operation for large-diameter pipelines.

[0034] To solve the above problems, this device has improved the rotating mechanism 1 and the spraying mechanism 2, and added a drying mechanism 3. During operation, after the first motor 11 is started, the first gear 12 drives the second gear 14 to rotate, thereby driving the rotating shaft 13 to rotate around its own axis. The rotating shaft 13, as the core transmission component, is simultaneously connected to the spraying mechanism 2 and the drying mechanism 3 to achieve synchronous rotation of the two.

[0035] The repair material is conveyed to the material distribution table 22 through the feeding pipe 21. Driven by the rotating shaft 13, the material distribution table 22 rotates synchronously with the nozzle 23. The material is ejected from the nozzle 23 under the action of centrifugal force or pressure to form an annular spray, evenly covering the inner wall of the pipeline.

[0036] The rotating shaft 13 drives the rotating sleeve 31 to rotate synchronously through the spline shaft 15, and the fan blades 34 rotate accordingly to generate a radial air flow. External air enters from the air inlet hole 331, flows through the ventilation hole 322 to the area of the fan blades 34, is heated by the heating strip 312 to form hot air, and blows towards the semi-dry coating between the two baffles 35 on the inner wall of the pipeline to accelerate the evaporation of moisture or the curing of the material. The hot air between the baffles 35 will also flow through the gap to the spraying area at the rear and the unsprayed pipeline at the front. The former will cause the sprayed repair material to cure quickly, otherwise it is prone to sag under the influence of gravity, and the humid environment will prolong the drying time. The latter will preheat and dry in advance to accelerate the drying efficiency.

[0037] Combined with the attached Figure 9 and the attached Figure 10 As shown, the outer support mechanism 4 includes two fixed ring platforms 41 rotatably connected to both ends of the rotating shaft 13. A plurality of outer support rods 42 are provided on the outer side of the fixed ring platform 41. A sliding column 43 is slidably provided on the outer support rod 42. A support plate 44 is provided at the end of the sliding column 43. Cylinders 45 are provided on both sides of the fixed ring platform 41. The output end of the cylinder 45 is provided with a push plate 46. A push block 461 is provided at the rear of the push plate 46. A positioning table 421 slidably engaged with the push block 461 is provided on the outer support rod 42. A straight slot 462 is provided on the push plate 46. A sliding shaft 431 slidably engaged with the straight slot 462 is provided on the sliding column 43. A fixed seat 423 for fixing the first motor 11 is provided on the outer support rod 42.

[0038] Combined with the attached Figure 4 、the attached Figure 11 、the attachedFigure 12 and the attached Figure 13 As shown, the inner support mechanism 5 includes a first moving ring platform 51 and a second moving ring platform 52. The first moving ring platform 51 and the second moving ring platform 52 are respectively arranged on both sides of the drying mechanism 3. A plurality of inner support rods 53 are arranged on the outer sides of the first moving ring platform 51 and the second moving ring platform 52. The end of the inner support rod 53 is provided with a telescopic second support plate 55. The first moving ring platform 51 is fixedly connected to the connecting platform 61, and the second moving ring platform 52 is rotatably connected to the second rotating platform 33. A sliding groove 531 is provided on the inner support rod 53. A second sliding column 54 and an adjusting block 56 are slidably arranged in the sliding groove 531. The second sliding column 54 is connected to the second support plate 55. A first spring 561 is arranged between the adjusting block 56 and the sliding groove 531. A transmission platform 57 is arranged on the outer side of the inner support rod 53. Two connecting rods 571 are hinged on the transmission platform 57. The two connecting rods 571 are respectively hinged to the second sliding column 54 and the adjusting block 56. A transmission shaft 58 is connected between the transmission platforms 57 corresponding to both sides of the transmission plate 62. The transmission shaft 58 passes through the adjusting hole platform 622 on the transmission plate 62.

[0039] Combined with the attached Figure 2 , the attached Figure 9 , the attached Figure 10 and the attached Figure 12 As shown, the driving mechanism 47 includes a second motor 471 and a driving rod 472. The output end of the second motor 471 is connected to the driving rod 472. A first fixing frame 422 is arranged between the adjacent outer support rods 42 at the top. The second motor 471 is installed on the first fixing frame 422. The driving rod 472 is rotatably arranged between the two first fixing frames 422. Two sections of external threads 473 are arranged on the driving rod 472. A second fixing frame 59 is arranged between the adjacent inner support rods 53 at the top. A threaded hole matching with the external thread 473 is arranged on the second fixing frame 59. A positioning rod 591 which is slidably matched with the through hole on the first fixing frame 422 is arranged on the second fixing frame 59.

[0040] The torque generated by the rotational movement of the spraying mechanism will cause the rollers of the traveling mechanism to slip. To avoid this problem, usually the rotational speed of the spraying mechanism is reduced, but this will result in uneven coating thickness, and the slipping of the rollers will affect the inner wall of the pipeline. Especially when performing the second coating spraying operation, the smooth coating surface will increase the probability of roller slipping, and the slipping rollers will damage the coating, affecting the uniformity of the coating. In the subsequent use process, this will also be the location where the coating peels off first.

[0041] To solve the above problems, the moving structure of the device is improved, and an outer support mechanism 4 and an inner support mechanism 5 are proposed. The two structures realize the support for the inner wall of the pipeline through the alternating radial movement of the first support plate 44 and the second support plate 55. The driving mechanism 47 is used to make the outer support mechanism 4 and the inner support mechanism 5 move alternately, realizing the combination of alternating movement and fixed support, effectively solving the problem of roller slipping, and thus protecting the coating.

[0042] In terms of the moving mode, the outer support mechanism 4 first supports the pipeline. The first cylinder 45 pushes the push plate 46 forward. The push block 461 slides radially on the positioning table 421. The straight slot 462 forces the sliding shaft 431 to move along the slot, driving the first sliding column 43 to extend outwards. The first supporting plate 44 contacts and presses against the inner wall of the pipeline, and supports through multiple first supporting plates 44.

[0043] The second motor 471 drives the driving rod 472 to rotate, and the two external threads 473 rotate synchronously. Through the cooperation with the threaded holes on the second fixing frame 59, it drives the inner support mechanism 5 to move inside the outer support mechanism 4. The inner support mechanism 5 drives the drying mechanism 3 and the transmission mechanism 6 to move, so as to change the drying area of the drying mechanism 3.

[0044] After the movement of the inner support mechanism 5 ends, the rotating mechanism 1 works to rotate the drying mechanism 3. The transmission mechanism 6 makes the transmission plate 62 rotate a certain angle through the frictional resistance. It drives the transmission shaft 58 to rotate a certain angle around the axis of the transmission plate 62 through the adjustment hole platform 622, so that the transmission platforms 57 at both ends of the transmission shaft 58 move towards the direction close to the inner support rod 53. It pushes the second sliding column 54 to slide in the sliding groove 531 through the connecting rod 571, so that the second supporting plate 55 contacts and presses against the inner wall of the pipeline, and supports through multiple second supporting plates 55. During this process, the adjustment block 56 and the first spring 561 play an adjustment role. On the one hand, it can avoid excessive pressing of the second supporting plate 55 against the inner wall of the pipeline. On the other hand, it adjusts the rotation axis of the connecting rod 571, so that the transmission platform 57 can push the adjustment block 56 to move through the connecting rod 571.

[0045] After the inner support mechanism 5 finishes supporting, the outer support mechanism 4 moves. First, the first cylinder 45 drives the push plate 46 to reset, so that the first supporting plate 44 retracts, ending the support for the inner wall of the pipeline. Subsequently, it is driven by the driving mechanism 47. Since the position of the inner support mechanism 5 is fixed at this time, the rotation of the driving rod 472 will push the outer support mechanism 4 to move axially. Since both ends of the rotating shaft 13 are connected to the fixed ring platform 41, the rotating mechanism 1 and the spraying mechanism 2 move synchronously with the outer support mechanism 4.

[0046] In terms of the drying and spraying operations during the movement, when the inner support mechanism 5 moves, the rotating shaft 13 stops rotating and the drying and spraying operations are not carried out. When the outer support mechanism 4 moves, the rotating shaft 13 rotates and the drying and spraying operations are carried out synchronously. Through the cooperation of the spline shaft 15 and the spline groove 311, when the rotating shaft 13 rotates and axially moves, it will still drive the drying mechanism to rotate. Furthermore, through the transmission mechanism 6, the inner support mechanism 5 is supported. The first fixing frame 422 and the second fixing frame 59 are in limit cooperation through the positioning rod 591 to prevent the rotating mechanism 1, the spraying mechanism 2, and the outer support mechanism 4 from rotating self, ensuring the rotation of the drying mechanism 3. During the movement of the rotating mechanism 1 and the spraying mechanism 2, the rotating shaft 13 drives the material distribution table 22 and multiple nozzles 23 to rotate, performing rotary spraying operations to ensure the uniformity of the coating.

[0047] Combined with the attached Figure 4 、attached Figure 13 and attached Figure 14 As shown, the transmission mechanism 6 includes a connecting platform 61 and a transmission plate 62. The connecting platform 61 is fixedly connected to the first moving ring platform 51 and is slidably sleeved on the rotating shaft 13. The two ends of the transmission plate 62 are respectively rotatably connected to the connecting platform 61 and the first rotating platform 32. The connecting platform 61 is provided with an outer ring platform 611, and the outer ring platform 611 is provided with an arc-shaped groove 612. The rear side of the transmission plate 62 is provided with a slider 621 that slidably cooperates with the arc-shaped groove 612. A second spring 613 is provided between the slider 621 and the arc-shaped groove 612. The front end of the transmission plate 62 is provided with a friction ring 623, and the first rotating platform 32 is provided with multiple friction plates 321 that cooperate with the friction ring 623. The front end of the transmission plate 62 is provided with multiple claw platforms 624 that are rotatably connected to the first rotating platform 32.

[0048] In order to use the rotational torque of the drying mechanism 3 as the power source to drive the second support plate 55 of the inner support mechanism 5 to automatically open, a transmission system of the transmission mechanism 6 is designed to convert the power of the rotating mechanism 1 into a linear motion of the inner support mechanism 5 to achieve automatic support for the inner wall of the pipeline. When the rotating shaft 13 drives the first rotating platform 32 to rotate, the friction plate 321 on the first rotating platform 32 contacts the friction ring 623 at the front end of the transmission plate 62 to generate frictional force. When the frictional force is greater than the pre-tightening force of the second spring 613, the slider 621 at the rear end of the transmission plate 62 slides along the arc-shaped groove 612 of the outer ring platform 611, causing the transmission plate 62 to rotate by a certain angle. Thus, the adjustment hole platform 622 drives the transmission shaft 58 to rotate by a certain angle around the axis of the transmission plate 62, causing the second support plate 55 to extend towards the inner wall of the pipeline and provide a support force.

[0049] Between the gaps of the jaw bases 624 and the friction plates 321, external air flow can pass through them and enter the inner side of the fan blade 34 through the vent holes 322 on the first turntable 32, so that the external air flow cools the friction ring 623. After the heat enters the inner side of the fan blade 34 along with the air flow, the fan blade 34 discharges it radially. On the one hand, it plays a cooling role for the friction ring 623. On the other hand, the temperature of the friction ring 623 supplements heat for the drying operation.

[0050] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A spraying device for in-situ repair of pipelines, comprising a rotating mechanism (1), a spraying mechanism (2) and an outer support mechanism (4). After the outer support mechanism (4) supports inside the pipeline, the rotating mechanism (1) drives the spraying mechanism (2) to rotate and spray the inner wall of the pipeline. It is characterized in that: It further comprises a drying mechanism (3), an inner support mechanism (5) and a transmission mechanism (6). The rotating mechanism (1) comprises a rotating shaft (13). The drying mechanism (3) comprises a rotating sleeve (31) sleeved on the rotating shaft (13). The rotating shaft (13) drives the rotating sleeve (31) to rotate. At both ends of the rotating sleeve (31), there are respectively a first turntable (32) and a second turntable (33) that rotate and slide with the rotating shaft (13). A plurality of fan blades (34) are arranged on the outer side of the rotating sleeve (31); The outer support mechanism (4) and the inner support mechanism (5) alternately support the inside of the pipeline. A driving mechanism (47) is arranged on the outer support mechanism (4). The driving mechanism (47) drives the outer support mechanism (4) and the inner support mechanism (5) to alternately move horizontally. The transmission mechanism (6) converts the torque of the drying mechanism (3) into the supporting driving force of the inner support mechanism (5).

2. The spraying device for in-situ repair of pipelines according to claim 1, characterized in that: The outer support mechanism (4) comprises two fixed ring platforms (41) rotatably connected to both ends of the rotating shaft (13). A plurality of outer support rods (42) are arranged on the outer side of the fixed ring platform (41). The end of the outer support rod (42) is provided with a telescopic supporting plate one (44). The inner support mechanism (5) comprises a first moving ring platform (51) and a second moving ring platform (52). A plurality of inner support rods (53) are arranged on the outer sides of the first moving ring platform (51) and the second moving ring platform (52). The end of the inner support rod (53) is provided with a telescopic supporting plate two (55). The supporting plate one (44) and the supporting plate two (55) are arranged in a staggered manner. The transmission mechanism (6) connects the first moving ring platform (51) and the first turntable (32). The second moving ring platform (52) is rotatably connected to the second turntable (33).

3. The spraying device for in-situ repair of pipelines according to claim 2, characterized in that: The transmission mechanism (6) comprises a connecting platform (61) and a transmission plate (62). The connecting platform (61) is fixedly connected to the first moving ring platform (51). Both ends of the transmission plate (62) are respectively rotatably connected to the connecting platform (61) and the first turntable (32). An outer ring platform (611) is arranged on the connecting platform (61). An arc-shaped groove (612) is arranged on the outer ring platform (611). A sliding block (621) that is slidably matched with the arc-shaped groove (612) is arranged on the rear side of the transmission plate (62). A second spring (613) is arranged between the sliding block (621) and the arc-shaped groove (612). A friction ring (623) is arranged at the front end of the transmission plate (62). A plurality of friction plates (321) that cooperate with the friction ring (623) are arranged on the first turntable (32).

4. The spraying device for in-situ repair of pipelines according to claim 3, characterized in that: The inner support rod (53) is provided with a chute (531). A second sliding column (54) and an adjusting block (56) are slidably arranged in the chute (531). The second sliding column (54) is connected to the second support plate (55). A first spring (561) is arranged between the adjusting block (56) and the chute (531). A transmission platform (57) is arranged outside the inner support rod (53). Two connecting rods (571) are hinged on the transmission platform (57). The two connecting rods (571) are respectively hinged to the second sliding column (54) and the adjusting block (56). A transmission shaft (58) is connected between the transmission platforms (57) corresponding to both sides of the transmission plate (62). The transmission shaft (58) passes through the adjusting hole platform (622) on the transmission plate (62).

5. The spraying device for in-situ repair of pipelines according to claim 2, wherein: The driving mechanism (47) includes a second motor (471) and a driving rod (472). The output end of the second motor (471) is connected to the driving rod (472). A first fixing frame (422) is arranged between adjacent outer support rods (42) at the top. The second motor (471) is installed on the first fixing frame (422). The driving rod (472) is rotatably arranged between the two first fixing frames (422). Two external threads (473) are arranged on the driving rod (472). A second fixing frame (59) is arranged between adjacent inner support rods (53) at the top. A threaded hole matching the external thread (473) is arranged on the second fixing frame (59). A positioning rod (591) which is slidably matched with the through hole on the first fixing frame (422) is arranged on the second fixing frame (59).

6. The spraying device for in-situ repair of pipelines according to claim 2, characterized in that: A first sliding column (43) connected to the first support plate (44) is slidably arranged on the outer support rod (42). A first air cylinder (45) is arranged on both sides of the fixed ring platform (41). The output end of the first air cylinder (45) is provided with a push plate (46). A straight notch (462) is arranged on the push plate (46). A sliding shaft (431) which is slidably matched with the straight notch (462) is arranged on the first sliding column (43).

7. A spraying device for in-situ repair of pipelines according to claim 3, characterized in that: Baffles (35) are arranged at both ends of the rotary sleeve (31). A plurality of fan blades (34) are evenly arranged between the two baffles (35). A heating strip (312) is arranged outside the rotary sleeve (31). Ventilation holes (322) communicating with the inner cavity of the fan blade (34) are arranged on the inner sides of the first turntable (32) and the second turntable (33). The gaps between a plurality of friction plates (321) on the first turntable (32) communicate with the ventilation holes (322). An air inlet hole (331) communicating with the ventilation holes (322) is arranged outside the second turntable (33).

8. A spraying device for in-situ repair of pipelines according to claim 2, characterized in that: The rotating mechanism (1) further includes a first motor (11) installed at the bottom of the outer support rod (42). The first motor (11) drives the rotating shaft (13) to rotate. A spline shaft (15) is arranged at the middle section of the rotating shaft (13). A spline groove (311) matching the spline shaft (15) is arranged inside the rotary sleeve (31).

Images