Pipeline spraying device and pipeline repairing method

Abstract

The invention relates to a pipeline spraying device and a pipeline repairing method. The pipeline spraying device comprises a mounting bracket, a moving mechanism and a spraying mechanism, the mounting bracket is provided with a first bracket and a second bracket which are oppositely arranged; the mounting bracket is connected with an external traction mechanism on one side of the first bracket; the moving mechanism comprises a first connecting rod with one end hinged to the first support, a first roller arranged on the first connecting frame and abutting against the inner wall of the pipeline, a second connecting rod with one end hinged to the second support, and a second roller arranged on the second connecting frame and abutting against the inner wall of the pipeline. The first support is provided with a first adjusting assembly used for adjusting the supporting angle of the first connecting rod. The second support is provided with a second adjusting assembly used for adjusting the supporting angle of the first connecting rod. The installation support is provided with a telescopic structure used for adjusting the distance between the first support and the second support. The pipeline spraying device has the effect that the problem that the spraying thickness is not uniform due to the fact that the pipeline spraying device and the drainage pipeline are difficult to center is solved.

Description

Technical Field

[0001] This application relates to the field of pipeline repair technology, and in particular to a pipeline spraying device and pipeline repair method. Background Technology

[0002] Spray coating repair is an important trenchless pipeline repair technology, especially suitable for the internal wall repair of large-diameter drainage pipes. Its core principle is to use mechanical means to evenly spray repair coating onto the inner wall of the pipe, forming a continuous and dense protective or structural layer.

[0003] In related technologies, pipe spraying devices typically include a moving mechanism connected to an external traction device and a rotary spraying mechanism located at the rear end of the moving mechanism. The moving mechanism has multiple spaced-apart moving rods supported on the inner wall of the pipe, with rollers at the ends of the rods. The operator pulls the moving mechanism at one end, causing the pipe spraying device to move along the length of the pipe. Simultaneously, the rotary spraying mechanism at the rear end of the moving mechanism rotates at high speed along the axis of the pipe spraying device, spraying the inner wall of the pipe to form a uniform protective coating. To improve the adaptability of the pipe spraying device to pipes of different diameters, the moving rods are equipped with telescopic structures, allowing for independent adjustment of the length of each individual moving rod.

[0004] Regarding the aforementioned technologies, the inventors believe that the adjustment method of the aforementioned moving rod makes it difficult to align the pipe spraying device with the drainage pipe, resulting in uneven spraying thickness when the rotating spraying mechanism repairs and sprays the drainage pipe. Summary of the Invention

[0005] To address the problem of uneven coating thickness caused by difficulty in aligning the pipe spraying device with the drainage pipe, this application provides a pipe spraying device and a pipe repair method.

[0006] In a first aspect, this application provides a pipeline spraying device, which adopts the following technical solution: A pipe spraying device includes a mounting bracket, a moving mechanism arranged on the mounting bracket for moving the mounting bracket, and a spraying mechanism arranged on the mounting bracket for spraying repair coating onto the inner wall of the pipe. The mounting bracket has a first bracket and a second bracket arranged opposite to each other, and the mounting bracket is connected to an external traction mechanism on one side of the first bracket. The moving mechanism includes a first connecting rod with one end hinged to the first bracket, a first roller arranged on the movable end of the first connecting rod and abutting against the inner wall of the pipe, a second connecting rod with one end hinged to the second bracket, and a second roller arranged on the movable end of the second connecting rod and abutting against the inner wall of the pipe. The first bracket has a first adjusting component for adjusting the support angle of the first connecting rod; the second bracket has a second adjusting component for adjusting the support angle of the first connecting rod; and the mounting bracket has a telescopic structure for adjusting the distance between the first bracket and the second bracket.

[0007] By adopting the above technical solution, when spraying and repairing pipes of any diameter, the operator places the pipe spraying device inside the pipe, uses the first adjusting component to adjust the support angle of the first connecting rod to ensure that the first roller abuts against the inner wall of the pipe, and uses the second adjusting component to adjust the support angle of the second connecting rod to ensure that the second roller abuts against the inner wall of the pipe. Then, the distance between the first and second supports is adjusted by the telescopic structure to make the distance between the first and second rollers reasonable, further improving the stability of the mounting bracket. The external traction mechanism connected to one end of the mounting bracket can realize the movement of the pipe spraying device inside the pipe, and cooperates with the spraying mechanism installed at the other end of the mounting bracket to spray repair coating onto the inner wall of the pipe, improving the problem of uneven spraying thickness caused by the difficulty in aligning the pipe spraying device with the drainage pipe.

[0008] Optionally, the number of the first connecting rods is three and they are arranged circumferentially at intervals along the axis of the mounting bracket, and the ends of the three first connecting rods are each provided with a first roller that is rolled on the inner wall of the pipe; the number of the second connecting rods is three and they are arranged circumferentially at intervals along the axis of the mounting bracket, and the ends of the three second connecting rods are each provided with a second roller that is rolled on the inner wall of the pipe.

[0009] By adopting the above technical solution, three evenly spaced first connecting rods with first rollers at their ends and three evenly spaced second connecting rods with second rollers at their ends are set up, so that the pipeline spraying device can more stably abut against the inner wall of the pipeline, which helps to improve the stability of the pipeline spraying device when it moves inside the pipeline, thereby facilitating subsequent spraying and repair operations on the inner wall of the pipeline.

[0010] Optionally, the first connecting rod and the second connecting rod are arranged in a staggered manner.

[0011] By adopting the above technical solution, the first connecting rod and the second connecting rod are arranged in a staggered manner, which reduces the risk of mutual interference when the first roller and the second roller move, and enables the pipeline spraying device to move more smoothly in the pipeline.

[0012] Optionally, the first adjustment assembly includes a first connecting ring slidably arranged on the first bracket, a first linear module for driving the first connecting ring to slide, and a first support rod hinged between the first connecting ring and the first connecting rod; the first bracket has a first annular groove for allowing the first connecting ring to slide; the first linear module includes a first lead screw fixed to the first bracket, a first sliding block arranged on the first connecting ring and sliding in cooperation with the first lead screw, and a first motor for driving the first lead screw.

[0013] By adopting the above technical solution, the specific structure of the first adjustment component is disclosed. The first motor drives the first lead screw, which causes the first sliding block to slide the first connecting ring in the first annular groove, thereby causing one end of the first support rod to move. This realizes the adjustment of the support angle of the first connecting rod, so that the first roller can stably abut against the inner wall of the pipe, which helps to ensure the centering stability of the pipe spraying device in the pipe and its adaptability to different pipe diameters.

[0014] Optionally, the second adjustment assembly includes a second connecting ring slidably arranged on the second bracket, a second linear module for driving the second connecting ring to slide, and a second support rod hinged between the second connecting ring and the second connecting rod; the second bracket has a second annular groove for allowing the second connecting ring to slide; the second linear module includes a second lead screw fixed to the second bracket, a second sliding block arranged on the second connecting ring and sliding in cooperation with the second lead screw, and a second motor for driving the second lead screw.

[0015] By adopting the above technical solution, the specific structure of the second adjustment component is disclosed. The second motor drives the second lead screw, which causes the second sliding block to slide the second connecting ring in the second annular groove, thereby causing one end of the second support rod to move. This realizes the adjustment of the support angle of the second connecting rod, so that the second roller can stably abut against the inner wall of the pipe. This helps to further ensure the centering stability of the pipe spraying device in the pipe and its adaptability to different pipe diameters.

[0016] Optionally, the telescopic structure includes a connecting block disposed on the second bracket and cooperating with the first lead screw, the connecting block having a nut for threaded engagement with the first lead screw; the pitch of the helix of the first lead screw is greater on the side closer to the connecting block than on the side farther from the connecting block.

[0017] By adopting the above technical solution, the distance between the first support and the second support is adjusted by using the nut on the connecting block to cooperate with the first lead screw. At the same time, the pitch of the first lead screw on the side closer to the connecting block is greater than the pitch on the side farther from the connecting block, so that the adjustment of the distance between the first support and the second support can be adapted to the horizontal displacement of the first connecting rod. This ensures that the distance between the first roller and the second roller remains consistent when adapting to pipes of different diameters, which helps to improve the movement stability of the pipe spraying device.

[0018] Optionally, it also includes an intermediate support fixed to the middle section of the mounting bracket, the intermediate support having a support arm that cooperates with the first adjustment component and the second adjustment component and is used to support the mounting bracket in the middle of the pipe; the number of the support arms is three and they are arranged circumferentially at intervals along the outer edge of the intermediate support.

[0019] By adopting the above technical solution, the three circumferentially spaced support arms of the intermediate bracket, in conjunction with the first adjustment component and the second adjustment component, help the pipe spraying device to more stably support the mounting bracket in the middle of the pipe during its forward movement. This ensures that the axis of the pipe spraying device can always be aligned with the axis of the pipe, thereby reducing the impact of the pipe spraying device's shaking on the spraying effect during its forward movement and improving the problem of uneven spraying thickness on the inner wall of the pipe.

[0020] Optionally, the spraying mechanism includes a rotary mounting base rotatably mounted on the side of the second bracket away from the first bracket, a plurality of atomizing nozzles arranged on the rotary mounting base, a feed pipe for outputting repair paint to the atomizing nozzles, and a third motor for driving the rotary mounting base to rotate along the axis of the mounting bracket.

[0021] By adopting the above technical solution, the specific structure of the spraying mechanism is disclosed. The third motor drives the rotating mounting base to rotate along the axis of the mounting bracket, and drives the atomizing nozzle to rotate around the axis of the mounting bracket. The centrifugal force and power generated by the rotation enable the repair coating to be sprayed more evenly onto the inner wall of the pipe, which helps to improve the repair efficiency and repair quality of the inner wall of the pipe.

[0022] Optionally, the number of atomizing nozzles is not less than three and they are evenly spaced on the side of the rotary mounting base.

[0023] By adopting the above technical solution and using no fewer than three atomizing nozzles evenly spaced on the side of the rotating mounting base, the repair coating can be sprayed more evenly onto the inner wall of the pipe when the rotating mounting base rotates, which helps to further improve the quality and effect of the pipe inner wall spraying repair.

[0024] Secondly, this application provides a pipeline repair method, which adopts the following technical solution: A pipeline repair method, employing the pipeline spraying device described above, includes the following steps: S1. Installation and alignment: Place the mounting bracket inside the pipe, adjust the first adjustment component so that all three first rollers abut against the inner wall of the pipe, and then adjust the second adjustment component so that all three second rollers abut against the inner wall of the pipe.

[0025] S2. Spraying Repair: Start the third motor to drive the rotating mounting base to rotate along the axis of the mounting bracket, start the traction mechanism to move the mounting bracket inside the pipe, and multiple high-speed rotating atomizing nozzles to evenly spray repair coating onto the inner wall of the pipe.

[0026] By adopting the above technical solution, the mounting bracket can be accurately placed in a suitable position inside the pipe, so that the three first rollers and three second rollers abut against the inner wall of the pipe. This ensures that the pipe spraying device is stably supported and accurately positioned inside the pipe, facilitating the subsequent spraying of the pipe inner wall repair coating by the subsequent spraying mechanism. The third motor drives the rotating mounting base to rotate, and in conjunction with the traction mechanism, it moves the mounting bracket inside the pipe, allowing multiple high-speed rotating atomizing nozzles to spray the repair coating onto the inner wall of the pipe, thus achieving effective repair of the inner wall of the pipe.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. A pipe spraying device, comprising a mounting bracket, a moving mechanism, and a spraying mechanism; when spraying and repairing pipes of any diameter, the operator places the pipe spraying device inside the pipe, and uses a first adjusting component and a second adjusting component to adjust the support angles of the first connecting rod and the second connecting rod respectively, ensuring that the first roller and the second roller both abut against the inner wall of the pipe, so that the axis of the pipe spraying device coincides with the axis of the pipe; the pipe spraying device is pulled to move at a uniform speed inside the pipe by an external traction mechanism connected to one end of the mounting bracket, and the axis of the pipe spraying device and the axis of the pipe always remain coincident during the movement, and the spraying mechanism installed at the other end of the mounting bracket sprays repair coating onto the inner wall of the pipe, which helps to improve the problem of uneven spraying thickness caused by the difficulty in aligning the pipe spraying device with the drainage pipe; 2. A pipe repair method that accurately positions the mounting bracket inside the pipe, ensuring that the three first rollers and three second rollers abut against the inner wall of the pipe. This guarantees stable support and accurate positioning of the pipe spraying device within the pipe, facilitating subsequent spraying of the pipe inner wall repair coating by the subsequent spraying mechanism. A third motor drives the rotating mounting base to rotate, which, in conjunction with a traction mechanism, moves the mounting bracket within the pipe, allowing multiple high-speed rotating atomizing nozzles to spray the repair coating onto the inner wall of the pipe, thus achieving effective repair of the pipe inner wall. 3. The distance between the first and second supports is adjusted by the nut on the connecting block engaging with the first lead screw. At the same time, the pitch of the first lead screw on the side closer to the connecting block is greater than the pitch on the side farther from the connecting block, so that the adjustment of the distance between the first and second supports can be matched with the horizontal displacement of the first connecting rod. This ensures that the distance between the first and second rollers remains consistent when adapting to pipes of different diameters, which helps to improve the movement stability of the pipe spraying device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pipe spraying device in Embodiment 1 of this application.

[0029] Figure 2 This is a side view of the pipeline spraying device along the axial direction in Embodiment 1 of this application.

[0030] Figure 3 This is a cross-sectional view of the pipeline spraying device in Embodiment 1 of this application along the axial direction.

[0031] Figure 4 yes Figure 3 A schematic diagram of the connection between the connecting block at point A and the first lead screw.

[0032] Figure 5 This is a schematic diagram of the support arm in Embodiment 1 of this application.

[0033] Figure 6 This is a cross-sectional view of the spraying mechanism in Embodiment 1 of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Mounting bracket; 11. First bracket; 111. First annular groove; 12. Second bracket; 121. Second annular groove; 122. Connecting block; 1221. Nut; 13. Intermediate bracket; 14. Connecting part; 2. Moving mechanism; 21. First connecting rod; 22. First roller; 23. Second connecting rod; 24. Second roller; 3. Spraying mechanism; 31. Rotary mounting base; 32. Atomizing nozzle; 33. Material conveying pipe ; 4. First adjusting component; 41. First connecting ring; 42. First linear module; 421. First lead screw; 422. First sliding block; 423. First motor; 43. First support rod; 5. Second adjusting component; 51. Second connecting ring; 52. Second linear module; 521. Second lead screw; 522. Second sliding block; 523. Second motor; 53. Second support rod; 6. Support arm; 61. Electric push rod; 62. Third roller. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] Example 1 This application discloses a pipeline spraying device. (Refer to...) Figure 1 The pipeline spraying device includes a mounting bracket 1, a moving mechanism 2 arranged on the mounting bracket 1 for moving the mounting bracket 1, and a spraying mechanism 3 arranged on the mounting bracket 1 for spraying repair coating onto the inner wall of the pipeline. The mounting bracket 1 has a first bracket 11 and a second bracket 12 arranged opposite to each other. An intermediate bracket 13, fixedly connected to the mounting bracket 1, is also provided between the first bracket 11 and the second bracket 12. The mounting bracket 1 has a connecting portion 14 on one side of the first bracket 11 for connecting to an external traction mechanism. In this embodiment, the traction mechanism is a winch. A CCTV trolley transports the traction end of the winch's traction rope from the outlet end to the inlet end of the pipeline, and the tightening end of the traction rope is fixed to the winch's winding drum.

[0037] Reference Figure 1 and Figure 2 The moving mechanism 2 includes a first connecting rod 21 hinged at one end to a first bracket 11, a first roller 22 arranged at the movable end of the first connecting bracket and abutting against the inner wall of the pipe, a second connecting rod 23 hinged at one end to a second bracket 12, and a second roller 24 arranged at the movable end of the second connecting bracket and abutting against the inner wall of the pipe. There are three first connecting rods 21 arranged circumferentially at intervals along the axis of the mounting bracket 1, and each of the three first connecting rods 21 has a first roller 22 at its movable end. There are also three second connecting rods 23 arranged circumferentially at intervals along the axis of the mounting bracket 1, and each of the three second connecting rods 23 has a second roller 24 at its movable end. The movable ends of the first connecting rods 21 extend towards one side of the second bracket 12, and the movable ends of the second connecting rods 23 extend towards one side of the first bracket 11. The first connecting rods 21 and 23 are staggered in a direction perpendicular to the axis of the mounting bracket 1. The first bracket 11 has a first adjusting assembly 4 for adjusting the support angle of the first connecting rods 21. The second bracket 12 has a second adjustment component 5 for adjusting the support angle of the second connecting rod 23. The first connecting rod 21 and the first adjustment component 4, and the second connecting rod 23 and the second adjustment component 5, respectively form movable support structures, allowing the pipe spraying device to move smoothly within the pipe.

[0038] Reference Figure 2 and Figure 3The first adjustment assembly 4 includes a first connecting ring 41 slidably arranged on the first bracket 11, a first linear module 42 for driving the first connecting ring 41 to slide, and a first support rod 43 hinged between the first connecting ring 41 and the first connecting rod 21. The first bracket 11 has a first annular groove 111 on its side wall near the second bracket 12 for the first connecting ring 41 to slide. The first linear module 42 includes a first lead screw 421 fixed to the first bracket 11, a first sliding block 422 arranged on the first connecting ring 41 and sliding in cooperation with the first lead screw 421, and a first motor 423 for driving the first lead screw 421.

[0039] Reference Figure 2 and Figure 3 The second adjustment assembly 5 includes a second connecting ring 51 slidably arranged on the second bracket 12, a second linear module 52 for driving the second connecting ring 51 to slide, and a second support rod 53 hinged between the second connecting ring 51 and the second connecting rod 23. The second bracket 12 has a second annular groove 121 on its side wall near one end of the first bracket 11 for the second connecting ring 51 to slide. The second linear module 52 includes a second lead screw 521 fixed to the second bracket 12, a second sliding block 522 arranged on the second connecting ring 51 and sliding in cooperation with the second lead screw 521, and a second motor 523 for driving the second lead screw 521.

[0040] Reference Figure 3 and Figure 4 The mounting bracket 1 has a telescopic structure for adjusting the distance between the first bracket 11 and the second bracket 12. The telescopic structure includes a connecting block 122 disposed on the second bracket 12 and engaging with the first lead screw 421. The connecting block 122 has a nut 1221 for threaded engagement with the first lead screw 421. The pitch of the helix of the first lead screw 421 is greater on the side closer to the connecting block 122 than on the side farther from the connecting block 122, thereby adjusting the distance between the first bracket 11 and the second bracket 12, ensuring that the distance between the first roller 22 and the second roller 24 remains constant.

[0041] Reference Figure 5 The intermediate support 13 has a support arm 6 that cooperates with the first adjustment assembly 4 and the second adjustment assembly 5 to support the mounting bracket 1 in the middle of the pipe. The support arm 6 includes an electric push rod 61 mounted on the intermediate support 13 and a third roller 62 mounted on the end of the electric push rod 61. There are three support arms 6 arranged circumferentially at intervals along the outer edge of the intermediate support 13, and the three support arms 6 are staggered with the first connecting rod 21 and the second connecting rod 23.

[0042] Reference Figure 1 and Figure 6The spraying mechanism 3 includes a rotary mounting base 31 rotatably mounted on the side of the second bracket 12 away from the first bracket 11, a plurality of atomizing nozzles 32 arranged on the rotary mounting base 31, a storage tank mounted on the mounting bracket 1 for storing repair paint, a delivery pipe 33 for outputting the repair paint in the storage tank to the atomizing nozzles 32, and a third motor for driving the rotary mounting base 31 to rotate along the axis of the mounting bracket 1. The storage tank has a booster pump for outputting the repair paint to the atomizing nozzles 32 along the delivery pipe 33. In this embodiment, the number of atomizing nozzles 32 is three and they are evenly spaced on the side of the rotary mounting base 31.

[0043] The implementation principle of the pipe spraying device in this application embodiment is as follows: When spraying and repairing pipes of any diameter, the operator places the pipe spraying device inside the pipe, uses the first adjusting component 4 to adjust the support angle of the first connecting rod 21 to ensure that the first roller 22 abuts against the inner wall of the pipe, and uses the second adjusting component 5 to adjust the support angle of the second connecting rod 23 to ensure that the second roller 24 abuts against the inner wall of the pipe, so that the axis of the pipe spraying device coincides with the axis of the pipe; the distance between the first bracket 11 and the second bracket 12 is adjusted by the telescopic structure so that the distance between the first roller 22 and the second roller 24 is always consistent, further improving the stability of the mounting bracket 1; the pipe spraying device is pulled to move at a uniform speed inside the pipe by an external traction mechanism connected to one end of the mounting bracket 1. During the movement, the axis of the pipe spraying device and the axis of the pipe always remain coincident. In conjunction with the spraying mechanism 3 installed at the other end of the mounting bracket 1, the repair coating is sprayed onto the inner wall of the pipe, which helps to improve the problem of uneven spraying thickness caused by the difficulty in aligning the pipe spraying device with the drainage pipe.

[0044] Example 2 This application discloses a pipeline repair method. The pipeline repair method uses the pipeline spraying device of Embodiment 1 and includes the following steps: S1. A winch for pulling the pipe spraying device is installed on the outside of the pipe outlet. The traction end of the traction rope is connected to the pipe cleaning equipment, and the pipe cleaning equipment is placed at the pipe outlet. The pipe cleaning equipment is started, and the cleaning nozzles on the equipment spray cleaning fluid onto the inner wall of the pipe. The high-speed spray of cleaning fluid drives the pipe cleaning equipment to move rapidly from the pipe outlet to the inlet, simultaneously flushing away debris adhering to the inner wall of the pipe to the outside of the outlet. After the pipe is cleaned, the traction end of the traction rope is disconnected from the pipe cleaning equipment, and the pipe cleaning equipment is removed.

[0045] S2. The mounting bracket 1 is positioned at the inlet end of the pipe, with one end of the first bracket 11 positioned in front and one end of the second bracket 12 positioned behind. The traction end of the traction rope is fixed to the connecting part 14 of the mounting bracket 1. The three support arms 6 located in the middle bracket 13 can provide certain support. The first adjusting component 4 is adjusted by driving the first lead screw 421 through the first motor 423, so that the first rollers 22 at the end of the first connecting rod 21 all abut against the inner wall of the pipe. The second adjusting component 5 is adjusted by driving the second lead screw 521 through the second motor 523, so that the second rollers 24 at the end of the second connecting rod 23 all abut against the inner wall of the pipe.

[0046] S3. Start the third motor 35 to drive the rotating mounting base 31 to rotate along the axis of the mounting bracket 1, and the storage tank outputs repair coating to the atomizing nozzle 32. Start the traction mechanism to drive the mounting bracket 1 to move at a constant speed from the inlet end to the outlet end in the pipeline, and control the moving speed between 10m / min and 20m / min. During the movement, the first roller 22 and the second roller 24 always abut against the inner wall of the pipeline, so that the axis of the mounting bracket 1 always coincides with the axis of the pipeline, and the multiple atomizing nozzles 32 rotating at high speed spray the repair coating evenly onto the inner wall of the pipeline.

[0047] Example 3 This application discloses a pipeline repair method. The pipeline repair method uses the pipeline spraying device of Embodiment 1 and includes the following steps: S1. A winch for pulling the pipe spraying device is installed outside the outlet end of the pipe. The traction end of the traction rope is connected to the pipe cleaning equipment, and the pipe cleaning equipment is placed at the outlet end of the pipe. The pipe cleaning equipment is started, and the cleaning nozzles arranged on the pipe cleaning equipment spray cleaning fluid onto the inner wall of the pipe. The high-speed spray of cleaning fluid drives the pipe cleaning equipment to move quickly from the outlet end of the pipe along the pipe towards the inlet end, while simultaneously flushing the debris adhering to the inner wall of the pipe to the outside of the outlet end. After the pipe is cleaned, the traction end of the traction rope is separated from the pipe cleaning equipment, and the pipe cleaning equipment is removed. In this embodiment, the inlet end of the pipe is the end with a smaller diameter, and the outlet end of the pipe is the end with a larger diameter.

[0048] S2. The mounting bracket 1 is positioned at the inlet end of the pipe, with one end of the first bracket 11 positioned in front and one end of the second bracket 12 positioned behind. The traction end of the traction rope is fixed to the connecting part 14 of the mounting bracket 1. The three support arms 6 located in the middle bracket 13 can provide certain support. The first adjusting component 4 is adjusted by driving the first lead screw 421 through the first motor 423, so that the first rollers 22 at the end of the first connecting rod 21 all abut against the inner wall of the pipe. The second adjusting component 5 is adjusted by driving the second lead screw 521 through the second motor 523, so that the second rollers 24 at the end of the second connecting rod 23 all abut against the inner wall of the pipe.

[0049] S3. Start the third motor 35 to drive the rotating mounting base 31 to rotate along the axis of the mounting bracket 1, and the storage tank outputs repair coating to the atomizing nozzle 32. Start the traction mechanism to drive the mounting bracket 1 to move at a constant speed in the pipeline, and control the moving speed between 10m / min and 20m / min. The support arm 6 located in the middle bracket 13 and the second connecting rod 23 support each other so that the axis of the mounting bracket 1 always coincides with the axis of the pipeline. Driven by the first motor 423, the first bracket 11 moves forward, and at the same time, the first connecting ring 41 slides forward along the first annular groove 111, which increases the support angle of the first support rod 43, and the first roller 22 abuts against the inner wall of the pipeline. The support arm 6 and the first connecting rod 21 maintain the support state, the second bracket 12 moves forward, and driven by the second motor 523, the second connecting ring 51 slides backward along the second annular groove 121, which increases the support angle of the second support rod 53, and the second roller 24 abuts against the inner wall of the pipeline. As the pipeline repair device moves from the inlet to the outlet, multiple high-speed rotating atomizing nozzles 32 uniformly spray repair coating onto the inner wall of the pipeline.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe spraying device, characterized in that, The device includes a mounting bracket (1), a moving mechanism (2) arranged on the mounting bracket (1) for moving the mounting bracket (1), and a spraying mechanism (3) arranged on the mounting bracket (1) for spraying repair coating onto the inner wall of the pipe; the mounting bracket (1) has a first bracket (11) and a second bracket (12) arranged opposite to each other, and the mounting bracket (1) is connected to an external traction mechanism on one side of the first bracket (11); the moving mechanism (2) includes a first connecting rod (21) with one end hinged to the first bracket (11), and a movable end arranged on the first connecting rod and abutting against it. The first support (1) has a first roller (22) on the inner wall of the pipe, a second connecting rod (23) with one end hinged to the second support (12), and a second roller (24) arranged on the movable end of the second connecting frame and abutting against the inner wall of the pipe; the first support (11) has a first adjusting component (4) for adjusting the support angle of the first connecting rod (21); the second support (12) has a second adjusting component (5) for adjusting the support angle of the first connecting rod (21); the mounting bracket (1) has a telescopic structure for adjusting the distance between the first support (11) and the second support (12).

2. The pipe spraying device according to claim 1, characterized in that, The number of the first connecting rods (21) is three and they are arranged circumferentially along the axis of the mounting bracket (1), and the ends of the three first connecting rods (21) are each equipped with a first roller (22) that is rolled on the inner wall of the pipe; the number of the second connecting rods (23) is three and they are arranged circumferentially along the axis of the mounting bracket (1), and the ends of the three second connecting rods (23) are each equipped with a second roller (24) that is rolled on the inner wall of the pipe.

3. A pipe spraying device according to claim 2, characterized in that, The first connecting rod (21) and the second connecting rod (23) are arranged in a staggered manner.

4. A pipe spraying device according to claim 1, characterized in that, The first adjustment assembly (4) includes a first connecting ring (41) slidably arranged on the first bracket (11), a first linear module (42) for driving the first connecting ring (41) to slide, and a first support rod (43) hinged between the first connecting ring (41) and the first connecting rod (21); the first bracket (11) has a first annular groove (111) for the first connecting ring (41) to slide; the first linear module (42) includes a first lead screw (421) fixed to the first bracket (11), a first sliding block (422) arranged on the first connecting ring (41) and sliding in cooperation with the first lead screw (421), and a first motor (423) for driving the first lead screw (421).

5. A pipe spraying device according to claim 1, characterized in that, The second adjustment assembly (5) includes a second connecting ring (51) slidably arranged on the second bracket (12), a second linear module (52) for driving the second connecting ring (51) to slide, and a second support rod (53) hinged between the second connecting ring (51) and the second connecting rod (23); the second bracket (12) has a second annular groove (121) for the second connecting ring (51) to slide; the second linear module (52) includes a second lead screw (521) fixed to the second bracket (12), a second sliding block (522) arranged on the second connecting ring (51) and sliding in cooperation with the second lead screw (521), and a second motor (523) for driving the second lead screw (521).

6. A pipe spraying device according to claim 4, characterized in that, The telescopic structure includes a connecting block (122) arranged on the second bracket (12) and cooperating with the first lead screw (421), the connecting block (122) having a nut (1221) for thread engagement with the first lead screw (421); the pitch of the helix of the first lead screw (421) is greater on the side closer to the connecting block (122) than on the side farther away from the connecting block (122).

7. A pipe spraying device according to claim 1, characterized in that, It also includes an intermediate support (13) fixed to the middle section of the mounting bracket (1), the intermediate support (13) having a support arm (6) that cooperates with the first adjustment component (4) and the second adjustment component (5) and is used to support the mounting bracket (1) in the middle of the pipe; the number of the support arms (6) is three and they are arranged circumferentially at intervals along the outer edge of the intermediate support (13).

8. A pipe spraying device according to claim 1, characterized in that, The spraying mechanism (3) includes a rotating mounting base (31) rotatably mounted on the side of the second bracket (12) away from the first bracket (11), a plurality of atomizing nozzles (32) arranged on the rotating mounting base (31), a feed pipe (33) for outputting repair paint to the atomizing nozzles (32), and a third motor for driving the rotating mounting base (31) to rotate along the axis of the mounting bracket (1).

9. A pipe spraying device according to claim 8, characterized in that, The number of atomizing nozzles (32) is not less than three and they are evenly spaced on the side of the rotating mounting base (31).

10. A pipeline repair method, characterized in that, The pipeline spraying apparatus according to any one of claims 1-9 comprises the following steps: S1. Installation and alignment: Place the mounting bracket (1) inside the pipe, adjust the first adjustment component (4) so ​​that all three first rollers (22) abut against the inner wall of the pipe, and then adjust the second adjustment component (5) so that all three second rollers (24) abut against the inner wall of the pipe. S2, Spraying Repair: Start the third motor (35) to drive the rotating mounting base (31) to rotate along the axis of the mounting bracket (1), start the traction mechanism to drive the mounting bracket (1) to move inside the pipe, and the high-speed rotating multiple atomizing nozzles (32) spray the repair coating evenly onto the inner wall of the pipe.

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