A long pipeline internal coating application device

Abstract

The application discloses a long-distance pipeline inner coating coating device. The long-distance pipeline inner coating coating device can move in the pipeline and comprises a material spraying mechanism, a coating mechanism and an adjusting support mechanism. The material spraying mechanism can spray coating materials to the inner wall surface of the pipeline. The coating roll of the coating mechanism is used for elastically pressing on the inner wall surface of the pipeline and can move along the radial direction of the pipeline in a self-adaptive mode with the change of the inner diameter of the pipeline. The first driving assembly of the coating mechanism is in transmission connection with the coating assembly and can drive the coating roll to rotate around the central axis of the pipeline. The adjusting support mechanism comprises at least two telescopic adjusting wheels. Each adjusting wheel can move towards the central axis of the pipeline or away from the central axis of the pipeline, so that the adjusting wheel can be supported on the inner wall surface of the pipeline in a rolling mode. The device can not only move in the long-distance pipeline in service and coat the coating materials, but also has good uniformity of the formed inner coating, is suitable for pipelines with different inner diameters, has high universality and wide application range.

Description

Technical Field

[0001] This invention relates to the field of pipeline corrosion protection technology, and in particular to a coating device for the inner coating of long-distance pipelines. Background Technology

[0002] With the rapid development of new energy, there is an increasing demand for converting in-service long-distance oil and gas pipelines to transport new energy media. In order to adapt to the characteristics of new energy media, it is necessary to add an inner coating to the inner wall of existing pipelines. However, the inner coating of long-distance pipelines in the current technology is generally pre-coated in the factory, which makes it difficult to apply the inner coating to in-service long-distance pipelines.

[0003] Furthermore, existing pipe internal coating equipment often suffers from uneven coating distribution on the pipe's inner wall due to precision limitations during spraying operations. Excessively thick coatings not only waste paint in some areas but may also affect the pipe's fluid transport efficiency; while insufficiently thin coatings fail to effectively prevent corrosion in other areas, shortening the pipe's service life. In addition, existing coating equipment is often designed for specific pipe diameters, failing to adapt to pipes of different diameters, lacking flexibility and versatility, which significantly limits its application range.

[0004] Therefore, how to develop a coating equipment that not only has good coating uniformity and strong versatility, but is also suitable for applying internal coatings to long-distance pipelines in service is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide an internal coating device for long-distance pipelines, which not only has good coating uniformity and strong versatility, but is also suitable for internal coating of in-service long-distance pipelines.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An internal coating application device for long-distance pipelines is movable within the pipeline to be coated. The device includes: a spraying mechanism capable of spraying coating onto the inner wall of the pipeline; a coating mechanism including a first driving component and a coating component, the coating component including a retractable coating roller for elastically pressing against the inner wall of the pipeline and adaptively moving radially along the pipeline as the inner diameter changes; the first driving component being tractively connected to the coating component and capable of driving the coating roller to rotate around the central axis of the pipeline; and an adjusting support mechanism including at least two retractable adjusting wheels, each of which can move toward or away from the central axis of the pipeline, so that the adjusting wheel can roll and support itself on the inner wall of the pipeline.

[0008] Preferably, the coating assembly further includes a support shaft, a rotating sleeve, a first adaptive telescopic member, and a connecting seat. The rotating sleeve is connected to the output end of the first drive assembly and is rotatably sleeved outside the support shaft. One end of the first adaptive telescopic member is connected to the rotating sleeve, and the other end is connected to the connecting seat. The coating roller is rotatably mounted on the connecting seat.

[0009] Preferably, the first adaptive telescopic member is provided in multiple groups, and the multiple groups of the first adaptive telescopic members are spaced apart in the circumferential direction of the rotating sleeve. Each group of the first adaptive telescopic members has a connecting seat installed on its other end, and each connecting seat is equipped with the coating roller; and / or, the first adaptive telescopic member is provided in multiples, and the multiple first adaptive telescopic members are spaced apart in the axial direction of the rotating sleeve. The multiple first adaptive telescopic members are all connected to the connecting seat; and / or, the first adaptive telescopic member is an adaptive rod, the adaptive rod includes a first rod, a second rod and an elastic member, the first rod has a rod cavity, the elastic member is placed in the rod cavity, and one end of the second rod extends into the rod cavity and is connected to the elastic member.

[0010] Preferably, the coating assembly is provided in two sets, which are located on both sides of the first driving assembly. The first driving assembly is used to simultaneously drive the coating rollers of the two sets of coating assemblies.

[0011] Preferably, the first drive assembly includes a mounting bracket and a first motor, a main bevel gear, and two driven bevel gears mounted on the mounting bracket. The motor shaft of the first motor is connected to the main bevel gear, and both driven bevel gears mesh with the main bevel gear. The two driven bevel gears are fixedly connected to the two rotating sleeves in a one-to-one correspondence.

[0012] Preferably, the adjusting support mechanism further includes a second driving component and a telescopic component. The telescopic component includes a fixed frame, an adjusting frame, and at least two sets of telescopic rods. Each set of telescopic rods includes a rotating support rod and a rotating push rod. The fixed frame and the adjusting frame are spaced apart. One end of the rotating support rod is rotatably connected to the fixed frame, and the other end is rotatably connected to the corresponding adjusting wheel. One end of the rotating push rod is rotatably connected to the adjusting frame, and the other end is rotatably connected to the middle of the rotating support rod. The output end of the second driving component is connected to the adjusting frame and is used to drive the adjusting frame to move closer to or away from the fixed frame.

[0013] Preferably, the second drive assembly includes a second motor, a lead screw, and a nut sleeve. The motor shaft of the second motor is connected to one end of the lead screw. The nut sleeve is threaded onto the lead screw and forms a lead screw and nut pair. The nut sleeve is fixed to the adjusting frame. And / or, the telescopic rod and the adjusting wheel are each provided with three, and the three adjusting wheels are arranged in an equilateral triangle.

[0014] Preferably, the spraying mechanism includes: a paint tank having a paint cavity for holding paint; a moving mechanism installed on the paint tank and used to drive the paint tank to move axially along the pipe; and a spraying mechanism installed on the paint tank, communicating with the paint cavity, and capable of spraying paint onto the inner wall of the pipe.

[0015] Preferably, the paint tank is provided with a filling port; and / or, the moving mechanism includes a main moving wheel, a secondary moving wheel, a second adaptive telescopic member, a third adaptive telescopic member, and a third motor. The main moving wheel is mounted to the paint tank via the second adaptive telescopic member, and the secondary moving wheel is mounted to the paint tank via the third adaptive telescopic member. The main moving wheel and the secondary moving wheel are located on opposite sides of the paint tank and are both capable of rolling contact with the inner wall of the pipe. The third motor is used to drive the main moving wheel to rotate; and / or, the spraying mechanism includes a spraying pump, a pipe structure, and multiple nozzles. The spraying pump is mounted to the paint tank, and the input end of the spraying pump is connected to the paint chamber. The output end of the spraying pump is connected to one end of the pipe structure, and the multiple nozzles are connected to the other end of the pipe structure. The multiple nozzles are arranged radially.

[0016] Preferably, the adjustment support mechanism is provided in two sets, and the two sets of adjustment support mechanisms are respectively provided on both sides of the coating component; and / or, the spraying mechanism and the adjustment support mechanism are connected by a universal joint, and the coating mechanism is fixedly connected to the adjustment support mechanism.

[0017] The beneficial effects of this invention are:

[0018] The long-distance pipeline internal coating device provided by this invention can move inside the pipeline. The spraying mechanism can spray coating onto the inner wall of the pipeline. The coating mechanism includes a first driving component and a coating component. The coating component includes a retractable coating roller, which elastically presses against the inner wall of the pipeline and can adaptively move radially along the pipeline according to changes in the inner diameter. The first driving component is drively connected to the coating component and can drive the coating roller to rotate around the central axis of the pipeline. An adjusting support mechanism can move with the spraying mechanism. The adjusting support mechanism includes at least two retractable adjusting wheels, each of which can move towards or away from the central axis of the pipeline, so that the adjusting wheel can roll and support itself on the inner wall of the pipeline. This long-distance pipeline internal coating device can not only move and apply coating within in-service long-distance pipelines to form an internal coating, but also provides a uniform internal coating and is suitable for adding internal coatings to pipelines with different inner diameters. It is highly versatile and has a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the coating device for the inner coating of long-distance pipelines provided by the present invention;

[0020] Figure 2 This is a front view of the long-distance pipeline internal coating application device provided by the present invention;

[0021] Figure 3 This is a schematic diagram of the spraying mechanism provided by the present invention;

[0022] Figure 4 This is a schematic diagram of the coating assembly provided by the present invention;

[0023] Figure 5 This is a front view of the coating assembly provided by the present invention;

[0024] Figure 6 This is a cross-sectional view of the coating roller and the first adaptive telescopic member provided by the present invention;

[0025] Figure 7 This is a schematic diagram of the adjustment support mechanism provided by the present invention;

[0026] Figure 8 This is a front view of the adjustment support mechanism provided by the present invention.

[0027] In the picture:

[0028] 100. Spraying mechanism;

[0029] 110. Paint box; 111. Filling port;

[0030] 120. Moving mechanism; 121. Main moving wheel; 122. Slave moving wheel; 123. Third motor; 124. Second adaptive telescopic component; 125. Third adaptive telescopic component;

[0031] 130. Spraying mechanism; 131. Spraying pump; 132. Spray nozzle; 133. Paint conduit; 134. Spray nozzle guide tube; 135. Connector; 136. Connecting pipe;

[0032] 140. Control box;

[0033] 200. Coating facility;

[0034] 210. First drive assembly; 211. Mounting bracket; 212. First motor; 213. Main bevel gear; 214. Driven bevel gear;

[0035] 220. Coating assembly; 221. Coating roller; 222. Support shaft; 223. Rotating sleeve; 224. First adaptive telescopic component; 2241. First rod; 2242. Second rod; 2243. Elastic component; 225. Connecting seat; 2251. Connecting base plate; 2252. Connecting side plate; 226. Support component; 2261. Support rod; 2262. Bearing plate;

[0036] 300. Adjustable support mechanism;

[0037] 310. Adjusting wheel;

[0038] 320. Second drive assembly; 321. Second motor; 322. Lead screw; 323. Nut sleeve; 324. Fixing sleeve;

[0039] 330. Telescopic assembly; 331. Fixing frame; 332. Adjusting frame; 333. Telescopic rod; 3331. Rotating support rod; 3332. Rotating push rod; 334. First connecting block; 335. Second connecting block;

[0040] 340. Mounting cylinder; 350. Top cover; 360. Support plate;

[0041] 400. Universal joint;

[0042] 500. Connectors. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] like Figure 1 and Figure 2 As shown, this invention discloses an internal coating application device for long-distance pipelines. This device can enter and exit the pipeline and move within it to apply a coating to the inner wall surface of the pipeline, thereby adding a new internal coating layer to improve the pipeline's performance. It should be noted that the coating can be an anti-corrosion coating, thus improving the pipeline's corrosion resistance. Besides anti-corrosion coatings, coatings with other functions can also be used to improve other aspects of the pipeline's performance. Furthermore, this internal coating application device for long-distance pipelines is suitable for both in-service and non-in-service pipelines.

[0048] Specifically, such as Figures 1 to 8As shown, the inner coating device for a long-distance pipeline includes a spraying mechanism 100, a coating mechanism 200, and an adjusting support mechanism 300. The spraying mechanism 100 is capable of spraying coating material onto the inner wall surface of the pipeline. The coating mechanism 200 includes a first drive assembly 210 and a coating assembly 220. The coating assembly 220 includes a retractable coating roller 221, which is used to elastically press against the inner wall surface of the pipeline and can adaptively move radially along the pipeline according to the change of the inner diameter of the pipeline. The first drive assembly 210 is drivenly connected to the coating assembly 220 and can drive the coating roller 221 to rotate around the central axis of the pipeline. The adjusting support mechanism 300 includes at least two retractable adjusting wheels 310, each of which can move towards or away from the central axis of the pipeline, so that the adjusting wheel 310 can roll and support itself on the inner wall surface of the pipeline.

[0049] After the coating device for the inner coating of the long-distance pipeline enters the pipeline, the adjusting support mechanism 300 is first adjusted so that the adjusting wheel 310 can move to a position that can abut against the inner wall of the pipeline, so that the adjusting wheel 310 can be stably supported on the inner wall and roll on the inner wall. Since the spraying mechanism 100 is in front and the coating mechanism 200 is behind, as the coating device for the inner coating of the long-distance pipeline moves in the pipeline, the spraying mechanism 100 first sprays the coating onto the inner wall of the pipeline, and then the coating roller 221, which rotates around the central axis of the pipeline, pushes the coating already sprayed on the inner wall of the pipeline, so that the coating can be evenly applied to the inner wall of the pipeline along the circumference of the pipeline to form a thin and uniform inner coating.

[0050] In the long-distance pipeline inner coating device disclosed in this invention, since the adjusting wheel 310 is extensible, the adjusting support mechanism 300 can adapt to pipelines with different inner diameters. Once the adjusting wheel 310 is tightly attached to the inner wall of the pipeline, the entire adjusting support mechanism 300 forms a stable support structure, thereby enabling rapid adaptation and stable support for pipelines with different inner diameters. Furthermore, since the coating roller 221 is extensible, the coating mechanism 200 can adaptively adjust to pipelines with different inner diameters. The coating roller 221 in the coating assembly 220 is driven to rotate by the first driving assembly 210, and the coating material is sprayed in front by the spraying mechanism 100. The rotating coating roller 221 can coat the already sprayed inner wall of the pipeline, thereby achieving uniform distribution of coating material on the inner wall of the pipeline and avoiding uneven coating thickness or excessively thin coating in some areas of the inner wall of the pipeline, effectively ensuring the uniformity of the coating material on the inner wall of the pipeline. In summary, this long-distance pipeline internal coating application device can not only move and apply coatings within in-service long-distance pipelines, thereby forming an internal coating inside the pipeline, but also has good uniformity and is suitable for adding internal coatings to pipelines with different inner diameters. It is highly versatile and has a wide range of applications.

[0051] Continue to refer to Figure 3As shown, the spraying mechanism 100 includes a paint tank 110, which has a paint cavity for holding paint. Optionally, the paint tank 110 is provided with a filling port 111, through which paint can be added to the paint cavity of the paint tank 110. Optionally, the paint tank 110 is cubic in shape. (Continuing to refer to...) Figure 3 As shown, the long-distance pipeline internal coating application device also includes a control box 140. Optionally, the control box 140 is mounted on the paint tank 110. The control box 140 includes a control mechanism and a battery. The control mechanism has a control system. In this embodiment, the control mechanism can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control each electrical component in the device to perform its function. It should be noted that, with the paint tank 110, the long-distance pipeline internal coating application device disclosed in this invention can coat the inner wall of a pipeline of at least 2 kilometers in one operation. Therefore, the size of the battery in the control box 140 and the volume of the paint chamber in the paint tank 110 need to be adapted accordingly.

[0052] In some embodiments, the spraying mechanism 100 provides power for the movement of the coating application device throughout the long-distance pipeline within the pipeline. (Continue referring to...) Figure 3 As shown, the long-distance pipeline internal coating application device also includes a moving mechanism 120, which is installed in the paint tank 110 and used to drive the paint tank 110 to move axially along the pipeline. It should be noted that the moving mechanism 120 can also be provided in the coating mechanism 200 and the adjusting support mechanism 300, so that the coating mechanism 200 and the adjusting support mechanism 300 can also provide power for the movement of the entire long-distance pipeline internal coating application device within the pipeline.

[0053] Optionally, the moving mechanism 120 includes a main moving wheel 121, a driven moving wheel 122, a second adaptive telescopic member 124, a third adaptive telescopic member 125, and a third motor 123. The main moving wheel 121 is mounted on the paint tank 110 via the second adaptive telescopic member 124, and the driven moving wheel 122 is mounted on the paint tank 110 via the third adaptive telescopic member 125. The main moving wheel 121 and the driven moving wheel 122 are located on opposite sides of the paint tank 110 and can both roll against the inner wall of the pipeline. The third motor 123 drives the main moving wheel 121 to rotate. The control system controls the third motor 123 to start working, which drives the main moving wheel 121 to rotate. With the rotation of the main moving wheel 121, and with the assistance and balance of the driven moving wheel 122, the entire device can move stably and flexibly within the pipeline. That is, by using the main moving wheel 121 and the driven moving wheel 122 to support the inner wall of the pipeline respectively, it is beneficial to improve the movement stability of the entire coating application device in the long-distance pipeline. If the inner diameter of the pipe changes, since both the second adaptive expansion member 124 and the third adaptive expansion member 125 have autonomous expandability, the main moving wheel 121 always rolls against the inner wall of the pipe under the action of the second adaptive expansion member 124, and the secondary moving wheel 122 always rolls against the inner wall of the pipe under the action of the third adaptive expansion member 125, so that the moving mechanism 120 can be adapted to pipes with different inner diameters.

[0054] Optionally, the second adaptive telescopic member 124 and the third adaptive telescopic member 125 have the same structure, both being adaptive rods. Each adaptive rod includes a first rod, a second rod, and an elastic body. The first rod has a rod cavity, and the elastic body is placed inside the rod cavity. One end of the second rod extends into the rod cavity and connects to the elastic body. The elastic body can be a helical spring or a folded spring sheet. Of course, the second adaptive telescopic member 124 and the third adaptive telescopic member 125 can also be other structures capable of deformation, such as spring blocks, shape memory alloy parts, etc.

[0055] In some embodiments, the main moving wheel 121 is located at the bottom of the paint tank 110, and the secondary moving wheel 122 is located at the top of the paint tank 110. Of course, in other embodiments, the main moving wheel 121 may be located at the top of the paint tank 110, and the secondary moving wheel 122 at the bottom; or, one of the main moving wheel 121 and the secondary moving wheel 122 may be located on the left side of the paint tank 110, and the other on the right side. In one specific embodiment, there are two main moving wheels 121 and two secondary moving wheels 122, with the two main moving wheels 121 spaced apart in the front-back direction of the paint tank 110, and the two secondary moving wheels 122 also spaced apart in the front-back direction of the paint tank 110. Of course, in other embodiments, the number of main moving wheels 121 and secondary moving wheels 122 may be set according to requirements.

[0056] Continue to refer to Figure 3 As shown, the spraying mechanism 100 also includes a spraying mechanism 130, which is installed in the paint tank 110. The spraying mechanism 130 is connected to the paint chamber and can spray paint onto the inner wall of the pipe.

[0057] Optionally, the spraying mechanism 130 includes a spray pump 131, a pipe structure, and multiple nozzles 132. The spray pump 131 is installed in the paint tank 110, and its input end is connected to the paint chamber. The output end of the spray pump 131 is connected to one end of the pipe structure, and the multiple nozzles 132 are connected to the other end of the pipe structure, arranged radially. By setting multiple nozzles 132, the radially arranged nozzles 132 can simultaneously spray paint onto different positions on the inner wall of the pipe. Compared with single-point spraying, multi-point spraying can reduce the difficulty of the coating roller 221 spreading the paint later, and also help improve the uniformity of the inner coating. Furthermore, the spray pump 131 is electrically connected to the battery inside the control box 140.

[0058] In some embodiments, the pipe structure includes a paint conduit 133, a nozzle guide pipe 134, a connector 135, and a connecting pipe 136 connected in sequence. One end of the paint conduit 133 is connected to the output end of the spray pump 131, and the other end of the paint conduit 133 is fixedly connected to the nozzle guide pipe 134. The end of the nozzle guide pipe 134 is provided with a connector 135, and the outer wall of the connector 135 is provided with multiple connecting pipes 136. Each connecting pipe 136 is provided with a nozzle 132 at its end. Of course, in other embodiments, the pipe structure can also be configured as a combination of multiple pipe joints and multiple branch pipes as needed. The pipe joint has one input end and multiple output ends. The input end is directly connected to the output port of the spray pump 131, and the multiple output ends are respectively connected to multiple nozzles 132 one by one through multiple branch pipes. In a specific embodiment, there are four nozzles 132 and four connecting pipes 136.

[0059] When spraying is required, the control system inside the control box 140 starts the spray pump 131. The spray pump 131 is electrically connected to the battery inside the control box 140 to ensure sufficient power supply. After the spray pump 131 starts working, its side input end draws paint from the inner cavity of the paint tank 110. After being pressurized by the spray pump 131, the paint is transported through the paint conduit 133 connected to the output end of the spray pump 131. The paint conduit 133 transports the paint to the nozzle guide pipe 134, which guides and distributes the paint. At the end of the nozzle guide pipe 134, the connector 135 distributes the paint into multiple connecting pipes 136. Each connecting pipe 136 is equipped with a nozzle 132 at its end. The nozzle 132 sprays the paint in a mist or line to spray the inner wall of the pipe. When the spraying is completed, the control system shuts off the spray pump 131, thus ending the spraying process.

[0060] Coating assembly 220 is the main structure for spreading and evenly applying the coating. (Continue referring to...) Figure 4 As shown, in some embodiments, the coating assembly 220 further includes a supporting shaft 222, a rotating sleeve 223, a first adaptive telescopic member 224, and a connecting seat 225. The supporting shaft 222 provides support for the rotating sleeve 223. The rotating sleeve 223 is connected to the output end of the first drive assembly 210 and is rotatably sleeved outside the supporting shaft 222. One end of the first adaptive telescopic member 224 is connected to the rotating sleeve 223, and the other end is connected to the connecting seat 225. The coating roller 221 is rotatably mounted on the connecting seat 225. Under the drive of the first drive assembly 210, the rotating sleeve 223 can rotate around the supporting shaft 222, and the first adaptive telescopic member 224 can rotate synchronously with the rotating sleeve 223, so that the connecting seat 225 and the coating roller 221 can rotate synchronously. The coating roller 221 rolls circumferentially on the inner wall of the pipe, which can push and evenly coat the paint sprayed on the inner wall of the pipe.

[0061] Optionally, the first adaptive telescopic member 224 is an adaptive rod, and so on. Figure 6 As shown, the adaptive rod includes a first rod 2241, a second rod 2242, and an elastic element 2243. The first rod 2241 has a rod cavity, and the elastic element 2243 is placed inside the rod cavity. One end of the second rod 2242 extends into the rod cavity and is connected to the elastic element 2243. The elastic element 2243 can be a helical spring or a folded spring sheet. Of course, the first adaptive telescopic element 224 can also be other structures capable of deformation, such as a spring block, a shape memory alloy component, etc.

[0062] Optionally, the connecting seat 225 includes a connecting base plate 2251 and two connecting side plates 2252. The two connecting side plates 2252 are connected to both ends of the connecting base plate 2251. The coating roller 221 is placed between the two connecting base plates 2251, and both ends of the coating roller 221 are rotatably connected to the two connecting base plates 2251 respectively. The top end of the first adaptive telescopic member 224 is connected to the connecting base plate 2251.

[0063] Continue to refer to Figure 4 As shown, in some embodiments, the coating assembly 220 further includes a support member 226 connected between the rotating sleeve 223 and the first adaptive telescopic member 224. Optionally, the support member 226 includes a support rod 2261 and a support plate 2262, one end of the support rod 2261 being connected to the rotating sleeve 223, the other end of the support rod 2261 being connected to the support plate 2262, and the bottom end of the first adaptive telescopic member 224 being connected to the support plate 2262.

[0064] To improve the support stability of the coating roller 221, in some embodiments, multiple first adaptive telescopic members 224 are provided. These multiple first adaptive telescopic members 224 are spaced apart axially on the rotating sleeve 223, and each of them is connected to the connecting seat 225. Optionally, the multiple first adaptive telescopic members 224 are spaced apart between the support plate 2262 and the connecting base plate 2251. In one specific embodiment, three first adaptive telescopic members 224 are provided, and these three members simultaneously support one coating roller 221. Of course, in other embodiments, the number of first adaptive telescopic members 224 can be increased as needed, for example, by providing two, four, or other numbers.

[0065] To improve coating efficiency and effectiveness, continue to refer to... Figure 4 As shown, multiple sets of first adaptive telescopic members 224 are provided, and these sets are spaced apart circumferentially on the rotating sleeve 223. Each set of first adaptive telescopic members 224 has a connecting seat 225 mounted on its other end, and each connecting seat 225 has a coating roller 221 mounted on it. It should be noted that a set of first adaptive telescopic members 224 may include one first adaptive telescopic member 224, or it may include multiple first adaptive telescopic members 224 spaced apart axially on the rotating sleeve 223. In one specific embodiment, two sets of first adaptive telescopic members 224 are provided, and the two sets are symmetrically arranged on the rotating sleeve 223. Of course, in other embodiments, three, four, or more sets of first adaptive telescopic members 224 may be provided as needed.

[0066] Furthermore, the coating assembly 220 is provided in two sets, with the two sets of coating assemblies 220 located on both sides of the first drive assembly 210. The first drive assembly 210 is used to simultaneously drive the coating rollers 221 of the two sets of coating assemblies 220.

[0067] To achieve simultaneous driving of the two coating components 220, continue referring to... Figure 5As shown, the first drive assembly 210 includes a mounting frame 211 and a first motor 212, a main bevel gear 213, and two driven bevel gears 214 mounted on the mounting frame 211. The motor shaft of the first motor 212 is connected to the main bevel gear 213, and both driven bevel gears 214 mesh with the main bevel gear 213. The two driven bevel gears 214 are fixedly connected to two rotating sleeves 223 in a one-to-one correspondence. Optionally, the mounting frame 211 has a U-shaped structure. The first motor 212 is mounted in the U-shaped groove of the mounting frame 211, the main bevel gear 213 is mounted on the lower surface of the base plate of the mounting frame 211, and the two driven bevel gears 214 are mounted on the outer side of the side plate of the mounting frame 211. When the first motor 212 operates, the main bevel gear 213 rotates, driving the two driven bevel gears 214 to rotate, and the two driven bevel gears 214 respectively drive their corresponding rotating sleeves 223 to rotate. Of course, in other embodiments, two motors can also be used directly to drive the two rotating sleeves 223.

[0068] When coating is required, the control system starts the first motor 212, which can be powered by a battery. The first motor 212 is mounted on the mounting bracket 211. The first motor 212 drives the main bevel gear 213 to rotate. The main bevel gear 213 meshes with two driven bevel gears 214, so the driven bevel gears 214 also rotate synchronously. The driven bevel gears 214 are fixedly sleeved on the rotating sleeve 223, so the rotating sleeve 223 also rotates around the support shaft 222. The rotating sleeve 223 is connected to the bearing plate 2262 through the support rod 2261. Several adaptive rods are distributed on the bearing plate 2262. The other end of the adaptive rod is connected to the connecting side plate 2252 through the connecting base plate 2251. The coating roller 221 is rotatably installed between the two connecting side plates 2252. When the rotating sleeve 223 rotates, the coating roller 221 also rotates accordingly. During the coating process, the adaptive rod can adjust itself according to the shape of the pipe's inner wall, which may be uneven or bent. When the coating roller 221 encounters a protrusion or depression, the elastic element 2243 acts as a buffer, allowing the coating roller 221 to adhere tightly to the inner wall of the pipe for coating. When working with pipes of different inner diameters, the second rod 2242 contracts within its cavity, pressing against the elastic element 2243. This allows the adaptive rod to adjust itself to pipes of different inner diameters. The first drive assembly 210 drives the coating roller 221 to rotate, thus coating the already sprayed inner wall of the pipe. This ensures uniform coating distribution on the inner wall of the pipe, preventing uneven coating thickness or excessively thin coating in some areas, effectively guaranteeing the uniformity of the coating.

[0069] The adjusting support mechanism 300 is mainly used to stably support the entire device inside the pipeline. (Continue referring to...) Figure 7 and Figure 8As shown, the adjustment support mechanism 300 also includes a second drive assembly 320 and a telescopic assembly 330. The telescopic assembly 330 includes a fixed frame 331, an adjustment frame 332, and at least two sets of telescopic rods 333. Each set of telescopic rods 333 includes a rotating support rod 3331 and a rotating push rod 3332. The fixed frame 331 and the adjustment frame 332 are spaced apart. One end of the rotating support rod 3331 is rotatably connected to the fixed frame 331, and the other end is rotatably connected to the corresponding adjustment wheel 310. One end of the rotating push rod 3332 is rotatably connected to the adjustment frame 332, and the other end is rotatably connected to the middle of the rotating support rod 3331. The output end of the second drive assembly 320 is connected to the adjustment frame 332 and is used to drive the adjustment frame 332 to move closer to or away from the fixed frame 331. Driven by the second drive assembly 320, the adjusting frame 332 can move closer to the fixed frame 331, thereby reducing the angle between the rotating support rod 3331 and the rotating push rod 3332, and the adjusting wheel 310 moves away from the central axis of the pipe; and driven by the second drive assembly 320, the adjusting frame 332 can move away from the fixed frame 331, thereby increasing the angle between the rotating support rod 3331 and the rotating push rod 3332, and the adjusting wheel 310 moves closer to the central axis of the pipe.

[0070] In some embodiments, the adjusting support mechanism 300 further includes a cylindrical mounting cylinder 340, a plate-shaped top cover 350, and a support plate 360. A plurality of clearance through holes are provided around the mounting cylinder 340. The fixing frame 331 and the adjusting frame 332 are both located inside the mounting cylinder 340. The telescopic rod 333 and the adjusting wheel 310 can extend to the outside of the mounting cylinder 340 through the clearance through holes. The top cover 350 and the support plate 360 ​​are respectively provided at both ends of the mounting cylinder 340.

[0071] In some embodiments, the second drive assembly 320 includes a second motor 321, a lead screw 322, and a nut sleeve 323. The motor shaft of the second motor 321 is connected to one end of the lead screw 322. The nut sleeve 323 is threaded onto the lead screw 322, forming a lead screw and nut pair. The nut sleeve 323 is fixed to the adjusting bracket 332. Optionally, the second motor 321 is mounted on the outside of the top cover 350. A fixing bracket 331 is mounted on the outside of the output end of the second motor 321 through a fixing sleeve 324. The other end of the lead screw 322 is rotatably connected to the support plate 360, and the support shaft 222 is also fixed to the support plate 360. Of course, in other embodiments, the second drive assembly 320 may be combined with other mechanisms capable of outputting linear motion, such as a combination of a motor and a gear rack.

[0072] In some embodiments, three telescopic rods 333 and three adjusting wheels 310 are provided, and the three adjusting wheels 310 are arranged in an equilateral triangle. Optionally, both the fixing frame 331 and the adjusting frame 332 are triangular plate structures with three mounting parts. The mounting part of the fixing frame 331 is rotatably connected to the rotating support rod 3331 through the first connecting block 334, and the mounting part of the adjusting frame 332 is rotatably connected to the rotating push rod 3332 through the second connecting block 335.

[0073] When the control system starts the second motor 321, the battery supplies power to the second motor 321. The output of the second motor 321 drives the lead screw 322 to rotate synchronously. The lead screw 322 drives the adjusting frame 332 to move. Since the adjusting frame 332 is threadedly connected to the lead screw 322, the rotation of the lead screw 322 is converted into the axial movement of the adjusting frame 332. As the adjusting frame 332 moves, the angle of the rotating support rod 3331 begins to change through the movable connection between the rotating support rod 3331 and the rotating push rod 3332. This change allows the adjusting wheel 310 to gradually approach... Or it can be moved away from the central axis of the pipe to adapt to pipes with different inner diameters. Once the adjusting wheel 310 is tightly attached to the inner wall of the pipe, the entire adjusting support mechanism 300 forms a stable support structure. At this time, both the fixed frame 331 and the adjusting frame 332 maintain this stable state through the coordinated action of rotating support rod 3331 and rotating push rod 3332. By controlling the rotation direction and speed of the second motor 321, the position and angle of the adjusting wheel 310 can be precisely adjusted, thereby achieving rapid adaptation and stable support for pipes with different diameters.

[0074] Continue to refer to Figure 1 and Figure 2 As shown, in some embodiments, the adjusting support mechanism 300 is provided in two sets, with the two sets of adjusting support mechanisms 300 respectively located on both sides of the coating assembly 220. This arrangement helps to improve movement stability, thereby improving the uniformity of the coating.

[0075] Continue to refer to Figure 1 and Figure 2 As shown, the spraying mechanism 100 is connected to the adjacent adjusting support mechanism 300 via a universal joint 400. The use of the universal joint 400 allows the entire device to steer within a certain range. Through its internal universal joint structure, the universal joint 400 can transmit torque and rotation in different directions, thereby enabling the device to steer and allowing it to pass through 90-degree bends.

[0076] Furthermore, continue to refer to Figure 1 and Figure 2As shown, the long-distance pipeline inner coating application device also includes a connector 500. The connector 500 is located on the adjustment support mechanism 300 near the spraying mechanism 100. One end of the connector 500 is fixed on the circumferential surface of the mounting cylinder 340, and the other end is connected to the universal drive 400.

[0077] The usage process of the long-distance pipeline internal coating application device disclosed in this invention is as follows:

[0078] First, based on the inner diameter of the pipe, the second motor 321 is started, which drives the lead screw 322 to rotate. The rotation of the lead screw 322 is converted into the axial movement of the adjusting frame 332. Through the movable connection between the rotating push rod 3332 and the rotating support rod 3331, the angle of the rotating support rod 3331 begins to change, causing the adjusting wheel 310 to gradually move away from the center line of the inner wall of the pipe, thereby adapting to the inner diameter of the pipe. Finally, the adjusting wheel 310 fits against the inner wall of the pipe, achieving rapid adaptation and stable support for pipes of different diameters.

[0079] Then, an appropriate amount of paint is added to the paint tank 110 through the filling port 111 on the top of the paint tank 110 to ensure that there is enough paint for subsequent spraying and coating. Then, the entire device is placed in the pipeline. When spraying is required, the control system in the control box 140 starts the spraying pump 131. After the spraying pump 131 starts working, its side input end draws paint from the inner cavity of the paint tank 110. After the paint is pressurized by the spraying pump 131, it is transported through the paint conduit 133 connected to the output end. The paint conduit 133 transports the paint to the nozzle guide pipe 134. The nozzle guide pipe 134 plays the role of guiding and distributing the paint. At the end of the nozzle guide pipe 134, the connector 135 distributes the paint into four connecting pipes 136. Each connecting pipe 136 is equipped with a nozzle 132 at its end. The nozzle 132 sprays the paint out in a mist or line to achieve spraying of the inner wall of the pipeline.

[0080] Simultaneously, the coating mechanism on the rear side drives the main bevel gear 213 to rotate via the first motor 212. The main bevel gear 213 meshes with two driven bevel gears 214, so the driven bevel gears 214 also rotate synchronously. The driven bevel gears 214 are fixedly sleeved on the rotating sleeve 223, so the rotating sleeve 223 also rotates accordingly. When the rotating sleeve 223 rotates, the coating roller 221 also rotates accordingly. During the coating process, since the inner wall of the pipe may be uneven or bent, the adaptive rod can adaptively adjust according to the shape of the inner wall of the pipe. When the coating roller 221 encounters a protrusion or depression, the elastic element 22... 43 acts as a buffer, allowing the coating roller 221 to adhere tightly to the inner wall of the pipe for coating. When working on pipes with different inner diameters, the contraction of the second rod 2242 within the rod cavity presses against the elastic element 2243, thereby enabling the adaptive rod to adaptively adjust to pipes with different inner diameters. The first drive assembly 210 drives the coating roller 221 to rotate, thus enabling the coating roller 221 to coat the already sprayed inner wall of the pipe, achieving uniform coating distribution on the inner wall of the pipe and avoiding uneven coating thickness or excessively thin coating in some areas, effectively ensuring the uniformity of the coating.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A coating device for the inner coating of a long-distance pipeline, characterized in that, The long-distance pipeline internal coating application device, capable of moving within the pipeline to be coated, includes: A spraying mechanism (100) is capable of spraying paint onto the inner wall surface of the pipe; The coating mechanism (200) includes a first drive assembly (210) and a coating assembly (220). The coating assembly (220) includes a retractable coating roller (221) which is used to elastically press against the inner wall surface of the pipe and can adaptively move along the radial direction of the pipe as the inner diameter of the pipe changes. The first drive assembly (210) is connected to the coating assembly (220) and can drive the coating roller (221) to rotate around the central axis of the pipe. An adjusting support mechanism (300) includes at least two retractable adjusting wheels (310), each of which is movable toward or away from the central axis of the pipe, so that the adjusting wheel (310) can be rolled and supported on the inner wall of the pipe.

2. The long-distance pipeline internal coating application device according to claim 1, characterized in that, The coating assembly (220) further includes a support shaft (222), a rotating sleeve (223), a first adaptive telescopic member (224), and a connecting seat (225). The rotating sleeve (223) is connected to the output end of the first drive assembly (210). The rotating sleeve (223) is rotatably sleeved outside the support shaft (222). One end of the first adaptive telescopic member (224) is connected to the rotating sleeve (223), and the other end is connected to the connecting seat (225). The coating roller (221) is rotatably mounted on the connecting seat (225).

3. The long-distance pipeline internal coating application device according to claim 2, characterized in that, The first adaptive telescopic component (224) is provided in multiple sets, and the multiple sets of the first adaptive telescopic component (224) are spaced apart in the circumferential direction of the rotating sleeve (223). Each set of the first adaptive telescopic component (224) has a connecting seat (225) installed on the other end, and each connecting seat (225) has a coating roller (221) installed on it. And / or, multiple first adaptive telescopic members (224) are provided, and multiple first adaptive telescopic members (224) are spaced apart in the axial direction of the rotating sleeve (223), and multiple first adaptive telescopic members (224) are all connected to the connecting seat (225); And / or, the first adaptive telescopic member (224) is an adaptive rod, the adaptive rod including a first rod (2241), a second rod (2242) and an elastic member (2243), the first rod (2241) having a rod cavity, the elastic member (2243) being placed in the rod cavity, and one end of the second rod (2242) extending into the rod cavity and connected to the elastic member (2243).

4. The long-distance pipeline internal coating application device according to claim 2, characterized in that, The coating assembly (220) is provided in two sets, and the two sets of coating assemblies (220) are located on both sides of the first drive assembly (210). The first drive assembly (210) is used to drive the coating rollers (221) of the two sets of coating assemblies (220) simultaneously.

5. The long-distance pipeline internal coating application device according to claim 4, characterized in that, The first drive assembly (210) includes a mounting bracket (211) and a first motor (212), a main bevel gear (213) and two driven bevel gears (214) mounted on the mounting bracket (211). The motor shaft of the first motor (212) is connected to the main bevel gear (213). Both driven bevel gears (214) mesh with the main bevel gear (213). The two driven bevel gears (214) are fixedly connected to the two rotating sleeves (223) one by one.

6. The long-distance pipeline internal coating application device according to claim 1, characterized in that, The adjustment support mechanism (300) further includes a second drive assembly (320) and a telescopic assembly (330). The telescopic assembly (330) includes a fixed frame (331), an adjustment frame (332), and at least two sets of telescopic rods (333). Each set of telescopic rods (333) includes a rotating support rod (3331) and a rotating push rod (3332). The fixed frame (331) and the adjustment frame (332) are spaced apart. One end of the rotating support rod (3331) is rotatably connected to the fixed frame (331), and the other end is rotatably connected to the corresponding adjustment wheel (310). One end of the rotating push rod (3332) is rotatably connected to the adjustment frame (332), and the other end is rotatably connected to the middle part of the rotating support rod (3331). The output end of the second drive assembly (320) is connected to the adjustment frame (332) and is used to drive the adjustment frame (332) to move closer to or away from the fixed frame (331).

7. The long-distance pipeline internal coating application device according to claim 6, characterized in that, The second drive assembly (320) includes a second motor (321), a lead screw (322), and a nut sleeve (323). The motor shaft of the second motor (321) is connected to one end of the lead screw (322). The nut sleeve (323) is threaded onto the lead screw (322) and forms a lead screw and nut pair. The nut sleeve (323) is fixed on the adjusting frame (332). And / or, each of the telescopic rod (333) and the adjusting wheel (310) is provided with three, and the three adjusting wheels (310) are arranged in an equilateral triangle.

8. The long-distance pipeline internal coating application device according to claim 1, characterized in that, The spraying mechanism (100) includes: Paint tank (110), the paint tank (110) having a paint cavity for holding paint; A moving mechanism (120) is mounted on the paint tank (110) and is used to drive the paint tank (110) to move axially along the pipeline; A spraying mechanism (130) is installed in the paint tank (110), the spraying mechanism (130) is connected to the paint cavity, and can spray paint onto the inner wall of the pipe.

9. The long-distance pipeline internal coating application device according to claim 8, characterized in that, The paint tank (110) is provided with a filling port (111); And / or, the moving mechanism (120) includes a main moving wheel (121), a secondary moving wheel (122), a second adaptive telescopic member (124), a third adaptive telescopic member (125), and a third motor (123). The main moving wheel (121) is mounted on the paint tank (110) via the second adaptive telescopic member (124), and the secondary moving wheel (122) is mounted on the paint tank (110) via the third adaptive telescopic member (125). The main moving wheel (121) and the secondary moving wheel (122) are located on opposite sides of the paint tank (110) and are both capable of rolling contact with the inner wall of the pipe. The third motor (123) is used to drive the main moving wheel (121) to rotate. And / or, the spraying mechanism (130) includes a spraying pump (131), a pipe structure and a plurality of nozzles (132), the spraying pump (131) is installed in the paint tank (110) and the input end of the spraying pump (131) is connected to the paint chamber, the output end of the spraying pump (131) is connected to one end of the pipe structure, and the plurality of nozzles (132) are connected to the other end of the pipe structure, and the plurality of nozzles (132) are arranged radially.

10. The long-distance pipeline internal coating application device according to claim 1, characterized in that, The adjustment support mechanism (300) is provided in two sets, and the two sets of adjustment support mechanisms (300) are respectively provided on both sides of the coating component (220); And / or, the spraying mechanism (100) is connected to the adjusting support mechanism (300) via a universal joint (400), and the coating mechanism (200) is fixedly connected to the adjusting support mechanism (300).

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