Automatic polishing device for anti-corrosion layer of oil and gas pipeline

Abstract

The utility model belongs to the technical field of oil and gas pipeline construction, and discloses an automatic polishing device for an oil and gas pipeline anti-corrosion layer. The automatic polishing device for the oil and gas pipeline anti-corrosion layer comprises an annular frame, a polishing mechanism and a walking mechanism. The outer wall of a to-be-polished pipeline is wrapped with the annular frame in the circumferential direction. The polishing mechanism comprises a driving part and a polishing flywheel, the driving part is installed on the annular frame and is in transmission connection with the polishing flywheel, and the polishing flywheel is arranged on the inner side of the annular frame and is in contact with the outer wall of the to-be-polished pipeline in an attached mode; the walking mechanism is arranged on the annular frame and slidably connected to the outer wall of the to-be-polished pipeline. And compared with a traditional manual mode, the total construction period is shortened, and the construction efficiency is greatly improved. And moreover, by using the grinding device, the physical output of manually holding the angle grinder is greatly reduced, the body health of workers is protected, the uniformity and consistency of grinding treatment are also effectively improved through mechanical operation, and the quality guarantee of subsequent procedures is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas pipeline construction, and in particular to an automatic grinding device for the anti-corrosion layer of oil and gas pipelines. Background Technology

[0002] In the field of oil and gas pipeline construction, directional drilling technology is widely used for river and mountain crossings. During the back-up operation of directional drilled pipelines, adverse geological conditions may cause scratches on the 3PE anti-corrosion layer, or even damage to the base material. To protect the 3PE anti-corrosion layer of the crossing pipeline, the current anti-corrosion structure for directional drilling sections in complex geological conditions is 3PE + fiberglass reinforced plastic (FRP) protective layer. According to the "Technical Specification for Anti-corrosion Layer of Pipelines Crossing" (SY / T 7368-2017), the 3PE anti-corrosion layer needs to be ground before the FRP protective layer is applied to ensure a firm bond.

[0003] Currently, the grinding of the 3PE anti-corrosion layer through directional drilling through pipelines is carried out on-site, mainly relying on manual hand-held angle grinders, and has not been mechanized. This manual grinding method is not only inefficient, but also requires workers to maintain a high-intensity working state for a long time, resulting in extremely high labor intensity. In addition, due to the many uncontrollable factors in manual operation, the grinding effect is often difficult to guarantee uniformity and consistency, which undoubtedly increases the quality risk for the subsequent fiberglass protective layer coating process.

[0004] Therefore, it is necessary to design an automatic grinding device for the anti-corrosion coating of oil and gas pipelines to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this invention is to provide an automatic grinding device for the anti-corrosion coating of oil and gas pipelines, which aims to alleviate the technical problems of low efficiency, poor safety and poor grinding quality of existing grinding methods for the 3PE anti-corrosion coating of oil and gas pipelines.

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

[0007] An automatic grinding device for the anti-corrosion coating of oil and gas pipelines includes:

[0008] A ring-shaped frame circumferentially covers the outer wall of the pipe to be polished.

[0009] The grinding mechanism includes a drive component and a grinding flywheel. The drive component is mounted on the annular frame and is connected to the grinding flywheel. The grinding flywheel is located on the inner side of the annular frame and is in contact with the outer wall of the pipe to be ground.

[0010] The walking mechanism is mounted on the annular frame and slidably connected to the outer wall of the pipe to be ground.

[0011] Preferably, the annular frame includes a first annular skeleton, a second annular skeleton, and a connecting rib. The first annular skeleton and the second annular skeleton are arranged side by side along the axial direction of the pipe to be ground, and the connecting rib is fixedly connected between the first annular skeleton and the second annular skeleton.

[0012] Preferably, the first annular frame includes a first arc-shaped bracket and a second arc-shaped bracket, one end of the first arc-shaped bracket is hinged to one end of the second arc-shaped bracket, and the other end of the first arc-shaped bracket is detachably fixed to the other end of the second arc-shaped bracket.

[0013] The second annular frame includes a third arc-shaped bracket and a fourth arc-shaped bracket. One end of the third arc-shaped bracket is hinged to one end of the fourth arc-shaped bracket, and the other end of the third arc-shaped bracket is detachably fixed to the other end of the fourth arc-shaped bracket.

[0014] The first arc-shaped bracket is fixedly connected to the third arc-shaped bracket via the connecting stiffener, and the second arc-shaped bracket is fixedly connected to the fourth arc-shaped bracket via the connecting stiffener.

[0015] Preferably, the ring frame further includes an isolation cover, which is disposed opposite to the grinding flywheel and covers the outside of the ring frame.

[0016] Preferably, the isolation cover includes a first cover and a second cover. There are two first covers, which are opposite each other and respectively cover the gaps of the first annular frame and the second annular frame. The second cover covers the gap between the first annular frame and the second annular frame and is hinged to the first annular frame and the second annular frame. The grinding flywheel is located inside the second cover.

[0017] Preferably, the ring frame is also provided with an angle limiting member, which is used to limit the rotation angle of the second protective cover.

[0018] Preferably, the isolation cover is provided with an observation hole.

[0019] Preferably, the ring frame has a wire hole; the grinding mechanism also includes a conductive wire harness, one end of which is connected to the drive member, and the other end is connected to the grinding flywheel through the wire hole.

[0020] Preferably, the walking mechanism includes a mounting component and a bullseye wheel, the mounting component being disposed inside the annular frame and used to mount the bullseye wheel.

[0021] Preferably, a plurality of the traveling mechanisms are evenly arranged circumferentially on the annular frame; and / or, two sets of the traveling mechanisms are arranged side by side on the annular frame along the axial direction of the pipe to be ground.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides an automatic grinding device for the anti-corrosion coating of oil and gas pipelines. In this device, a ring frame closely conforms to the outer contour of the pipeline to be ground, allowing the grinding device to be stably positioned on the pipeline. After the drive switch is activated, the grinding flywheel easily completes the grinding task of the 3PE anti-corrosion coating on the outer wall of the pipeline. After grinding, the worker pushes the ring support, and the traveling mechanism drives the ring support and the grinding mechanism mounted on the ring support to move along the circumferential and / or axial direction of the pipeline to be ground, enabling the grinding mechanism to grind different parts. Compared with traditional manual methods, the grinding device provided in this embodiment shortens the overall construction period and greatly improves construction efficiency. Moreover, using this grinding device significantly reduces the physical exertion of manually holding an angle grinder, protecting the health of workers. Mechanized operation also effectively improves the uniformity and consistency of the grinding process, which is beneficial to ensuring the quality of subsequent fiberglass protective layer coating. Attached Figure Description

[0024] Figure 1 This is an assembly diagram of the automatic oil and gas pipeline anti-corrosion coating grinding device and the pipeline to be ground provided in this embodiment of the utility model.

[0025] Figure 2 This is a bottom view of the automatic grinding device for the anti-corrosion layer of oil and gas pipelines provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 100. Pipes to be ground;

[0028] 1. Ring frame; 111. First arc-shaped support; 112. Second arc-shaped support; 121. Third arc-shaped support; 122. Fourth arc-shaped support; 13. Connecting stiffener; 14. Isolation cover; 141. First protective cover; 142. Second protective cover; 15. Angle limiting component; 16. Cable guide hole;

[0029] 21. Grinding flywheel; 22. Conductive wire harness;

[0030] 3. Walking mechanism; 31. Mounting parts; 32. Bullseye wheel. Detailed Implementation

[0031] 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 present 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, not the entire structure.

[0032] In the description of this utility model, 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 utility model based on the specific circumstances.

[0033] 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.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and "left," 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] The technical solution provided by this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] Combination Figure 1 and Figure 2As shown, this utility model provides an automatic grinding device for the anti-corrosion coating of oil and gas pipelines. The device includes a ring frame 1, a grinding mechanism, and a traveling mechanism 3. The ring frame 1 covers the outer wall of the pipeline 100 to be ground in the circumferential direction. The grinding mechanism includes a drive component and a grinding flywheel 21. The drive component is mounted on the ring frame 1 and is connected to the grinding flywheel 21. The grinding flywheel 21 is located on the inner side of the ring frame 1 and is in close contact with the outer wall of the pipeline 100 to be ground. The traveling mechanism 3 is mounted on the ring frame 1 and is slidably connected to the outer wall of the pipeline 100 to be ground.

[0037] In the above configuration, the ring frame 1 can closely fit the outer contour of the pipe 100 to be ground, allowing the grinding device to be stably positioned on the pipe 100. After the drive switch is activated, the grinding flywheel 21 can easily complete the grinding task of the 3PE anti-corrosion layer on the outer wall of the pipe 100. After grinding, the worker pushes the ring support, and the traveling mechanism 3 drives the ring support and the grinding mechanism mounted on the ring support to move along the circumferential direction and / or axial direction of the pipe 100 to be ground, allowing the grinding mechanism to grind different parts. Compared with the traditional manual method, using the grinding device provided in this embodiment, 80-100 meters of grinding work can be completed in 10 hours of work per day, shortening the total construction period and greatly improving construction efficiency. Moreover, using this grinding device greatly reduces the physical exertion of manually holding an angle grinder, protecting the health of workers. Mechanized operation also effectively improves the uniformity and consistency of the grinding process, which is beneficial to the quality assurance of the subsequent fiberglass protective layer coating.

[0038] In this embodiment, the annular frame 1 is constructed using 50mm flat iron and 20mm square steel, and includes a first annular skeleton, a second annular skeleton, and connecting stiffeners 13. The first and second annular skeletons are arranged side by side along the axial direction of the pipe 100 to be ground, and the connecting stiffeners 13 are fixedly connected between the first and second annular skeletons. This simplifies the structure of the annular frame 1, further reducing the manufacturing cost of the grinding device. Moreover, the connecting stiffeners 13 maintain the structural strength and stability of the annular frame 1, avoiding the risk of deformation during use. Optionally, multiple connecting stiffeners 13 are spaced apart between the first and second annular skeletons, which helps to further enhance the load-bearing capacity and compressive strength of the annular frame 1 while controlling costs.

[0039] In this embodiment, the first annular frame includes a first arc-shaped bracket 111 and a second arc-shaped bracket 112. One end of the first arc-shaped bracket 111 is hinged to one end of the second arc-shaped bracket 112, and the other end of the first arc-shaped bracket 111 is detachably and fixedly connected to the other end of the second arc-shaped bracket 112. The second annular frame includes a third arc-shaped bracket 121 and a fourth arc-shaped bracket 122. One end of the third arc-shaped bracket 121 is hinged to one end of the fourth arc-shaped bracket 122, and the other end of the third arc-shaped bracket 121 is detachably and fixedly connected to the other end of the fourth arc-shaped bracket 122. Furthermore, the first arc-shaped bracket 111 is fixedly connected to the third arc-shaped bracket 121 via a connecting stiffener 13, and the second arc-shaped bracket 112 is fixedly connected to the fourth arc-shaped bracket 122 via a connecting stiffener 13. This configuration facilitates the carrying and use of the annular frame 1, reduces the difficulty of assembling and disassembling the annular frame 1 and the operational pressure on workers, and helps to further improve construction efficiency.

[0040] refer to Figure 1 As shown, optionally, in this embodiment, the annular frame 1 further includes an isolation cover 14. The isolation cover 14 is disposed opposite to the grinding flywheel 21 and covers the outside of the annular frame 1. This allows the isolation cover 14 to prevent debris adhering to the pipe 100 to be ground from flying everywhere when the grinding flywheel 21 grinds the 3PE anti-corrosion layer, ensuring the safety of workers located on the side of the pipe 100 to be ground. It is understood that the number of isolation covers 14 is the same as the number of grinding mechanisms. In this embodiment, it is preferable to provide four grinding mechanisms. The four grinding mechanisms are evenly arranged on the annular frame 1 along the circumferential direction of the pipe 100 to be ground, that is, two grinding mechanisms are fixedly disposed on the first annular frame and the remaining two grinding mechanisms are fixedly disposed on the second annular frame. By increasing the number of grinding mechanisms, the grinding efficiency can be further improved and the time shortened.

[0041] Taking one of the isolation covers 14 as an example, the isolation cover 14 includes a first cover 141 and a second cover 142. There are two first covers 141, which are opposite each other and respectively cover the gaps of the first annular frame and the second annular frame. The second cover 142 covers the gap between the first annular frame and the second annular frame and is hinged to the first annular frame and the second annular frame. The grinding flywheel 21 is located inside the second cover 142. When the grinding flywheel 21 needs to be inspected, maintained or replaced, the worker can open the second cover 142 to expose the grinding flywheel 21, which makes it convenient for the worker to disassemble and assemble the grinding flywheel 21.

[0042] Optionally, the ring frame 1 provided in this embodiment is further provided with an angle limiting member 15. The angle limiting member 15 is used to limit the rotation angle of the second protective cover 142, so as to avoid unnecessary damage or safety hazards caused by the second protective cover 142 being over-opened, and to ensure that the second protective cover 142 rotates within a suitable range, thus providing better safety protection for the second protective cover 142. Optionally, the second protective cover 142 is provided with an observation hole, which allows workers to observe the grinding situation through the observation hole so as to make timely feedback actions and ensure that the grinding operation is carried out safely and orderly.

[0043] Optionally, the ring frame 1 provided in this embodiment is also provided with a wire hole 16, which is specifically provided in the first ring frame. In addition, the grinding mechanism also includes a conductive wire harness 22. One end of the conductive wire harness 22 is connected to the drive component, and the other end is connected to the grinding flywheel 21 through the wire hole 16. This not only reduces the risk of the conductive wire harness 22 being exposed and improves the stability and safety of the grinding mechanism during use, but also reduces the layout of external lines, making the overall design simpler and reducing the complex cable wiring work.

[0044] The walking mechanism 3 provided in this embodiment mainly includes a mounting component 31 and a bullseye wheel 32. The mounting component 31 is disposed on the inner side of the ring frame 1 and is used to mount the bullseye wheel 32. By the bullseye wheel 32 rolling on the pipe 100 to be ground, the ring frame 1 can move along the circumferential direction or the axial direction of the pipe 100 to be ground. In addition, the bullseye wheel 32 can provide a smooth walking trajectory and support the load of the ring frame 1, thereby ensuring the stability and reliability of the entire walking mechanism 3 during movement.

[0045] Furthermore, in this embodiment, multiple traveling mechanisms 3 are evenly arranged on the first annular frame along the circumferential direction of the pipe 100 to be ground, which can further enhance the guidance and stability of the annular frame 1 during movement and prevent the annular frame 1 from shaking. It should be noted that, since the radial dimension of the pipe 100 to be ground in this embodiment is relatively large, with a diameter of approximately 1000 mm, while the cross-sectional dimension of the grinding flywheel 21 is relatively small, in order to ensure that the pipe 100 to be ground can be effectively ground at every position in the circumferential direction, multiple traveling mechanisms 3 are arranged to further improve the grinding efficiency along the circumferential direction of the pipe 100 to be ground.

[0046] Furthermore, in this embodiment, multiple walking mechanisms 3 are provided on both the first and second annular frames along the circumferential direction of the pipe 100 to be ground, so that two sets of walking mechanisms 3 are arranged side by side on the annular frame 1 along the axial direction of the pipe 100 to be ground. This can further enhance the stability and load capacity of the walking mechanisms 3, and avoid the situation where uneven force is caused by only setting the walking mechanisms 3 on the first annular frame, resulting in the annular frame 1 shifting or being blocked.

[0047] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automatic grinding device for the anti-corrosion coating of oil and gas pipelines, characterized in that, include: A ring frame (1) is circumferentially wrapped around the outer wall of the pipe (100) to be ground; The grinding mechanism includes a drive component and a grinding flywheel (21). The drive component is mounted on the ring frame (1) and is connected to the grinding flywheel (21). The grinding flywheel (21) is located on the inner side of the ring frame (1) and is in close contact with the outer wall of the pipe (100) to be ground. The walking mechanism (3) is set on the ring frame (1) and slidably connected to the outer wall of the pipe (100) to be ground.

2. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 1, characterized in that, The ring frame (1) includes a first ring skeleton, a second ring skeleton and a connecting stiffener (13). The first ring skeleton and the second ring skeleton are arranged side by side along the axial direction of the pipe (100) to be ground, and the connecting stiffener (13) is fixedly connected between the first ring skeleton and the second ring skeleton.

3. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 2, characterized in that, The first annular frame includes a first arc-shaped bracket (111) and a second arc-shaped bracket (112). One end of the first arc-shaped bracket (111) is hinged to one end of the second arc-shaped bracket (112), and the other end of the first arc-shaped bracket (111) is detachably fixed to the other end of the second arc-shaped bracket (112). The second annular frame includes a third arc-shaped bracket (121) and a fourth arc-shaped bracket (122). One end of the third arc-shaped bracket (121) is hinged to one end of the fourth arc-shaped bracket (122), and the other end of the third arc-shaped bracket (121) is detachably fixed to the other end of the fourth arc-shaped bracket (122). The first arc-shaped bracket (111) is fixedly connected to the third arc-shaped bracket (121) through the connecting stiffener (13), and the second arc-shaped bracket (112) is fixedly connected to the fourth arc-shaped bracket (122) through the connecting stiffener (13).

4. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 2, characterized in that, The ring frame (1) also includes an isolation cover (14), which is disposed opposite to the grinding flywheel (21) and covers the outside of the ring frame (1).

5. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 4, characterized in that, The isolation cover (14) includes a first cover (141) and a second cover (142). There are two first covers (141), which are opposite to each other and respectively cover the gaps of the first annular frame and the second annular frame. The second cover (142) covers the gap between the first annular frame and the second annular frame and is hinged to the first annular frame and the second annular frame. The grinding flywheel (21) is located inside the second cover (142).

6. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 5, characterized in that, An angle limiting member (15) is also provided on the ring frame (1), which is used to limit the rotation angle of the second protective cover (142).

7. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 4, characterized in that, The isolation cover (14) is provided with an observation hole.

8. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to any one of claims 1-7, characterized in that, The ring frame (1) has a wire hole (16); the grinding mechanism also includes a conductive wire harness (22), one end of which is connected to the driving member, and the other end is connected to the grinding flywheel (21) through the wire hole (16).

9. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to any one of claims 1-7, characterized in that, The walking mechanism (3) includes a mounting component (31) and a bullseye wheel (32). The mounting component (31) is disposed inside the ring frame (1) and is used to mount the bullseye wheel (32).

10. The automatic grinding device for the anti-corrosion coating of oil and gas pipelines according to claim 9, characterized in that, The annular frame (1) is provided with a plurality of walking mechanisms (3) evenly arranged along the circumference; and / or, the annular frame (1) is provided with two sets of walking mechanisms (3) arranged side by side along the axial direction of the pipe (100) to be ground.

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