A pig for oil and gas pipelines

Abstract

The utility model relates to a self-rotating pig for oil and natural gas pipeline, belong to pipeline cleaning technical field, the pig includes box, support walking mechanism and install the leather bowl of box outer wall, the box is hollow body, is equipped with the battery in the box and is installed with the drive motor for providing power through the support frame, the output shaft of drive motor and the central axis of box coincide, the first output shaft of drive motor can detachable connection support walking mechanism, support walking mechanism includes with the first output shaft connection first pivot and installs the spiral plate on the first pivot, and the spiral plate outer edge evenly is equipped with the gyro wheel that agrees with the pipeline inner wall. The utility model adopts one motor to match the spiral plate with gyro wheel to can complete the self-rotation advance of pig, greatly alleviates the counterweight, simple structure, convenient to use.

Description

Technical Field

[0001] This utility model relates to a self-rotating pipeline cleaning tool for oil and gas pipelines, belonging to the field of pipeline cleaning technology. Background Technology

[0002] Oil and gas pipelines are pipelines that transport oil and gas (including associated gas from oil fields) from extraction sites or processing plants to urban gas distribution centers or industrial enterprises. After long-term operation, the inner walls of oil and gas pipelines may accumulate solid contaminants such as paraffin wax and rust, as well as some liquid and semi-solid oil stains. This reduces the pipeline's flow area, affecting its transport capacity. Moreover, these solid contaminants, when adhering to the inner walls of the pipeline for a long time, will accelerate pipeline corrosion through complex chemical reactions, affecting the safety performance of oil and gas transportation pipelines. Therefore, it is necessary to clean the inner walls of the pipelines regularly.

[0003] Existing pipeline cleaning pigs for oil and gas pipelines typically consist of a housing that moves within the pipeline wall, a cleaning cup mounted on the outer wall of the housing, and a support mechanism. During operation, the housing moves the cleaning cup, which is attached to the inner wall of the oil and gas pipeline, scraping away oil and deposits. Currently, commonly used cleaning pigs are propelled by the oil, gas, liquid, or pipeline transport medium. However, when these pigs rely on the medium for propulsion, their rotation is unstable, and due to their significant weight, they are prone to misalignment during rotation. This results in uneven wear of the cleaning cup, incomplete cleaning, and a significant waste of energy.

[0004] Chinese invention patent application CN114798622A, published on July 29, 2022, discloses a self-rotating pipe cleaner. This self-rotating pipe cleaner includes a column and two sets of cleaning devices. The column is disposed inside the column along the length of the pipe. The two sets of cleaning devices are respectively disposed on both ends of the column. Each set of cleaning devices includes multiple first motors, which are evenly distributed around the axis of the column on the end face of the column. The output shaft of each first motor is evenly fixedly connected to fan blades. The edges of the fan blades can abut against the inner wall of the pipe, and all fan blades have the same tilt angle. Each first motor is electrically connected to a controller. Regardless of whether the cleaner is working inside the pipe, the fan blades on both sides of the column abutting against the inner wall of the pipe can effectively support the column. However, the cleaner uses multiple motors to drive rotation and forward movement, resulting in a large counterweight and complex structure. Moreover, the blades on the cleaner, while rotating and moving forward, both support the cleaner and scrape away deposits in the pipes. Due to the radial reaction force and the frictional force in the forward direction, the cleaner has difficulty moving forward and the blades wear out severely. Utility Model Content

[0005] The purpose of this invention is to provide a self-rotating pipeline cleaning tool for oil and gas pipelines, in order to solve the problem that the existing technology uses multiple motors to drive the cleaning tool to rotate and move forward, resulting in a large counterweight and complex structure.

[0006] To achieve the above objectives, the technical solution of this utility model for a self-rotating pipeline pig for oil and gas pipelines is as follows:

[0007] A self-rotating pipeline cleaning device for oil and gas pipelines includes a housing, a support and travel mechanism, and a cup-shaped device mounted on the outer wall of the housing. The housing is hollow and contains a battery. A drive motor for providing power is mounted on the housing via a support frame. The output shaft of the drive motor coincides with the central axis of the housing. The first output shaft of the drive motor is detachably connected to the support and travel mechanism. The support and travel mechanism includes a first rotating shaft connected to the first output shaft and a spiral plate mounted on the first rotating shaft. Rollers that fit against the inner wall of the pipeline are evenly distributed on the outer edge of the spiral plate.

[0008] The beneficial effects of the above solution are as follows: This utility model's self-rotating pipeline cleaning tool for oil and gas pipelines is an improved invention. This utility model provides a self-rotating pipeline cleaning tool for oil and gas pipelines, in which a first rotating shaft is connected to the first output shaft of a motor. The motor's output shaft drives the first rotating shaft to rotate, which in turn drives a spiral plate on the first rotating shaft to rotate. Rollers on the spiral plate rotate in contact with the inner wall of the pipeline, causing the spiral plate to push the housing forward. The housing then drives the cleaning cup forward, scraping away oil or deposits in the oil and gas pipeline. Simultaneously, the cleaning cup creates friction with the inner wall of the pipeline, preventing the housing from rotating with the spiral plate. The pipeline cleaning tool provided by this utility model uses only one motor and a spiral plate with rollers to complete the self-rotating forward movement of the cleaning tool, and the spiral plate with rollers on its edge supports the cleaning action. Compared with existing self-rotating pipeline cleaners driven by motors, this tool only requires one motor, greatly reducing the counterweight, simplifying the structure, making it easy to use, and ensuring smooth movement during forward movement.

[0009] As a further improvement, the drive motor is a dual-head motor, which includes a second output shaft in the opposite direction to the first output shaft. The second output shaft is detachably connected to a second rotating shaft extending out of the housing. Multiple support rods are vertically fixed or detachably and evenly connected to the second rotating shaft outside the housing. The ends of the support rods near the inner wall of the pipe are equipped with cleaning brushes and / or scrapers for scraping the inner wall of the pipe.

[0010] The beneficial effects of the above solution are as follows: using a dual-head motor with two output shafts, and the second output shaft, which is opposite in direction to the first output shaft, is connected to a second rotating shaft. A support rod for scraping the inner wall of the pipe is connected to the second rotating shaft. During the forward movement, the support rod rotates under the drive of the second rotating shaft. The cleaning brush and / or scraper set at the top of the support rod can first clean the inner wall of the pipe during the forward movement, and then the rubber cup scrapes and collects the residue. This can clean the pipe more thoroughly, effectively reduce the number of cleanings during routine maintenance, and ensure the normal transport capacity of the pipe.

[0011] As a further improvement, the first rotating shaft and the first output shaft are detachably connected by a coupling, and the spiral plate is fixedly connected to the first rotating shaft.

[0012] As a further improvement, the first rotating shaft and the first output shaft are detachably connected by a coupling, the spiral plate is fixedly connected to the mounting tube, and the mounting tube is fitted onto the first rotating shaft by a keyway structure and fixed by a pressure cap.

[0013] The beneficial effects of the above solution are as follows: the first rotating shaft of the cleaner of this utility model is detachably connected to the spiral plate by a key connection. In actual work, the spiral plate that matches the inner wall of the pipe can be selectively installed according to the size of the pipe diameter to be cleaned, so that the cleaner can be used for cleaning pipes of various specifications, increasing its practicality.

[0014] As a further improvement, the outer edge of the spiral plate is provided with a mounting groove, and the roller is mounted on the mounting groove by a pin.

[0015] As a further improvement, the roller is a cylindrical roller, and the outer rim of the roller is provided with anti-slip texture.

[0016] As a further improvement, the support rod includes an outer tube that is fixedly or detachably connected to the second rotating shaft. A movable rod and a spring are sequentially installed in the outer tube cavity via a pressure cap. A cleaning brush and / or scraper for scraping the inner wall of the pipe are installed at the end of the movable rod that extends out of the outer tube and is close to the inner wall of the pipe.

[0017] The beneficial effects of the above solution are as follows: the cleaner of this utility model has a support rod designed to be telescopic, which can adaptively adjust according to the deposition of oil or sediment in the pipe during the forward movement, which is conducive to completing the cleaning while maintaining the smooth forward movement of the cleaner.

[0018] As a further improvement, the movable rod is provided with a mounting block at its top end near the inner wall of the pipe, and the mounting block is connected to the cleaning brush and / or scraper in a socket structure.

[0019] The beneficial effects of the above solution are as follows: the cleaning support rod of this utility model is configured as a telescopic structure including a movable rod, and the top of the movable rod is provided with an installation block. The installation block is connected to the cleaning brush and / or scraper by a socket structure (such as a T-slot or a dovetail groove), which allows for more flexible selection of the installation of the cleaning brush and / or scraper according to the thickness of the oil and gas pipeline.

[0020] As a further improvement, the housing is provided with multiple mounting plates, and the cup bolts are connected to the mounting plates.

[0021] The beneficial effects of the above solution are as follows: The cleaning device of this utility model is equipped with an installation plate on the box, and the leather cup is threadedly connected to the installation plate. In actual work, the cleaning leather cup that matches the inner wall of the pipe diameter can be selectively installed according to the size of the pipe being cleaned, so that the pipe cleaner can adapt to the cleaning of pipes of various diameters and is more practical. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main sectional view of the self-rotating pipeline pig for oil and gas pipelines of this utility model;

[0023] Figure 2 This is a cross-sectional structural diagram of the support rod for the self-rotating oil and gas pipeline pig of this utility model;

[0024] Figure 3 This is a cross-sectional view of the movable rod of the self-rotating oil and gas pipeline pig of this utility model;

[0025] Figure 4 This utility model relates to a self-rotating pipeline pigging support and walking mechanism for oil and gas pipelines.

[0026] Figure 5 This is a schematic diagram showing the detailed structure of the rotating plate edge of the self-rotating oil and gas pipeline pig of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Housing; 11. Support frame; 12. Mounting plate; 2. Second cleaning mechanism; 21. Second rotating shaft; 211. Support rod; 212. Outer tube; 213. Movable rod; 214. Spring; 215. Mounting block; 216. T-slot; 22. Cleaning brush; 221. First T-block; 23. Cleaning cup; 3. Support walking mechanism; 31. First rotating shaft; 311. Block; 312. Connecting key; 32. Spiral plate; 321. Mounting slot; 322. Pin; 323. Mounting tube; 324. Connecting slot; 33. Roller; 4. Drive motor; 41. Dual-head motor; 42. Battery; 5. Scraper; 51. Connecting rod; 52. Second T-block. Detailed Implementation

[0029] Existing pipeline pigs for oil and gas pipelines have been found to be unstable when driven by gas; while those driven by motors require numerous motors, resulting in heavy counterweights and complex structures, making advancement difficult and causing wear on the cleaning devices. This necessitates frequent pipeline cleaning, reducing the pipeline's normal transport capacity. Therefore, this invention provides a self-rotating pipeline pig that utilizes a motor output shaft aligned with the pipeline's central axis to drive the pig to move centrally within the pipeline, effectively cleaning the pipeline's inner wall.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, 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.

[0031] Based on the above inventive concept, the embodiments of this utility model are described in detail below.

[0032] like Figure 1 As shown, the self-rotating pipeline cleaning device for oil and gas pipelines of this utility model includes a housing 1, a supporting and traveling mechanism 3, and a cleaning cup 23 installed on the outer wall of the housing. The housing 1 is a cylindrical hollow body. A drive motor 4 for providing power is installed inside the housing 1 via a support frame 11, and a battery 42 connected to the drive motor is provided. The output shaft of the drive motor 4 coincides with the central axis of the housing. The first output shaft of the drive motor 4 is detachably connected to the supporting and traveling mechanism 3 via a coupling. The supporting and traveling mechanism 3 includes a first rotating shaft 31 connected to the first output shaft and a spiral plate 32 installed on the first rotating shaft 31. Rollers 33 are evenly provided on the outer edge of the spiral plate 32 to fit against the inner wall of the pipeline. An installation groove 321 is provided on the outer edge of the spiral plate 32. Multiple pins 322 are installed in the installation groove 321. The rollers 33 are rotatably connected to the pins 322 in the installation groove 321. A specific schematic diagram of the installation groove is shown below. Figure 2 As shown. The housing 1 is provided with multiple mounting plates 12, and the cleaning cup 23 is bolted to the mounting plate 12.

[0033] In a basic embodiment, the first rotating shaft 31 is detachably connected to the first output shaft via a coupling, and the spiral plate 32 is fixedly connected to the first rotating shaft 31. Specifically, the spiral plate 32 can be welded to the first rotating shaft 31 or integrally formed with the first rotating shaft 31.

[0034] In other embodiments, the first rotating shaft 31 and the first output shaft are detachably connected via a coupling. The spiral plate 32 is fixedly connected to the mounting tube 323, which is fitted onto the first rotating shaft 31 via a keyway structure and secured with a pressure cap. Specifically, a stop block 311 is provided on the first rotating shaft 31 near the housing 1 outside the housing 1. A connecting key 312 is provided on the right side of the first rotating shaft 31, and an external thread is provided on the outer end of the first rotating shaft 31 away from the housing 1. A nut is installed on the external thread. The spiral plate 32 is fixedly connected to the mounting tube 323, and a connecting groove 324 that mates with the connecting piece 312 is provided on the inner wall of the mounting tube 323. A detailed schematic diagram is shown below. Figure 3 Show.

[0035] The self-rotating pipeline pig of this utility model rotates and advances inside the pipeline. In order to reduce lateral slippage of the rollers and ensure the smooth advance of the pig inside the pipeline, in other embodiments, the roller 33 is a cylindrical roller, and the outer ring of the roller 33 is provided with anti-slip texture.

[0036] When there is a large amount of sediment in the oil and gas pipeline, in order to ensure the cleaning efficiency, the self-rotating oil and gas pipeline cleaning device of this utility model, based on the above-described implementation, has a dual-head motor 41 installed in the housing 1 via a support frame 11 to provide power. The dual-head motor 41 includes a second output shaft opposite in direction to the first output shaft. The second output shaft is detachably connected to a second rotating shaft 21 extending outside the housing. Multiple support rods 211 are vertically fixed or detachably and evenly connected to the second rotating shaft 21 outside the housing. The ends of the support rods 211 near the inner wall of the pipeline are equipped with cleaning brushes 22 and / or scrapers 5 for scraping the inner wall of the pipeline. Specifically, the second rotating shaft 21 can be connected to the second output shaft via a coupling; the support rods 211 can be integrally formed with the second rotating shaft 21 or connected using mounting plates and bolts.

[0037] Oil and gas pipelines often contain complex oil sludge and deposits. To better adapt to oil and deposits of varying thicknesses and ensure cleaning efficiency, this invention's self-rotating pipeline cleaning tool includes an outer tube 212 that is fixedly or detachably connected to a second rotating shaft 21. A movable rod 213 and a spring 214 are sequentially installed within the outer tube 212 via pressure caps. Limiting blocks are provided at the bottom of the outer side wall of the movable rod 213 and the top of the inner side wall of the outer tube 212. A cleaning brush 22 and / or a scraper 5 for scraping the inner wall of the pipeline are installed at the end of the movable rod 213 extending outside the outer tube 212 and near the inner wall. A detailed schematic diagram is shown below. Figure 4 Specifically, the outer tube 212 can be integrally formed with the second rotating shaft 21 or connected using a mounting plate and bolts.

[0038] When the cleaning brush and scraper of the second cleaning mechanism of the pipeline cleaning tool are damaged, in order to facilitate the replacement of the cleaning tools used, the top of the movable rod 213 of the self-rotating oil and gas pipeline cleaning tool of this utility model is provided with a mounting block 215. The mounting block 215 is provided with a T-slot 216. One side of the T-slot 216 extends out of the mounting block 215. The outlet of the T-slot 216 is opposite to the rotation direction of the second rotating rod 21. The bottom end of the cleaning brush 22 is provided with a first T-block 221 that cooperates with the T-slot 216. It also includes a scraper 5. The bottom end of the scraper 5 is provided with a connecting rod 51. The bottom end of the connecting rod 51 is provided with a second T-block 52 that cooperates with the T-slot 216. The installed scraper 5 has a certain bevel angle along the rotation direction of the second rotating shaft 21. The scraper 5, the connecting rod 51 and the second T-block 52 are welded or integrally formed. Specific schematic diagram is shown below. Figure 4 and Figure 5 As shown.

[0039] When using the self-rotating oil and gas pipeline cleaning tool provided by this utility model (taking a pipeline with a large amount of sediment as an example), the cleaning tool is placed inside the oil and gas pipeline to be cleaned. The dual-head motor 41 is started, which drives the second rotating shaft 21 to rotate. The second rotating shaft 21 drives the support rod 211 to rotate, thereby driving the cleaning brush 22 and / or scraper 5 to rotate. First, the oil or sediment deposited inside the pipe wall is scraped and brushed to remove the more stubborn oil or sediment. At the same time, the dual-head motor 41 drives the first rotating shaft 31 to rotate, which drives the spiral plate 32 to rotate. The roller 33 set on the spiral plate rotates in contact with the inner wall of the pipeline, so that the spiral plate 32 pushes the housing 1 forward. The housing 1 drives the cleaning cup 23 forward, scraping away the oil or sediment cleaned by the cleaning brush, thereby completing the cleaning of the inner wall of the pipeline more thoroughly.

[0040] This utility model provides a self-rotating pipeline cleaning tool for oil and gas pipelines. Compared to traditional oil pipeline cleaners, when cleaning pipelines with a large amount of oil and deposits, it first brushes the inner wall of the pipeline and then uses a cleaning cup to scrape it off. This allows for thorough cleaning of even stubborn deposits, reducing the frequency of routine maintenance and ensuring the normal transport capacity of the pipeline. Furthermore, this pipeline cleaning tool has a simple structure, requires no external medium for propulsion, and is convenient to use. The cleaning cup and spiral plate can be selectively installed according to the pipe diameter, making it adaptable to cleaning pipelines of various diameters and enhancing its practicality. Depending on the thickness of the oil and gas deposits in the pipeline, cleaning brushes or scrapers can be installed, or they can be installed intermittently, ensuring that stubborn deposits are thoroughly removed.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A self-rotating pipeline pig for oil and gas pipelines, comprising a housing, a supporting and traveling mechanism, and a cup mounted on the outer wall of the housing, characterized in that: The housing is hollow, and a battery is installed inside the housing. A drive motor for providing power is mounted on the support frame. The output shaft of the drive motor coincides with the central axis of the housing. The first output shaft of the drive motor is detachably connected to a support walking mechanism. The support walking mechanism includes a first rotating shaft connected to the first output shaft and a spiral plate mounted on the first rotating shaft. Rollers that fit into the inner wall of the pipe are evenly distributed on the outer edge of the spiral plate.

2. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 1, characterized in that: The drive motor is a dual-head motor, which includes a second output shaft in the opposite direction to the first output shaft. The second output shaft is detachably connected to a second rotating shaft extending out of the housing. Multiple support rods are vertically fixed or detachably and evenly connected to the second rotating shaft outside the housing. The ends of the support rods near the inner wall of the pipe are equipped with cleaning brushes and / or scrapers for scraping the inner wall of the pipe.

3. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 1 or 2, characterized in that: The first rotating shaft and the first output shaft are detachably connected by a coupling, and the spiral plate is fixedly connected to the first rotating shaft.

4. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 1 or 2, characterized in that: The first rotating shaft and the first output shaft are detachably connected by a coupling. The spiral plate is fixedly connected to the mounting tube. The mounting tube is fitted onto the first rotating shaft through a keyway structure and fixed by a pressure cap.

5. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 1 or 2, characterized in that: The spiral plate has an installation groove on its outer edge, and the roller is mounted on the installation groove by means of a pin.

6. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 5, characterized in that: The roller is a cylindrical roller, and the outer rim of the roller is provided with anti-slip texture.

7. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 2, characterized in that: The support rod includes an outer tube that is fixed or detachably connected to the second rotating shaft. A movable rod and a spring are sequentially installed inside the outer tube cavity via a pressure cap. The end of the movable rod that extends out of the outer tube and is close to the inner wall of the pipe is equipped with a cleaning brush and / or scraper for scraping the inner wall of the pipe.

8. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 7, characterized in that: The movable rod has a mounting block at its top near the inner wall of the pipe, and the mounting block is connected to the cleaning brush and / or scraper by a socket structure.

9. The self-rotating pipeline pigging device for oil and gas pipelines according to claim 1, characterized in that: The housing is provided with multiple mounting plates, and the cup bolts are connected to the mounting plates.

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