Efficient pneumatic wax removal device for oil pipeline

Abstract

The utility model discloses a kind of petroleum pipeline high-efficiency pneumatic wax removal devices, it is related to petroleum pipeline cleaning technical field, including protective sleeve, the drive arrangement is installed in protective sleeve left side below, and lifting rod is arranged in the inside of protective sleeve, and lifting power source is connected in the upper end of lifting rod, the second gear is rotatably connected in the bottom of protective sleeve, and support round plate is connected in the below of second gear, the sleeve pipe is fixedly connected in the bottom of protective sleeve, and lifting rod is penetrated in the inside of sleeve pipe, the bottom end of lifting rod is connected in the middle of the upper surface of carousel, and spiral spring is arranged in the inside of carousel, and a plurality of wax scraping knives are arranged in the outside of spiral spring, collecting box is arranged in the bottom of carousel. The petroleum pipeline high-efficiency pneumatic wax removal device solves the problem that traditional wax removal is not complete, and the adaptability is poor, and wax removal coverage is comprehensive, and it is suitable for different inner diameter and length pipeline, while it is convenient to collect clean wax chip, and it is suitable for petroleum pipeline high-efficiency wax removal.

Description

Technical Field

[0001] This utility model relates to the field of oil pipeline cleaning technology, specifically to a high-efficiency pneumatic dewaxing device for oil pipelines. Background Technology

[0002] Dewaxing of oil pipelines is a crucial process for ensuring oil transportation efficiency. Paraffin wax in crude oil easily precipitates at low temperatures, adhering to the inner wall of the pipeline and forming a wax layer. When the layer reaches a thickness of 5mm, the oil throughput can decrease by more than 20%, and blockages may also occur. Existing dewaxing technologies include mechanical dewaxing, thermal dewaxing, and chemical dewaxing. Wax scrapers remove the wax layer by moving through the pipeline and are suitable for medium- and high-viscosity crude oils. Chemical dewaxing can inhibit wax crystal formation. Dewaxing needs to be performed regularly, especially in cold regions or when transporting crude oil with high wax content. It reduces pipeline energy consumption, avoids downtime and maintenance due to wax blockage, and is an important guarantee for the stable operation of the oil transportation system.

[0003] Existing dewaxing devices, such as the oil pipeline dewaxing device described in application number 202411257680.5, include a cylinder with a rotating drum coaxially connected to one end. Extending telescopic rods are installed on both sides of the rotating drum, with one end of each rod passing through and slidably connected to the side wall of the rotating drum. A dewaxing ball is mounted on the other end of each rod, with multiple spray holes on its outer wall. A drive device is installed inside the cylinder, and a dewaxing agent transmission device is installed inside the rotating drum. The drive device and the dewaxing agent transmission device are connected. The drive device rotates the rotating drum, simultaneously causing the telescopic rods to reciprocate radially along the cylinder and driving the dewaxing agent transmission device to deliver the dewaxing agent through the spray holes. As the rotating drum rotates circumferentially, the dewaxing ball also reciprocates radially, violently impacting the inner wall of the oil pipeline and improving dewaxing efficiency. However, existing dewaxing devices are not thorough enough for thicker wax layers and cannot be adapted to oil pipelines with different inner diameters, resulting in incomplete cleaning.

[0004] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0005] To address the aforementioned issues, an innovative design was developed based on the existing wax removal device. Utility Model Content

[0006] The purpose of this invention is to provide a high-efficiency pneumatic dewaxing device for oil pipelines, in order to solve the problems mentioned in the background art of insufficient cleaning and inability to adapt to oil pipelines with different inner diameters.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency pneumatic dewaxing device for oil pipelines includes a protective sleeve. A drive device is installed on the lower left side of the protective sleeve, and a lifting rod is installed through the inside of the protective sleeve. The upper end of the lifting rod is connected to a lifting power source. A second gear is rotatably connected in a bearing groove at the bottom of the protective sleeve, and a support plate is connected below the second gear. A sleeve is fixedly connected to the bottom end of the protective sleeve, and the lifting rod passes through the inside of the sleeve. The bottom end of the lifting rod is connected to the middle of the upper surface of a turntable, and a helical spring is installed inside the turntable. Several wax scrapers are installed on the outside of the helical spring. A collection box is installed at the bottom of the turntable.

[0008] Preferably, the driving device on the lower left side of the protective cover is a pneumatic motor, and a first gear is connected and installed at the lower output end of the pneumatic motor.

[0009] Using the above technical solution, the pneumatic motor on the left side of the protective sleeve serves as the driving device, with its output end connected to the first gear. The pneumatic drive has a faster response speed than the electric drive and is suitable for the flammable and explosive environment inside oil pipelines, eliminating the risk of electric sparks and providing safe and stable power for subsequent gear transmission.

[0010] Preferably, a second gear is meshed with the right side of the first gear, and the second gear has a ring structure.

[0011] Using the above technical solution, the first gear meshes with the ring-shaped second gear, and the ring structure ensures that the second gear is subjected to uniform force, driving the support plate to rotate smoothly and avoiding wax scraping deviation caused by unstable transmission.

[0012] Preferably, the bottom of the supporting circular plate is fixedly connected to two telescopic rods, and the bottom ends of the telescopic rods are connected to the left and right sides of the upper surface of the turntable.

[0013] The above technical solution is adopted, and the telescopic rod at the bottom of the supporting circular plate is connected to the turntable. It can extend and retract synchronously with the lifting rod, which improves the adaptability compared to the fixed length structure. At the same time, the telescopic rod provides double-sided support for the turntable, which improves the rotational stability.

[0014] Preferably, the turntable has an annular groove in the middle, and a helical spring is engaged inside the annular groove.

[0015] Using the above technical solution, the annular groove inside the turntable limits the spiral spring, preventing it from shifting laterally when under force, and ensuring that the wax scraper always extends and retracts radially along the pipe. Compared with a structure without groove constraint, the positioning accuracy of the wax scraper is improved.

[0016] Preferably, the inner side of the wax scraper is fixed to the outer side of the helical spring by bolts, and the inner end of the wax scraper is horizontally slidably connected to the inner groove of the annular groove to form a limiting structure.

[0017] Using the above technical solution, the wax scraper is fixed to the outside of the spiral spring by bolts, and the inside is slidably connected to the annular groove. The elasticity of the spiral spring can push the wax scraper to adapt to changes in the inner diameter of the pipe, which improves the wax removal coverage compared to a wax scraper in a fixed position. At the same time, the groove restricts the wax scraper from shaking and avoids scratching the inner wall of the pipe.

[0018] Preferably, a mounting column is fixedly connected to the bottom center of the turntable, and the upper surface of the inside of the collection box is fixedly connected to the bottom end of the mounting column, and the upper edge of the collection box has an inner sloping surface structure.

[0019] Using the above technical solution, the collection box connected to the bottom of the turntable by the mounting column has an inner sloping structure on the upper edge that guides the scraped wax debris into the box, reducing wax debris residue compared to no collection structure, preventing wax debris from adhering to the inner wall of the pipe again, and reducing subsequent cleaning costs.

[0020] Compared with the prior art, the beneficial effects of this utility model are: this high-efficiency pneumatic dewaxing device for oil pipelines, 1. Adaptive wax removal, suitable for different pipes and thorough cleaning: The spiral spring pushes the wax scraper to slide along the annular groove, and the scraping radius can be automatically adjusted according to the inner diameter of the pipe; the telescopic rod and the lifting rod adjust the height to ensure that the wax scraper fits tightly against the wax layer, and the wax removal coverage is comprehensive, which improves the cleaning efficiency compared with the fixed structure. 2. High-efficiency transmission and wax debris collection improve operational stability: The pneumatic motor drives the turntable to rotate smoothly through the first gear and the ring second gear. The collection box collects wax debris through the inner inclined surface, improving the collection rate and solving the problem of "incomplete wax removal and wax debris residue" in traditional devices. It is suitable for continuous wax removal operations in long-distance pipelines. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a schematic diagram of the pneumatic motor structure of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the sleeve of this utility model; Figure 4 This is a schematic diagram of the turntable structure of this utility model; Figure 5 This is a schematic diagram of the connection structure of the wax scraper of this utility model; Figure 6 This is a schematic diagram of the bottom structure of the protective sleeve of this utility model.

[0022] In the diagram: 1. Protective sleeve; 101. Bearing groove; 2. Pneumatic motor; 3. First gear; 4. Second gear; 5. Support plate; 6. Telescopic rod; 7. Turntable; 8. Sleeve; 9. Lifting rod; 10. Annular groove; 11. Helical spring; 12. Wax scraper; 13. Mounting column; 14. Collection box. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 This utility model provides a technical solution: A high-efficiency pneumatic dewaxing device for oil pipelines includes a protective sleeve 1. A drive device is installed on the lower left side of the protective sleeve 1, and a lifting rod 9 is installed through the inside of the protective sleeve 1. The upper end of the lifting rod 9 is connected to a lifting power source. A second gear 4 is rotatably connected in the bearing groove 101 at the bottom of the protective sleeve 1, and a support circular plate 5 is connected below the second gear 4. A sleeve 8 is fixedly connected to the bottom end of the protective sleeve 1, and the lifting rod 9 passes through the inside of the sleeve 8. The bottom end of the lifting rod 9 is connected to the middle of the upper surface of a turntable 7. A helical spring 11 is installed inside the turntable 7, and several wax scrapers 12 are installed on the outside of the helical spring 11. A collection box 14 is installed at the bottom of the turntable 7.

[0025] The driving device on the lower left side of the protective sleeve 1 is a pneumatic motor 2, and the output end of the pneumatic motor 2 is connected to and installed with a first gear 3. The right side of the first gear 3 is meshed with a second gear 4, which has a ring structure. Two telescopic rods 6 are fixedly connected to the bottom of the supporting circular plate 5, and the bottom ends of the telescopic rods 6 are connected to the left and right sides of the upper surface of the turntable 7. The pneumatic motor 2 on the left side of the protective sleeve 1 serves as the driving device, and its output end is connected to the first gear 3. The pneumatic drive has a faster response speed than the electric drive and is suitable for the flammable and explosive environment inside the oil pipeline. There is no risk of electric sparks, and it provides safe and stable power for the subsequent gear transmission. The first gear 3 meshes with the ring-shaped second gear 4. At the same time, the ring structure makes the second gear 4 evenly stressed, driving the supporting circular plate 5 to rotate smoothly and avoiding the wax scraping deviation caused by unstable transmission. The telescopic rods 6 at the bottom of the supporting circular plate 5 are connected to the turntable 7 and can extend and retract synchronously with the lifting rod 9, which improves the adaptability compared to the fixed length structure. At the same time, the telescopic rods 6 provide double-sided support for the turntable 7, improving the rotational stability.

[0026] The turntable 7 has an annular groove 10 in the middle, and the helical spring 11 is engaged in the annular groove 10. The inner side of the wax scraper 12 is fixed to the outer side of the helical spring 11 by bolts, and the inner end of the wax scraper 12 is horizontally slidably connected to the inner groove of the annular groove 10 to form a limiting structure. The annular groove 10 inside the turntable 7 limits the helical spring 11 to prevent the spring from shifting laterally when under force, ensuring that the wax scraper 12 always extends and retracts radially along the pipe. Compared with the structure without groove constraint, the positioning accuracy of the wax scraper 12 is improved. The wax scraper 12 is fixed to the outer side of the helical spring 11 by bolts, and the inner side is slidably connected to the groove of the annular groove 10. The elasticity of the helical spring 11 can push the wax scraper 12 to adapt to the change of the inner diameter of the pipe, which improves the wax removal coverage rate compared with the wax scraper 12 in a fixed position. At the same time, the groove restricts the wax scraper 12 from shaking and avoids scratching the inner wall of the pipe.

[0027] The bottom center of the turntable 7 is fixedly connected to the mounting column 13, and the upper surface of the collection box 14 is fixedly connected to the bottom of the mounting column 13. The upper edge of the collection box 14 has an inner slope structure. The collection box 14 connected to the bottom of the turntable 7 through the mounting column 13 has an inner slope structure on the upper edge that can guide the scraped wax debris into the box. Compared with no collection structure, this reduces the wax debris residue, avoids the wax debris from adhering to the inner wall of the pipe again, and reduces the subsequent cleaning cost.

[0028] Working principle: When using this utility model, Power transmission and wax removal adjustment: After the pneumatic motor 2 starts, it drives the second ring gear 4 to rotate through the first gear 3. The second gear 4 drives the support plate 5 and the bottom telescopic rod 6 to rotate. The lifting rod 9 can be connected to the sucker rod traction structure or the pneumatic telescopic machine to lift and lower along the sleeve 8, driving the turntable 7 to adjust the height. The spiral spring 11 extends and retracts in the annular groove 10, pushing the wax scraper 12 to adhere to the inner wall of the pipe. Wax removal and collection: The turntable 7 rotates with the support plate 5, and the wax scraper 12 rotates to scrape off the wax layer on the inner wall of the pipe; the scraped wax shavings slide down the surface of the turntable 7 and are guided into the collection box 14 through the inclined surface; during the operation, the telescopic rod 6 and the spiral spring 11 can automatically adapt to the inner diameter of the pipe to ensure stable wax removal throughout the process.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency pneumatic dewaxing device for oil pipelines, comprising a protective sleeve (1), wherein a driving device is installed on the lower left side of the protective sleeve (1), and a lifting rod (9) is provided through the inside of the protective sleeve (1), and a lifting power source is connected to the upper end of the lifting rod (9), characterized in that: The protective sleeve (1) is rotatably connected to a second gear (4) in the bearing groove (101) at the bottom, and a support circular plate (5) is connected below the second gear (4). The protective sleeve (1) is fixedly connected to a sleeve (8), and a lifting rod (9) passes through the inside of the sleeve (8). The bottom end of the lifting rod (9) is connected to the middle of the upper surface of the turntable (7), and a spiral spring (11) is provided inside the turntable (7). Several wax scrapers (12) are provided on the outside of the spiral spring (11). A collection box (14) is provided at the bottom of the turntable (7).

2. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 1, characterized in that: The driving device on the lower left side of the protective sleeve (1) is a pneumatic motor (2), and a first gear (3) is connected and installed at the lower output end of the pneumatic motor (2).

3. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 2, characterized in that: The first gear (3) is meshed with a second gear (4) on its right side, and the second gear (4) has a ring structure.

4. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 1, characterized in that: The bottom of the supporting circular plate (5) is fixedly connected to two telescopic rods (6), and the bottom ends of the telescopic rods (6) are connected to the left and right sides of the upper surface of the turntable (7).

5. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 1, characterized in that: The turntable (7) has an annular groove (10) in the middle, and the helical spring (11) is engaged in the annular groove (10).

6. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 5, characterized in that: The inner side of the wax scraper (12) is fixed to the outer side of the spiral spring (11) by bolts, and the inner end of the wax scraper (12) is horizontally slidably connected to the inner groove of the annular groove (10) to form a limiting structure.

7. The high-efficiency pneumatic dewaxing device for oil pipelines according to claim 1, characterized in that: The turntable (7) is fixedly connected to the middle of the bottom of the mounting column (13), and the upper surface of the inside of the collection box (14) is fixedly connected to the bottom of the mounting column (13), and the upper edge of the collection box (14) has an inner sloping surface structure.

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