Cathode protection monitoring device for oil and gas pipeline

Abstract

The utility model relates to the technical field of oil and gas pipelines, and discloses a cathode protection monitoring device for an oil and gas pipeline, which comprises an oil and gas pipe, the top end of the outer wall of the oil and gas pipe is fixedly connected with a monitoring pipe, an anode block is arranged in the monitoring pipe, and the anode block is connected with the monitoring pipe through a mounting assembly. According to the cathode protection monitoring device for the oil and gas pipeline, through cooperation of an oil and gas pipe, a monitoring pipe, an anode block and a mounting assembly, a sensor can monitor the upward moving distance of a round block, when the moving distance reaches a preset threshold value of the sensor, the sensor can send a signal to a control module in a box body, and then the control module is started; the control module sends a starting instruction to the alarm, the alarm runs and buzzes to remind a worker to replace the anode block, and in the whole operation process, even if the pressure intensity of a medium in the oil gas pipe changes, the corrosion degree of the anode block can still be accurately monitored, so that the practical performance of the device is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas pipeline technology, specifically to a cathodic protection monitoring device for oil and gas pipelines. Background Technology

[0002] Oil and gas pipelines transport crude oil, refined oil products (such as gasoline and diesel), and natural gas from production sites (oil fields, gas fields) or storage sites (refineries, gas storage facilities) to consumption sites (cities, industrial areas, export terminals) via underground or overhead methods. The outer walls of oil and gas pipelines are generally protected against corrosion by applying anti-corrosion coatings, and in some areas, sacrificial anode welding is used. The inner walls are generally not protected against corrosion. However, due to the presence of water, sulfur, or other impurities in the transported media, long-term operation often leads to perforation corrosion from the inside out. To address these shortcomings, a utility model patent with the public license number CN221217928 U proposes a cathodic protection monitoring device for oil and gas pipelines. It includes an oil and gas pipeline and a monitoring pipe. A hanging ring is fixedly connected inside the monitoring pipe, and a support box is installed inside the monitoring pipe. Although the height position of the sacrificial anode block can be monitored in real time by the built-in sensor under normal pressure in the main pipeline, the pressure of the medium in the main pipeline fluctuates periodically in actual operation (such as changes in the delivery volume or valve opening and closing). Such pressure changes will cause the anode block to be vertically displaced in the monitoring sleeve, thus making it impossible to accurately monitor the degree of corrosion of the anode block when the pressure of the medium in the main pipeline changes. Its practical performance is relatively average. Utility Model Content

[0003] The purpose of this invention is to provide a cathodic protection monitoring device for oil and gas pipelines, which can accurately monitor the degree of corrosion of the anode block even when the pressure of the medium in the main pipeline changes, thereby enhancing its practical performance and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cathodic protection monitoring device for oil and gas pipelines, comprising an oil and gas pipe, a monitoring tube fixedly connected to the top of the outer wall of the oil and gas pipe, an anode block provided inside the monitoring tube, the anode block being connected to the monitoring tube via an installation assembly, the installation assembly comprising: a vertical rod located on the inner wall of the anode block, a horizontal rod fixedly connected to the bottom end of the vertical rod, and abutment rods fixedly connected to both ends of the outer wall of the horizontal rod, the top ends of the abutment rods abutting against the anode block; a sleeve fitted onto the upper part of the outer wall of the vertical rod, a plate fixedly fitted onto the outer wall of the sleeve, first protrusions inserted into both sides of the upper surface of the plate, the first protrusions penetrating the plate and fixedly connected to the anode block, a first nut threaded onto the outer wall of the first protrusions; a vertical cylinder fixedly connected to the upper surface of the plate, a circular plate connected to the top of the vertical cylinder, a sensor mounted on the lower surface of the circular plate, and a... A circular block is fixedly connected to the top of a vertical rod. A gasket is provided below the circular block and fixedly connected to the outer wall of the vertical rod. A compression spring is fixedly connected to the lower surface of the gasket, and the bottom end of the compression spring is fixedly connected to the contact surface of the plate. A baffle is fixedly sleeved on the outer wall of the vertical cylinder. A sealing ring is fixedly connected to the lower surface of the baffle. A ring is pressed against the lower surface of the sealing ring. The outer wall of the ring is fixedly connected to the inner wall of the monitoring tube. Multiple second protrusions are fixedly connected to the upper surface of the ring. The second protrusions pass through the sealing ring and the baffle in sequence. A second nut is threaded to the outer wall of the second protrusion and abuts against the baffle. A cover plate is provided at the top of the monitoring tube. The cover plate is connected to the monitoring tube by a first bolt. A housing is fixedly connected to the lower surface of the cover plate. A box is fixedly connected to the bottom of the inner part of the housing. Alarms are fixedly connected to both sides of the inner part of the housing. A part of the alarm passes through the cover plate.

[0005] Preferably, the upper surface of the cover plate is provided with protective components on both sides. The protective components include: two protective cylinders, which are respectively fixed to the upper surface of the cover plate on both sides. A conical plate is fixed to the top of the protective cylinder. Multiple oblique holes are evenly opened on the outer wall of the protective cylinder. A protective film is fixed to the inner wall of the protective cylinder.

[0006] Preferably, pull rings are fixed to both sides of the upper surface of the baffle.

[0007] Preferably, the inner wall of the monitoring tube is provided with an auxiliary component, the auxiliary component including: a cylinder located inside the monitoring tube, a flexible tube fixed to the outer wall of the cylinder, the outer wall of the flexible tube abutting against the inner wall of the monitoring tube, the cylinder being connected to the monitoring tube by a second bolt, and a flexible ring fixed to the inner wall of the cylinder, the flexible ring abutting against the outer wall of the anode block.

[0008] Preferably, uprights are inserted into both sides of the upper surface of the gasket, and the uprights pass through the gasket and are fixedly connected to the plate.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This cathodic protection monitoring device for oil and gas pipelines has the following advantages over traditional technologies:

[0010] Through the cooperation between the oil and gas pipes, monitoring pipes, anode blocks, and installation components, the volume of the anode block gradually shrinks as corrosion intensifies during long-term use. During this period, the gaskets, vertical rods, horizontal rods, and abutment rods are constantly subjected to the upward force generated by the elastic potential energy of the compression springs. The abutment rod remains in close contact with the lower surface of the anode block. As the volume of the anode block shrinks, the abutment rod, vertical rod, and circular block move upwards. The sensor monitors the upward movement distance of the circular block. When this movement distance reaches the sensor's preset threshold, the sensor sends a signal to the control module inside the housing. Subsequently, the control module sends a start command to the alarm, which activates and emits a buzzer sound, reminding the staff to replace the anode block. Throughout the entire operation, there is no need to worry about the anode block being affected by the pressure of the medium inside the oil and gas pipes. Even if the pressure of the medium inside the oil and gas pipes changes, the degree of corrosion of the anode block can still be accurately monitored, thereby enhancing the practical performance of the device.

[0011] Through the cooperation of oil and gas pipes, monitoring pipes, anode blocks, mounting components and protective components, the casing and conical plate can effectively shield and protect the internal alarm, thereby extending the service life of the alarm. In addition, the oblique holes opened on the outer wall of the casing allow the buzzing sound generated by the alarm to be transmitted outward.

[0012] Through the cooperation between the oil and gas pipe, monitoring pipe, anode block, installation components and auxiliary components, the soft ring fixed to the inner wall of the cylinder and the top of the outer wall of the anode block can be tightly abutted, which can effectively isolate the internal medium of the oil and gas pipe from the threaded connection between the first nut and the first protruding rod, thereby ensuring smooth operation when the first nut is turned counterclockwise in the future, and facilitating the disassembly and replacement of the anode block. Attached Figure Description

[0013] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0018] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0019] Figure 6 for Figure 2 Enlarged view of point D in the middle.

[0020] In the diagram: 1. Oil and gas pipe, 2. Monitoring pipe, 3. Anode block, 4. Vertical rod, 5. Horizontal rod, 6. Support rod, 7. Sleeve, 8. Plate, 9. First protruding rod, 10. First nut, 11. Vertical cylinder, 12. Circular plate, 13. Sensor, 14. Circular block, 15. Washer, 16. Compression spring, 17. Baffle, 18. Sealing ring, 19. Circular ring, 20. Second protruding rod, 21. Second nut, 22. Cover plate, 23. First bolt, 24. Housing, 25. Box body, 26. Alarm, 27. Protective sleeve, 28. Conical plate, 29. Angled hole, 30. Protective membrane, 31. Pull ring, 32. Flexible ring, 33. Cylinder, 34. Flexible cylinder, 35. Second bolt, 36. Vertical rod. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-6This utility model provides a technical solution: a cathodic protection monitoring device for oil and gas pipelines, including an oil and gas pipe 1, a monitoring pipe 2 fixedly connected to the top of the outer wall of the oil and gas pipe 1, an anode block 3 provided inside the monitoring pipe 2, the anode block 3 being connected to the monitoring pipe 2 via an installation assembly, the installation assembly including: a vertical rod 4, the vertical rod 4 being located on the inner wall of the anode block 3, a horizontal rod 5 fixedly connected to the bottom end of the vertical rod 4, and abutment rods 6 fixedly connected to both ends of the outer wall of the horizontal rod 5, the top ends of the abutment rods 6 being pressed against the anode block 3, and the vertical rod 4... A sleeve 7 is fitted onto the upper part of the outer wall. A plate 8 is fixedly fitted onto the outer wall of the sleeve 7. First protruding rods 9 are inserted into both sides of the upper surface of the plate 8. The first protruding rods 9 penetrate the plate 8 and are fixedly connected to the anode block 3. A first nut 10 is threaded onto the outer wall of the first protruding rod 9. A vertical cylinder 11 is fixedly connected to the upper surface of the plate 8. A circular plate 12 is connected to the top of the vertical cylinder 11. A sensor 13 is installed on the lower surface of the circular plate 12. A circular block 14 is provided below the sensor 13. The circular block 14 is fixed to the top of the vertical rod 4. A gasket 15 is provided below the circular block 14, and the gasket 15 is fixedly connected to the outer wall of the vertical rod 4. A compression spring 16 is fixedly connected to the lower surface of the gasket 15, and the bottom end of the compression spring 16 is fixedly connected to the contact surface of the plate 8. A baffle 17 is fixedly sleeved on the outer wall of the vertical cylinder 11, and a sealing ring 18 is fixedly connected to the lower surface of the baffle 17. A ring 19 is pressed against the lower surface of the sealing ring 18, and the outer wall of the ring 19 is fixedly connected to the inner wall of the monitoring tube 2. Multiple second protrusions 20 are fixedly connected to the upper surface of the ring 19. The second protruding rod 20 passes through the sealing ring 18 and the baffle 17 in sequence. The outer wall of the second protruding rod 20 is threaded with a second nut 21, which abuts against the baffle 17. The top of the monitoring tube 2 is provided with a cover plate 22, which is connected to the monitoring tube 2 by a first bolt 23. The lower surface of the cover plate 22 is fixedly connected to a housing 24. The bottom of the housing 24 is fixedly connected to a box 25. Alarms 26 are fixedly connected to both sides of the inside of the housing 24. A part of the alarm 26 passes through the cover plate 22.

[0023] In specific implementation, it is worth noting that the anode block 3 can be made of materials commonly used in oil and gas pipelines, such as magnesium alloy, zinc alloy, and aluminum alloy. This application does not limit the specific material of the anode block 3, as long as it meets the usage requirements. The outer wall of the vertical rod 4 is clearance-fitted with the inner wall of the anode block 3. The sleeve 7 is made of fluororubber and has a certain degree of flexibility. The inner wall of the sleeve 7 abuts against the outer wall of the vertical rod 4. The circular plate 12 is connected to the vertical cylinder 11 by screws. The sensor 13 is a laser distance sensor, which is electrically connected to the internal module components of the housing 25 through wires. The wire length is sufficient to meet the disassembly and displacement requirements of the cover plate 22. The elastic coefficient of the compression spring 16 is 2N-5N / CM. The sealing ring 18 is made of fluororubber. The box 25 is equipped with a battery and control module, which can power the sensor 13 and the alarm 26. When the circular block 14 moves upward to the preset threshold of the sensor 13, the sensor 13 will send a signal to the control module inside the box 25. Subsequently, the control module sends a start command to the alarm 26. The alarm 26 runs and emits a buzzer. The sound-emitting part of the alarm 26 penetrates the cover plate 22.

[0024] Furthermore, protective components are provided on both sides of the upper surface of the cover plate 22. The protective components include: two protective cylinders 27, which are respectively fixed to both sides of the upper surface of the cover plate 22. A conical plate 28 is fixed to the top of the protective cylinder 27. Multiple oblique holes 29 are evenly opened on the outer wall of the protective cylinder 27. A protective film 30 is fixed to the inner wall of the protective cylinder 27.

[0025] In the specific implementation process, it is worth noting that the casing 27 and the conical plate 28 can effectively shield and protect the internal alarm 26, thereby extending the service life of the alarm 26. In addition, the oblique hole 29 opened on the outer wall of the casing 27 allows the buzzing sound generated by the alarm 26 during operation to spread outward. The protective membrane 30 is a polytetrafluoroethylene waterproof and breathable membrane, which can prevent external moisture from entering the interior of the casing 27 while maximizing the diffusion of sound.

[0026] Furthermore, pull rings 31 are fixed to both sides of the upper surface of the baffle 17.

[0027] In the specific implementation process, it is worth noting that the pull ring 31 is designed to facilitate the operator to apply force to the baffle 17 when installing and replacing the anode block 3.

[0028] Furthermore, the inner wall of the monitoring tube 2 is provided with an auxiliary component, which includes: a cylinder 33 located inside the monitoring tube 2; a flexible cylinder 34 fixedly connected to the outer wall of the cylinder 33; the outer wall of the flexible cylinder 34 abutting against the inner wall of the monitoring tube 2; the cylinder 33 connected to the monitoring tube 2 by a second bolt 35; and a flexible ring 32 fixedly connected to the inner wall of the cylinder 33; the flexible ring 32 abutting against the outer wall of the anode block 3.

[0029] In the specific implementation process, it is worth noting that both the soft cylinder 34 and the soft ring 32 are made of fluororubber, which has a certain degree of flexibility. The soft ring 32 fixed to the inner wall of the cylinder 33 is in close contact with the top of the outer wall of the anode block 3, which can effectively isolate the internal medium of the oil and gas pipe 1 from the threaded connection between the first nut 10 and the first protruding rod 9, thereby ensuring smooth operation when the first nut 10 is rotated counterclockwise in the future.

[0030] Furthermore, uprights 36 are inserted into both sides of the upper surface of the gasket 15, and the uprights 36 penetrate the gasket 15 and are fixedly connected to the plate 8.

[0031] In the specific implementation process, it is worth noting that the clearance fit between the outer wall of the upright 36 and the through surface of the pad 15 can improve the stability of the pad 15 during its up and down movement.

[0032] Working principle:

[0033] Protective measures for oil and gas pipelines:

[0034] When the medium flows inside the oil and gas pipe 1, the anode block 3 can become the preferred site for corrosion reaction, thereby protecting the oil and gas pipe 1 body from corrosion (the principle of the anode block 3 protecting the oil and gas pipe 1 is based on the cathodic protection technology of sacrificial anode, which makes the metal structure of the pipe a cathode through electrochemical principle, thereby inhibiting the corrosion reaction).

[0035] Precise monitoring of corrosion on anode blocks:

[0036] During long-term use, as the corrosion of the anode block 3 intensifies, its volume gradually shrinks. During this period, the gasket 15, vertical rod 4, horizontal rod 5, and abutment rod 6 are always subjected to the upward force generated by the elastic potential energy of the compression spring 16. The abutment rod 6 will always be in close contact with the lower surface of the anode block 3. As the volume of the anode block 3 shrinks, the abutment rod 6, vertical rod 4, and round block 14 will move upward accordingly. The sensor 13 will monitor the upward movement distance of the round block 14. When the movement distance reaches the preset threshold of the sensor 13, the sensor 13 will send a signal to the control module inside the box 25. Subsequently, the control module sends a start command to the alarm 26. The alarm 26 runs and emits a buzzer sound to remind the staff to replace the anode block 3. During the entire operation, there is no need to worry about the anode block 3 being affected by the pressure of the medium inside the oil and gas pipe 1. Even if the pressure of the medium inside the oil and gas pipe 1 changes, the degree of corrosion of the anode block 3 can still be accurately monitored.

[0037] Subsequent anode replacement work:

[0038] When the anode block 3 needs to be disassembled and replaced, the flow of the medium inside the oil and gas pipe 1 should be stopped and the medium drained first. Then, turn the first bolt 23 counterclockwise to separate it from the monitoring pipe 2, and remove the cover plate 22 at the top of the monitoring pipe 2. During the operation, the wire connecting the sensor 13 and the control module inside the box 25 is long enough to meet the disassembly displacement requirements of the cover plate 22. Next, turn the second nut 21 counterclockwise to separate it from the second protruding rod 20, and pull the pull ring 31 upward to remove the baffle 17, the vertical cylinder 11, the plate 8, and the anode block 3 as a whole. Then, turn the first bolt 23 counterclockwise. A nut 10 is used to separate it from the first protruding rod 9, thereby removing the corroded anode block 3 and installing a new anode block 3. Finally, the disassembled parts are reset to ensure that the oil and gas pipe 1 is properly protected during the next medium flow. It should be noted that if the contact force between the inner wall of the soft ring 32 and the outer wall of the anode block 3 is significantly reduced after the new anode block 3 is installed inside the monitoring pipe 2, the anode block 3 needs to be pulled out again, and the second bolt 35 is turned counterclockwise to remove the cylinder 33 and the soft ring 32 and replace it with a new soft ring 32, thereby ensuring that the soft ring 32 is in close contact with the outer wall of the anode block 3.

[0039] 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 cathodic protection monitoring device for oil and gas pipelines, comprising an oil and gas pipeline (1), characterized in that: A monitoring tube (2) is fixedly connected to the top of the outer wall of the oil and gas pipe (1). An anode block (3) is provided inside the monitoring tube (2). The anode block (3) is connected to the monitoring tube (2) through an installation assembly. The installation assembly includes: a vertical rod (4), which is located on the inner wall of the anode block (3). A horizontal rod (5) is fixedly connected to the bottom end of the vertical rod (4). A stop rod (6) is fixedly connected to both ends of the outer wall of the horizontal rod (5). The top end of the stop rod (6) abuts against the anode block (3). A sleeve (7) is sleeved on the upper part of the outer wall of the vertical rod (4). A plate (8) is fixedly sleeved on the outer wall of the sleeve (7). The upper surface of the plate (8) is provided with first protruding rods (9) inserted on both sides. The first protruding rods (9) penetrate the plate (8) and are fixedly connected to the anode block (3). The outer wall of the first protruding rod (9) is threaded with a first nut (10). The upper surface of the plate (8) is fixedly connected with a vertical cylinder (11). The top of the vertical cylinder (11) is connected with a circular plate (12). The lower surface of the circular plate (12) is equipped with a sensor (13). A circular block (14) is provided below the sensor (13). The circular block (14) is fixedly connected to the top of the vertical rod (4). A gasket (15) is provided below the circular block (14). The gasket (15) is fixedly connected to the outer wall of the vertical rod (4). A compression spring (16) is fixedly connected to the lower surface of the gasket (15). The bottom end of the compression spring (16) is fixedly connected to the contact surface of the plate (8). A baffle (17) is fixedly sleeved on the outer wall of the vertical cylinder (11). A sealing ring (18) is fixedly connected to the lower surface of the baffle (17). A ring (19) is pressed against the lower surface of the sealing ring (18). The outer wall of the ring (19) is fixedly connected to the inner wall of the monitoring tube (2). A plurality of second protrusions (20) are fixedly connected to the upper surface of the ring (19). The second protrusions (20) are sequentially... The sealing ring (18) and the baffle (17) are connected together. The outer wall of the second protruding rod (20) is threaded with a second nut (21). The second nut (21) abuts against the baffle (17). The top of the monitoring tube (2) is provided with a cover plate (22). The cover plate (22) is connected to the monitoring tube (2) by a first bolt (23). The lower surface of the cover plate (22) is fixed with a housing (24). The bottom of the housing (24) is fixed with a box body (25). Both sides of the inside of the housing (24) are fixed with an alarm (26). A part of the alarm (26) penetrates the cover plate (22).

2. The cathodic protection monitoring device for oil and gas pipelines according to claim 1, characterized in that: The cover plate (22) has protective components on both sides of its upper surface. The protective components include two protective cylinders (27), which are respectively fixed to both sides of the upper surface of the cover plate (22). A conical plate (28) is fixed to the top of the protective cylinder (27). Multiple oblique holes (29) are evenly opened on the outer wall of the protective cylinder (27). A protective film (30) is fixed to the inner wall of the protective cylinder (27).

3. The cathodic protection monitoring device for oil and gas pipelines according to claim 1, characterized in that: Pull rings (31) are fixed to both sides of the upper surface of the baffle (17).

4. The cathodic protection monitoring device for oil and gas pipelines according to claim 1, characterized in that: The inner wall of the monitoring tube (2) is provided with an auxiliary component, which includes: a cylinder (33), the cylinder (33) is located inside the monitoring tube (2), a flexible cylinder (34) is fixed to the outer wall of the cylinder (33), the outer wall of the flexible cylinder (34) abuts against the inner wall of the monitoring tube (2), the cylinder (33) is connected to the monitoring tube (2) by a second bolt (35), and a flexible ring (32) is fixed to the inner wall of the cylinder (33), the flexible ring (32) abuts against the outer wall of the anode block (3).

5. The cathodic protection monitoring device for oil and gas pipelines according to claim 1, characterized in that: Uprights (36) are inserted into both sides of the upper surface of the gasket (15), and the uprights (36) pass through the gasket (15) and are fixedly connected to the plate (8).

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