An oil leakage monitoring device for a pipeline

Abstract

This invention discloses a pipeline oil leakage monitoring device, belonging to the field of pipeline transportation monitoring technology. The device includes an upper ring and a lower ring, with connecting components on both sides of the upper and lower rings. Each of the upper and lower rings contains an internal sealing assembly. The internal sealing assembly includes an assembly chamber located inside the upper and lower rings, and a sealing chamber located inside the assembly chamber, with the assembly chamber and sealing chamber interconnected. In this invention, the assembly chamber and sealing chamber are connected. An oil-absorbing sponge absorbs oil and expands, generating pressure. A flexible sealing gasket maintains the sealing effect, and a pressure sensor detects the expansion and triggers an alarm. The pressure plate is made of an elastic and hard material. The expansion of the oil-absorbing sponge compresses the pressure plate, causing its end to tilt and compress the flexible sealing gasket, increasing the end pressure and enhancing the seal. The coordinated operation of these structures effectively achieves oil leakage detection and sealing, reducing purchase costs and minimizing environmental impact.

Description

Technical Field

[0001] This invention relates to the field of pipeline transportation monitoring, and in particular to a pipeline oil leakage prevention monitoring device. Background Technology

[0002] Pipelines are systems composed of pipes, fittings, and valves connected together to guide the directional flow of fluids and facilitate the transport of materials. They can be laid in the external environment, such as long-distance pipelines transporting natural gas and oil across regions, ensuring a stable energy supply through underground or overhead methods; they can also be integrated into various devices, such as pipelines transporting raw materials in chemical equipment; in the automotive field, pipelines are distributed in fuel systems, braking systems, and other parts, respectively undertaking functions such as fuel delivery and brake fluid transmission.

[0003] In oil pipelines, joints are prone to stress-bearing weaknesses due to structural discontinuities. When the pipeline is subjected to external impact or continuous vibration, the stress concentration effect at these points is significant, making them more susceptible to metal fatigue or seal failure than other areas, thus leading to oil leakage. Current technologies typically employ leak detection lines, fiber optic sensors, and ultrasonic flow measurement devices to monitor pipeline status in real time, ensuring timely detection and handling of leaks.

[0004] The shortcomings of the existing technical solutions are as follows: In oil pipeline monitoring, devices such as oil leak detection lines have significant problems. On the one hand, their purchase cost is high, increasing operating costs. On the other hand, some sensors are sensitive to the environment; for example, changes in temperature and humidity can interfere with signal transmission of fiber optic sensors, greatly reducing detection accuracy and leading to false alarms or no alarms at all. Summary of the Invention

[0005] This invention provides a pipeline oil leakage monitoring device, which can solve the problems of high purchase cost and susceptibility to environmental influences in existing oil leakage monitoring devices.

[0006] A pipeline oil leakage monitoring device includes an upper ring and a lower ring. Connecting components are provided on both sides of the upper and lower rings for fixing them to an oil pipe. An internal sealing assembly is provided inside each of the upper and lower rings to maintain a sealed connection at the oil pipe interface. The internal sealing assembly includes an assembly chamber located inside the upper and lower rings, and a sealing chamber located inside the assembly chamber, which are interconnected. An oil-absorbing sponge is installed inside the assembly chamber; the sponge expands upon contact with oil. Flexible sealing gaskets are provided on both sides of the sealing chamber, located inside the upper and lower rings and in direct contact with the pipeline surface to maintain a sealing effect. A pressure sensor is also installed inside the assembly chamber to detect the expansion state of the oil-absorbing sponge.

[0007] As a further aspect of the present invention: pressure plates are also provided on both sides of the assembly chamber. The pressure plates are made of elastic material and the hardness of the pressure plates is greater than that of the flexible sealing gasket. After the oil-absorbing sponge expands, it will squeeze the pressure plates, causing the ends of the pressure plates to tilt and squeeze towards the flexible sealing gasket.

[0008] As a further aspect of the present invention: the oil-absorbing sponge has an absorption cavity in the middle to increase the contact area between the oil and the oil-absorbing sponge, and the flexible sealing gasket has an oil leakage port in the middle that is connected to the absorption cavity to adapt to the pipeline interface.

[0009] As a further aspect of the present invention: upper extension plates are provided on both sides of the upper ring sleeve, and lower extension plates are provided on both sides of the lower ring sleeve. Each set of upper and lower extension plates is adapted to the shape of the corresponding sealing chamber, thereby increasing the contact area.

[0010] As a further aspect of the present invention, the assembly chamber is further provided with an expansion component to increase the pressure borne by the pressure plate.

[0011] As a further embodiment of the present invention: the expansion assembly includes a heat-insulating shell disposed inside the assembly chamber, a buffer chamber disposed inside the heat-insulating shell, an inner cylinder fixedly disposed on one side of the heat-insulating shell, the inner cylinder extending into the buffer chamber, an exhaust port communicating with the buffer chamber being opened at the bottom of the inner cylinder, a pressure block being slidably fitted inside the inner cylinder, the pressure block and the bottom of the inner cylinder being filled with sodium azide, an expansion tube being disposed inside the assembly chamber, and a conveying channel being disposed between the heat-insulating shell and the expansion tube.

[0012] As a further aspect of the present invention, the conveying channel is configured as a skirt-shaped channel structure to increase the air delivery volume.

[0013] As a further aspect of the present invention: the buffer chamber is surrounded by a buffer wall.

[0014] As a further embodiment of the present invention: the connecting assembly includes threaded rods fixedly disposed on both sides of the upper ring sleeve, connecting blocks fixedly disposed on both sides of the lower ring sleeve, the connecting blocks having assembly holes that cooperate with the threaded rods, and fastening nuts threadedly engaged on the threaded rods.

[0015] As a further aspect of the present invention, the oil-absorbing sponge is detachably connected to the assembly chamber.

[0016] The beneficial effects of this invention are: 1. In this invention, the upper and lower ring sleeves are connected by a threaded rod, a connecting block, and a fastening nut to form a circular sleeve structure, adaptable to the outside of the pipeline. In the inner sealing assembly, the assembly chamber and the sealing chamber are connected. The oil-absorbing sponge absorbs oil and expands to generate pressure, the flexible sealing gasket maintains the sealing effect, and the pressure sensor detects the expansion state and triggers an alarm. The pressure plate is made of an elastic and hard material. The expansion of the oil-absorbing sponge squeezes the pressure plate, causing its end to tilt and squeeze the flexible sealing gasket, increasing the end pressure and enhancing the seal. All structures work together to effectively achieve oil leakage detection and sealing, reducing purchase costs and minimizing environmental impact.

[0017] 2. In this invention, the inner cylinder's pressure block works in conjunction with sodium azide. The oil-absorbing sponge expands and squeezes the pressure block, causing the sodium azide to rapidly decompose and generate nitrogen gas. The nitrogen gas quickly enters the expansion tube through the skirt-shaped channel structure, causing it to bulge and further squeeze the oil-absorbing sponge. This allows the flexible sealing gasket to withstand greater pressure, enhancing the sealing effect. Simultaneously, the buffer wall within the buffer chamber buffers the nitrogen gas impact, preventing damage to the delivery channel and expansion tube, ensuring stable operation of the device, effectively addressing pressure caused by oil leakage in the pipeline, and improving the device's reliability. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a pipeline oil leakage prevention monitoring device provided by the present invention; Figure 2 A bottom view of the structure of a pipeline oil leakage prevention monitoring device provided by the present invention; Figure 3 A schematic diagram of the longitudinal section structure of a pipeline oil leakage prevention monitoring device provided by the present invention; Figure 4 This is a schematic diagram of the first embodiment of a pipeline oil leakage prevention monitoring device provided by the present invention; Figure 5 This is a schematic diagram of the second embodiment of the pipeline oil leakage prevention monitoring device provided by the present invention; Figure 6 A schematic diagram of the conveying channel structure of a pipeline oil leakage prevention monitoring device provided by the present invention; Figure 7 for Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0019] Explanation of reference numerals in the attached figures: 1. Upper ring sleeve; 101. Upper extension edge plate; 102. Threaded rod; 2. Lower ring sleeve; 201. Lower extension edge plate; 202. Connecting block; 203. Assembly hole; 3. Inner sealing assembly; 301. Assembly chamber; 302. Sealing chamber; 303. Oil-absorbing sponge; 304. Pressure plate; 305. Flexible sealing gasket; 306. Absorption chamber; 307. Oil leakage port; 4. Expansion assembly; 401. Heat insulation shell; 402. Buffer chamber; 403. Inner cylinder; 405. Exhaust port; 406. Buffer wall; 407. Sodium azide; 408. Pressure block; 409. Conveying channel; 410. Expansion tube; 5. Pressure sensor; 6. Fastening nut. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 7 As shown in the figure, an embodiment of the present invention provides a pipeline oil leakage monitoring device, including an upper ring sleeve 1 and a lower ring sleeve 2. The upper ring sleeve 1 and the lower ring sleeve 2 can be interlocked to form a circular sleeve structure. This structure can be used with the outer side of a pipeline with the same inner diameter. Threaded rods 102 are fixedly provided on both sides of the upper ring sleeve 1, and connecting blocks 202 are fixedly provided on both sides of the lower ring sleeve 2. The connecting blocks 202 have assembly holes 203 that cooperate with the threaded rods 102, and fastening nuts 6 are threaded onto the threaded rods 102. In actual installation, after inserting the threaded rods 102 into the assembly holes 203, the fastening nuts 6 are tightened to firmly fix the threaded rods 102 onto the connecting blocks 202, thereby achieving a tight connection between the upper ring sleeve 1 and the lower ring sleeve 2.

[0022] Both the upper ring sleeve 1 and the lower ring sleeve 2 are equipped with internal sealing components 3, whose main function is to maintain the sealing state of the oil pipe interface. The internal sealing component 3 includes an assembly chamber 301 disposed inside the upper ring sleeve 1 and the lower ring sleeve 2, and a sealing chamber 302 disposed inside the assembly chamber 301, such as... Figure 4As shown, the assembly chamber 301 and the sealing chamber 302 are interconnected. An oil-absorbing sponge 303 is installed inside the assembly chamber 301. Upon contact with oil, the oil-absorbing sponge 303 expands; for example, it can be a graphene sponge, expanding its volume dozens of times after absorbing oil, thus generating pressure. Flexible sealing gaskets 305 are installed on both sides inside the sealing chamber 302. These flexible sealing gaskets 305 are preferably made of silicone or rubber, which have good flexibility and sealing properties. The flexible sealing gaskets 305 are located inside the upper ring 1 and lower ring 2, directly contacting the pipeline surface to maintain a sealing effect. A pressure sensor 5 is also installed inside the assembly chamber 301, which detects the expansion state of the oil-absorbing sponge 303. When the oil-absorbing sponge 303 expands, it compresses the pressure sensor 5, and the pressure sensor 5 sends an alarm signal upon sensing the pressure change. Furthermore, the pressure sensor 5 is located inside the lower ring 2, not in direct contact with the outside environment, thus minimizing external influences and enabling more accurate detection of oil leaks. The oil-absorbing sponge 303 has an absorption cavity 306 in the middle. The absorption cavity 306 is a channel that runs annularly along the inner sealing component 3. This design increases the contact area between the oil and the oil-absorbing sponge 303, allowing the sponge 303 to absorb the leaked oil more effectively. It also facilitates the flow of oil and prevents oil accumulation. The flexible sealing gasket 305 has an oil leakage port 307 in the middle that communicates with the absorption cavity 306. Its function is to adapt to the pipeline interface so that the leaked oil can smoothly enter the absorption cavity 306.

[0023] In the specific operation of the above embodiment, when oil leakage occurs at the pipeline weld, the oil first enters the absorption chamber 306 through the leak port 307, and then flows along the absorption chamber 306 or soaks to the bottom. As the oil enters, the oil-absorbing sponge 303 at the bottom absorbs the oil and expands, thereby squeezing the pressure sensor 5. The pressure sensor 5 then sends an alarm signal, thus detecting the oil leakage. At the same time, the expansion of the oil-absorbing sponge 303 also squeezes the flexible sealing gasket 305, making the flexible sealing gasket 305 fit more tightly against the pipeline surface, thereby improving its sealing effect and preventing further oil leakage.

[0024] In another optional embodiment, pressure plates 304 may be provided on both sides of the assembly chamber 301. The pressure plates 304 are made of an elastic material, and their hardness is greater than that of the flexible sealing gasket 305. When the oil-absorbing sponge 303 expands, it will compress the pressure plates 304, causing the ends of the pressure plates 304 to tilt and press against the flexible sealing gasket 305. Because the pressure plates 304 have a certain degree of elasticity and hardness, the pressure at their ends will be greater than the pressure exerted on the flexible sealing gasket 305 by other parts. This increases the pressure borne by the flexible sealing gasket 305 at its ends, thereby improving the sealing effect and better preventing oil leakage.

[0025] In this embodiment, as Figure 4 As shown, upper extension plates 101 are provided on both sides of the upper ring sleeve 1, and lower extension plates 201 are provided on both sides of the lower ring sleeve 2. Each set of upper extension plates 101 and lower extension plates 201 is adapted to the shape of the corresponding sealing chamber 302. This increases the contact area, making the connection between the upper ring sleeve 1 and the lower ring sleeve 2 and the pipeline more stable and improving the reliability of the entire device. In addition, the oil-absorbing sponge 303 is detachably connected to the assembly chamber 301, which facilitates replacement after the oil-absorbing sponge 303 is worn out, reducing maintenance costs.

[0026] The pipeline generally has a large oil pressure. When this oil pressure leaks, it will create huge pressure inside the upper ring sleeve 1 and the lower ring sleeve 2. This pressure will have a certain impact on the sealing effect of the device.

[0027] In the second specific embodiment, in order to further improve the sealing performance of the device, an expansion component 4 is also provided inside the assembly chamber 301. Its main function is to increase the pressure borne by the pressure plate 304 and reduce the possibility of oil leakage.

[0028] The expansion assembly 4 includes a heat-insulating shell 401 disposed inside the assembly chamber 301, and a buffer chamber 402 disposed inside the heat-insulating shell 401. The buffer chamber 402 and the heat-insulating shell 401 can prevent heat leakage and reduce the impact of temperature on other components of the device. An inner cylinder 403 is fixedly disposed on one side of the heat-insulating shell 401, and the inner cylinder 403 extends into the buffer chamber 402. The bottom of the inner cylinder 403 has an exhaust port 405 that communicates with the buffer chamber 402. A pressure block 408 is slidably fitted inside the inner cylinder 403. The pressure block 408 and the inner cylinder 403 slide in a sealed manner, which can prevent oil from entering the buffer chamber 402 and ensure the normal operation of the device. Sodium azide 407 is filled into the pressure block 408 and the bottom of the inner cylinder 403. When the sodium azide 407 is compressed, it decomposes to release nitrogen gas, and heat is released during the decomposition reaction. The heat insulation shell 401 can reduce the impact of heat on the oil-absorbing sponge 303 and prevent the performance of the oil-absorbing sponge 303 from being affected by excessive temperature. An expansion tube 410 is provided inside the assembly chamber 301, and a conveying channel 409 is provided between the heat insulation shell 401 and the expansion tube 410 for conveying the generated nitrogen gas to the expansion tube 410.

[0029] In the specific operation of this embodiment, when the oil-absorbing sponge 303 expands and squeezes the pressure block 408, the pressure block 408 squeezes the sodium azide 407. The sodium azide 407, after being squeezed, rapidly decomposes to generate nitrogen gas within a short time. The nitrogen gas enters the expansion tube 410 through the delivery channel 409. The expansion tube 410 bulges under the nitrogen gas, further squeezing the oil-absorbing sponge 303, causing the flexible sealing gasket 305 to be subjected to greater pressure, thereby enhancing the sealing effect. The delivery channel 409 is designed with a skirt-shaped channel structure to increase the gas delivery volume, allowing the nitrogen gas to enter the expansion tube 410 more quickly and fully.

[0030] To prevent nitrogen from being generated too quickly and causing damage to the device, a buffer wall 406 is arranged around the inside of the buffer chamber 402. The buffer wall 406 can play a buffering role to prevent nitrogen from impacting and damaging the delivery channel 409 and the expansion pipe 410, thus ensuring the stable operation of the device.

[0031] Working principle: When oil leaks at the pipeline weld, the oil first enters the absorption chamber 306 in the middle of the oil-absorbing sponge 303 through the oil leak port 307 in the middle of the flexible sealing gasket 305, and then flows along the absorption chamber 306 or soaks to the bottom. As the oil enters, the oil-absorbing sponge 303 at the bottom begins to absorb the oil and expands.

[0032] After the oil-absorbing sponge 303 expands, it will squeeze the pressure sensor 5 on the one hand, and the pressure sensor 5 will send an alarm signal after sensing the pressure change to realize the detection of oil leakage; on the other hand, it will squeeze the pressure plate 304, causing the end of the pressure plate 304 to tilt and squeeze the flexible sealing gasket 305, increasing the pressure borne by the flexible sealing gasket 305 at the end position, thereby better preventing oil leakage.

[0033] When the oil-absorbing sponge 303 expands and compresses the pressure block 408, the pressure block 408 compresses the sodium azide 407, which rapidly decomposes to generate nitrogen gas. The nitrogen gas enters the expansion tube 410 through the delivery channel 409. The expansion tube 410 bulges under the nitrogen gas, further compressing the oil-absorbing sponge 303, thus subjecting the flexible sealing gasket 305 to greater pressure and enhancing the sealing effect. Simultaneously, the buffer wall 406 surrounding the buffer chamber 402 prevents excessively rapid nitrogen generation from damaging the device, ensuring stable operation.

[0034] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pipeline oil leakage monitoring device, comprising an upper ring sleeve (1) and a lower ring sleeve (2), wherein connecting components are provided on both sides of the upper ring sleeve (1) and the lower ring sleeve (2) for fixing the upper ring sleeve (1) and the lower ring sleeve (2) to an oil pipeline, characterized in that: Both the upper ring sleeve (1) and the lower ring sleeve (2) are provided with an internal sealing assembly (3) to maintain the sealing state of the oil pipe interface; The inner sealing assembly (3) includes an assembly chamber (301) disposed inside the upper ring sleeve (1) and the lower ring sleeve (2), and a sealing chamber (302) disposed inside the assembly chamber (301), wherein the assembly chamber (301) and the sealing chamber (302) are interconnected. The assembly chamber (301) is equipped with an oil-absorbing sponge (303). The oil-absorbing sponge (303) will expand after contact with oil. Flexible sealing gaskets (305) are provided on both sides inside the sealing chamber (302). The flexible sealing gaskets (305) are located inside the upper ring (1) and the lower ring (2) and are in direct contact with the surface of the pipeline to maintain the sealing effect. A pressure sensor (5) is also installed inside the assembly chamber (301) to detect the expansion state of the oil-absorbing sponge (303).

2. The pipeline oil leakage prevention monitoring device as described in claim 1, characterized in that, The assembly chamber (301) is also provided with pressure plates (304) on both sides. The pressure plates (304) are made of elastic material and the hardness of the pressure plates (304) is greater than that of the flexible sealing gasket (305). After the oil-absorbing sponge (303) expands, it will squeeze the pressure plates (304), causing the end of the pressure plates (304) to tilt and squeeze towards the flexible sealing gasket (305).

3. The pipeline oil leakage monitoring device as described in claim 2, characterized in that, The oil-absorbing sponge (303) has an absorption cavity (306) in the middle to increase the contact area between the oil and the oil-absorbing sponge (303). The flexible sealing gasket (305) has an oil leakage port (307) in the middle that is connected to the absorption cavity (306) for adapting to the pipeline interface.

4. A pipeline oil leakage monitoring device as described in claim 2 or 3, characterized in that, The upper ring sleeve (1) is provided with upper extension plates (101) on both sides, and the lower ring sleeve (2) is provided with lower extension plates (201) on both sides. Each set of upper extension plates (101) and lower extension plates (201) is adapted to the shape of the corresponding sealing chamber (302), thereby increasing the contact area.

5. The pipeline oil leakage monitoring device as described in claim 4, characterized in that, The assembly chamber (301) is also equipped with an expansion component (4) to increase the pressure on the pressure plate (304).

6. The pipeline oil leakage monitoring device as described in claim 5, characterized in that, The expansion assembly (4) includes a heat-insulating shell (401) disposed inside the assembly chamber (301), a buffer chamber (402) disposed inside the heat-insulating shell (401), an inner cylinder (403) fixedly disposed on one side of the heat-insulating shell (401), the inner cylinder (403) extending into the buffer chamber (402), an exhaust port (405) communicating with the buffer chamber (402) being opened at the bottom of the inner cylinder (403), a pressure block (408) slidingly fitted inside the inner cylinder (403), the pressure block (408) and the bottom of the inner cylinder (403) being filled with sodium azide (407), an expansion tube (410) disposed inside the assembly chamber (301), and a conveying channel (409) disposed between the heat-insulating shell (401) and the expansion tube (410).

7. The pipeline oil leakage monitoring device as described in claim 6, characterized in that, The delivery channel (409) is configured with a skirt-shaped channel structure to increase the gas delivery volume.

8. The pipeline oil leakage monitoring device as described in claim 6, characterized in that, The buffer chamber (402) is surrounded by a buffer wall (406).

9. A pipeline oil leakage monitoring device as described in claim 1, characterized in that, The connecting assembly includes threaded rods (102) fixedly disposed on both sides of the upper ring sleeve (1), and connecting blocks (202) fixedly disposed on both sides of the lower ring sleeve (2). The connecting blocks (202) are provided with assembly holes (203) that cooperate with the threaded rods (102), and fastening nuts (6) are threadedly engaged on the threaded rods (102).

10. A pipeline oil leakage prevention monitoring device as described in claim 1, characterized in that, The oil-absorbing sponge (303) is detachably connected to the assembly chamber (301).

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