Petroleum pipeline leakage detection device

Abstract

The invention relates to the technical field of pipeline leakage detection devices, in particular to a petroleum pipeline leakage detection device, and a liquid corrosion prevention mechanism is arranged in the area, corresponding to flanges, of a mounting cover. Leaked liquid is guided to converge directionally through the collecting cover, the liquid level sensor monitors concentrated accumulated liquid in the collecting cover in real time, meanwhile, the leaked liquid is guided to the outside of the device through a directional flow guide structure of the collecting cover, the connecting pipe and the storage bottle, the liquid is thoroughly prevented from making contact with internal assemblies and detection elements, corrosion and erosion are reduced, and the safety of the device is improved. The technical problems that components are corroded, the detection precision is reduced and the maintenance cost is increased due to liquid turbulence accumulation of an existing device are solved.

Description

Technical Field

[0001] This invention relates to the field of pipeline leak detection device technology, specifically to an oil pipeline leak detection device. Background Technology

[0002] Oil pipeline leak detection devices are used to monitor the status of oil pipelines in real time and detect leaks in a timely manner, thereby avoiding environmental pollution and safety accidents. Whether the leak is caused by pipeline rupture, corrosion, or other reasons, these devices can respond in the shortest possible time, trigger the alarm system, and help operators quickly locate the leak point. Timely detection of leaks can effectively reduce the waste of oil resources and prevent the accident from escalating.

[0003] Chinese Patent Publication No. CN221098352U discloses an oilfield pipeline leak detection device, including a first protective cover. This device uses a sliding slider to move a limiting block towards a first telescopic spring, causing the spring to contract. As the limiting block moves, a connecting block returns to the inner cavity of the mounting block, aligning the first and second protective covers. An insert block is then inserted into a slot in the fixing block. The insert block continuously presses against the connecting plate, causing the second telescopic spring to contract. At this point, the sliding of the slider is stopped, and the first telescopic spring ejects the limiting block. The limiting block then moves the connecting block into the fixing slot, limiting the insertion block and completing the installation of the first and second protective covers. The second telescopic spring also continuously presses against the insert block, strengthening the fixing effect and allowing for quick disassembly and accident handling by personnel.

[0004] The aforementioned patent proposes that the leak detection device relies solely on a single gas sensor to detect leaks. In oil leaks, gases evaporate first, followed by liquid seepage. While gas sensing can provide early warning, it has significant drawbacks: First, there is no directional collection structure after liquid leakage, causing the leaked liquid to flow erratically and accumulate randomly within the protective cover. This makes it impossible to accurately count the amount of liquid accumulated, resulting in difficulty in quantifying the degree of liquid leakage. Second, the turbulent liquid medium directly contacts the internal components of the device and covers the detection elements, which not only corrodes the components and shortens the device's lifespan but also interferes with the sensing signal, reduces detection accuracy, and ultimately increases maintenance costs and frequency. Therefore, we propose an oil pipeline leak detection device. Summary of the Invention

[0005] To address the aforementioned issues, an oil pipeline leak detection device is provided. By installing a collection hood inside the mounting enclosure, leaking liquid flows directionally into the collection hood, preventing disorderly turbulence. Combined with a liquid level sensor, the device monitors the amount of liquid accumulated in the collection hood in real time, accurately reflecting the severity of the leak and solving the problem of existing devices being unable to quantify the extent of the leak due to liquid turbulence. Simultaneously, the directional flow-guiding structure of the collection hood, connecting pipe, and collection bottle quickly guides the leaking liquid to the collection bottle outside the device, completely preventing direct contact between the liquid medium and the internal components and detection elements, reducing the erosion of components by corrosive media, and solving the technical problems of component corrosion, decreased detection accuracy, and increased maintenance costs caused by liquid turbulence accumulation in existing devices.

[0006] To address the problems of existing technologies, this invention provides an oil pipeline leak detection device, comprising two mounting covers, within which a pipeline body is housed. Flanges are fixedly mounted on the pipeline body. Gas sensors are mounted on the mounting covers, and anti-liquid corrosion mechanisms are provided in the areas between the flanges on the mounting covers. The anti-liquid corrosion mechanism includes: a liquid level sensor fixedly connected to the mounting covers for real-time monitoring of the amount of liquid accumulated due to oil leakage; and a collection component connected to the mounting covers for collecting the leaked liquid medium.

[0007] For example, the level sensor is a level sensor with a corrosion-resistant coating.

[0008] For example, the storage assembly includes a collection cover and a sealing gasket; the collection cover is fixedly connected to the inside of the mounting cover; and the sealing gasket is fixedly connected to the side of the collection cover away from the gas sensor.

[0009] For example, the collection assembly also includes a flow guiding component, which is connected through to the bottom of the collection hood to guide and drain the liquid medium generated by the oil spill.

[0010] For example, the flow guiding assembly includes a connecting pipe, a solenoid valve, and a collection bottle; the connecting pipe passes through the mounting cover and is fixedly connected to the collection cover, and the connecting pipe and the collection cover are in communication; the liquid inlet of the solenoid valve is fixedly connected to the end of the connecting pipe away from the collection cover; the collection bottle is threadedly connected to the liquid outlet of the solenoid valve.

[0011] For example, the liquid level sensor is connected to the controller, and the controller has a preset liquid level threshold. When the liquid level sensor detects that the liquid level has reached the threshold, the controller controls the solenoid valve to open.

[0012] The advantages of this invention compared to the prior art are:

[0013] 1. By guiding the leaked liquid to converge in a directional manner through a collection hood, the core defect of liquid turbulence in existing devices is solved; the liquid level sensor monitors the concentrated liquid accumulation in the collection hood in real time, which can accurately reflect the severity of the liquid leak, solving the problem that existing devices cannot quantify the degree of leakage due to liquid turbulence; at the same time, through the directional flow guiding structure of the collection hood, connecting pipe and storage bottle, the leaked liquid is directed to the outside of the device, completely avoiding contact between the liquid and internal components and detection elements, reducing corrosion and erosion, and solving the technical problems of component corrosion, decreased detection accuracy and increased maintenance costs caused by liquid turbulence accumulation in existing devices.

[0014] 2. When the liquid accumulation reaches the preset trigger threshold, the liquid level sensor transmits a signal to the solenoid valve, which automatically opens to guide the liquid medium into the collection bottle. This fundamentally avoids the risk of component corrosion caused by excessive liquid accumulation and solves the technical problem of the lack of an automatic liquid discharge mechanism in the leak detection device, which leads to excessive liquid accumulation and continuous corrosion of the device components, resulting in component damage, shortened device lifespan, and the need for frequent manual cleaning of the liquid accumulation, increasing maintenance workload. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the mounting cover and gas sensor of an oil pipeline leak detection device according to the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram of the gas sensor and liquid level sensor of an oil pipeline leak detection device according to the present invention application.

[0017] Figure 3 This is a three-dimensional schematic diagram of the solenoid valve and the storage bottle of an oil pipeline leak detection device according to this invention application.

[0018] Figure 4 This is a three-dimensional schematic diagram of the collection cover and storage bottle of an oil pipeline leak detection device according to the present invention application.

[0019] Figure 5 This is a three-dimensional schematic diagram of the liquid level sensor and collection hood of an oil pipeline leak detection device according to this invention application.

[0020] Figure 6 yes Figure 4 Enlarged diagram of point B in the middle.

[0021] Figure 7 This is a three-dimensional schematic diagram of the liquid level sensor and the storage bottle of an oil pipeline leak detection device according to this invention application.

[0022] The following are the labels in the diagram: 1. Pipe body; 11. Mounting cover; 12. Gas sensor; 2. Liquid level sensor; 21. Collection cover; 22. Sealing gasket; 23. Connecting pipe; 24. Solenoid valve; 25. Storage bottle. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0024] See Figures 1-4 As shown, an oil pipeline leak detection device includes two mounting covers 11, within which a pipeline body 1 is disposed. A flange is fixedly mounted on the pipeline body 1. A gas sensor 12 is mounted on the mounting cover 11. An anti-liquid corrosion mechanism is provided in the area between the flanges on the mounting cover 11. The anti-liquid corrosion mechanism includes: a liquid level sensor 2 fixedly connected to the mounting cover 11 for real-time monitoring of the amount of liquid accumulated due to oil leakage; and a collection component connected to the mounting cover 11 for collecting the liquid medium leaked from the oil. The liquid level sensor 2 is a liquid level sensor with a corrosion-resistant coating.

[0025] Specifically, the casing and circuitry of this oil pipeline leak detection device are designed and manufactured according to explosion-proof standards. The casing adopts an explosion-proof sealed structure, which can effectively prevent external flammable and explosive media from entering the equipment, avoiding safety accidents caused by electrical sparks generated during circuit operation, and ensuring the safety of the oil pipeline operating environment. The circuitry uses explosion-proof components and wiring methods, and has overcurrent, overvoltage, and short-circuit protection functions. It can prevent equipment damage caused by circuit faults and avoid the risk of explosion caused by fault currents, making it suitable for the use of high-risk operating scenarios such as oil pipelines. The liquid level sensor 2 is preferably a corrosion-resistant liquid level sensor. After the leaked liquid is collected by the collection hood 21, it is monitored in real time by the liquid level sensor 2, and automatically discharged through the flow guiding component when the threshold is reached.

[0026] When the oil pipeline leak detection device is put into use, two mounting covers 11 are fixedly assembled to the outside of the flange, and the housing assembly is deployed on the lower side of the mounting covers 11. When a leak occurs in the oil pipeline, the gas sensor 12 detects the concentration of the leaking gas in real time, and the liquid level sensor 2 simultaneously monitors the amount of liquid accumulated due to the leak, accurately reflecting the severity of the liquid leak. This overcomes the deficiency of a single gas sensor, which can only provide leak warnings but cannot quantify the leak magnitude, providing reliable data support for leak handling. The surface of the liquid level sensor 2 is coated with a rubber coating, which improves the wear resistance and corrosion resistance of the liquid level sensor.

[0027] The inner wall of the collection hood is coated with polytetrafluoroethylene (PTFE). This coating serves two purposes: firstly, it guides leaked liquid to quickly converge at the bottom, preventing it from flowing erratically and overflowing within the hood; secondly, it reduces liquid residue on the wall surface, ensuring all accumulated liquid flows into the guide assembly. This structure, combined with the sealing gasket, achieves directional collection of leaked liquid. This prevents liquid from covering the detection elements and interfering with the sensor signal, ensuring the stability of detection accuracy. Furthermore, the guide assembly quickly directs the liquid to the outside of the device, preventing direct contact between the liquid medium and internal components, reducing the corrosive effects of corrosive media, lowering the probability of component damage, extending the device's lifespan, and reducing maintenance frequency and overall maintenance costs.

[0028] See Figures 1-4 and Figure 7 As shown, the collection assembly includes a collection cover 21 and a sealing gasket 22; the collection cover 21 is fixedly connected to the inner side of the mounting cover 11; the sealing gasket 22 is fixedly connected to the side of the collection cover 21 away from the gas sensor 12; the collection assembly also includes a flow guiding assembly, which is connected through to the bottom of the collection cover 21 for guiding and diverting the liquid medium generated by the oil spill; the flow guiding assembly includes a connecting pipe 23, a solenoid valve 24, and a collection bottle 25; the connecting pipe 23 passes through the mounting cover 11 and is fixedly connected to the collection cover 21, and the connecting pipe 23 is in communication with the collection cover 21; the inlet of the solenoid valve 24 is fixedly connected to the end of the connecting pipe 23 away from the collection cover 21; the collection bottle 25 is threadedly connected to the outlet of the solenoid valve 24; the liquid level sensor 2 is signal-connected to the controller, and the controller has a preset liquid level threshold; when the liquid level sensor 2 detects that the liquid level has reached the threshold, the controller controls the solenoid valve 24 to open.

[0029] Specifically, the sealing gasket 22 is preferably made of fluororubber to improve its oil corrosion resistance. The solenoid valve 24 is preferably an electric drain valve. The storage bottle 25 is preferably made of transparent glass. The collection cover 21 is coated with polytetrafluoroethylene. The liquid level sensor 2 monitors the liquid level by detecting changes in the liquid level height inside the collection cover 21. The liquid level sensor 2 can measure the liquid level height using the hydrostatic pressure of the liquid. The pressure exerted by the liquid on the probe of the liquid level sensor 2 is proportional to the liquid height. The liquid level height can be calculated by measuring this pressure. The calibration method is as follows: inject different volumes of standard petroleum medium into the collection cover 21, record the corresponding output signals of the liquid level sensor 2, and establish the correspondence between the liquid level and the signal. The preset trigger threshold is set by the control system. When the liquid level signal detected by the liquid level sensor 2 reaches the threshold, the control system outputs an electrical signal to the solenoid valve 24, driving the solenoid valve 24 to open and drain the liquid. The solenoid valve 24 is an electric drain valve. The solenoid valve 24, the liquid level sensor 2, and the control system form a closed-loop control. The driving power of the solenoid valve 24 is provided by the pipeline auxiliary power supply system. The anti-liquid corrosion mechanism consists of a collection hood 21, a liquid level sensor 2, a flow guiding assembly, and a control unit. It is an integrated structure used to prevent leaked liquid from corroding the internal components.

[0030] The collection cover 21 and the mounting cover 11 are fixed together by welding. The probe of the liquid level sensor 2 is placed inside the collection cover 21. The display end of the liquid level sensor 2 is fixedly installed together with the mounting cover 11. When the two mounting covers 11 are fixedly assembled on the outside of the flange, the sealing gaskets 22 equipped on the two mounting covers 11 are squeezed against each other to form a sealing structure, ensuring that there is no gap between the two collection covers 21. Moreover, the collection cover 21 is deployed on the lower side of the mounting cover 11, so that when the petroleum liquid medium leaks from the flange, it can fall accurately into the collection cover 21.

[0031] The sealing gasket 22 is preferably made of fluororubber, which has excellent resistance to corrosion from petroleum media. This prevents the sealing structure from failing due to media erosion, ensuring the sealing reliability of the collection hood 21 and preventing leaked liquid from seeping into the device or the surrounding environment. After the petroleum liquid falls into the collection hood 21, the probe of the liquid level sensor 2 simultaneously monitors the amount of liquid accumulated. When the amount of liquid reaches a preset trigger threshold, the liquid level sensor 2 transmits a signal to the solenoid valve 24, which automatically opens to guide the liquid medium into the collection bottle 25, fundamentally avoiding the risk of component corrosion caused by excessive accumulation of liquid.

[0032] The collection bottle 25 is preferably made of transparent glass, allowing staff to directly observe the accumulated amount of leaked liquid, providing a clear basis for assessing the extent of the leak and developing a response plan. The inner wall of the collection hood 21 is coated with a polytetrafluoroethylene (PTFE) coating. The PTFE coating has extremely low adhesion, effectively reducing residual liquid adhesion to the wall surface. Combined with the automatic drainage function of the self-draining valve, it shortens liquid retention time, achieving rapid and thorough drainage and reducing the risk of secondary corrosion caused by residual liquid. Furthermore, the collection bottle 25 and the outlet of the solenoid valve 24 are connected by a threaded connection, allowing staff to directly rotate and disassemble the collection bottle 25 without the need for additional tools. This convenient replacement simplifies the leak recovery and treatment process, improving emergency response efficiency.

[0033] Working principle: When the oil pipeline leak detection device is put into use, the two mounting covers 11 are first assembled on the outside of the flange and the two mounting covers 11 are firmly fixed to the outside of the pipeline body 1. When the oil pipeline leaks, the gas sensor 12 detects the concentration of leaked gas in real time. After the oil liquid medium falls into the collection cover 21, the probe of the liquid level sensor 2 monitors the amount of liquid accumulation simultaneously. When the amount of liquid accumulation reaches the preset trigger threshold, the solenoid valve 24 automatically opens and introduces the liquid medium into the collection bottle 25, which fundamentally avoids the risk of component corrosion caused by excessive accumulation of liquid. Moreover, the staff can intuitively observe the accumulated amount of leaked liquid and can directly rotate and disassemble the collection bottle 25 to achieve convenient replacement, simplify the recovery and treatment process of leaked liquid, and improve the efficiency of emergency response.

[0034] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A leak detection device for oil pipelines, comprising two mounting covers (11), a pipeline body (1) is disposed inside the two mounting covers (11), a flange is fixedly mounted on the pipeline body (1), and a gas sensor (12) is mounted on the mounting cover (11), characterized in that, The mounting cover (11) is provided with a liquid corrosion protection mechanism in the area corresponding to the flange; The anti-liquid corrosion mechanism includes: A liquid level sensor (2) is fixedly connected to the mounting cover (11) for real-time monitoring of the amount of liquid accumulated by oil spills; A collection assembly attached to the mounting cover (11) is used to collect liquid media leaked from oil.

2. A petroleum pipeline leak detection apparatus according to claim 1, wherein The liquid level sensor (2) is a corrosion-resistant liquid level sensor.

3. The oil pipeline leak detection device according to claim 2, characterized in that, The storage components include a collection cover (21) and a sealing gasket (22); The collection hood (21) is fixedly connected to the inner side of the mounting hood (11) for collecting leaked liquid; The sealing gasket (22) is fixedly connected to the side of the collection cover (21) away from the gas sensor (12).

4. A petroleum pipeline leak detection apparatus according to claim 3, wherein The storage assembly also includes a flow guide assembly that is connected through to the bottom of the collection hood (21) for discharging liquid to the outside of the mounting hood (11).

5. A petroleum pipeline leak detection apparatus according to claim 4, wherein The flow guiding assembly includes a connecting pipe (23), a solenoid valve (24), and a storage bottle (25); The connecting pipe (23) passes through the mounting cover (11) and is fixedly connected to the collection cover (21), and the connecting pipe (23) and the collection cover (21) are in communication; The inlet of the solenoid valve (24) is fixedly connected to the end of the connecting pipe (23) away from the collection hood (21); The storage bottle (25) is threadedly connected to the outlet of the solenoid valve (24).

6. The apparatus of claim 1, wherein, The liquid level sensor (2) is connected to the controller. The controller is integrated into the liquid level sensor in the gas sensor (12). The controller has a preset liquid level threshold. When the liquid level sensor (2) detects that the liquid level has reached the threshold, the controller controls the solenoid valve (24) to open.

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