Pipeline flange joint leakage detection device

Abstract

The application relates to a pipeline flange joint leakage detection device and relates to the technical field of blast furnace ironmaking equipment. The device comprises a flange outer connecting piece sleeved at the joint of two flanges, a closed chamber is formed in the flange outer connecting piece, the closed chamber is connected with the connecting gap between the two flanges, a gas guide pipe is arranged on the side wall of the flange outer connecting piece, the gas guide pipe is connected with the closed chamber, and a detection module is connected with the other end of the gas guide pipe. The application has the effects of efficiently monitoring the pipeline flange joint and improving safety.

Description

Technical Field

[0001] This application relates to the field of blast furnace ironmaking equipment technology, and in particular to a leak detection device for pipe flange connections. Background Technology

[0002] In the extremely complex and continuous production process of blast furnace ironmaking, the piping system plays an irreplaceable "cardiovascular system" role. Its stable and efficient operation is the cornerstone for achieving high output, high quality, low consumption, and long service life of the blast furnace. Therefore, the sealing, heat resistance, and structural integrity of the piping system are crucial. In the industrial field of blast furnace smelting, pipe flange connections are potential leakage risk points, especially in high-temperature and high-pressure pipelines within the blast furnace body. Even a minor leak can lead to huge safety accidents, property damage, and environmental pollution. Even a small air leak can cause losses in air pressure, air volume, and air temperature, potentially resulting in reduced blast furnace output, decreased pig iron quality, or even blast furnace shutdown.

[0003] In the vast and complex piping system of a blast furnace, flanges are key components connecting various pipes, valves, and equipment, and are crucial for ensuring the system's airtightness. However, during blast furnace smelting, the traditional method of relying on personnel to personally visit the site and check for flange leaks by sound or touch, while direct, has the following significant drawbacks and risks: 1) Extremely high personal safety risks: Pipelines in the blast furnace area transport high-temperature, high-pressure gases. If a flange suddenly experiences a serious leak, the high-speed jet of hot gas could directly cause severe burns, injuries, and other safety accidents to nearby personnel. Furthermore, the complex environment in this area presents other safety hazards; 2) Low detection efficiency and poor reliability: The plant area... The noise level is extremely high, and subtle leaks are difficult to detect. For minor internal leaks or when external winds are strong, they are almost undetectable by touch. This method relies heavily on personal experience, cannot quantify the amount of leakage, and is prone to missed detection, making it difficult to meet the needs of modern blast furnaces for refined safety and economic management; 3) Insufficient prevention and real-time capability: This method is a passive and delayed inspection method, which cannot achieve 24-hour uninterrupted monitoring. Personnel cannot know about sudden leaks during inspection intervals, lacking early warning capabilities. The situation may worsen due to untimely detection, resulting in greater energy waste or production accidents; Based on the above factors, this application provides a leak detection device for pipe flange connections to improve the above problems. Utility Model Content

[0004] To efficiently monitor pipe flange connections and improve safety, this application provides a pipe flange connection leakage detection device.

[0005] The air leakage detection device for pipe flange connections provided in this application adopts the following technical solution: A leak detection device for a pipe flange connection includes a flange external fitting fitted at the connection of two flanges. The flange external fitting has a sealed chamber inside, which is connected to the connection gap between the two flanges. An air vent pipe is provided on the side wall of the flange external fitting, which is connected to the sealed chamber. The other end of the air vent pipe is connected to a detection module.

[0006] By adopting the above technical solution, flammable, toxic, or harmful media leaking from the flange connection can easily cause a fire or even an explosion upon contact with an open flame. This application designs and installs a leak detection system at the flange connection, which can issue an alarm in the early stages of gas leakage, allowing valuable time for personnel to carry out emergency repairs, fundamentally avoiding catastrophic accidents, and ensuring the safety of personnel and factory facilities. Preferably, the detection module uses a VOC detection alarm.

[0007] By adopting the above technical solution, the VOC detection alarm can accurately detect gas leaks and issue an alarm, allowing sufficient time for staff to carry out emergency repairs.

[0008] Preferably, the flange external fitting includes two interlocking semicircular rings, which are then fitted onto the outer wall of the connection between the two flanges.

[0009] By adopting the above technical solution, the flange external parts can be assembled in a detachable connection form, which facilitates the maintenance of the flange external parts or flange.

[0010] Preferably, each of the two ends of the semicircular ring is provided with a connecting piece, and the connecting piece is provided with a connecting hole. The flange external component also includes a connector for fixing the two semicircular rings. The connector passes through the connecting holes of the two connecting pieces in sequence and fixes the two semicircular rings.

[0011] By adopting the above technical solution, it is possible to quickly install or disassemble flange external components, which is highly convenient.

[0012] Preferably, the connector includes a bolt, a nut, and a washer.

[0013] By adopting the above technical solution, the connector has a simple structure, is easy to implement, and has high practicality.

[0014] Preferably, the height of the sealed chamber is greater than the gap at the connection of the two flanges.

[0015] By adopting the above technical solutions, the probability of gas leakage from the sealed chamber can be effectively reduced, and the sealing performance can be improved.

[0016] Preferably, the end of the air intake pipe near the flange external connector is narrowed, and the narrowed end of the air intake pipe is inserted into the flange external connector.

[0017] By adopting the above technical solution, the sealing performance between the air vent pipe and the flange external connection is effectively improved.

[0018] Preferably, the inner wall of the sealed cavity is coated with an anti-corrosion layer.

[0019] By adopting the above technical solution, it is possible to prevent leaked gas from corroding the flange external parts, thereby affecting the sealing performance of the flange external parts and causing the detection to lose accuracy.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. If flammable, toxic or harmful media leak from the flange connection, they can easily cause a fire or even an explosion when exposed to an open flame. This application designs and installs a leak detection system at the flange connection, which can issue an alarm in the early stage of gas leakage, leaving valuable time for staff to carry out emergency repairs, fundamentally avoiding catastrophic accidents and ensuring the safety of personnel and factory facilities. 2. This application can achieve early warning and continuous monitoring, turning passive into active. Traditional manual inspection methods have limitations such as long intervals, susceptibility to subjective factors, and inability to detect sudden leaks. In contrast, the device of this application can monitor key points 24 hours a day, enabling maintenance personnel to intervene in a timely manner in the early stage of leakage and prevent problems before they occur. 3. This application can improve the efficiency of detecting leaks by using a mechatronics device to detect leaks in real time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a pipe flange connection leakage detection device according to an embodiment of this application.

[0022] Figure 2 This is a cross-sectional view of the air leakage detection device according to an embodiment of this application.

[0023] Figure 3 This is a structural schematic diagram of the flange external connector according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Flange; 2. External flange fitting; 21. Semicircular ring; 211. Connecting piece; 212. Connecting hole; 22. Connecting piece; 3. Air vent pipe; 4. Detection module; 5. Sealed chamber. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0026] This application discloses a leak detection device for pipe flange connections. (Refer to...) Figure 1 , Figure 2 and Figure 3 The flange external connector 2 is fitted onto the outer wall of the connection between the two flanges 1. In this embodiment, the flange external connector 2 includes two interlocking semicircular rings 21. The end walls of the two semicircular rings 21 are integrally formed with connecting pieces 211. The connecting pieces 211 have connecting holes 212 through them along the thickness direction. The flange external connector 2 also includes a connector 22. In this embodiment, the connector 22 includes bolts, nuts and washers. The bolts pass through the two connecting pieces 211 in sequence and the nuts fix the two semicircular rings 21, thereby detachably fitting the flange external connector 2 onto the outside of the connection between the two flanges 1.

[0027] Reference Figure 1 , Figure 2 and Figure 3 Both semicircular rings 21 have sealed chambers 5 inside. In this embodiment, the thickness of the sealed chamber 5 is greater than the gap at the connection of the two flanges 1 to ensure that gas leakage can stably enter the sealed chamber 5. The inner wall of the sealed chamber 5 is coated with an anti-corrosion layer to prevent the leaked gas from corroding the flange external parts 2, thereby affecting the sealing performance of the flange external parts 2 and causing the detection to lose accuracy.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the flange external connector 2 is connected to a gas inlet pipe 3. The end of the gas inlet pipe 3 near the flange external connector 2 is narrowed. The narrowed end of the gas inlet pipe 3 is inserted into the flange external connector 2 and fixed by welding. The gas inlet pipe 3 is connected to the sealed chamber 5 of the flange external connector 2. When gas leaks, gas will enter the gas inlet pipe 3 through the sealed chamber 5. The other end of the gas inlet pipe 3 is connected to a detection module 4. In this embodiment, the detection module 4 is a VOC detection alarm. The VOC detection alarm detects the gas leak and notifies the staff to carry out emergency repairs in time.

[0029] The implementation principle of the gas leakage detection device at the flange connection of the pipeline in this application embodiment is as follows: When gas in the pipeline leaks through the connection gap between the two flanges 1, the leaking gas will enter the sealed chamber 5, then enter the gas inlet pipe 3 and the detection module 4. The detection module 4 detects the gas leak and issues an alarm to notify the staff that a gas leak has occurred, thus allowing the staff more time for emergency repairs. By designing and installing a gas leakage detection system at the flange 1 connection, this application can issue an alarm in the early stage of gas leakage, allowing valuable time for the staff to carry out emergency repairs, fundamentally avoiding catastrophic accidents and ensuring the safety of personnel and factory facilities. In addition, this application can achieve early warning and continuous monitoring, turning passive into active. Traditional manual inspection methods have limitations such as long intervals, susceptibility to subjective factors, and inability to detect sudden leaks. The device of this application can monitor key points 24 hours a day, enabling maintenance personnel to intervene in time in the early stage of leakage and prevent problems before they occur. This application can improve the efficiency of detecting gas leaks by using a mechatronics device for real-time detection.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting air leakage at pipe flange connections, characterized in that: The device includes an external flange fitting fitted at the connection of two flanges. The external flange fitting has a sealed chamber inside, which is connected to the connection gap between the two flanges. An air vent pipe is provided on the side wall of the external flange fitting, which is connected to the sealed chamber. The other end of the air vent pipe is connected to a detection module.

2. The air leakage detection device for pipe flange connections according to claim 1, characterized in that: The detection module uses a VOC detection alarm.

3. The air leakage detection device for pipe flange connections according to claim 1, characterized in that: The flange external fitting includes two interlocking semicircular rings, which are then fitted onto the outer wall of the connection between the two flanges.

4. The air leakage detection device for pipe flange connections according to claim 3, characterized in that: Both ends of the semicircular ring are provided with connecting pieces, and the connecting pieces are provided with connecting holes. The flange external component also includes a connector for fixing the two semicircular rings. The connector passes through the connecting holes of the two connecting pieces in sequence and fixes the two semicircular rings.

5. The air leakage detection device for a pipe flange connection according to claim 4, characterized in that: The connectors include bolts, nuts, and washers.

6. The air leakage detection device for pipe flange connections according to claim 1, characterized in that: The height of the sealed chamber is greater than the gap at the connection of the two flanges.

7. The air leakage detection device for pipe flange connections according to claim 1, characterized in that: The end of the air intake pipe near the flange external connector is narrowed, and the narrowed end of the air intake pipe is inserted into the flange external connector.

8. The air leakage detection device for pipe flange connections according to claim 1, characterized in that: The inner wall of the sealed cavity is coated with an anti-corrosion layer.

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