An anti-leakage system for sealing surfaces of oil- and gas-filled equipment

Abstract

The utility model discloses an oil filling and air charging equipment sealing surface anti -leakage system, including the connecting flange of electric power oil filling and air charging equipment connection, be provided with fluorine rubber layer between the sealing surface of connecting flange, the inside and outside of this fluorine rubber layer are provided with inner metal framework and outer metal framework, the inside of inner metal framework is connected with the vertical inner ring sealing washer, and the inner ring sealing washer is clamped in the sealing clamping groove that opens in the inside of connecting flan, the utility model provides an oil filling and air charging equipment sealing surface anti -leakage system, through setting up fluorine rubber layer between the sealing surface and cooperating the clamping structure of inner ring sealing washer and inner and outer metal framework, effectively blocks the leakage path and strengthens the sealing stability, has the advantages such as effectively preventing oil filling and air charging equipment sealing surface leakage, improving the sealing reliability and equipment operation safety.

Description

Technical Field

[0001] This utility model relates to the field of equipment sealing surfaces, specifically to a leak-proof system for the sealing surfaces of oil-filled and gas-filled equipment. Background Technology

[0002] In the field of power engineering, the sealing performance of the flange connection structure of oil-filled equipment such as main transformers and oil-immersed reactors, as well as gas-filled equipment (such as HGIS combined electrical appliances and SF6 circuit breakers), is directly related to the long-term safe operation and service life of the equipment.

[0003] In existing technologies, the processing technology of flange sealing surfaces has significant limitations. Microscopic unevenness on the surface makes it difficult to eliminate gaps, and these tiny channels easily become pathways for oil or gas leakage. Simultaneously, traditional gaskets generally use a single rubber material, which, under cyclic conditions across a wide temperature range of -20℃ to 200℃, is prone to irreversible changes in its molecular structure, accelerating the aging process and limiting its pressure-bearing capacity to below 8MPa. After long-term operation, the compression set of the gasket increases significantly, exceeding the 20% threshold, resulting in a severe decrease in elastic recovery and ultimately leading to seal failure. Furthermore, leakage monitoring mechanisms are severely lagging, relying mainly on manual periodic inspections or offline testing methods. These methods cannot effectively identify minute pressure fluctuations (below ±0.5kPa), causing leakage problems to often only be detected after they have developed into obvious leaks. This not only results in the continuous waste of insulating oil or SF6 gas but may also create safety hazards such as decreased equipment insulation performance or even equipment failure. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a leak-proof sealing surface system for oil-filled and gas-filled equipment.

[0005] This utility model is achieved through the following technical solution:

[0006] A leak-proof sealing system for oil-filled and gas-filled equipment includes a connecting flange for connecting the oil-filled and gas-filled equipment. A fluororubber layer is provided between the sealing surfaces of the connecting flange. An inner metal skeleton and an outer metal skeleton are provided inside and outside the fluororubber layer. A vertical inner ring sealing gasket is connected to the inner side of the inner metal skeleton. The inner ring sealing gasket is snapped into a sealing groove opened on the inner side of the connecting flange.

[0007] Furthermore, this application also proposes that the inner ring of the metal skeleton is connected to a C-shaped skeleton, and the C-shaped skeleton is snapped into a matching groove inside the inner ring sealing gasket.

[0008] Furthermore, this application also proposes that the inner ring sealing gasket and the inner contact surface of the sealing groove are provided with sealant, and the cross-section of the inner ring sealing gasket is trapezoidal with both sides gradually tapering towards the sealing groove.

[0009] Furthermore, this application also proposes that a pressure sensor is installed on the upper part of the connecting flange, the pressure sensor is electrically connected to the controller, and the controller is electrically connected to the light alarm.

[0010] Furthermore, this application also proposes that the sealing surface of the connecting flange be vaporized and peeled off using a fiber laser cleaning machine with pulsed laser.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: The oil-filled and gas-filled equipment sealing surface anti-leakage system provided in this application effectively blocks the leakage path and enhances the sealing stability by setting a fluororubber layer between the sealing surfaces and cooperating with the snap-fit ​​structure of the inner and outer metal skeleton and the inner ring sealing gasket. It has the advantages of effectively preventing leakage of the sealing surface of oil-filled and gas-filled equipment, improving sealing reliability and equipment operation safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system of this utility model;

[0013] Figure 2 This is an enlarged schematic diagram of a partial structure of this practical application;

[0014] In the diagram: 1. Connecting flange; 2. Sealing surface; 3. Fluororubber layer; 4. Outer metal skeleton; 5. Inner metal skeleton; 6. C-shaped skeleton; 7. Inner ring gasket; 8. Sealing groove; 9. Pressure sensor; 10. Controller; 11. Light alarm. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0016] like Figure 1-2 As shown in the embodiment of this application, a leak-proof sealing surface system for oil-filled and gas-filled equipment is proposed, including a connecting flange 1 for connecting the electric oil-filled and gas-filled equipment. A fluororubber layer 3 is provided between the sealing surfaces 2 of the connecting flange 1. An inner metal skeleton 5 and an outer metal skeleton 4 are provided inside and outside the fluororubber layer 3. A vertical inner ring sealing gasket 7 is connected to the inner side of the inner metal skeleton 5. The inner ring sealing gasket 7 is snapped into a sealing groove 8 opened on the inner side of the connecting flange 1.

[0017] The 3-4mm thick Q235 metal skeleton is composited through a vulcanization process. The fluororubber layer has a temperature resistance range of -20℃ to 200℃, and the metal skeleton enhances the overall pressure resistance to 16MPa. The fluororubber layer 3, with a thickness of 3-4mm, can be understood as an elastic material layer with temperature resistance and anti-aging properties. Its main function is to fill the microscopic gaps between the sealing surfaces to achieve a seal. The inner metal skeleton 5 and the outer metal skeleton 4 provide rigid support for the fluororubber layer 3, preventing excessive deformation under high pressure. The inner ring sealing gasket 7 is designed to enhance the sealing ability of the inner area, thus forming a double seal. The inner ring sealing gasket 7 can be made of metal.

[0018] The innovation of this application lies in the synergistic design of the fluororubber layer, the metal skeleton, and the vertically sealed inner ring gasket, which solves the problems of traditional single-material rubber gaskets, such as easy aging under temperature cycling and high pressure, insufficient pressure bearing capacity, and high compression set after long-term operation. In particular, by setting the metal skeleton inside and outside the fluororubber layer, the deformation trend of the sealing material is effectively constrained. At the same time, the cooperation between the inner ring gasket and the sealing groove forms multiple sealing barriers, thereby improving the reliability of the sealing system.

[0019] A vertical inner ring gasket is connected to the inner side of the inner metal skeleton. This design utilizes the metal skeleton as a fixing point to enhance the sealing capability of the inner area. For weak points where fluids are prone to leakage from the inside of the equipment, the inner ring gasket forms an additional barrier, thereby improving overall sealing performance. Furthermore, a sealing groove is provided on the inner side of the connecting flange, where the inner ring gasket is snapped into place. This mechanical snap-fit ​​method ensures precise positioning and secure fixation of the gasket, avoiding displacement problems caused by vibration or pressure fluctuations during operation, and further guaranteeing the long-term reliability of the sealing interface.

[0020] This application further proposes that the inner ring of the metal skeleton 5 is connected to a C-shaped skeleton 6, and the C-shaped skeleton 6 is snapped into a matching groove inside the inner ring sealing gasket 7.

[0021] In practical applications, the C-shaped frame 6 refers to a rigid support structure with a specific geometry, which can be made of high-strength materials such as stainless steel and aluminum alloy, with the aim of providing additional resistance to deformation. The matching slot refers to a groove structure that conforms to the outer contour of the C-shaped frame 6, which can be achieved through machining or injection molding, to ensure that the C-shaped frame 6 can be accurately positioned and securely embedded.

[0022] Specifically, in the aforementioned leak-proof sealing system for oil-filled and gas-filled equipment, a multi-layered sealing and reinforcement system is formed by adding a C-shaped skeleton 6 to the inner ring of the metal skeleton 5 and embedding it into the matching groove inside the inner ring sealing gasket 7. Based on the rigid support characteristics of the metal skeleton 5, the C-shaped skeleton 6 can be accurately distributed in the critical areas of the inner ring sealing gasket 7 that are prone to deformation, effectively avoiding the displacement problem caused by material creep during temperature cycling, which is common with traditional single sealing gaskets. Simultaneously, the geometric fit between the C-shaped skeleton 6 and the matching groove evenly distributes external pressure to the entire inner ring sealing gasket 7, preventing permanent compression deformation caused by localized stress concentration, thereby maintaining the microscopic fit of the sealing surface during long-term operation and effectively inhibiting the formation of leakage channels.

[0023] This application further proposes that the inner ring sealing gasket 7 and the sealing groove 8 have a sealing adhesive on their internal contact surfaces, and the inner ring sealing gasket 7 has a trapezoidal cross-section with its two sides gradually tapering towards the sealing groove 8.

[0024] Specifically, the sealant refers to a viscous and elastic material, such as silicone sealant, polyurethane sealant, or epoxy resin sealant, etc. Its purpose is to fill any microscopic gaps that may exist between the inner ring sealing gasket 7 and the sealing groove 8, thereby forming a continuous sealing barrier. The trapezoidal cross-section design of the inner ring sealing gasket 7 refers to its geometric shape where both sides gradually taper inwards. This structure can be achieved through molding or machining, and its purpose is to optimize the stress distribution, allowing the sealing gasket to fit more tightly against the inner wall of the sealing groove 8 during compression.

[0025] This application further proposes that a pressure sensor 9 is installed on the upper part of the connecting flange 1, the pressure sensor 9 is electrically connected to the controller 10, and the controller 10 is electrically connected to the light alarm 11.

[0026] Among them, pressure sensor 9 refers to a sensing device capable of detecting pressure changes in the sealed area in real time. It can be implemented using various pressure detection principles such as piezoresistive, capacitive, or resonant types, aiming to accurately capture minute pressure fluctuations and avoid signal weakening or omission caused by positional deviations in traditional monitoring methods. Controller 10 can be understood as a control unit with data acquisition and analysis functions. It can be implemented using a microcontroller, PLC, or embedded system, aiming to continuously analyze pressure data and identify anomalies, significantly improving the timeliness and accuracy of leak detection. Light alarm 11 refers to an alarm device capable of emitting visual warning signals. It can be implemented using LED light groups, audible and visual alarms, etc., aiming to eliminate human response delays through an automatic alarm mechanism, enabling maintenance personnel to quickly intervene and handle leaks in their early stages.

[0027] Specifically, this solution utilizes a pressure sensor 9 positioned on the upper part of the connecting flange 1 to directly sense pressure changes in the sealing area, ensuring that even minute pressure fluctuations are reliably captured. The pressure sensor 9 transmits the collected pressure data to the controller 10 in real time. The controller 10 continuously analyzes the received data stream and determines whether an anomaly exists based on a preset threshold. When the pressure fluctuation exceeds ±0.5 kPa and lasts for more than 2 minutes, the controller 10 triggers an audible and visual alarm (loudness ≥85 dB) to alert personnel of the leakage risk and initiates a tightening of the seal. This achieves a complete process from pressure monitoring to anomaly alarm. This mechanism, based on real-time monitoring and automatic alarm, effectively overcomes the lag of traditional manual inspections or offline testing methods, significantly improving the efficiency and reliability of sealing surface condition monitoring. Furthermore, this solution, combined with the fluororubber layer 3 and the metal skeleton structure, further enhances the overall performance of the sealing system, ensuring the safety and stability of equipment operation.

[0028] This application further proposes that the sealing surface 2 of the connecting flange 1 be vaporized and peeled off using a fiber laser cleaning machine through pulsed laser.

[0029] Specifically, the fiber laser cleaning machine uses a 1080nm wavelength fiber laser, employing pulsed laser (energy density 10... 6 ~10 8 W / cm 2 This process achieves vaporization and peeling of the rust layer on the sealing surface. The laser scanning path is spiral-progressive (speed 500-800mm / s), with a spot diameter of 3mm±0.1mm. The power is set to 200W for carbon steel sealing surfaces and 300W for stainless steel sealing surfaces to ensure that the surface is free of oxide layer and residual particles after treatment.

[0030] A high-precision beam control system ensures uniform laser scanning of the entire sealing surface 2, effectively removing rust layers from microscopic gaps. Considering that the processing precision of the sealing surface 2 directly affects sealing performance, this solution is particularly suitable for the connecting flange 1 of electrically powered oil-filled and gas-filled equipment, significantly improving the flatness of the sealing surface 2. Furthermore, the combined use of pressure sensor 9 and controller 10 allows for real-time monitoring and verification of the processing effect on the sealing surface 2, thereby inhibiting the formation of leakage channels at the source.

[0031] In summary, the above technical solutions not only solve the problem of insufficient processing precision of sealing surface 2, but also effectively reduce the occurrence of micro-leakage and improve the safety and reliability of equipment operation.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing surface system for oil-filled and gas-filled equipment, comprising a connecting flange (1) for connecting the electric oil-filled and gas-filled equipment, characterized in that: A fluororubber layer (3) is provided between the sealing surfaces (2) of the connecting flange (1). An inner metal skeleton (5) and an outer metal skeleton (4) are provided inside and outside the fluororubber layer (3). A vertical inner ring sealing gasket (7) is connected to the inner side of the inner metal skeleton (5). The inner ring sealing gasket (7) is snapped into the sealing groove (8) opened on the inner side of the connecting flange (1).

2. The leak-proof sealing surface system for oil-filled and gas-filled equipment according to claim 1, characterized in that: The inner ring of the metal skeleton (5) is connected to a C-shaped skeleton (6), and the C-shaped skeleton (6) is snapped into a matching slot inside the inner ring sealing gasket (7).

3. The leak-proof sealing surface system for oil-filled and gas-filled equipment according to claim 1, characterized in that: The inner ring sealing gasket (7) and the inner contact surface of the sealing groove (8) are provided with sealant. The inner ring sealing gasket (7) has a trapezoidal cross section and its two sides gradually narrow towards the sealing groove (8).

4. The leak-proof sealing surface system for oil-filled and gas-filled equipment according to claim 1, characterized in that: A pressure sensor (9) is installed on the upper part of the connecting flange (1). The pressure sensor (9) is electrically connected to the controller (10), and the controller (10) is electrically connected to the light alarm (11).

5. The leak-proof sealing surface system for oil-filled and gas-filled equipment according to claim 4, characterized in that: The sealing surface (2) of the connecting flange (1) is vaporized and peeled off using a fiber laser cleaning machine through pulsed laser.

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