Online oil chromatographic analysis device and insulating oil analysis method based on online oil chromatographic analysis device

Abstract

The invention relates to an on-line oil chromatographic analysis device and an insulating oil analysis method based on the on-line oil chromatographic analysis device, relates to the technical field of power equipment monitoring, and can improve the analysis efficiency of oil chromatographic analysis. The device comprises: a device integrated housing; the plurality of functional modules are arranged in the device integrated shell; the plurality of functional modules comprise an oil extractor module, a degassing cavity module, a carrier gas module, a chromatographic column module and a detection unit module; wherein the device integrated shell comprises a first outer surface, a second outer surface and a third outer surface which are provided with different function partitions; at least parts of the oil extractor module, the degassing cavity module and the detection unit module related to oil gas treatment are located in a shell internal area corresponding to the first outer surface; the second outer surface is provided with a plurality of interfaces used for being connected with external equipment; the third outer surface is provided with an electrical control module used for controlling the device to operate.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment monitoring, and in particular to an online oil chromatography analysis device and an insulating oil analysis method based on the online oil chromatography analysis device. Background Art

[0002] In power systems, traditional oil chromatography analysis devices are bulky, unable to provide real-time monitoring on-site, and therefore lack timeliness. To address this, some portable devices have been developed, but they generally suffer from low integration, resulting in bulky and inconvenient portability, leading to low analysis efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide an online oil chromatography analysis device and an insulating oil analysis method based on the online oil chromatography analysis device to address the above technical problems.

[0004] In a first aspect, the present application further provides an online oil chromatography analysis device, comprising:

[0005] Device integrated housing;

[0006] Multiple functional modules are arranged in the integrated housing of the device; the multiple functional modules include an oil collector module for obtaining an insulating oil sample, a degassing chamber module for separating oil and gas from the insulating oil sample, a carrier gas module for supplying a carrier gas to transport the characteristic gas obtained after the oil and gas separation, a chromatographic column module for separating the characteristic gas, and a detection unit module for detecting the separated characteristic gas;

[0007] The device integrated housing includes a first outer surface, a second outer surface, and a third outer surface with different functional areas; with respect to the first outer surface, at least a portion of the oil extractor module, the degassing chamber module, and the detection unit module related to oil and gas processing are located in an inner area of ​​the housing corresponding to the first outer surface;

[0008] The second outer surface is provided with a plurality of interfaces for connecting with external devices;

[0009] The third outer surface is provided with an electrical control module for controlling the operation of the device.

[0010] In one embodiment, the third outer surface is further provided with a power module including a charging management circuit for powering the device; and / or,

[0011] The first outer surface includes an embedded operating unit for interactively operating the carrier gas module, the chromatographic column module and the detection unit module.

[0012] In one embodiment, the device further comprises a shock absorbing structure, wherein the shock absorbing structure is used to buffer the vibrations to which the device is subjected during movement;

[0013] The shock absorbing structure includes: an internal shock absorbing structure provided between the functional module and the device integrated housing, and / or an external shock absorbing structure provided on an outer wall of the device integrated housing.

[0014] In one embodiment, the internal shock-absorbing structure includes a rubber pad or a spring as an elastic support member; and / or the external shock-absorbing structure includes a shock-absorbing foot pad or a shock-absorbing frame.

[0015] In one embodiment, the carrier gas module includes a miniature high-pressure gas cylinder or a gas generator, and a sensor and controller for monitoring and controlling the pressure and flow of the carrier gas;

[0016] The chromatographic column module comprises a heating element and a temperature sensor for controlling the temperature of the chromatographic column, wherein the heating element cooperates with the temperature sensor to maintain the temperature of the chromatographic column module within a preset range;

[0017] A degassing membrane or filler is provided inside the degassing cavity module.

[0018] In one embodiment, the inner area of ​​the shell corresponding to the first outer surface further includes a detachable waste oil collection unit module, which collects waste oil through a waste oil pipeline and is provided with a liquid level sensor for monitoring the amount of waste oil.

[0019] In one embodiment, the carrier gas module and the degassing chamber module are connected via an air pipeline; the air pipeline includes a gas filtration module for filtering and purifying the gas generated by the degassing chamber module.

[0020] In one embodiment, the oil extractor module and the degassing chamber module are connected via an oil pipeline; the oil pipeline includes an oil sample filtering module for filtering and purifying the insulating oil sample extracted by the oil extractor module.

[0021] In one embodiment, the second outer surface is further provided with a heat dissipation module for dissipating heat; and / or the interface includes at least one of a data communication interface, a carrier gas replacement interface, and a disassembly interface of a waste oil collection unit.

[0022] In a second aspect, the present application further provides an insulating oil analysis method based on an online oil chromatography analysis device, the method being applied to any of the above-mentioned devices, the method comprising:

[0023] Obtaining insulating oil samples through the oil sampling module;

[0024] transporting the insulating oil sample to the degassing chamber module to separate characteristic gases;

[0025] Using the carrier gas generated by the carrier gas module, the characteristic gas is transported to the chromatographic column module for separation;

[0026] The characteristic gas separated by the chromatographic column module is detected by the detection unit module.

[0027] The above-mentioned online oil chromatography analysis device and the insulating oil analysis method based on the online oil chromatography analysis device change the loose planar layout of traditional equipment by assigning the three major functional systems of oil and gas processing, external interface, and electrical control to the areas corresponding to the first, second, and third outer surfaces respectively, so that all functional modules can be efficiently stacked in three dimensions within the integrated shell of the device. Secondly, the core analysis components such as the oil extractor, degassing chamber, and detection unit are all placed in the first outer surface area, ensuring that the oil and gas pipelines between them are more reasonable. At the same time, the electrical control module is isolated in the third outer surface area, realizing the physical separation of oil, gas and electricity, and ensuring the long-term stability of the equipment operation. Finally, all multiple interfaces that need to be connected to the outside are concentrated on the second outer surface, providing a more convenient access method, thereby improving the analysis efficiency of online oil chromatography analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a structural block diagram of an online oil chromatography analysis device in one embodiment;

[0030] Figure 2 A structural block diagram of the inner area of ​​the housing corresponding to the first outer surface in one embodiment;

[0031] Figure 3 is a structural block diagram corresponding to the second outer surface in one embodiment;

[0032] Figure 4 is a structural block diagram corresponding to the third outer surface in one embodiment;

[0033] Figure 5 is a structural block diagram of a shock absorbing structure in one embodiment;

[0034] Figure 6 A block diagram of the structure of oil sample transmission and gas transmission in one embodiment;

[0035] Figure 7 Schematic diagram of a flow chart of an insulating oil analysis method based on an online oil chromatography analysis device in one embodiment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] It should be noted that the terms "first", "second", etc. used in this application may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "including" and "having" used in this application and any variations thereof are intended to cover non-exclusive inclusions. The term "plurality" used in this application refers to two or more. The term "and / or" used in this application refers to one of the solutions or any combination of multiple solutions.

[0038] In an exemplary embodiment, the present application provides a highly integrated online oil chromatography analysis device, comprising:

[0039] An integrated device housing; multiple functional modules disposed within the integrated device housing; the multiple functional modules include an oil extractor module for obtaining an insulating oil sample, a degassing chamber module for performing oil-gas separation on the insulating oil sample, a carrier gas module for supplying a carrier gas to transport characteristic gases obtained after the oil-gas separation, a chromatographic column module for separating the characteristic gases, and a detection unit module for detecting the separated characteristic gases;

[0040] For example, the device Figure 1 As shown, the device integrated housing provides a compact and sturdy mounting base for all functional modules. Multiple functional modules work together to complete the online analysis of dissolved gas in insulating oil. These modules include at least:

[0041] The oil sampling module, used to obtain insulating oil samples from external oil-immersed electrical equipment, is designed with a dedicated oil sampling syringe and interface for fast and accurate sampling of insulating oil. The oil sampling syringe is made of corrosion-resistant materials such as stainless steel or polytetrafluoroethylene, ensuring that the oil sample is not contaminated during the sampling process. The oil sampling interface is compatible with the sampling valve of the oil-immersed electrical equipment and uses a well-sealed connection method such as a threaded connection or a quick-disconnect connector to ensure no leakage during sampling. The oil sampling module is connected to the main body of the device via a movable connection structure, facilitating sampling operations at different locations.

[0042] The degassing chamber module, used to separate insulating oil samples from gases and extract characteristic gases, features a miniaturized design to improve degassing efficiency. Its structural design incorporates fluid mechanics principles to ensure uniform flow of the oil sample within the degassing chamber, enhancing degassing effectiveness. The degassing chamber module connects to the oil extractor module and the subsequent gas flow system to achieve continuous degassing of the oil sample.

[0043] The carrier gas module generates stable carrier gas for transporting characteristic gases as the mobile phase. It utilizes a miniaturized carrier gas storage and supply device, such as a small high-pressure gas cylinder or gas generator, to provide a stable carrier gas for chromatographic analysis. The carrier gas module is located on the side of the device for easy replacement and maintenance. The type of carrier gas can be selected based on the detection requirements, such as nitrogen and hydrogen.

[0044] The chromatographic column module used for separating mixed characteristic gases can adopt a miniaturized chromatographic column, such as a capillary column or a micro-filled column, and select a suitable stationary phase according to different detection gas components to achieve effective separation of the gas mixture.

[0045] The detection unit module is used to detect and quantify the characteristic gas components after separation. It utilizes highly sensitive sensors, such as a flame ionization detector (FID) and a thermal conductivity detector (TCD), to detect the separated gases. The detection unit module is tightly connected to the chromatographic column module to ensure rapid response and accurate acquisition of detection signals. The detection unit incorporates signal amplification and processing circuitry to convert the weak sensor output into a recognizable electrical signal, which is then transmitted to the control module for data processing and analysis.

[0046] The device's integrated housing includes first, second, and third outer surfaces with distinct functional zones. Functional modules are rationally categorized and arranged in distinct zones based on their technical attributes and functional types to maximize space utilization and system reliability.

[0047] For the first outer surface, at least part of the oil extractor module, the degassing chamber module and the detection unit module related to oil and gas processing are located in the inner area of ​​the shell corresponding to the first outer surface.

[0048] Specifically, the first outer surface can be exemplarily understood as the front side of the device, such as Figure 2 The corresponding internal area of ​​the housing is defined as the core oil and gas analysis zone of the device. At least one or more of the oil extractor module, degassing chamber module, and detection unit module, all directly related to oil and gas processing, are centrally located in this area. This minimizes the physical length of the oil and gas lines connecting these core analysis components, effectively reducing dead volume and sample adsorption, thereby improving analytical sensitivity and result accuracy.

[0049] The second outer surface is provided with a plurality of interfaces for connecting with external devices.

[0050] Specifically, the second outer surface can be exemplarily understood as the side of the device, such as Figure 3 The area shown is defined as the device's external connection area. Multiple interfaces for connecting to external devices are centrally located on this surface. These interfaces facilitate power supply, data communication, carrier gas replacement, and waste oil disposal. All on-site operations can be completed on this centralized operating surface, greatly improving ease of use.

[0051] The third outer surface is provided with an electrical control module for controlling the operation of the device.

[0052] The third outer surface can be understood as the reverse side of the device, for example Figure 4 The area shown is defined as the device's electrical control area. The electrical control module, which controls the automated operation of the entire device, is located in this area. Physically isolating the electrical control module from the oil and gas processing area on the first outer surface effectively protects the circuit from oil and gas contamination or corrosion, and reduces electromagnetic interference from electrical components on highly sensitive detection signals, thereby ensuring the device's long-term operational stability and safety.

[0053] In this embodiment, by assigning the three major functional systems of oil and gas processing, external interface, and electrical control to the areas corresponding to the first, second, and third outer surfaces respectively, the loose planar layout of the traditional equipment is changed, so that all functional modules can be efficiently stacked in three dimensions within the integrated shell of the device. Secondly, the core analysis components such as the oil extractor, degassing chamber, and detection unit are all placed in the first outer surface area, ensuring that the oil and gas pipelines between them are more reasonable. At the same time, the electrical control module is isolated in the third outer surface area, realizing the physical separation of oil, gas and electricity, and ensuring the long-term stability of the equipment operation. Finally, all multiple interfaces that need to be connected to the outside are concentrated on the second outer surface, providing a more convenient access method, thereby improving the analysis efficiency of online oil chromatography analysis.

[0054] In an exemplary embodiment, the third outer surface is further provided with a power module including a charging management circuit for powering the device; and / or, the first outer surface includes an embedded operating unit for interactively operating the carrier gas module, the chromatographic column module and the detection unit module.

[0055] In one embodiment, Figure 4As shown, the third outer surface (i.e., the back of the device) houses not only the electrical control module but also a power module. This power module provides the power required for all functional modules of the device, enabling independent operation without an external power source and playing a key role in achieving its portability. In this embodiment, the power module preferably comprises a rechargeable lithium battery pack with a built-in charge management circuit. This charge management circuit is responsible for safely controlling the battery's charge and providing overcharge / over-discharge protection, effectively ensuring the device's safety and battery life.

[0056] In another embodiment, Figure 2 As shown, the first outer surface (i.e., the front of the device) may include an embedded operating unit. This embedded operating unit serves as the device's human-machine interface, allowing operators to directly configure and control the device on-site. Specifically, the operator can use this unit to perform a series of interactive operations, such as setting the flow rate of the carrier gas module, setting the temperature parameters of the chromatographic column module, and starting or stopping data acquisition in the detection module. The embedded operating unit transmits the operator's input commands to the electrical control module located on the third outer surface for processing and execution, and displays the analysis results and device status in real time.

[0057] In this embodiment, an additional power module including a charge management circuit is installed on the third outer surface, achieving energy independence. Furthermore, an embedded operating unit integrated into the first outer surface allows for direct on-site operation, including parameter setting, process initiation, and data reading. This significantly simplifies the on-site testing workflow, shortens preparation time, reduces operator dependency, and makes the entire analysis process more efficient, intuitive, and convenient.

[0058] In an exemplary embodiment, the device further comprises a shock absorbing structure for buffering vibrations to which the device is subjected during movement;

[0059] The shock-absorbing structure includes: an internal shock-absorbing structure arranged between the functional module and the device integrated shell, and / or an external shock-absorbing structure arranged on the outer wall of the device integrated shell.

[0060] Specifically, if Figure 5 As shown, the shock absorbing structure may be a composite double protection system, which may include an internal shock absorbing structure and / or an external shock absorbing structure.

[0061] In one embodiment, the device is equipped with an internal shock-absorbing structure. This internal shock-absorbing structure is located between each functional module and the device's integrated housing or internal frame. Its function is to provide a flexible layer of isolation for the internal core module after vibration is transmitted to the device body, preventing the direct transmission of impact forces caused by rigid connections.

[0062] In another embodiment, the device is equipped with an external shock-absorbing structure. This structure is directly attached to the outer wall of the device's integrated housing, serving as a first line of defense against external shock. Its function is to directly absorb and dissipate vibrations from the ground or external impact energy during device placement and transportation, thereby reducing the impact force transmitted to the device at its source.

[0063] In this embodiment, the dual shock absorption design combining internal and external elements ensures the durability and high reliability of the device, enabling it to adapt to complex on-site environments and ensuring measurement accuracy in long-term use.

[0064] In an exemplary embodiment, the internal shock-absorbing structure includes a rubber pad or a spring as an elastic support member; and / or the external shock-absorbing structure includes a shock-absorbing foot pad or a shock-absorbing frame.

[0065] Specifically, for the internal shock-absorbing structure, the core is to use elastic support members to replace the traditional rigid fixing method. Figure 5 As shown, the elastic support members can be specifically rubber pads or springs. For example, vibration-sensitive functional modules within the device (such as a chromatography column module or a detection unit module) can be mounted on an internal baseboard. Multiple springs or high-damping rubber pads are then placed between the baseboard and the device's integrated housing to create a flexible connection between the baseboard and the housing. When external vibrations are transmitted to the housing, these elastic support members effectively absorb and dissipate the vibration energy, significantly reducing the vibration amplitude transmitted to the core functional modules.

[0066] For external shock-absorbing structures, they are intended to provide protection directly from the outside of the equipment. Figure 5 As shown, the external shock-absorbing structure can be specifically a shock-absorbing foot pad or a shock-absorbing frame. The shock-absorbing foot pad can be made of a highly elastic rubber material and installed at the bottom of the device's integrated housing. When the device is placed on a vibrating platform (such as a vehicle floor or next to a generator), these foot pads can effectively isolate vibrations from the contact surface. The shock-absorbing frame can be installed at the edge of the device's integrated housing or at corners that are prone to collision. It can provide effective cushioning during equipment transportation, preventing damage to the housing and internal modules due to accidental bumps.

[0067] In this embodiment, rubber pads or springs are used as internal shock-absorbing structures, and shock-absorbing foot pads or shock-absorbing frames are provided on the outside, thereby enhancing the environmental adaptability and durability of the device.

[0068] In an exemplary embodiment, the carrier gas module includes a miniature high-pressure gas cylinder or a gas generator, and a sensor and controller for monitoring and controlling the pressure and flow of the carrier gas;

[0069] The chromatographic column module includes a heating element and a temperature sensor for controlling the temperature of the chromatographic column, and the heating element and the temperature sensor cooperate to maintain the temperature of the chromatographic column module within a preset range;

[0070] A degassing membrane or filler is provided inside the degassing chamber module.

[0071] Specifically, the carrier gas module can include a miniature high-pressure gas cylinder or a gas generator as the gas source. Using a miniature high-pressure gas cylinder allows for quick replacement and is suitable for intermittent or emergency testing tasks. Using a gas generator (such as one that produces hydrogen through water electrolysis or nitrogen through pressure swing adsorption) allows the device to operate without changing the gas source for extended periods, achieving a higher level of integration and automation. To ensure the repeatability of chromatographic analysis, the module also integrates sensors and controllers for real-time monitoring and control of carrier gas pressure and flow. These sensors and control units work in conjunction with the device's electrical control module to form a closed-loop control loop, ensuring a constant carrier gas flow rate to the chromatographic column, which is essential for achieving stable and reliable analytical results.

[0072] The column module utilizes precise constant temperature control. This module consists of a heating element (such as a heating film or resistance wire) that fits snugly within the column and a high-precision temperature sensor. During operation, the temperature sensor measures the column temperature in real time and provides feedback to the electrical control module. The electrical control module then adjusts the power applied to the heating element based on the preset analysis temperature. Together, these two elements maintain the column module temperature precisely within a preset range (e.g., ±0.1°C).

[0073] The degassing chamber module is equipped with a degassing membrane or packing. The membrane's different permselectivities for gases and liquids allow for rapid separation of gaseous components from the oil sample. Packing (such as glass beads or specialized fibers) significantly increases the specific surface area of ​​the oil sample. Under vacuum or carrier gas purge conditions, it accelerates the release of dissolved gases based on the principle of gas-liquid equilibrium.

[0074] In this embodiment, the above-mentioned device design achieves stable, controllable and long-lasting carrier gas supply; constant temperature control effectively avoids the influence of ambient temperature fluctuations on gas peak time, ensuring the accuracy of analysis results; the interior of the degassing chamber module is provided with a degassing membrane or filler, which can improve the degassing efficiency and make it possible to detect low-concentration fault gas.

[0075] In an exemplary embodiment, the inner area of ​​the shell corresponding to the first outer surface further includes a detachable waste oil collection unit module, which collects waste oil through a waste oil pipeline and is provided with a liquid level sensor for monitoring the amount of waste oil.

[0076] Specifically, the device further includes a waste oil collection unit module, such as Figure 2As shown, the waste oil collection unit module can be optionally arranged on the first outer surface of the device (ie, the front of the device) to facilitate intuitive monitoring and operation by the operator.

[0077] The waste oil collection unit module is designed to be detachable. For example, it can be a snap-on or drawer-style container, or a replaceable sealed waste oil bag. This detachable design allows operators to quickly and easily remove the waste oil collection unit from the main unit for disposal and replacement once the waste oil is full, greatly simplifying maintenance.

[0078] Inside the device, the insulating oil (i.e., waste oil) treated in the degassing chamber module is channeled through a dedicated waste oil pipeline and collected in the waste oil collection unit. To enable automated monitoring, this module is also equipped with a liquid level sensor. This sensor monitors the waste oil level in the container in real time. When the waste oil level reaches a preset warning level, the level sensor triggers a signal to the device's electrical control module, which then issues an alarm or prompts the user through the embedded operating unit, reminding them to replace the waste oil collection unit promptly.

[0079] In this embodiment, by realizing the detachable structure of the waste oil mobile phone unit, the leakage and pollution of waste oil that may occur during the transfer process is effectively avoided. At the same time, the design of the liquid level sensor effectively prevents the risk of waste oil overflow, thereby improving the automation level and safety of the device.

[0080] In an exemplary embodiment, the carrier gas module and the degassing chamber module are connected via a gas pipeline; the gas pipeline includes a gas filtration module for filtering and purifying the gas generated by the degassing chamber module.

[0081] Specifically, in Figure 6 In the illustrated framework, the carrier gas module and the degassing chamber module (oil-gas separator) are connected via a gas pipeline system. More specifically, the characteristic gas containing multiple components separated from the degassing chamber module is combined with the stable carrier gas flow output from the carrier gas module in the gas pipeline, and then both are transported to the subsequent chromatographic column module for separation.

[0082] The gas pipeline also includes a gas filtration module. This module is typically located after the outlet of the degassing chamber module and before the inlet of the chromatographic column module. During the actual oil-gas separation process, trace amounts of water or other non-gaseous impurities may escape from the degassing chamber module along with the characteristic gas. If these impurities enter the chromatographic column directly, they can irreversibly contaminate and damage the stationary phase within it, resulting in reduced separation efficiency and a significant shortening of the column's lifespan. Passing these gases through the filtration module (e.g., using a microporous filter membrane or a specific adsorbent) effectively intercepts these harmful impurities.

[0083] Optionally, the exhaust gas after detection is discharged from the device through the exhaust gas discharge pipeline. The gas pipeline is made of corrosion-resistant and well-sealed materials, such as stainless steel pipes or polytetrafluoroethylene pipes, and the pipeline connections are welded or sealed joints to ensure that there is no leakage in the gas pipeline.

[0084] In this embodiment, by providing a filter module on the gas pipeline, it is ensured that only pure gas samples to be measured enter the chromatographic column, thereby ensuring the long-term operation stability of the entire analysis system and the accuracy of the measurement results.

[0085] In an exemplary embodiment, the oil extractor module and the degassing chamber module are connected via an oil pipeline; the oil pipeline includes an oil sample filtering module for filtering and purifying the insulating oil sample extracted by the oil extractor module.

[0086] Specifically, in Figure 6 In the illustrated framework, a sealed oil pipeline connects the oil extraction module (offline oil extraction port) to the degassing chamber module (oil-gas separator). After the oil extraction module extracts an insulating oil sample from the device under test, the sample is precisely transported through this pipeline to the degassing chamber module for subsequent oil-gas separation.

[0087] In order to protect the delicate flow paths and analytical components inside the device, a key technical feature is that an oil sample filter module is integrated into the oil pipeline. The oil sample filter module is located between the outlet of the oil extractor module and the inlet of the degassing chamber module. In one embodiment, the insulating oil extracted from on-site electrical equipment may contain solid impurities such as metal particles and insulating paper scraps generated during operation. If these impurities enter the interior of the equipment with the oil sample, it is very easy to cause blockage of small pipelines or damage the delicate structures in the degassing chamber (such as the degassing membrane). Therefore, the oil sample filter module can intercept and remove solid particle impurities in the oil sample before it enters the core analysis system.

[0088] Optionally, after the oil sample is degassed in the degassing chamber module, the waste oil is transported to the waste oil collection unit module via a waste oil pipeline. The oil pipeline design takes into account the fluidity and sealing properties of the oil sample, using appropriate pipe diameters and pipeline directions to ensure smooth flow and no leakage of the oil sample.

[0089] In this embodiment, by providing a filter in the oil pipeline, not only the risk of system blockage is avoided at the source, ensuring the smooth flow of the oil system, but also the reliability and durability of the entire device operation are improved.

[0090] In an exemplary embodiment, the second outer surface is further provided with a heat dissipation module for heat dissipation; and / or the interface includes at least one of a data communication interface, a carrier gas replacement interface, and a disassembly interface of a waste oil collection unit.

[0091] Specifically, if Figure 3 As shown, since the device integrates multiple heat-generating components, including an electrical control module, a power module, and a chromatographic column heater, effective heat dissipation is crucial for maintaining stable performance of the internal electronic components and accurate analytical results. In this embodiment, the heat dissipation module can be a passive heat dissipation structure, such as multiple sets of heat dissipation grilles or fins, which utilize natural convection to dissipate internal heat. Alternatively, to meet higher heat dissipation requirements, it can be an active heat dissipation structure, such as one or more built-in cooling fans that force airflow through the device, efficiently removing heat and ensuring stable operation even in high-temperature environments.

[0092] Specifically, the multiple interfaces on the second outer surface may include one or more of the following:

[0093] The data communication interface can be a USB port, Ethernet (network) port, or a built-in wireless communication module (such as Wi-Fi, Bluetooth). This interface allows the analysis data to be easily exported to an external computer or uploaded to a cloud server, facilitating data storage, in-depth analysis, and remote monitoring.

[0094] The carrier gas replacement interface can be a physical interface designed for rapid carrier gas module replacement, such as a standardized quick-connect fitting or a conveniently accessible hatch. This interface allows operators to quickly replace carrier gas cylinders without removing the device's integrated housing, significantly reducing maintenance time and ensuring a continuous supply of carrier gas.

[0095] The disassembly interface of the waste oil collection unit can be a specific structure that realizes the detachable function of the waste oil collection unit module, for example, it can be a slide rail, a snap or a locking device, so that the removal and installation of the waste oil collection unit becomes simple and reliable.

[0096] In this embodiment, by integrating the heat dissipation module and the second outer surface with multiple interfaces, the device exhibits higher environmental adaptability, stronger data processing capabilities and better user maintenance experience.

[0097] In one embodiment, in the field of power equipment condition monitoring, analyzing dissolved gases in the insulating oil of oil-immersed power equipment (such as transformers and reactors) is a key technical means of early warning of potential internal equipment faults. When faults such as overheating or partial discharge occur within the equipment, the insulating oil decomposes and produces a variety of characteristic gases, such as hydrogen, methane, ethane, ethylene, acetylene, and carbon monoxide. By analyzing the composition and content of these gases, the operating status of the equipment can be effectively assessed.

[0098] Existing oil chromatography analysis technologies primarily fall into two categories: The first is traditional laboratory-based online oil chromatography analysis devices. These devices are typically complex and bulky, requiring fixed installation. They operate by sending oil samples collected on-site to a laboratory for offline analysis. This results in long monitoring cycles and an inability to reflect the fault's evolution in real time. Furthermore, their high cost and complex operating procedures limit their application in mobile or remote locations.

[0099] The second type is a portable oil chromatography analyzer, developed to overcome the shortcomings of the first solution. However, these portable devices currently on the market still have significant technical flaws in their structural design: First, the integration of various functional components is generally low, resulting in a relatively large overall size and weight, and not truly lightweight. Second, the internal gas and oil pipelines are poorly designed, prone to leakage and blockage during transport and on-site use, directly affecting the reliability of test results. Third, the devices lack seismic resistance, and during bumpy transportation, the precision optical or mechanical components within are prone to loosening or damage, resulting in performance degradation or even failure.

[0100] Due to the technical problems in the above embodiments, the present application arises as the times require, and provides a highly integrated online oil chromatography analysis device.

[0101] The entire device is housed in an integrated device housing, which is structurally divided into a first outer surface (front), a second outer surface (side), and a third outer surface (back) with clear functions. All functional modules are optimally arranged in corresponding functional partitions according to their properties.

[0102] The first exterior surface (front) houses the core analysis and operation area of ​​the device. This area houses the oil extractor module, degassing chamber module, and detection unit module, all directly related to oil and gas processing. Furthermore, to facilitate on-site operation, a recessed operating unit is located above this surface, allowing users to interactively perform operations such as parameter setting and process control. Below this surface is a removable waste oil collection unit, such as a replaceable waste oil bag, for collecting analyzed waste oil.

[0103] The second outer surface (side) houses the device's external connections and auxiliary functions. This area houses heat dissipation modules, such as fans and grilles, to ensure stable operation. This area also houses multiple interfaces, including a data communication port for data transmission, a carrier gas replacement port for quick maintenance, and a removal port for the waste oil collection unit.

[0104] The third outer surface (the reverse side) is the device's electrical core. This area houses the main circuit board for the electrical control module, which controls the entire device's operation. To ensure portable power, this area also houses a power module containing a rechargeable lithium-ion battery pack and charge management circuitry, ensuring independent operation and safe charging.

[0105] To ensure reliability in mobile and field environments, the device is equipped with a comprehensive shock-absorbing structure. This structure consists of two parts: an internal shock-absorbing structure located between the functional module and the housing, which flexibly secures the core module using elastic supports such as rubber pads or springs; and an external shock-absorbing structure located outside the housing, such as the shock-absorbing foot pads at the bottom and the shock-absorbing frame at the edges, which absorbs external shocks.

[0106] Within the device, the internal structure and flow paths of each functional module have also been optimized. The carrier gas module uses a miniature high-pressure gas cylinder or gas generator as its gas source and is equipped with sensors and controllers to achieve precise closed-loop control of the carrier gas flow rate. The chromatographic column module uses built-in heating elements and temperature sensors to achieve precise constant temperature control of the column temperature. The degassing chamber module is equipped with a degassing membrane or filler to improve the efficiency of oil-gas separation. In terms of flow paths, the oil extractor module and the degassing chamber module are connected by an oil pipeline, which also contains an oil sample filter module to remove impurities in the oil. The carrier gas module and the degassing chamber module are connected by a gas pipeline, which also contains a gas filter module to purify the gas sample entering the chromatographic column.

[0107] In this embodiment, through the design ideas of miniaturization, modularization and high integration, structural components such as carrier gas, oil extractor, degassing chamber, chromatographic column, detection unit, waste oil collection unit, etc. are rationally arranged to achieve ubiquitous deployment and plug-and-play functions of the device, improve the portability, reliability and detection performance of the device, and meet the needs of on-site real-time monitoring and mobile detection of oil-immersed power equipment.

[0108] The present invention also provides an insulating oil analysis method based on the online oil chromatography analysis device described in any of the above embodiments. Figure 7 As shown, the method includes:

[0109] Step S701: Obtain an insulating oil sample through an oil collector module.

[0110] For example, at the start of the analysis, the operator connects the device's oil sampler module to the sampling valve of the oil-immersed electrical equipment under test. After initiating the analysis process via the embedded operating unit or external commands, the oil sampler module automatically extracts a predetermined amount of insulating oil sample from the equipment. In an optional embodiment, the extracted oil sample is pre-processed by an oil sample filtration module in the oil pipeline before entering subsequent modules to remove any solid particulate impurities.

[0111] Step S702: transport the insulating oil sample to a degassing chamber module to separate characteristic gases.

[0112] For example, the filtered insulating oil sample is delivered to the degassing chamber module. Inside this module, a built-in degassing membrane or filler utilizes membrane separation or gas-liquid equilibrium principles to rapidly release characteristic gases such as hydrogen, methane, ethylene, and acetylene dissolved in the oil, forming a mixed gas to be analyzed. The degassed waste oil is then directed to the waste oil collection unit module.

[0113] Step S703 : Using the carrier gas generated by the carrier gas module, the characteristic gas is transported to the chromatographic column module for separation.

[0114] Exemplarily, the carrier gas module generates and outputs a high-purity carrier gas with a constant flow rate. The carrier gas acts as a mobile phase and carries the characteristic gas separated from the degassing chamber module in the gas pipeline to form a mixed gas flow. In a preferred embodiment, the gas flow passes through a gas filtration module before entering the chromatographic column to remove any oil mist that may be entrained. Subsequently, the mixed gas flow enters the chromatographic column module that is precisely thermostatically controlled. Since different gas components have different adsorption or distribution capabilities on the stationary phase in the chromatographic column, they will move forward at different speeds driven by the carrier gas, thereby being effectively separated.

[0115] Step S704: Detecting the characteristic gas separated by the chromatographic column module through the detection unit module.

[0116] For example, after separation by the chromatographic column module, the characteristic gases of each component arrive at the detection unit module in chronological order. The detector generates an electrical signal corresponding to each arriving gas, with the signal strength proportional to the gas concentration. The electrical control module collects, amplifies, and processes these signals, ultimately generating a chromatogram and automatically calculating the exact content of each characteristic gas, completing the entire online analysis process.

[0117] In this embodiment, by completing the above steps in a closed loop on a single, mobile device, real-time diagnosis of equipment status is achieved, significantly improving the timeliness of fault warnings. Furthermore, because the entire analysis process is automatically performed within an optimized internal flow path, human intervention is reduced and the risk of sample contamination and loss during transportation is avoided, thereby ensuring the high reliability of the analysis results. Ultimately, this method simplifies professional chromatographic analysis into a convenient, on-site operation, improving the efficiency and convenience of power equipment status monitoring.

[0118] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of the steps or stages in other steps or other steps. It is understandable that the various steps in different embodiments can be freely combined as needed, and the various non-contradictory schemes formed by the combination all fall within the scope of protection of this application.

[0119] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0120] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0121] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0122] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0123] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An online oil chromatography analysis device, characterized in that: The device comprises: Device integrated housing; Multiple functional modules are arranged in the integrated housing of the device; the multiple functional modules include an oil collector module for obtaining an insulating oil sample, a degassing chamber module for separating oil and gas from the insulating oil sample, a carrier gas module for supplying a carrier gas to transport the characteristic gas obtained after the oil and gas separation, a chromatographic column module for separating the characteristic gas, and a detection unit module for detecting the separated characteristic gas; The device integrated housing includes a first outer surface, a second outer surface, and a third outer surface with different functional areas; with respect to the first outer surface, at least a portion of the oil extractor module, the degassing chamber module, and the detection unit module related to oil and gas processing are located in an inner area of ​​the housing corresponding to the first outer surface; The second outer surface is provided with a plurality of interfaces for connecting with external devices; The third outer surface is provided with an electrical control module for controlling the operation of the device.

2. The device according to claim 1, characterized in that The third outer surface is further provided with a power module including a charging management circuit for supplying power to the device; and / or, The first outer surface includes an embedded operating unit for interactively operating the carrier gas module, the chromatographic column module and the detection unit module.

3. The device according to claim 1, characterized in that The device further comprises a shock absorbing structure, wherein the shock absorbing structure is used to buffer the vibrations to which the device is subjected during movement; The shock absorbing structure includes: an internal shock absorbing structure provided between the functional module and the device integrated housing, and / or an external shock absorbing structure provided on an outer wall of the device integrated housing.

4. The device according to claim 3, characterized in that The internal shock-absorbing structure includes a rubber pad or a spring as an elastic support member; and / or the external shock-absorbing structure includes a shock-absorbing foot pad or a shock-absorbing frame.

5. The device according to claim 1, characterized in that The carrier gas module includes a miniature high-pressure gas cylinder or a gas generator, and a sensor and controller for monitoring and controlling the pressure and flow of the carrier gas; The chromatographic column module comprises a heating element and a temperature sensor for controlling the temperature of the chromatographic column, wherein the heating element cooperates with the temperature sensor to maintain the temperature of the chromatographic column module within a preset range; A degassing membrane or filler is provided inside the degassing cavity module.

6. The device according to claim 1, characterized in that The inner area of ​​the shell corresponding to the first outer surface also includes a detachable waste oil collection unit module. The waste oil collection unit module collects waste oil through a waste oil pipeline and is provided with a liquid level sensor for monitoring the amount of waste oil.

7. The device according to claim 6, characterized in that The carrier gas module and the degassing chamber module are connected via an air pipeline; the air pipeline includes a gas filtering module for filtering and purifying the gas generated by the degassing chamber module.

8. The device according to claim 7, characterized in that The oil extractor module and the degassing chamber module are connected via an oil pipeline; the oil pipeline includes an oil sample filtering module for filtering and purifying the insulating oil sample extracted by the oil extractor module.

9. The device according to claim 8, characterized in that The second outer surface is further provided with a heat dissipation module for dissipating heat; and / or the interface includes at least one of a data communication interface, a carrier gas replacement interface, and a disassembly interface of a waste oil collection unit.

10. An insulating oil analysis method based on an online oil chromatography analysis device, characterized in that: The method is applied to the device according to any one of claims 1 to 9, and the method includes: Obtaining insulating oil samples through the oil sampling module; transporting the insulating oil sample to the degassing chamber module to separate characteristic gases; Using the carrier gas generated by the carrier gas module, the characteristic gas is transported to the chromatographic column module for separation; The characteristic gas separated by the chromatographic column module is detected by the detection unit module.

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