Modularized gas collection vibration monitoring device based on oil-immersed transformer
By using a modular gas sampling vibration monitoring device to monitor the internal condition of an oil-immersed transformer in real time, the problem of lag in traditional monitoring methods is solved, enabling early fault detection and convenient maintenance, and extending the service life of the transformer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TANGSHAN COLLEGE
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional oil-immersed transformer monitoring methods are mostly reactive, which means that components are already damaged after a fault occurs, reducing their service life.
Design a modular gas sampling and vibration monitoring device based on an oil-immersed transformer. The device integrates vibration monitoring and flue gas monitoring structures to monitor the internal state of the transformer in real time. Data is collected and analyzed in real time through a gas sampling probe and a vibration monitoring mechanism.
This enables timely detection of problems in the early stages of a fault, preventing serious damage to components, extending the service life of the transformer, and reducing maintenance difficulty and cost.
Smart Images
Figure CN224231743U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of monitoring device technology, and in particular to a modular gas sampling vibration monitoring device based on an oil-immersed transformer. Background Technology
[0002] In modern power systems, oil-immersed transformers serve as core equipment, undertaking critical tasks such as voltage transformation, power distribution, and transmission. The stability of their operating status directly affects the reliable power supply of the entire power system. Because transformers operate in complex electromagnetic and thermal environments for extended periods, internal faults are difficult to detect. Once a fault occurs, it may lead to large-scale power outages, causing huge economic losses and social impacts. Therefore, real-time and accurate status monitoring of oil-immersed transformers is of paramount importance.
[0003] Traditional oil-immersed transformer monitoring mostly begins after a fault has occurred, focusing on detecting the flue gas and vibration frequency generated by the transformer. This reactive monitoring approach is severely delayed. By the time a fault appears, the internal components of the oil-immersed transformer have often already suffered varying degrees of damage, which can easily lead to a reduction in the transformer's service life.
[0004] Therefore, to address the aforementioned shortcomings, a modular gas sampling and vibration monitoring device based on an oil-immersed transformer can be designed. By integrating vibration monitoring and flue gas monitoring structures, real-time monitoring can be performed inside the oil-immersed transformer, thereby facilitating the solution of the above problems. Utility Model Content
[0005] To overcome the shortcomings of traditional oil-immersed transformer monitoring, which mostly involves detecting the flue gas and vibration frequency generated by the transformer only after a fault has occurred, and where components are often damaged to varying degrees by the time the fault is apparent, thus easily reducing the service life of the oil-immersed transformer.
[0006] The technical solution is as follows: A modular gas sampling and vibration monitoring device based on an oil-immersed transformer includes a control box, a fixed base plate, a cover, a display panel, a control mechanism, a gas sampling probe, and a vibration monitoring mechanism. The control box has a fixed base plate at the rear for suspending the monitoring device. Inside the control box is a control mechanism for control purposes. In front of the control mechanism is a display panel for displaying relevant data. The front of the control box is fitted with a cover for sealing the control box. The surface of the cover has a display opening to accommodate the display panel. One side of the control box has a vibration monitoring mechanism for monitoring the vibration of the oil-immersed transformer, and the other side of the control box has a gas sampling probe for monitoring the decomposition gases from the transformer oil.
[0007] Furthermore, the control mechanism includes a circuit board, on the surface of which a control unit, a storage unit, and a wireless module are integrated. A corresponding battery pack is located below the circuit board, and support brackets for supporting the display panel are provided on both sides of the circuit board.
[0008] Furthermore, the upper end of the control box is symmetrically provided with two sets of transmission female connectors, which are electrically connected to the circuit board. An external slot is provided at the front edge of the control box, and the rear edge of the box cover is matched and engaged with the control box through the external slot.
[0009] Furthermore, a gas monitoring module is fixedly installed on the outer end of the gas sampling probe. The outer end of the gas monitoring module is equipped with a primary transmission cable. One end of the primary transmission cable is connected to the gas monitoring module, and the other end of the primary transmission cable is equipped with a primary transmission sub-connector. The primary transmission sub-connector is matched and plugged into one of the sets of transmission female connectors.
[0010] Furthermore, the lower end of the gas monitoring module is provided with a connecting sleeve, and the lower part of the gas acquisition probe is provided with an arc-shaped clamp. The outer end of the arc-shaped clamp is provided with a connecting shaft, and the upper end of the connecting shaft extends into the interior of the connecting sleeve.
[0011] Furthermore, the vibration monitoring mechanism includes a vibration monitoring module. The rear end of the vibration monitoring module is provided with a connecting plate for connecting to a transformer. Multiple sets of connecting rods are provided between the connecting plate and the vibration monitoring module. The connecting plate and the vibration monitoring module are connected through the connecting rods. Multiple sets of fixing holes are opened around the surface edge of the connecting rods. A buffer pad is attached to the side of the connecting plate away from the vibration monitoring module.
[0012] Furthermore, the external end of the vibration monitoring module is equipped with a secondary transmission cable. One end of the secondary transmission cable is connected to the vibration monitoring module, and the other end of the secondary transmission cable is equipped with a secondary transmission sub-connector, which is matched and engaged with another set of transmission female connectors.
[0013] Furthermore, the fixed base plate has multiple sets of fixing pins on the side near the control box, and the rear end of the control box has a fixing slot corresponding to the fixing pins. Both sides of the fixed base plate are provided with mounting strips, and the surface of the mounting strips has multiple sets of mounting holes linearly formed.
[0014] The beneficial effect is that, compared with the shortcomings of traditional oil-immersed transformer monitoring, this application uses a vibration monitoring mechanism and a gas sampling probe to collect data in real time, and the control unit performs real-time analysis and processing of the data. This enables the detection of problems at the incipient stage of a fault, thereby avoiding serious damage to components and extending the service life of the transformer. The independent modular design of the gas sampling probe and vibration monitoring mechanism, along with their independent disassembly and replacement operation process, allows maintenance personnel to easily locate and resolve faults, reducing maintenance difficulty and costs. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the modular gas sampling vibration monitoring device of this application;
[0016] Figure 2 This is a three-dimensional structural diagram of the fixed base plate and fixed plug assembly of this application;
[0017] Figure 3 This is a three-dimensional structural diagram of the control box and cover assembly of this application;
[0018] Figure 4 This is a three-dimensional structural diagram of the control box and control mechanism assembly of this application;
[0019] Figure 5 This is a three-dimensional structural diagram of the gas sampling probe and arc-shaped clamp combination of this application;
[0020] Figure 6 This is a three-dimensional structural diagram of the vibration monitoring mechanism of this application.
[0021] Explanation of reference numerals in the attached drawings: 1. Fixed base plate; 101. Fixed pin; 102. Mounting strip; 103. Mounting hole; 2. Control box; 201. Fixed slot; 202. External slot; 3. Box cover; 301. Display port; 4. Display panel; 5. Control mechanism; 501. Circuit board; 502. Control unit; 503. Storage unit; 504. Wireless module; 6. Gas sampling probe; 7. Vibration monitoring mechanism; 701. Connecting plate; 702. Buffer pad; 703. Fixed hole; 704. Connecting rod; 705. Vibration monitoring module; 8. Battery pack; 9. Support bracket; 10. Transmission female connector; 11. Gas monitoring module; 12. Connecting sleeve; 13. Primary transmission cable; 14. Primary transmission sub-connector; 15. Arc-shaped clamp; 16. Connecting shaft; 17. Secondary transmission cable; 18. Secondary transmission sub-connector. Detailed Implementation
[0022] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] An oil-immersed transformer mainly consists of a core, windings, oil tank, oil conservator, breather, radiator, and insulating bushings. The core is the magnetic circuit part of the transformer, typically made of stacked silicon steel sheets to reduce eddy current losses. The windings are the electrical circuit part, made of copper or aluminum wires, and consist of primary and secondary windings. They convert electrical energy through electromagnetic induction. The oil tank is the outer shell of the transformer, housing the core, windings, and transformer oil. The oil conservator is located above the oil tank and connected to it via a connecting pipe. Its function is to regulate the volume change of the transformer oil and reduce the contact area between the oil and air, thus slowing down oil aging. The breather contains a desiccant to absorb moisture from the air entering the oil conservator, preventing the transformer oil from becoming damp and leaking out. Heaters are installed on both sides of the oil tank to dissipate the heat generated during transformer operation into the surrounding environment through heat conduction and convection. Insulating bushings are used to bring out the winding leads, ensuring good insulation between the leads and the oil tank. Based on the principle of electromagnetic induction, when the primary winding is connected to an AC power source, an alternating magnetic field is generated in the iron core. This alternating magnetic field induces an electromotive force in the secondary winding. Due to the different number of turns in the primary and secondary windings, voltage transformation is achieved. According to the law of conservation of energy, in an ideal situation, the input power equals the output power, that is, the apparent power on the primary side equals the apparent power on the secondary side. By changing the turns ratio of the primary and secondary windings, different voltage levels can be obtained to meet the electricity needs of different users.
[0024] Transformer oil possesses excellent insulation properties, effectively insulating the windings from the core, between windings, and between windings and the tank, thus improving the transformer's insulation strength and reliability. Simultaneously, transformer oil also has arc-extinguishing properties, rapidly extinguishing arcs generated by short circuits or other faults within the transformer, preventing the fault from escalating. Oil-immersed transformers transfer heat through the circulating flow of transformer oil. Transformer oil has a high specific heat capacity, absorbing a significant amount of heat. The hot oil rises to the top of the tank, cools through the radiator, and then flows back to the bottom, forming a natural circulation that effectively dissipates heat from within the transformer, ensuring operation within the normal temperature range. Due to the presence of transformer oil, oil-immersed transformers possess a certain overload capacity. In short periods, when the load exceeds the rated capacity, the transformer oil absorbs more heat, causing the transformer's temperature to rise relatively slowly, thus allowing the transformer to operate under overload conditions to a certain extent, improving the flexibility and reliability of the power system.
[0025] Regular maintenance of transformers is crucial for ensuring their normal operation. Maintenance includes regularly changing transformer oil, cleaning the radiator, checking the desiccant in the breather, and tightening connections. Transformer oil gradually ages and degrades over time, requiring regular oil quality testing and timely replacement based on test results. Dust and dirt easily accumulate on the radiator surface, affecting heat dissipation; therefore, regular cleaning is necessary. The desiccant in the breather becomes ineffective after absorbing moisture and needs timely replacement to maintain its drying performance. Connections may loosen over time and require regular inspection and tightening to prevent overheating due to poor contact.
[0026] Oil-immersed transformers are widely used in various parts of the power system, including power plants, substations, industrial enterprises, commercial buildings, and residential communities. In power plants, they are used to raise the low-voltage electrical energy generated by generators to a high voltage suitable for long-distance transmission. In substations, they are used to convert high-voltage electrical energy into low voltage suitable for user use. In industrial enterprises, they provide a stable power supply for various production equipment. In commercial buildings and residential communities, they provide power for electrical equipment such as lighting, air conditioning, and elevators. In short, oil-immersed transformers play a vital role in the power system due to their excellent insulation performance, heat dissipation capacity, and overload capacity. They are one of the key pieces of equipment for ensuring a safe, stable, and reliable power supply. A thorough understanding of their structure, principles, characteristics, operation and maintenance, and application areas helps in the better use and management of oil-immersed transformers, thereby improving the operating efficiency and reliability of the power system.
[0027] Oil-immersed transformers generate a certain degree of vibration during operation. Under normal circumstances, this vibration is relatively stable and small. However, when a fault occurs, the vibration will be significantly aggravated and may be accompanied by abnormal noise, such as irregular sounds other than a "humming" sound, such as "squeaking" or "crackling" sounds. The causes of the fault are: First, short circuit in the winding. When a short circuit occurs in the winding, additional electromagnetic force is generated, which leads to increased vibration. Second, loose core. The core is an important part of the transformer. If the core clamping device is loose, the gap between the silicon steel sheets increases. Under the action of an alternating magnetic field, the core will generate greater vibration and noise. Third, loose external connection parts, such as the transformer leads and tap changers, will also generate vibration and noise during operation due to the action of electromagnetic force.
[0028] A properly functioning oil-immersed transformer should not produce significant smoke. When a fault occurs, smoke may emerge from the transformer's breather, cooling pipes, etc. The color and odor of the smoke will vary. For example, white smoke with a burnt smell may appear, or black smoke with a pungent odor. The causes of the fault are: 1. Internal overheating: Due to overload of the transformer windings, local overheating of the core, etc., the transformer oil will decompose and produce gas. When the temperature is too high, smoke will be produced. 2. Insulation damage: During long-term operation, the transformer's insulation material may age or become damp, leading to a decrease in insulation performance and insulation breakdown, which will generate an electric arc, causing the transformer oil and insulation material to burn and produce smoke. 3. External fire sources: If a fire occurs around the transformer, the flames will spread to the transformer, also causing it to produce smoke.
[0029] Example 1
[0030] like Figures 1-6 As shown, a modular gas sampling and vibration monitoring device based on an oil-immersed transformer includes a control box 2, a fixed base plate 1, a box cover 3, a display panel 4, a control mechanism 5, a gas sampling probe 6, and a vibration monitoring mechanism 7. The fixed base plate 1 for suspending the monitoring device is located at the rear of the control box 2. The control mechanism 5 for control is located inside the control box 2. The display panel 4 for displaying relevant data is located in front of the control mechanism 5. The box cover 3 for sealing the control box 2 is located at the front end. The surface of the box cover 3 has a display port 301 for accommodating the display panel 4. The vibration monitoring mechanism 7 for monitoring the vibration of the oil-immersed transformer is located on one side of the control box 2. The gas sampling probe 6 for monitoring the decomposition gas of the transformer oil is located on the other side of the control box 2.
[0031] The control mechanism 5 includes a circuit board 501. The surface of the circuit board 501 integrates a control unit 502, a storage unit 503, and a wireless module 504. A corresponding battery pack 8 is located below the circuit board 501. Support brackets 9 for supporting the display panel 4 are provided on both sides of the circuit board 501. By integrating the control unit 502, storage unit 503, and wireless module 504 on the surface of the circuit board 501, multiple key functions are concentrated into one. The battery pack 8 provides an independent power supply for the control mechanism 5 and the entire monitoring device. The support brackets 9 accurately support the display panel 4, making it installed stably.
[0032] Two sets of transmission female connectors 10 are symmetrically arranged on the upper end of the control box 2. The transmission female connectors 10 are electrically connected to the circuit board 501. An external slot 202 is provided at the front edge of the control box 2. The rear edge of the box cover 3 is matched and engaged with the control box 2 through the external slot 202. The interface design of the two sets of transmission female connectors 10 makes the data transmission cable connection simple and fast, and facilitates the replacement or maintenance of the gas sampling probe 6 and the vibration monitoring mechanism 7.
[0033] A gas monitoring module 11 is fixedly installed on the outer end of the gas sampling probe 6. A primary transmission cable 13 is provided on the outer end of the gas monitoring module 11. One end of the primary transmission cable 13 is connected to the gas monitoring module 11, and the other end of the primary transmission cable 13 is provided with a primary transmission sub-connector 14. The primary transmission sub-connector 14 is matched and plugged into one of the sets of transmission female connectors 10. Through the gas monitoring module 11 and the gas sampling probe 6, the composition and concentration changes of the gas generated by the decomposition of transformer oil can be accurately analyzed.
[0034] The lower end of the gas monitoring module 11 is provided with a connecting sleeve 12, and the lower part of the gas sampling probe 6 is provided with an arc-shaped clamp 15. The outer end of the arc-shaped clamp 15 is provided with a connecting shaft 16, and the upper end of the connecting shaft 16 extends into the interior of the connecting sleeve 12. The arc-shaped clamp 15 facilitates the installation and positioning of the gas sampling probe 6.
[0035] The vibration monitoring mechanism 7 includes a vibration monitoring module 705. The rear end of the vibration monitoring module 705 is provided with a connecting plate 701 for connecting to a transformer. Multiple sets of connecting rods 704 are provided between the connecting plate 701 and the vibration monitoring module 705. The connecting plate 701 and the vibration monitoring module 705 are connected by the connecting rods 704. Multiple sets of fixing holes 703 are formed around the edge of the surface of the connecting rods 704. A buffer pad 702 is attached to the side of the connecting plate 701 away from the vibration monitoring module 705. The buffer pad 702 can effectively reduce the hard contact between the connecting plate 701 and the transformer surface when installing the vibration monitoring mechanism 7.
[0036] The vibration monitoring module 705 is equipped with a secondary transmission cable 17 at its outer end. One end of the secondary transmission cable 17 is connected to the vibration monitoring module 705, and the other end of the secondary transmission cable 17 is equipped with a secondary transmission sub-connector 18. The secondary transmission sub-connector 18 is matched and engaged with another set of transmission female connectors 10. The vibration data collected by the vibration monitoring module 705 can be transmitted to the control mechanism 5 in the control box 2 in a timely and accurate manner through the secondary transmission cable 17.
[0037] The fixed base plate 1 has multiple sets of fixing pins 101 on the side near the control box 2. The rear end of the control box 2 has a fixing slot 201 corresponding to the fixing pins 101. Both sides of the fixed base plate 1 have mounting strips 102. The surface of the mounting strips 102 has multiple sets of mounting holes 103 linearly formed. By cooperating with the fixing pins 101 and the fixing slots 201 at the rear end of the control box 2, a tight and stable connection between the control box 2 and the fixed base plate 1 is achieved.
[0038] During operation, the mounting base plate 1 is fixed to the bracket near the transformer using bolts through the mounting strip 102 and mounting holes 103. Then, the control box 2 is fixed by the mounting slot 201 at the rear end in conjunction with the fixing pin 101 to ensure that the monitoring device is securely suspended. Then, the connecting shaft 16 is inserted into the connecting sleeve 12, thereby connecting the gas sampling probe 6 and the arc clamp 15 into a whole. Next, the gas sampling probe 6 is clamped on the transformer oil valve by the arc clamp 15, and the connecting shaft 16 is inserted into the connecting sleeve 12 to complete the mechanical fixation. Then, the first-level transmission sub-connector 14 is inserted into the transmission female connector 10 at the upper end of the control box 2 to realize the electrical signal connection. The connecting plate 701 is attached to the transformer shell and fixed by bolts through the fixing holes 703. The buffer pad 702 reduces external vibration interference. Then, the second-level transmission sub-connector 18 is inserted into another set of transmission female connectors 10 to complete the vibration signal transmission link. Then, the battery pack 8 supplies power to the circuit board 501. After the control unit 502 is initialized, the real-time data can be viewed and the initial threshold can be set through the display panel 4.
[0039] When the oil-immersed transformer is in operation, the gas sampling probe 6 continuously extracts the decomposed gas from the surface of the transformer oil. The gas monitoring module 11 performs infrared spectral analysis on the gas. The data is transmitted to the control unit 502 via the primary transmission cable 13, stored in the storage unit 503, and uploaded to the cloud platform via the wireless module 504. Then, the connecting plate 701 contacts the transformer shell, transmitting the vibration to the vibration monitoring module 705. The vibration monitoring module 705 collects the vibration signal of the transformer shell for monitoring and transmits the signal to the monitoring unit via the connecting rod 704. After filtering out high-frequency noise, the signal is transmitted back to the control box 2 via the secondary transmission cable 17. The control unit 502 performs data comparison and analysis to identify transformer abnormalities.
[0040] Real-time data is displayed on display panel 4. If the gas concentration or vibration amplitude exceeds the threshold, an alarm is triggered, and maintenance personnel can remotely retrieve the data via wireless network.
[0041] Its working principle is as follows: the vibration generated during the operation of the oil-immersed transformer is transmitted to the vibration monitoring module 705 through the connecting plate 701. The vibration monitoring module 705 converts the vibration signal into an electrical signal, which is transmitted to the circuit board 501 in the control box 2 via the secondary transmission cable 17. The control unit 502 on the circuit board 501 analyzes and processes the signal to determine whether the vibration state of the transformer is abnormal. The gas acquisition probe 6 collects the gas generated by the decomposition of transformer oil in real time. The gas enters the gas monitoring module 11, which analyzes and detects the gas composition and concentration, and transmits the detection data to the circuit board 501 in the control box 2 via the primary transmission cable 13. The control unit 502 also analyzes the gas data to determine whether there are any fault hazards such as overheating inside the transformer that cause abnormal gas generation due to oil decomposition.
[0042] Its beneficial effects are significant. By collecting data in real time through the vibration monitoring mechanism 7 and the gas acquisition probe 6, and cooperating with the control unit 502 to analyze and process the data in real time, it is possible to detect problems in the early stage of faults, thereby avoiding serious damage to components and extending the service life of transformers. With the independent modular design of the gas acquisition probe 6 and the vibration monitoring mechanism 7, and the operation process of independent disassembly and replacement, maintenance personnel can easily locate and solve faults, reducing maintenance difficulty and cost.
Claims
1. A modular gas sampling and vibration monitoring device based on an oil-immersed transformer, comprising a control box (2); characterized in that, It also includes a fixed base plate (1), a box cover (3), a display panel (4), a control mechanism (5), a gas sampling probe (6), and a vibration monitoring mechanism (7); a fixed base plate (1) for suspending the monitoring device is provided at the rear of the control box (2), a control mechanism (5) for control is provided inside the control box (2), a display panel (4) for displaying relevant data is provided in front of the control mechanism (5), a box cover (3) for closing the control box (2) is provided at the front end of the control box (2), a display port (301) for accommodating the display panel (4) is provided on the surface of the box cover (3), a vibration monitoring mechanism (7) for monitoring the vibration of the oil-immersed transformer is provided on one side of the control box (2), and a gas sampling probe (6) for monitoring the decomposition gas of transformer oil is provided on the other side of the control box (2).
2. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 1, characterized in that, The control mechanism (5) includes a circuit board (501), on the surface of which a control unit (502), a storage unit (503) and a wireless module (504) are integrated respectively. A battery pack (8) corresponding to it is provided below the circuit board (501), and support brackets (9) for supporting the display panel (4) are provided on both sides of the circuit board (501).
3. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 1, characterized in that, Two sets of transmission female connectors (10) are symmetrically provided on the upper end of the control box (2). The transmission female connectors (10) are electrically connected to the circuit board (501). An external slot (202) is provided at the front edge of the control box (2). The rear edge of the box cover (3) is matched and engaged with the control box (2) through the external slot (202).
4. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 3, characterized in that, A gas monitoring module (11) is fixedly installed on the outer end of the gas sampling probe (6). A primary transmission cable (13) is provided on the outer end of the gas monitoring module (11). One end of the primary transmission cable (13) is connected to the gas monitoring module (11), and the other end of the primary transmission cable (13) is provided with a primary transmission sub-connector (14). The primary transmission sub-connector (14) is matched and plugged into one of the sets of transmission female connectors (10).
5. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 4, characterized in that, The lower end of the gas monitoring module (11) is provided with a connecting sleeve (12), and the lower part of the gas acquisition probe (6) is provided with an arc-shaped clamp (15). The outer end of the arc-shaped clamp (15) is provided with a connecting shaft (16), and the upper end of the connecting shaft (16) extends into the interior of the connecting sleeve (12).
6. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 3, characterized in that, The vibration monitoring mechanism (7) includes a vibration monitoring module (705). The rear end of the vibration monitoring module (705) is provided with a connecting plate (701) for connecting a transformer. Multiple sets of connecting rods (704) are provided between the connecting plate (701) and the vibration monitoring module (705). The connecting plate (701) and the vibration monitoring module (705) are connected by the connecting rods (704). Multiple sets of fixing holes (703) are opened around the edge of the surface of the connecting rods (704). A buffer pad (702) is attached to the side of the connecting plate (701) away from the vibration monitoring module (705).
7. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 6, characterized in that, The vibration monitoring module (705) is equipped with a secondary transmission cable (17) at its outer end. One end of the secondary transmission cable (17) is connected to the vibration monitoring module (705), and the other end of the secondary transmission cable (17) is equipped with a secondary transmission sub-connector (18). The secondary transmission sub-connector (18) is matched and engaged with another set of transmission female connectors (10).
8. The modular gas sampling and vibration monitoring device based on an oil-immersed transformer according to claim 1, characterized in that, The fixed base plate (1) has multiple sets of fixing pins (101) on the side near the control box (2). The control box (2) has a fixing slot (201) corresponding to the fixing pins (101) at the rear end. The fixed base plate (1) has mounting strips (102) on both sides. The mounting strips (102) have multiple sets of mounting holes (103) linearly opened on the surface of the mounting strips (102).