Transformer accident oil pool oil-water separation device

Abstract

The utility model discloses a transformer accident oil pool oil -water separation device, include: floating box, its outer periphery is equipped with a plurality of pontoons, and the floating box floats in the oil pool through the pontoon, and the inside space of floating box is equipped with water collecting bin, and the inner top of water collecting bin is equipped with the oil slick collection box and the annular oil collecting tank of the arrangement around oil slick collection box, and the top of oil slick collection box is equipped with oil slick collection inlet, and the tank bottom of oil slick collection box is open and is closed through oil -water separation membrane, oil pump, it sets up at the top of floating box, is used for the oil -water mixture in oil pool through oil slick collection inlet draws into oil slick collection box, motor stirring mechanism, it is installed at the top of floating box, is used for the oil -water mixture in oil slick collection box carries out stirring, and oil collecting pump, it sets up at the top of floating box, is used for the oil that floats in oil slick collection box through oil collecting pipe suction to annular oil collecting tank. The device adopts gravity pre -separation, oil film reinforced separation and motor drive to accelerate to complete the efficient separation of oil -water.

Description

Technical Field

[0001] This utility model relates to the field of oil-water separation technology, and more specifically to an oil-water separation device for a transformer accident oil pool. Background Technology

[0002] Transformers play a vital role in power systems, enhancing their stability during operation. However, oil-immersed power transformers are susceptible to insulating oil leakage. If leakage is not addressed promptly, the leaked oil, after prolonged immersion in rainwater, can form contaminated material that can harm the surrounding environment and even damage the transformer and the equipment itself.

[0003] Transformer accident oil pools are mainly used to collect mixtures of oil and rainwater that leak from transformer faults, aging or breakdown of oil insulation, and other sources, preventing the oil-water mixture from being directly discharged into the environment and causing damage to the ecological environment.

[0004] Traditional oil-water separation methods for accident oil pools mainly rely on gravity separation, which uses the density difference between oil and water to cause the oil to float and separate. However, this method is inefficient and slow.

[0005] Therefore, how to provide a transformer accident oil-water separation device that can improve oil-water separation efficiency is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides an oil-water separation device for transformer accident oil pool that can improve oil-water separation efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A transformer emergency oil-water separation device includes:

[0009] A floating tank is provided with multiple buoys on its outer periphery. The floating tank floats in the oil pool through the buoys. The internal space of the floating tank is provided with a water collection chamber. The top of the water collection chamber is provided with a floating oil collection tank and an annular oil collection tank arranged around the floating oil collection tank. The top of the floating oil collection tank is provided with a floating oil collection inlet. The bottom of the floating oil collection tank is open and sealed by an oil-water separation membrane.

[0010] An oil pump, which is located at the top of the floating tank, is used to pump the oil-water mixture in the oil pool into the floating oil collection tank through the floating oil collection inlet;

[0011] An electric stirring mechanism is installed at the top of the floating tank and is used to stir the oil-water mixture in the oil collection tank.

[0012] An oil collecting pump is installed at the top of the floating tank and is used to draw oil floating in the oil collection tank into the annular oil collecting tank through the oil collecting pipe.

[0013] Furthermore, it also includes a filter box fixed to the top of the floating box, the filter outlet of the filter box is connected to the floating oil collection inlet, the oil pump port is connected to the oil pumping pipe extending into the oil pool, the oil pump outlet is connected to an oil outlet pipe, and the pipe opening away from the oil pump extends into the filter box.

[0014] The motor stirring mechanism is fixed on the filter box.

[0015] Furthermore, the filter box includes:

[0016] The tank is fixed to the top of the floating tank, and the bottom of the tank is provided with a filter outlet that communicates with the floating oil collection inlet. The outlet of the oil pipe, away from the oil pump, extends into the tank.

[0017] A ring-shaped filter screen, wherein multiple ring-shaped filter screens are arranged with inner and outer layers spaced apart, and the filter outlet is located inside the innermost ring-shaped filter screen;

[0018] The motor stirring mechanism is fixed to the box body.

[0019] Furthermore, the motor stirring mechanism includes:

[0020] A motor base, the bottom end of which is fixedly connected to the top end of the housing;

[0021] A stirring motor is fixed to the top of the motor base. A stirring rod is fixed to the drive shaft of the stirring motor. The stirring rod extends into the oil collection tank through the filter outlet and the oil collection inlet.

[0022] Furthermore, a rain cover is fixed to the stirring motor, and the rain cover is equipped with an audible and visual alarm.

[0023] Furthermore, a water level detector for detecting changes in the oil tank level is fixed at the bottom of the float.

[0024] Furthermore, the top of the floating box is equipped with a water level interface instrument for detecting the water level in the water collection tank and a drainage pump for pumping the water in the water collection tank into the oil tank.

[0025] Furthermore, the top of the floating box is equipped with an oil level interface instrument for detecting the oil level in the annular oil collection tank and an oil pump for extracting oil from the annular oil collection tank. An oil storage tank is fixed on one side of the floating box, and the oil discharge pipe of the oil pump is connected to the oil storage tank.

[0026] Furthermore, the float is mounted on the outer periphery of the floating box via an up-and-down position adjustment component.

[0027] Furthermore, a mounting plate is fixed to the outer periphery of the top of the floating box, and the vertical position adjustment component includes:

[0028] An adjusting screw is provided, which passes through the mounting plate. Two clamping nuts are screwed onto the adjusting screw, and the float is clamped and fixed between the two clamping nuts.

[0029] Two locking nuts are provided, each screwed onto the adjusting screw, and the two locking nuts respectively abut against the top and bottom surfaces of the mounting plate.

[0030] The above-mentioned device is controlled by a PLC controller (not shown) installed on the floating box. When the water level detector 13 detects that the liquid level of the oil-water mixture in the oil tank exceeds the set threshold warning value (the set threshold warning value is 10% of the height of the accident oil tank), the separation device is activated. When the flow rate of the oil-water mixture flowing into the accident oil tank exceeds the separation capacity of the separation device, an emergency mechanism needs to be activated. In order to ensure the safe and reliable operation of the system, a threshold limit value is set. The liquid level threshold limit value is the maximum height that the liquid level of the oil-water mixture in the accident oil tank can reach (the maximum height that can be reached is 70% of the height of the accident oil tank). When the water level detector 13 detects that the water level in the oil tank is higher than the threshold limit value, it means that the liquid level in the oil tank has exceeded the safety threshold and a dangerous situation may occur. At this time, the audible and visual alarm 22 will issue an alarm signal. The audible and visual signal issued by the audible and visual alarm 22 can attract the attention of the staff immediately, handle the situation in a timely manner, and provide rapid feedback to avoid problems caused by delays and prevent safety accidents and equipment accidents caused by abnormal liquid level. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a front view cross-sectional structural diagram of a transformer accident oil-water separation device provided by this utility model.

[0033] Figure 2 This is a top view of the oil-water separation device for a transformer accident oil tank provided by this utility model.

[0034] Figure 3 This is a schematic diagram of the internal structure of the floating box of a transformer accident oil-water separation device provided by this utility model.

[0035] Figure 4 This is a top view of the filter box. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] See Figures 1-4 As shown in the figure, this utility model embodiment discloses an oil-water separation device for a transformer emergency oil tank, comprising:

[0041] A floating box 1 is provided with multiple buoys 2 around its outer perimeter. For example, four buoys 2 are installed at the four corners of the floating box 1. The floating box 1 floats in the oil tank through the buoys 2. The internal space of the floating box 1 is provided with a water collection chamber 3. The top of the water collection chamber 3 is provided with a floating oil collection box 4 and an annular oil collection box 5 arranged around the floating oil collection box 4. The top of the floating oil collection box 4 is provided with a floating oil collection inlet 401. The bottom of the floating oil collection box 4 is open and closed by an oil-water separation membrane 402. Water in the floating oil collection box 4 can pass through the oil-water separation membrane 402 into the water collection chamber 3, while oil will not pass through the oil-water separation membrane 402 into the water collection chamber 3.

[0042] Oil pump 6 is installed at the top of the floating tank 1 and is used to pump the oil-water mixture in the oil pool into the floating oil collection tank 4 through the floating oil collection inlet 401.

[0043] The motor stirring mechanism 7 is installed at the top of the floating box 1 and is used to stir the oil-water mixture in the floating oil collection box 4.

[0044] Oil collecting pump 8 (which can be a high-temperature oil pump TS-63 with a flow rate of 42L / min and a rated power of 370W, capable of continuous operation for 24 hours to ensure continuous and stable output of the system) is located at the top of the floating tank 1 and is used to draw the oil floating in the floating oil collection tank 4 into the annular oil collecting tank 5 through the oil collecting pipe 81.

[0045] The device's oil pump 6 draws the oil-water mixture from the oil tank into the floating oil collection tank 4. Within the floating oil collection tank 4, gravity-oil film coupling separation-motor-driven accelerated separation technology is employed to improve the oil-water separation effect and efficiency. Specifically, efficient separation is achieved through the following stages:

[0046] Gravity pre-separation: utilizing oil (density approximately 0.8-0.9 g / cm³) 3 ) and water (density 1g / cm³) 3 Due to the density difference, the oil first floats to the upper part of the separation area of ​​the oil collection tank 4, forming a preliminary stratification.

[0047] Oil film enhanced separation: An oil-water separation membrane 402 is installed at the bottom of the floating oil collection tank 4. Specifically, an oleophilic and hydrophobic polypropylene (PP) fiber membrane (contact angle: oil phase 25°, water phase 110°, pore size 10-20μm) can be used. Oil droplets are adsorbed and attached to the membrane surface through capillary action, forming a stable oil film layer. Water, due to its higher density and the oil-water separation membrane's repulsion of water-based substances, is discharged from the bottom guide holes of the membrane and enters the water collection tank.

[0048] Motor-driven acceleration: A low-speed motor stirring mechanism 7 (motor speed 5-10r / min, power 0.1kW) is built into the floating oil collection tank 4. The stirring creates micro-vortices, which break the oil droplet emulsion structure, allowing the oil droplets to be more evenly adsorbed onto the oil film surface, preventing the oil droplets from entering the water collection tank, and shortening the gravity separation time.

[0049] The oil separated in the floating oil collection tank 4 is pumped by the oil collection pump 8 into the annular oil collection tank 5 for temporary storage.

[0050] In other embodiments, a filter box 9 is also included, which is fixed to the top of the floating box 1. The filter outlet 901 of the filter box 9 is connected to the floating oil collection inlet 401. The oil pump 6 is connected to the oil pump pipe 10 that extends into the oil pool. The oil pump 6 is connected to the oil outlet pipe 11. The pipe opening of the oil outlet pipe 11 that is away from the oil pump 6 extends into the filter box 9.

[0051] The motor stirring mechanism 7 is fixed on the filter box 9.

[0052] Filter box 9 includes:

[0053] The box 91 is fixed to the top of the floating box 1. The bottom of the box 91 is provided with a filter outlet 901 that is connected to the floating oil collection inlet 401. The pipe opening on the oil outlet pipe 11 that is away from the oil pump 6 extends into the box 91.

[0054] The annular filter 92 (which can have a mesh size of 150 mesh) consists of multiple annular filters arranged with inner and outer layers spaced apart, and the filter outlet 901 is located inside the innermost annular filter 92.

[0055] The motor stirring mechanism 7 is fixed on the box body 91.

[0056] In this way, the annular filter screen 92 can intercept large impurities or floating objects in the oil-water mixture, preventing impurities or floating objects from entering the oil collection tank 4 and ensuring the smooth separation of oil and water.

[0057] The electric stirring mechanism 7 includes:

[0058] Motor base 71, the bottom end of motor base 71 is fixedly connected to the top end of housing 91;

[0059] A stirring motor 72 is fixed to the top of the motor base 71. The drive shaft of the stirring motor 72 is fixed with a stirring rod 73. The stirring rod 73 extends into the oil collection tank 4 through the filter outlet 901 and the oil collection inlet 401, thereby stirring the oil and water in the oil collection tank 4. The stirring forms a micro vortex, which breaks the oil droplet emulsion structure, so that the oil droplets are more evenly adsorbed onto the oil film surface, and at the same time shortens the gravity separation time.

[0060] In some embodiments, a rain cover 12 is fixed on the stirring motor 72, and an audible and visual alarm 22 is provided on the rain cover 12.

[0061] The rain cover 12 covers the entire mixing motor 72, which can effectively isolate rainwater from the mixing motor 72 and prevent faults such as reduced insulation performance and short circuits in the windings caused by rain, thus ensuring the reliability of motor operation. The audible and visual alarm 22 is set so that if the liquid level in the accident oil tank is higher than the limit value, it means that the liquid level in the oil tank has exceeded the safety threshold, and the audible and visual alarm will issue an alarm signal. At this time, the audible and visual signal emitted by the audible and visual alarm can attract the attention of the staff and deal with it in time.

[0062] In other embodiments, a water level detector 13 (model QDY70A-FQ, measuring range 0-2m, capable of normal operation under complex water conditions) is fixed at the bottom of the float 2 for detecting changes in the oil level in the oil tank. In this way, the device adopts the liquid level trigger start-up method, that is, when the water level detector 13 detects that the liquid level in the oil tank is higher than the threshold warning value, the oil-water separation device can be quickly started to perform oil-water separation, thereby ensuring the operation of the transformer and environmental protection.

[0063] In some embodiments, the top of the floating box 1 is provided with a water level interface instrument 14 for detecting the water level in the water collection tank 3 and a drainage pump 15 for pumping the water in the water collection tank 3 into the oil tank.

[0064] The top of the floating box 1 is equipped with an oil level interface instrument 16 for detecting the oil level in the annular oil collection tank 5 and an oil pump 17 for extracting oil from the annular oil collection tank 5. An oil storage tank 18 is fixed on one side of the floating box 1, and the oil discharge pipe 19 of the oil pump 17 is connected to the oil storage tank 18.

[0065] In this way, when the water level interface instrument 14 and the oil level interface instrument 16 detect that the water level in the water collection tank 3 and the oil level in the annular oil collection tank 5 are higher than the set value, the separated water and oil can be extracted by the drain pump 15 and the oil pump 17 to ensure that the water collection tank 3 and the annular oil collection tank 5 have sufficient storage space.

[0066] In another embodiment of this utility model, the float 2 is mounted on the outer periphery of the floating box 1 via a vertical position adjustment component 20. Specifically, a mounting plate 21 is fixed to the outer periphery of the top of the floating box 1, and the vertical position adjustment component 20 includes:

[0067] An adjusting screw 201 is mounted on a mounting plate 21. Two clamping nuts 202 are screwed onto the adjusting screw 201, and the float 2 is clamped and fixed between the two clamping nuts 202.

[0068] There are two locking nuts 203, both of which are screwed onto the adjusting screw 201. The two locking nuts 203 abut against the top and bottom surfaces of the mounting plate 21, respectively.

[0069] In this embodiment, by loosening the two locking nuts 203, the adjusting screw 201 can be moved up and down, thereby adjusting the up and down position of the float 2, so that the positions of the multiple floats 2 are basically consistent, avoiding the floating box 1 from tilting and floating due to the multiple floats 2 being at different heights.

[0070] Internal transformer faults (such as winding short circuits or core overheating) can cause a rapid increase in oil temperature, potentially leading to an explosion and transformer oil leakage. A transformer emergency oil sump can contain leaked hot oil, preventing it from flowing onto the ground or other equipment and reducing the risk of fire spread. The core component of the water level detector installed on the oil-water separator is a float that rises on the water surface. When the water level rises, the float rises; when the water level falls, the float falls accordingly. The vertical displacement of the float reflects the change in the water level in the emergency oil sump. The water level monitor feeds back the change in the water level in the emergency oil sump to the PLC controller via a data transmission channel. Upon receiving the water level signal, the PLC controller automatically determines whether the water level exceeds a threshold warning value. If it does, the PLC controller sends a control signal to control the oil pump to extract the oil-water mixture to a filter tank, where impurities or floating matter are filtered out. After filtration and screening, the oil flows into the floating oil collection tank. Within the tank, the oil-water mixture undergoes initial separation via gravity pre-separation, enhanced oil film separation, and motor-driven acceleration. The separated water flows through the oil-water separation membrane into the water collection tank, while the oil flows into the oil collection tank under the action of the oil collection pump. The water level information in the water collection tank is fed back to the water level interface instrument, which transmits the signal to the PLC controller via a data transmission channel. Upon receiving the signal, the PLC controller automatically determines the water level. If the water level is too high, it controls the drain pump to remove water from the collection tank, ensuring the water level does not become excessively high. Similarly, the oil level information in the oil collection tank is fed back to the oil level interface instrument, which transmits the signal to the PLC controller via a data transmission channel. The PLC controller then determines the oil level and, if the oil level is too high, controls the drain pump to remove oil from the collection tank, again ensuring the oil level does not become excessively high, thus completing the final oil-water separation.

[0071] The oil-water separation device employs a level-triggered system as the commissioning judgment method for the PLC-based transformer emergency oil tank oil-water separation system. Using a level discrimination method, a threshold warning value (10% of the emergency oil tank level) set by the PLC-based transformer emergency oil tank oil-water separation device system is compared with the current level. The commissioning of the PLC-based transformer emergency oil tank oil-water separation device system is determined based on this comparison. The threshold warning value is reasonably selected based on the size of the emergency oil tank, the actual operating conditions of the transformer, and the extent of oil leakage. An excessively high value may lead to delayed handling of oil leaks, while an excessively low value may trigger the oil-water separation device even under normal oil fluctuations. The level-triggered system enables the rapid activation of the oil-water separation device in emergency situations such as oil leaks, further ensuring transformer operation and environmental protection.

[0072] In addition, to ensure the stability and reliability of the control logic, some protective designs have been implemented. When the liquid level exceeds the threshold limit, an audible and visual alarm will sound to alert personnel, facilitating timely intervention and preventing safety accidents or equipment malfunctions caused by abnormal liquid levels. If a fault or abnormality occurs during operation, the machine will stop and transmit the fault signal to the PLC controller without affecting subsequent processes. Normal operation will resume after the fault has been resolved.

[0073] This invention proposes a PLC-controlled oil-water separation device for transformer accident oil pools that can automatically start according to the liquid level, enabling the oil-water separation process to proceed quickly and automatically, improving the oil-water separation effect, realizing automated control and intelligent operation of the oil-water separation device, solving the problem of environmental pollution caused by oily wastewater in accident oil pools, improving the safety and reliability of transformer operation, and reducing the dependence on manual labor in the oil-water separation process. It has good application prospects and promotion significance.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transformer emergency oil-water separation device, characterized in that, include: A floating box (1) is provided with multiple buoys (2) on its outer periphery. The floating box (1) floats in the oil pool through the buoys (2). The internal space of the floating box (1) is provided with a water collection chamber (3). The top of the water collection chamber (3) is provided with a floating oil collection box (4) and an annular oil collection box (5) arranged around the floating oil collection box (4). The top of the floating oil collection box (4) is provided with a floating oil collection inlet (401). The bottom of the floating oil collection box (4) is open and closed by an oil-water separation membrane (402). An oil pump (6) is installed at the top of the floating tank (1) to pump the oil-water mixture in the oil pool into the floating oil collection tank (4) through the floating oil collection inlet (401). The motor stirring mechanism (7) is installed at the top of the floating box (1) and is used to stir the oil-water mixture in the oil collection box (4); An oil collecting pump (8) is installed at the top of the floating tank (1) to draw the oil floating in the oil collecting tank (4) into the annular oil collecting tank (5) through the oil collecting pipe (81).

2. The transformer emergency oil-water separation device according to claim 1, characterized in that, It also includes a filter box (9) fixed at the top of the floating box (1), the filter outlet (901) of the filter box (9) is connected to the floating oil collection inlet (401), the oil pump (6) is connected to the oil pump pipe (10) extending into the oil pool, the oil pump (6) is connected to the oil outlet pipe (11), and the outlet of the oil pump (6) extends into the filter box (9) away from the oil pump (6). The motor stirring mechanism (7) is fixed on the filter box (9).

3. The transformer accident oil-water separation device according to claim 2, characterized in that, The filter box (9) includes: The box (91) is fixed at the top of the floating box (1). The bottom of the box (91) is provided with the filter outlet (901) which is connected to the floating oil collection inlet (401). The pipe opening of the oil outlet pipe (11) away from the oil pump (6) extends into the box (91). A ring filter (92) is provided, wherein multiple ring filters (92) are arranged with inner and outer layers spaced apart, and the filter outlet (901) is located inside the innermost ring filter (92). The motor stirring mechanism (7) is fixed on the box body (91).

4. The transformer accident oil-water separation device according to claim 3, characterized in that, The motor stirring mechanism (7) includes: Motor base (71), the bottom end of which is fixedly connected to the top end of the housing (91); A stirring motor (72) is fixed to the top of the motor base (71). The driving shaft of the stirring motor (72) is fixed with a stirring rod (73). The stirring rod (73) extends into the oil collection tank (4) through the filter outlet (901) and the oil collection inlet (401).

5. The transformer accident oil-water separation device according to claim 4, characterized in that, A rain cover (12) is fixed on the stirring motor (72), and an audible and visual alarm (22) is provided on the rain cover (12).

6. A transformer emergency oil-water separation device according to any one of claims 1-5, characterized in that, The bottom end of the float (2) is fixed with a water level detector (13) for detecting changes in the oil tank level.

7. A transformer emergency oil-water separation device according to any one of claims 1-5, characterized in that, The top of the floating box (1) is equipped with a water level interface instrument (14) for detecting the water level in the water collection tank (3) and a drainage pump (15) for pumping the water in the water collection tank (3) into the oil tank.

8. A transformer emergency oil-water separation device according to any one of claims 1-5, characterized in that, The top of the floating box (1) is equipped with an oil level interface instrument (16) for detecting the oil level in the annular oil collection tank (5) and an oil pump (17) for extracting oil from the annular oil collection tank (5). An oil storage tank (18) is fixed on one side of the floating box (1), and the oil discharge pipe (19) of the oil pump (17) is connected to the oil storage tank (18).

9. A transformer emergency oil-water separation device according to any one of claims 1-5, characterized in that, The float (2) is installed on the outer periphery of the floating box (1) by means of an up-down position adjustment component (20).

10. The transformer accident oil-water separation device according to claim 9, characterized in that, The top outer periphery of the floating box (1) is fixed with a mounting plate (21), and the vertical position adjustment component (20) includes: An adjusting screw (201) is inserted through the mounting plate (21), and two clamping nuts (202) are screwed onto the adjusting screw (201). The float (2) is clamped and fixed between the two clamping nuts (202). Two locking nuts (203) are screwed onto the adjusting screw (201), and the two locking nuts (203) respectively abut against the top and bottom surfaces of the mounting plate (21).

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