Transformer oil filling equipment

Abstract

The invention discloses transformer oil filling equipment, which belongs to the technical field of power equipment, and comprises a transport vehicle body, a first tank body, a second tank body and a connecting pipe, the first tank body is positioned on the transport vehicle body and is used for storing transformer oil; the second tank body is located on the transport vehicle body, and a heating piece is arranged in the second tank body and used for heating transformer oil. A connecting pipe is communicated with the first tank body and the second tank body; wherein the first tank body is provided with a quantitative adjusting mechanism, and the quantitative adjusting mechanism is used for quantitatively extracting transformer oil from the first tank body and conveying the transformer oil to the second tank body through the connecting pipe. The problems of energy waste, oil quality deterioration and low heating efficiency caused by heating all stored oil in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a transformer oil filling device. Background Technology

[0002] As a key electrical device operating based on the principle of electromagnetic induction, the transformer occupies an irreplaceable core position in the transmission, distribution and end-use of power systems. Its core function is to achieve flexible regulation of AC voltage and current through electromagnetic energy conversion. It can reduce the high voltage generated by power plants to low voltage suitable for industrial production and civil equipment, and reduce line losses by stepping up the voltage in long-distance power transmission, thereby building an efficient and stable power supply network. A transformer mainly consists of two or more coils (windings) and an iron core (or magnetic core). When alternating current passes through the primary coil, it generates an alternating magnetic flux in the iron core. This alternating magnetic flux passes through the secondary coil, inducing an electromotive force according to the law of electromagnetic induction, thus generating a voltage. By changing the turns ratio of the primary and secondary coils, the voltage can be increased or decreased. Transformer oil, as a fractionation product of petroleum, plays a crucial role in transformers, providing insulation, cooling, and arc extinguishing. A transformer oil filling device is a specialized device used to inject insulating oil into transformers and other power equipment. Its core components are a vacuum oil filter and a vacuum pump unit, along with supporting pipelines, valves, instruments, and other accessories. Some devices also have heating, filtration, and exhaust functions. Heating the transformer oil can significantly improve processing efficiency (accelerating degassing and dehydration, enhancing filtration effects) and optimize equipment performance (improving cooling capacity, avoiding damage from low-temperature operation), thereby ensuring oil purity, reducing the risk of insulation failure, and extending the transformer's service life.

[0003] However, existing transformer oil filling equipment has significant drawbacks in operation: regardless of the actual amount of oil to be added, the equipment heats all the transformer oil in the storage tank. When only a small amount of transformer oil is needed, this overall heating method is inefficient and results in a large waste of energy. Furthermore, unnecessary repeated heating of the transformer oil accelerates its chemical degradation, leading to decreased insulation performance, the formation of acidic substances and sludge, thereby shortening the service life of both the transformer oil and the equipment itself.

[0004] In view of this, the present invention provides a new solution to the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a transformer oil filling device that solves the problems of energy waste, oil quality deterioration, and low heating efficiency caused by heating all the stored oil in the prior art.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution.

[0007] A transformer oil filling device, comprising: Transport vehicle body; The first tank, located on the transport vehicle, is used to store transformer oil; The second tank is located on the transport vehicle body and is equipped with a heating element inside for heating the transformer oil; A connecting pipe connects the first tank and the second tank; The first tank is equipped with a quantitative adjustment mechanism for quantitatively extracting transformer oil from the first tank and transporting it to the second tank through the connecting pipe.

[0008] A further preferred embodiment is that the quantitative adjustment mechanism includes a drive rod, an up-and-down drive assembly, a drive disc, and a valve assembly; The drive disc is located inside the first tank and is used to divide the first tank into upper and lower chambers. The lower end of the drive rod is fixed to the drive disc, and the upper end extends out of the first tank. The up-and-down drive assembly is used to drive the drive disc to move up and down in the first tank to inject the transformer oil located in the lower chamber of the first tank into the second tank. The drive disc has a through hole for transformer oil to enter the lower chamber of the first tank from the upper chamber, and the valve assembly is used to open and close the through hole.

[0009] A further preferred embodiment is that the valve assembly includes a valve disc, a valve stem, and a resilient clamping element; The valve disc is rotatably housed within the drive disc. The valve disc has a flow hole corresponding to the through hole. The valve stem is built into the drive rod and connected to the valve disc, and is used to drive the valve disc to rotate so that the flow hole is aligned or misaligned with the through hole. The elastic clamping element is used to apply a clamping force toward the inner wall of the drive disc to achieve a seal.

[0010] A further preferred embodiment is that the elastic clamping component includes a sleeve, a pressure plate, a push rod, an end cap, and a clamping spring; The sleeve is located inside the drive rod and sleeved outside the valve rod. The sleeve is slidably engaged with the drive rod. The pressure plate is fixed to the bottom end of the sleeve and located above the valve disc. The end cap is located above the drive plate, the upper end of the push rod is fixed to the end cap, and the lower end passes through the top wall of the drive plate and abuts against the pressure plate. The compression spring is sleeved on the outside of the top rod, and its two ends abut against the end cover and the top surface of the drive plate, respectively.

[0011] A further preferred embodiment is that the outer wall of the drive rod is provided with scale lines that gradually increase from high to low; The connecting pipe is connected to the lower chamber of the first tank, and a control valve is installed on the connecting pipe.

[0012] A further preferred embodiment is that the up-down drive assembly includes a drive motor, a lead screw mechanism driven by the drive motor, and a bracket connected to the output end of the lead screw mechanism. The bracket is fixedly connected to the drive rod.

[0013] A further preferred embodiment is that the second tank body is provided with a stirring mechanism and a horizontal drive mechanism; The horizontal drive mechanism is used to drive the second tank to move back and forth on the transport vehicle body, and to drive the stirring mechanism to stir the transformer oil in the second tank.

[0014] A further preferred embodiment is that the horizontal drive mechanism includes a drive source, a cam, a fixed plate, a return spring, a guide rod, and a base; The transport vehicle body is equipped with an mounting plate, and the first tank and the second tank are both mounted on the mounting plate. The base is fixed to the second tank and can slide back and forth on the mounting plate. The drive source is used to drive the cam to rotate, the cam is used to push the fixed plate to move in the direction of compressing the return spring, the return spring is sleeved on the guide rod and is used to provide a return elastic force to the fixed plate, so that the cam periodically pushes the fixed plate to move against the force of the return spring when rotating; The guide rod passes through the fixed plate, and the base is fixed to the fixed plate.

[0015] A further preferred embodiment is that the stirring mechanism includes a stirring shaft, a stirring paddle, a transmission gear, a rack, and a mounting bracket; The stirring shaft is located inside the second tank, the stirring paddle is mounted on the stirring shaft and used to stir the transformer oil inside the second tank, the transmission gear is located above the second tank and fixed to the upper end of the stirring shaft, the rack is located on one side of the transmission gear and meshes with it, and the rack is mounted on the mounting plate through the mounting bracket.

[0016] A further preferred embodiment is that the second tank body is provided with a transparent observation window and a cleaning mechanism, wherein the cleaning mechanism is used to remove impurities outside the observation window; The cleaning mechanism includes a driven gear, a transmission rod, a cleaning plate, and a fixed column. The driven gear meshes with the transmission gear and is used to drive the transmission rod to rotate. The transmission rod and the fixed column are both vertically arranged and pass through the cleaning plate. The cleaning plate and the transmission rod are threaded together. The cleaning plate is equipped with a cleaning section for wiping the observation window.

[0017] In summary, the present invention has the following beneficial effects: The transformer oil filling device of the present invention includes a transport vehicle body, a first tank, a second tank, and a connecting pipe; the first tank is located on the transport vehicle body and is used to store transformer oil; the second tank is located on the transport vehicle body and is equipped with a heating element inside for heating the transformer oil; the connecting pipe connects the first tank and the second tank; wherein, the first tank is provided with a quantitative adjustment mechanism for quantitatively extracting transformer oil from the first tank and transporting it to the second tank through the connecting pipe.

[0018] This invention, by heating transformer oil after metering, ensures that only the approximate amount of transformer oil is heated. This not only improves the heating efficiency of the device but also avoids the resource waste caused by heating all the transformer oil, thus improving energy utilization efficiency. Furthermore, by heating only the required amount of transformer oil, it avoids the consequences of repeated heating, such as accelerated chemical degradation, decreased insulation performance, and shortened equipment lifespan. It also reduces the reliance on operator experience, allowing even novices to quickly complete the oil filling operation. The metering adjustment mechanism can approximate the required amount of oil based on the transformer model and capacity requirements, improving oil filling accuracy. Simultaneously, the dual-tank design physically isolates storage and heating functions. The first tank focuses on oil storage, while the second tank uses a built-in heating element to target and heat the metered oil. This design avoids the energy waste caused by traditional equipment that heats the entire batch, focusing only on the oil to be used, reducing equipment energy consumption, preventing chemical degradation of unused oil due to repeated heating, and ensuring the insulation performance and service life of the transformer oil. This solves the problems of energy waste, oil quality deterioration, and low heating efficiency caused by heating all stored oil in existing technologies. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the overall structure of a transformer oil filling device according to a preferred embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of a transformer oil filling device according to a preferred embodiment of the present invention; Figure 3 This is a partial structural diagram of a transformer oil filling device according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the quantitative adjustment mechanism structure of a preferred embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the first tank body according to a preferred embodiment of the present invention; Figure 6 yes Figure 5 Enlarged schematic diagram of structure A in the middle; Figure 7 This is a cross-sectional schematic diagram of the sleeve according to a preferred embodiment of the present invention; Figure 8 This is a cross-sectional schematic diagram of the valve disc according to a preferred embodiment of the present invention; Figure 9 This is a partial structural diagram of a transformer oil filling device according to a preferred embodiment of the present invention; Figure 10 This is a partial structural diagram of a transformer oil filling device according to a preferred embodiment of the present invention; Figure 11 This is a schematic diagram of a cleaning plate structure according to a preferred embodiment of the present invention; Figure 12 This is a partial cross-sectional schematic diagram of a transformer oil filling device according to a preferred embodiment of the present invention.

[0021] In the diagram: 1. Transport vehicle body; 2. First tank; 3. Second tank; 4. Connecting pipe; 5. Mounting plate; 6. Quantitative adjustment mechanism; 61. Drive rod; 621. Drive motor; 6221. Lead screw; 6222. Guide column; 623. Bracket; 63. Drive disc; 64. Valve assembly; 641. Valve disc; 642. Valve stem; 6431. Sleeve; 6432. Pressure plate; 6433. Top rod; 6434. End cap; 6435. Compression spring; 644. Handle; 645. Flow port; 65. Through hole; 66. Receiving cavity; 7. Stirring mechanism. 71. Stirring shaft; 72. Stirring paddle; 73. Transmission gear; 74. Rack; 75. Mounting bracket; 8. Horizontal drive mechanism; 81. Drive source; 82. Motor frame; 83. Cam; 84. Fixing plate; 85. Return spring; 86. Guide rod; 87. Base; 88. Roller; 89. Fixing seat; 9. Cleaning mechanism; 91. Driven gear; 92. Transmission rod; 93. Cleaning plate; 94. Fixing column; 95. Cleaning section; 10. Caster wheel; 11. Hole; 12. Oil outlet pipe; 13. Observation window; 14. Push rod; 15. Heating element. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example: A transformer oil filling device, such as Figure 1-3 and Figure 12 As shown, the system includes a transport vehicle body 1, a first tank 2, a second tank 3, and a connecting pipe 4. The transport vehicle body 1 serves as the foundation for the equipment and is equipped with casters 10 with brakes at the bottom. This facilitates movement of the equipment within substations, power plants, and other locations, adapting to the transformer refueling needs of different locations. The brakes also secure the equipment in a designated position, preventing displacement during refueling. A push rod 14 is fixed to one side of the transport vehicle body 1 to facilitate its movement. Both the first tank 2 and the second tank 3 are located on the transport vehicle body 1. The first tank 2 stores transformer oil, while the second tank 3 contains a heating element 15 for heating the transformer oil. The connecting pipe 4 connects the first tank 2 and the second tank 3, and a control valve (not shown in the figure) is installed on the connecting pipe 4. The first tank 2 is equipped with a metering adjustment mechanism 6, used to meterly extract transformer oil from the first tank 2 and transport it to the second tank 3 via the connecting pipe 4. An oil outlet pipe 12 is located on one side of the lower part of the second tank 3.

[0024] In the above technical solution, this invention ensures that only the approximate amount of transformer oil needed is heated after quantitative heating of the transformer oil. This not only improves the heating efficiency of the device but also avoids the resource waste caused by heating all the transformer oil, thus improving energy utilization efficiency. Furthermore, by heating only the required amount of transformer oil, it avoids the consequences of repeated heating, such as accelerated chemical degradation, decreased insulation performance, and shortened equipment lifespan. It also reduces the reliance on operator experience, allowing even novices to quickly complete the oil filling operation. The quantitative adjustment mechanism 6 can approximate the required amount of oil according to the transformer model and capacity requirements, improving oil filling accuracy. Simultaneously, the dual-tank separation design achieves physical isolation between storage and heating functions. The first tank 2 focuses on oil storage, while the second tank 3 uses a built-in heating element 15 to target and heat the quantitatively delivered oil. This design avoids the energy waste caused by the overall heating of traditional equipment, heating only the oil to be used, reducing equipment energy consumption, preventing chemical degradation of unused oil due to repeated heating, and ensuring the insulation performance and service life of the transformer oil.

[0025] Preferably, the top of the transport vehicle body 1 is provided with an installation plate 5 for providing an installation platform, and the first tank body 2 and the second tank body 3 are both installed on the installation plate 5.

[0026] like Figure 1-3As shown, the first tank 2 is fixedly installed on one side of the mounting plate 5. The top of the first tank 2 is provided with a top cover, which is detachably connected to the first tank 2 so that oil can be injected through the top of the first tank 2. The top cover can prevent dust and impurities from entering the tank and contaminating the oil.

[0027] Preferably, the top cover can be directly placed on the top of the first tank body 2, or it can be connected by bolt tightening or groove fitting.

[0028] like Figure 2-5 As shown, the quantitative adjustment mechanism 6, as the core component for realizing quantitative oil extraction and delivery, includes a drive rod 61, an upper and lower drive assembly, a drive disc 63, and a valve assembly 64. The drive rod 61 is a hollow structure; its lower end is rigidly connected to the center of the top surface of the drive disc 63 by welding or bolting, and its upper end extends through the top of the first tank 2 and beyond the tank, connecting to the upper and lower drive assembly. The drive disc 63 is located inside the first tank 2 and serves to divide the first tank 2 into upper and lower chambers. The drive disc 63 is sealed and slidably disposed within the first tank 2. The drive rod 61 is vertically positioned with its lower end fixed to the drive disc 63 and its upper end extending out of the first tank 2. Both the first tank 2 and the second tank 3 are vertical cylindrical. The central axis of the drive rod 61 coincides with the central axis of the first tank 2 to ensure that when the drive rod 61 drives the drive disc 63 to slide, the drive disc 63 always remains coaxially aligned with the inner wall of the first tank 2, avoiding sealing failure or sliding jamming due to eccentricity. The up-and-down drive assembly drives the drive disc 63 to move up and down within the first tank 2, injecting transformer oil located in the lower chamber of the first tank 2 into the second tank 3 through the connecting pipe 4. The drive disc 63 has a through hole 65 for the transformer oil to enter the lower chamber of the first tank 2 from the upper chamber, and a valve assembly 64 is used to open and close the through hole 65. As the drive disc 63 slides up and down with the drive rod 61, it changes the volume of the lower chamber of the first tank 2: when sliding upwards, the volume of the lower chamber increases, and oil from the upper chamber of the first tank 2 flows into the lower chamber through the through hole 65; when sliding downwards, the volume of the lower chamber decreases, and the oil is pressurized and forced into the second tank 3 through the connecting pipe 4.

[0029] Preferably, the drive disk 63 is a circular metal disk adapted to the inner diameter of the first tank 2, and an oil-resistant nitrile rubber elastic sealing ring (not shown in the figure) is fitted around its outer periphery. The outer diameter of the sealing ring is slightly larger than the inner diameter of the first tank 2. Through an interference fit, the drive disk 63 and the inner wall of the first tank 2 achieve a sliding seal, dividing the interior of the first tank 2 into two independent chambers. Transformer oil enters through the top of the first tank 2 and flows into the lower chamber of the first tank 2 through the through hole 65 on the drive disk 63. In the non-working state or in the state of waiting for quantitative injection, the drive disk 63 is usually positioned above the oil level. This normal position design ensures that a sufficient amount of transformer oil is stored in the lower chamber of the first tank 2, and avoids the drive disk 63 being immersed in oil for a long time, which would cause the sealing ring to age and extend the service life of the seal. At the same time, the drive disk 63 being positioned above the oil level also provides sufficient space for volume adjustment during the quantitative extraction stage, ensuring that different volumes of oil can be extracted.

[0030] like Figure 2-8 As shown, the valve assembly 64 includes a valve disc 641, a valve stem 642, and an elastic clamping element. The drive disc 63 is hollow, with an internal receiving cavity 66. The valve disc 641 is a circular metal disc adapted to the receiving cavity 66 of the drive disc 63, and is rotatably housed within the receiving cavity 66 around its central axis. The valve disc 641 has a flow port 645 corresponding to the through hole 65 of the drive disc 63, and the diameter of the flow port 645 should be larger than the diameter of the through hole 65. The valve stem 642 is a cylindrical rod, coaxially built into the hollow channel of the drive stem 61. Its lower end passes through the top wall of the receiving cavity 66 and is rigidly connected to the center of the top surface of the valve disc 641, while its upper end extends out of the top of the drive stem 61 and is fixed with a handle 644. By rotating handle 644, the operator can cause valve stem 642 and valve disc 641 to rotate synchronously, achieving alignment (opening of through hole 65) or misalignment (closing of through hole 65) between the flow hole and through hole 65. An elastic clamping element applies a continuous downward clamping force to valve disc 641, ensuring a tight fit between the bottom surface of valve disc 641 and the inner bottom wall of the accommodating cavity 66, achieving a seal when through hole 65 is closed.

[0031] Preferably, the elastic clamping component includes a sleeve 6431, a pressure plate 6432, a push rod 6433, an end cap 6434, and a clamping spring 6435. The sleeve 6431 is a cylindrical sleeve, coaxially sleeved on the outside of the valve stem 642 and located within the hollow channel of the drive rod 61. The sleeve 6431 slides against the inner wall of the drive rod 61 and can move axially up and down. The upper end of the sleeve 6431 is provided with a lifting portion (not shown in the figure) for upward pulling. The pressure plate 6432 is a metal plate with one end fixed to the bottom end of the sleeve 6431 and the other end extending towards the inner wall of the accommodating cavity 66. The pressure plate 6432 is located directly above the valve disc 641, and its bottom surface contacts the top surface of the valve disc 641. End cap 6434 is located directly above drive plate 63. Push rod 6433 is vertically positioned with its upper end rigidly connected to the bottom surface of end cap 6434, and its lower end passes through the top wall of drive plate 63 and abuts against the top surface of pressure plate 6432. Compression spring 6435 is sleeved on the outside of push rod 6433, with its upper end abutting against the bottom surface of end cap 6434 and its lower end abutting against the top surface of drive plate 63. Normally, it is in a compressed state, applying downward elastic pressure to pressure plate 6432 through push rod 6433, thereby causing valve plate 641 to fit tightly against the bottom wall of accommodating cavity 66, effectively preventing oil leakage from the contact surface. When rotating valve plate 641, first pull sleeve 6431 and pressure plate 6432 upward through lifting part, so that pressure plate 6432 and valve plate 641 are no longer abutting. At this time, valve rod 642 and drive plate 63 can be easily rotated through handle 644 to block or open through hole 65 of drive plate 63.

[0032] Preferably, multiple pressure plates 6432 are provided, and the multiple pressure plates 6432 are evenly distributed along the circumferential direction of the drive rod 61. Each pressure plate 6432 has a corresponding top rod 6433, end cap 6434 and compression spring 6435, so that the bottom surface of the valve disc 641 is tightly fitted with the inner bottom wall of the accommodating cavity 66, thereby improving the sealing effect.

[0033] Preferably, the outer wall of the drive rod 61 is provided with scale lines (marking lines indicating volume or displacement) that gradually increase from high to low along the axial direction. The scale values ​​of the scale lines are linearly related to the volume of the quantitative pushing chamber (the chamber below the first tank 2) (e.g., each 1cm scale interval corresponds to 1L of volume, or is calculated and set according to the inner diameter of the first tank 2). These scale lines provide the operator with an intuitive quantitative reference.

[0034] Preferably, one end of the connecting pipe 4 is connected to the lower side wall of the lower chamber of the first tank 2, and the other end is connected to the lower side wall of the second tank 3. A control valve is used to control the opening and closing of the connecting pipe 4 and prevent the heated oil in the second tank 3 from flowing back into the first tank 2. Specifically, the control valve can be a spring-loaded pressure valve, a check valve, a solenoid valve, or a manual shut-off valve. When a spring-loaded pressure valve is selected, its opening pressure is matched to the oil pressure generated by the drive disc 63 squeezing the lower chamber of the first tank 2—when the drive disc 63 descends and squeezes the oil, and the pressure in the chamber reaches the opening pressure of the pressure valve, the control valve automatically opens, and the oil flows into the second tank 3; after the pushing is completed, the pressure in the chamber drops, and the pressure valve automatically closes under the action of the spring. This achieves automatic oil delivery control and reliably prevents the oil from flowing back into the second tank 3, while eliminating the need for additional electrical control components and reducing equipment failure rate.

[0035] like Figure 1-3 As shown, the up-down drive assembly includes a drive motor 621, a lead screw 6221 mechanism driven by the drive motor 621, and a bracket 623 connected to the output end of the lead screw 6221 mechanism. The lead screw 6221 mechanism includes a lead screw 6221 and a guide column 6222. The drive motor 621 is mounted on the mounting plate 5 and is used to drive the lead screw 6221 to rotate. Both the lead screw 6221 and the guide column 6222 are vertically arranged and pass through the bracket 623. The bracket 623 is threadedly engaged with the lead screw 6221, and the bracket 623 is fixed to the push rod 14.

[0036] Preferably, the lower end of the lead screw 6221 is connected to the output shaft of the drive motor 621, and the upper end extends upward. The lead screw 6221 and the guide post 6222 are located on opposite sides of the first tank body 2. The bracket 623 can move up and down along the guide post 6222, and the push rod passes through the bracket 623 and the bracket 623 is fixedly connected.

[0037] In the above technical solution, during quantitative delivery, the operator first observes the oil level of the transformer to be injected through the transformer oil indicator (oil level gauge / oil level window), and determines the volume of oil to be delivered based on the transformer's rated capacity and maintenance experience. The drive motor 621 of the upper and lower drive assembly is then started, causing the lead screw 6221 to rotate. At this time, the bracket 623 moves upward along the lead screw 6221, driving the drive rod 61 and drive disc 63 to move upward synchronously until the required scale line on the outer wall of the drive rod 61 is flush with the top surface of the first tank 2, thus injecting the required amount of transformer oil into the second tank 3.

[0038] It should be noted that the quantity of transformer oil does not require high-precision control in practical applications. Therefore, the "quantitative" value in this invention is an approximate value, which should not differ significantly from the actual filling requirements. Thus, the scale values ​​are only used as a reference for approximate volume and do not require strict precise calculation. Their core function is to provide operators with a "general range guide" rather than a "precise measurement standard," adapting to actual needs.

[0039] like Figure 1 , 2 As shown in Figures 9-12, the second tank 3 is equipped with a stirring mechanism 7 and a horizontal drive mechanism 8. The horizontal drive mechanism 8 drives the second tank 3 to move back and forth on the transport vehicle 1, and also drives the stirring mechanism 7 to stir the transformer oil inside the second tank 3. During its movement, the horizontal drive mechanism 8 can indirectly provide power to the stirring mechanism 7, eliminating the need for an additional power source for stirring and simplifying the equipment structure. The stirring mechanism 7 stirs the transformer oil inside the second tank 3 to ensure uniform heating of the transformer oil and improve heating efficiency.

[0040] Preferably, the horizontal drive mechanism 8 includes a drive source 81, a motor frame 82, a cam 83, a fixed plate 84, a return spring 85, a guide rod 86, a base 87, and rollers 88. The base 87 is fixed to the second tank 3 and can slide back and forth on the mounting plate 5. The rollers 88 are installed on opposite sides of the base 87. Specifically, the mounting plate 5 has holes 11, and each opposite side of the holes 11 has a groove for accommodating the rollers 88. The rollers 88 can slide freely along the grooves, ensuring that the second tank 3 can move stably back and forth with the base 87 without deviation or jamming. The base 87 is located inside the holes 11, and the second tank 3 is located above the holes 11. The drive source 81 is preferably a motor, which is mounted on the bottom of the mounting plate 5 via the motor frame 82. The drive source 81 is used to drive the cam 83 to rotate. The cam 83 is an eccentric disc structure, which is fixed to the output shaft of the drive source 81 by a key connection and rotates synchronously with the output shaft. Cam 83 is used to push fixed plate 84 to move towards compression return spring 85. Return spring 85 is sleeved on guide rod 86 and is used to provide return elastic force to fixed plate 84, so that cam 83 periodically pushes fixed plate 84 to move against the force of return spring 85 when rotating.

[0041] More preferably, the cam 83, the fixing plate 84, the return spring 85, and the guide rod 86 are all located at the bottom of the mounting plate 5. The outer periphery of the cam 83 is tangent to the surface of the fixing plate 84. The surface of the fixing plate 84 that contacts the cam 83 is curved. The fixing plate 84 is located below the hole 11. Two guide rods 86 are provided, parallel and symmetrically distributed on both sides of the hole 11. A fixing seat 89 is fixed to the end of the guide rod 86, and the fixing seat 89 is fixed to the bottom of the mounting plate 5. The guide rod 86 passes through the fixing plate 84 to ensure that the fixing plate 84 can slide along the guide rod 86. The return spring 85 is sleeved on the outside of the guide rod 86, with one end fixed to the fixing seat 89 and the other end fixed to the fixing plate 84. It is in a naturally extended state under normal conditions.

[0042] In the above technical solution, the drive source 81 drives the cam 83 to rotate. When the eccentric end of the cam 83 rotates to contact the fixed plate 84, as the cam 83 continues to rotate, the eccentric end applies a horizontal thrust to the fixed plate 84, pushing the fixed plate 84 to move away from the drive source 81 along the guide rod 86, while simultaneously compressing the return spring 85. The base 87 connected to the fixed plate 84 synchronously drives the second tank 3 to slide along the slide groove. When the eccentric end of the cam 83 rotates to the side away from the fixed plate 84, the thrust of the cam 83 on the fixed plate 84 disappears, and the return spring 85 extends under the action of elastic force, pushing the fixed plate 84 to move towards the drive source 81 along the guide rod 86, causing the base 87 and the second tank 3 to slide in opposite directions, returning to the initial position. As the drive source 81 continues to operate, the cam 83 and the return spring 85 act alternately, causing the second tank 3 to move periodically back and forth on the mounting plate 5. On the one hand, this can shake the second tank 3, so that the transformer oil in the second tank 3 is heated evenly; on the other hand, it can provide a power basis for the subsequent stirring mechanism 7.

[0043] like Figure 1 , 2 As shown in Figures 9-12, the stirring mechanism 7 includes a stirring shaft 71, a stirring paddle 72, a transmission gear 73, a rack 74, and a mounting bracket 75. The stirring shaft 71 is vertically arranged inside the second tank 3, with its lower end located at the bottom of the second tank 3 and its upper end extending through the top of the second tank 3. A heating element 15 is located below the stirring shaft 71, and the heating element 15 is preferably a resistance heating rod or a ring-shaped heating wire. The stirring paddle 72 is mounted on the stirring shaft 71 and is used to stir the transformer oil in the second tank 3. The transmission gear 73 is located above the second tank 3 and fixed to the upper end of the stirring shaft 71. The rack 74 is located on one side of the transmission gear 73 and meshes with it. The rack 74 is mounted on the mounting plate 5 via the mounting bracket 75.

[0044] Preferably, the transmission gear 73 is a spur gear, which is fixed to the upper end of the stirring shaft 71 by a key connection and rotates synchronously with the stirring shaft 71; the rack 74 is a spur rack 74 adapted to the transmission gear 73, which is fixed to the mounting plate 5 of the transport vehicle body 1 by a mounting bracket 75 and maintains a meshing state with the transmission gear 73, and the mounting bracket 75 is fixed to the mounting plate 5.

[0045] In the above technical solution, when the horizontal drive mechanism 8 drives the second tank 3 to reciprocate along the slide, the transmission gear 73 fixed on the stirring shaft 71 moves synchronously with the tank. Since the rack 74 is fixed on the mounting plate 5 through the mounting bracket 75 (its position remains unchanged), the transmission gear 73 meshes with the rack 74 during the movement, converting linear movement into rotational motion. That is, when the second tank 3 moves forward, the transmission gear 73 rotates in the forward direction, and when it moves backward, the transmission gear 73 rotates in the reverse direction. The transmission gear 73 drives the stirring shaft 71 to rotate synchronously in the forward and reverse directions, and the stirring paddle 72 on the stirring shaft 71 rotates accordingly inside the second tank 3, stirring the transformer oil being heated inside the tank, thereby improving the uniformity of the oil temperature and preventing local overheating that could lead to oil deterioration.

[0046] like Figure 1 , 2 As shown in Figures 9-12, the second tank 3 is equipped with a transparent observation window 13 and a cleaning mechanism 9. The observation window 13 is located on the side wall of the second tank 3 and is used by the operator to observe the oil volume, heating status, and stirring status inside the tank. To prevent dust or oil stains from accumulating on the outside of the observation window 13 and obstructing the view, a cleaning mechanism 9 is provided on the outside of the second tank 3 to remove impurities from the outside of the observation window 13.

[0047] Preferably, the observation window 13 is rectangular and embedded in the side wall of the second tank 3. The observation window 13 is made of high-temperature resistant tempered glass, and the glass is sealed to the side wall of the tank by an oil-resistant rubber sealing ring to prevent oil leakage. The position of the observation window 13 corresponds to the middle area of ​​the second tank 3 to ensure that the overall state of the oil in the tank can be clearly observed.

[0048] Preferably, the cleaning mechanism 9 includes a driven gear 91, a transmission rod 92, a cleaning plate 93, and a fixed column 94. The driven gear 91 is a spur gear, which meshes with the transmission gear 73 and drives the transmission rod 92 to rotate. The transmission rod 92 is a stainless steel threaded rod, vertically arranged on one side of the second tank body 3, with its upper end coaxially fixed to the driven gear 91 and rotating synchronously with it, and its lower end fixed to the outer wall of the second tank body 3. The fixed column 94 is a smooth stainless steel column, parallel to the transmission rod 92 and located on opposite sides of the second tank body 3, with both ends of the fixed column 94 fixed to the side wall of the second tank body 3.

[0049] Preferably, the cleaning plate 93 is an arc-shaped plastic plate, with its surface conforming to the outer side of the observation window 13. Both the transmission rod 92 and the fixing post 94 pass through the cleaning plate 93, and the cleaning plate 93 and the transmission rod 92 are threaded together. A cleaning part 95 made of sponge or soft cloth is attached to the side of the cleaning plate 93 facing the observation window 13. The cleaning part 95 is in close contact with the glass of the observation window 13 and is used to wipe the observation window 13.

[0050] In the above technical solution, when the transmission gear 73 rotates, the driven gear 91 meshing with the transmission gear 73 rotates synchronously, thereby driving the transmission rod 92 to rotate. Since the cleaning plate 93 and the transmission rod 92 are threadedly engaged, the rotational motion of the transmission rod 92 is converted into the up-and-down linear motion of the cleaning plate 93 through the threaded engagement. When the cleaning plate 93 moves up and down, its cleaning part 95 simultaneously wipes the outside of the observation window 13, removing dust, oil, and other impurities, ensuring that the observation window 13 is always clear and does not require manual cleaning by the operator.

[0051] These are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A transformer oil filling device, characterized in that: include: Transport vehicle body; The first tank, located on the transport vehicle, is used to store transformer oil; The second tank is located on the transport vehicle body and is equipped with a heating element inside for heating the transformer oil; A connecting pipe connects the first tank and the second tank; The first tank is equipped with a quantitative adjustment mechanism for quantitatively extracting transformer oil from the first tank and transporting it to the second tank through the connecting pipe.

2. The transformer oil filling device according to claim 1, characterized in that: The quantitative adjustment mechanism includes a drive rod, an upper and lower drive assembly, a drive disc, and a valve assembly; The drive disc is located inside the first tank and is used to divide the first tank into upper and lower chambers. The lower end of the drive rod is fixed to the drive disc, and the upper end extends out of the first tank. The up-and-down drive assembly is used to drive the drive disc to move up and down in the first tank to inject the transformer oil located in the lower chamber of the first tank into the second tank. The drive disc has a through hole for transformer oil to enter the lower chamber of the first tank from the upper chamber, and the valve assembly is used to open and close the through hole.

3. The transformer oil filling device according to claim 2, characterized in that: The valve assembly includes a valve disc, a valve stem, and a resilient clamping element; The valve disc is rotatably housed within the drive disc. The valve disc has a flow hole corresponding to the through hole. The valve stem is built into the drive rod and connected to the valve disc, and is used to drive the valve disc to rotate so that the flow hole is aligned or misaligned with the through hole. The elastic clamping element is used to apply a clamping force toward the inner wall of the drive disc to achieve a seal.

4. The transformer oil filling device according to claim 3, characterized in that: The elastic clamping component includes a sleeve, a pressure plate, a top rod, an end cap, and a clamping spring; The sleeve is located inside the drive rod and sleeved outside the valve rod. The sleeve is slidably engaged with the drive rod. The pressure plate is fixed to the bottom end of the sleeve and located above the valve disc. The end cap is located above the drive plate, the upper end of the push rod is fixed to the end cap, and the lower end passes through the top wall of the drive plate and abuts against the pressure plate. The compression spring is sleeved on the outside of the top rod, and its two ends abut against the end cover and the top surface of the drive plate, respectively.

5. A transformer oil filling device according to claim 2, characterized in that: The outer wall of the drive rod is provided with scale lines that gradually increase from high to low; The connecting pipe is connected to the lower chamber of the first tank, and a control valve is installed on the connecting pipe.

6. The transformer oil filling device according to claim 2, characterized in that: The up-down drive assembly includes a drive motor, a lead screw mechanism driven by the drive motor, and a bracket connected to the output end of the lead screw mechanism. The bracket is fixedly connected to the drive rod.

7. The transformer oil filling device according to claim 1, characterized in that: The second tank is equipped with a stirring mechanism and a horizontal drive mechanism; The horizontal drive mechanism is used to drive the second tank to move back and forth on the transport vehicle body, and to drive the stirring mechanism to stir the transformer oil in the second tank.

8. The transformer oil filling device according to claim 7, characterized in that: The horizontal drive mechanism includes a drive source, a cam, a fixed plate, a return spring, a guide rod, and a base; The transport vehicle body is equipped with an mounting plate, and the first tank and the second tank are both mounted on the mounting plate. The base is fixed to the second tank and can slide back and forth on the mounting plate. The drive source is used to drive the cam to rotate, the cam is used to push the fixed plate to move in the direction of compressing the return spring, the return spring is sleeved on the guide rod and is used to provide a return elastic force to the fixed plate, so that the cam periodically pushes the fixed plate to move against the force of the return spring when rotating; The guide rod passes through the fixed plate, and the base is fixed to the fixed plate.

9. A transformer oil filling device according to claim 8, characterized in that: The stirring mechanism includes a stirring shaft, a stirring paddle, a transmission gear, a rack, and a mounting frame; The stirring shaft is located inside the second tank, the stirring paddle is mounted on the stirring shaft and used to stir the transformer oil inside the second tank, the transmission gear is located above the second tank and fixed to the upper end of the stirring shaft, the rack is located on one side of the transmission gear and meshes with it, and the rack is mounted on the mounting plate through the mounting bracket.

10. A transformer oil filling device according to claim 9, characterized in that: The second tank is provided with a transparent observation window and a cleaning mechanism, the cleaning mechanism being used to remove impurities from the outside of the observation window; The cleaning mechanism includes a driven gear, a transmission rod, a cleaning plate, and a fixed column. The driven gear meshes with the transmission gear and is used to drive the transmission rod to rotate. The transmission rod and the fixed column are both vertically arranged and pass through the cleaning plate. The cleaning plate and the transmission rod are threaded together. The cleaning plate is equipped with a cleaning section for wiping the observation window.

Images