A transformer oil level gauge debugging device and a debugging system

Abstract

The utility model relates to transformer oil level calibration technical field, concretely relates to a transformer oil level gauge debugging device and debugging system, and the debugging device includes the support, still includes the sensing component, elevating gear and measuring device of installation in the support, the sensing component includes flange, connecting plate and connecting rod, the flange fixed mounting is in the top of support, the connecting plate is located in one side of flange and is rotatably connected between flange, the connecting rod is located in the side of connecting plate away from flange and is fixedly connected with connecting plate, the elevating gear is located in the bottom of connecting rod for driving the connecting rod rotation, the measuring device is located in one side of elevating gear for measuring the displacement of elevating gear. Its purpose lies in, solves the technical problem that oil-immersed transformer oil level calibration device structure is complex, is inconvenient for the maintenance field use.

Description

Technical Field

[0001] This utility model relates to the field of transformer oil level calibration technology, specifically to a transformer oil level gauge debugging device and debugging system. Background Technology

[0002] Oil level gauges are crucial monitoring devices installed in the oil conservator of oil-immersed transformers. Their function is to provide real-time feedback on the level of insulating oil within the tank. This is a key basis for maintenance personnel to determine whether the transformer's insulation performance and heat dissipation efficiency meet standards and to prevent equipment failures, playing a vital role in ensuring the long-term stable operation of the transformer. To ensure that the oil level gauge accurately reflects the correlation between oil level and temperature after long-term operation, it needs to be calibrated and adjusted regularly to ensure accurate display and conformity to the oil level-temperature correlation curve. Currently, the mainstream calibration method in the industry uses calibration devices based on the principle of liquid displacement. These devices typically consist of a transparent calibration tank, a liquid circulation system, and a temperature control module. By injecting or draining oil into the calibration tank, changes in the oil level inside the transformer are simulated, thereby testing the indication error and response characteristics of the oil level gauge. This method can achieve high calibration accuracy in a controlled laboratory environment.

[0003] However, this verification method, which relies on realistic fluid simulation, requires the integration of numerous components such as liquid storage containers, circulation pipelines, and temperature control equipment, resulting in a complex, bulky, and costly system. These inherent structural limitations make the device lack portability, hindering its deployment to substations, power distribution rooms, and other equipment sites for on-site verification and debugging. Furthermore, the operating mode of the liquid displacement-based verification device is disconnected from actual field conditions, failing to provide maintenance personnel with a training environment that simulates real installation, disassembly, and debugging procedures. This makes it difficult to meet the needs for on-site skills training and precise adjustment of oil level gauges. Utility Model Content

[0004] To address the technical problem that oil level calibration devices for oil-immersed transformers are complex in structure and inconvenient for on-site maintenance, this utility model provides a transformer oil level gauge debugging device and debugging system. The specific technical solution adopted is as follows: The first aspect of the present invention provides a transformer oil level gauge debugging device, including a bracket, and further including a sensing component, a lifting device and a measuring device installed on the bracket; The sensing assembly includes a flange, a connecting plate, and a connecting rod. The flange is fixedly installed on the top of the bracket. The connecting plate is located on one side of the flange and is rotatably connected to the flange. The connecting rod is located on the side of the connecting plate away from the flange and is fixedly connected to the connecting plate. The lifting device is located at the bottom of the connecting rod and is used to drive the connecting rod to rotate; The measuring device is located on one side of the lifting device and is used to measure the displacement of the lifting device.

[0005] Furthermore, the connecting plate and the connecting rod are fixedly connected by bolts, and the end of the bolt away from the connecting rod passes through a through hole in the flange and is slidably connected to the flange.

[0006] Furthermore, the side of the connecting plate away from the connecting rod is rotatably connected to the flange via a rotating shaft.

[0007] Furthermore, the lifting device includes a screw and a nut, the screw is located at the bottom of the connecting rod, and the nut is sleeved on the screw with one side of the nut fixedly connected to the bracket.

[0008] Furthermore, the measuring device is a scale plate, which is mounted on a bracket, and the scale lines of the scale plate are matched with the lifting direction of the lifting device.

[0009] Furthermore, the bracket is a hollow trapezoidal frame structure, and the top of the bracket is provided with an installation platform for installing flanges.

[0010] Furthermore, it also includes a display component fixedly installed on the bracket, the display component being connected to the sensing component via a transmission device, and used to display the amount of change in the linkage of the sensing component.

[0011] The second aspect of this utility model provides a transformer oil level gauge debugging system, including the transformer oil level gauge debugging device and oil level gauge described in the first aspect of this utility model. The oil level gauge is installed on the flange, and the float transmission component inside the oil level gauge abuts and matches with the connecting rod of the sensing component.

[0012] This utility model has the following beneficial effects: This utility model provides a transformer oil level gauge debugging device. A bracket serves as the basic support carrier, and the flange of the sensing component acts as the installation interface for the oil level gauge. The rotating connection between the connecting plate and the flange provides a pivot point for the connecting rod. A lifting device drives the connecting rod to rotate, which in turn actuates the float transmission component of the oil level gauge, simulating oil level changes. A measuring device collects the displacement of the lifting device, and by combining the measured data with an actual oil level comparison function, the displacement is converted into the actual oil level value. By comparing the actual oil level value with the oil level gauge display value, accurate calibration of the oil level gauge can be completed. Simultaneously, the bracket simulates on-site working conditions, supporting practical training in oil level gauge installation, disassembly, and oil level adjustment. It allows for self-calibration and periodic calibration of spare oil level gauges. This transformer oil level gauge debugging device eliminates the need for a hydraulic displacement method-based liquid circulation system and temperature control module, resulting in a simple device composition and no waste oil generation. It allows for direct self-calibration of spare oil level gauges, avoiding rework issues caused by discovering faults after installation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions and advantages 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a transformer oil level gauge debugging device provided in one embodiment of the present invention; Figure 2 This is a top view of a transformer oil level gauge debugging device provided in one embodiment of the present invention; Figure 3 This is a left view of a transformer oil level gauge debugging device provided in one embodiment of the present invention; Icons: 1-Bracket, 2-Flange, 3-Connecting plate, 4-Linkage rod, 5-Bolt, 6-Screw, 7-Mounting platform, 8-Display component. Detailed Implementation

[0015] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention.

[0016] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. It should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Please see Figures 1 to 3The present invention provides several structural schematic diagrams of a transformer oil level gauge debugging device according to an embodiment. The device includes a support 1, a sensing component, a lifting device, and a measuring device mounted on the support 1. The sensing component includes a flange 2, a connecting plate 3, and a connecting rod 4. The flange 2 is fixedly mounted on the top of the support 1. The connecting plate 3 is located on one side of the flange 2 and rotatably connected to it. The connecting rod 4 is located on the side of the connecting plate 3 away from the flange 2 and is fixedly connected to it. The lifting device is located at the bottom of the connecting rod 4 and is used to drive the connecting rod 4 to rotate. The measuring device is located on one side of the lifting device and is used to measure the displacement of the lifting device. The rotation of the connecting rod 4 driven by the lifting device simulates changes in oil level. In practical application, the oil level gauge to be calibrated is fixedly connected to the flange 2 of the sensing component of the transformer oil level gauge calibration device, so that the float transmission component inside the oil level gauge and the top of the connecting rod 4 of the sensing component form abutment and adaptation, establishing a linkage between the mechanical action of the device and the internal transmission of the oil level gauge. In a real transformer oil tank, the float rotates as the oil level rises and falls. In this embodiment, a lifting device drives the connecting rod 4 to rotate to simulate oil level changes. During the rotation of the connecting rod 4, it drives the float transmission component of the oil level gauge to move synchronously, thereby simulating the actual state of the oil level rising or falling in the transformer oil tank. Then, the displacement of the lifting device is read using a measuring device; through simple trigonometric function calculation, the displacement can be converted into the rotation angle of the connecting rod 4, thus obtaining the accurate simulated oil level value it represents. By comparing the calculated standard oil level value with the actual indicated value on the instrument panel, the operator can determine the indication error of the oil level gauge, and complete the accurate calibration of the oil level gauge by adjusting the mechanical structure inside the instrument panel. The entire process does not require the participation of real oil medium.

[0018] The transformer oil level gauge debugging device provided in this embodiment uses bracket 1 as the basic support carrier, and the flange 2 of the sensing component as the installation interface of the oil level gauge. The rotatable connection between the connecting plate 3 and the flange 2 provides a fulcrum for the connecting rod 4. The lifting device drives the connecting rod 4 to rotate, and the rotation of the connecting rod 4 drives the oil level gauge float transmission component to move, realizing the simulation of oil level change. The measuring device collects the displacement of the lifting device, and the displacement can be converted into the actual oil level value by combining the measured data with the actual oil level comparison function. By comparing the actual oil level value with the oil level gauge display value, the oil level gauge can be accurately calibrated. At the same time, the bracket 1 is used to simulate the on-site working conditions, supporting practical training on oil level gauge installation, disassembly, and oil level adjustment. It can perform self-calibration and periodic calibration of spare oil level gauges. This transformer oil level gauge debugging device does not rely on the liquid circulation system and temperature control module of the hydraulic displacement method. The equipment composition is simple and does not produce waste oil. It can directly perform self-calibration of spare oil level gauges, avoiding the rework problem of discovering faults after the oil level gauge is installed.

[0019] In some embodiments, the connecting plate 3 and the connecting rod 4 are fixedly connected by bolts 5. The end of the bolt 5 away from the connecting rod 4 passes through a through hole opened on the flange 2 and is slidably connected to the flange 2. First, according to the size of the connection surface between the connecting plate 3 and the connecting rod 4, at least two bolts 5 are selected and spaced apart circumferentially along the connection surface. After the bolts 5 pass through the preset mounting holes of the connecting rod 4, they are screwed into the corresponding threaded holes on the connecting plate 3 to form a fixed structure between the connecting plate 3 and the connecting rod 4. Then, on the side of the flange 2 facing the connecting plate 3, through holes matching the number of bolts 5 are opened radially along the flange 2. The length of the through holes needs to cover the maximum displacement trajectory of the bolts 5 when the connecting rod 4 rotates. The end of the bolt 5 away from the connecting rod 4 passes through the through hole. When the connecting rod 4 rotates around the rotation fulcrum of the connecting plate 3 and the flange 2, the bolt 5 will slide along the radial direction of the through hole with the swing of the connecting rod 4. This provides sufficient space for the rotation of the connecting rod 4 and limits the bolt 5 through the through hole, preventing lateral displacement during the rotation of the connecting rod 4 and ensuring the stability of the transmission of the sensing component.

[0020] In some embodiments, the side of the connecting plate 3 away from the connecting rod 4 is rotatably connected to the flange 2 via a rotating shaft. When the lifting device drives the connecting rod 4 to be subjected to force, the connecting rod 4 will drive the connecting plate 3 to rotate around the axis of the rotating shaft. The rotating shaft can be supported by a bushing to reduce radial runout during rotation, ensuring smooth rotation and coaxiality between the connecting plate 3 and the flange 2, and avoiding the impact of rotation jamming or offset on the accuracy of oil level simulation.

[0021] In some embodiments, the lifting device includes a screw 6 and a nut (not shown in the figure). The screw 6 is located at the bottom of the connecting rod 4, and the nut is sleeved on the screw 6 with one side of the nut fixedly connected to the bracket 1. A pre-set connection point is fixed between the top of the screw 6 and the bottom of the connecting rod 4. A mounting base with mounting holes is fixed on the side of the bracket 1 at a position corresponding to the screw 6. A nut matching the thread parameters of the screw 6 is selected, and the nut is embedded into the mounting hole of the mounting base and fixed thereto. When it is necessary to drive the connecting rod 4 to rotate, the screw 6 is manually rotated. Since the nut remains stationary, the screw 6 will rise and fall along the axial direction of the nut. The rising and falling screw 6 will push or pull down the bottom of the connecting rod 4, thereby driving the connecting rod 4 to rotate, thus simulating oil level changes.

[0022] In some embodiments, the motor can be fixed to the side of the bracket 1, with the motor output shaft axis parallel to the screw 6 axis or the direction changed by a transmission assembly; the motor output end is connected to the screw 6 by a coupling or gear transmission assembly. If the motor output shaft is perpendicular to the screw 6 axis, a bevel gear transmission can be used to achieve the direction change; then a control unit, such as a controller with forward and reverse buttons, is configured and electrically connected to the motor. When electric lifting is required, the control unit starts the motor to rotate forward or reverse, and the motor output torque is transmitted to the screw 6 through the transmission assembly, driving the screw 6 to rise and fall along the nut axis, thereby realizing the automatic rotation of the connecting rod 4; In some embodiments, the measuring device is a scale plate, which is mounted on the bracket 1. The scale lines of the scale plate are matched with the lifting direction of the lifting device. The scale plate is mounted on one side of the lifting device and is preferably composed of a millimeter-level scale plate with a length of 25cm. The distance of the lifting device rising or falling is read from the measuring scale, and then the actual change in oil level and the actual oil level are calculated by trigonometric functions. Then, the oil level is precisely adjusted by adjusting the indication of the oil level gauge.

[0023] In some embodiments, the measuring device may also employ an automatic ranging device to automatically measure position changes. The automatic ranging device, such as a laser displacement sensor or a linear displacement sensor, is fixed on the bracket 1 at the position corresponding to the lifting device, ensuring that the detection direction of the ranging device is parallel to the lifting direction of the lifting device. The automatic ranging device is connected to an external data processing unit, such as a microcontroller (PLC), via wires. The measurement range and accuracy parameters of the ranging device are preset to match the measurement range required for oil level adjustment. During oil level simulation and verification, the automatic ranging device detects the displacement changes of the moving parts of the lifting device in real time, converting the displacement data into electrical signals and transmitting them to the data processing unit. The data processing unit automatically calculates the actual change in oil level and the actual oil level according to a preset trigonometric function algorithm, and can display the calculation results in real time on the corresponding display module. Maintenance personnel adjust the lifting device and oil level gauge indication based on this real-time data, eliminating the need for manual reading and calculation.

[0024] In some embodiments, the bracket 1 is a hollow trapezoidal frame structure, and the top of the bracket 1 is provided with a mounting platform 7 for mounting the flange 2. This embodiment has a simple and clear structure, suitable for oil level gauge calibration work in a real working environment. The bracket 1 can be configured to be at the same height as the oil level gauge installation position on site from the operator's standing reference plane, simulating the actual operating conditions and realizing a realistic operating environment. The mounting platform 7 has connection holes that correspond one-to-one with the fixing holes distributed circumferentially on the flange 2 of the sensing component. Placing the flange 2 on the mounting platform 7, aligning the fixing holes of the flange 2 with the connection holes of the mounting platform 7, allows for stable fixing of the flange 2 and the bracket 1.

[0025] In some embodiments, a display component 8 is further included, which is fixedly mounted on the bracket 1. The display component 8 is connected to the sensing component via a transmission device and is used to display the change in the connecting rod 4 of the sensing component. Specifically, the transmission device is preferably a hydraulic system, which transmits the movement of the connecting plate 3 on the flange 2 of the sensing component to the display component 8 for indication through a bellows and connecting pipe, thereby displaying the change in oil level. Through the cooperation of the display component 8 and the hydraulic transmission device, a visual indication of the change in the connecting rod 4 is achieved.

[0026] In some embodiments, the display component 8, such as an analog dial digital display screen, is fixedly installed at a preset position on the bracket 1. The transmission device adopts a hydraulic system. The input end of the hydraulic system is connected to the connecting plate 3 of the sensing component, and the output end is connected to the input shaft of the display component 8. One end of two pairs of bellows is fixed on the outer wall of the connecting plate 3. The two pairs of bellows correspond to the two sides of the rotation direction of the connecting plate 3, respectively, to ensure that the bellows can be driven to move when the connecting plate 3 rotates in both directions. The other end of the bellows is sealed to one end of the connecting pipe. The other end of the connecting pipe is connected to the input end of the hydraulic cylinder of the hydraulic system. The output end of the hydraulic cylinder of the hydraulic system is fixedly connected to the input shaft of the display component 8 through a transmission rod. When the lifting device drives the connecting rod 4 to rotate, the connecting rod 4 drives the connecting plate 3 to rotate around the flange 2. The rotation of the connecting plate 3 will squeeze or stretch the corresponding bellows, allowing the hydraulic oil inside the bellows to enter the hydraulic cylinder of the hydraulic system through the connecting pipe. The pressure change of the hydraulic oil in the hydraulic cylinder drives the piston to move, and the piston drives the transmission rod to move, which in turn drives the input shaft of the display component 8 to rotate, causing the pointer or number of the display component 8 to change. This converts the rotation change of the connecting rod 4 into an intuitive oil level change indication, realizing real-time display of oil level changes. This allows maintenance personnel to intuitively grasp the oil level adjustment situation and improve the efficiency and accuracy of oil level verification.

[0027] The second aspect of this utility model provides a transformer oil level gauge debugging system, including the transformer oil level gauge debugging device and oil level gauge described in the first aspect of this utility model. The oil level gauge is installed on the flange 2, and the float transmission component inside the oil level gauge abuts and matches with the connecting rod 4 of the sensing component. First, place the oil level gauge directly above the flange 2 of the sensing component of the debugging device, ensuring that the connection holes of the oil level gauge and the flange 2 of the sensing component correspond one-to-one, thus completing the fixed installation of the oil level gauge on the debugging device. After fixing the oil level gauge, check the extension position of the float drive component inside the oil level gauge: if the bottom end of the float drive component does not contact the top end of the connecting rod 4 of the sensing component, the installation height of the oil level gauge needs to be finely adjusted to ensure that the bottom end of the float drive component and the top end of the connecting rod 4 form a tight and gapless contact. Operate the lifting device of the debugging device to raise and lower it vertically. The top end of the lifting device pushes or pulls down the connecting rod 4 of the sensing component, causing the connecting rod 4 to rotate around the rotating connection between the connecting plate 3 and the flange 2. When the connecting rod 4 rotates, its top end synchronously pushes the float drive component inside the oil level gauge, causing the float drive component to move up and down with the change of the angle of the connecting rod 4, simulating the actual physical process of the oil level in the transformer tank rising or falling. The measuring device collects the displacement of the lifting device in real time. Based on a preset trigonometric function relationship, the displacement is substituted into the calculation to obtain the actual change in oil level and the current actual oil level value. Maintenance personnel compare the oil level value displayed by the oil level gauge with the calculated actual oil level value. If there is a discrepancy, the displacement of the lifting device is finely adjusted, the rotation angle of connecting rod 4 is adjusted, and the position of the float transmission component is changed. The change in the oil level gauge display value is observed simultaneously. This fine-tuning is repeated until the oil level gauge display value is completely consistent with the actual oil level value, thus completing the accurate calibration of the oil level gauge.

[0028] This transformer oil level gauge commissioning system achieves integrated operation from installation and adaptation to calibration and verification of the oil level gauge through the collaboration of the oil level gauge and the commissioning device. This avoids the rework problem of discovering faults only after the oil level gauge has been installed on the transformer, and also reduces the damage or accuracy reduction caused by frequent transportation and verification of spare oil level gauges. The system can simulate actual on-site working conditions, enabling maintenance personnel to complete practical training in oil level gauge installation, disassembly and accurate calibration in a safe and controllable environment, thereby improving their on-site operation proficiency. In addition to the above description, the following points need to be noted: (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design. (2) The oil level gauge in this disclosure is a mature and conventional technology in the prior art. Anyone skilled in the art can realize the application of this utility model based on the principle of the same function in the prior art. The oil level gauge itself is not the innovation point of this utility model. (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A transformer oil level gauge debugging device, comprising a bracket, characterized in that, It also includes sensing components, lifting devices, and measuring devices mounted on the bracket; The sensing assembly includes a flange, a connecting plate, and a connecting rod. The flange is fixedly installed on the top of the bracket. The connecting plate is located on one side of the flange and is rotatably connected to the flange. The connecting rod is located on the side of the connecting plate away from the flange and is fixedly connected to the connecting plate. The lifting device is located at the bottom of the connecting rod and is used to drive the connecting rod to rotate; The measuring device is located on one side of the lifting device and is used to measure the displacement of the lifting device.

2. The transformer oil level gauge debugging device according to claim 1, characterized in that, The connecting plate and the connecting rod are fixedly connected by bolts. The end of the bolt away from the connecting rod passes through a through hole in the flange and is slidably connected to the flange.

3. The transformer oil level gauge debugging device according to claim 2, characterized in that, The side of the connecting plate away from the connecting rod is rotatably connected to the flange via a rotating shaft.

4. The transformer oil level gauge debugging device according to claim 1, characterized in that, The lifting device includes a screw and a nut. The screw is located at the bottom of the connecting rod, and the nut is sleeved on the screw with one side of the nut fixedly connected to the bracket.

5. The transformer oil level gauge debugging device according to claim 1, characterized in that, The measuring device is a scale plate, which is mounted on a bracket, and the scale lines of the scale plate are matched with the lifting direction of the lifting device.

6. The transformer oil level gauge debugging device according to claim 1, characterized in that, The bracket is a hollow trapezoidal frame structure, and the top of the bracket is provided with an installation platform for installing flanges.

7. The transformer oil level gauge debugging device according to any one of claims 1 to 6, characterized in that, It also includes a display component fixedly installed on the bracket, which is connected to the sensing component via a transmission device and is used to display the amount of change in the linkage of the sensing component.

8. A transformer oil level gauge debugging system, characterized in that, The device includes a transformer oil level gauge debugging device and an oil level gauge as described in any one of claims 1 to 7, wherein the oil level gauge is installed on the flange, and the float transmission component inside the oil level gauge abuts and matches with the connecting rod of the sensing component.

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