Measuring tool and method for aligning reverse side of power transformer pressure supporting plate
By designing lifting mechanisms and laser positioning systems that adapt to different specifications, the problem of complex operation of pressure plates for large-capacity voltage-level power transformers has been solved. This has enabled efficient and accurate alignment of the pressure plates from the reverse side, reducing waste of manpower and resources and improving work efficiency and measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-04-03
AI Technical Summary
High-capacity, high-voltage power transformers have heavy and complex pressure plates that are difficult to rotate with tools and require multiple operators, resulting in a waste of manpower, material resources, and financial resources. Furthermore, repetitive machine actions increase wear and tear.
A measuring fixture comprising an insulating base, a lifting mechanism, and a disassembly mechanism was designed. The height can be adjusted by the lifting mechanism to accommodate pressure plates of different specifications. A laser emitter and a spirit level ensure accurate positioning, a suction cup ensures stability, and a scale provides measurement basis, thus simplifying the operation process.
It improves the flexibility and operational efficiency of the equipment, reduces manpower input, avoids machine wear and tear, ensures measurement accuracy and stability, saves manpower, material resources and financial resources, and improves work efficiency.
Smart Images
Figure CN121782955A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power transformer measurement technology, specifically to a measuring tool and method for aligning the reverse side of a power transformer pressure plate. Background Technology
[0002] Transformer pressure plates are products with both front and back sides processed. The front side is processed first, and then the back side is processed. The front side is generally processed with round holes, oil channels, and slots. The back side needs to be processed to correspond to the front side. This requires accurate placement during the back side processing. If the position is misaligned, the round holes, oil channels, and slots on both sides will be misaligned, ultimately resulting in re-cutting and processing. The traditional machining method involves drilling two holes in each of the four circumferential directions (top, bottom, left, and right) of the pressure plate during the front machining process. After flipping the plate over, four center lines are drawn using these holes. A positioning point is then drilled at the top center line of the pressure plate using a machine tool drill. The drill is then moved down to find the bottom center line. If it's not on the center line, the pressure plate is rotated back and forth to position the drill on the bottom center line. After aligning the bottom, the drill is moved up again to recheck if it's still on the top center line. If not, the pressure plate is rotated again, and this process is repeated until the drill is on both the top and bottom center lines. After aligning the top and bottom, this process is repeated on the left and right sides to ensure the reverse side is correctly positioned.
[0003] This processing method requires at least three employees to work together. For a typical 180kV / 220kV product, a pressure plate weighs about 300 kilograms. The higher the capacity and voltage level of the product, the heavier the pressure plate and the more complex the structure. It is more difficult to rotate the pressure plate with tools, requiring more personnel to operate it. The repetitive actions of the machine will also increase its wear and tear, resulting in a great waste of human, material and financial resources. Summary of the Invention
[0004] The purpose of this invention is to provide a measuring fixture and method for aligning the reverse side of a power transformer pressure plate, in order to solve the problems mentioned in the background art, such as the pressure plates of products with higher capacity and larger voltage levels being heavier, more complex in structure, more difficult to rotate with tools, requiring more personnel to operate, and the repetitive actions of the machine increasing its wear and tear, resulting in a great waste of human, material and financial resources.
[0005] To achieve the above objectives, the present invention provides the following technical solution: The first aspect of the present invention provides a measuring fixture for aligning the reverse side of a pressure plate of a power transformer, including an insulating base, a central circular hole in the middle part of the insulating base, a contact surface at the upper end of the insulating base, a lifting mechanism detachably connected to the upper end of the contact surface, a fixed base fixedly connected to the upper end of the lifting mechanism, and a disassembly mechanism detachably connected to the upper end of the fixed base. The lifting mechanism includes a fixed platform, the lower end of which is in close contact with the upper end of the contact surface. An adjustment hole is provided on one side of the inner wall of the fixed platform, and a fixing hole is provided on the other side of the inner wall of the fixed platform. A movable frame one is rotatably connected to the inner wall of the fixing hole, and a movable frame two is rotatably connected to the middle of the movable frame one. A nut is fixedly connected to one side of the movable frame one, and a screw is threadedly connected to the inner wall of the nut. A rotating handle is fixedly connected to one end of the screw. The lifting platform is rotatably connected to the upper end of the movable frame two.
[0006] Preferably, the outer wall of the central circular hole is connected through the inner wall of the insulating base, and the upper end of the insulating base has a contact surface.
[0007] Preferably, one side of the inner wall of the fixed platform is connected through the outer wall of the adjustment hole, and the other side of the inner wall of the fixed platform is connected through the outer wall of the fixed hole.
[0008] Preferably, there are two sets of movable frame one and movable frame two, which are connected by a scissor-type connection and slidably connected along the adjustment hole.
[0009] Preferably, the disassembly mechanism includes a frame, the lower end of which is movably connected to the upper end of the fixed base. A suction cup is provided at the lower end of the frame, and laser emitters are provided on both sides of the upper end of the frame. An emission port is opened at one end of the two laser emitters that are close to each other. Connection holes are opened around the frame. A spirit level is fixed to one inner wall of one side of the laser emitter, and a scale is fixed to one side of the upper end of the frame.
[0010] Preferably, the lower end of the frame is fixedly connected to the upper end of the suction cup, and the two sides of the upper end of the frame are fixedly connected to the lower end of the laser emitter.
[0011] Preferably, the suction cups are provided in three sizes and connected between the frame and the fixed base, and the frame is connected to the fixed base through connecting holes.
[0012] A second aspect of the present invention provides a measurement method for aligning the reverse side of a pressure plate of a power transformer, the method further comprising: When processing the front of the pressure plate, drill two round holes in the circumferential direction at the top and right ends, or the bottom and left ends. After flipping it over, use a vernier caliper and a steel ruler to draw two center lines on the two circular holes on the pressure plate.
[0013] Place the measuring fixture on the processing platform and adjust the lifting mechanism to select a suitable height to match the thickness of the pressure plate; Turn on the laser beam device, and it will emit two beams, X and Y; The pressure plate is lifted by an overhead crane and placed on the processing platform, so that the center lines of its two ends are aligned with the laser beam to complete the alignment work.
[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The lifting mechanism allows the equipment to adjust its height according to the different specifications of power transformer pressure plates, thus meeting diverse processing needs. Simultaneously, this fixture can adapt to pressure plates of various specifications and thicknesses by adjusting the height of the lifting platform, making it widely applicable. During operation, the operator simply rotates the handle, causing the screw to rotate within the nut, which in turn pushes movable frame one and movable frame two to slide along the adjustment hole, achieving smooth lifting of the lifting platform. This design not only improves the equipment's flexibility but also greatly simplifies the operation process and reduces manpower input. Furthermore, the detachable connection between the lifting mechanism and the insulating base makes maintenance and parts replacement more convenient, further improving the equipment's efficiency. 2. The designed disassembly mechanism enables the equipment to quickly and accurately position and align the pressure plate, making the alignment process more precise, simple, and efficient. Once the measuring fixture is installed, subsequent alignment work can be easily completed by one or two people, saving manpower and avoiding excessive wear and tear on the machine. The suction cups firmly adhere to the fixed base, ensuring the stability of the entire measuring fixture. The laser emitter emits laser beams through its emission port, forming precise beams on the pressure plate to help operators quickly determine its position. The spirit level further improves measurement accuracy, displaying the horizontal status of the measuring fixture in real time and ensuring the laser beam emitted by the laser emitter is horizontal, thus avoiding measurement errors caused by fixture tilt. Furthermore, the addition of a graduated scale allows operators to intuitively read measurement data, further simplifying the operation process. When it is necessary to change or adjust the measurement position, simply disassemble or reconnect the frame to the fixed base through the connection holes to easily rearrange the measuring fixture, greatly improving work efficiency. Attached Figure Description
[0015] Figure 1 This is an exploded three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the lifting mechanism of the present invention; Figure 3 This is a schematic diagram of the disassembly mechanism of the present invention; Figure 4 This is a three-dimensional structural diagram of the present invention.
[0016] In the diagram: 1. Insulating base; 2. Central circular hole; 3. Contact surface; 4. Lifting mechanism; 5. Fixed base; 6. Disassembly mechanism; 41. Fixed platform; 42. Adjustment hole; 43. Fixing hole; 44. Movable frame one; 45. Movable frame two; 46. Nut; 47. Screw; 48. Rotary handle; 49. Lifting platform; 61. Frame; 62. Suction cup; 63. Laser emitter; 64. Emission port; 65. Connection hole; 66. Spirit bubble; 67. Scale. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Example 1 Please see Figure 1 and Figure 4 The present invention provides a technical solution: a measuring fixture for aligning the reverse side of a power transformer pressure plate, comprising an insulating base 1, a central circular hole 2 provided in the middle part of the insulating base 1, a contact surface 3 provided at the upper end of the insulating base 1, a lifting mechanism 4 detachably connected to the upper end of the contact surface 3, a fixed base 5 fixedly connected to the upper end of the lifting mechanism 4, the outer wall of the central circular hole 2 being connected through to the inner wall of the insulating base 1, and the contact surface 3 being provided at the upper end of the insulating base 1; A central circular hole 2 is provided in the middle of the insulating base 1 to facilitate the installation and positioning of subsequent components. A flat contact surface 3 is provided at the upper end of the insulating base 1. This contact surface 3 is used to install and fix the platform 41. A lifting mechanism 4 is detachably connected to the upper end of the contact surface 3. The setting of this lifting mechanism 4 allows the entire fixture to be adjusted in the vertical direction to accommodate pressure plates of different heights for measurement. The outer wall of the central circular hole 2 is connected to the inner wall of the insulating base 1. This structural setting not only enhances the stability of the fixture, but also ensures the accuracy of the measurement process. In addition, the contact surface 3 is also provided at the upper end of the insulating base 1. This setting further improves the accurate measurement effect of the fixture and the pressure plate, and enhances the accuracy and reliability of the measurement.
[0019] Please see Figure 2In order to quickly adjust the height of the laser emitter 63 on the fixed base 5, the lifting mechanism 4 includes a fixed platform 41. The lower end of the fixed platform 41 is in close contact with the upper end of the contact surface 3. An adjustment hole 42 is provided on one side of the inner wall of the fixed platform 41, and a fixed hole 43 is provided on the other side of the inner wall of the fixed platform 41. A movable frame 44 is rotatably connected to the inner wall of the fixed hole 43. A movable frame 45 is rotatably connected to the middle of the movable frame 44. A nut 46 is fixedly connected to one side of the movable frame 44. A screw 47 is threadedly connected to the inner wall of the nut 46. A handle 48 is fixedly connected to one end of the screw 47. A lifting platform 49 is rotatably connected to the upper end of the movable frame 45. One side of the inner wall of the fixed platform 41 is connected through the outer wall of the adjustment hole 42, and the other side of the inner wall of the fixed platform 41 is connected through the outer wall of the fixed hole 43. Two sets of movable frames 44 and movable frames 45 are provided and are connected by a scissor-type connection and slidably connected along the adjustment hole 42. To enable quick and convenient precise height adjustment of the laser emitter 63 mounted on the fixed base 5, an adjustment hole 42 is provided on one side of the inner wall of the fixed platform 41 to achieve height adjustment, ensuring the stability of the overall structure by ensuring that the lower part of the fixed platform 41 fits tightly against the upper part of the contact surface 3. On the other side of the inner wall of the fixed platform 41, a fixing hole 43 is provided to fix a movable frame 44. The inner wall of the fixing hole 43 is connected to the movable frame 44 by a rotating connection. The middle part of the movable frame 44 is also connected to the movable frame 45 by a rotating connection, forming a flexible linkage structure. A nut 46 is firmly connected to one side of the movable frame 44, and the inner wall of the nut 46 is connected to the screw by a thread. The screw 47 is connected to the upper part of the lifting platform 49 by means of rotation, and the upper part of the second movable frame 45 is connected to the lifting platform 49 by means of rotation, so that the height of the lifting platform 49 can be adjusted within a certain range. In order to ensure the integrity and stability of the structure, one side of the inner wall of the fixed platform 41 is tightly connected to the outer wall of the adjustment hole 42 by means of through connection, and the other side of the inner wall of the fixed platform 41 is also firmly fixed to the outer wall of the fixed hole 43 by means of through connection. The number of the first movable frame 44 and the second movable frame 45 is set to two sets, and these two sets of movable frames are connected to each other by means of scissor connection, and slide along the adjustment hole 42, so as to realize the smooth lifting of the lifting platform 49 and ensure that the height adjustment process of the laser emitter 63 is both fast and accurate.
[0020] Example 2 The upper end of the fixed base 5 is detachably connected to the disassembly mechanism 6. The function of the fixed base 5 is to provide a stable support platform for the disassembly mechanism 6 above. The disassembly mechanism 6 is detachably connected to the upper end of the fixed base 5. The advantage of this setting is that it facilitates the assembly and disassembly of the tooling and improves the flexibility of use.
[0021] Please see Figure 3 To quickly fix the laser emitter 63 to the fixed base 5, the disassembly mechanism 6 includes a frame 61. The lower end of the frame 61 is movably connected to the upper end of the fixed base 5. A suction cup 62 is provided at the lower end of the frame 61. Laser emitters 63 are provided on both sides of the upper end of the frame 61. An emission port 64 is opened at the end of the two laser emitters 63 that are close to each other. Connection holes 65 are opened around the frame 61. A spirit level 66 is fixed to one inner wall of the laser emitter 63. A scale 67 is fixed to one side of the upper end of the frame 61. The lower end of the frame 61 is fixed to the upper end of the suction cup 62. The two sides of the upper end of the frame 61 are fixed to the lower end of the laser emitter 63. The number of suction cups 62 is set to three and connected between the frame 61 and the fixed base 5. The frame 61 is connected to the fixed base 5 through the connection holes 65. To ensure quick and secure installation and fixation of the laser emitter 63 onto the fixed base 5, the lower part of the frame 61 and the upper part of the fixed base 5 are connected by a movable joint, ensuring flexibility and stability. A suction cup 62 is provided at the lower part of the frame 61 to enhance the adhesion to the fixed base 5, preventing hard collisions between the frame 61 and the fixed base 5, increasing service life and improving stability. Laser emitters 63 are installed on both sides of the upper end of the frame 61. Each of these laser emitters 63 has an emission port 64 at its closest point to facilitate precise laser emission. Furthermore, multiple connection holes 65 are evenly distributed around the perimeter of the frame 61. These connection holes 65 are primarily used for a secure connection between the frame 61 and the fixed base 5. The inner wall of the laser emitter 63 is also securely fitted with... A spirit level 66 is fixed in place to monitor and adjust the level in real time during installation, ensuring the accuracy of laser emission. A scale 67 is also fixed on one side of the upper end of the frame 61, facilitating precise measurement and positioning by the operator during installation and adjustment. The lower end of the frame 61 is firmly connected to the upper end of the suction cup 62, while the two sides of the upper end of the frame 61 are tightly connected to the lower end of the laser emitter 63, forming an integral structure. Three suction cups 62 are evenly distributed between the frame 61 and the fixed base 5. The synergistic effect of these three suction cups 62 greatly enhances the adsorption force and stability between the mechanism and the base. At the same time, the frame 61 is reliably connected to the fixed base 5 through the connecting holes 65 around its perimeter, ensuring the stability and safety of the entire disassembly mechanism 6 during operation.
[0022] Working principle: First, fix the lifting bracket to the insulating base 1, then fix the laser beam instrument to the bracket. Once the entire assembly is secured, place it on the operating platform. When processing the front of the pressure plate, drill two holes through the circumference at the top or bottom, and right or left ends. After flipping it over, use calipers and a steel ruler to draw two center lines on the two holes in the pressure plate. Place the measuring device on the processing platform, adjust the lifting bracket to a suitable height to match the thickness of the pressure plate, turn on the laser beam instrument to emit X and Y rays, and use an overhead crane to lift the pressure plate and place it on the operating platform. On the processing platform, align the center lines of both ends with the laser beam to easily complete the alignment. After alignment, begin processing the reverse side of the pressure plate. Place the insulating base 1 stably in a suitable position and use the central circular hole 2 for initial positioning to ensure the accuracy of the insulating base 1's position. Then, operate the lifting mechanism 4, rotate the handle 48, and the screw 47 rotates within the nut 46, causing the movable frame 1 44 and movable frame 2 45 to slide along the adjustment hole 42 via a scissor-type connection, thereby raising or lowering the lifting platform 49. Adjust the fixed base 5, which is fixed above the lifting platform 49, to a suitable height to meet different needs. The height of the pressure plate is measured, and then the disassembly mechanism 6 is installed. The frame 61 is attached to the fixed base 5 by suction cup 62, and the connection between the frame 61 and the fixed base 5 is further reinforced by connecting hole 65 to ensure the stability of the frame 61. Since the laser emitter 63 is installed on both sides of the upper end of the frame 61, the direction of the emission port 64 is adjusted so that it can emit a precise laser beam. By observing the bubble level 66, the horizontal state of the frame 61 is finely adjusted to ensure the accuracy of laser emission. At the same time, the scale 67 is used for precise measurement and positioning. The laser emitter 63 is turned on. The laser beam shines on the pressure plate. Based on the position of the laser beam on the pressure plate and the reading of the scale 67, it is determined whether the back of the pressure plate is aligned. If it is not aligned, the height is finely adjusted by the lifting mechanism 4 according to the deviation of the laser beam, or the pressure plate is rotated. Due to the suction cup 62 and the stable frame 61 structure, the rotation process is relatively stable, so that the laser beam shines on the correct position until the back of the pressure plate is aligned. This efficiently and accurately completes the measurement work of aligning the back of the power transformer pressure plate, greatly saving manpower, material resources and financial resources, and improving work efficiency and measurement accuracy. After initial height adjustment and stable installation, operators can more easily perform subsequent measurements and adjustments. The precise positioning of the laser emitter 63 and the real-time monitoring of the bubble level 66 make the entire measurement process more accurate and reliable. Simultaneously, the scale 67 provides operators with precise measurement and positioning data, further improving measurement accuracy. During measurement, if the back of the pressure plate is not aligned, operators can quickly make fine adjustments using the lifting mechanism 4 based on the laser beam deviation, or slightly rotate the pressure plate to ensure the laser beam accurately illuminates the predetermined position. This flexible adjustment method not only improves measurement efficiency but also significantly reduces errors and losses caused by repeated operations. Ultimately, through this efficient and precise measuring fixture, the alignment of the back of the power transformer pressure plate is quickly completed. The above describes the entire working process of the device. Any content not described in detail in this specification belongs to existing technology known to those skilled in the art.
[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A measuring fixture for aligning the reverse side of a power transformer pressure plate, comprising an insulating base (1), characterized in that: The insulating base (1) has a central circular hole (2) in the middle part, and a contact surface (3) is provided at the upper end of the insulating base (1). A lifting mechanism (4) is detachably connected to the upper end of the contact surface (3). A fixed base (5) is fixedly connected to the upper end of the lifting mechanism (4). A disassembly mechanism (6) is detachably connected to the upper end of the fixed base (5). The lifting mechanism (4) includes a fixed platform (41), the lower end of the fixed platform (41) is in close contact with the upper end of the contact surface (3), an adjustment hole (42) is provided on one side of the inner wall of the fixed platform (41), a fixed hole (43) is provided on the other side of the inner wall of the fixed platform (41), a movable frame one (44) is rotatably connected to the inner wall of the fixed hole (43), a movable frame two (45) is rotatably connected to the middle of the movable frame one (44), a nut (46) is fixedly connected to one side of the movable frame one (44), a screw (47) is threadedly connected to the inner wall of the nut (46), a handle (48) is fixedly connected to one end of the screw (47), and a lifting platform (49) is rotatably connected to the upper end of the movable frame two (45).
2. The measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 1, characterized in that: The outer wall of the central circular hole (2) is connected through the inner wall of the insulating base (1), and the upper end of the insulating base (1) is provided with a contact surface (3).
3. The measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 1, characterized in that: One side of the inner wall of the fixed platform (41) is connected through the outer wall of the adjustment hole (42), and the other side of the inner wall of the fixed platform (41) is connected through the outer wall of the fixed hole (43).
4. A measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 3, characterized in that: The number of movable frame one (44) and movable frame two (45) is set in two sets and connected by scissor type and slidably connected along the adjustment hole (42).
5. A measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 1, characterized in that: The disassembly mechanism (6) includes a frame (61), the lower end of which is movably connected to the upper end of the fixed base (5). A suction cup (62) is provided at the lower end of the frame (61). Laser emitters (63) are provided on both sides of the upper end of the frame (61). An emission port (64) is opened at one end of the two laser emitters (63) that are close to each other. A connection hole (65) is opened around the frame (61). A spirit level (66) is fixed to one inner wall of the laser emitter (63). A scale ruler (67) is fixed to one side of the upper end of the frame (61).
6. A measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 5, characterized in that: The lower end of the frame (61) is fixed to the upper end of the suction cup (62), and the two sides of the upper end of the frame (61) are fixed to the lower end of the laser emitter (63).
7. A measuring fixture for aligning the reverse side of a power transformer pressure plate according to claim 5, characterized in that: The number of suction cups (62) is set to three and connected between the frame (61) and the fixed base (5), and the frame (61) is connected to the fixed base (5) through the connecting hole (65).
8. A measurement method for aligning the reverse side of a power transformer pressure plate, characterized in that: Including the measuring fixture as described in claim 1, the method further includes, When processing the front of the pressure plate, drill two round holes in the circumferential direction at the top and right ends, or the bottom and left ends. After flipping it over, use a vernier caliper and a steel ruler to draw two center lines on the two circular holes on the pressure plate. Place the measuring fixture on the processing platform and adjust the lifting mechanism (4) to select a suitable height to match the thickness of the pressure plate; Turn on the laser beam device, and it will emit two beams, X and Y; The pressure plate is lifted by an overhead crane and placed on the processing platform, so that the center lines of its two ends are aligned with the laser beam to complete the alignment work.