Multi-dimensional anti-seismic reinforcing structure and method for high-voltage wire outlet device of extra-high-voltage transformer

Abstract

The invention discloses a multi-dimensional anti-seismic reinforcing structure and method for a high-voltage wire outlet device of an extra-high-voltage transformer, and relates to the technical field of transformers, the multi-dimensional anti-seismic reinforcing structure comprises a transformer oil tank and a high-voltage CT, the high-voltage CT is installed on the transformer oil tank, the transformer oil tank is fixedly connected with a fixing frame through bolts, and the fixing frame surrounds the outer side of the transformer oil tank; the high-voltage CT is sleeved with a ring sleeve, a first supporting block is fixedly connected to the outer wall of the ring sleeve, a rotating plate is rotationally connected to the first supporting block, and a second supporting block is rotationally connected to the end, away from the first supporting block, of the rotating plate. According to the multi-dimensional anti-seismic reinforcing structure for the high-voltage wire outlet device of the extra-high-voltage transformer, by arranging the first supporting block, the rotating plate, the first positioning frame and other structures, a left triangular stable supporting structure and a right triangular stable supporting structure are formed in the gravity center height of the wire outlet device, the fixing frame surrounds the outer side of the transformer oil tank, and the anti-seismic capacity of the wire outlet device in the horizontal dimension is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformers, and in particular relates to a multi-dimensional seismic reinforcement structure and method for a high-voltage outlet device of an ultra-high voltage transformer. Background Art

[0002] Ultra-high voltage transformers are core equipment in the power transmission system. Some areas are earthquake-prone areas. In order to ensure the safety of the power transmission system, higher requirements are placed on the safety of ultra-high voltage transformers, especially the earthquake resistance of the transformers.

[0003] The high-voltage outgoing line device of the UHV transformer is composed of a high-voltage bushing, a high-voltage CT and a detachable lead. The overall weight is about 20t and the top height is about 18m. It is one of the parts of the entire UHV transformer with the most stringent earthquake resistance requirements. The conventional structure is to arrange a bracket connected to the oil tank on the upper part of the outgoing line device facing the oil tank side, and arrange a supporting bracket under the outgoing line device. This structure can only be reinforced in the vertical dimension of the outgoing line device, while the vibration during an earthquake is multi-dimensional. The outgoing line device can only rely on its own mounting bolts for earthquake resistance in other dimensions, and the earthquake resistance margin is small and the earthquake resistance capacity is weak. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the conventional structure is to arrange a bracket connected to the oil tank on the upper part of the outlet device facing the oil tank side, and arrange a supporting bracket under the outlet device. The structure can only be reinforced in the vertical dimension direction of the outlet device, while the vibration during an earthquake is in multi-dimensional directions. The outlet device can only rely on its own mounting bolts for seismic resistance in other dimensions, and the seismic margin is small and the seismic resistance capacity is weak. A multi-dimensional seismic reinforcement structure and method for a high-voltage outlet device of a UHV transformer with a simple structure and reasonable design is provided, including a transformer oil tank and a high-voltage CT, the high-voltage CT is installed on the transformer oil tank, a fixed frame is fixedly connected to the transformer oil tank by bolts, the fixed frame surrounds the outside of the transformer oil tank, a ring sleeve is mounted on the high-voltage CT, a first support block is fixedly connected to the outer wall of the ring sleeve, a rotating plate is rotatably connected to the first support block, and a second support block is rotatably connected to the end of the rotating plate away from the first support block, a first positioning frame is fixedly connected to the second support block, and the first positioning frame is fixedly connected to the fixed frame by bolts.

[0005] Preferably, the number of the first supporting blocks is two, and the two first supporting blocks are respectively distributed on both sides of the ring sleeve.

[0006] Preferably, a connecting plate is fixedly connected to one side of the ring sleeve close to the fixed frame, and a second positioning frame is fixedly connected to one end of the connecting plate away from the ring sleeve, and the second positioning frame is fixedly connected to the fixed frame by bolts.

[0007] Preferably, a third support block is fixedly connected to the outer wall of the ring sleeve, the third support block and the connecting plate are symmetrically distributed about the axis of the ring sleeve, a threaded rod is slidably provided on the third support block, a support plate is fixedly connected to the bottom of the threaded rod, and the support plate is attached to the bottom end of the high-voltage CT.

[0008] Preferably, a threaded sleeve is threadedly connected to the threaded rod, and two threaded sleeves are provided, and the two threaded sleeves are respectively located at the upper and lower sides of the third support block.

[0009] Preferably, a reinforcing support rod is provided at the bottom of the support plate.

[0010] Preferably, a high voltage bushing is connected to the top of the high voltage CT.

[0011] The second aspect of the present invention provides a multi-dimensional seismic reinforcement method for a high-voltage outlet device of an ultra-high voltage transformer. At the height of the overall center of gravity of the high-voltage outlet device of the ultra-high voltage transformer, a straight-pull reinforcement bracket connected to the oil tank is arranged opposite the oil tank side, and oblique-pull reinforcement brackets connected to the oil tank are arranged on the left and right sides to form two left and right triangular stable support structures at the height of the center of gravity, and a vertical reinforcement bracket is arranged directly below the overall center of gravity of the high-voltage outlet device.

[0012] The beneficial effects of the present invention are:

[0013] 1. The present invention forms two triangular stable support structures on the left and right sides at the height of the center of gravity of the outlet device by arranging the first support block, the rotating plate and the first positioning frame, and the fixed frame surrounds the outer side of the transformer oil tank, thereby improving the seismic resistance of the outlet device in the horizontal dimension;

[0014] 2. A connecting plate and a second positioning frame are provided to reinforce the position between the two rotating plates to further improve the stability of the outlet device;

[0015] 3. By setting up structures such as threaded rods and support plates, a longitudinal support structure is formed to improve the seismic resistance of the vertical dimension of the outlet device;

[0016] 4. By setting up reinforcing struts, a reinforcing structure is formed directly below the overall center of gravity of the outlet device, which further improves the seismic resistance of the outlet device in the vertical dimension, and the support plate cooperates with the reinforcing struts to expand the supporting area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the multi-dimensional seismic reinforcement structure of the high-voltage outlet device of the ultra-high voltage transformer of the present invention.

[0018] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0019] Figure 3It is a schematic diagram of the transformer oil tank and high-voltage CT structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the connecting plate and the second positioning frame of the present invention.

[0021] In the figure: 1. Transformer oil tank; 2. High-voltage CT; 3. High-voltage bushing; 4. Fixed frame; 5. Ring sleeve; 6. First support block; 7. Turn plate; 8. Second support block; 9. First positioning frame; 10. Connecting plate; 11. Second positioning frame; 12. Third support block; 13. Threaded sleeve; 14. Threaded rod; 15. Support plate; 16. Reinforcement support rod. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] The present invention provides Figure 1 to Figure 4 The multi-dimensional seismic reinforcement structure of a high-voltage outlet device of an ultra-high voltage transformer shown in the figure comprises a transformer oil tank 1 and a high-voltage CT2. The high-voltage CT2 is installed on the transformer oil tank 1. The top of the high-voltage CT2 is connected to a high-voltage bushing 3. When in use, a detachable lead is also provided to cooperate with the high-voltage bushing 3. The high-voltage CT2, the high-voltage bushing 3 and the detachable lead cooperate to form an outlet device.

[0024] In order to improve the stability of the outlet device, a fixed frame 4 is fixedly connected to the transformer oil tank 1 by bolts, and the fixed frame 4 surrounds the outer side of the transformer oil tank 1. A ring sleeve 5 is mounted on the high voltage CT2, and a first support block 6 is fixedly connected to the outer wall of the ring sleeve 5. Two first support blocks 6 are provided, and the two first support blocks 6 are respectively distributed on both sides of the ring sleeve 5. A rotating plate 7 is rotatably connected to the first support block 6, and a second support block 8 is rotatably connected to the end of the rotating plate 7 away from the first support block 6. A first positioning frame 9 is fixedly connected to the second support block 8, and the first positioning frame 9 is fixedly connected to the fixed frame 4 by bolts.

[0025] During installation and use, the ring sleeve 5 can be installed on the high-voltage CT 2 in a sleeve manner and fixed by bolts or the like, and then the first positioning frame 9 is fixed on the fixed frame 4 by bolts.

[0026] By arranging structures such as the first support block 6, the rotating plate 7 and the first positioning frame 9, two left and right triangular stable support structures are formed at the height of the center of gravity of the outlet device, and the fixed frame 4 surrounds the outside of the transformer oil tank 1, thereby improving the seismic resistance of the outlet device in the horizontal dimension.

[0027] In order to further improve the stability of the outlet device, a connecting plate 10 is fixedly connected to one side of the ring sleeve 5 close to the fixed frame 4, and a second positioning frame 11 is fixedly connected to one end of the connecting plate 10 away from the ring sleeve 5. The second positioning frame 11 is fixedly connected to the fixed frame 4 by bolts. The connecting plate 10 and the second positioning frame 11 are arranged to reinforce the position between the two rotating plates 7, so as to further improve the stability of the outlet device.

[0028] The outer wall of the ring sleeve 5 is fixedly connected with a third support block 12, and the third support block 12 and the connecting plate 10 are symmetrically distributed about the axis of the ring sleeve 5. A threaded rod 14 is slidably provided on the third support block 12, and a support plate 15 is fixedly connected to the bottom of the threaded rod 14, and the support plate 15 is attached to the bottom end of the high-voltage CT2. A threaded sleeve 13 is threadedly connected to the threaded rod 14, and two threaded sleeves 13 are provided, and the two threaded sleeves 13 are respectively located on the upper and lower sides of the third support block 12.

[0029] During specific installation, the threaded rod 14 can be slid on the third support block 12 to adjust the height position of the support plate 15. At the same time, the end of the support plate 15 away from the threaded rod 14 abuts against the outer wall of the transformer oil tank 1. Then, the two threaded sleeves 13 are rotated, and the two threaded sleeves 13 move toward each other and fit on the third support block 12 to fix the position of the threaded rod 14, forming a longitudinal support structure, thereby improving the seismic resistance of the vertical dimension of the outlet device.

[0030] A reinforcing strut 16 is provided at the bottom of the support plate 15. The reinforcing strut 16 can be installed at the bottom of the support plate 15 by bolting, and the bottom end of the reinforcing strut 16 is fixed to the power facility used to install the transformer oil tank 1, forming a reinforcement structure directly below the overall center of gravity of the outlet device, further improving the seismic resistance of the vertical dimension of the outlet device, and the support plate 15 cooperates with the reinforcing strut 16 to expand the supporting area.

[0031] In practical applications, the present invention provides a multi-dimensional seismic reinforcement method for a high-voltage outlet device of an ultra-high voltage transformer. At the overall center of gravity height of the high-voltage outlet device of the ultra-high voltage transformer, a straight-pull reinforcement bracket connected to the oil tank is arranged opposite the oil tank side, and oblique-pull reinforcement brackets connected to the oil tank are arranged on the left and right sides, forming left and right triangular stable support structures at the center of gravity height, thereby improving the seismic resistance of the outlet device in the horizontal dimension, and a vertical reinforcement bracket is arranged directly below the overall center of gravity of the high-voltage outlet device, thereby improving the seismic resistance of the outlet device in the vertical dimension.

[0032] Through three-dimensional modeling and seismic simulation calculation of the specific structure of this multi-dimensional seismic reinforcement method, the maximum equivalent stress of the reinforced bracket in each dimension is obtained, and the maximum equivalent stress is less than the yield strength of the steel plate. Through seismic simulation calculation, it can be known that the new multi-dimensional seismic reinforcement method can meet the requirements of level 9 seismic fortification.

[0033] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A multi-dimensional seismic reinforcement structure for a high-voltage outlet device of an ultra-high voltage transformer, comprising a transformer oil tank (1) and a high-voltage CT (2), wherein the high-voltage CT (2) is mounted on the transformer oil tank (1), and is characterized in that: A fixed frame (4) is fixedly connected to the transformer oil tank (1) by bolts, and the fixed frame (4) surrounds the outer side of the transformer oil tank (1). A ring sleeve (5) is sleeved on the high-voltage CT (2), and a first support block (6) is fixedly connected to the outer wall of the ring sleeve (5). A rotating plate (7) is rotatably connected to the first support block (6), and a second support block (8) is rotatably connected to one end of the rotating plate (7) away from the first support block (6). A first positioning frame (9) is fixedly connected to the second support block (8), and the first positioning frame (9) is fixedly connected to the fixed frame (4) by bolts.

2. The multi-dimensional seismic reinforcement structure of the high-voltage outlet device of the UHV transformer according to claim 1 is characterized in that: The number of the first support blocks (6) is two, and the two first support blocks (6) are respectively distributed on two sides of the ring sleeve (5).

3. The multi-dimensional seismic reinforcement structure of the high-voltage outlet device of a UHV transformer according to claim 1 is characterized in that: A connecting plate (10) is fixedly connected to one side of the ring sleeve (5) close to the fixed frame (4), and a second positioning frame (11) is fixedly connected to one end of the connecting plate (10) away from the ring sleeve (5). The second positioning frame (11) is fixedly connected to the fixed frame (4) by bolts.

4. The multi-dimensional seismic reinforcement structure of the high-voltage outlet device of the UHV transformer according to claim 3 is characterized in that: A third support block (12) is fixedly connected to the outer wall of the annular sleeve (5); the third support block (12) and the connecting plate (10) are symmetrically distributed about the axis of the annular sleeve (5); a threaded rod (14) is slidably arranged on the third support block (12); a support plate (15) is fixedly connected to the bottom of the threaded rod (14); and the support plate (15) is attached to the bottom end of the high-voltage CT (2).

5. The multi-dimensional seismic reinforcement structure of the high-voltage outlet device of the UHV transformer according to claim 4 is characterized in that: A threaded sleeve (13) is threadedly connected to the threaded rod (14), and two threaded sleeves (13) are provided. The two threaded sleeves (13) are respectively located at the upper and lower sides of the third support block (12).

6. The multi-dimensional seismic reinforcement structure of the high voltage outlet device of the UHV transformer according to claim 4 is characterized in that: A reinforcing support rod (16) is provided at the bottom of the support plate (15).

7. The multi-dimensional seismic reinforcement structure of the high voltage outlet device of the UHV transformer according to claim 1 is characterized in that: The top end of the high-voltage CT (2) is connected to a high-voltage bushing (3).

8. A multi-dimensional seismic reinforcement method for a high-voltage outlet device of an ultra-high voltage transformer, comprising a reinforcement structure as claimed in any one of claims 1 to 7, characterized in that: At the height of the overall center of gravity of the high-voltage outlet device of the ultra-high voltage transformer, a straight-pull reinforcement bracket connected to the oil tank is arranged opposite the oil tank side, and oblique-pull reinforcement brackets connected to the oil tank are arranged on the left and right sides to form two left and right triangular stable support structures at the height of its center of gravity, and a vertical reinforcement bracket is arranged directly below the overall center of gravity of the high-voltage outlet device.

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