A smart grid high energy conversion transformer system

Abstract

The application relates to the technical field of transformers, in particular to a transformer system for high-energy conversion of smart grids; the system comprises a sleeve body, a wiring terminal, an oil pillow, an umbrella skirt, a voltage-sharing ring and a wiring box; when the conductive columns are close to each other, the cores of the cable are clamped; then a staff member manually rotates a push rod, the push rod rotates at the closed plate, and the mounting block and the two conductive columns rotate synchronously; in the process, the two conductive columns clamp the cores of the cable, the two conductive columns bend the cores of the cable, the cores of the cable are wound on the two conductive columns, and the cable is fixed; since the cable is wound on the two conductive columns and clamped by the two conductive columns at the same time, the fixing effect of the cable is better, the existing cable is prevented from transmitting horizontal or vertical tension to the bolt connection part, the bolt is prevented from being unevenly stressed, and the problem that the bolt and the wiring plate are loose is solved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically a transformer system for high-energy conversion in smart grids. Background Technology

[0002] A transformer system is a complete electrical system with a transformer as its core, supplemented by equipment such as protection, control, measurement, and auxiliary systems, to achieve safe power conversion, operational status monitoring, and fault early warning and protection. It is not a single device, but rather a system that ensures the stable and reliable operation of the transformer in the power grid through the coordination of the equipment, and avoids the impact of transformer failure on power supply.

[0003] In a power system, the transformer is the core equipment for realizing power transmission and voltage transformation. The "transformer system" is a complete functional unit built around the transformer, and the high-voltage bushing is a key component in the transformer system to ensure safe operation.

[0004] The transformer consists of a magnetic circuit system, an electrical circuit system, a cooling system, an insulation system, and protection and lead-out components. The protection and lead-out components are the core components for regulating the output voltage of the tap changer, and include components such as the tap changer, bushings, and pressure relief valves. Bushings include high-voltage bushings, medium-voltage bushings, and low-voltage bushings. The high-voltage bushing is an inherent component of the transformer body. One end of it is directly connected to the high-voltage winding inside the transformer, and the other end extends outside the transformer tank to connect to the high-voltage line of the power grid. It is a bridge between the transformer and the external high-voltage system.

[0005] The upper end of the high-voltage bushing connected to the power grid is usually a top terminal, which is mostly a flat terminal block. The method is to fix the core end of the cable to the terminal block with bolts to achieve conductivity. However, when the transformer is used outdoors, the outdoor overhead line is affected by wind, icing, and line tension fluctuations. This will transmit lateral or longitudinal tension to the bolt connection through the cable, resulting in uneven stress on the bolt. This causes the bolt and terminal block to loosen, which in turn causes the cable to fall off the terminal block, resulting in the high-voltage bushing losing its function and affecting the working status of the entire transformer system.

[0006] In summary, to address the technical problems raised in this paper, this invention proposes a transformer system for high-energy conversion in smart grids. Summary of the Invention

[0007] To address the issue mentioned above where outdoor overhead lines, affected by wind, icing, and line tension fluctuations, transmit lateral or longitudinal tension through the cables to bolted connections, causing uneven bolt stress, loosening of the bolts and ultimately cable detachment, this invention proposes a high-energy conversion transformer system for smart grids. This system includes a high-voltage bushing mounted on the transformer. The bushing comprises a bushing body, terminals, an oil conservator, sheds, and an equalizing ring. The terminals are located at the top of the bushing body, the oil conservator below the terminals, the sheds on the outer ring of the bushing body, and the equalizing ring at the lower end of the bushing body. The terminals also include:

[0008] The junction box is located at the top of the oil tank. A wire insertion slot is opened through the middle of the top of the junction box. A strip groove is opened through one end of the junction box. A rectangular groove is opened in the middle of the inner wall of the strip groove. The size of the rectangular groove is larger than that of the strip groove. A sealing plate is slidably connected inside the rectangular groove. The sealing plate completely seals the strip groove.

[0009] A push rod is installed through the closed plate, with one end of the push rod located inside the junction box. The connection between the outer wall of the push rod and the closed plate is a sliding connection, and the push rod is located inside the strip groove. A drive plate is provided at the end of the push rod away from the junction box.

[0010] The mounting block is located at one end of the push rod inside the junction box. The end of the mounting block away from the push rod has a groove. Inside the groove, two conductive posts are slidably connected by a spring. In the initial state, the two conductive posts are brought closer to each other by the action of the spring inside the groove.

[0011] The pressing block is located inside the junction box, and its upper end is arc-shaped. The pressing block is also located at the center of the two conductive posts.

[0012] As a preferred embodiment of this application, the pressing block is located at the end of the junction box away from the strip groove, and in the initial state, when the sealing plate moves downward, the two conductive posts do not contact the upper end of the pressing block.

[0013] As a preferred embodiment of this application, a conductive ring is sleeved on the outer side of the conductive post, and the inner wall of the conductive ring is rotatably connected to the outer wall of the conductive post.

[0014] As a preferred embodiment of this application, a blocking plate is slidably connected to the push rod. In the initial state, the blocking plate is in contact with the outer wall of the junction box, and a compression spring is provided between the blocking plate and the drive plate.

[0015] As a preferred embodiment of this application, the junction box has multiple limiting grooves distributed in a ring on the inner wall near the strip groove, and a limiting post is provided at one end of the mounting block near the strip groove. In the initial state, the limiting post is embedded in the inside of the limiting groove.

[0016] As a preferred embodiment of this application, the junction box is provided with four telescopic rods at the top, each telescopic rod has a spring inside, a fixing plate is provided at the top of the telescopic rod, a fixing hole is provided in the middle of the fixing plate, and a locking element is provided in the fixing hole.

[0017] As a preferred embodiment of this application, a sealing ring is embedded in the inner wall of the wiring slot.

[0018] As a preferred embodiment of this application, the sealing ring is hollow inside, and the inside of the sealing ring is connected to the inside of the four telescopic rods through an air pipe.

[0019] The beneficial effects of this invention are as follows:

[0020] The conductive posts clamp the cable cores together. Then, the operator manually rotates a push rod, which rotates at the sealing plate. Simultaneously, the mounting block and the two conductive posts rotate synchronously. During this process, the two conductive posts clamp the cable cores, causing them to bend the cores. The cable cores then wrap around the two conductive posts, thus securing the cable. Because the cable is wrapped around and clamped by the two conductive posts, the cable is more securely fixed, preventing the transmission of lateral or longitudinal tension to the bolt connection points, which could lead to uneven bolt stress and loosening between the bolts and the connector. Attached Figure Description

[0021] Figure 1 This is a perspective view of the high-pressure bushing in this invention;

[0022] Figure 2 This is a perspective view of the junction box in this invention;

[0023] Figure 3 yes Figure 2 Top view in the middle;

[0024] Figure 4 This is a top view of the internal structure of the junction box in this invention;

[0025] Figure 5 This is an internal structural view of the junction box in this invention;

[0026] Figure 6 This is a cross-sectional view of the strip groove and the rectangular groove in this invention;

[0027] Figure 7 This is a perspective view of the push rod and compression spring in this invention;

[0028] Figure 8 This is a cross-sectional view of the telescopic rod in this invention;

[0029] Figure 9This is a structural view of the limiting groove in this invention.

[0030] In the diagram: 1. Sleeve body; 2. Terminal block; 3. Oil reservoir; 4. Umbrella skirt; 5. Equalizing ring; 21. Junction box; 22. Socket groove; 211. Strip groove; 212. Rectangular groove; 213. Sealing plate; 214. Push rod; 23. Drive disc; 231. Mounting block; 24. Slide groove; 241. Conductive post; 242. Pressing block; 25. Conductive ring; 243. Barrier disc; 232. Compression spring; 233. Limiting groove; 26. Limiting post; 261. Telescopic rod; 27. Fixing plate; 28. Fixing hole; 281. Locking element; 282. Sealing ring; 29. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1:

[0033] like Figures 1 to 9 As shown; a transformer system for high-energy conversion in a smart grid, the transformer system includes a high-voltage bushing installed on the transformer. The high-voltage bushing includes a bushing body 1, terminals 2, an oil conservator 3, skirts 4, and an equalizing ring 5. Terminals 2 are located at the top of the bushing body 1, the oil conservator 3 is located below the terminals 2, the skirts 4 are located on the outer ring of the bushing body 1, and the equalizing ring 5 is located at the lower end of the bushing body 1. Terminals 2 also include:

[0034] Junction box 21 is located at the upper end of oil tank 3. A wire insertion groove 22 is provided through the middle of the upper end of junction box 21. A strip groove 211 is provided through one end of junction box 21. A rectangular groove 212 is provided in the middle of the inner wall of strip groove 211. The size of rectangular groove 212 is larger than that of strip groove 211. A sealing plate 213 is slidably connected inside rectangular groove 212. The sealing plate 213 completely seals strip groove 211.

[0035] A push rod 23 is disposed through the closed plate 213, such that one end of the push rod 23 is located inside the junction box 21, the connection between the outer wall of the push rod 23 and the closed plate 213 is a sliding connection, and the push rod 23 is located inside the strip groove 211; a drive disk 231 is provided at the end of the push rod 23 away from the junction box 21.

[0036] Mounting block 24 is located at one end of push rod 23 inside junction box 21. At the end of mounting block 24 away from push rod 23, there is a groove 241. Two conductive posts 242 are slidably connected inside the groove 241 by spring. In the initial state, the two conductive posts 242 are brought closer to each other by the action of the spring inside the groove 241.

[0037] The pressing block 25 is located inside the junction box 21, and the upper end of the pressing block 25 is arc-shaped. At the same time, the pressing block 25 is located at the center of the two conductive posts 242.

[0038] The pressing block 25 is located at the end of the junction box 21 away from the strip groove 211, and in the initial state, when the closing plate 213 moves downward, the two conductive posts 242 do not contact the upper end of the pressing block 25.

[0039] A conductive ring 243 is sleeved on the outer side of the conductive post 242, and the inner wall of the conductive ring 243 is rotatably connected to the outer wall of the conductive post 242.

[0040] The specific workflow is as follows;

[0041] When in use, the operator first connects the power grid to the high-voltage bushing, then connects the cable to the power grid. Next, the cable's core is inserted into the junction box 21 through the insertion slot 22. Before this, the operator manually pushes the push rod 23 downwards. As the push rod 23 pushes downwards, it moves the sealing plate 213 downwards. The sealing plate 213 moves downwards inside the rectangular slot 212. Because the size of the rectangular slot 212 is larger than the size of the strip slot 211, the size of the sealing plate 213 is larger than the size of the strip slot 211. When the sealing plate 213 moves up and down inside the rectangular slot 212, the sealing plate 213... The groove 211 is closed; the closing plate 213 and the push rod 23 move downwards synchronously, causing the mounting block 24 located at one end of the push rod 23 inside the junction box 21 to move downwards synchronously. The mounting block 24 drives the two conductive posts 242 to move downwards synchronously. During this process, the gap between the two conductive posts 242 contacts the upper end of the pressing block 25. The upper end of the pressing block 25 is arc-shaped, so that when the two conductive posts 242 move downwards, the pressing block 25 pushes against the two conductive posts 242, causing the two conductive posts 242 to slide inside the sliding groove 241 on the mounting block 24. The two conductive posts 242 move away from each other, so that the two The gap between the conductive posts 242 increases; then, after the cable core is inserted into the junction box 21, the cable core is positioned between the two conductive posts 242, and the cable core passes between the two conductive posts 242; then, the operator pushes the push rod 23 upward, causing the two conductive posts 242 to move upward, allowing them to slide upward on the surface of the cable core until they disengage from the pressing block 25. At this point, under the action of the spring inside the sliding groove 241 of the mounting block 24, the two conductive posts 242 move closer together to clamp the cable core; then, the operator manually rotates the push rod 23, causing the push rod 23 to rotate... The cable rotates at the sealing plate 213, while the mounting block 24 and the two conductive posts 242 rotate synchronously. During this process, the two conductive posts 242 clamp the cable core, causing the cable core to bend. At the same time, the cable core wraps around the two conductive posts 242, thereby fixing the cable. Since the cable is wrapped around the two conductive posts 242 and clamped by them, the cable fixing effect is better, avoiding the problem of the existing cable transmitting lateral or longitudinal tension to the bolt connection, which can cause uneven stress on the bolt and loosening between the bolt and the terminal block.

[0042] Based on the above, the pressing block 25 is positioned inside the junction box at the end furthest from the slot 211. Initially, if the push rod 23 is not pushed into the junction box 21, but instead pushed downwards, the middle of the two conductive posts 242 will not contact the upper end of the pressing block 25. When installing the cable, the push rod 23 is first pushed into the junction box 21, causing the mounting block 24 and the two conductive posts 242 to move away from the slot 211 inside the junction box 21. Then, the push rod 23 is pushed downwards. During this process, the ends of the two conductive posts 242 furthest from the slot 211 press against the upper end of the pressing block 25, opening the two conductive posts 242. The cable is then inserted into the junction box 21 through the insertion slot 22, so that the cable core is positioned between the two conductive posts. Between the posts 242; then push the push rod 23 upward, the two conductive posts 242 clamp the wire core of the cable, and then rotate the push rod 23 by the drive disk 231 at the end of the push rod 23. It should be noted that after the push rod 23 is disengaged from the pressing post, the push rod 23 is rotated. Then, while the push rod 23 is pulled away from the junction box 21, the rotation of the push rod 23 is maintained, so that the mounting block 24 and the two conductive posts 242 are rotated and move closer to the strip groove 211 until the mounting block 24 is in close contact with the strip groove 211. When the two conductive posts 242 are rotated, the wire core of the cable is wound around the surface of the two conductive posts 242 in stages, so as to avoid the accumulation of the wire core of the cable during the winding process, thereby improving the conductivity of the conductive posts 242.

[0043] Furthermore, by fitting a conductive ring 243 onto the surface of the conductive post 242, the cable core contacts the conductive ring 243. This allows the cable to be removed from the junction box 21 during maintenance. After maintenance, when installing the cable, the two conductive posts 242 and the conductor ring are pressed downwards, causing the outer surface of the conductive ring 243 to contact the pressing block 25. As the conductive ring 243 moves downwards on the surface of the pressing block 25, friction occurs between it and the surface of the pressing block 25. The conductive ring 243 rotates on the surface of the conductive post 242, changing the contact point between the conductive ring 243 and the cable core when clamping it. This prevents the cable core from being squeezed and contacted by the previous area of ​​the conductive ring 243, instead ensuring contact with the other side of the conductive ring 243. This avoids the problem of increased resistance caused by the oxide layer forming in the previous contact area of ​​the conductive ring 243 and re-contacting the cable core.

[0044] Example 2:

[0045] like Figures 1 to 9As shown; a blocking plate 232 is slidably connected to the push rod 23. In the initial state, the blocking plate 232 is in contact with the outer wall of the junction box 21, and a compression spring 233 is provided between the blocking plate 232 and the drive plate 231.

[0046] The junction box 21 has multiple limiting grooves 26 arranged in a ring on the inner wall near the strip groove 211. The mounting block 24 is provided with a limiting post 261 at one end near the strip groove 211. In the initial state, the limiting post 261 is embedded in the inside of the limiting groove 26.

[0047] The specific workflow is as follows;

[0048] By slidably connecting the push rod 23 to the blocking plate 232, and having the blocking plate 232 contact the outer wall of the junction box 21, and by providing a compression spring 233 between the blocking plate 232 and the drive plate 231, based on the above embodiment, when the push rod 23 is pushed into the junction box 21 by the drive plate 231, the compression spring 233 between the drive plate 231 and the blocking plate 232 is compressed, causing the compression spring 233 to be in a compressed state; when the push rod 23 is rotated and pulled out from the inside of the junction box 21, the compression spring 233 elastically returns to its original position, facilitating the reset of the drive plate 231, thereby improving the reset effect of the push rod 23;

[0049] Furthermore, by distributing multiple limiting grooves 26 in a ring on the inner wall of the junction box 21 near the strip groove 211, and setting a limiting post 261 at one end of the mounting block 24 near the strip groove 211, when the push rod 23 is pushed into the junction box 21, the mounting block 24 causes the limiting post 261 to disengage from the limiting groove 26. This allows the limiting groove 26 to no longer limit the limiting post 261 when the push rod 23 rotates the mounting block 24 and the two conductive posts 242. When the two conductive posts 242 squeeze the cable core and the cable core is wrapped around the conductive posts 242, the mounting block 24 moves towards the strip groove 211 simultaneously, causing the limiting post 261 on the mounting block 24 to embed into the limiting groove 26. This prevents the push rod 23 and the conductive posts 242 from rotating, thus achieving the stability of the conductive posts 242. As a result, the cable core cannot rotate and detach from the two conductive posts 242.

[0050] Example 3:

[0051] like Figures 1 to 9 As shown; the upper end of the junction box 21 is provided with four telescopic rods 27, the inside of the telescopic rods 27 is provided with springs, the upper end of the telescopic rods 27 is provided with a fixing plate 28, the middle of the fixing plate 28 is provided with a fixing hole 281, and a locking element 282 is provided in the fixing hole 281.

[0052] The specific workflow is as follows;

[0053] By installing four telescopic rods 27 at the upper end of the junction box 21, with springs inside each rod, the cable is first passed through the fixing hole 281 at the center of the upper end of the fixing plate 28 during installation. A locking element 282 is installed in the fixing hole 281. The locking element 282 is a clamping clamp, such as a fixing fixture, found in the prior art. After the cable passes through the fixing hole 281 at the upper end of the fixing plate 28, the operator manually locks the locking element 282. Tighten, then the staff controls the push rod 23 to rotate, causing the two conductive posts 242 to clamp and wind the wire core on the cable. During this process, when the cable is wound around the two conductive posts 242, the cable located outside the junction box 21 will be pulled towards the inside of the junction box 21. At this time, because the locking member 282 fixes the cable to the fixing plate 28, when the two conductive posts 242 wind the cable core, they will pull the cable. At this time, the cable will pull the locking member 282, and then the locking member 282 will... The fixing plate 28 is pulled downwards, during which the telescopic rod 27 retracts downwards; then the limiting post 261 on the mounting block 24 is embedded into the limiting groove 26, completing the cable installation; when removing the cable, the operator needs to control the drive disc 231 to push the push rod 23, pushing the push rod 23 into the junction box 21. During this process, the limiting post 261 slides out of the limiting groove 26. Then the operator rotates the push rod 23 in the opposite direction, causing the wire core on the cable to fall off between the two conductive posts 242. During this process, the wire core of the cable falls off the conductive posts 242, making the cable between the conductive posts 242 and the fixing plate 28 slack. The spring in the telescopic rod 27 elastically resets, pushing the telescopic rod 27 upwards. At the same time, the fixing plate 28 moves upwards, causing the fixing plate 28 to pull the cable, making the cable taut, until the cable wound on the two conductive posts 242 is completely unwound from the two conductive posts 242. At this time, the fixing plate 28 tauts the cable through the spring in the telescopic rod 27, making the cable easy to remove.

[0054] Example 4:

[0055] like Figures 1 to 9 As shown; a sealing ring 29 is embedded in the inner wall of the insertion slot 22;

[0056] The interior of the sealing ring 29 is hollow, and the interior of the sealing ring 29 is connected to the interior of the four telescopic rods 27 through an air pipe;

[0057] The specific workflow is as follows;

[0058] Based on the above embodiment, a sealing ring 29 is embedded in the inner wall of the insertion slot 22, and the interior of the sealing ring 29 is hollow. The interior of the sealing ring 29 is connected to the interior of the four telescopic rods 27 through an air pipe. When the cable of the two conductive posts 242 is coiled, the telescopic rods 27 retract downwards, and the fixing plate 28 moves downwards. During this process, the gas inside the telescopic rods 27 enters the sealing ring 29 through the air pipe. The sealing ring 29 is made of existing rubber material, which causes the sealing ring 29 to expand. When the sealing ring 29 expands, it squeezes the outer ring of the cable inside the insertion slot 22, thereby sealing the outer ring of the cable with the cable removal slot, preventing external dust from entering the junction box 21, and preventing external impurities from falling on the conductive posts 242, which increases the resistance of the conductive posts 242. When the cable is removed, the telescopic rods 27 will return upwards, and the fixing plate 28 will return, allowing the gas inside the sealing ring 29 to flow back, thereby making the sealing ring 29 no longer seal the outer ring of the cable, facilitating the removal of the cable.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer system for high-energy conversion in a smart grid, the transformer system comprising a high-voltage bushing mounted on a transformer, the high-voltage bushing comprising a bushing body (1), terminals (2), an oil conservator (3), skirts (4), and an equalizing ring (5); the terminals (2) are located at the top of the bushing body (1), the oil conservator (3) is located below the terminals (2), the skirts (4) are located on the outer ring of the bushing body (1), and the equalizing ring (5) is located at the lower end of the bushing body (1); characterized in that, Terminal block (2) also includes: A junction box (21) is installed at the upper end of the oil tank (3). A wire insertion slot (22) is provided through the middle of the upper end of the junction box (21). A strip groove (211) is provided through one end of the junction box (211). A rectangular groove (212) is provided in the middle of the inner wall of the strip groove (211). The size of the rectangular groove (212) is larger than that of the strip groove (211). A sealing plate (213) is slidably connected inside the rectangular groove (212). The sealing plate (213) completely seals the strip groove (211). A push rod (23) is provided through the closed plate (213), such that one end of the push rod (23) is located inside the junction box (21), the connection between the outer wall of the push rod (23) and the closed plate (213) is in a sliding connection, and the push rod (23) is located inside the strip groove (211); a drive disc (231) is provided at the end of the push rod (23) away from the junction box (21); The mounting block (24) is located at one end of the push rod (23) inside the junction box (21). The end of the mounting block (24) away from the push rod (23) has a groove (241). The inside of the groove (241) is connected by two conductive posts (242) through springs. In the initial state, the two conductive posts (242) are brought closer to each other by the action of the spring inside the groove (241). The pressing block (25) is located inside the junction box (21), and the upper end of the pressing block (25) is arc-shaped. At the same time, the pressing block (25) is located at the center of the two conductive posts (242).

2. The transformer system for high-energy conversion in a smart grid as described in claim 1, characterized in that: The pressing block (25) is located at the end of the junction box (21) away from the strip groove (211), and in the initial state, when the closing plate (213) moves downward, the two conductive posts (242) do not contact the upper end of the pressing block (25).

3. The transformer system for high-energy conversion in a smart grid as described in claim 2, characterized in that: A conductive ring (243) is fitted on the outer side of the conductive post (242), and the inner wall of the conductive ring (243) is rotatably connected to the outer wall of the conductive post (242).

4. The transformer system for high-energy conversion in a smart grid as described in claim 1, characterized in that: A blocking plate (232) is slidably connected to the push rod (23). In the initial state, the blocking plate (232) is in contact with the outer wall of the junction box (21), and a compression spring (233) is provided between the blocking plate (232) and the drive plate (231).

5. The transformer system for high-energy conversion in a smart grid as described in claim 4, characterized in that: The junction box (21) has multiple limiting grooves (26) distributed in a ring on the inner wall near the strip groove (211). The mounting block (24) has a limiting post (261) at one end near the strip groove (211). In the initial state, the limiting post (261) is embedded in the inside of the limiting groove (26).

6. The transformer system for high-energy conversion in a smart grid as described in claim 5, characterized in that: The junction box (21) is provided with four telescopic rods (27) at the top. The telescopic rods (27) are provided with springs inside. The telescopic rods (27) are provided with a fixing plate (28) at the top. The fixing plate (28) has a fixing hole (281) in the middle. A locking element (282) is provided in the fixing hole (281).

7. The transformer system for high-energy conversion in a smart grid as described in claim 1, characterized in that: A sealing ring (29) is embedded in the inner wall of the insertion slot (22).

8. The transformer system for high-energy conversion in a smart grid as described in claim 7, characterized in that: The interior of the sealing ring (29) is hollow, and the interior of the sealing ring (29) is connected to the interior of the four telescopic rods (27) through an air pipe.

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