High-stability power transformer based on photovoltaic power generation

Abstract

The utility model discloses a kind of high-stability power transformers based on photovoltaic power generation, including installation pedestal, step-up transformer and hydraulic buffer structure. Concave installation crossbeam is fixedly installed in installation pedestal both sides, its inner cavity forms plug-in installation slot for plug-in dry-type transformer cross-flow cooling fan. Innovatively, plug-in automatic locking structure is set in the lower end of plug-in installation slot, through the cooperation of locking block and fan bottom limiting groove, under the action of spring, the function of plug-in automatic locking, pull-down unlocking is realized, so that fan can be quickly disassembled without tools, improve maintenance efficiency. At the same time, through the motor heat dissipation through-hole on the middle partition plate and the fan of symmetrical arrangement form directional heat dissipation air duct, effectively avoid heat accumulation, improve the stability and service life of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, specifically a highly stable power transformer based on photovoltaic power generation. Background Technology

[0002] Step-up dry-type transformers are one of the key pieces of equipment in photovoltaic power generation systems. Their main function is to convert the direct current generated by the photovoltaic array into voltage through an inverter, thereby boosting the voltage to meet the requirements of grid connection or long-distance transmission. Because photovoltaic power output is affected by environmental factors such as sunlight and temperature, it exhibits certain fluctuations. Therefore, the matching power transformers are required to have high operational stability and reliability.

[0003] In existing technologies, to improve the vibration and shock resistance of power transformers during operation, a hydraulic buffer structure is often installed between the bottom of the transformer and the installation foundation, or combined with a spring shock absorber, to absorb and buffer the vibrations caused by external mechanical forces and internal electromagnetic forces, thereby improving the overall stability of the equipment.

[0004] Furthermore, dry-type transformers generate a large amount of heat during operation due to iron and copper losses. If heat dissipation is not timely, the temperature rise will be too high, directly affecting the insulation life and operating efficiency. To ensure proper heat dissipation of step-up transformers, the common practice is to install several dry-type transformer cross-flow cooling fans at the bottom of the outer surface on both the front and rear sides of the transformer using bolts, thereby enhancing the heat dissipation effect through forced air cooling.

[0005] However, this bolt-fixed installation method has obvious drawbacks: when the cooling fan needs routine maintenance, cleaning or replacement, the operator must disassemble a large number of bolts, which is a cumbersome and time-consuming process, increasing the difficulty and cost of maintenance work.

[0006] Therefore, we propose a highly stable power transformer based on photovoltaic power generation. Utility Model Content

[0007] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a highly stable power transformer based on photovoltaic power generation with an automatic plug-in locking structure, enabling the cooling fan to achieve "plug-in locking and pull-out unplugging" without tools. This solves the problem of cumbersome maintenance associated with traditional bolt fixing methods and effectively addresses the issues in the background technology.

[0008] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-stability power transformer based on photovoltaic power generation, comprising a mounting base, a step-up transformer, and a hydraulic buffer structure. The step-up transformer is fixedly mounted on the upper outer surface of the mounting base. A base plate is provided at the lower part of the mounting base. Concave mounting beams are fixedly mounted on both the front and rear outer surfaces of the mounting base. The opening side of the concave mounting beam is away from the mounting base. Honeycomb holes are formed on the upper outer surface of the concave mounting beam, extending to the upper part of the inner cavity of the concave mounting beam. The hydraulic buffer structure is fixed between the two ends of the lower outer surface of the concave mounting beam and the upper outer surface of the base plate. End plates are fixedly installed at both ends of the concave mounting beam cavity. Middle partition plates are fixedly installed on both sides of the middle part of the concave mounting beam cavity. A motor heat dissipation through hole is opened on one side of the middle partition plate, and the motor heat dissipation through hole extends to the outer surface of the other side of the middle partition plate. An insertion mounting groove is formed between the end plate and the middle partition plate. A dry-type transformer cross-flow cooling fan is inserted into the insertion mounting groove. An automatic insertion locking structure is provided in the middle of the lower end of the insertion mounting groove. The automatic insertion locking structure includes a sliding groove, a movable block, a locking block, an insertion inclined surface, a mounting shell, a guide ring, a pull rod, a compression spring, and a limit block. A limit groove is opened in the middle of the lower outer surface of the dry-type transformer cross-flow cooling fan.

[0009] Preferably, after the dry-type cross-flow cooling fan is inserted into the insertion mounting slot, the drive motor of the dry-type cross-flow cooling fan is located at the end near the middle partition.

[0010] Preferably, the slide groove is formed in the middle of the lower end of the insertion mounting groove, and the slide groove extends to the lower outer surface of the concave mounting beam. The movable block extends through the slide groove, and the locking block is fixed to the upper outer surface of the movable block.

[0011] Preferably, the locking block has a plug-in inclined surface on the side near the insertion port of the plug-in mounting slot; when the compression spring is in its natural state, the bottom of the plug-in inclined surface is not higher than the bottom surface of the inner cavity of the plug-in mounting slot.

[0012] Preferably, the mounting shell is located at the lower part of the slide groove, and the mounting shell is fixed to the lower outer surface of the concave mounting beam. The compression spring and the limiting block are both located inside the mounting shell. The guide ring is fixed to the middle of the lower outer surface of the mounting shell and extends to the middle of the lower end of the inner cavity of the mounting shell. The pull rod passes through the guide ring and extends to the lower part of the mounting shell. The movable block is fixed to the middle of the upper outer surface of the limiting block. The upper outer surface of the compression spring is fixedly connected to the middle of the lower outer surface of the limiting block. The compression spring is movably sleeved on the outer wall of the upper part of the pull rod. The compression spring is fixed between the bottom of the inner cavity of the mounting shell and the lower outer surface of the limiting block.

[0013] Preferably, after the dry-type cross-flow cooling fan is inserted into the plug-in mounting slot and in place, the locking block is engaged in the limiting slot under the reset action of the compression spring.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a highly stable power transformer based on photovoltaic power generation, which has the following beneficial effects: 1. This high-stability power transformer based on photovoltaic power generation, through the combination of a plug-in mounting slot and an automatic locking structure, allows for automatic locking and fixation of the dry-type cross-flow cooling fan simply by inserting it into the mounting slot during installation; during disassembly, it can be pulled out by releasing the lock using a pull rod; this process requires no tools or tightening bolts, making operation simple and quick, significantly shortening the maintenance or replacement time of the cooling fan, reducing maintenance costs and the impact on system operation.

[0015] 2. This high-stability power transformer based on photovoltaic power generation forms an effective directional cooling airflow by symmetrically arranging the dry-type crossflow cooling fans in the concave mounting beams on both sides of the step-up transformer and placing the drive motor end close to the partition plate with motor heat dissipation holes, thus avoiding heat accumulation and extending the service life of the cooling fans. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-stability power transformer based on photovoltaic power generation according to this utility model.

[0017] Figure 2 This is a schematic diagram of the concave mounting beam and hydraulic buffer structure in a high-stability power transformer based on photovoltaic power generation according to this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of a dry-type cross-flow cooling fan in a high-stability power transformer based on photovoltaic power generation, according to this utility model.

[0019] Figure 4 This is a side cross-sectional view of an automatic locking structure for plugging into a high-stability power transformer based on photovoltaic power generation, according to this utility model.

[0020] In the diagram: 1. Mounting base; 2. Step-up transformer; 3. Base plate; 4. Hydraulic buffer structure; 5. Concave mounting beam; 6. Dry-type transformer crossflow cooling fan; 7. Honeycomb holes; 8. End plate; 9. Middle partition plate; 10. Motor heat dissipation through hole; 11. Insertion mounting slot; 12. Insertion automatic locking structure; 13. Limiting slot; 14. Slide groove; 15. Movable block; 16. Locking block; 17. Insertion inclined surface; 18. Mounting shell; 19. Guide ring; 20. Tie rod; 21. Compression spring; 22. Limiting block. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1-4 As shown, the power transformer mainly includes a mounting base 1, a step-up transformer 2, a base plate 3, a hydraulic buffer structure 4, a concave mounting beam 5, and a dry-type transformer crossflow cooling fan 6.

[0023] A step-up transformer 2 is mounted on the upper outer surface of the mounting base 1 by welding or bolting. A base plate 3 is provided at the lower part of the mounting base 1 for fixing to the ground or mounting foundation. To improve the transformer's resistance to vibration and impact during operation, four sets of hydraulic buffer structures 4 are provided between the concave mounting beams 5 fixed on both sides of the mounting base 1 and the base plate 3. These structures can effectively absorb and buffer vibrations caused by external mechanical forces and internal electromagnetic forces, which is existing technology.

[0024] Concave mounting beams 5 are fixedly installed on the front and rear outer surfaces of the mounting base 1, with their open sides facing away from the mounting base 1. The upper outer surface of the concave mounting beams 5 has honeycomb holes 7, which extend to the upper part of the inner cavity of the concave mounting beams 5, facilitating air circulation and heat dissipation.

[0025] End plates 8 are fixedly installed at both ends of the inner cavity of the concave mounting beam 5, and middle partition plates 9 are fixedly installed on both sides of the middle part of the inner cavity. A motor heat dissipation through hole 10 is opened on one side of the middle partition plate 9, and the through hole extends to the outer surface of the other side of the middle partition plate 9. An insertion mounting groove 11 is formed between the end plate 8 and the middle partition plate 9 for inserting and installing the dry transformer crossflow cooling fan 6.

[0026] When the dry-type cross-flow cooling fan 6 is inserted into the insertion mounting slot 11, its drive motor end is positioned close to the middle partition 9. This facilitates the formation of an effective directional cooling airflow through the motor heat dissipation through hole 10, preventing heat buildup in the motor and extending its service life.

[0027] An automatic locking structure 12 is provided at the center of the lower end of the insertion mounting slot 11. This structure is the core component for facilitating the easy assembly and disassembly of the cooling fan. The automatic locking structure 12 includes a sliding groove 14, a movable block 15, a locking block 16, an insertion inclined surface 17, a mounting shell 18, a guide ring 19, a pull rod 20, a compression spring 21, and a limiting block 22. Correspondingly, a limiting groove 13 is provided at the center of the lower outer surface of the dry-type cross-flow cooling fan 6.

[0028] The slide groove 14 is located in the middle of the lower end of the insertion mounting groove 11 and extends to the lower outer surface of the concave mounting beam 5. The movable block 15 passes through the slide groove 14, and the locking block 16 is fixed to the upper outer surface of the movable block 15. The locking block 16 has an insertion ramp 17 on the side near the insertion port of the insertion mounting groove 11; when the compression spring 21 is in its natural state, the bottom of the insertion ramp 17 is not higher than the bottom surface of the inner cavity of the insertion mounting groove 11.

[0029] The mounting housing 18 is located at the lower part of the slide groove 14 and is fixed to the lower outer surface of the concave mounting beam 5. The compression spring 21 and the limiting block 22 are both located inside the mounting housing 18. The guide ring 19 is fixed to the middle of the lower outer surface of the mounting housing 18 and extends through to the middle of the lower end of the inner cavity of the mounting housing 18. The pull rod 20 passes through the guide ring 19 and extends to the lower part of the mounting housing 18. The movable block 15 is fixed to the middle of the upper outer surface of the limiting block 22. The upper outer surface of the compression spring 21 is fixedly connected to the middle of the lower outer surface of the limiting block 22. The compression spring 21 is movably sleeved on the upper outer wall of the pull rod 20 and fixed between the bottom of the inner cavity of the mounting housing 18 and the lower outer surface of the limiting block 22.

[0030] When installing the dry-type transformer cross-flow cooling fan 6, the operator simply pushes the fan into the insertion mounting slot 11. During insertion, the bottom of the dry-type transformer cross-flow cooling fan 6 contacts the insertion ramp 17 of the locking block 16, applying downward pressure. This pressure is transmitted through the locking block 16 and the movable block 15 to the limiting block 22, causing the limiting block 22 to compress the compression spring 21 and move downward, thereby allowing the locking block 16 to fully retract into the slide groove 14, making way for the dry-type transformer cross-flow cooling fan 6.

[0031] When the dry-type cross-flow cooling fan 6 continues to advance until it reaches the limit groove 13 and is directly above the locking block 16, the return force of the compression spring 21 pushes the limit block 22 upward, thereby causing the locking block 16 to move upward and engage in the limit groove 13, thus achieving automatic locking and fixing of the fan. At this time, the fan is firmly restricted in the insertion mounting slot 11, completing the installation.

[0032] When the dry-type transformer cross-flow cooling fan 6 needs to be disassembled for maintenance or replacement, the operator only needs to pull down the pull rod 20. The pull rod 20 drives the limit block 22 to compress the compression spring 21 and move it downwards. This causes the locking block 16 to exit the limit groove 13 and retract into the slide groove 14 via the movable block 15. After releasing the lock, the dry-type transformer cross-flow cooling fan 6 can be easily pulled out of the plug-in mounting slot 11.

[0033] The entire installation and disassembly process requires no tools, enabling convenient operation of "plug and lock, pull and remove," which significantly improves maintenance efficiency.

[0034] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-stability power transformer based on photovoltaic power generation, comprising a mounting base (1), a step-up transformer (2), and a hydraulic buffer structure (4), wherein the step-up transformer (2) is fixedly mounted on the upper outer surface of the mounting base (1), and a base plate (3) is provided on the lower part of the mounting base (1), characterized in that: Concave mounting beams (5) are fixedly installed on the front and rear outer surfaces of the mounting base (1). The opening side of the concave mounting beams (5) is away from the mounting base (1). The upper outer surface of the concave mounting beams (5) is provided with honeycomb holes (7). The honeycomb holes (7) penetrate to the upper part of the inner cavity of the concave mounting beams (5). The hydraulic buffer structure (4) is fixed between the two ends of the lower outer surface of the concave mounting beams (5) and the upper outer surface of the base plate (3). End plates (8) are fixedly installed on both the left and right ends of the inner cavity of the concave mounting beams (5). Middle partitions (9) are fixedly installed on both the left and right sides of the middle part of the inner cavity of the concave mounting beams (5). A motor heat dissipation channel is opened on one side of the middle partition (9). Hole (10), the motor heat dissipation through hole (10) extends to the outer surface of the other side of the partition plate (9), and the end plate (8) and the partition plate (9) form a plug-in mounting groove (11). A dry transformer crossflow cooling fan (6) is plugged into the plug-in mounting groove (11). A plug-in automatic locking structure (12) is provided in the middle of the lower end of the plug-in mounting groove (11). The plug-in automatic locking structure (12) includes a sliding groove (14), a movable block (15), a locking block (16), a plug-in inclined surface (17), a mounting shell (18), a guide ring (19), a pull rod (20), a compression spring (21), and a limiting block (22). A limiting groove (13) is opened in the middle of the outer surface of the lower end of the dry transformer crossflow cooling fan (6).

2. The high-stability power transformer based on photovoltaic power generation according to claim 1, characterized in that: After the dry-type cross-flow cooling fan (6) is inserted into the insertion mounting slot (11), the drive motor of the dry-type cross-flow cooling fan (6) is located near the middle partition (9).

3. A high-stability power transformer based on photovoltaic power generation according to claim 2, characterized in that: The slide groove (14) is located in the middle of the lower end of the insertion mounting groove (11), and the slide groove (14) extends to the lower outer surface of the concave mounting beam (5). The movable block (15) extends through the slide groove (14), and the locking block (16) is fixed to the upper outer surface of the movable block (15).

4. A high-stability power transformer based on photovoltaic power generation according to claim 3, characterized in that: The locking block (16) has a plug-in inclined surface (17) on the side near the insertion port of the plug-in mounting groove (11); when the compression spring (21) is in its natural state, the bottom of the plug-in inclined surface (17) is not higher than the bottom surface of the inner cavity of the plug-in mounting groove (11).

5. A high-stability power transformer based on photovoltaic power generation according to claim 4, characterized in that: The mounting shell (18) is located at the lower part of the slide groove (14), and the mounting shell (18) is fixed to the lower outer surface of the concave mounting beam (5). The compression spring (21) and the limiting block (22) are both located inside the mounting shell (18). The guide ring (19) is fixed to the middle of the lower outer surface of the mounting shell (18). The guide ring (19) extends through to the middle of the lower end of the inner cavity of the mounting shell (18). The pull rod (20) extends through the guide ring (19). 19) and extends to the lower part of the mounting shell (18), the movable block (15) is fixed to the middle part of the upper outer surface of the limiting block (22), the upper outer surface of the compression spring (21) is fixedly connected to the middle part of the lower outer surface of the limiting block (22), the compression spring (21) is movably sleeved on the outer wall of the upper part of the pull rod (20), and the compression spring (21) is fixed between the bottom of the inner cavity of the mounting shell (18) and the lower outer surface of the limiting block (22).

6. A high-stability power transformer based on photovoltaic power generation according to claim 5, characterized in that: When the dry-type cross-flow cooling fan (6) is inserted into the plug-in mounting slot (11) and in place, the locking block (16) is locked into the limiting slot (13) under the reset action of the compression spring (21).

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