On-load tap-changing capacitance charging pile box-type transformer

Abstract

The present invention relates to the technical field of box-type transformers, specifically a on-load tap-changing capacity charging pile box-type transformer, which includes a box body, a heat dissipation structure, a sliding structure, a fixing structure, a limiting structure, a transformer, a sliding-out structure and a control cabinet. The setting of the sliding structure facilitates the extraction of the transformer from the inside of the box body by a certain distance during the maintenance of the transformer, increasing the operating space and improving the maintenance efficiency. The setting of the fixing structure facilitates the adjustment of the position of the transformer inside the box body and realizes the rapid fixation of the transformer, avoiding the repeated tightening and disassembly of bolts. The setting of the sliding-out structure effectively solves the problem that it is difficult to insert the cabinet body into the box body due to the narrow installation space or operation passage of the box body, simplifies the operation process and improves the flexibility. The setting of the heat dissipation structure is conducive to the circulation of air inside the box body, effectively reducing the oil temperature of the transformer and ensuring that the temperature inside the box always remains within a safe range.

Description

Technical Field

[0001] The present invention relates to the technical field of box-type transformers, specifically a on-load capacity-adjustable charging pile box-type transformer. Background Art

[0002] A box-type transformer is a factory prefabricated indoor and outdoor compact power distribution device that integrates high-voltage switchgear, distribution transformers, and low-voltage power distribution devices according to a certain wiring scheme. On-load capacity adjustment means that the transformer can adjust its capacity under load. For a charging pile box-type transformer, this on-load capacity adjustment function can flexibly adjust the output capacity of the transformer according to the load condition of the charging pile.

[0003] When installing the oil-immersed transformer inside a traditional box-type transformer, usually workers lift the transformer into the internal space of the device, align the high-voltage bushing on the transformer with the high-voltage busbar or cable terminal head of the incoming line device, and fix the transformer with bolts. When the position of the transformer needs to be adjusted, the bolts need to be repeatedly disassembled and tightened, resulting in low installation efficiency.

[0004] When the transformer inside the device needs to be repaired, usually operators have to drill into the spare space inside the device to perform maintenance operations. However, due to the limited operating space inside the device, it is not convenient for operators to perform maintenance operations such as disassembling and connecting wires on the transformer, resulting in poor flexibility.

[0005] When installing cabinets such as high-voltage control cabinets or incoming line cabinets inside the device, usually multiple people cooperate to lift the cabinet and then sequentially insert multiple cabinets into the device. However, since the box-type transformer needs to integrate multiple parts such as transformers, high-voltage equipment, and low-voltage equipment, the installation space or operating passage inside the device is narrow, and the volume of the cabinet is large, making it inconvenient to insert the cabinet into the device, resulting in low operating efficiency and poor flexibility. Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides a on-load capacity-adjustable charging pile box-type transformer.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a on-load capacity-adjustable charging pile box-type transformer, including a box body, a heat dissipation structure installed on the box body, a sliding structure arranged inside the box body, a fixing structure connected to the sliding structure, a limiting structure cooperating with the sliding structure, a transformer installed on the sliding structure, a sliding-out structure installed inside the box body, and a control cabinet connected to the sliding-out structure.

[0008] The sliding structure includes two guide rails and four sliding sleeves slidably connected to the guide rails. The guide rails are fixedly connected inside the box body. A connecting frame is fixedly connected between two symmetrically arranged sliding sleeves. Two extension plates are fixedly connected between the two connecting frames. Two sliding frames are arranged between the two extension plates. A transformer is fixedly connected between the two sliding frames. A fixing structure is cooperated on the sliding frame;

[0009] The fixing structure includes a driving block and a roller rotatably connected to the driving block. The driving blocks are slidably connected to both ends of the sliding frame. Guide grooves are formed on the upper surfaces of the two extension plates. The roller is rollingly connected to the guide groove. Two first lead screws are threadedly connected to the sliding frame near the outside. The bottoms of the two first lead screws are respectively rotatably connected to the two driving blocks. A sliding rod is slidably connected to each end of the other sliding frame. The bottoms of the two sliding rods are respectively fixedly connected to the other two driving blocks. A connecting bar is fixedly connected to the top end of each of the two sliding rods. The end of the connecting bar is rotatably connected to the first lead screw. A second rack is fixedly connected to the upper surface of one of the extension plates. A first rack is fixedly connected to one end of each of the two sliding frames near the second rack. The first rack and the second rack are meshed with each other.

[0010] Specifically, a rotating handle is fixedly connected to the top end of the first lead screw. The rotating handle has an "L" - shaped structure.

[0011] Specifically, the two first lead screws are symmetrically arranged, the two connecting bars are symmetrically arranged, and the driving block has a "U" - shaped structure.

[0012] Specifically, the two guide rails are symmetrically arranged. The connecting frame and the sliding frame both have a "U" - shaped structure. The end of the extension plate near the inside has a "U" - shaped structure.

[0013] Specifically, the limiting structure includes two springs and a connecting plate fixedly connected between the two springs. Two springs are fixedly connected inside one of the guide rails. The connecting plate is slidably connected to the inner wall of the guide rail. A limiting block is fixedly connected to the end of the connecting plate near the inside. Limiting grooves are formed on both of the sliding sleeves near the connecting plate.

[0014] Specifically, a cover plate is arranged above the connecting plate. The cover plate is fixedly connected to the guide rail. The end of the cover plate is slidably connected to the limiting block. A driving hole is formed at the end of the cover plate away from the limiting block.

[0015] Specifically, the slide-out structure includes two pairs of first support seats and first guide rods fixedly connected between two adjacent first support seats. The inside of the box body is fixedly connected with two pairs of first support seats, and each of the two first guide rods is slidably connected with a connecting sleeve. A base plate is fixedly connected between the two connecting sleeves, and three control cabinets are fixedly connected to the base plate.

[0016] Specifically, five second support seats are provided between the two first guide rods, the second support seat is fixedly connected to the inner wall of the box, a motor is fixedly connected to the inside of the box, a second screw rod is fixedly connected to the output shaft of the motor, the second screw rod is rotatably connected to one of the second support seats, one end of the base plate is fixedly connected to a driving plate, the driving plate and the second screw rod are threadedly connected, and two driving sleeves are fixedly connected to the other end of the base plate, the two driving sleeves are fixedly connected to the second guide rods, the two second guide rods are respectively slidably connected to the two pairs of second support seats on the outside, and the ends of the second guide rods are fixedly connected to the driving plate.

[0017] Specifically, two guide plates are fixedly connected to the inner wall of the box body, the two guide plates are slidably connected to the bottom plate, and the driving plate is in a "convex" shape.

[0018] Specifically, the heat dissipation structure includes a protective door and a heat dissipation net fixedly connected to the protective door, multiple protective doors are rotatably connected to the outer wall of the box, multiple heat dissipation plates are fixedly connected to the top of the box, and two fans are fixedly connected to the inner wall of the box.

[0019] The beneficial effects of the present invention are:

[0020] (1) The on-load capacity-adjusting charging pile box-type transformer described in the present invention has a sliding structure installed inside the box body. The sliding structure is used in conjunction with the limiting structure. The setting of the sliding structure facilitates the transformer to be pulled out a certain distance from the inside of the box body when repairing the transformer, thereby increasing the operating space and improving the maintenance efficiency.

[0021] (2) The on-load capacity-adjusting charging pile box-type transformer described in the present invention has a fixed structure connected to the sliding structure. The setting of the fixed structure facilitates increasing the distance that the transformer can be pulled out, further increasing the operating space, and at the same time facilitates adjusting the position of the transformer inside the box, so that the high-voltage bushing on the transformer is aligned with the high-voltage busbar or cable terminal of the incoming equipment during installation, and realizes rapid fixing of the transformer, avoiding repeated tightening and disassembly of bolts.

[0022] (3) The on-load capacity-adjustable charging pile box-type transformer of the present invention is provided with a sliding-out structure inside the box body. The setting of the sliding-out structure effectively solves the problem that it is difficult to insert the cabinet into the box body due to the narrow installation space or operation channel of the box body, simplifies the operation process, and improves flexibility.

[0023] (4) The on-load capacity-adjustable charging pile box-type transformer of the present invention is equipped with a heat dissipation structure on the box body. The setting of the heat dissipation structure is beneficial to the circulation of air inside the box body, effectively reduces the oil temperature of the transformer, and ensures that the temperature inside the box always remains within a safe range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the on-load capacity-adjustable charging pile box-type transformer provided by the present invention;

[0026] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of part A shown in;

[0027] Figure 3 It is a schematic diagram of the connection structure between the guide rail and the sliding sleeve of the present invention;

[0028] Figure 4 It is a schematic diagram of the connection structure between the roller and the guide groove of the present invention;

[0029] Figure 5 It is a schematic diagram of the connection structure between the connecting plate and the limiting block of the present invention;

[0030] Figure 6 It is a schematic diagram of the connection structure between the box body and the heat dissipation structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the connection structure between the box body and the first support seat of the present invention;

[0032] Figure 8 is Figure 7 an enlarged schematic diagram of the structure of part B shown in;

[0033] Figure 9 It is a schematic diagram of the connection structure between the bottom plate and the connecting sleeve of the present invention.

[0034] In the figure: 1. Box body; 2. Heat dissipation structure; 201. Protection door; 202. Heat dissipation net; 203. Heat dissipation plate; 204. Fan; 3. Sliding structure; 301. Guide rail; 302. Sliding sleeve; 303. Connecting frame; 304. Extension plate; 305. Sliding frame; 4. Fixing structure; 401. Driving block; 402. Roller; 403. First lead screw; 404. Connecting bar; 405. Slide bar; 406. Rotating handle; 407. First rack; 408. Second rack; 409. Guide groove; 5. Limiting structure; 501. Spring; 502. Connecting plate; 503. Cover plate; 504. Limiting block; 505. Limiting groove; 506. Driving hole; 6. Transformer; 7. Sliding-out structure; 701. First support seat; 702. First guide rod; 703. Connecting sleeve; 704. Bottom plate; 705. Second support seat; 706. Second guide rod; 707. Driving plate; 708. Driving sleeve; 709. Motor; 710. Second lead screw; 711. Guide plate; 8. Control cabinet. Detailed implementation manners

[0035] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0036] Such as Figures 1-7As shown in the figure, the on-load adjustable capacity charging pile box-type transformer of the present invention includes a box body 1, a heat dissipation structure 2 installed on the box body 1, a sliding structure 3 arranged inside the box body 1, a fixing structure 4 connected to the sliding structure 3, a limiting structure 5 cooperating with the sliding structure 3, a transformer 6 installed on the sliding structure 3, a sliding-out structure 7 installed inside the box body 1, and a control cabinet 8 connected to the sliding-out structure 7; the sliding structure 3 includes two guide rails 301 and four sliding sleeves 302 slidably connected to the guide rails 301. The guide rails 301 are fixedly connected inside the box body 1. A connecting frame 303 is fixedly connected between two symmetric sliding sleeves 302. Two extension plates 304 are fixedly connected between the two connecting frames 303. Two sliding frames 305 are arranged between the two extension plates 304. A transformer 6 is fixedly connected between the two sliding frames 305. The fixing structure 4 is arranged in cooperation with the sliding frames 305. The two guide rails 301 are symmetrically arranged. The connecting frame 303 and the sliding frames 305 are both in a "U" - shaped structure. The inner - end of the extension plate 304 near the inside is in a "U" - shaped structure; Remove the wiring on the transformer 6, and then pull the transformer 6 outwards so that the limiting block 504 is no longer engaged with the front - end limiting groove 505. During the process of pulling the transformer 6, the transformer 6 drives the two sliding frames 305 at the bottom to move outwards. Since the first rack 407 and the second rack 408 are in an engaged state at this time, the sliding frames 305 drive the extension plates 304 and the connecting frames 303 at the bottom to move outwards. The connecting frame 303 drives the two pairs of sliding sleeves 302 to slide outwards along the guide rails 301 until the inner - side sliding sleeve 302 slides directly above the limiting block 504. At this time, release the screwdriver, and the limiting block 504 slides upwards under the reset action of the spring 501 until it is engaged with the limiting groove 505 directly above. At this time, after pulling the transformer 6 outwards for a certain distance, the sliding sleeves 302 are effectively limited, thereby improving the stability. At the same time, by pulling the transformer 6 outwards for a certain distance, the operation space for the staff is increased, avoiding the staff from reaching into the box body 1 for maintenance, and improving the maintenance efficiency.

[0037] Specifically, as Figures 2-4As shown, the fixing structure 4 includes a driving block 401 and a roller 402 rotatably connected to the driving block 401. The driving block 401 is slidably connected to both ends of the carriage 305. Guide grooves 409 are formed on the upper surfaces of the two extension plates 304. The roller 402 is in rolling connection with the guide groove 409. Two first lead screws 403 are threadedly connected to the carriage 305 near the outside. The bottoms of the two first lead screws 403 are respectively rotatably connected to the two driving blocks 401. A slide bar 405 is slidably connected to each end of the other carriage 305. The bottoms of the two slide bars 405 are respectively fixedly connected to the other two driving blocks 401. A connecting bar 404 is fixedly connected to the top of each of the two slide bars 405. The end of the connecting bar 404 is rotatably connected to the first lead screw 403. A second rack 408 is fixedly connected to the upper surface of one of the extension plates 304. A first rack 407 is fixedly connected to one end of each of the two carriages 305 near the second rack 408. The first rack 407 and the second rack 408 are meshed with each other. A rotating handle 406 is fixedly connected to the top of the first lead screw 403. The rotating handle 406 is in an "L" shape. The two first lead screws 403 are symmetrically arranged. The two connecting bars 404 are symmetrically arranged. The driving block 401 is in a "U" shape;If it is found that the operating space is still limited during maintenance, just rotate the rotating handles 406 at both ends of the carriage 305, and then rotate the handle 406 to drive the first lead screw 403 to rotate. Since the first lead screw 403 is threadedly connected to the carriage 305, the first lead screw 403 drives the driving block 401 at the bottom to slide downward along the inner wall of the carriage 305. At this time, the driving block 401 drives the roller 402 at the bottom to move downward, and the same operation is repeated at the other end. At the same time, during the process of rotating the handle 406, the first lead screw 403 drives the connecting bar 404 to move downward, the connecting bar 404 drives the slide bar 405 at the other end to slide downward, and the slide bar 405 drives the driving block 401 and the roller 402 on the other carriage 305 to move downward. At this time, the four rollers 402 lift the carriage 305 upward by a certain distance, so that the first rack 407 at the end of the carriage 305 is no longer engaged with the second rack 408 on the extension plate 304. Then, the position of the transformer 6 can be adjusted by rolling the rollers 402 in the guide groove 409. At this time, the transformer 6 is further pulled outwards by a certain distance, further increasing the operating space and facilitating the maintenance of the transformer 6. After the transformer 6 is further pulled outwards by a certain distance, rotate the rotating handle 406 in the reverse direction to make the first rack 407 engage with the second rack 408 again, effectively limiting the position of the transformer 6. At the same time, through the engagement between the first rack 407 and the second rack 408, and the cooperation of the rollers 402 rolling in the guide groove 409, the rapid installation of the transformer 6 is realized, avoiding the use of bolts for fixation, and solving the problem that it is difficult to tighten the bolts due to the limited operating space. At the same time, during the process of pushing the transformer 6 into the box body 1, the position of the transformer 6 can be adjusted quickly and arbitrarily, which is beneficial to align the high-voltage bushing on the transformer 6 with the high-voltage bus or cable terminal head of the incoming line equipment, and has strong flexibility.;

[0038] Specifically, such as Figures 2-5As shown, the limiting structure 5 includes two springs 501 and a connecting plate 502 fixedly connected between the two springs 501. Two springs 501 are fixedly connected inside one of the guide rails 301. The connecting plate 502 is slidably connected to the inner wall of the guide rail 301. A limiting block 504 is fixedly connected to one end of the connecting plate 502 close to the inside. Limiting grooves 505 are formed on both of the two sliding sleeves 302 close to the connecting plate 502. A cover plate 503 is provided above the connecting plate 502. The cover plate 503 is fixedly connected to the guide rail 301. The end of the cover plate 503 is slidably connected to the limiting block 504. A driving hole 506 is formed at one end of the cover plate 503 away from the limiting block 504. During the process of repairing the transformer 6 inside the equipment, in order to solve the problems that it is not convenient to wire the transformer 6 or disassemble the outer shell due to the limited internal space of the box body 1, just first stretch the body into the box body 1, then find the cover plate 503 on one of the guide rails 301, and then insert a screwdriver into the driving hole 506. At this time, the screwdriver presses the connecting plate 502 downward, causing the connecting plate 502 to compress the spring 501 downward. At the same time, the connecting plate 502 drives the limiting block 504 at the end to slide downward. At this time, since one of the sliding sleeves 302 close to the outside is directly above the limiting block 504, the connecting plate 502 drives the limiting block 504 to slide out of the limiting groove 505. At this time, the limiting block 504 no longer blocks the sliding of the sliding sleeve 302 on the guide rail 301, thus facilitating the subsequent extraction of the transformer 6 from the inside of the box body 1. At the same time, the position of the transformer 6 is limited by the engagement of the sliding sleeve 302, avoiding the displacement of the transformer 6 under external vibration and improving the flexibility.

[0039] Specifically, as Figure 1 and Figures 6-9As shown, the sliding-out structure 7 includes two pairs of first support seats 701 and first guide rods 702 fixedly connected between two adjacent first support seats 701. Two pairs of first support seats 701 are fixedly connected to the inside of the box body 1. A connecting sleeve 703 is slidably connected to each of the two first guide rods 702. A bottom plate 704 is fixedly connected between the two connecting sleeves 703. Three control cabinets 8 are fixedly connected to the bottom plate 704. Five second support seats 705 are provided between the two first guide rods 702. The second support seats 705 are fixedly connected to the inner wall of the box body 1. A motor 709 is fixedly connected to the inside of the box body 1. A second lead screw 710 is fixedly connected to the output shaft of the motor 709. The second lead screw 710 is rotatably connected to one of the second support seats 705. One end of the bottom plate 704 is fixedly connected to a driving plate 707. The driving plate 707 is threadedly connected to the second lead screw 710. The other end of the bottom plate 704 is fixedly connected to two driving sleeves 708. A second guide rod 706 is fixedly connected to each of the two driving sleeves 708. The two second guide rods 706 are respectively slidably connected to the two pairs of second support seats 705 on the outside. The end of the second guide rod 706 is fixedly connected to the driving plate 707. Two guide plates 711 are fixedly connected to the inner wall of the box body 1. The two guide plates 711 are slidably connected to the bottom plate 704. The driving plate 707 has a "convex" structure;When installing the control cabinet 8 inside the installation box body 1, first, the motor 709 at the bottom of the box body 1 drives the second lead screw 710 to rotate on the second support base 705. Since the end of the second lead screw 710 is threadedly connected to the driving plate 707, the second lead screw 710 drives the bottom plate 704 to slide outward along the two guide plates 711. During the process of the bottom plate 704 sliding outward, the connecting sleeves 703 at both ends of the bottom surface of the bottom plate 704 slide outward along the first guide rods 702. And since the two ends of the two first guide rods 702 are fixed inside the box body 1 through the first support bases 701, the stability of the bottom plate 704 is improved. At the same time, since two driving sleeves 708 are installed at the central position of the bottom surface of the bottom plate 704, the two driving sleeves 708 are connected to the driving plate 707 through two second guide rods 706, and the second guide rods 706 are supported by two pairs of second support bases 705. When the connecting sleeves 703 at both ends of the bottom plate 704 touch the first support bases 701 near the outside, at this time, the bottom plate 704 has slid out of the box body 1 to the maximum extent. The second support base 705 cooperates with the second guide rod 706 to support the central position of the bottom plate 704, avoiding the outer section of the bottom plate 704 from tilting under the action of gravity, further improving the stability of the bottom plate 704. At the same time, the control cabinet 8 is fixed on the bottom plate 704 by bolts, and then the output shaft of the motor 709 rotates in the reverse direction, driving the bottom plate 704 together with the control cabinet 8 to slide into the box body 1, effectively solving the problem that it is difficult to insert the control cabinet 8 into the box body 1 due to the limited internal space of the box body 1 and the small volume of the operation channel, simplifying the operation process and improving the installation efficiency.

[0040] Specifically, as Figure 1 , Figure 6 and Figure 7 shown, the heat dissipation structure 2 includes a protective door 201 and a heat dissipation net 202 fixedly connected to the protective door 201. A plurality of protective doors 201 are rotatably connected to the outer wall of the box body 1, a plurality of heat dissipation plates 203 are fixedly connected to the top of the box body 1, and two fans 204 are fixedly connected to the inner wall of the box body 1; when the installation of the control cabinet 8 and the maintenance of the transformer 6 are completed, then the protective doors 201 on the box body 1 are closed in sequence. Since heat dissipation nets 202 are installed on the protective doors 201, and at the same time, heat dissipation plates 203 are installed on the top of the box body 1, it is beneficial to the circulation of the air inside the box body 1. Cooperating with the fans 204 inside the box body 1, the oil temperature of the transformer 6 is effectively reduced, ensuring that the temperature inside the box body 1 always remains within the safe range.

[0041] When the present invention is in use, during the process of repairing the transformer 6 inside the device, in order to solve the problems that it is not convenient to wire the transformer 6 or disassemble the outer shell due to the limited internal space of the box body 1, just first stretch the body into the box body 1, then find the cover plate 503 on one of the guide rails 301, and then insert a screwdriver into the driving hole 506. At this time, the screwdriver presses down on the connecting plate 502, causing the connecting plate 502 to compress the spring 501 downward. At the same time, the connecting plate 502 drives the limiting block 504 at the end to slide downward. At this time, since one of the sliding sleeves 302 close to the outside is directly above the limiting block 504, the connecting plate 502 drives the limiting block 504 to slide out of the limiting groove 505. At this time, the limiting block 504 no longer blocks the sliding of the sliding sleeve 302 on the guide rail 301, thus facilitating the subsequent extraction of the transformer 6 from the inside of the box body 1. At the same time, the position of the transformer 6 is limited by the engagement of the sliding sleeve 302, preventing the transformer 6 from shifting under external vibration, improving flexibility. Remove the wiring on the transformer 6, and then pull the transformer 6 outward, so that the limiting block 504 is no longer engaged with the limiting groove 505 at the front end. During the process of pulling the transformer 6, the transformer 6 drives the two sliding frames 305 at the bottom to move outward. Since the first rack 407 and the second rack 408 are in a meshing state at this time, the sliding frame 305 drives the extension plate 304 and the connecting frame 303 at the bottom to move outward. The connecting frame 303 drives the two pairs of sliding sleeves 302 to slide outward along the guide rail 301 until the sliding sleeve 302 located inside slides directly above the limiting block 504. At this time, release the screwdriver, and the limiting block 504 slides upward under the reset action of the spring 501 until it is engaged with the limiting groove 505 directly above. At this time, the sliding sleeve 302 is effectively limited after the transformer 6 is pulled out a certain distance, thus improving stability. At the same time, by pulling the transformer 6 out a certain distance, the operation space for the staff is increased, avoiding the staff from reaching into the inside of the box body 1 for further repair, and improving the repair efficiency. If it is found that the operation space is still limited during the repair, just rotate the rotating handles 406 at both ends of the sliding frame 305. Then the rotating handle 406 drives the first lead screw 403 to rotate. Since the first lead screw 403 is threadedly connected to the sliding frame 305, the first lead screw 403 drives the driving block 401 at the bottom to slide downward along the inner wall of the sliding frame 305. At this time, the driving block 401 drives the roller 402 at the bottom to move downward. The same operation is repeated at the other end. At the same time, during the process of rotating the rotating handle 406, the first lead screw 403 drives the connecting bar 404 to move downward. The connecting bar 404 drives the sliding rod 405 at the other end to slide downward. The sliding rod 405 drives the driving block 401 and the roller 402 on the other sliding frame 305 to move downward. At this time, the four rollers 402 lift the sliding frame 305 upward by a certain distance, so that the first rack 407 at the end of the sliding frame 305 is no longer engaged with the second rack 408 on the extension plate 304.The position of the transformer 6 can be adjusted by rolling the roller 402 in the guiding groove 409. At this time, the transformer 6 is further pulled outwards by a certain distance, further increasing the operating space and facilitating the maintenance of the transformer 6. After the transformer 6 is further pulled outwards by a certain distance, the rotating handle 406 is rotated in the reverse direction to make the first rack 407 engage with the second rack 408 again, effectively limiting the position of the transformer 6. At the same time, through the engagement between the first rack 407 and the second rack 408, and the rolling of the roller 402 in the guiding groove 409, the rapid installation of the transformer 6 is realized, avoiding the use of bolts for fixation, solving the problem that it is difficult to tighten the bolts due to the limited operating space. At the same time, during the process of pushing the transformer 6 into the interior of the box body 1, the position of the transformer 6 can be adjusted quickly and arbitrarily, which is conducive to aligning the high-voltage bushing on the transformer 6 with the high-voltage bus or cable terminal head of the incoming line equipment, with strong flexibility;

[0042] When installing the control cabinet 8 inside the box body 1, first, the motor 709 at the bottom of the box body 1 drives the second lead screw 710 to rotate on the second support base 705. Since the end of the second lead screw 710 is threadedly connected to the driving plate 707, the second lead screw 710 drives the bottom plate 704 to slide outwards along the two guiding plates 711 through the driving plate 707. During the process of the bottom plate 704 sliding outwards, the connecting sleeves 703 at both ends of the bottom surface of the bottom plate 704 slide outwards along the first guiding rods 702. And since the two ends of the two first guiding rods 702 are fixed inside the box body 1 through the first support bases 701, the stability of the bottom plate 704 is improved. At the same time, since two driving sleeves 708 are installed at the central position of the bottom surface of the bottom plate 704, the two driving sleeves 708 are connected to the driving plate 707 through the two second guiding rods 706, and the second guiding rods 706 are supported by two pairs of second support bases 705. When the connecting sleeves 703 at both ends of the bottom plate 704 abut against the first support bases 701 near the outside, at this time, the bottom plate 704 has slid outwards from the box body 1 to the maximum extent. The second support base 705 cooperates with the second guiding rod 706 to support the central position of the bottom plate 704, avoiding the inclination of the outer section of the bottom plate 704 under the action of gravity, and further improving the stability of the bottom plate 704. At the same time, the control cabinet 8 is fixed on the bottom plate 704 through bolts, and then the output shaft of the motor 709 is rotated in the reverse direction to drive the bottom plate 704 together with the control cabinet 8 to slide into the interior of the box body 1, effectively solving the problem that it is difficult to insert the control cabinet 8 into the box body 1 due to the limited space inside the box body 1 and the small volume of the operation channel, simplifying the operation process and improving the installation efficiency;

[0043] After the installation of the control cabinet 8 and the maintenance of the transformer 6 are completed, the protective doors 201 on the box body 1 are then closed in sequence. Since heat dissipation nets 202 are installed on the protective doors 201, and at the same time, heat dissipation plates 203 are installed on the top of the box body 1, it is conducive to the circulation of the air inside the box body 1. In cooperation with the fan 204 inside the box body 1, the oil temperature of the transformer 6 can be effectively reduced, ensuring that the temperature inside the box body 1 always remains within a safe range.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0045] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Load tap-changing capacitance-adjustable charging pile box-type transformer, characterized in that, It includes a box body (1), a heat dissipation structure (2) installed on the box body (1), a sliding structure (3) arranged inside the box body (1), a fixing structure (4) connected to the sliding structure (3), a limiting structure (5) cooperating with the sliding structure (3), a transformer (6) installed on the sliding structure (3), a sliding-out structure (7) installed inside the box body (1), and a control cabinet (8) connected to the sliding-out structure (7); The sliding structure (3) includes two guide rails (301) and four sliding sleeves (302) slidably connected to the guide rails (301). The guide rails (301) are fixedly connected to the inside of the box body (1). A connecting frame (303) is fixedly connected between two symmetric sliding sleeves (302). Two extension plates (304) are fixedly connected between the two connecting frames (303). Two sliding frames (305) are arranged between the two extension plates (304). A transformer (6) is fixedly connected between the two sliding frames (305). The fixing structure (4) is fitted on the sliding frame (305); The fixing structure (4) includes a driving block (401) and a roller (402) rotatably connected to the driving block (401). The two ends of the sliding frame (305) are both slidably connected with the driving block (401). Guide grooves (409) are formed on the upper surfaces of the two extension plates (304). The roller (402) is rotatably connected to the guide groove (409). Two first lead screws (403) are threadedly connected to the sliding frame (305) near the outside. The bottoms of the two first lead screws (403) are respectively rotatably connected to the two driving blocks (401). One end of the other sliding frame (305) is respectively slidably connected with a sliding rod (405). The bottoms of the two sliding rods (405) are respectively fixedly connected to the other two driving blocks (401). A connecting bar (404) is fixedly connected to the top of each of the two sliding rods (405). The end of the connecting bar (404) is rotatably connected to the first lead screw (403). A second rack (408) is fixedly connected to the upper surface of one of the extension plates (304). A first rack (407) is fixedly connected to one end of each of the two sliding frames (305) near the second rack (408). The first rack (407) meshes with the second rack (408).

2. The on-load capacity-adjustable charging pile box-type transformer according to claim 1, characterized in that: A rotating handle (406) is fixedly connected to the top of the first lead screw (403). The rotating handle (406) is in an "L" - shaped structure.

3. The on-load adjustable capacity charging pile box-type transformer according to claim 1, characterized in that: The two first lead screws (403) are symmetrically arranged. The two connecting bars (404) are symmetrically arranged. The driving block (401) is in a "U" - shaped structure.

4. The on-load tap-changing and capacity-adjustable charging pile box-type transformer according to claim 1, wherein: The two guide rails (301) are symmetrically arranged. The connecting frame (303) and the sliding frame (305) are both in a "U" - shaped structure. One end of the extension plate (304) near the inside is in a "U" - shaped structure.

5. The on-load adjustable capacity charging pile box-type transformer according to claim 4, wherein: The limiting structure (5) includes two springs (501) and a connecting plate (502) fixedly connected between the two springs (501). Two springs (501) are fixedly connected inside one of the guide rails (301). The connecting plate (502) is slidably connected to the inner wall of the guide rail (301). A limiting block (504) is fixedly connected to one end of the connecting plate (502) near the inner side. Limiting grooves (505) are formed in both of the two sliding sleeves (302) close to the connecting plate (502).

6. The on-load tap-changing and capacity-adjustable charging pile box-type transformer according to claim 5, characterized in that: A cover plate (503) is arranged above the connecting plate (502). The cover plate (503) is fixedly connected to the guide rail (301). The end of the cover plate (503) is slidably connected to the limiting block (504). A driving hole (506) is formed in one end of the cover plate (503) away from the limiting block (504).

7. The on-load tap-changing and capacity-adjustable charging pile box-type transformer according to claim 1, wherein: The sliding-out structure (7) includes two pairs of first support seats (701) and a first guide rod (702) fixedly connected between two adjacent first support seats (701). Two pairs of first support seats (701) are fixedly connected inside the box body (1). A connecting sleeve (703) is slidably connected to each of the two first guide rods (702). A bottom plate (704) is fixedly connected between the two connecting sleeves (703). Three control cabinets (8) are fixedly connected to the bottom plate (704).

8. The on-load adjustable capacitance charging pile box-type transformer according to claim 7, wherein: Five second support seats (705) are arranged between the two first guide rods (702). The second support seats (705) are fixedly connected to the inner wall of the box body (1). A motor (709) is fixedly connected inside the box body (1). A second lead screw (710) is fixedly connected to the output shaft of the motor (709). The second lead screw (710) is rotatably connected to one of the second support seats (705). A driving plate (707) is fixedly connected to one end of the bottom plate (704). The driving plate (707) is threadedly connected to the second lead screw (710). Two driving sleeves (708) are fixedly connected to the other end of the bottom plate (704). A second guide rod (706) is fixedly connected to each of the two driving sleeves (708). The two second guide rods (706) are respectively slidably connected to the two pairs of second support seats (705) on the outer side. The end of the second guide rod (706) is fixedly connected to the driving plate (707).

9. The on-load tap-changing and capacity-adjustable charging pile box-type transformer according to claim 8, characterized in that: Two guide plates (711) are fixedly connected to the inner wall of the box body (1). The two guide plates (711) are slidably connected to the bottom plate (704). The driving plate (707) is in a "convex" shape structure.

10. The on-load adjustable capacity charging pile box-type transformer according to claim 1, wherein: The heat dissipation structure (2) includes a protective door (201) and a heat dissipation net (202) fixedly connected to the protective door (201). A plurality of protective doors (201) are rotatably connected to the outer wall of the box body (1). A plurality of heat dissipation plates (203) are fixedly connected to the top of the box body (1). Two fans (204) are fixedly connected to the inner wall of the box body (1).

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