Multi-pulse transformer

Abstract

The invention provides a multi-pulse transformer. The multi-pulse transformer comprises a shell, a first connecting assembly, a second connecting assembly, a transformer main body and a tap switch, the first connecting assembly is installed at the bottom of the inner wall of the shell. The second connecting assembly is installed on the top of the inner wall of the shell. The transformer main body is located in the shell, connecting frames are arranged at the upper end and the lower end of the transformer main body respectively, and the two connecting frames are connected with the first connecting assembly and the second connecting assembly respectively; the tap switch is installed on the side face of the transformer body. According to the multi-pulse transformer, the tap switch is installed on the side face of the transformer body, a traditional cage type switch installed below a box cover on the top of the shell is replaced, a vertical space for switch installation does not need to be reserved between the top of the shell and the body, the overall height of the transformer is directly compressed, and the height limitation requirement of ocean transportation is met; and the transportation scheme adjustment cost caused by height exceeding is avoided.

Description

Technical Field

[0001] This application belongs to the field of transformer technology, specifically relating to a multi-pulse transformer. Background Technology

[0002] The 36-pulse transformer is a multi-pulse rectifier transformer. As a core power supply device in high-voltage and high-power scenarios, it is widely used in industrial frequency converters, rail transit traction power supply and other fields due to its excellent harmonic suppression capability and power stability.

[0003] To achieve a 36-pulse synthesized output, the secondary side of the transformer requires 6-12 sets of independent phase-shifting windings. Each set of windings needs to be stacked in layers with reserved insulation layers and oil channels, resulting in a significant increase in the total height of the windings. Simultaneously, the multi-terminal structure corresponding to multiple windings requires more vertical assembly space, both of which contribute to the overall height of the transformer being higher than that of traditional transformers. In ocean shipping scenarios, the unavoidable turbulence and swaying during ship voyages will cause the 36-pulse transformer to oscillate continuously. Long-term oscillation will subject the transformer's fasteners to repeated mechanical impacts, gradually causing them to loosen, fatigue, and wear, affecting stability during transport. If the fasteners fail, the transformer will experience violent shaking or even displacement, potentially leading to broken internal winding leads, damaged insulation layers, and irreversible damage such as short circuits and breakdowns. It may also cause damage to the transport vehicle due to collisions with the ship's structure, resulting in transport delays, high costs for equipment repair or replacement, and serious economic losses and schedule risks to project progress. Summary of the Invention

[0004] This application provides a multi-pulse transformer, which aims to solve the technical problem that the height of the pulse transformer in the prior art is higher than that of the traditional transformer, and it is easy to shake during ocean transportation, affecting stability and safety.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A multi-pulse transformer is provided, comprising: shell; The first connecting component is installed on the bottom of the inner wall of the housing; The second connecting component is installed on the top of the inner wall of the housing; The transformer body is located inside the outer casing. Connecting brackets are provided at both the upper and lower ends of the transformer body, and the two connecting brackets are respectively connected to the first connecting assembly and the second connecting assembly; and The tap changer is installed on the side of the transformer body.

[0006] In one possible implementation, the housing includes: A box with an open top, the first connecting assembly being mounted on the bottom surface of its inner cavity; and The upper box cover is placed on the top of the box body, and the upper box cover is provided with the second connecting component.

[0007] In one possible implementation, multiple first connecting components are provided and evenly distributed at the bottom of the transformer body, each first connecting component comprising: An irregularly shaped rod is installed at the bottom of the inner cavity of the outer shell. The connecting frame located at the bottom of the transformer body has an irregularly shaped hole corresponding to the irregularly shaped rod, and the irregularly shaped rod is inserted into the irregularly shaped hole. A fixing plate has a connecting hole corresponding to the irregularly shaped rod, the connecting hole being inserted into the irregularly shaped rod; and a fixing hole is provided on the fixing plate. Fasteners are connected to the connecting bracket by passing through the fixing holes.

[0008] In one possible implementation, the transformer body further includes: A left vessel body and a right vessel body are arranged at a distance along the horizontal direction, and the left vessel body and the right vessel body are respectively connected to the first connecting component and the second connecting component; The left and right devices can each output 18 pulses, and the pulses output by the two devices are superimposed by an external circuit to form 36 pulses.

[0009] In one possible implementation, the second connection component includes: Multiple first supports are respectively disposed at the top of the inner cavity of the outer shell, and the first supports are connected to the left body or the right body; and The second bracket is located at the top of the inner cavity of the outer shell, and the second bracket is simultaneously connected to either the left body or the right body.

[0010] In one possible implementation, the first support includes: A connecting cylinder is installed on the top of the inner cavity of the outer shell. The top of the connecting cylinder is open and communicates with the outside. A connecting groove is provided in the middle of the bottom end of the connecting cylinder. A threaded sleeve is provided in the connecting groove. The inner ring of the threaded sleeve has an internal thread. A connecting rod, the bottom of which is rotatably connected to the top of the transformer body, the top of which has an external thread that engages with the internal thread; and A nut is fitted onto the connecting rod and screwed to it, with the nut abutting against the threaded sleeve from above and below.

[0011] In one possible implementation, the tap changer is a three-phase drum-shaped vertical tube switch; Two tap switches are provided and are respectively installed on the side of the left body.

[0012] In one possible implementation, the bottom of the inner cavity of the housing is further provided with several pads, the top of which abuts against the bottom of the transformer body.

[0013] In one possible implementation, the pad includes: The base is installed at the bottom of the inner cavity of the outer casing; An elastic element is mounted on the top of the base; and An abutment block is installed on the top of the elastic member, the abutment block abuts against the transformer body, and the elastic member is configured with a preload force to push the abutment block upward.

[0014] In one possible implementation, a plurality of the pads are arranged in a circular array at equal intervals, the pads comprising: A lower connecting block is installed at the bottom of the inner cavity of the outer casing, and a mating groove is formed on the inner side of the top of the lower connecting block; and The upper connecting block is installed at the bottom of the transformer body, and the lower connecting block has a docking protrusion corresponding to the docking groove, which docks with the docking groove vertically.

[0015] Compared with the prior art, the multi-pulse transformer provided in this application firstly installs the first connecting component on the bottom of the inner wall of the housing and the second connecting component on the top of the inner wall of the housing. Then, the transformer body is hoisted into the housing, and the connecting frames at the upper and lower ends of the body are aligned with the first and second connecting components, respectively. They are then fixed by bolts, clips, etc., to achieve vertical positioning of the transformer body inside the housing. Finally, the tap changer is installed on the side of the transformer body by bolts or welding, avoiding the connecting frame and winding area, to complete the overall structural assembly. After assembly, the tap changer can normally realize the voltage tap adjustment function. The tap changer is installed on the side of the transformer body, replacing the traditional cage-type switch installed under the top cover of the casing. This eliminates the need for vertical space between the top of the casing and the main body for switch installation, directly reducing the overall height of the transformer. This adapts to the height restrictions of ocean shipping, avoiding the cost of adjusting transportation plans due to exceeding height limits. The bidirectional fixing structure of the top second connecting component and the bottom first connecting component constrains the transformer body within the casing. This bidirectional fixing disperses the mechanical impact generated by swaying, effectively counteracting the reciprocating swaying caused by ship rolling, reducing fatigue wear of the fixing components, and preventing transformer body displacement caused by fixing component failure. Modular assembly improves production efficiency, reduces the risk of equipment short circuits and breakdowns due to transportation damage, and reduces maintenance and replacement costs and project delays. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main structure of a multi-pulse transformer provided in an embodiment of this application; Figure 2 This is a schematic diagram of the outer casing used in one embodiment of this application; Figure 3 This is a top view of the structure of the first connecting component used in another embodiment of this application; Figure 4 This is a schematic diagram of the structure of the first bracket used in another embodiment of this application; Figure 5 This is a schematic diagram of the structure of the pad used in another embodiment of this application; Figure 6 Here is a front view of the structure of the pad used in another embodiment of this application; Figure 7 This application also provides a top view of the distribution of pad blocks used in another embodiment.

[0018] Explanation of reference numerals in the attached figures: 1. Outer shell; 11. Box body; 12. Top cover; 2. First connecting assembly; 21. Irregularly shaped rod; 22. Fixing piece; 23. Fastener; 3. Second connecting assembly; 31. First bracket; 311. Connecting cylinder; 312. Connecting rod; 313. Nut; 32. Second bracket; 4. Transformer body; 41. Left transformer body; 42. Right transformer body; 5. Tap changer; 6. Pad; 61. Base; 62. Elastic element; 63. Abutment block; 64. Lower connecting block; 65. Upper connecting block. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0025] Please refer to the following: Figures 1 to 7 The multi-pulse transformer provided in this application will now be described. The multi-pulse transformer includes a housing 1, a first connecting component 2, a second connecting component 3, a transformer body 4, and a transformer body 4. The first connecting component 2 is installed on the bottom of the inner wall of the housing 1; the second connecting component 3 is installed on the top of the inner wall of the housing 1; the transformer body 4 is located inside the housing 1, and connecting brackets are respectively provided at the upper and lower ends of the transformer body 4, and the two connecting brackets are respectively connected to the first connecting component 2 and the second connecting component 3; a tap changer 5 is installed on the side of the transformer body 4.

[0026] It should be noted that the vertical height of the multi-pulse transformer in this embodiment is lower than that of traditional transformers, which can avoid excessive center of gravity during ocean transportation.

[0027] It should be noted that metal connecting frames are respectively installed at the upper and lower ends of the transformer body 4 (see...). Figure 2 The four cuboids in the diagram have two connecting brackets that are respectively connected to the transformer body 4. These connecting brackets are mechanically connected to the outer casing 1 to protect the transformer body 4. The specific details of how the connecting brackets connect to the transformer body 4 are common knowledge in this field and will not be elaborated upon here.

[0028] In specific implementation, firstly, the first connecting component 2 is installed on the bottom of the inner wall of the outer casing 1, and the second connecting component 3 is installed on the top of the inner wall of the outer casing 1. Then, the transformer body 4 is hoisted into the outer casing 1, so that the connecting frames at the upper and lower ends of the body are aligned with the first connecting component 2 and the second connecting component 3 respectively, and fixed by bolts, buckles, etc., to achieve vertical positioning of the transformer body 4 in the outer casing 1. Finally, the tap changer 5 is installed on the side of the transformer body 4 by bolts or welding, avoiding the connecting frame and winding area, to complete the overall structural assembly. After assembly, the tap changer 5 can normally realize the voltage tap adjustment function.

[0029] Compared with existing technologies, the multi-pulse transformer provided in this embodiment features a tap changer 5 mounted on the side of the transformer body 4, replacing the traditional cage-type switch mounted below the top cover of the outer casing 1. This eliminates the need for vertical space between the top of the outer casing 1 and the main body for switch installation, directly reducing the overall height of the transformer. This adapts to the height restrictions of ocean shipping, avoiding the cost of adjusting transportation plans due to excessive height. The transformer body 4 is constrained within the outer casing 1 by a bidirectional fixing structure of the top second connecting component 3 and the bottom first connecting component 2. This bidirectional fixing disperses the mechanical impact generated by swaying, effectively counteracting the reciprocating swaying caused by ship turbulence, reducing fatigue wear of the fixing components, and preventing displacement of the transformer body 4 caused by component failure. Modular assembly improves production efficiency, reduces the risk of equipment short circuits and breakdowns due to transportation damage, and reduces maintenance and replacement costs and project delays.

[0030] In some embodiments, see Figure 2 The outer casing 1 includes a box body 11 with a top opening and an upper box cover 12. A first connecting component 2 is installed on the bottom surface of the inner cavity of the box body 11; the upper box cover 12 is placed on the top of the box body 11, and a second connecting component 3 is provided on the upper box cover 12.

[0031] In practice, the second connecting component 3 is installed on the lower surface of the upper cover 12 to ensure that the second connecting component 3 and the first connecting component 2 are aligned vertically. Then, the transformer body 4 is hoisted into the inner cavity of the enclosure 11, and the bottom connecting frame of the body is fixed to the first connecting component 2. Finally, the upper cover 12 is placed on top of the enclosure 11, and the enclosure 11 and the upper cover 12 are sealed together by fasteners such as bolts 23. At the same time, the second connecting component 3 on the upper cover 12 is fixed to the top connecting frame of the body, forming a closed outer shell 1 structure.

[0032] The housing 1 provided in this embodiment adopts a split design, which improves the ease of assembly. The housing 11 and the upper cover 12 are processed and installed separately. The operator can first fix the bottom of the main body inside the housing 11, and then fix the top through the upper cover 12. This provides a wider field of vision and reduces assembly errors. The closed housing 11 and upper cover 12 can isolate seawater moisture, dust and other impurities during ocean transportation, prevent the insulation layer of the internal windings from getting damp and damaged, and extend the service life of the equipment. As a bottom support structure, the housing 11 can enhance the resistance to external impacts and reduce the direct impact of ship swaying on the main body. By adjusting the height of the housing 11 and the position of the upper cover 12 components, diverse production needs can be met, indirectly reducing customization costs.

[0033] In some embodiments, see Figure 1 and Figure 3Multiple first connecting components 2 are provided and evenly distributed at the bottom of the transformer body 4. Each first connecting component 2 includes a shaped rod 21, a fixing plate 22, and a fastener 23. The shaped rod 21 is installed at the bottom of the inner cavity of the outer shell 1. The connecting frame at the bottom of the transformer body 4 has a shaped hole corresponding to the shaped rod 21, and the shaped rod 21 is inserted into the shaped hole. The fixing plate 22 has a connecting hole corresponding to the shaped rod 21, and the connecting hole is inserted into the shaped rod 21. The fixing plate 22 has a fixing hole. The fastener 23 passes through the fixing hole and is connected to the connecting frame.

[0034] In specific implementation, firstly, according to the size of the bottom connecting frame of the transformer body 4, process a corresponding number of irregular rods 21, and vertically install the irregular rods 21 at the bottom of the inner cavity of the outer shell 1, ensuring that all irregular rods 21 are evenly distributed around the bottom of the body; then, process irregular holes on the connecting frame at the bottom of the transformer body 4 that perfectly match the shape and size of the irregular rods 21, align the irregular holes of the connecting frame with the irregular rods 21 and insert them downwards to achieve the initial positioning of the body; then process fixing plates 22 with connecting holes, so that the size of the connecting holes matches the irregular rods 21, align the connecting holes of the fixing plates 22 with the irregular rods 21 and fit them in until the fixing plates 22 are attached to the top surface of the connecting frame; finally, pass the fasteners 23 through the fixing holes on the fixing plates 22 and screw them into the pre-set threaded holes of the connecting frame to complete the fastening of the fixing plates 22 and the connecting frame, achieving double fixation of the bottom of the transformer body 4.

[0035] It should be noted that the irregular rod 21 can be a triangular prism or a hexagonal prism, as long as it can restrict the rotation of the irregular rod 21.

[0036] It should be noted that the fastener 23 uses a bolt and two fixing nuts. The bolt passes through the fixing hole and the connecting bracket, and the two fixing nuts are screwed to the bolt from both ends, which can realize the positioning of the fixing piece 22.

[0037] The first connecting component 2 provided in this embodiment significantly improves the reliability of preventing loosening during transportation. The non-circular fit between the irregularly shaped rod 21 and the irregularly shaped hole restricts the horizontal rotation of the irregularly shaped rod 21, preventing circumferential loosening caused by bumps. The secondary fixing of the fixing plate 22 and the fastener 23 further locks the position of the transformer body 4. Even if the irregular fit experiences slight wear, the fastener 23 can still maintain the stability of the transformer body 4. Multiple evenly distributed first connecting components 2 can distribute the weight of the transformer body 4 to the bottom of the outer casing 1, avoiding component breakage caused by excessive force at a single point. At the same time, the vertical support structure of the irregularly shaped rod 21 can enhance the resistance to vertical bumps, reduce the vertical movement of the transformer body 4, protect the internal winding insulation layer from tearing, reduce the risk of equipment short circuits and breakdowns, and provide a stable bottom fixation guarantee for ocean transportation.

[0038] As another embodiment of the first connecting component 2, the first connecting component includes a plurality of threaded fasteners that screw the transformer body 4 and the housing 1 together.

[0039] In some embodiments, see Figure 1 The transformer body 4 also includes a left transformer body 41 and a right transformer body 42, which are spaced apart in the horizontal direction. The left transformer body 41 and the right transformer body 42 are respectively connected to the first connecting component 2 and the second connecting component 3. The left transformer body 41 and the right transformer body 42 can each output 18 pulse waves, and the pulse waves output by the two are superimposed by the external circuit to form 36 pulse waves.

[0040] In this embodiment, each of the left transformer body 41 and the right transformer body 42 requires only 6 sets of windings, significantly reducing the height of a single transformer body. Combined with the horizontal spacing arrangement, the overall transformer height can be reduced by more than 30%, perfectly adapting to the height restrictions of ocean shipping. Each of the two transformer bodies independently outputs 18 pulses, which can reduce electromagnetic interference between multiple windings in a single transformer body, improve the stability of the pulse waveform, and thus enhance harmonic suppression capability, meeting the power quality requirements of high-voltage and high-power scenarios. The left transformer body 41 and the right transformer body 42 are each fixed by the second connecting component 3 and the first connecting component 2, avoiding the problem of excessive load on the fixing components due to the excessive weight of a single transformer body. At the same time, the horizontal spacing can prevent the left transformer body 41 and the right transformer body 42 from colliding with each other during transportation, reducing the risk of internal winding lead breakage.

[0041] In some embodiments, see Figure 1 The second connecting assembly 3 includes a plurality of first supports 31 and a second support 32. The plurality of first supports 31 are respectively disposed at the top of the inner cavity of the outer shell 1, and the first supports 31 are connected to the left body 41 or the right body 42; the second supports 32 are disposed at the top of the inner cavity of the outer shell 1, and the second supports 32 are simultaneously connected to the left body 41 or the right body 42.

[0042] The specific implementation involves first determining the number and position of the first bracket 31 and the second bracket 32, and then installing multiple first brackets 31 on the top of the inner cavity of the outer shell 1. Some of the first brackets 31 correspond to the top connecting frame position of the left body 41, and the remaining first brackets 31 correspond to the top connecting frame position of the right body 42. Then, the cross-connecting second brackets 32 are processed so that the length of the second brackets 32 matches the horizontal spacing of the left body 41 and the right body 42. The second brackets 32 are installed on the top of the inner cavity of the outer shell 1, and their two ends cover the top connecting frames of the left body 41 and the right body 42, respectively. Finally, the top connecting frame of the left body 41 is fixed to one end of the corresponding first bracket 31 and the second bracket 32 ​​using fasteners 23 such as bolts, and the top connecting frame of the right body 42 is fixed to the other end of the corresponding first bracket 31 and the second bracket 32.

[0043] The second connecting component 3 provided in this embodiment improves the stability of the top of the left hull 41 and the right hull 42 through a design of distributed support and overall reinforcement. Multiple first supports 31 provide individual support for the left hull 41 and the right hull 42, distributing the weight of the left hull 41 and the right hull 42 to multiple support points, preventing bending or breakage of supports due to excessive force at a single point. The bridging design of the second support 32 connects the left hull 41 and the right hull 42 into a whole, reducing relative displacement of the left hull 41 and the right hull 42 during transportation, preventing breakage of external circuit wiring due to misalignment of the left hull 41 and the right hull 42, and ensuring the continuity of pulse synthesis. The first supports 31 and the second supports 32 form a mesh support structure, enhancing the connection rigidity between the top of the outer shell 1 and the left hull 41 and the right hull 42, effectively counteracting the tensile force generated by the lateral sway of the hull, preventing deformation of the top connecting frame of the left hull 41 and the right hull 42, and protecting the internal windings from external pressure. The distributed layout of the first bracket 31 and the second bracket 32 ​​facilitates wiring within the outer casing 1, reduces interference between wiring and the first bracket 31 and the second bracket 32, improves assembly efficiency, indirectly reduces the production cycle, and saves time and costs for project progress.

[0044] In some embodiments, see Figure 4 The first support 31 includes a connecting cylinder 311, a connecting rod 312, and a nut 313. The connecting cylinder 311 is installed at the top of the inner cavity of the outer casing 1. The top of the connecting cylinder 311 is open and communicates with the outside. A connecting groove is formed in the middle of the bottom end of the connecting cylinder 311, and a threaded sleeve is installed in the groove. The inner ring of the threaded sleeve has internal threads. The bottom of the connecting rod 312 is rotatably connected to the top of the transformer body 4. The top of the connecting rod 312 has external threads, which engage with the internal threads. The nut 313 is sleeved on the connecting rod 312 and screwed to it. The nut 313 abuts against the threaded sleeve. Working Principle / Usage Steps In this embodiment, the top of the connecting rod 312 is aligned with the threaded sleeve at the bottom of the connecting cylinder 311. The connecting rod 312 is rotated clockwise to engage the external thread with the internal thread of the threaded sleeve. The depth of the connecting rod 312 inserted into the threaded sleeve is adjusted by rotation, thereby adjusting the top height of the transformer body 4 until the position of the transformer body 4 is adapted to the bottom first connecting component 2. Finally, the nut 313 is fitted onto the connecting rod 312, and the nut 313 is rotated clockwise to make the bottom surface of the nut 313 tightly abut against the top surface of the threaded sleeve, locking the position of the connecting rod 312 and preventing the threads from loosening due to vibration during transportation.

[0045] The first bracket 31 provided in this embodiment can be length-adjusted. The height of the main body can be finely adjusted by rotating the connecting rod 312 to adapt to transformer bodies 4 of different sizes, improving assembly compatibility. The tight-fitting design of the nut 313 and the threaded sleeve can prevent the threads from stripping due to vibration during transportation. Even with long-term bumps, the nut 313 can still maintain a locked state, preventing the main body from shifting in the height direction and protecting the internal winding leads from being stretched and broken. The rotating connection design at the bottom of the connecting rod 312 prevents the main body from rotating with it during adjustment, protecting the fixed structure between the bottom of the main body and the first connecting component 2 from being damaged and improving equipment safety during maintenance.

[0046] As another embodiment of the first support 31, the first support has multiple threaded rods and a threaded plate. The threaded plate is connected to the top of the transformer body 4, and the threaded plate is screwed to the multiple threaded rods to achieve positioning of the threaded rods and the threaded plate. The second support 32 has the same structure as the first support 31. The threaded plate in the second support 32 is connected to both the left transformer body 41 and the right transformer body 42.

[0047] In some embodiments, see Figure 1 Tap changer 5 is a three-phase drum-shaped vertical tube switch; two tap changers 5 are provided, and are respectively installed on the side of the left body 41. Working principle / usage steps The tap changer 5 used in this embodiment is a three-phase drum-shaped vertical tube switch, with a volume only 1 / 3 that of a traditional cage-type switch. Installed on the side of the left transformer body 41, it does not occupy the vertical space between the top of the outer casing 1 and the left and right transformer bodies 41 and 42, directly reducing the overall height of the transformer and making the equipment adaptable to the height restrictions of ocean-going containers. From the perspective of linkage reliability, the two tap changers 5 are centrally installed on the side of the left transformer body 41, reducing linkage failures caused by relative displacement between the left and right transformer bodies 41 and 42, improving tap adjustment accuracy, and thus ensuring the stability of the 18-pulse output, providing a reliable foundation for 36-pulse synthesis. With the switches centrally installed on the side of the left transformer body 41, personnel can complete maintenance from one side within the outer casing 1 without frequent movement between the left and right transformer bodies 41 and 42, improving maintenance efficiency.

[0048] In some embodiments, see Figure 1The bottom of the inner cavity of the outer casing 1 is also equipped with several pads 6, the tops of which abut against the bottom of the transformer body 4. The even distribution of the pads 6 can distribute the weight of the transformer body 4 to multiple points on the bottom of the outer casing 1, avoiding deformation caused by excessive local stress on the bottom of the transformer body 4, protecting the internal iron core and windings from compression damage, and extending the service life of the equipment. From the perspective of horizontal calibration, the pads 6 can serve as height compensation components. If there are manufacturing unevenness or installation errors on the bottom of the outer casing 1, the levelness of the transformer body 4 can be adjusted by replacing the pads 6 with pads of different thicknesses, avoiding uneven stress on the internal winding leads caused by the body tilting, and ensuring the stability of pulse output. The pads 6 can also absorb slight vertical bumps, reducing the direct impact of vibration on the transformer body 4, indirectly improving the service life of the fasteners, reducing the risk of fastener loosening, and providing an additional protective barrier for ocean shipping.

[0049] In some embodiments, see Figure 5 The pad 6 includes a base 61, an elastic element 62, and an abutment block 63. The base 61 is installed at the bottom of the inner cavity of the housing 1; the elastic element 62 is installed at the top of the base 61; the abutment block 63 is installed at the top of the elastic element 62, and the abutment block 63 abuts against the transformer body 4. The elastic element 62 is configured with a preload force to push the abutment block 63 upward.

[0050] Optionally, the elastic element 62 can be a disc spring or a coil spring, as long as it can provide a buffering force between the abutment block 63 and the base 61. By pre-compressing the elastic element 62, the abutment block 63 has an upward preload; when the transformer body 4 is hoisted to the top of the abutment block 63, the weight of the body further compresses the elastic element 62 until the bottom of the body is tightly fitted with the abutment block 63. The preload of the elastic element 62 continues to act upward on the body, forming an elastic support.

[0051] In this embodiment, the elastic element 62 can effectively absorb impact energy. For example, when the ship is rocking up and down, the elastic element 62 reduces the rigid collision between the transformer body 4 and the outer shell 1 by transmitting the compression or elongation buffer force, protecting the internal winding insulation layer from being torn and reducing the risk of short circuit. The pre-tightening force of the elastic element 62 ensures that the abutment block 63 is always tightly attached to the bottom of the transformer body 4, preventing the transformer body 4 from moving up and down due to vibration during transportation and preventing the top connecting frame from detaching from the second connecting assembly 3. At the same time, the pre-tightening force can compensate for the expansion and contraction of the transformer body 4 due to temperature changes, maintain the stability of the transformer body 4 position, and improve long-term reliability.

[0052] In some embodiments, see Figure 7 and Figure 6A number of pads 6 are arranged in a circular array at equal intervals. Each pad 6 includes a lower connecting block 64 and an upper connecting block 65. The lower connecting block 64 is installed at the bottom of the inner cavity of the outer shell 1, and a mating groove is provided on the inner side of the top of the lower connecting block 64. The upper connecting block 65 is installed at the bottom of the transformer body 4, and a mating protrusion is provided on the lower connecting block 64 corresponding to the mating groove. The mating protrusion and the mating groove are mated vertically.

[0053] In practice, the number of pads 6 is determined based on the bottom diameter of the transformer body 4, and the installation positions of the pads 6 are marked on the bottom of the inner cavity of the outer shell 1 in a circular array with equal spacing. Then, the lower connecting block 64 and the upper connecting block 65 are machined. A mating groove is machined on the top inner side of the lower connecting block 64, and a mating protrusion matching the shape and size of the mating groove is machined on the bottom of the upper connecting block 65. Then, the lower connecting block 64 is fixed to the marked position on the bottom of the inner cavity of the outer shell 1 with bolts, and the upper connecting block 65 is fixed to the bottom of the transformer body 4 by welding or bolts, ensuring that the upper connecting block 65 and the lower connecting block 64 are aligned in the vertical direction. Finally, the body is hoisted into the outer shell 1, so that the mating protrusion of the upper connecting block 65 is aligned with the mating groove of the lower connecting block 64, and the body is slowly lowered until the mating protrusion is fully inserted into the mating groove, completing the bottom positioning and support.

[0054] In this embodiment, the engagement of the protrusion and the groove forces the transformer body 44 to be centered within the outer casing 1, ensuring the concentricity of the transformer body 4 and the outer casing 1, reducing collisions with the inner wall of the outer casing 1 caused by the displacement of the transformer body 4, and protecting the appearance and structural integrity of the equipment. The circular array arrangement ensures that the weight of the transformer body 4 is evenly distributed on the circumference of the bottom of the outer casing 1, avoiding deformation of the bottom of the outer casing 1 due to excessive local stress, and enhancing the load-bearing capacity of the outer casing 1. The circumferentially distributed support points can effectively counteract the centrifugal force generated by the lateral sway of the hull, reduce the lateral displacement of the transformer body 4, protect the internal winding leads from being pulled and broken, and eliminate the need for repeated calibration of the position of the transformer body 4 during assembly, allowing workers to quickly complete the positioning and improve assembly efficiency.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-pulse transformer, characterized in that, include: Outer shell (1); The first connecting component (2) is installed on the bottom of the inner wall of the outer casing (1); The second connecting component (3) is installed on the top of the inner wall of the housing (1); The transformer body (4) is located inside the outer casing (1). Connecting frames are provided at the upper and lower ends of the transformer body (4), and the two connecting frames are respectively connected to the first connecting assembly (2) and the second connecting assembly (3); and The tap changer (5) is installed on the side of the transformer body (4).

2. The multi-pulse transformer as described in claim 1, characterized in that, The outer casing (1) includes: A box (11) with an open top, the first connecting assembly (2) is mounted on the bottom surface of the inner cavity; and The upper box cover (12) is placed on the top of the box body (11), and the upper box cover (12) is provided with the second connecting component (3).

3. The multi-pulse transformer as described in claim 1, characterized in that, The first connecting component (2) is provided in multiple forms and is evenly distributed at the bottom of the transformer body (4). Each first connecting component (2) includes: The irregular rod (21) is installed at the bottom of the inner cavity of the outer shell (1). The connecting frame at the bottom of the transformer body (4) has an irregular hole corresponding to the irregular rod (21). The irregular rod (21) is inserted into the irregular hole. A fixing plate (22) is provided with a connecting hole corresponding to the irregular rod (21), the connecting hole being inserted into the irregular rod (21), and a fixing hole is provided on the fixing plate (22); and Fastener (23) passes through the fixing hole and is connected to the connecting bracket.

4. The multi-pulse transformer as described in claim 1, characterized in that, The transformer body (4) also includes: A left vessel body (41) and a right vessel body (42) are arranged at a distance along the horizontal direction. The left vessel body (41) and the right vessel body (42) are respectively connected to the first connecting component (2) and the second connecting component (3). The left body (41) and the right body (41) can each output 18 pulse waves, and the pulse waves output by the two are superimposed by the external circuit to form 36 pulse waves.

5. The multi-pulse transformer as described in claim 4, characterized in that, The second connection component (3) includes: Multiple first supports (31) are respectively disposed at the top of the inner cavity of the outer shell (1), and the first supports (31) are connected to the left body (41) or the right body (42); and The second bracket (32) is located at the top of the inner cavity of the outer shell (1), and the second bracket (32) is connected to either the left body (41) or the right body (42).

6. The multi-pulse transformer as described in claim 5, characterized in that, The first support (31) includes: A connecting cylinder (311) is installed on the top of the inner cavity of the outer shell (1). The top of the connecting cylinder (311) is open and the opening communicates with the outside. A connecting groove is provided in the middle of the bottom end of the connecting cylinder (311). A threaded sleeve is provided in the connecting groove. The inner ring of the threaded sleeve has an internal thread. A connecting rod (312) is rotatably connected at its bottom to the top of the transformer body (4). The top of the connecting rod (312) has an external thread that engages with the internal thread. A nut (313) is fitted onto the connecting rod (312) and screwed onto the connecting rod (312). The nut (313) abuts against the threaded sleeve from top to bottom.

7. The multi-pulse transformer as described in claim 4, characterized in that, The tap changer (5) is a three-phase drum-shaped vertical tube type switch; Two tap switches (5) are provided and are respectively installed on the side of the left body (41).

8. The multi-pulse transformer as described in claim 1, characterized in that, The bottom of the inner cavity of the outer shell (1) is also provided with several pads (6), the top of the pads (6) abutting against the bottom of the transformer body (4).

9. The multi-pulse transformer as described in claim 8, characterized in that, The pad (6) includes: The base (61) is installed at the bottom of the inner cavity of the outer casing (1); An elastic element (62) is mounted on top of the base (61); and An abutment block (63) is installed on the top of the elastic member (62). The abutment block (63) abuts against the transformer body (4). The elastic member (62) is configured with a preload force to push the abutment block (63) upward.

10. The multi-pulse transformer as described in claim 8, characterized in that, A plurality of the pads (6) are arranged in a circular array at equal intervals, the pads (6) comprising: A lower connecting block (64) is installed at the bottom of the inner cavity of the outer shell (1), and a mating groove is provided on the inner side of the top of the lower connecting block (64); and The upper connecting block (65) is installed at the bottom of the transformer body (4), and the lower connecting block (64) has a docking protrusion corresponding to the docking groove, and the docking protrusion docks with the docking groove vertically.

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