Low-voltage side cable outgoing line type energy-saving traction transformer structure

Abstract

This invention discloses a low-voltage side cable-outlet type energy-saving traction transformer structure, relating to the field of traction transformer technology. The device comprises a main body and two cylindrical sections. Two lifting seats are fixedly installed on the main body, and low-voltage bushings are fixedly installed on each of the two lifting seats. Conductive copper plates are fixedly installed at the lower ends of both cylindrical sections, and each conductive copper plate is threaded onto its corresponding low-voltage bushing. Multiple fixing rods are fixedly installed on the inner walls of both cylindrical sections. This invention enables direct connection between external cables and low-voltage outgoing terminals. Simultaneously, through the cooperation of multiple copper braids and copper foil flexible connections, it can efficiently absorb locomotive running vibrations and short-circuit electromagnetic shocks, improving the stability and safety of continuous conductivity. Furthermore, through a pushing mechanism, the number of conductive copper braids can be increased or decreased as needed, enhancing the device's adaptability and versatility.

Description

Technical Field

[0001] This invention relates to the field of traction transformer technology, and in particular to a structure of an energy-saving traction transformer with a low-voltage side cable outlet. Background Technology

[0002] As the core equipment of intelligent large-scale DC converter transformers in the smart grid industry, intelligent traction transformers are the key carriers of traction power supply systems. Their working principle is to convert high-voltage side electrical energy into low-voltage side high-current electrical energy through electromagnetic induction effect. The low-voltage side winding needs to collect thousands of amperes of current and transmit it to the outside through the outgoing terminal to meet the high-power power supply needs of scenarios such as rail transit and DC power distribution. However, because the current that the low-voltage side needs to carry is extremely large (up to thousands of amperes), when the terminals of the external cable are directly connected to the low-voltage outgoing terminal, they cannot withstand the strong heat effect and electromagnetic impact force brought about by the conduction of large current. At the same time, they lack sufficient current sharing and mechanical buffering capabilities, which can easily lead to safety hazards such as stress concentration and joint breakage. Therefore, the industry has long used rigid hard copper busbars as transition current busbars to complete the current conduction, mechanical support and current sharing compensation between the low-voltage bushing and the external cable. However, in actual current collection and conduction processes, the solid rigid structure of the hard copper busbar has weak vibration resistance. Under continuous operation of locomotives or strong electromagnetic shock environments, it is prone to stress fatigue fracture. At the same time, the fixed cross-section and rigid shape of the hard copper busbar cannot adapt to the load requirements of different power levels, which can easily reduce the reliability and flexible adaptability of the traction transformer to ensure continuous and stable operation. To address these issues, we propose a low-voltage side cable-out type energy-saving traction transformer structure. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art by proposing a low-voltage side cable-out type energy-saving traction transformer structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A low-voltage side cable-out type energy-saving traction transformer structure includes a main body and two cylinders. Two lifting seats are fixedly installed on the main body, and low-voltage bushings are fixedly installed on both lifting seats. Conductive copper plates are fixedly installed at the lower ends of both cylinders, and the two conductive copper plates are threaded onto the corresponding low-voltage bushings. Multiple fixing rods are fixedly installed on the inner walls of both cylinders. Copper end plates are fixedly installed on each fixing rod. Copper braided parts are fixedly installed between the two copper end plates. The copper braided parts are made of multiple strands of high-purity copper braided wire through a cold pressing process. Support rods are fixedly installed on the inner walls of both cylinders in a ring-shaped even distribution. Constraint frames are fixedly installed on each support rod, and the constraint frames are fixedly installed on the corresponding copper braided parts. Copper foil flexible connectors are fixedly installed on the copper end plates. The copper foil flexible connectors are made of high-purity copper foil sheets that are evenly distributed in a linear shape and are stacked together. Each copper foil flexible connector is equipped with a plug-in mechanism. Heat dissipation components for heat dissipation of the corresponding copper braids are installed in both cylinders.

[0005] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, each of the multiple plugging and unplugging mechanisms includes a connecting terminal, and the connecting terminal is fixedly installed on the corresponding copper foil flexible connection. Each connecting terminal has a sliding groove, and each sliding groove is equipped with a lifting component.

[0006] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, each of the multiple lifting components includes a plug, and the plug is slidably installed in a corresponding groove. Two limiting blocks that cooperate with the corresponding plug are fixedly installed in each groove, and an annular groove is opened on each plug.

[0007] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, conductive copper plates are fixedly installed on the upper ends of both cylinders, and low-voltage outgoing terminals are threaded on both conductive copper plates.

[0008] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, each of the two conductive copper plates one and the two conductive copper plates two is provided with a ring-shaped and uniformly distributed locking groove, and each locking groove is matched with a corresponding plug. Each locking groove is fixedly installed with a contact finger spring that matches the corresponding ring groove. Both cylinders are equipped with a pushing mechanism for adaptively increasing or decreasing the number of conductive copper braids.

[0009] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, both of the pushing mechanisms include two sliding grooves, and the two sliding grooves are opened in the corresponding cylinders. The sliding grooves are all slidably installed with rods that are evenly distributed in a ring. A drive ring is fixedly installed between the corresponding multiple rods. Two arc-shaped push plates are fixedly installed on each drive ring. Two arc-shaped push plates are fixedly installed on each drive ring. A cylinder is fixedly installed on each plug. A drive component is installed on each drive ring.

[0010] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, each of the multiple driving components includes a rotating shaft, and the rotating shaft is rotatably mounted on the inner wall of the corresponding cylinder. Each rotating shaft is fixedly mounted with a turntable, and the turntable is sealed through and rotatably mounted on the corresponding cylinder. Each turntable has grooves that are evenly distributed in a ring, and each driving ring is fixedly mounted with protrusions that are evenly distributed in a ring.

[0011] In the above-mentioned low-voltage side cable-out type energy-saving traction transformer structure, each of the two heat dissipation components includes a support plate, and the support plate is fixedly installed on the inner wall of the corresponding cylinder. An oil cylinder is fixedly installed on the upper end of each of the two support plates. A uniformly distributed annular heat-conducting plate is sealed and fixedly installed on each of the two oil cylinders. One end of each heat-conducting plate is sealed and fixedly installed on the corresponding cylinder, and the heat-conducting plate is in contact with the surface of the corresponding constraint frame.

[0012] Compared with existing technologies, the advantages of this invention are: 1: When connecting an external cable, the present invention can effectively reduce the density of the low-voltage bushing output current and reduce the skin effect and Joule heat loss by using the cooperation of conductive copper plate one, conductive copper plate two, multiple copper foil flexible connections and multiple copper braids. This facilitates the direct connection between the low-voltage output terminal and the external cable, and improves the convenience of connecting the device to the external cable. 2: After connecting the external cable, the present invention can efficiently absorb the huge tensile force generated by the combined action of multiple copper braids and copper foil flexible connections through the cooperation of multiple copper braids and copper foil flexible connections. This improves the stability and safety of the continuous conductivity of the equipment. At the same time, the copper foil flexible connection has both flexibility and moderate rigidity. While buffering the vibration of the equipment, it can also provide reliable mechanical support for the overall structure of the equipment, thereby significantly improving the operational reliability and service life of the overall conductive connection structure of the equipment. 3: Before connecting the external cable, the present invention can symmetrically increase or decrease the number of copper braided parts actually involved in conduction inside the cylinder according to the actual operating power of the main body of the equipment or the load requirements of the user's site through the pushing mechanism, which helps to improve the equipment's adaptability and versatility. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the rising platform and its components; Figure 3 for Figure 2 Schematic cross-sectional view of the middle cylinder; Figure 4 for Figure 3 A schematic diagram of the structure after removing some internal components from the cylinder; Figure 5 for Figure 3 Schematic diagram of the internal components of the middle cylinder; Figure 6 for Figure 5 A schematic diagram of the structure of the conductive copper plate and its components. Figure 7 for Figure 6A structural schematic diagram of the braided components and their assemblies; Figure 8 for Figure 7 Exploded view of the braided core and two copper end plates; Figure 9 for Figure 7 Schematic diagram of the insertion / removal mechanism; Figure 10 for Figure 5 Schematic diagram of the middle pushing mechanism; Figure 11 for Figure 10 A schematic diagram of the structure of part A; Figure 12 for Figure 10 A front view of the plug and its partial components; Figure 13 for Figure 6 Cross-sectional schematic diagram of the conductive copper plate 1; Figure 14 for Figure 5 A schematic diagram of the heat dissipation component.

[0014] In the diagram: 1. Main body of the equipment; 2. Elevating seat; 3. Low-pressure bushing; 4. Cylinder; 5. Low-pressure output terminal; 6. Conductive copper plate one; 7. Conductive copper plate two; 8. Support rod; 9. Constraint frame; 10. Copper braided component; 11. Copper end plate; 12. Copper foil flexible connection; 13. Connection terminal; 14. Slide groove; 15. Plug; 16. Cylinder; 17. Annular groove; 18. Contact finger spring; 19. Drive ring; 20. Protrusion; 21. Rotating shaft; 22. Turntable; 23. Groove; 24. Arc-shaped push plate one; 25. Arc-shaped push plate two; 26. Engaging groove; 27. Support plate; 28. Oil cylinder; 29. ​​Heat-conducting plate. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Reference Figures 1-14A low-voltage side cable-out type energy-saving traction transformer structure includes a main body 1 (i.e., an existing traction transformer) and two cylinders 4. Two lifting seats 2 are fixedly installed on the main body 1, and low-voltage bushings 3 are fixedly installed on both lifting seats 2. Conductive copper plates 6 are fixedly installed at the lower ends of both cylinders 4, and the two conductive copper plates 6 are threaded onto the corresponding low-voltage bushings 3. Conductive copper plates 7 are fixedly installed at the upper ends of both cylinders 4, and low-voltage outgoing terminals 5 are threaded onto both conductive copper plates 7.

[0017] Reference Figures 2-9 Multiple fixing rods are fixedly installed on the inner walls of both cylinders 4 (shown in the figure but not labeled, combined with...). Figure 5 As can be seen, copper end plates 11 are fixedly installed on each of the fixed rods, and copper braided parts 10 are fixedly installed between each pair of copper end plates 11 (along the...). Figure 7 In the direction shown, "relative two" here refers to the two copper end plates 11 at the upper and lower ends of the copper braid 10. The copper braid 10 is made of multiple strands of high-purity copper braided wire through a cold pressing process. Support rods 8 are fixedly installed on the inner walls of the two cylinders 4 in a ring-shaped and uniformly distributed manner. Constraint frames 9 are fixedly installed on the support rods 8, and the constraint frames 9 are fixedly installed on the corresponding copper braid 10.

[0018] Copper foil flexible connectors 12 are fixedly installed on the copper end plates 11. The copper foil flexible connectors 12 are made of high-purity copper foil sheets that are evenly distributed in a linear shape and are stacked together. Each copper foil flexible connector 12 is equipped with a plug-in mechanism. Each of the two cylinders 4 is equipped with a heat dissipation component for dissipating heat from the corresponding copper braided parts 10.

[0019] Each of the multiple plugging and unplugging mechanisms includes a connection terminal 13, and the connection terminal 13 is fixedly installed on the corresponding copper foil flexible connection 12. Each connection terminal 13 has a sliding groove 14, and each sliding groove 14 is equipped with a lifting component.

[0020] Multiple lifting components each include a plug 15, and the plug 15 is slidably installed in the corresponding slide groove 14. Two limiting blocks that cooperate with the corresponding plug 15 are fixedly installed in the slide groove 14. Each plug 15 has an annular groove 17.

[0021] Both conductive copper plates 6 and 7 have evenly distributed annular locking grooves 26, and each locking groove 26 is matched with a corresponding plug 15. Each locking groove 26 is fixedly installed with a finger spring 18 that matches the corresponding annular groove 17. Both cylinders 4 are equipped with a pushing mechanism for adaptively increasing or decreasing the number of conductive copper braids 10.

[0022] Before using the equipment, first connect the external cable to the low-voltage output terminal 5 using bolts. Then start the main body 1 of the equipment. When the main body 1 is running, it will convert the high-voltage electrical energy input from the high-voltage side into a large current electrical energy on the low-voltage side through the principle of electromagnetic induction. This large current is collected by the existing low-voltage winding inside the main body 1 to the low-voltage bushing 3, and then conducted from the low-voltage bushing 3 to the conductive copper plate 6. Subsequently, the current flows along the... Figure 7 The current is transmitted upwards in the indicated direction, and after being conducted sequentially through multiple plugs 15, connecting terminals 13, copper foil flexible connections 12, and copper end plates 11, it is evenly distributed to multiple copper braids 10. Then, it is transmitted through multiple copper braids 10. With the coordinated conductive cooperation of the corresponding copper end plates 11, copper foil flexible connections 12, connecting terminals 13, and plugs 15 above, the multiple shunt currents are recombined into the conductive copper plate 7. Finally, the conductive copper plate 7 smoothly transmits the combined current to the connected external cable, completing the transmission of current from the main body of the equipment 1 to the external cable. In this process, through the cooperation of conductive copper plate 6, conductive copper plate 7, multiple connecting terminals 13, copper foil flexible connection 12, copper end plate 11, and copper braid 10, the single-channel high current output from the low-voltage bushing 3 is evenly divided into multiple channels and then smoothly merged back into a single channel before being transmitted to the external cable. This effectively reduces the density of the output current of the low-voltage bushing 3, reduces the skin effect and Joule heat loss, and avoids safety problems such as joint breakage, increased contact resistance, and localized ablation caused by stress concentration when the external cable is directly rigidly connected to the low-voltage output terminal. Furthermore, compared with the traditional hard copper busbar busbar scheme, there is no need to add multiple sections of hard copper busbar and transition connecting components between the low-voltage output terminal and the external cable, saving the cumbersome process of bolting and splicing the hard copper busbar section by section, greatly shortening the cable assembly cycle, and helping to improve the convenience of connecting the equipment with the external cable.

[0023] The purpose of setting the cylinder 4 to be threadedly connected to the low-pressure bushing 3 via the corresponding conductive copper plate 6 is to allow the cylinder 4 to be removed from the low-pressure bushing 3 by rotation, so that the conductive components installed inside the cylinder 4 can be replaced or repaired. This is convenient and helps to improve the flexibility of the equipment for replacement or repair.

[0024] Meanwhile, the copper foil flexible connections 12 are all made of high-purity copper foil sheets that are linearly and uniformly distributed. The purpose is to leverage the excellent electrical and thermal conductivity of copper while using the laminated structure of the sheet copper foil to further reduce the skin effect and proximity effect, making the current distribution more uniform. Moreover, this laminated structure can achieve the same or even better current carrying capacity in a smaller cross-section through the synergistic current shunting of multiple foil layers. There is no contact resistance loss at the splicing point of traditional hard copper busbars, which helps to improve the electrical conduction efficiency and stability of the device.

[0025] Meanwhile, the purpose of the copper braid 10 being made of multiple strands of high-purity copper (T2 / T3) braided wires through a cold pressing process is that copper itself has excellent electrical and thermal conductivity, good ductility and corrosion resistance, which can meet the material requirements for long-term stable operation of the main body of the equipment 1. At the same time, the high conductivity of the material can effectively reduce Joule loss when conducting large currents. Compared with the AC loss of hard copper busbars of the same cross-section, it can effectively reduce it by 5% to 15%. Furthermore, the multi-strand braided structure can further optimize the current distribution, which helps to further improve the current conduction efficiency and stability of the equipment.

[0026] Furthermore, the specific number of copper braided wires constituting the copper braided component 10 and the specific number of copper foil sheets constituting the copper foil flexible connection 12 can be flexibly increased or decreased according to the operating power of the main body 1 of the equipment or the actual needs of the user. This can help improve the versatility and adaptability of the equipment, enabling the equipment to meet the current carrying requirements of traction transformers of different power levels.

[0027] In terms of vibration and fatigue resistance, the braided structure of the copper braid 10 has natural elastic buffering characteristics, while the copper foil flexible connection 12 relies on the tiny gaps between the layers to form stress absorption channels. Both can efficiently absorb the locomotive running vibration, short-circuit electromagnetic shock, and the huge tensile force generated by the combined effect of the weight of the external cable and thermal expansion and contraction. Its fatigue resistance and resistance to repeated deformation are far superior to traditional rigid copper busbars. This can not only effectively avoid the fatigue fracture problem caused by stress concentration and excessive tensile load of traditional rigid copper busbars, but also compensate for the structural deformation caused by temperature changes (heat dissipation occurs during the conduction process of multiple copper braids 10 and copper foil flexible connection 12) and eliminate temperature stress damage. Moreover, the copper foil flexible connection 12 has both flexibility and moderate rigidity. While buffering the vibration of the equipment, it can also provide reliable mechanical support for the overall structure of the equipment, thereby significantly improving the operational reliability and service life of the overall conductive connection structure of the equipment, and helping to further improve the long-term stability and safety of the equipment for current transmission.

[0028] Reference Figures 5-13 Both pushing mechanisms include two sliding grooves (shown in the figure but not labeled, combined with...) Figure 4 As can be seen, the two sliding grooves are opened in the corresponding cylinder 4, and rods that are evenly distributed in a ring are slidably installed on the sliding grooves. Drive rings 19 are fixedly installed between the corresponding rods. Two arc-shaped push plates 24 are fixedly installed on each drive ring 19. Two arc-shaped push plates 25 are fixedly installed on each drive ring 19. A cylinder 16 is fixedly installed on each plug 15. A drive component is installed on each drive ring 19.

[0029] Multiple drive components each include a rotating shaft 21, and the rotating shaft 21 is rotatably mounted on the inner wall of the corresponding cylinder 4. A turntable 22 is fixedly mounted on the rotating shaft 21, and the turntable 22 is sealed through and rotatably mounted on the corresponding cylinder 4. The turntable 22 is provided with grooves 23 that are evenly distributed in an annular pattern. The drive ring 19 is fixedly mounted with protrusions 20 that are evenly distributed in an annular pattern.

[0030] In the process of current flow and conduction from the traction transformer to the outside through the hard copper busbar, the current carrying capacity and structural form of the hard copper busbar are completely fixed when it is manufactured. Therefore, the hard copper busbar cannot be flexibly and adaptively adjusted according to the actual operating power of the traction transformer, load fluctuations, or subsequent capacity expansion needs. For example, if the operating power of the traction transformer needs to be increased according to demand, a larger specification hard copper busbar needs to be replaced at the same time to improve the stability and safety of current output, which is a relatively cumbersome operation. Conversely, a smaller specification hard copper busbar needs to be replaced. This not only increases the cost of secondary processing and on-site disassembly and assembly of the equipment, but also requires rematching the installation space and connection interface, extending the equipment downtime modification and commissioning cycle.

[0031] Before operation, the number of copper braided parts 10 actually involved in electrical conduction inside the cylinder 4 can be increased or decreased using a pushing mechanism, based on the actual operating power of the main body 1 or the user's on-site load requirements. This helps to further improve the equipment's adaptability and versatility. For example, when the operating power of the main body 1 decreases, the operator can rotate the two turntables 22 on the cylinder 4 counterclockwise in sequence. When the lower turntable 22 is subjected to force and rotates counterclockwise around the corresponding shaft 21 (in conjunction with...), Figure 6 and Figure 11 (As shown in the direction), the driving force applied to the corresponding protrusion 20 by the groove 23 on it will drive the corresponding drive ring 19 to rotate clockwise. The drive ring 19 will then drive the two arc-shaped push plates 24 and 25 on it to rotate clockwise. That is, when the arc-shaped push plates 24 and 25 are moved to the left by the force (along the direction shown in the direction), the corresponding drive ring 19 will rotate clockwise. Figure 12 (In the direction shown), the thrust applied by the arc-shaped push plate 24 to the corresponding cylinder 16 will push the cylinder 16 and the connected plug 15 to move upward along the corresponding slide groove 14. During this process, the end of the corresponding contact spring 18 will be squeezed by the inclined surface of the side wall of the annular groove 17 opened on the plug 15, and will undergo elastic deformation, thereby gradually separating from the annular groove 17.

[0032] After the lower plug 15 is completely separated from the conductive copper plate 6, rotate the upper turntable 22 counterclockwise according to the above operating principle (in conjunction with...). Figure 5 and Figure 11(As shown in the direction), at this time, the turntable 22 cooperates with the corresponding driving component to drive the corresponding upper plug 15 to gradually move down until it separates from the conductive copper plate 2 7, thereby cutting off the electrical path of the copper braid 10 corresponding to the upper and lower plugs 15. This structure can quickly adapt to the operating requirements of different power levels without replacing the entire hardware. It avoids the cumbersome process of disassembling and replacing the entire traditional hard copper busbar, and greatly shortens the operation cycle of power adjustment, reducing maintenance costs. At the same time, by precisely increasing or decreasing the number of copper braids involved in conduction, the equipment can maintain the optimal current density under different power loads. This avoids the additional Joule heat loss and material waste caused by redundant current-carrying sections during low-power operation, and also prevents the risk of local overheating caused by excessive current density under high-power conditions, which helps to further improve the adaptability of the equipment.

[0033] Meanwhile, if the operating power of the main body 1 needs to be increased, the operator can rotate the two turntables 22 on the rotating cylinder 4 clockwise in sequence (along... Figure 10 (as shown in the direction), at this time the rotation of the upper and lower turntables 22 (along the direction shown in the direction) Figure 5 (As shown in the direction), through cooperation with the corresponding driving components, it will drive the corresponding driving ring 19, the two arc-shaped push plates 24, and the two arc-shaped push plates 25 to rotate counterclockwise, that is, drive the arc-shaped push plates 24 and 25 to move to the right (along the direction shown in ... Figure 12 (As shown in the direction), at this time, the pushing force applied to the corresponding cylinder 16 by the arc-shaped push plate 25 can push the cylinder 16 and the connected plug 15 to perform reverse reset displacement. During this process, the contracted end of the plug 15 will first squeeze the corresponding contact spring 18. When the lower end of the plug 15 is in contact with the surface of the corresponding locking groove 26, and the annular groove 17 on it moves to be directly opposite the corresponding contact spring 18, the contact spring 18 releases potential energy by relying on its own elastic restoring force and quickly locks into the annular groove 17, completing the locking and positioning of the plug 15. When the upper and lower plugs 15 are reinserted into the corresponding locking grooves 26, the electrical path of the copper braid 10 corresponding to the plug 15 can be reconnected. At the same time, through the cooperation of the contact spring 18 and the annular groove 17, the stability of the relative position of the upper and lower plugs 15 after being inserted with the conductive copper plate 16 and the conductive copper plate 27 can be improved, and the displacement deviation caused by locomotive running vibration and thermal expansion and contraction can be buffered.

[0034] And combined Figure 10 and Figure 12As can be seen, the two corresponding arc-shaped push plates 24 and 25 are symmetrically arranged. Combined with the uniformly distributed annular structure of copper braided parts 10 in the cylinder 4, the copper braided parts 10 involved in conduction can be symmetrically added or removed in units of 2 or multiples of 2. This symmetrical adjustment can effectively avoid the sudden increase or decrease in local current density caused by unilateral addition or removal of copper braided parts 10 in the cylinder 4. It helps to suppress the uneven influence of skin effect and proximity effect, and eliminates the safety hazards such as local overheating and ablation under high current conditions from the root. It ensures that the equipment can maintain stable electrical conduction efficiency at different power levels. At the same time, the symmetrical arrangement of copper braided parts 10 and copper foil flexible connection 12 can also avoid the problem of structural load and stress concentration caused by unilateral addition or removal to a certain extent. For example, under the complex working conditions of locomotive vibration and thermal expansion and contraction, the symmetrical arrangement of copper braided parts 10 and copper foil flexible connection 12 can significantly reduce the risk of structural deformation and fatigue fracture, and effectively improve the overall vibration resistance and fatigue resistance of the equipment.

[0035] Reference Figure 1 , Figure 5 , Figure 14 Both heat dissipation components include a support plate 27, and the support plate 27 is fixedly installed on the inner wall of the corresponding cylinder 4. An oil cylinder 28 is fixedly installed on the upper end of each support plate 27 (in conjunction with...). Figure 1 and Figure 14 As can be seen, both oil cylinders 28 are fixedly connected to inlet pipes and outlet pipes. Before using the equipment, the operator can inject an appropriate amount of cooling oil into the oil cylinder 28 through the inlet pipe connected to the top of the oil cylinder 28 as needed. At the same time, when it is necessary to replace the cooling oil inside the oil cylinder 28, the cooling oil inside can be discharged through the outlet pipe connected to the bottom of the oil cylinder 28. Both oil cylinders 28 are sealed and fixedly installed with uniformly distributed annular heat-conducting plates 29. One end of each heat-conducting plate 29 is sealed and fixedly installed on the corresponding cylinder 4, and the heat-conducting plates 29 are in contact with the surface of the corresponding constraint frame 9.

[0036] The purpose of setting constraint frames 9 on the outside of copper braids 10 is that when a short circuit occurs in the equipment, the extremely strong electrodynamic force can easily cause the copper braids 10, which are composed of multiple pure flexible copper braids, to break apart, shift, or even deform. At this time, the rigid constraint of the constraint frames 9 on the corresponding copper braids 10 can facilitate the constraint of multiple copper braids as a whole into a stable conductive unit, thereby improving the overall stability of multiple copper braids 10 and preventing them from becoming unstable under the action of electromagnetic force. This helps to further improve the stability of the conduction of multiple copper braids 10 to a certain extent.

[0037] The constraint frame 9 is made of high thermal conductivity insulating metal matrix composite material. This type of material uses metal as the matrix and adds ceramic / graphite reinforcing phase. Its mechanical stiffness is far greater than that of pure aluminum. It has strong resistance to deformation and impact and can withstand extreme short-circuit electrodynamic forces. This can further ensure that the copper braid 10 does not shift or untangle under strong electromagnetic force. At the same time, the thermal conductivity of this type of material is close to that of pure aluminum / pure copper. It can quickly dissipate the Joule heat generated during the conduction of the copper braid 10 and suppress local temperature rise.

[0038] Meanwhile, when the constraint frame 9 quickly conducts the Joule heat generated by the operation of the corresponding copper braid 10, this heat will be transferred to the corresponding heat-conducting plate 29 through the constraint frame 9. Since one end of the heat-conducting plate 29 extends into the oil cylinder 28 and is in direct contact with the cooling oil inside the cylinder, while the other end penetrates through the cylinder 4 and is exposed to the external environment, the heat carried by the heat-conducting plate 29 will be diverted at high speed. Part of it will exchange heat with the coolant inside the oil cylinder 28, and the other part will exchange heat with the outside air through the exposed plate, forming air cooling. This dual heat dissipation path of "oil cooling + air cooling" can improve the heat dissipation efficiency of the equipment for multiple copper braids 10, suppress the local temperature rise under high current conditions, and help to further ensure the stability and operational safety of the equipment's continuous conductivity.

[0039] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0040] In this invention, when the device is needed, the main body 1 is started first. The operation of the main body 1, through the cooperation of conductive copper plate 1 6, conductive copper plate 2 7, multiple connecting terminals 13, copper foil flexible connection 12, copper end plate 11, and copper braid 10, evenly divides the single large current output from the low-voltage bushing 3 into multiple paths, and then smoothly merges them into a single path, which is then led out from the low-voltage output terminal 5. This can effectively reduce the density of the output current of the low-voltage bushing 3, reduce the skin effect and Joule heat loss, and facilitate the direct connection of the external cable to the low-voltage output terminal 5, which helps to improve the convenience of connecting the device to the external cable.

[0041] Meanwhile, the copper braided component 10 is made of multiple copper braided wires through a cold pressing process. The braided structure has natural elastic buffering characteristics. The copper foil flexible connection 12 is made of multiple high-purity copper foil sheets stacked together. The tiny gaps between the layers can also form stress absorption channels. At this time, the combination of the two can effectively absorb the huge tensile force generated by the combined effects of locomotive running vibration, short-circuit electromagnetic shock, and the weight of the external cable and thermal expansion and contraction. This helps to improve the stability and safety of the continuous conductivity of the equipment. Moreover, the copper foil flexible connection 12 has both flexibility and moderate rigidity. While buffering the vibration of the equipment, it can also provide reliable mechanical support for the overall structure of the equipment, thereby significantly improving the operational reliability and service life of the overall conductive connection structure of the equipment.

[0042] Furthermore, before the equipment is put into operation, the number of copper braided parts 10 actually involved in conducting electricity inside the cylinder 4 can be symmetrically increased or decreased according to the actual operating power of the main body 1 of the equipment or the load requirements of the user's site through the pushing mechanism. This helps to improve the adaptability and versatility of the equipment under working conditions. At the same time, the heat generated by the copper braided parts 10 during the conduction process can be quickly discharged through the heat dissipation components, ensuring the stability of current conduction by multiple copper braided parts 10, which helps to further improve the stability and safety of the equipment for current conduction.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low-voltage side cable-out type energy-saving traction transformer structure, comprising a main body (1) and two cylindrical bodies (4), characterized in that, Two lifting seats (2) are fixedly installed on the main body (1) of the equipment. Low-pressure bushings (3) are fixedly installed on both lifting seats (2). Conductive copper plates (6) are fixedly installed at the lower ends of both cylinders (4). The two conductive copper plates (6) are threaded onto the corresponding low-pressure bushings (3). Multiple fixing rods are fixedly installed on the inner walls of the two cylinders (4), and copper end plates (11) are fixedly installed on the fixing rods. Copper braided parts (10) are fixedly installed between the two copper end plates (11). The copper braided parts (10) are made of multiple strands of high-purity copper braided wire by cold pressing. Support rods (8) are fixedly installed on the inner walls of the two cylinders (4) in a ring-shaped and uniformly distributed manner. Constraint frames (9) are fixedly installed on the support rods (8), and the constraint frames (9) are fixedly installed on the corresponding copper braided parts (10). Copper foil flexible connectors (12) are fixedly installed on the copper end plates (11). The copper foil flexible connectors (12) are made of high-purity copper foil sheets that are evenly distributed in a linear shape. The copper foil flexible connectors (12) are equipped with plug-in mechanisms. The two cylinders (4) are equipped with heat dissipation components for dissipating heat from the corresponding copper braids (10).

2. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 1, characterized in that, Each of the aforementioned plugging and unplugging mechanisms includes a connecting terminal (13), and the connecting terminal (13) is fixedly installed on the corresponding copper foil flexible connector (12). Each connecting terminal (13) has a sliding groove (14) inside, and each sliding groove (14) is equipped with a lifting component.

3. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 2, characterized in that, Each of the lifting components includes a plug (15), and the plug (15) is slidably installed in the corresponding slide groove (14). Two limiting blocks that cooperate with the corresponding plug (15) are fixedly installed in the slide groove (14). An annular groove (17) is provided on the plug (15).

4. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 3, characterized in that, Both of the two cylinders (4) are fixedly installed with conductive copper plates (7), and both of the conductive copper plates (7) are threaded with low-voltage output terminals (5).

5. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 4, characterized in that, Both of the two conductive copper plates (6) and the two conductive copper plates (7) are provided with a ring-shaped and uniformly distributed locking groove (26), and the locking groove (26) is matched with the corresponding plug (15). The locking groove (26) is fixedly installed with a finger spring (18) that matches the corresponding ring groove (17). Both of the cylinders (4) are equipped with a pushing mechanism for adaptively increasing or decreasing the number of conductive copper braids (10).

6. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 5, characterized in that, Both of the pushing mechanisms include two sliding grooves, and the two sliding grooves are opened in the corresponding cylinder (4). The sliding grooves are slidably installed with rods evenly distributed in a ring. A drive ring (19) is fixedly installed between the corresponding multiple rods. Two arc-shaped push plates (24) are fixedly installed on the drive ring (19). Two arc-shaped push plates (25) are fixedly installed on the drive ring (19). A cylinder (16) is fixedly installed on the plug (15). A drive component is installed on each drive ring (19).

7. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 6, characterized in that, Each of the aforementioned driving components includes a rotating shaft (21), and the rotating shaft (21) is rotatably mounted on the inner wall of the corresponding cylinder (4). A turntable (22) is fixedly mounted on the rotating shaft (21), and the turntable (22) is sealed through and rotatably mounted on the corresponding cylinder (4). The turntable (22) is provided with grooves (23) evenly distributed in an annular pattern. The driving ring (19) is fixedly mounted with protrusions (20) evenly distributed in an annular pattern.

8. The structure of a low-voltage side cable-out type energy-saving traction transformer according to claim 1, characterized in that, Both of the heat dissipation components include a support plate (27), and the support plate (27) is fixedly installed on the inner wall of the corresponding cylinder (4). An oil cylinder (28) is fixedly installed on the upper end of both support plates (27). A heat-conducting plate (29) is uniformly distributed in a ring on both oil cylinders (28). One end of the heat-conducting plate (29) is sealed through and fixedly installed on the corresponding cylinder (4). The heat-conducting plate (29) is in contact with the surface of the corresponding constraint frame (9).

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