Transformer high voltage terminal assembly and jacket assembly therefor

Abstract

The utility model relates to transformer technical field, specifically disclose a kind of transformer high voltage wiring assembly and its sheath subassembly, wherein, the sheath subassembly of transformer high voltage wiring assembly includes heat shrink film and multiple heat shrink nails buckle, heat shrink film is covered on wiring assembly by heat shrink, and the two edges of heat shrink film form slotted on the side of wiring assembly, and multiple heat shrink nails buckle are sealed slotted by the two edges of buckle heat shrink film;The component is through the self-tightening characteristics of heat shrink film and the double fixing effect of heat shrink nails buckle, meet the overall protection demand, effectively avoid wiring assembly because of wind sand, small animal and the reason caused by foreign matter phase-to-phase discharge, and effectively solve the risk of falling of sheath subassembly under dynamic environment, significantly improve sealing performance.The synergistic effect of heat shrink film and heat shrink nails buckle not only guarantees the structural integrity of sheath whole, but also reduces maintenance cost through modular design.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more specifically, to a transformer high-voltage wiring assembly and its sheath assembly. Background Technology

[0002] Transformer high-voltage wiring assemblies are crucial in power systems, and their protective measures play an important role in ensuring equipment safety and preventing interference from environmental factors.

[0003] In the power system operating environment, the protection structure of the high-voltage wiring assembly of the transformer has significant technical defects. The existing protection structure generally protects the live parts of the wiring assembly, ignoring the protection requirements of the entire assembly. This can lead to phase-to-phase discharge caused by foreign objects such as wind, sand, and small animals, resulting in huge economic losses. Secondly, the protection structure that is only set on the live parts is at risk of falling off due to insecure fixation during long-term use, which can cause the protection function to fail and fail to effectively protect the wiring assembly.

[0004] There is currently no effective technical solution to the above problems. Utility Model Content

[0005] The purpose of this application is to provide a transformer high-voltage wiring assembly and its sheath assembly to avoid phase-to-phase discharge caused by foreign objects such as wind, sand, and small animals, and to solve the risk of sheath assembly falling off in dynamic environments.

[0006] In a first aspect, this application provides a sheath assembly for a transformer high-voltage wiring assembly, applied to the wiring assembly, comprising a heat-shrinkable film and a plurality of heat-shrinkable fasteners. The heat-shrinkable film covers the wiring assembly, and the two edges of the heat-shrinkable film form a slit on one side of the wiring assembly. The plurality of heat-shrinkable fasteners seal the slit by fastening the two edges of the heat-shrinkable film.

[0007] The sheath assembly of the transformer high-voltage wiring assembly, wherein the heat-shrink film has a flat portion on both edges, the two flat portions are bent outwards and flush with each other in a direction away from the wiring assembly, and the plurality of heat-shrink fasteners are fixed on the two flat portions to fasten the two edges of the heat-shrink film.

[0008] The sheath assembly of the transformer high-voltage wiring assembly, wherein the heat shrinkable fastener includes an integrally connected limiting part, a cylindrical part and a conical head, and the two edges of the heat shrinkable film are provided with a plurality of first holes that cooperate with the heat shrinkable fastener.

[0009] Secondly, this application also provides a transformer high-voltage wiring assembly, including a wiring assembly and a sheath assembly of the transformer high-voltage wiring assembly as provided in the first aspect.

[0010] The transformer high-voltage wiring assembly includes an insulating porcelain insulator, a terminal block, and a copper lug. The terminal block is fixed to the insulating porcelain insulator, and the copper lug is fixed to the terminal block.

[0011] The transformer high-voltage wiring assembly, wherein the heat-shrink film completely covers the terminal and the copper lug, and the heat-shrink film completely or partially covers the insulating porcelain insulator.

[0012] The transformer high-voltage wiring assembly includes an insulating porcelain insulator with a second hole, and one end of the terminal block is fixed to the second hole.

[0013] The transformer high-voltage wiring assembly, wherein the copper lug is used to connect the cable, and the slit is located on the side of the insulating porcelain insulator near the cable.

[0014] The transformer high-voltage wiring assembly, wherein the insulating porcelain insulator comprises a plurality of linearly arrayed umbrella blades, and each umbrella blade is provided with at least two heat-shrink fasteners on one side.

[0015] The transformer high-voltage wiring assembly, wherein the umbrella-shaped blades consist of 6-9 parts.

[0016] As can be seen from the above, this application provides a transformer high-voltage wiring assembly and its sheath assembly. The sheath assembly of the transformer high-voltage wiring assembly of this application, through the self-tightening properties of the heat-shrink film and the dual fixing effect of the heat-shrink fasteners, meets the overall protection requirements, effectively preventing phase-to-phase discharge caused by foreign objects such as windblown sand and small animals, and effectively solving the risk of sheath assembly detachment in dynamic environments, significantly improving sealing performance. The synergistic effect of the heat-shrink film and heat-shrink fasteners ensures the overall structural integrity of the sheath and reduces maintenance costs through modular design. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sheath assembly of the transformer high-voltage wiring assembly provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the structure of the heat shrink fastener provided in the embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the wiring assembly.

[0020] Reference numerals: 1. Heat shrink film; 2. Heat shrink fastener; 3. Insulating porcelain bottle; 4. Terminal post; 5. Copper lug; 11. Slit; 12. Flat part; 21. Limiting part; 22. Cylindrical part; 23. Conical head; 31. Umbrella leaf part. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 of this utility model. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; 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 utility model according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] Firstly, please refer to Figure 1 and Figure 2 Some embodiments of this application provide a sheath assembly for a transformer high-voltage wiring assembly, which is applied to the wiring assembly. It includes a heat-shrinkable film 1 and a plurality of heat-shrinkable fasteners 2. The heat-shrinkable film 1 is heat-shrinkable and covers the wiring assembly. The two edges of the heat-shrinkable film 1 form a slit 11 on one side of the wiring assembly. The plurality of heat-shrinkable fasteners 2 seal the slit 11 by fastening the two edges of the heat-shrinkable film 1.

[0027] Specifically, the sheath assembly of this application achieves sealing protection of the wiring assembly through the synergistic effect of heat-shrinkable film 1 and heat-shrinkable fasteners 2. The heat-shrinkable film 1 refers to a thin film of polymer material with heat-shrinkable properties, which can directionally shrink in a preset direction after being heated. For example, it can be a double-walled heat-shrinkable film 1 made of polyolefin or polyvinyl chloride material, or a single-walled heat-shrinkable film 1 whose shrinkage is triggered by an electric heating device or a flame jet device. During the shrinkage process, the heat-shrinkable film 1 forms a self-tightening structure through molecular chain rearrangement, and its shrinkage rate can be adjusted within the range of 10%-50% to adapt to wiring assemblies of different sizes. The two edges of the heat-shrinkable film 1 are mechanically fixed at the opening 11 formed after shrinkage by heat-shrinkable fasteners 2. The heat-shrinkable fasteners 2 refer to metal or plastic fasteners with clamping functions. Specific embodiments include, but are not limited to, snap-on fasteners, threaded fasteners, or wedge-shaped locking fasteners. These fasteners achieve clamping and fixing of the edges of the heat-shrinkable film 1 through elastic deformation or plastic deformation. This application defines the sealing area by designing the slit 11, so that the heat shrinkable staple 2 only acts on the stress concentration area, reducing the impact of material deformation stress on the overall sealing performance, while providing a detachable maintenance interface for subsequent maintenance.

[0028] The heat-shrink film 1 achieves a tight fit with the wiring assembly through its heat-shrink properties, and its edges naturally adhere during shrinkage to form a slit 11. Multiple heat-shrink fasteners 2 act as mechanical fixing elements, converting the stress concentration at the slit 11 into a uniform clamping force by fastening the two edges of the heat-shrink film 1. This avoids the weakness of traditional integral wrapping structures that are prone to loosening under vibration, and also reduces the impact of material deformation stress on the overall seal through a localized sealing structure. The shrinkage deformation of the heat-shrink film 1 and the mechanical locking of the heat-shrink fasteners 2 form a dual fixing mechanism, where the heat-shrink film 1 provides a basic sealing layer, while the heat-shrink fasteners 2 strengthen the connection strength of key parts. The synergistic effect of both improves the structural stability of the sheath under complex working conditions.

[0029] The sheath assembly of the transformer high-voltage wiring assembly of this application meets the overall protection requirements through the self-tightening properties of the heat-shrinkable film 1 and the dual fixing effect of the heat-shrinkable fasteners 2. This effectively prevents phase-to-phase discharge caused by foreign objects such as windblown sand and small animals, and effectively solves the risk of sheath assembly detachment in dynamic environments, significantly improving sealing performance. The synergistic effect of the heat-shrinkable film 1 and the heat-shrinkable fasteners 2 ensures the overall structural integrity of the sheath and reduces maintenance costs through modular design.

[0030] In some preferred embodiments, the heat shrink film 1 has a flat portion 12 on both edges. The two flat portions 12 are bent outward and flush with each other in a direction away from the wiring assembly. A plurality of heat shrink clips 2 are snapped onto the two flat portions 12 to fasten the two edges of the heat shrink film 1.

[0031] Specifically, the flat portion 12 refers to the flat area formed by a specific process at the edge of the heat shrink film 1, which is used to provide a standardized fixing platform for the heat shrink staple 2. Outward bending and flush fitting means that the two flat portions 12 are formed into an L-shaped structure through a bending process while maintaining parallel surfaces. Snap-fit ​​fixing means that the heat shrink staple 2 and the flat portion 12 are connected through mechanical interlocking, which utilizes the extensibility of the flat portion 12 to achieve multi-point coordinated locking; the gap between the two flat portions 12 constitutes the slit 11.

[0032] Specifically, when the two planar portions 12 are flush and fitted together, the geometric consistency of the contact surface significantly improves the uniformity of the force on the heat shrinkable fastener 2. The presence of the planar portion 12 transforms the originally irregular edge of the heat shrinkable film 1 into a precisely controllable flat area, ensuring that the contact pressure between the heat shrinkable fastener 2 and the heat shrinkable film 1 is evenly distributed; the outwardly bent planar portion 12 forms an L-shaped structure when fitted together, which increases the mechanical strength of the edge; the distributed fixation of multiple heat shrinkable fasteners 2 on the planar portion 12 utilizes the deformation coordination ability of the planar portion 12 to maintain the stability of the clamping force of the heat shrinkable fastener 2.

[0033] This application effectively solves the problem of seal failure of the gap 11 caused by unreliable fixation of the heat shrinkable fastener 2 through the structural design of the flat part 12. The flat part 12 provides a flat fixing base for the heat shrinkable fastener 2, the bending structure enhances the mechanical strength of the edge, the flush fit ensures uniform stress distribution, and the distributed snap-fit ​​fixation improves the overall sealing stability, significantly reduces the risk of the sheath assembly falling off, and ensures long-term protection.

[0034] In some preferred embodiments, the heat shrinkable fastener 2 includes an integrally connected limiting part 21, a cylindrical part 22 and a conical head 23, and the two edges of the heat shrink film 1 are provided with a plurality of first holes (not shown in the figure) that mate with the heat shrinkable fastener 2.

[0035] Specifically, the first hole is located on the planar part 12, and the first holes on the two planar parts 12 are symmetrically distributed.

[0036] More specifically, the heat shrinkable staple 2 is inserted into the first hole on the edge through the conical head 23, so that the limiting part 21 and the conical head 23 clamp the two edges of the heat shrinkable film 1 and the cylindrical part 22 cooperates with the first hole to fix the two edges.

[0037] In practical applications, the limiting part 21 refers to the annular flange structure at the top of the heat shrink staple 2, which can be implemented using a flange-shaped or stepped structure, with the purpose of providing an axial limiting reference surface. The cylindrical part 22 can be understood as a cylinder of equal diameter in the middle section. The conical head 23 refers to the conical guide section at the end, used to achieve self-alignment assembly by guiding the conical surface.

[0038] Specifically, this design utilizes the radial expansion effect generated when the conical head 23 penetrates the first hole, creating an interference fit between the first hole of the heat-shrink film 1 and the cylindrical portion 22. This fit establishes a preload through the elastic deformation of the material, resisting the tendency to loosen due to external vibrations. The clamping surface formed by the limiting portion 21 and the conical head 23 forms a surface contact with the surface of the heat-shrink film 1, significantly improving shear resistance compared to traditional point or line contact. The fit length design between the cylindrical portion 22 and the first hole balances axial positioning accuracy and assembly tolerance, while the guide cone surface of the conical head 23 reduces the alignment requirements during installation.

[0039] The three-section heat shrink staple 2 structure and the first hole design form a composite fixing mechanism. Through the dual effects of geometric constraints and material self-locking, it effectively improves the stability of the sealing structure in dynamic environments while ensuring rapid assembly efficiency.

[0040] Secondly, please refer to Figures 1-3 Some embodiments of this application also provide a transformer high-voltage wiring assembly, including a wiring assembly and a sheath assembly of the transformer high-voltage wiring assembly as provided in the first aspect.

[0041] The transformer high-voltage wiring assembly of this application achieves overall protection through the self-tightening properties of the heat-shrinkable film 1 and the dual fixing effect of the heat-shrinkable fasteners 2. It boasts strong protective performance, effectively preventing phase-to-phase discharge caused by foreign objects such as sand, small animals, etc., and effectively solving the risk of sheath assembly detachment in dynamic environments, significantly improving sealing performance. The synergistic effect of the heat-shrinkable film 1 and the heat-shrinkable fasteners 2 ensures the overall structural integrity of the sheath while reducing maintenance costs through modular design.

[0042] In some preferred embodiments, the wiring assembly includes an insulating porcelain insulator 3, a terminal block 4, and a copper lug 5, with the terminal block 4 fixed to the insulating porcelain insulator 3 and the copper lug 5 fixed to the terminal block 4.

[0043] Specifically, the insulating porcelain insulator 3 refers to an insulating support structure made of ceramic material, such as alumina ceramic or feldspar ceramic, which is used to provide a rigid support reference for the terminal block 4; the terminal block 4 refers to a columnar connector made of conductive metal, which is used to establish a stable conductive path; the copper lug 5 refers to a conductive connector used to connect cables.

[0044] More specifically, the terminal 4 has threads, and the copper lug 5 is clamped and fixed to the terminal 4 by two nuts that are threadedly connected to the terminal 4.

[0045] In some preferred embodiments, the heat-shrink film 1 completely covers the terminal 4 and the copper lug 5, and the heat-shrink film 1 completely or partially covers the insulating porcelain bottle 3.

[0046] Specifically, the heat-shrink film 1 completely covering the terminal 4 and the copper lug 5 means that after heat shrinking, the heat-shrink film 1 forms a continuous covering layer, completely wrapping the metal surfaces of the terminal 4 and the copper lug 5, thereby eliminating the metal edge effect and blocking the contact path of foreign objects. The heat-shrink film 1 partially covering the insulating porcelain bottle 3 means that the heat-shrink film 1 covers a portion of the insulating porcelain bottle 3. This can be achieved by using a slit structure 11 combined with the linear array characteristics of the umbrella blades 31, automatically compensating for differences in the spacing between different umbrella blades through material flow. The purpose is to achieve adaptive bonding while maintaining mechanical strength. In this embodiment, the heat-shrink film 1 preferably covers all the umbrella blades 31 of the insulating porcelain bottle 3 to ensure the protective effect of the insulating porcelain bottle 3.

[0047] In some preferred embodiments, the insulating porcelain bottle 3 is provided with a second hole (not shown in the figure), and one end of the terminal 4 is fixed to the second hole.

[0048] Specifically, the second hole refers to the positioning hole made in the insulating porcelain insulator 3 for embedding the end of the terminal 4. It can be implemented using a cylindrical blind hole, a stepped hole, or a hole structure with internal threads, and is formed into the body of the insulating porcelain insulator 3 by machining or molding. Fixing one end of the terminal 4 to the second hole means that the end of the terminal 4 is connected to the second hole by interference fit, threaded connection, or adhesive filling. The purpose is to replace the traditional planar fixing method with a three-dimensional limiting structure, thereby enhancing the shear and pull-out resistance of the connection.

[0049] In some preferred embodiments, the copper lug 5 is used to connect the cable (not shown in the figure), and the slit 11 is located on the side of the insulating porcelain insulator 3 near the cable.

[0050] Specifically, the slot 11 is positioned on the side of the insulating porcelain insulator 3 closest to the cable. This positional relationship achieves multiple technical effects: First, the slot 11 and the stress direction of the cable connection side work synergistically. When the cable is subjected to external force, the edge of the heat-shrinkable film 1 at the slot 11 of the sheath can undergo adaptive deformation along the stress direction, thereby maintaining the integrity of the sealing structure. Second, the spatial correspondence between the position of the slot 11 and the cable connection side optimizes the installation operation path and ensures that the sealing structure forms a continuous stress distribution in key areas.

[0051] In some preferred embodiments, the insulating ceramic bottle 3 includes a plurality of linearly arrayed umbrella blades 31, each umbrella blade 31 having at least two heat-shrink fasteners 2 on one side.

[0052] Specifically, setting multiple umbrella blades 31 is a common method in the art to increase the creepage distance of wiring components, and its working principle will not be described in detail here. The two heat shrink clips 2 configured on one side of each umbrella blade 31 refer to at least two fixing points distributed circumferentially on the umbrella blade 31. They can be arranged in a symmetrical or asymmetrical manner, and the stress balance of the sheath assembly is enhanced by multi-point distributed fixing.

[0053] Specifically, this technical solution designs the umbrella blades 31 as a linear array structure, which improves insulation performance while forming a regular distribution of fixed support points. The two heat-shrinkable fasteners 2 configured in each umbrella blade 31 form a local stress-bearing unit in space. When the sheath is subjected to dynamic loads, the stress dispersion channels are formed between adjacent heat-shrinkable fasteners 2 through the deformation coordination of the heat-shrinkable film 1, decomposing the concentrated force into the cooperative bearing of multiple local areas.

[0054] Through the above solution, the corresponding configuration of the heat shrink buckle 2 and the umbrella leaf 31 optimizes the fit between the sheath and the insulating porcelain bottle 3, reduces the possibility of foreign object intrusion caused by the expansion of the opening 11, and finally achieves long-term stable protection of the sheath assembly under complex working conditions.

[0055] In some preferred embodiments, there are 6-9 umbrella-shaped leaf portions 31.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A sheath assembly for a transformer high-voltage wiring assembly, used on the wiring assembly, characterized in that, The device includes heat-shrink film and multiple heat-shrink fasteners. The heat-shrink film is heat-shrinkably wrapped around the wiring assembly, and the two edges of the heat-shrink film form a slit on one side of the wiring assembly. The multiple heat-shrink fasteners seal the slit by fastening the two edges of the heat-shrink film.

2. The sheath assembly of the transformer high-voltage wiring assembly according to claim 1, characterized in that, The heat shrink film has a flat portion on both edges. The two flat portions are bent outwards and flush with each other in a direction away from the wiring assembly. The plurality of heat shrink clips are fixed on the two flat portions and fasten the two edges of the heat shrink film.

3. The sheath assembly of the transformer high-voltage wiring assembly according to claim 1, characterized in that, The heat shrinkable fastener includes an integrally connected limiting part, a cylindrical part, and a conical head, and the two edges of the heat shrink film are provided with a plurality of first holes that mate with the heat shrinkable fastener.

4. A transformer high-voltage wiring assembly, characterized in that, Includes the wiring assembly and the sheath assembly of the transformer high-voltage wiring assembly as described in any one of claims 1-3.

5. The transformer high-voltage wiring assembly according to claim 4, characterized in that, The wiring assembly includes an insulating porcelain insulator, a terminal block, and a copper lug. The terminal block is fixed to the insulating porcelain insulator, and the copper lug is fixed to the terminal block.

6. The transformer high-voltage wiring assembly according to claim 5, characterized in that, The heat-shrink film completely covers the terminal block and the copper lug, and the heat-shrink film completely or partially covers the insulating porcelain bottle.

7. The transformer high-voltage wiring assembly according to claim 5, characterized in that, The insulating porcelain bottle has a second hole, and one end of the terminal block is fixed to the second hole.

8. The transformer high-voltage wiring assembly according to claim 5, characterized in that, The copper lug is used to connect the cable, and the slit is located on the side of the insulating porcelain insulator closest to the cable.

9. The transformer high-voltage wiring assembly according to claim 5, characterized in that, The insulating porcelain bottle includes multiple linearly arrayed umbrella-shaped sections, with at least two heat-shrink fasteners configured on one side of each umbrella-shaped section.

10. The transformer high-voltage wiring assembly according to claim 9, characterized in that, The umbrella-shaped leaf section has 6-9 segments.

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