Lead structure of dry-type transformer
By introducing an arc segment design into the lead structure of the dry-type transformer, the problem of uneven insulation material at the bend is solved, the insulation effect is improved, cracks in the insulation material and the risk of creepage are avoided, and the insulation performance is enhanced.
Patent Information
- Application Number
- CN202423320117.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the existing dry-type transformer lead structure, the lack of rounded transitions at bends leads to uneven insulation material thickness and poor insulation performance.
The first connector, the second connector, and the intermediate conductive wire, made of conductive materials, form an arc segment with the connecting groove, contact spring, and conductive sheet through a connecting mechanism. They are wrapped with a heat-shrinkable tape wrapping layer and an outer injection molding layer to ensure a smooth arc transition at the bend.
This design achieves a uniform transition between the heat-shrinkable tape wrapping layer and the outer injection molding layer at the bending point, avoiding cracks, improving insulation performance, preventing creepage, and enhancing overall insulation performance.
Smart Images
Figure CN223857987U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a mould, concretely relates to a dry -type transformer lead structure. BACKGROUND
[0002] In the dry -type transformer, there are three voltage coils, and the outlet ends of different voltage coils are connected through a lead structure, and the lead structure is an indispensable component of the dry -type transformer.
[0003] Because the outlet ends of different voltage coils have a height difference, in order to adapt to this height difference, a bend is arranged at the lead structure. Figure 1 As shown in the figure, the bend in the prior art lead structure has no arc transition, resulting in uneven thickness of the insulating material at the bend in the lead structure, and poor insulation effect. CONTENT OF THE UTILITY MODEL
[0004] The utility model provides a dry -type transformer lead structure, solves the problem of no arc transition at the bend in the prior art lead structure.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] The utility model discloses a dry -type transformer lead structure, comprising: first joint, second joint, intermediate conducting wire, heat shrink tape winding layer and outer injection molding layer, the first joint first end and the second joint first end are connected through the intermediate conducting wire, the first joint, the second joint and the intermediate conducting wire are all made of conducting material, the first joint first end, the second joint end and the intermediate conducting wire are wrapped with heat shrink tape winding layer, and the heat shrink tape winding layer is wrapped with the outer injection molding layer, and the heat shrink tape winding layer bend and the outer injection molding layer bend all form an arc section.
[0007] Preferably, the first joint and the second joint are electrically connected with the intermediate conducting wire through a connecting mechanism.
[0008] Preferably, the connecting mechanism comprises: a connecting groove body, a contact spring piece and a conducting piece, the connecting groove body, the contact spring piece and the conducting piece are all made of conducting material, the first joint and the second joint are both fixed with the connecting groove body, the connecting groove body is connected to one end of the contact spring piece, the other end of the contact spring piece is bent to form an arc section, the intermediate conducting wire extends the conducting piece, the arc section is used to tightly contact with the conducting piece, and the conducting piece is placed into the connecting groove body.
[0009] Preferably, the connecting groove body is provided with an opening, and the opening forms the contact spring piece.
[0010] Preferably, the conducting piece protrudes to form a hook block, the hook block extends into the opening, and the hook block hooks the inner wall of the opening.
[0011] Preferably, an annular sleeve is sleeved on the connecting groove, one end of the connecting groove for placing the conductive sheet is an insertion station, the other end of the connecting groove is a waiting station, the annular sleeve is movable between the insertion station and the waiting station, and the annular sleeve is used for pressing the conductive sheet on the arc segment at the insertion station.
[0012] Preferably, the connecting groove protrudes a blocking portion at an end close to the first joint or the second joint, and the blocking portion is used for blocking the heat-shrinkable tape winding layer material from entering the annular sleeve.
[0013] Preferably, a step is formed at a connection between the conductive sheet and the intermediate conductive wire, and the step is in close contact with the annular sleeve located at the insertion station.
[0014] Preferably, the annular sleeve located at the insertion station covers the contact spring.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The applicant changes the bending portion in the lead structure into an arc segment, realizes uniform transition of the heat-shrinkable tape winding layer and the outer injection molding layer at the arc segment, avoids larger cracks of the heat-shrinkable tape winding layer and the outer injection molding layer due to too large bending angle, avoids easy creepage of the heat-shrinkable tape winding layer and the outer injection molding layer at the bending portion, and improves the insulation effect of the entire dry-type transformer lead structure.
[0017] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a structural schematic view of the lead structure of the dry-type transformer in the prior art.
[0019] Figure 2 It is a structural schematic view of the lead structure of the dry-type transformer in the present application.
[0020] Figure 3 It is a structural schematic view of the first joint or the second joint when the annular sleeve is located at the waiting station and the conductive sheet is not inserted into the connecting groove in the present application.
[0021] Figure 4 It is a structural schematic view of the first joint or the second joint when the annular sleeve is located at the waiting station and the conductive sheet is inserted into the connecting groove in the present application.
[0022] Figure 5 It is a sectional view of the first joint or the second joint when the annular sleeve is located at the waiting station and the conductive sheet is inserted into the connecting groove in the present application.
[0023] Figure 6The first joint or the second joint structure diagram of the annular sleeve in the insertion station and the conductive sheet inserted into the connecting groove body in the application.
[0024] The first joint 1, the second joint 2, the intermediate conductive wire 3, the outer injection molding layer 4, the connecting groove body 51, the opening 510, the contact spring 52, the conductive sheet 53, the hook block 530, the step 531, the annular sleeve 54, and the blocking part 540. DETAILED DESCRIPTION
[0025] In order to make the technical means, creative features, purposes and effects of the utility model more clear and easy to understand, the utility model is further described below in combination with the drawings and specific embodiments:
[0026] As shown in Figure 2 The utility model discloses a dry -type transformer lead structure, include: first joint 1, second joint 2, intermediate conductive wire 3, heat shrink tape winding layer (not shown in the drawing) and outer injection molding layer 4, first joint 1 first end and second joint 2 first end are connected through intermediate conductive wire 3, and first joint 1, second joint 2 and intermediate conductive wire 3 are all made of conductive material, first joint 1 first end, second joint 2 end and intermediate conductive wire 3 are wrapped with heat shrink tape winding layer, and heat shrink tape winding layer is wrapped with outer injection molding layer 4, and the bending place of heat shrink tape winding layer and the bending place of outer injection molding layer 4 all form circular arc section.
[0027] As shown in Figures 3 to 6 The first joint 1 and the second joint 2 are electrically connected with the intermediate conductive wire 3 through the connecting mechanism.
[0028] The connecting mechanism includes the connecting groove body 51, the contact spring 52 and the conductive sheet 53, and the connecting groove body 51, the contact spring 52 and the conductive sheet 53 are all made of conductive material, the first joint 1 and the second joint 2 are both fixed with the connecting groove body 51, the connecting groove body 51 is connected to one end of the contact spring 52, the other end of the contact spring 52 is bent to form an arc segment, the intermediate conductive wire 3 extends the conductive sheet 53, the arc segment is used to be close to the conductive sheet 53, and the conductive sheet 53 is placed into the connecting groove body 51. After the conductive sheet 53 is inserted into the connecting groove body 51, the conductive sheet 53 makes the contact spring 52 deform, so that the first joint 1 or the second joint 2 is connected to the intermediate conductive wire 3 through the connecting groove body 51, the contact spring 52 and the conductive sheet 53, thereby realizing the conductive connection between the first joint 1 and the second joint 2.
[0029] The connecting groove body 51 is provided with an opening 510, and the contact spring 52 is formed at the opening 510. The opening 510 can be provided with the contact spring 52, or the contact spring 52 can be integrally formed with the connecting groove body 51 in a mold to ensure the connection strength of the contact spring 52 and the connecting groove body 51 and avoid the separation of the contact spring 52 and the connecting groove body 51.
[0030] The conductive sheet 53 is provided with a hook block 530 protruding into the opening 510 and hooked on the inner wall of the opening 510. The hook block 530 is hooked on the inner wall of the opening 510 to avoid the separation of the conductive sheet 53 and the connecting groove body 51.
[0031] The connecting groove body 51 is provided with an annular sleeve 54, one end of the connecting groove body 51 for inserting the conductive sheet 53 is an insertion station, the other end of the connecting groove body 51 is a waiting station, the annular sleeve 54 can move between the insertion station and the waiting station, and the annular sleeve 54 is used to press the conductive sheet 53 on the arc-shaped section at the insertion station. Before winding the heat-shrinkable tape winding layer, the annular sleeve 54 is used to position the intermediate conductive wire 3 and the contact spring to avoid the random movement of the conductive sheet 53 relative to the connecting groove body 51 during winding.
[0032] The connecting groove body 51 is provided with a blocking portion 540 protruding from the end close to the first joint 1 or the second joint 2, and the blocking portion 540 is used to block the heat-shrinkable tape winding layer material from entering the annular sleeve 54. After the heat-shrinkable tape winding layer is wound, the heat-shrinkable tape winding layer needs to be heated to make all the heat-shrinkable tape winding layers shrink into a layered whole. If the heat-shrinkable tape winding layer material is in a molten state during shrinking, it is easy to flow to the position of the contact spring 52, and if the molten material extrudes the contact spring 52 and the conductive sheet 53 to separate, a poor contact condition will occur. Based on the foregoing reasons, the blocking portion 540 is added to block the molten material from entering, thereby avoiding affecting the contact between the contact spring 52 and the conductive sheet 53.
[0033] The conductive sheet 53 is provided with a step 531 at the connection position with the intermediate conductive wire 3, and the step 531 is tightly attached to the annular sleeve 54 at the insertion station. During winding of the heat-shrinkable tape winding layer, the gap between the annular sleeve 54 and the first joint 1 is wound first, and the step 531 cooperates with the annular sleeve 54 to position the annular sleeve 54, thereby keeping the hook block 530 of the conductive sheet 53 hooked on the inner wall of the opening 510 to avoid the separation of the conductive sheet 53 and the connecting groove body 51, and ensuring that the conductive sheet 53 is tightly attached to the contact spring 52 to avoid the subsequent random separation of the conductive sheet 53 and the connecting groove body 51 during winding of the heat-shrinkable tape winding layer, thereby facilitating the winding of the heat-shrinkable tape winding layer.
[0034] The annular sleeve 54 at the insertion station covers the contact spring 52 to sufficiently block the molten material from contacting the contact spring 52.
[0035] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.
Claims
1. A dry-type transformer lead structure, characterized by, The utility model relates to a kind of electrically conductive cable, including: First joint (1), second joint (2), intermediate electrically conductive wire (3), heat shrinkable tape winding layer and outer injection molding layer (4); First joint (1) first end and second joint (2) first end are connected by intermediate electrically conductive wire (3), and first joint (1), second joint (2) and intermediate electrically conductive wire (3) are made of conductive material; First joint (1) first end, second joint (2) end and intermediate electrically conductive wire (3) are wrapped with heat shrinkable tape winding layer, and heat shrinkable tape winding layer is wrapped with outer injection molding layer (4); Circular segment is formed at the bending of heat shrinkable tape winding layer and the bending of outer injection molding layer (4).
2. The dry-type transformer lead structure according to claim 1, characterized in that, First joint (1) and second joint (2) are electrically connected with intermediate electrically conductive wire (3) by connecting mechanism.
3. A dry-type transformer lead structure according to claim 2, characterized in that Connecting mechanism includes: connecting groove body (51), contact spring (52) and conductive sheet (53), connecting groove body (51), contact spring (52) and conductive sheet (53) are made of conductive material, first joint (1) and second joint (2) are fixed with connecting groove body (51), connecting groove body (51) is connected to one end of contact spring (52), the other end of contact spring (52) is bent to form arc segment, and intermediate electrically conductive wire (3) extends conductive sheet (53), arc segment is used to tightly contact with conductive sheet (53), and conductive sheet (53) is placed into connecting groove body (51).
4. The dry-type transformer lead structure according to claim 3, characterized in that, Connecting groove body (51) is provided with opening (510), and contact spring (52) is formed at opening (510).
5. A dry-type transformer lead structure according to claim 4, wherein Conductive sheet (53) is protrudingly formed with hook block (530), hook block (530) extends into opening (510), and hook block (530) hooks inner wall of opening (510).
6. Dry-type transformer lead structure according to any one of claims 3 to 5, characterized in that Annular sleeve (54) is sleeved on connecting groove body (51), one end of connecting groove body (51) for placing conductive sheet (53) is insertion station, the other end of connecting groove body (51) is waiting station, annular sleeve (54) can move between insertion station and waiting station, and annular sleeve (54) is used to press conductive sheet (53) on arc segment at insertion station.
7. A dry-type transformer lead structure according to claim 6, characterized in that The end of connecting groove body (51) close to first joint (1) or second joint (2) is protrudingly formed with blocking part (540), and blocking part (540) is used to block heat shrinkable tape winding layer material from entering annular sleeve (54).
8. A dry-type transformer lead structure according to claim 7, characterized in that Step (531) is formed at the connection of conductive sheet (53) and intermediate electrically conductive wire (3), and step (531) tightly contacts annular sleeve (54) located at insertion station.
9. A dry-type transformer lead structure according to claim 8, characterized in that, Annular sleeve (54) located at insertion station covers contact spring (52).