Lead insulation structure of dry-type transformer
By adopting a segmented casing and collar connection method in the lead insulation structure of the dry transformer, combined with the design of the insert block and sealing ring, the problem of loose or excessive pressure of the clamp under different weather conditions is solved, and the stability and flexibility of the insulation structure are achieved.
Patent Information
- Application Number
- CN202421782076.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The lead insulation structure of existing dry transformers is prone to loosening of clamps or excessive pressure under different weather conditions, resulting in offset or wear of the insulating sleeve, affecting the safety of use.
The casing structure is adopted in a segmented design, and threads are opened outside the casing connection, and a collar is used for connection. At the same time, the plug block is inserted inside the casing connection to prevent the casing from being offset.
It improves the stability of casing connection, avoids the impact of weather changes on the insulating structure, and enhances the flexibility and safety of use.
Smart Images
Figure CN222914537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a lead insulation structure of a dry-type transformer. Background Technique
[0002] With the continuous development of China's national economy, the demand for electricity in the whole society is increasing rapidly, and at the same time, higher requirements are put forward for the power supply quality. In order to meet the electricity demand, a dry-type transformer appears. Dry-type transformers are widely used in places such as local lighting, high-rise buildings, airports, docks, CNC machinery and equipment, etc. In order to ensure the use safety, insulation structures will be installed at positions such as high-voltage terminals, lead transition areas, lead clamping and supporting points.
[0003] In the prior art, the insulation structure installed on the lead part of a dry-type transformer is generally an insulating sleeve, that is, by sleeving the insulating sleeve at the connection of the lead, and then using a clamp to fix the position of the insulating sleeve to ensure that the insulating sleeve will not shift, thereby making the use safety relatively high.
[0004] However, the clamp is easily affected by thermal expansion. Therefore, when the weather is hot or cold, the clamp is likely to loosen or exert too much pressure on the insulating sleeve. When the clamp loosens, the insulating sleeve will shift or fail, thus affecting the insulation performance. When the clamp is too tight, the local stress on the insulating sleeve is too large, thereby increasing the risk of wear or damage to the insulating material, and thus making the use limitations relatively large. Content of the Utility Model
[0005] The purpose of the utility model is to provide a lead insulation structure of a dry-type transformer to solve the problems raised in the above background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A lead insulation structure of a dry-type transformer, including a first sleeve and three card slots. The right side of the first sleeve is fixedly connected with a second sleeve. The right side of the second sleeve is inserted with a third sleeve. The left side of the outer part of the third sleeve is threadedly connected with a collar. The left side of the inner part of the collar is threadedly connected to the outer part of the right end of the second sleeve.
[0007] Preferably, a plurality of slots are opened in the inner part of the right end of the second sleeve. Sealing grooves are opened on the inner walls of the slots. A plurality of insertion blocks are fixedly connected to the left end of the third sleeve. A plurality of sealing rings are fixedly connected to the outer parts of the insertion blocks.
[0008] Preferably, two clamping rings are fixedly connected to the inner part of the collar. A plurality of installation grooves are opened in the inner parts of the clamping rings. Rubber blocks are fixedly connected to the inner walls of the installation grooves. The other ends of the rubber blocks are fixedly connected with sliders. The ends of the sliders away from the rubber blocks are fixedly connected with limiting rods. A plurality of limiting blocks are opened on the inner walls of the card slots.
[0009] Preferably, a plurality of anti-slip ridges are fixedly connected to the outside of the collar, two of the clamping grooves are opened on the outside of the second sleeve, and the other clamping groove is opened on the outside of the third sleeve.
[0010] Preferably, the insertion block matches the insertion slot, and the insertion block is clamped inside the insertion slot.
[0011] Preferably, the sealing groove matches the sealing ring, and the sealing ring fits inside the sealing groove.
[0012] Preferably, the snap ring is engaged with the inside of the clamping groove, and the outside of the slider is slidably connected to the inside of the installation groove.
[0013] Preferably, the end of the limiting rod away from the slider is designed as an arc, the limiting rod matches the limiting block, and the limiting rod is clamped inside the limiting block.
[0014] Compared with the prior art, the beneficial effects of the present utility model are:
[0015] A lead insulation structure of a dry-type transformer proposed by the present utility model, by designing the sleeve in a segmented manner, opening threads on the outside of the connection of the sleeves, and then using a collar to connect the sleeves, and inserting an insertion block inside the connection of the sleeves, thereby preventing the sleeves from shifting, so that the connection stability of the sleeves is relatively high and is not affected by the weather, thus making the use flexibility relatively high. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a perspective view of the present utility model;
[0017] Figure 2 is a top view of the present utility model;
[0018] Figure 3 is the sectional view of the structure at A-A in the present utility model Figure 2 ;
[0019] Figure 4 is the enlarged view of the structure at A in the present utility model Figure 3 ;
[0020] Figure 5 is the enlarged view of the structure at B in the present utility model Figure 3 ;
[0021] Figure 6 is the schematic diagram of the structure of the first sleeve of the present utility model;
[0022] Figure 7 is the schematic diagram of the structure of the snap ring of the present utility model.
[0023] In the figure: 1. First sleeve; 2. Second sleeve; 3. Third sleeve; 4. Collar; 5. Slot; 6. Sealing groove; 7. Insert block; 8. Sealing ring; 9. Snap ring; 10. Installation groove; 11. Rubber block; 12. Slide block; 13. Limit rod; 14. Card slot; 15. Limit block. Specific implementation manner
[0024] In order to clearly and completely describe the purpose, technical solution of the present utility model and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.
[0025] Embodiment 1: Please refer to Figures 1 to 7 , the present utility model provides a technical solution: a lead insulation structure of a dry-type transformer, including a first sleeve 1 and three card slots 14. The right side of the first sleeve 1 is fixedly connected with a second sleeve 2. Two card slots 14 are opened outside the second sleeve 2. The right side of the second sleeve 2 is inserted with a third sleeve 3, so that the second sleeve 2 and the third sleeve 3 can be conveniently connected or disassembled. The first sleeve 1, the second sleeve 2 and the third sleeve 3 together form an insulating sleeve to protect the lead. Another card slot 14 is opened outside the third sleeve 3. The left side of the outside of the third sleeve 3 is threadedly connected with a collar 4. The outside of the collar 4 is fixedly connected with a plurality of anti-slip ridges, so that the collar 4 can be conveniently screwed. The left side of the inside of the collar 4 is threadedly connected to the outside of the right end of the second sleeve 2, so that the collar 4 can secondarily connect the second sleeve 2 and the third sleeve 3, so that the connection stability of the second sleeve 2 and the third sleeve 3 is relatively high.
[0026] When it is necessary to protect the connection of the lead, first, the first sleeve 1 and the second sleeve 2 are sleeved on one section of the lead, and the third sleeve 3 is sleeved on the other section of the lead. Then, when the two sections of the lead are connected, the third sleeve 3 can be inserted into the inside of the second sleeve 2. Then, the collar 4 is rotated, so that the collar 4 can slide from left to right. Then, the collar 4 can limit the connection between the third sleeve 3 and the second sleeve 2, so that the connection stability of the second sleeve 2 and the third sleeve 3 is higher, so that the sleeve will not shift and will not be affected by the weather, so that the use flexibility is relatively high.
[0027] Embodiment 2: On the basis of Embodiment 1, in order to achieve more stable insertion of the second sleeve 2 and the third sleeve 3 and facilitate replacement, a plurality of slots 5 are opened inside the right end of the second sleeve 2, and a plurality of sealing grooves 6 are opened on the inner wall of the slots 5. A plurality of insertion blocks 7 are fixedly connected to the left end of the third sleeve 3. The insertion blocks 7 are matched with the slots 5, and the insertion blocks 7 are clamped inside the slots 5, so that the connection between the second sleeve 2 and the third sleeve 3 is more stable. A plurality of sealing rings 8 are fixedly connected to the outside of the insertion blocks 7. The sealing grooves 6 are matched with the sealing rings 8, and the sealing rings 8 are attached to the inside of the sealing grooves 6, so as to increase the frictional force of the clamping connection between the insertion blocks 7 and the slots 5, and further make the connection between the second sleeve 2 and the third sleeve 3 more stable.
[0028] After the second sleeve 2 and the third sleeve 3 are connected, the sealing ring 8 can enter the inside of the slot 5. During this process, the sealing ring 8 can slide inside the slot 5, so that the sealing ring 8 can be extruded by the slot 5 to deform, so that the sealing ring 8 can perform a reset movement, and further make the sealing ring 8 fit the inside of the corresponding sealing groove 6, and further make the frictional force of the clamping connection between the insertion block 7 and the slot 5 larger, so that the clamping stability of the insertion block 7 and the slot 5 is higher, and further make the connection between the second sleeve 2 and the third sleeve 3 more stable. On the contrary, when the second sleeve 2 and the third sleeve 3 are separated, the sealing ring 8 can slide along the arc of the inner side of the sealing groove 6, so that the sealing ring 8 can be disengaged from the inside of the sealing groove 6, and further make the insertion block 7 can be disengaged from the inside of the slot 5, so that the second sleeve 2 and the third sleeve 3 can be conveniently disassembled and replaced.
[0029] Embodiment 3: On the basis of Embodiment 2, in order to achieve higher connection stability between the second sleeve 2 and the third sleeve 3, two clamping rings 9 are fixedly connected to the inner side of the collar 4. The inner side of the clamping rings 9 slides on the outside of the second sleeve 2, and the clamping rings 9 are engaged with the inside of the clamping grooves 14, so as to limit the position of the collar 4. A plurality of installation grooves 10 are opened inside the clamping rings 9. Rubber blocks 11 are fixedly connected to the inner walls of the installation grooves 10. The other ends of the rubber blocks 11 are fixedly connected with sliders 12. The outside of the sliders 12 slides inside the installation grooves 10. The installation grooves 10 play a role in limiting the sliders 12, so that the sliders 12 can slide smoothly. The ends of the sliders 12 away from the rubber blocks 11 are fixedly connected with limiting rods 13. The ends of the limiting rods 13 away from the sliders 12 are designed as arcs, so that the limiting rods 13 can slide conveniently inside the clamping grooves 14. A plurality of limiting blocks 15 are opened on the inner wall of the clamping grooves 14. The limiting rods 13 are matched with the limiting blocks 15, and the limiting rods 13 are clamped inside the limiting blocks 15, so as to further increase the clamping stability of the clamping rings 9.
[0030] When limiting the position of the collar 4, the double sleeve 2 and the triple sleeve 3, the two snap rings 9 can move along with the collar 4, so that the left snap ring 9 can move from the inside of the left slot 14 to the inside of the middle slot 14, and the right snap ring 9 can move from the inside of the middle slot 14 to the inside of the right slot 14, and the snap ring 9 is engaged with the slot 14 at the corresponding position. At this time, the rubber block 11 is no longer squeezed, and thus can push the slider 12 to move inward, so that the slider 12 can push the limit rod 13 to engage with the inside of the limit block 15, further making the engagement between the snap ring 9 and the slot 14 more stable, and further enabling the collar 4 to stably limit the double sleeve 2 and the triple sleeve 3, making the connection between the double sleeve 2 and the triple sleeve 3 more stable. On the contrary, by rotating the collar 4 in the reverse direction, the snap ring 9 can return to the initial position, and thus the double sleeve 2 and the triple sleeve 3 can be conveniently disassembled and replaced.
[0031] In actual use, when the second sleeve 2 is connected to the third sleeve 3, the sealing ring 8 can enter the inside of the slot 5. During this process, the sealing ring 8 can slide inside the slot 5, so that the sealing ring 8 can be extruded by the slot 5 to deform, enabling the sealing ring 8 to perform a reset movement, so that the sealing ring 8 can fit inside the corresponding sealing groove 6, so that the friction between the insertion block 7 and the slot 5 during clamping is relatively large, making the clamping stability between the insertion block 7 and the slot 5 higher, so that the connection between the second sleeve 2 and the third sleeve 3 is more stable. Then, by rotating the collar 4, the collar 4 can slide from left to right, and the two clamping rings 9 can move with the collar 4, enabling the left clamping ring 9 to move from the inside of the left slot 14 to the inside of the middle slot 14, and enabling the right clamping ring 9 to move from the inside of the middle slot 14 to the inside of the right slot 14, and making the clamping ring 9 engage with the corresponding slot 14. At this time, the rubber block 11 is no longer squeezed, and can then push the slider 12 to move inwards, so that the slider 12 can push the limiting rod 13 to engage with the inside of the limiting block 15, making the clamping between the clamping ring 9 and the slot 14 more stable, so that the collar 4 can stably limit the second sleeve 2 and the third sleeve 3, making the connection stability between the second sleeve 2 and the third sleeve 3 better, thus preventing the sleeve from shifting, making the connection stability of the sleeve higher and not being affected by the weather, making the use flexibility higher. On the contrary, when it is necessary to disassemble and replace the second sleeve 2 and the third sleeve 3, by rotating the collar 4 in the reverse direction, the clamping ring 9 can return to its initial position, so that the collar 4 no longer limits the connection between the second sleeve 2 and the third sleeve 3, and the second sleeve 2 and the third sleeve 3 can be separated. The sealing ring 8 can slide along the inner arc of the sealing groove 6, so that the sealing ring 8 can be disengaged from the inside of the sealing groove 6, and then the insertion block 7 can be disengaged from the inside of the slot 5, so that the second sleeve 2 and the third sleeve 3 can be conveniently disassembled and replaced, so that the aging first sleeve 1, second sleeve 2 and third sleeve 3 can be conveniently replaced, making the replacement efficiency higher, and not affecting the normal use of the dry-type transformer.
[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lead insulation structure for a dry-type transformer, comprising a bushing 1 (1) and three slots (14), wherein a bushing 2 (2) is fixedly connected to the right side of the bushing 1 (1), and characterized in that: The right side of the second sleeve (2) is plugged with the third sleeve (3), the left side of the outer side of the third sleeve (3) is threadedly connected with a collar (4), and the left side of the inner side of the collar (4) is threadedly connected to the outer right end of the second sleeve (2).
2. The lead insulation structure of a dry-type transformer according to claim 1, characterized in that: The right end of the second sleeve (2) is provided with a plurality of slots (5), the inner wall of the slots (5) is provided with a plurality of sealing grooves (6), the left end of the third sleeve (3) is fixedly connected with a plurality of plug-in blocks (7), the outside of the plug-in blocks (7) is fixedly connected with a plurality of sealing rings (8).
3. The lead insulation structure of a dry-type transformer according to claim 2, characterized in that: Two clamping rings (9) are fixedly connected to the inner side of the sleeve ring (4), a plurality of mounting grooves (10) are provided inside the clamping ring (9), a rubber block (11) is fixedly connected to the inner wall of the mounting groove (10), a slider (12) is fixedly connected to the other end of the rubber block (11), a limiting rod (13) is fixedly connected to one end of the slider (12) away from the rubber block (11), and a plurality of limiting blocks (15) are provided on the inner wall of the clamping groove (14).
4. The lead insulation structure of a dry-type transformer according to claim 1, characterized in that: The outside of the collar (4) is fixedly connected with a plurality of anti-slip convex strips, two of the clamping grooves (14) are opened on the outside of the second sleeve (2), and another of the clamping grooves (14) is opened on the outside of the third sleeve (3).
5. The lead insulation structure of a dry-type transformer according to claim 2, characterized in that: The insert block (7) matches the slot (5), and the insert block (7) is snap-fitted inside the slot (5).
6. The lead insulation structure of a dry-type transformer according to claim 2, characterized in that: The sealing groove (6) matches the sealing ring (8), and the sealing ring (8) fits the inside of the sealing groove (6).
7. The lead insulation structure of a dry-type transformer according to claim 3, characterized in that: The clamping ring (9) is engaged with the inside of the clamping groove (14), and the outside of the sliding block (12) is slidably connected to the inside of the installation groove (10).
8. The lead insulation structure of a dry-type transformer according to claim 3, characterized in that: One end of the limiting rod (13) away from the sliding block (12) is designed as an arc, the limiting rod (13) matches the limiting block (15), and the limiting rod (13) is clamped inside the limiting block (15).