Internal water-cooled dry-type transformer cast coil
By using a detachable cooling circulation pipe with internal water cooling design and a split S-shaped winding structure, the problems of slow heat dissipation and difficult maintenance of dry-type transformers are solved, achieving rapid heat dissipation and convenient maintenance, and improving the stability and safety of the transformer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-04
- Publication Date
- 2026-03-10
AI Technical Summary
Existing dry-type transformers have poor heat dissipation performance, especially large transformers. The air heat exchange rate is slow, and adding air ducts will increase costs and complexity, making maintenance difficult. Furthermore, liquid heat exchange pipes are difficult to remove and maintain.
It adopts an internal water cooling design, which uses a detachable cooling circulation pipe set in the cast insulation ring to quickly dissipate heat by circulating coolant. The pipe is designed as a split S-shaped coil, which is fixed by the plug slot and coil cover to ensure structural stability and sealing.
It achieves rapid heat dissipation, reduces coil temperature, improves transformer operating stability and lifespan, facilitates maintenance, reduces repair costs, and enhances safety and reliability.
Smart Images
Figure CN223986479U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pouring coil technical field, concretely is a dry type transformer pouring coil of internal water cooling. BACKGROUND
[0002] At present, the known dry type transformer foil winding pouring coil, when improving ventilation and heat dissipation in design consideration, generally increases air channel, improves the heat dissipation effect of the coil through the way of increasing the heat dissipation surface, but the heat dissipation speed through air heat exchange is slow, and too much increase of air channel also correspondingly increases more cost (the size of the iron core and coil increases), especially the coil with slightly larger capacity, which involves increasing multilayer air channel. At the same time, too much increase of air channel can bring a series of problems. On the one hand, it increases the production cost, because the size of the iron core and coil will increase correspondingly. Taking the common S11-M-100 / 10 type dry type transformer as an example, when the number of air channels is increased, the size of the iron core and coil may need to increase by 10%-20% on the basis of the original, which not only increases the use amount of raw materials, but also improves the processing difficulty and cost. On the other hand, especially for the coil with slightly larger capacity, it involves increasing multilayer air channel. The design and manufacture of multilayer air channel are more complex, and in actual operation, the maintenance and cleaning of the air channel also become more difficult, which is easy to affect the heat dissipation effect due to dust accumulation and other problems.
[0003] In actual application, the above-mentioned air heat exchange mode is not suitable for large transformers. If simply changed to liquid heat exchange, the pipeline is difficult to remove, and in the prior art, the insulation ring is mostly made by integral pouring molding, and it is more difficult to replace and repair.
[0004] In order to solve the above problems, we propose a dry type transformer pouring coil of internal water cooling. Utility model content
[0005] The utility model aims at providing a dry type transformer pouring coil of internal water cooling to solve the problems in the above background art.
[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a dry type transformer pouring coil of internal water cooling, comprising a pouring insulation ring and a cooling circulating pipeline; the pouring insulation ring is detachably connected with the cooling circulating pipeline; the cooling circulating pipeline comprises a first circulating pipeline, a second circulating pipeline, a water inlet and a water outlet; one end of the first circulating pipeline is communicated with one end of the second circulating pipeline; the other end of the first circulating pipeline is provided with the water inlet; the other end of the second circulating pipeline is provided with the water outlet.
[0007] Preferably, the pouring insulation ring is provided with three pipeline grooves and two coil grooves; one coil groove is arranged between the two pipeline grooves; the cooling circulation pipeline is detachably connected in the pipeline groove; and the heat dissipation coil is arranged in the coil groove.
[0008] Preferably, the pouring insulation ring comprises a first pouring half ring and a second pouring half ring; and the first pouring half ring is buckled to the second pouring half ring.
[0009] Preferably, the side surface of the first pouring half ring, which is buckled to the second pouring half ring, is provided with a plug-in groove and a plug-in block; the side surface of the second pouring half ring, which is buckled to the first pouring half ring, is also provided with a plug-in groove and a plug-in block; and the plug-in groove on the second pouring half ring is matched with the plug-in block on the first pouring half ring.
[0010] Preferably, the pouring insulation ring further comprises a coil cover; the coil cover is buckled to the top surface of the first pouring half ring and the top surface of the second pouring half ring; and the coil cover is provided with a plurality of openings for penetrating the water inlet and the water outlet.
[0011] Preferably, the bottom surface of the coil cover is provided with an annular protrusion; and the annular protrusion of the bottom surface of the coil cover is plugged into the pipeline groove and the coil groove.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] Good heat dissipation effect: the cooling liquid in the cooling circulation pipeline circulates and flows, which can quickly take away the heat generated by the coil; compared with the traditional air heat exchange mode, the heat dissipation speed is faster, the coil temperature can be effectively reduced, and the operation stability and service life of the transformer are improved.
[0014] Convenient maintenance: the cooling circulation pipeline is detachably connected with the pouring insulation ring, and the pouring insulation ring adopts a split structure; when the cooling circulation pipeline fails or needs to be maintained, the cooling circulation pipeline can be conveniently disassembled and replaced, thereby reducing the maintenance cost and time.
[0015] Stable structure: through the cooperation of the plug-in groove and the plug-in block and the fixation of the coil cover, the stability and sealing performance of the entire pouring coil structure are ensured, the leakage of the cooling liquid and the entry of foreign matters from the outside are effectively prevented, and the safety and reliability of the transformer are improved.
[0016] Novel pipeline design: the cooling circulation pipeline adopts the design that the first circulation pipeline and the second circulation pipeline are sequentially coiled, which can further improve the heat exchange efficiency compared with the traditional spiral design from top to bottom. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the utility model;
[0018] Figure 2 It is the structure schematic view of the cooling circulation pipeline in the utility model;
[0019] Figure 3 It is the structure main view schematic view of the second pouring half circle in the utility model.
[0020] In the drawing: 1-pouring insulation circle, 11-first pouring half circle, 12-coil cover, 13-second pouring half circle, 14-pipeline groove, 15-coil groove, 16-plug-in groove, 17-plug-in block, 2-cooling circulation pipeline, 21-first circulation pipeline, 22-second circulation pipeline, 23-water inlet, 24-water outlet. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 The utility model provides a kind of technical scheme: a dry-type transformer pouring coil of inner water cooling, including pouring insulation circle 1 and cooling circulation pipeline 2, the pouring insulation circle 1 is made of material of high strength, high insulation performance, for example, epoxy resin with model number E-44, with good electrical insulation performance and mechanical properties, can effectively protect coil internal structure. The cooling circulation pipeline 2 can be detachably connected in the pouring insulation circle 1, and this detachable connection mode is convenient for later maintenance and replacement of the cooling circulation pipeline 2.
[0023] The cooling circulation pipeline 2 includes first circulation pipeline 21, second circulation pipeline 22, water inlet 23 and water outlet 24. The first circulation pipeline 21 and second circulation pipeline 22 select stainless steel pipe with inner diameter of 10mm and wall thickness of 1.5mm, and stainless steel material has good corrosion resistance and thermal conductivity, to ensure that cooling liquid flows smoothly in the pipeline and effectively takes away heat. One end of the first circulation pipeline 21 is communicated with one end of the second circulation pipeline 22, to form the circulation channel of cooling liquid;The other end of the first circulation pipeline 21 is provided with water inlet 23 for connecting cooling liquid;The other end of the second circulation pipeline 22 is provided with water outlet 24 for discharging cooling liquid after absorbing heat.
[0024] The cast insulating ring 1 has three pipe grooves 14 and two coil grooves 15, with one coil groove 15 located between the two pipe grooves 14. The cooling circulation pipe 2 is detachably connected to the pipe groove 14, facilitating its installation and removal. A heat dissipation ring is coiled inside the coil groove 15. The heat dissipation ring can be made of foil material. Metal foil material has good thermal conductivity and is used for heat dissipation components of electronic devices, which can quickly conduct away the heat generated by electronic components, ensuring stable operation of the equipment. Copper foil also has good electrical conductivity.
[0025] like Figure 2 As shown, the cooling circulation pipe 2 is arranged in a split structure and is wrapped around the pipe groove 14. Specifically, the first circulation pipe 21 first spirals along one half of the inner side of the pipe groove 14 in an S-shape, and then extends to the other half of the inner side of the pipe groove 14 after reaching the bottom. The second circulation pipe 22 continues to spiral in an S-shape, and so on, until the top of the pipe groove 14.
[0026] The split-loop design of the cooling circulation pipe 2 increases the spatial diversity of the contact area between the cooling circulation pipe 2 and the pipe groove 14, enabling more efficient heat exchange with the surrounding medium. Simultaneously, the turbulence of the coolant during flow helps break the thermal boundary layer, resulting in greater coolant circulation and further improving heat exchange efficiency. In contrast, ordinary coiled pipes may not perform as well in heat exchange as this split-loop design due to the instability of fluid flow.
[0027] The split-loop design of the cooling circulation pipe 2 can better adapt to the shape of the cylinder and make full use of the space on both sides of the cylinder of the pipe groove 14. The length and capacity of the cooling circulation pipe 2 can be increased without significantly increasing the overall equipment size, thereby improving the heat exchange effect. Ordinary coiled pipes may not be flexible enough in terms of space utilization and it is difficult to achieve efficient pipe layout in a limited space.
[0028] The cast insulating ring 1 includes a first cast semi-circle 11 and a second cast semi-circle 13. The first cast semi-circle 11 is fastened to the second cast semi-circle 13. This split structure facilitates the installation and disassembly of internal components. The side of the first cast semi-circle 11 that fastens to the second cast semi-circle 13 is provided with a insertion groove 16 and an insertion block 17. The side of the second cast semi-circle 13 that fastens to the first cast semi-circle 11 is also provided with an insertion groove 16 and an insertion block 17. The insertion groove 16 on the second cast semi-circle 13 cooperates with the insertion block 17 on the first cast semi-circle 11. This insertion structure ensures the tightness and stability of the fastening between the first cast semi-circle 11 and the second cast semi-circle 13.
[0029] The cast insulating ring 1 also includes a coil cover 12, which is fastened to the top surface of the first cast semi-ring 11 and the top surface of the second cast semi-ring 13, serving to protect the internal structure. The coil cover 12 has multiple openings for the water inlet 23 and the water outlet 24 to facilitate the entry and exit of coolant. The bottom surface of the coil cover 12 has an annular protrusion, which is inserted into the pipe groove 14 and the coil groove 15, further enhancing the connection stability between the coil cover 12 and the cast insulating ring 1.
[0030] Working principle:
[0031] The inlet 23 is connected to the coolant supply system, and the outlet 24 is connected to the coolant recovery system. During transformer operation, coolant enters the cooling circulation pipe 2 through the inlet 23, absorbs the heat generated by the coil, and then flows out through the outlet 24. Through the circulation of the coolant supply and recovery system, continuous cooling of the coil is achieved. When maintenance or replacement of the cooling circulation pipe 2 is required, simply open the coil cover 12 and disassemble the cooling circulation pipe 2.
[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An inner water-cooled dry-type transformer cast coil, characterized by, Including pouring insulation ring (1) and cooling circulating pipeline (2), the detachable connection of pouring insulation ring (1) in cooling circulating pipeline (2), cooling circulating pipeline (2) includes first circulating pipeline (21), second circulating pipeline (22), water inlet (23) and water outlet (24), the first circulating pipeline (21) one end is communicated with the second circulating pipeline (22) one end, the first circulating pipeline (21) other end is equipped with water inlet (23), the second circulating pipeline (22) other end is equipped with water outlet (24).
2. An inner water cooled dry-type transformer cast coil according to claim 1, characterized in that, Pouring insulation ring (1) is provided with three pipeline grooves (14) and two coil grooves (15), one coil groove (15) is arranged between two pipeline grooves (14), pipeline groove (14) is detachably connected with cooling circulating pipeline (2), coil groove (15) is provided with heat dissipation coil.
3. An inner water cooled dry-type transformer cast coil according to claim 2, characterized in that, Pouring insulation ring (1) includes first pouring half circle (11) and second pouring half circle (13), first pouring half circle (11) is buckled on second pouring half circle (13).
4. An inner water cooled dry-type transformer cast coil according to claim 3, characterized in that, The side of first pouring half circle (11) buckled with second pouring half circle (13) is provided with plug-in groove (16) and plug-in block (17), the side of second pouring half circle (13) buckled with first pouring half circle (11) is also provided with plug-in groove (16) and plug-in block (17), the plug-in groove (16) on second pouring half circle (13) is matched with the plug-in block (17) on first pouring half circle (11).
5. An inner water cooled dry-type transformer cast coil according to claim 3, characterized in that, Pouring insulation ring (1) further includes coil cover (12), coil cover (12) is buckled on the top surface of first pouring half circle (11) and second pouring half circle (13), coil cover (12) is provided with a plurality of openings for penetrating water inlet (23) and water outlet (24).
6. An inner water cooled dry-type transformer cast coil according to claim 5, characterized in that, The bottom surface of coil cover (12) is provided with annular protrusion, and the annular protrusion of the bottom surface of coil cover (12) is inserted into pipeline groove (14) and coil groove (15).