High-performance coil end insulator

Abstract

The utility model relates to the technical field of coils, and discloses a high-performance coil end insulator, which comprises a coil and an iron yoke arranged at the middle end of the coil, two groups of mutually symmetrical insulating end covers are arranged at the two ends of the iron yoke, and two groups of mutually symmetrical limiting components are arranged at the two ends of the outer wall, far away from the coil, of the insulating end covers. The two sides of the outer wall of the insulating end cover are provided with two groups of symmetrical protection assemblies in an inserted manner. The insulation end cover is made of epoxy impregnated paper and epoxy resin composite insulation materials, has the dielectric property of insulation paper and the mechanical strength of epoxy resin, forms a compact and compact integrated structure, can effectively control electric field distribution, reduces local electric field intensity, reduces electric arc and discharge risks, can form a uniform and compact insulation layer after epoxy resin pouring, and improves the service life of the insulation end cover. The epoxy resin can effectively prevent moisture, pollutants and the like from entering the coil, and the tensile strength and the impact resistance of the cable accessory can be effectively improved due to the fact that the epoxy resin has good mechanical properties.

Description

Technical Field

[0001] This utility model relates to the field of coil technology, and in particular to a high-performance coil end insulation. Background Technology

[0002] Because the coil has right angles (sharp angles) at its ends, the electric field is concentrated at the sharp angles, which is prone to discharge. In order to avoid the electric field being too concentrated, end insulation is added to both ends of the coil. The material for the end insulation of conventional dry-type iron core reactors is usually 0.5mm epoxy board or DMD paper, which is stacked to the same thickness as the coil. The end insulation should be made of insulating material with a relatively high permittivity. Usually, the relative permittivity is several times greater than that of air, which reduces the electric field strength by several times. Another problem with end insulation is to prevent the coil from discharging or creeping to the iron core or yoke.

[0003] The end insulation and the coil should be in as close contact as possible to avoid air gap discharge. However, the epoxy board or DMD used for the end insulation of existing coils is formed by stacking layers to form a circle, so there will be many gaps between the end insulation and the coil, which cannot prevent the coil from creeping at the end. Utility Model Content

[0004] Given that the end insulation and the coil should be in as close contact as possible to avoid air gap discharge, the epoxy board or DMD used for the end insulation of existing coils is formed by stacking layers to form a circle, so there will be many gaps between the end insulation and the coil, which cannot prevent the problem of coil creep at the end. Therefore, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-performance coil end insulation, including a coil and an iron yoke disposed at the middle end of the coil. The iron yoke has two sets of mutually symmetrical insulating end caps at both ends. The insulating end caps have two sets of mutually symmetrical limiting components at the two ends of the outer wall away from the coil. The insulating end caps have two sets of mutually symmetrical protective components inserted on both sides of the outer wall of the insulating end caps. The protective components include a rubber pad inserted into the outer wall of the insulating end caps, a sponge pad inserted into the inner wall of the rubber pad, a second insulating sleeve inserted into the inner wall of the sponge pad, and a terminal wire inserted into the middle of the second insulating sleeve.

[0006] As a preferred embodiment of the high-performance coil end insulation of this utility model, the insulating end cap is an insulating material composed of epoxy impregnated paper and epoxy resin.

[0007] As a preferred embodiment of the high-performance coil end insulation of this utility model, the limiting component includes a limiting frame fixedly disposed on the outer wall of the insulating end cover, a sliding plate movably inserted into the middle of the limiting frame, a limiting rod fixedly inserted into the middle of the sliding plate, the limiting rod movably passing through the middle of the limiting frame, a first insulating sleeve sleeved on the outer wall of the front end of the limiting rod, and an insertion hole that mates with the first insulating sleeve opened on the outer wall of the yoke, the first insulating sleeve being movably inserted into the insertion hole.

[0008] As a preferred embodiment of the high-performance coil end insulation of this utility model, the limiting rod is movably sleeved with a spring on the outer wall inside the limiting frame, and the two ends of the spring are fixedly connected to the limiting frame and the sliding plate, respectively.

[0009] As a preferred embodiment of the high-performance coil end insulation of this utility model, a disc is fixedly provided at the end of the limiting rod away from the first insulating sleeve.

[0010] As a preferred embodiment of the high-performance coil end insulation of this utility model, a third insulating sleeve is fixedly inserted into the middle of the insulating end cover, and the third insulating sleeve is in contact with the outer wall of the iron yoke.

[0011] As a preferred embodiment of the high-performance coil end insulation of this utility model, the rubber pad is connected to the coil, and the third insulating sleeve and the second insulating sleeve are made of polyimide.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] 1. In this utility model, the insulating end cap is made of epoxy impregnated paper and epoxy resin composite insulating material, which combines the dielectric properties of insulating paper and the mechanical strength of epoxy resin to form a dense and compact integrated structure. This structure can effectively control the electric field distribution, reduce the local electric field intensity, and reduce the risk of arcing and discharge. After the epoxy resin is cast, a uniform and dense insulating layer can be formed, which can effectively prevent moisture, contaminants and other substances from entering the coil. Since epoxy resin itself has good mechanical properties, it can effectively improve the tensile strength and impact resistance of cable accessories.

[0014] 2. In this utility model, pulling the discs at both ends causes the sliding plate to slide along the inner wall of the limiting frame to compress the spring. Then, the insulating end caps are fitted onto both ends of the coil along the outer wall of the yoke. Releasing the sliding plate causes the limiting rod to insert the first insulating sleeve into the insertion hole of the yoke under the reverse elastic force of the spring, which makes it easy for workers to quickly install the insulating end caps. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the high-performance coil end insulation of this utility model;

[0016] Figure 2 This is a three-dimensional cross-sectional view of the limiting component for high-performance coil end insulation of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the high-performance coil end insulation protective component of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Coil; 2. Yoke; 3. Limiting assembly; 31. Limiting frame; 32. Slide plate; 33. Limiting rod; 34. Disc; 35. First insulating sleeve; 36. Spring; 4. Protective assembly; 41. Rubber pad; 42. Sponge pad; 43. Second insulating sleeve; 44. End wire; 5. Insulating end cap; 6. Third insulating sleeve. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Example 1

[0022] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a high-performance coil end insulation. This high-performance coil end insulation includes a coil 1 and an iron yoke 2 located at the middle end of the coil 1. The iron yoke 2 has two sets of mutually symmetrical insulating end caps 5 at both ends. The insulating end caps 5 have two sets of mutually symmetrical limiting components 3 at both ends away from the outer wall of the coil 1. The insulating end caps 5 have two sets of mutually symmetrical protective components 4 inserted on both sides of the outer wall of the insulating end caps 5. The protective components 4 include a rubber pad 41 inserted into the outer wall of the insulating end caps 5. A sponge pad 42 is inserted into the inner wall of the rubber pad 41. A second insulating sleeve 43 is inserted into the inner wall of the sponge pad 42. A terminal wire 44 is inserted into the middle of the second insulating sleeve 43.

[0023] The insulating end cap 5 is made of an insulating material composed of epoxy impregnated paper and epoxy resin.

[0024] The limiting component 3 includes a limiting frame 31 fixedly mounted on the outer wall of the insulating end cap 5. A sliding plate 32 is movably inserted into the middle of the limiting frame 31. A limiting rod 33 is fixedly inserted into the middle of the sliding plate 32. The limiting rod 33 movably passes through the middle of the limiting frame 31. A first insulating sleeve 35 is sleeved on the outer wall of the front end of the limiting rod 33. An insertion hole that mates with the first insulating sleeve 35 is opened on the outer wall of the yoke 2. The first insulating sleeve 35 is movably inserted into the insertion hole. A spring 36 is movably sleeved on the outer wall of the limiting rod 33 located inside the limiting frame 31. The two ends of the spring 36 are... The limiting rod 33 is fixedly connected to the limiting frame 31 and the sliding plate 32. A disc 34 is fixedly provided at the end of the limiting rod 33 away from the first insulating sleeve 35. Pulling the disc 34 to both ends causes the sliding plate 32 to slide along the inner wall of the limiting frame 31 to compress the spring 36. Then, the insulating end cap 5 is fitted onto both ends of the coil 1 along the outer wall of the yoke 2. The sliding plate 32 is released. Under the reverse elastic force of the spring 36, the limiting rod 33 causes the first insulating sleeve 35 to be inserted into the insertion hole opened in the yoke 2, so that the staff can quickly install the insulating end cap 5.

[0025] A third insulating sleeve 6 is fixedly inserted into the middle of the insulating end cap 5, and the third insulating sleeve 6 is in contact with the outer wall of the iron yoke 2.

[0026] The rubber pad 41 is connected to the coil 1, and the third insulating sleeve 6 and the second insulating sleeve 43 are made of polyimide.

[0027] The insulating end cap 5 is made of epoxy impregnated paper and epoxy resin composite insulating material, which combines the dielectric properties of insulating paper and the mechanical strength of epoxy resin to form a dense and compact integrated structure. This structure can effectively control the electric field distribution, reduce the local electric field intensity, and reduce the risk of arcing and discharge. After the epoxy resin is cast, it can form a uniform and dense insulating layer, which can effectively prevent moisture, contaminants and other substances from entering the coil 1. Since epoxy resin itself has good mechanical properties, it can effectively improve the tensile strength and impact resistance of cable accessories. The rubber pad 41 and the sponge pad 42 can effectively protect the end wire 44 and reduce the wear problem of the end wire 44 during use.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-performance coil end insulation, comprising a coil (1) and a yoke (2) disposed at the middle end of the coil (1), characterized in that: The iron yoke (2) has two sets of symmetrical insulating end caps (5) at both ends. The outer walls of the insulating end caps (5) away from the coil (1) have two sets of symmetrical limiting components (3). The outer walls of the insulating end caps (5) have two sets of symmetrical protective components (4) inserted on both sides. The protective components (4) include a rubber pad (41) inserted into the outer wall of the insulating end caps (5). The inner wall of the rubber pad (41) has a sponge pad (42) inserted into it. The inner wall of the sponge pad (42) has a second insulating sleeve (43) inserted into it. The middle of the second insulating sleeve (43) has a terminal wire (44) inserted into it.

2. The high-performance coil end insulation according to claim 1, characterized in that: The insulating end cap (5) is an insulating material made of epoxy impregnated paper and epoxy resin.

3. The high-performance coil end insulation according to claim 1, characterized in that: The limiting component (3) includes a limiting frame (31) fixedly disposed on the outer wall of the insulating end cap (5). A sliding plate (32) is movably inserted into the middle of the limiting frame (31). A limiting rod (33) is fixedly inserted into the middle of the sliding plate (32). The limiting rod (33) movably passes through the middle of the limiting frame (31). A first insulating sleeve (35) is sleeved on the outer wall of the front end of the limiting rod (33). An insertion hole that mates with the first insulating sleeve (35) is opened on the outer wall of the yoke (2). The first insulating sleeve (35) is movably inserted into the insertion hole.

4. The high-performance coil end insulation according to claim 3, characterized in that: The limiting rod (33) is movably sleeved with a spring (36) on the outer wall inside the limiting frame (31). The two ends of the spring (36) are fixedly connected to the limiting frame (31) and the sliding plate (32) respectively.

5. The high-performance coil end insulation according to claim 3, characterized in that: A disc (34) is fixedly provided at the end of the limiting rod (33) away from the first insulating sleeve (35).

6. The high-performance coil end insulation according to claim 1, characterized in that: The insulating end cap (5) is fixedly inserted with a third insulating sleeve (6) at the middle end, and the third insulating sleeve (6) is in contact with the outer wall of the iron yoke (2).

7. The high-performance coil end insulation according to claim 6, characterized in that: The rubber pad (41) is connected to the coil (1), and the third insulating sleeve (6) and the second insulating sleeve (43) are made of polyimide.

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