Insulating sleeve of wire

Abstract

The invention relates to an insulating sleeve of a wire, which comprises tubular buses, the two tubular buses are connected through a connecting piece, and the connecting piece comprises a connecting section, a conductor column and an outer cylinder assembly; each tubular bus is connected with a connecting section, one end, far away from the tubular bus, of each connecting section is provided with a conductor column, the two conductor columns are in butt joint and contact with each other, and the outer cylinder assembly sleeves the peripheries of the two connecting sections, the two conductor columns and the two tubular buses. The joints of the tubular busbar and the connecting section are connected more stably through the closed connection effect of the stress dispersion cone, the side sleeve and the filler, the stress is dispersed, and the tubular busbar and the connecting section are more difficult to break; concentrated electric stress can be dispersed at the joint of the tubular bus and the connecting section through the stress dispersion cone.

Description

Technical Field

[0001] The invention belongs to the field of insulating sleeves, in particular to an insulating sleeve for a conductor. Background Art

[0002] In the actual production process, the existing technology requires precise measurement of the thickness of the insulating corrugated impregnated paper wrapped around each layer and the size of the withdrawn shielding layer. The shielding layers between the layers are all wrapped with semi-conductive corrugated impregnated paper.

[0003] The insulation thickness between layers must meet the standard and be uniform. The semi-conductive corrugated impregnated paper must not only be accurately sized layer by layer, but also must be wrapped without forming sharp points (forming electric field concentration points, damaging insulation, and reducing product life). This places high demands on the control of the production process, the personnel are highly dispersed, and the product stability is seriously affected, resulting in a long delivery time for the products of this process, which is difficult to meet the engineering progress requirements, especially for large projects.

[0004] The existing process for connection insulation treatment can only use the shielding tube method. The shielding tube is not only expensive, but also heavy. Both ends are fixed to the busbar surface with seals, which are large in size. The large amount of air inside the shielding tube expands and contracts due to heat and cold, forming an internal and external air pressure difference, which forms a constantly changing force on the seal. There is a risk of maintaining the sealing of the shielding tube for a long time. In actual applications, occasional shielding tube leakage causing busbar failure has always been a headache for technicians, which has restricted the widespread use of this process. Therefore, an insulating sleeve for a conductor is proposed. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the following technical problems in the prior art: the connection insulation treatment of the epoxy resin impregnated cast tubular busbar in the existing process can only adopt the shielding tube method. The shielding tube is not only expensive and heavy, but also fixed to the busbar surface with seals at both ends, which is large in size. The large amount of air inside the shielding tube expands and contracts due to heat and cold, forming an internal and external air pressure difference, which forms a constantly changing force on the seal. There is a risk of maintaining the sealing of the shielding tube for a long time. In actual applications, occasional shielding tube leakage causing busbar failure has always been a headache for technicians.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an insulating sleeve for a conductor, comprising a tubular busbar, two tubular busbars are connected by a connector, and the connector comprises a connecting section, a conductor column and an outer tube assembly;

[0008] Each of the tubular busbars is connected to a connecting section, and a conductor column is arranged at one end of the connecting section away from the tubular busbar, and two conductor columns are butted and contacted, and the outer cylinder assembly is sleeved on the outer circumference of the two connecting sections, the two conductor columns and the two tubular busbars;

[0009] The outer cylinder assembly includes a middle sleeve and a side sleeve. A side sleeve is respectively provided at both ends of the middle sleeve. The middle sleeve is a cylindrical shell, and the side sleeve is a truncated cone shell. A positioning line is provided on the tubular busbar.

[0010] As a preferred technical solution for the insulating sleeve of a conductor, an inner shielding layer is connected between the two connecting sections, an insulating shielding layer is sleeved on the outer side of the inner shielding layer, the inner shielding layer is sleeved on the outer side of the connecting section, and the conductor column is located in the inner shielding layer;

[0011] The inner shielding layer makes the electric field on the insulating surface of the insulating shielding layer uniform, thereby preventing the electric field from being concentrated in the middle position and causing the structure of the insulating shielding layer to be destroyed;

[0012] The insulating shielding layer can further shield the electric field and isolate the insulating shielding layer and the filler to prevent the electric field from concentrating and attacking the filler.

[0013] As a preferred technical solution for an insulating sleeve of a conductor, an outer-wrapped joint is wrapped around the outer circumference of two conductor posts, the outer-wrapped joint is formed by cross-weaving of metal wires, and the outer side of the outer-wrapped joint is connected to the inner side of the inner shielding layer;

[0014] The externally wrapped connector can carry current and electrically connect the two conductor posts.

[0015] As a preferred technical solution for an insulating sleeve of a conductor, the outer tube assembly is filled with a filler, and the material of the filler is epoxy resin;

[0016] The epoxy resin is impregnated under vacuum, and after the impregnation is complete, the temperature is adjusted for high-temperature curing to form a solid insulation structure with excellent performance.

[0017] As a preferred technical solution for the insulating sleeve of a conductor, epoxy resin wraps the insulating shielding layer, the connecting section and the part of the tubular busbar located inside the outer tube assembly;

[0018] Epoxy resin is wrapped around the insulating shielding layer, the connecting section and the tubular busbar to provide good insulation.

[0019] As a preferred technical solution for an insulating sleeve of a conductor, a stress dispersing cone is sheathed at the connection between the tubular busbar and the connecting section, and the stress dispersing cone is a truncated cone-shaped shell;

[0020] The stress dispersion vertebral body comprises a vertebral body, an outer contact surface, an inner contact surface, a transition surface 1, a transition surface 2, a transition surface 3, a resistance surface and a transition surface 4. The middle part of the inner side of the vertebral body is the inner contact surface, the inner contact surface is a cylindrical surface, the bottom end of the inner contact surface is connected to the transition surface 1, the transition surface 1 is connected to the transition surface 2, the transition surface 1 and the transition surface 2 are both arc surfaces, and the radius of the transition surface 1 is 2.4 times the radius of the transition surface 2;

[0021] The arc where the arc surface of the transition surface one is located is a quarter of a circle, the arc where the arc surface of the transition surface two is located is a half of a circle, the outer side of the transition surface two is connected to the outer contact surface, the outer contact surface is an inclined curved surface, the angle between the outer contact surface and the vertical surface is 23 degrees, the outer contact surface is connected to the resistance surface through the transition surface four, and the resistance surface is connected to the top of the inner contact surface through the transition surface three;

[0022] The vertebral body is made of a polymer composite material with a special dielectric constant, and the polymer composite material with a special dielectric constant is an elastic material with a dielectric constant less than 0.3.

[0023] The stress dispersing cone is located at the joint of the tubular busbar and the connecting section, and can evacuate the concentrated electrical stress.

[0024] As a preferred technical solution for an insulating sleeve of a conductor, the diameter of the conductor column is 2 / 3 to 3 / 4 of the diameter of the connecting section.

[0025] As a preferred technical solution for an insulating sleeve of a conductor, an elastic ring 1 is provided in the middle of the circumference of the intermediate sleeve, and the cross section of the elastic ring 1 is semicircular;

[0026] The elastic ring 1 can increase the deformation and expansion amount of the intermediate sleeve, thereby improving the mechanical properties of the intermediate sleeve and increasing the toughness of the intermediate sleeve.

[0027] As a preferred technical solution for an insulating sleeve of a conductor, the diameter of the end of the side sleeve away from the middle sleeve is smaller than the diameter of the end of the side sleeve close to the middle sleeve, and an elastic ring 2 is arranged on the outer side of the end with a smaller diameter, and the cross section of the elastic ring 2 is semicircular, and the inclination angle of the side sleeve is the same as the inclination angle of the stress dispersion cone;

[0028] The middle sleeve can constrain the shape of the side sleeves, reduce the deformation of the side sleeve openings, constrain the stress dispersing vertebral body within the side sleeves, and ensure that the stress dispersing vertebral body can perform its function.

[0029] The insulating sleeve of the conductor of the present invention has the beneficial effects that the joint of the tubular busbar and the connecting section is connected by the closed connection of the stress dispersing cone, the side sleeve and the filler, so that the connection is more stable, the stress is dispersed, and it is less likely to be disconnected;

[0030] The concentrated electrical stress can be dispersed at the joint between the tubular busbar and the connecting section through the stress dissipation cone;

[0031] The transition parts of each surface of the vertebral body are made smooth by transition surface 1, transition surface 2, transition surface 3 and transition surface 4, which can disperse stress and avoid stress concentration, thereby preventing the stress generated after the vertebral body is compressed from damaging the structure of the filler and ensuring the sealing performance;

[0032] Through the use of fillers, the solid insulation fits tightly against the conductor, there is no problem of difficulty in sealing the joints, the volume is smaller, the space occupied is small, and the installation is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0034] Figure 1 It is a schematic diagram of the cross-sectional structure of the front side of the present invention;

[0035] Figure 2 It is a schematic diagram of the three-dimensional structure of the stress dispersion vertebral body of the present invention;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of the stress dispersion cone of the present invention.

[0037] Figure numerals: 1. tubular busbar; 2. connecting section; 3. stress dispersion cone; 4. elastic ring one; 5. intermediate sleeve; 6. positioning line; 7. side sleeve; 8. elastic ring two; 9. filler; 10. conductor column; 11. outward-wrapped joint; 12. inner shielding layer; 13. insulating shielding layer; 301. cone; 302. outer contact surface; 303. inner contact surface; 304. transition surface one; 305. transition surface two; 306. transition surface three; 307. resistance surface; 308. transition surface four; 309. connecting block. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0042] like Figure 1-3 As shown, the present invention provides an insulating sleeve for a conductor, which can be used as a busbar, comprising a tubular busbar 1, two tubular busbars 1 are connected by a connector, and the connector comprises a connecting section 2, a conductor column 10 and an outer tube assembly;

[0043] Each of the tubular busbars 1 is connected to a connecting section 2, and a conductor column 10 is provided at one end of the connecting section 2 away from the tubular busbar 1, and two conductor columns 10 are butted and contacted, and the outer cylinder assembly is sleeved on the outer circumference of the two connecting sections 2, the two conductor columns 10 and the two tubular busbars 1;

[0044] The outer cylinder assembly includes a middle sleeve 5 and a side sleeve 7. A side sleeve 7 is respectively provided at both ends of the middle sleeve 5. The middle sleeve 5 is a cylindrical shell, and the side sleeve 7 is a truncated cone shell. A positioning line 6 is provided on the tubular busbar 1.

[0045] An inner shielding layer 12 is connected between the two connecting sections 2, an insulating shielding layer 13 is sleeved outside the inner shielding layer 12, the inner shielding layer 12 is sleeved outside the connecting section 2, and the conductor post 10 is located inside the inner shielding layer 12;

[0046] The inner shielding layer 12 makes the electric field on the insulating surface of the insulating shielding layer 13 uniform, thereby preventing the electric field from being concentrated in the middle position and causing the structure of the insulating shielding layer 13 to be destroyed;

[0047] The insulating shielding layer 13 can further shield the electric field and isolate the insulating shielding layer 13 from the filler 9 to prevent the electric field from concentrating and attacking the filler 9 .

[0048] The outer circumference of the two conductor posts 10 is wrapped with an outer connector 11, which is made of cross-woven metal wires. The outer side of the outer connector 11 is connected to the inner side of the inner shielding layer 12, and the two conductor posts 10 are electrically connected through the outer connector 11;

[0049] The externally-enclosed connector 11 can carry current and electrically connect the two conductor posts 10 .

[0050] The outer cylinder assembly is filled with a filler 9, and the material of the filler 9 is epoxy resin;

[0051] The epoxy resin is impregnated under vacuum, and after the impregnation is complete, the temperature is adjusted for high-temperature curing to form a solid insulation structure with excellent performance.

[0052] The epoxy resin wraps the insulating shielding layer 13, the connecting section 2 and the portion of the tubular busbar 1 located inside the outer tube assembly;

[0053] The epoxy resin wraps the insulating shielding layer 13, the connecting section 2 and the tubular busbar 1 so as to obtain good insulation.

[0054] The connection between the tubular busbar 1 and the connection section 2 is covered with a stress dispersing cone 3, and the stress dispersing cone 3 is a truncated cone-shaped shell;

[0055] The stress dispersion vertebral body 3 comprises a vertebral body 301, an outer contact surface 302, an inner contact surface 303, a transition surface 1 304, a transition surface 2 305, a transition surface 306, a resistance surface 307 and a transition surface 4 308. The inner middle part of the inner side of the vertebral body 301 is the inner contact surface 303. The inner contact surface 303 is a cylindrical surface. The bottom end of the inner contact surface 303 is connected to the transition surface 1 304. The transition surface 1 304 is connected to the transition surface 2 305. Both the transition surface 1 304 and the transition surface 2 305 are arc surfaces. The radius of the transition surface 1 304 is 2.4 times the radius of the transition surface 2 305.

[0056] The arc where the arc surface of the transition surface 1 304 is located is a quarter of a circle, the arc where the arc surface of the transition surface 2 305 is located is a half of a circle, the outer side of the transition surface 2 305 is connected to the outer contact surface 302, the outer contact surface 302 is an inclined curved surface, the angle between the outer contact surface 302 and the vertical surface is 23 degrees, the outer contact surface 302 is connected to the resistance surface 307 through the transition surface 4 308, and the resistance surface 307 is connected to the top of the inner contact surface 303 through the transition surface 306;

[0057] The vertebral body 301 is made of a polymer composite material with a special dielectric constant, and the polymer composite material with a special dielectric constant is an elastic material with a dielectric constant less than 0.3.

[0058] The stress dispersing cone 3 is located at the joint between the tubular busbar 1 and the connecting section 2, and can disperse the concentrated electrical stress.

[0059] The diameter of the conductor post 10 is 2 / 3 to 3 / 4 of the diameter of the connecting section 2 .

[0060] An elastic ring 4 is provided in the middle of the circumference of the intermediate sleeve 5, and the cross section of the elastic ring 4 is semicircular;

[0061] The elastic ring 1 4 can increase the deformation and expansion amount of the middle sleeve 5, thereby improving the mechanical properties of the middle sleeve 5 and increasing the toughness of the middle sleeve 5.

[0062] The diameter of the end of the side sleeve 7 away from the middle sleeve 5 is smaller than the diameter of the end of the side sleeve 7 close to the middle sleeve 5. An elastic ring 2 8 is arranged on the outer side of the end with the smaller diameter of the side sleeve 7. The cross section of the elastic ring 2 8 is semicircular. The inclination angle of the side sleeve 7 is the same as the inclination angle of the stress dispersion vertebral body 3.

[0063] The middle sleeve 5 can constrain the shape of the side sleeve 7, reduce the deformation of the opening of the side sleeve 7, constrain the stress dispersion vertebral body 3 in the side sleeve 7, and ensure that the stress dispersion vertebral body 3 can play its function.

[0064] The 300 also includes a connection block 309. A plurality of connection blocks 309 are arranged in a circular array on both sides of the inner contact surface 303. The connection block 309 at one end of the vertebral body 301 is plugged into the outer side of the tubular busbar 1, and the connection block 309 at the other end of the vertebral body 301 is plugged into the outer side of the connecting section 2.

[0065] Transition surface 1 304, transition surface 2 305, transition surface 306 and transition surface 4 308 make the transition parts of each surface of the vertebral body 301 smooth, which can disperse stress and avoid stress concentration, thereby preventing the stress generated after the vertebral body 301 is compressed from damaging the structure of the filler 9 and ensuring the sealing performance.

[0066] Polymer composites have excellent chemical and thermal stability and can maintain stable performance under harsh environmental conditions.

[0067] The polymer composite material includes a polyurethane elastomer introduced with nano-SiC filler and carbon nano-powder filler, which can adapt to the high temperature, high power, high frequency and high electromagnetic environment generated at the joint of the tubular busbar 1 and the connecting section 2.

[0068] The specific implementation method is as follows: the tubular busbar 1 and the connecting section 2 are connected, and the outer-wrapped joint 11, the inner shielding layer 12 and the insulating shielding layer 13 are put between the two conductor posts 10. Then, the outer cylinder assembly is put on the outer side of the connecting section 2, the stress dispersion cone 3 and the conductor post 10, and then the two ends of the outer cylinder assembly are sealed and evacuated, and then liquid epoxy resin is injected, and the epoxy resin is impregnated in a vacuum state after the inner part of the outer cylinder assembly is evacuated at both ends. After the impregnation is complete, the temperature is adjusted for high-temperature curing, and the busbar can be used as a busbar to participate in connection and power transmission.

[0069] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An insulating sleeve for a conductor, Features: It comprises a tubular busbar (1), two tubular busbars (1) are connected via a connecting piece, and the connecting piece comprises a connecting section (2), a conductor column (10) and an outer cylinder assembly; Each of the tubular busbars (1) is connected to a connecting section (2), one end of the connecting section (2) away from the tubular busbar (1) is provided with a conductor column (10), two of the conductor columns (10) are butted and in contact, and the outer cylinder assembly is sleeved on the outer circumference of the two connecting sections (2), the two conductor columns (10) and the two tubular busbars (1); The outer cylinder assembly comprises an intermediate sleeve (5) and a side sleeve (7), wherein a side sleeve (7) is provided at each end of the intermediate sleeve (5), the intermediate sleeve (5) is a cylindrical shell, the side sleeve (7) is a truncated cone shell, and a positioning line (6) is provided on the tubular busbar (1).

2. The insulating sleeve for a conductor according to claim 1, Features: An inner shielding layer (12) is connected between the two connecting sections (2), an insulating shielding layer (13) is sleeved on the outer side of the inner shielding layer (12), the inner shielding layer (12) is sleeved on the outer side of the connecting section (2), and the conductor column (10) is located inside the inner shielding layer (12).

3. The insulating sleeve for a conductor according to claim 2, Features: The outer circumferential surface of the two conductor posts (10) is wrapped with an outer connector (11), which is formed by cross-weaving of metal wires. The outer side of the outer connector (11) is connected to the inner side of the inner shielding layer (12).

4. The insulating sleeve for a conductor according to claim 1, Features: The outer cylinder component is filled with a filler (9), and the material of the filler (9) is epoxy resin.

5. The insulating sleeve for a conductor according to claim 2, Features: The epoxy resin wraps the insulating shielding layer (13), the connecting section (2) and the portion of the tubular busbar (1) located inside the outer cylinder assembly.

6. The insulating sleeve for a conductor according to claim 1, Features: The connection between the tubular busbar (1) and the connection section (2) is covered with a stress dispersion cone (3), and the stress dispersion cone (3) is a truncated cone-shaped shell.

7. The insulating sleeve for a conductor according to claim 6, Features: The stress dispersing cone (3) comprises a cone (301), an outer contact surface (302), an inner contact surface (303), a transition surface one (304), a transition surface two (305), a transition surface three (306), a resistance surface (307) and a transition surface four (308); the middle part of the inner side of the cone (301) is the inner contact surface (303); the inner contact surface (303) is a cylindrical surface; the bottom end of the inner contact surface (303) is connected to the transition surface one (304); the transition surface one (304) is connected to the transition surface two (305); the transition surface one (304) and the transition surface two (305) are both arc surfaces; the radius of the transition surface one (304) is 2.4 times the radius of the transition surface two (305); The arc of the arc surface of the transition surface one (304) is a quarter of a circle, the outer side of the transition surface two (305) is connected to the outer contact surface (302), the outer contact surface (302) is an inclined curved surface, the angle between the outer contact surface (302) and the vertical surface is 23 degrees, the outer contact surface (302) is connected to the resistance surface (307) through the transition surface four (308), and the resistance surface (307) is connected to the top of the inner contact surface (303) through the transition surface three (306); The vertebral body (301) is made of a polymer composite material with a special dielectric constant, and the polymer composite material with a special dielectric constant is an elastic material with a dielectric constant less than 0.

3.

8. The insulating sleeve for a conductor according to claim 3, Features: The diameter of the conductor column (10) is 2 / 3 to 3 / 4 of the diameter of the connecting section (2).

9. The insulating sleeve for a conductor according to claim 1, Features: An elastic ring (4) is provided in the middle of the circumference of the intermediate sleeve (5), and the cross section of the elastic ring (4) is semicircular.

10. The insulating sleeve for a conductor according to claim 1, Features: The diameter of the end of the side sleeve (7) away from the middle sleeve (5) is smaller than the diameter of the end of the side sleeve (7) close to the middle sleeve (5); an elastic ring 2 (8) is arranged on the outer side of the end with the smaller diameter of the side sleeve (7); the cross section of the elastic ring 2 (8) is semicircular; the inclination angle of the side sleeve (7) is the same as the inclination angle of the stress dispersion vertebral body (3).

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