Integrated insulator structure of vacuum circuit breaker of electric locomotive

Abstract

The invention discloses an integrated insulator structure of a vacuum circuit breaker of an electric locomotive, which relates to the technical field of vacuum circuit breakers, and comprises an insulator body, one end of a tube cavity of the insulator body is a vacuum arc extinguish chamber mounting cavity, and the other end of the tube cavity is an insulating pull rod mounting cavity; the periphery of the insulator body protrudes in the radial direction to form a connecting end pipe. The bottom end of the insulator body is provided with a sealing assembly. The vacuum arc-extinguishing chamber is mounted in the vacuum arc-extinguishing chamber mounting cavity, and a static end conductive structure of the vacuum arc-extinguishing chamber penetrates through and blocks a pipe orifice at the top end of the insulator body; the insulating pull rod is arranged in the insulating pull rod mounting cavity, and one end of the insulating pull rod is connected with a movable conducting rod of the vacuum arc-extinguishing chamber; and one end of the conductive connecting rod hermetically penetrates through the connecting end tube, penetrates into the tube cavity of the insulator body, and is electrically connected with the outer end of the movable conductive rod through a flexible connecting structure. The vacuum arc-extinguishing chamber and the insulating pull rod are sealed in the insulator, so that the sealing and insulating properties are effectively enhanced, the service life is prolonged, and a solid guarantee is provided for stable operation of an electric locomotive.

Description

Technical Field

[0001] This invention relates to the field of vacuum circuit breaker technology, and in particular to an integrated insulator structure for a vacuum circuit breaker in an electric locomotive. Background Technology

[0002] Vacuum circuit breakers, serving as the main switches for the high-voltage systems of electric locomotives, are currently mostly installed on the roof. A vacuum circuit breaker mainly consists of a vacuum interrupter, insulating rods, and an operating mechanism. With the continuous advancement of electrified railway technology and the increasing complexity of external environmental factors, more stringent standards have been imposed on the insulation performance of vacuum circuit breakers. Currently, the industry widely adopts various material solutions for insulation materials, including ceramic insulators, composite insulators formed by combining fiberglass bushings and silicone rubber, and composite insulators made of epoxy resin bushings and silicone rubber. Furthermore, vacuum circuit breakers widely used in electric locomotives generally employ a split design with flange connections for the upper and lower insulators. However, this design may gradually reveal problems with sealing and insulation performance degradation during long-term service. Simultaneously, the complex structural characteristics of split insulators also lead to low efficiency during assembly.

[0003] Considering the above shortcomings, how to provide an integrated insulator structure for electric locomotive vacuum circuit breakers that can effectively seal the vacuum interrupter and insulating tie rod inside, thereby effectively enhancing sealing and insulation performance, improving the service life of the vacuum circuit breaker, and providing a solid guarantee for the long-term stable operation of electric locomotives, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention proposes an integrated insulator structure for electric locomotive vacuum circuit breakers, aiming to solve the technical problems of easy degradation of sealing and insulation performance, short service life, complex structure and low assembly efficiency of the above-mentioned traditional split insulator structures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides an integrated insulator structure for a vacuum circuit breaker in an electric locomotive, comprising:

[0007] The insulator body is sleeve-shaped; one end of the insulator body cavity is a vacuum interrupter installation cavity, and the other end of the insulator body cavity is an insulating tie rod installation cavity; the outer peripheral wall of the insulator body protrudes radially between the vacuum interrupter installation cavity and the insulating tie rod installation cavity to form a connecting end tube; the bottom end of the insulator body is provided with a sealing component for sealing its bottom end tube opening;

[0008] A vacuum interrupter is coaxially installed in the vacuum interrupter mounting cavity; the stationary conductive structure of the vacuum interrupter penetrates and is fixedly sealed at the top end of the insulator body.

[0009] An insulating pull rod is coaxially disposed in the insulating pull rod mounting cavity; one end of the insulating pull rod is connected to the outer end of the moving conductive rod of the vacuum interrupter.

[0010] A conductive connecting rod, one end of which is sealed and passes through the connecting end tube and into the cavity of the insulator body; one end of the conductive connecting rod is electrically connected to the outer end of the moving conductive rod through a flexible connecting structure.

[0011] This invention discloses an integrated insulator structure for a vacuum circuit breaker in an electric locomotive. By effectively sealing the vacuum interrupter and insulating rod within the cavity of the insulator body, the moving end of the vacuum interrupter, i.e., the outer end of the moving conductive rod, is electrically connected to one end of a conductive connecting rod via a flexible connection structure. This accommodates the extension and retraction of the moving conductive rod, thus achieving a flexible electrical connection between the conductive connecting rod and the outer end of the moving conductive rod. Furthermore, the conductive connecting rod passes through the sealed connecting end tube, and the bottom end of the insulator body is sealed by a sealing assembly, ensuring cleanliness during operation on the roof of the electric locomotive and improving reliability in complex environments. The integrated structure design of this invention features high integration and simple assembly, effectively improving the overall assembly efficiency of the vacuum circuit breaker. Moreover, the integrated insulator structure offers superior sealing and insulation performance, extending the product's service life.

[0012] As a further improvement to the above technical solution, the insulator body is made of epoxy resin and is covered with an insulating shed structure.

[0013] As a further improvement to the above technical solution, the insulating skirt structure includes insulating skirt one, insulating skirt two, and insulating skirt three; insulating skirt one and insulating skirt two cover the outer peripheral wall of the insulator body and correspond one-to-one with the vacuum interrupter installation cavity and the insulating tie rod installation cavity; insulating skirt three covers the outer periphery of the connecting end tube.

[0014] As a further improvement to the above technical solution, the sealing assembly includes a base plate and a sealing ring. The base plate covers the bottom end of the insulator body; the sealing ring is placed between the base plate and the bottom end of the insulator body; the other end of the insulating rod movably passes through the base plate and forms a connection end for connecting with the drive end of an external operating mechanism.

[0015] The beneficial effects of the above technical solution are: by sealing the bottom end of the insulator body with the base plate and sealing ring, the cleanliness of the circuit breaker during operation on the roof of the electric locomotive can be effectively guaranteed; in addition, the sealing ring can be made of a flexible and deformable material with a Shore hardness between 40 and 60 degrees, which can have the effect of releasing thermal deformation.

[0016] As a further improvement to the above technical solution, the soft connection structure is a flexible metal wire, one end of which is fixedly connected to one end of the conductive connecting rod, and the other end is fixedly connected to the outer end of the moving conductive rod.

[0017] The beneficial effects of the above technical solution are: the flexible metal wire selected for the soft connection structure can be bent freely and move along with the extension and retraction of the outer end of the moving conductive rod, so that the installation stability of the conductive connection rod will not be affected by the movement of the moving conductive rod.

[0018] As a further improvement to the above technical solution, the outer end face of the moving conductive rod has a threaded hole, and one end of the insulating pull rod has a stud; one end of the flexible connection structure is fixedly connected to one end of the conductive connecting rod, and the other end of the flexible connection structure has a through hole; the stud at one end of the insulating pull rod passes through the through hole at the other end of the flexible connection structure and is adapted to be screwed into the threaded hole of the moving conductive rod, thereby fastening the other end of the flexible connection structure to the outer end of the moving conductive rod.

[0019] The beneficial effect of the above technical solution is that the other end of the flexible connection structure is sleeved on the stud and fastened to the outer end of the moving conductive rod by the insulating pull rod, which improves the reliability of the electrical connection.

[0020] As a further improvement to the above technical solution, the outer peripheral wall of the insulating rod has an insulating skirt, and the outer surface of the insulating skirt is cast with silicone rubber to form a silicone rubber coating layer that can increase the diameter of the skirt.

[0021] The beneficial effects of the above technical solution are: the creepage distance of the insulating tie rod is about 600mm, which is much larger than the 350mm in the TB / T1333.1 standard. The surface of the insulating tie rod is coated with silicone rubber, which increases the diameter of the umbrella skirt, thereby significantly increasing the creepage distance and improving the insulation performance.

[0022] As a further improvement to the above technical solution, the inner peripheral wall of the insulating tie rod mounting cavity is provided with a corrugated protrusion structure for increasing the creepage distance.

[0023] The beneficial effects of the above technical solution are: the inner peripheral wall of the insulating tie rod mounting cavity is designed to be corrugated, which increases its creepage distance, so that the vacuum circuit breaker still meets the insulation requirements under pollution level PD3 (conductive pollution, or dry, non-conductive pollution but may become conductive due to pollution accumulation during its lifespan), which improves the reliability of the product and can ensure the safe operation of electric locomotives in various complex and diverse environments.

[0024] As a further improvement to the above technical solution, the outer peripheral wall of the vacuum interrupter is covered with a rubber layer, and the outer peripheral wall of the vacuum interrupter and the inner peripheral wall of the vacuum interrupter installation cavity are sealed by pouring silicone.

[0025] The beneficial effects of the above technical solution are as follows: The vacuum interrupter encapsulation process proposed in this invention replaces the traditional, complex, and difficult-to-implement glue-pouring method. This invention employs a process of first encapsulating the outer perimeter wall of the vacuum interrupter with glue, and then pouring silicone sealant between the vacuum interrupter and the inner wall of the vacuum interrupter mounting cavity. This achieves a tight bond between the vacuum interrupter and the insulator body, effectively avoiding the problem of insecure fixing of the vacuum interrupter due to insufficient glue filling. This provides excellent protection, extends the service life of the vacuum interrupter, and also improves the reliability of the vacuum circuit breaker operating in complex environments.

[0026] As a further improvement to the above technical solution, the cavity of the insulator body is a connecting cavity between the vacuum interrupter installation cavity and the insulating tie rod installation cavity; the diameter of the connecting cavity is smaller than the diameter of the vacuum interrupter.

[0027] The beneficial effects of the above technical solution are: by designing the diameter of the connecting cavity to be smaller than that of the vacuum interrupter, the vacuum interrupter can be axially bound in the vacuum interrupter installation cavity, thereby improving the tensile stability of the structure.

[0028] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an integrated insulator structure for a vacuum circuit breaker of an electric locomotive, which has the following advantages and beneficial effects:

[0029] The integrated insulator structure of this invention has a high degree of integration, which can replace the traditional split insulator structure. It has better insulation and sealing performance, simple structure and easy overall assembly. The encapsulation process of the vacuum interrupter also replaces the traditional glue-filling method. The traditional glue-filling process is complicated and difficult to implement. The vacuum interrupter encapsulation process proposed in this invention can effectively avoid the problem of the vacuum interrupter not being firmly fixed due to insufficient glue filling, and play a good protective role, improve the service life of the vacuum interrupter, and improve the reliability of the vacuum circuit breaker in complex environments. It effectively seals the vacuum interrupter and the insulating tie rod inside, ensuring that the vacuum circuit breaker can continuously exhibit excellent insulation performance, providing a solid guarantee for the long-term stable operation of electric locomotives. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 An axial sectional view of an integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to the present invention;

[0032] Figure 2 A top view schematic diagram of an integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to the present invention;

[0033] Figure 3 A bottom view schematic diagram of an integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to the present invention;

[0034] Figure 4 A schematic diagram of the external structure of an integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to the present invention;

[0035] In the diagram: 1. Insulator body; 11. Vacuum interrupter installation cavity; 12. Insulating tie rod installation cavity; 13. Connecting end tube; 14. Sealing assembly; 141. Base plate; 142. Sealing ring; 15. Insulating shed structure; 151. Insulating shed one; 152. Insulating shed two; 153. Insulating shed three; 16. Connecting cavity; 17. Sealing cover plate; 18. Wire thread sleeve; 2. Vacuum interrupter; 21. Stationary conductive structure; 22. Moving conductive rod; 3. Insulating tie rod; 4. Conductive connecting rod; 41. Flexible connection structure. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] According to embodiments of the present invention, such as Figures 1 to 4 As shown, an integrated insulator structure for a vacuum circuit breaker in an electric locomotive includes: an insulator body 1, a vacuum interrupter 2, an insulating tie rod 3, and a conductive connecting rod 4.

[0041] The insulator body 1 is in the shape of a sleeve; one end of the cavity of the insulator body 1 is a vacuum interrupter installation cavity 11, and the other end of the cavity of the insulator body 1 is an insulating tie rod installation cavity 12; the outer peripheral wall of the insulator body 1 protrudes radially between the vacuum interrupter installation cavity 11 and the insulating tie rod installation cavity 12 to form a connecting end tube 13; the bottom end of the insulator body 1 is provided with a sealing component 14 for sealing the bottom end of the tube;

[0042] The vacuum interrupter 2 is coaxially installed in the vacuum interrupter mounting cavity 11; the stationary conductive structure 21 of the vacuum interrupter 2 is inserted through and fixedly sealed at the top end of the insulator body 1.

[0043] The insulating rod 3 is coaxially arranged in the insulating rod mounting cavity 12; one end of the insulating rod 3 is connected to the outer end of the moving conductive rod 22 of the vacuum interrupter 2;

[0044] One end of the conductive connecting rod 4 is sealed and passes through the connecting end tube 13 and into the cavity of the insulator body 1; one end of the conductive connecting rod 4 is electrically connected to the outer end of the moving conductive rod 22 through the flexible connecting structure 41.

[0045] This embodiment presents an integrated insulator structure for a vacuum circuit breaker in an electric locomotive. By effectively sealing the vacuum interrupter 2 and the insulating rod 3 within the cavity of the insulator body 1, the moving end of the vacuum interrupter 2, i.e., the outer end of the moving conductive rod 22, is electrically connected to one end of the conductive connecting rod 4 via a flexible connection structure 41. This accommodates the extension and retraction of the moving conductive rod 22, thereby achieving a flexible electrical connection between the conductive connecting rod 4 and the outer end of the moving conductive rod 22. Furthermore, the conductive connecting rod 4 passes through the sealed connection end tube 13, and the bottom end of the insulator body 1 is sealed by a sealing assembly 14, ensuring its cleanliness during operation on the roof of the electric locomotive and improving its reliability in complex environments. The integrated structure design of this invention has a high degree of integration and simple assembly, effectively improving the overall assembly efficiency of the vacuum circuit breaker. Moreover, the integrated insulator structure offers stronger sealing and insulation performance, extending the product's service life.

[0046] In some embodiments, the insulator body 1 is made of epoxy resin and is covered with an insulating skirt structure 15.

[0047] In some embodiments, the insulating skirt structure 15 is a silicone rubber insulating skirt, including insulating skirt one 151, insulating skirt two 152 and insulating skirt three 153; insulating skirt one 151 and insulating skirt two 152 cover the outer peripheral wall of the insulator body 1 and correspond one-to-one with the vacuum interrupter mounting cavity 11 and the insulating tie rod mounting cavity 12; insulating skirt three 153 covers the outer periphery of the connecting end tube 13.

[0048] Specifically, the insulator body 1 and its radially protruding connecting end tube 13 are both made of epoxy resin; the insulating shed structure 15 is cast and cured on the insulator body 1; the production process of casting and curing insulating shed one 151, insulating shed two 152 and insulating shed three 153 on the insulator body 1 is carried out under constant temperature conditions. The parameter characteristics of insulating shed one 151, insulating shed two 152 and insulating shed three 153 and the ambient temperature of use determine the range of the production ambient temperature, and the temperature difference between the two generally does not exceed 30℃.

[0049] In some embodiments, the sealing assembly 14 includes a base plate 141 and a sealing ring 142. The base plate 141 covers the bottom end of the insulator body 1; the sealing ring 142 is placed between the base plate 141 and the bottom end of the insulator body 1; the other end of the insulating rod 3 movably passes through the base plate 141 and forms a connection end for connecting with the drive end of an external operating mechanism.

[0050] By sealing the bottom end of the insulator body 1 with the base plate 141 and the sealing ring 142, the cleanliness of the circuit breaker during operation on the roof of the electric locomotive can be effectively guaranteed. In addition, the sealing ring 142 can be made of a flexible and deformable material with a Shore hardness between 40 and 60 degrees, which can release the effect of thermal deformation.

[0051] Specifically, a sealing groove is coaxially formed at the bottom end of the insulator body 1, and a sealing ring 142 is fitted into the sealing groove. A threaded hole is formed on the bottom wall of the sealing groove, and a wire threaded sleeve 18 is fitted into the threaded hole. The base plate 141 is embedded in the sealing groove and is fastened to the wire threaded sleeve 18 in the threaded hole by screws. The center of the base plate 141 has a through hole, and the other end of the insulating rod 3 is adapted to move through the through hole. The other end face of the insulating rod 3 has a threaded hole. An external operating mechanism can be an electromagnetic mechanism. The drive shaft end of the electromagnetic mechanism is screwed into the threaded hole at the other end of the insulating rod 3 to realize the extension and retraction drive operation of the insulating rod 3.

[0052] In some embodiments, the flexible connection structure 41 is a flexible metal wire, one end of which is fixedly connected to one end of the conductive connecting rod 4, and the other end is fixedly connected to the outer end of the movable conductive rod 22.

[0053] The flexible connection structure 41 is made of a flexible metal wire that can bend freely and move along with the outer end of the moving conductive rod 22, so that the installation stability of the conductive connection rod 4 will not be affected by the movement of the moving conductive rod 22.

[0054] In some embodiments, the outer end face of the movable conductive rod 22 has a threaded hole, and one end of the insulating pull rod 3 has a stud; one end of the flexible connection structure 41 is fixedly connected to one end of the conductive connecting rod 4, and the other end of the flexible connection structure 41 has a through hole; the stud at one end of the insulating pull rod 3 passes through the through hole at the other end of the flexible connection structure 41 and is adapted to be screwed into the threaded hole of the movable conductive rod 22, thereby fastening the other end of the flexible connection structure 41 to the outer end of the movable conductive rod 22.

[0055] The other end of the flexible connection structure 41 is fitted onto the stud and fastened to the outer end of the moving conductive rod 22 by the insulating pull rod 3, which improves the reliability of the electrical connection.

[0056] In some embodiments, the outer peripheral wall of the insulating rod 3 has an insulating skirt, and the outer surface of the insulating skirt is cast with silicone rubber to form a silicone rubber coating layer that can increase the diameter of the skirt.

[0057] The creepage distance of the insulating tie rod 3 is approximately 600mm, which is much greater than the 350mm in the TB / T1333.1 standard. The surface of the insulating tie rod 3 is coated with silicone rubber, which increases the diameter of the umbrella skirt, thereby further significantly increasing the creepage distance and improving the insulation performance.

[0058] In some embodiments, the inner peripheral wall of the insulating tie rod mounting cavity 12 is provided with a corrugated protrusion structure for increasing the creepage distance.

[0059] The inner circumferential wall of the insulating tie rod mounting cavity 12 is designed to be corrugated, which increases its creepage distance. This allows the vacuum circuit breaker to still meet insulation requirements even under pollution level PD3 conductive pollution or dry, non-conductive pollution that may become conductive due to pollution accumulation during its lifespan. This improves the reliability of the product and ensures the safe operation of electric locomotives in various complex and diverse environments.

[0060] In some embodiments, the outer peripheral wall of the vacuum interrupter 2 is covered with a rubber layer, and the outer peripheral wall of the vacuum interrupter 2 and the inner peripheral wall of the vacuum interrupter mounting cavity 11 are sealed by casting silicone.

[0061] The vacuum interrupter encapsulation process proposed in this invention replaces the traditional, complex, and difficult-to-implement glue-pouring method. This invention employs a process of first encapsulating the outer periphery of the vacuum interrupter 2 with glue, and then pouring silicone sealant between the vacuum interrupter 2 and the inner wall of the vacuum interrupter mounting cavity 11. This achieves a tight bond between the vacuum interrupter 2 and the insulator body 1, effectively avoiding the problem of insecure fixing of the vacuum interrupter due to insufficient glue filling. This provides excellent protection, extends the service life of the vacuum interrupter, and also improves the reliability of the vacuum circuit breaker operating in complex environments.

[0062] Specifically, the top of the vacuum interrupter 2 is fixed to the insulator body 1 via the stationary conductive structure 21. The outer surface of the vacuum interrupter 2 is first wrapped with rubber. Before casting, the surface of the vacuum interrupter needs to be polished and then coated with liquid sealant before casting. The purpose of this is to ensure that it fits tightly with the insulator body 1 of the indoor epoxy resin bushing structure.

[0063] In some embodiments, a connecting cavity 16 is formed between the vacuum interrupter mounting cavity 11 and the insulating tie rod mounting cavity 12 corresponding to the cavity of the insulator body 1; the diameter of the connecting cavity 16 is smaller than the diameter of the vacuum interrupter 2. The vacuum interrupter mounting cavity 11, the insulating tie rod mounting cavity 12, and the connecting cavity 16 are arranged coaxially, and the diameters of the vacuum interrupter mounting cavity 11 and the insulating tie rod mounting cavity 12 are both larger than the diameter of the connecting cavity 16.

[0064] By designing the diameter of the connecting cavity 16 to be smaller than that of the vacuum interrupter 2, the vacuum interrupter 2 can be axially bound in the vacuum interrupter mounting cavity 11, thereby improving the tensile stability of the structure.

[0065] Specifically, the connecting end tube 13 serves as the outlet end of the insulator body 1, and its function is to seal and fix the conductive connecting rod 4. The cavity of the connecting end tube 13 is connected to the connecting cavity 16. The outer port of the connecting end tube 13 has a sealing groove. One end of the conductive connecting rod 4 passes through the sealing groove and is fitted into the cavity of the connecting end tube 13. An annular sealing gasket is embedded in the sealing groove and fits snugly on the conductive connecting rod 4. A sealing cover plate 17 is provided on the side of the annular sealing gasket away from the bottom of the sealing groove. The sealing cover plate 17 is fastened to the bottom wall of the sealing groove along the axial direction of the connecting end tube 13 by screws, thereby pressing the annular sealing gasket against the bottom wall of the sealing groove, achieving a good seal between the connecting end tube 13 and the conductive connecting rod 4. One end of the flexible connection structure 41 passes through the cavity of the connecting end tube 13 and is fixedly connected to one end of the conductive connecting rod 4.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated insulator structure for a vacuum circuit breaker in an electric locomotive, characterized in that, include: An insulator body (1) is sleeve-shaped; one end of the cavity of the insulator body (1) is a vacuum interrupter installation cavity (11), and the other end of the cavity of the insulator body (1) is an insulating tie rod installation cavity (12); the outer peripheral wall of the insulator body (1) protrudes radially between the vacuum interrupter installation cavity (11) and the insulating tie rod installation cavity (12) to form a connecting end tube (13); the bottom end of the insulator body (1) is provided with a sealing component (14) for sealing its bottom end tube opening; Vacuum interrupter (2), which is adapted to be coaxially installed in the vacuum interrupter mounting cavity (11); the stationary conductive structure (21) of the vacuum interrupter (2) penetrates and is fixedly sealed at the top end of the insulator body (1); An insulating pull rod (3) is coaxially disposed in the insulating pull rod mounting cavity (12); one end of the insulating pull rod (3) is connected to the outer end of the moving conductive rod (22) of the vacuum interrupter (2); A conductive connecting rod (4) is provided, with one end of which is sealed through the connecting end tube (13) and inserted into the cavity of the insulator body (1); one end of the conductive connecting rod (4) is electrically connected to the outer end of the moving conductive rod (22) through a flexible connecting structure (41).

2. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The insulator body (1) is made of epoxy resin and is covered with an insulating awning structure (15).

3. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 2, characterized in that, The insulating skirt structure (15) includes insulating skirt one (151), insulating skirt two (152) and insulating skirt three (153); insulating skirt one (151) and insulating skirt two (152) cover the outer peripheral wall of the insulator body (1) and correspond one-to-one with the vacuum interrupter cavity (11) and the insulating rod cavity (12); insulating skirt three (153) covers the outer periphery of the connecting end tube (13).

4. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The sealing assembly (14) includes a base plate (141) and a sealing ring (142). The base plate (141) covers the bottom end of the insulator body (1). The sealing ring (142) is placed between the base plate (141) and the bottom end of the insulator body (1). The other end of the insulating rod (3) extends through the base plate (141) and forms a connection end for connecting with the drive end of an external operating mechanism.

5. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The flexible connection structure (41) is a flexible metal wire, one end of which is fixedly connected to one end of the conductive connecting rod (4), and the other end is fixedly connected to the outer end of the moving conductive rod (22).

6. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The outer end face of the moving conductive rod (22) has a threaded hole, and one end of the insulating pull rod (3) has a stud; one end of the flexible connection structure (41) is fixedly connected to one end of the conductive connecting rod (4), and the other end of the flexible connection structure (41) has a through hole; the stud at one end of the insulating pull rod (3) passes through the through hole at the other end of the flexible connection structure (41) and is adapted to be screwed into the threaded hole of the moving conductive rod (22), thereby fastening the other end of the flexible connection structure (41) to the outer end of the moving conductive rod (22).

7. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The outer peripheral wall of the insulating tie rod (3) has an insulating skirt, and the outer surface of the insulating skirt is cast with silicone rubber to form a silicone rubber coating layer that can increase the diameter of the skirt.

8. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The inner peripheral wall of the insulating tie rod mounting cavity (12) is provided with a corrugated protrusion structure for increasing the creepage distance.

9. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The outer peripheral wall of the vacuum interrupter (2) is covered with a rubber layer, and the outer peripheral wall of the vacuum interrupter (2) and the inner peripheral wall of the vacuum interrupter installation cavity (11) are sealed by pouring silicone.

10. The integrated insulator structure for a vacuum circuit breaker in an electric locomotive according to claim 1, characterized in that, The cavity of the insulator body (1) is connected to the vacuum interrupter installation cavity (11) and the insulating tie rod installation cavity (12) by a connecting cavity (16); the diameter of the connecting cavity (16) is smaller than the diameter of the vacuum interrupter (2).

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