Moving contact contact seat assembly for double-break isolating switch

Abstract

The utility model discloses a moving contact contact seat assembly for a double-break disconnecting switch, which comprises a shell and a moving contact contact seat assembly arranged in the shell in a matching manner, the moving contact contact seat assembly comprises a first mounting cavity, the axis of the first mounting cavity is vertical to that of a second mounting cavity, and the first mounting cavity and the second mounting cavity are arranged side by side along the radial direction to form a communication structure; the axis of the third installation cavity is perpendicular to the axes of the first installation cavity and the second installation cavity in different planes, the third installation cavity, the first installation cavity and the second installation cavity form a through structure, the first moving contact is installed in the first installation cavity, and the second moving contact is installed in the second installation cavity. The third mounting cavity is provided with a transmission shaft for driving the first moving contact and the second moving contact, so that the double fractures of the double-fracture isolating switch are arranged in an angular shape; according to the design of the moving contact seat, the length of the double-break isolating switch is greatly reduced, and the requirement of compact arrangement of GIS intervals can be met.

Description

Technical Field

[0001] The utility model relates to a movable contact seat assembly for a double-break disconnector, and relates to the equipment field of converter stations / substations with voltage levels of 220kV and above. Background Art

[0002] With the rapid development of the power industry, gas-insulated metal-enclosed switchgear (GIS) has been widely adopted due to its small footprint, compact structure, high reliability, and low maintenance workload. With the continuous increase in power load and the demand for grid optimization, GIS expansion projects are gradually increasing. However, traditional GIS disconnectors have only a single disconnecting break. During expansion construction and field testing, the operating busbar must be repeatedly shut down, even with both busbars shut down simultaneously. This leads to significant power outage coordination difficulties and economic losses, significantly reducing the reliability of the grid structure and becoming a persistent problem that restricts GIS expansion construction, field testing, and emergency repairs.

[0003] To address these issues, it's crucial to replace traditional GIS standby busbar disconnectors with double-break disconnectors, enabling substation expansion without power outages. For example, a Chinese invention patent, with authorization publication number CN116168963A and an authorization publication date of May 26, 2023, discloses a movable contact seat assembly and a double-break disconnector. The movable contact seat has a third mounting cavity, with two movable contacts mounted in the first and second mounting cavities, respectively. A drive shaft is located in the third mounting cavity, simultaneously driving the two movable contacts to achieve simultaneous opening and closing.

[0004] Although such a double-break disconnector can realize non-stop maintenance and expansion of GIS, its special long third installation cavity design makes the double-break disconnector very long and cannot meet the requirements of compact arrangement when used. Utility Model Content

[0005] The utility model provides a movable contact seat assembly for a double-break disconnector, which is used to overcome the defect in the prior art that the double-break disconnector is designed with a long third installation cavity, which causes the switch to be unable to meet the requirements of compact spacing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The utility model discloses a moving contact base assembly for a double-break disconnector, comprising a shell and a moving contact base assembly cooperatively arranged in the shell, wherein the moving contact base assembly comprises a first mounting cavity, wherein the axes of the first mounting cavity and the second mounting cavity are perpendicular and radially arranged side by side to form a connecting structure, wherein the axis of the third mounting cavity is perpendicular to the axes of the first mounting cavity and the second mounting cavity in different planes, and forms a through structure with the first mounting cavity and the second mounting cavity, wherein the first moving contact is mounted in the first mounting cavity, and the second moving contact is mounted in the second mounting cavity, and the third mounting cavity is provided with a transmission shaft for driving the first moving contact and the second moving contact, so that the double breaks of the double-break disconnector are arranged in an angular shape.

[0008] Furthermore, the first installation cavity, the second installation cavity and the third installation cavity are all cylindrical cavities with circular cross-sections.

[0009] Furthermore, a first moving contact is installed in the first mounting cavity, and a second moving contact is installed in the second mounting cavity. Both the first moving contact and the second moving contact are cylindrical. The first moving contact is connected to the first rack through a first rack fixing block. A second rack extending along its axial direction is provided on the inner wall of the second moving contact. A transmission structure is provided in the third mounting cavity 5. The transmission structure is respectively provided with a first gear and a second gear at positions corresponding to the first rack and the second rack; the first gear is engaged with the first rack, and the second gear is engaged with the second rack; a first rack limit block is also provided to prevent the first gear from disengaging from the first rack.

[0010] Furthermore, the first rack and the second rack are driven by the transmission shaft, the first gear and the second gear to enable the first moving contact and the second moving contact to be synchronously closed and opened, thereby realizing the function of the double-break disconnector to simultaneously control the opening and closing of two breaks through one transmission mechanism.

[0011] Furthermore, the transmission shafts between the phases are connected through inter-phase transmission rods.

[0012] Furthermore, the movable contact seat assembly is connected to the housing through a support insulator.

[0013] Furthermore, the auxiliary earthing switch movable contact is cylindrical, installed in the auxiliary earthing switch movable contact seat and fixed on the housing.

[0014] The beneficial effects achieved by the present invention are as follows: the axes of the first mounting cavity and the second mounting cavity are perpendicular and arranged side by side in the radial direction; the axis of the third mounting cavity is perpendicular to the axes of the first mounting cavity and the second mounting cavity in different planes; the first moving contact is installed in the first mounting cavity; the second moving contact is installed in the second mounting cavity; the third mounting cavity is provided with a transmission shaft for driving the first moving contact and the second moving contact, so that the double breaks of the double-break disconnector are arranged in an angular shape, and a three-phase linkage mechanical gear rack structure is adopted. The six moving contacts of the three-phase disconnector are driven by an operating mechanism to realize the opening and closing operations of the double-break disconnector; the design of the moving contact seat greatly reduces the length of the double-break disconnector, which can meet the requirements of compact arrangement of GIS intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a cross-sectional view of the double-break disconnector of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the contact seat of the utility model;

[0018] Figure 3 This utility model Figure 1 Cross-sectional view along the AA axis.

[0019] In the figure: 1. Housing; 2. Moving contact seat assembly; 3. First mounting cavity; 4. Second mounting cavity; 5. Third mounting cavity; 6. First moving contact; 7. Second moving contact; 8. Drive shaft; 9. Double-break disconnector operating mechanism; 10. First gear; 11. Second gear; 12. First rack; 13. Second rack; 14. First rack limit block; 15. First rack fixing block; 16. First static contact seat; 17. Second static contact seat; 18. Post insulator; 19. Interphase transmission rod; 20. Auxiliary earthing switch moving contact seat; 21. Auxiliary earthing switch moving contact; 22. Auxiliary earthing switch mechanism. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0021] Example 1

[0022] like Figure 1 As shown, a movable contact seat assembly for a double-break disconnector includes a housing 1 and a movable contact seat assembly 2 cooperatively arranged in the housing 2.

[0023] like Figure 2 As shown, the moving contact seat assembly 2 includes a first mounting cavity 3, the axes of the first mounting cavity 3 and the second mounting cavity 4 are perpendicular and arranged side by side in the radial direction to form a connecting structure, the axis of the third mounting cavity 5 is perpendicular to the axes of the first mounting cavity 3 and the second mounting cavity 4 in different planes, and forms a through structure with the first mounting cavity 3 and the second mounting cavity 4, and each mounting cavity is a cylindrical cavity with a circular cross-section.

[0024] like Figure 3 As shown, the first moving contact 6 is installed in the first mounting cavity 3, and the second moving contact 7 is installed in the second mounting cavity 4. The first moving contact 6 and the second moving contact 7 are both cylindrical. The first moving contact 6 is connected to the first rack 12 through the first rack fixing block 15. The inner wall of the second moving contact 7 is provided with a second rack 11 extending along its axial direction. The driving structure is a transmission structure arranged in the third mounting cavity 5, and the transmission structure is respectively provided with a first gear 10 and a second gear 11 at positions corresponding to the first rack 12 and the second rack 13; the first gear 10 is meshed and connected to the first rack 12, and the second gear 11 is meshed and connected to the second rack 13; in order to ensure the effectiveness of the first gear 10 transmitting the first rack 12, a first rack limit block 14 is also provided to prevent the first gear 10 from disengaging from the first rack 12.

[0025] In this embodiment, the driving structure of the moving contact seat assembly 2 can effectively drive the first rack 12 and the second rack 13 through the transmission shaft 8, the first gear 10 and the second gear 11 to achieve synchronous closing and opening of the first moving contact 6 and the second moving contact 7, thereby realizing the function of the double-break disconnector to simultaneously control the opening and closing of two breaks through one transmission mechanism.

[0026] In this embodiment, the transmission shafts 8 between the phases are connected in transmission via an inter-phase transmission rod 19 .

[0027] In this embodiment, the moving contact seat assembly 2 is connected to the housing 1 through the post insulator 18 .

[0028] In this embodiment, the auxiliary earthing switch movable contact 21 is cylindrical, installed in the auxiliary earthing switch movable contact seat 20 , and fixed on the housing 1 .

[0029] The moving contact seat assembly 2 is made of ZAlSi7MgA-T6 material.

[0030] The first moving contact 6 , the second moving contact 7 , the first static contact seat 16 , the second static contact seat 17 , the auxiliary earthing switch moving contact seat 20 and the auxiliary earthing switch moving contact 21 are all made of 6063-T6 material.

[0031] The transmission shaft 8, the first gear 10 and the second gear 11 are all made of 20CrMo.

[0032] The first rack 12 and the second rack 13 are both made of 35CrMO.

[0033] The first rack fixing block 15 is made of Q235 material.

[0034] The support insulator 18 and the interphase transmission rod 19 are both made of epoxy resin.

[0035] It should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, and the like that fall within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention. The terms used in the description of this application are intended only to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to scale. Technologies, methods, and devices known to persons skilled in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0037] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

Claims

1. A movable contact seat assembly for a double-break disconnector, characterized in that: It includes a housing and a movable contact seat assembly arranged in the housing; The movable contact seat assembly includes a first mounting cavity, the axes of the first mounting cavity and the second mounting cavity are perpendicular and arranged side by side in the radial direction to form a connecting structure, and the axis of the third mounting cavity is perpendicular to the axes of the first mounting cavity and the second mounting cavity in a non-planar manner to form a through structure with the first mounting cavity and the second mounting cavity; The first moving contact is installed in the first installation cavity, the second moving contact is installed in the second installation cavity, and the third installation cavity is provided with a transmission shaft for driving the first moving contact and the second moving contact, so that the double breaks of the double-break disconnector are arranged in an angular shape.

2. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: The first installation cavity, the second installation cavity and the third installation cavity are all cylindrical cavities with circular cross-sections.

3. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: A first moving contact is installed in the first mounting cavity, and a second moving contact is installed in the second mounting cavity. Both the first moving contact and the second moving contact are cylindrical. The first moving contact is connected to the first rack through a first rack fixing block. A second rack extending along its axial direction is provided on the inner wall of the second moving contact. A transmission structure is provided in the third mounting cavity. The transmission structure is respectively provided with a first gear and a second gear at positions corresponding to the first rack and the second rack; the first gear is engaged with the first rack, and the second gear is engaged with the second rack; a first rack limit block is also provided to prevent the first gear from disengaging from the first rack.

4. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: The first rack and the second rack are driven by the transmission shaft, the first gear and the second gear to enable the first moving contact and the second moving contact to be synchronously closed and opened, thereby realizing the function of the double-break disconnector to simultaneously control the opening and closing of two breaks through one transmission mechanism.

5. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: The transmission shafts between the phases are connected through inter-phase transmission rods.

6. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: The moving contact seat assembly is connected to the housing through a support insulator.

7. The movable contact seat assembly for a double-break disconnector according to claim 1, characterized in that: The auxiliary earthing switch movable contact is cylindrical, installed in the auxiliary earthing switch movable contact seat and fixed on the housing.

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