Double-break isolation grounding switch and combination switch

Abstract

The utility model discloses a double-break isolation grounding switch and a combination switch, which belong to the technical field of isolation grounding switches, and comprise a shell, and an isolation moving contact seat is arranged in the shell; a double-joint crank arm is arranged in the isolation moving contact seat through a rotating shaft; isolation static contacts are positioned and installed at two adjacent ports of the shell, two isolation conductive seats are installed on the isolation moving contact seat, moving contacts are arranged in the isolation conductive seats in a sliding mode, and the moving contacts are connected with the double-connector crank arm through connecting rods. A connecting conductor is mounted at one port of the shell; and one port of the shell is provided with a grounding moving contact assembling component. The rotating shaft rotates to drive the double-joint crank arm, and the two moving contacts are driven by the two connecting rods to stretch out and draw back in the isolation conductive seat at the same time, thereby realizing connection and disconnection with the isolation static contact. And in disconnection, the grounding moving contact is communicated with the isolation moving contact seat to realize grounding. The whole structure is simple, the right-angle bent double-joint crank arm is adopted, the centers of the two moving contacts are arranged in a coplanar manner, the compactness and flexibility of arrangement of each component are realized, the whole size is reduced, the disassembly and assembly are convenient, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of isolating grounding switches, in particular to a double-break isolating grounding switch and a combined switch. Background Art

[0002] With the increasing industrial and residential electricity consumption, on the one hand, the requirements for grid continuity and reliability are becoming increasingly higher, and on the other hand, new power plants need to be built and expanded to meet the needs of grid operation.

[0003] Due to the lack of foresight in early power station construction, the first phase of combined electrical appliances is generally designed with only one busbar isolation break. When the interval is expanded or repaired, in order to avoid discharge breakdown problems at the isolation break that may cause personal injury and unplanned power outages in the power grid, the original operating busbar needs to be shut down. However, busbar power outages have an adverse impact on the reliability of regional power grid power supply. Double-break disconnectors can solve the technical problem of busbar power outages during interval expansion and maintenance of combined electrical appliances in substations. Before maintenance and expansion, the moving contact assembly of the double-break disconnector after the opening needs to be grounded to prevent the residual charge of the moving contact assembly from causing electric shock during the maintenance process.

[0004] The double-break disconnectors in the prior art are mostly double-break linear layout forms, using gear racks and ball screws as transmission forms, which will cause the two moving contacts to be staggered, the overall structure is relatively complex, and the installation process requirements are high; in addition, the overall size of the linear double-break disconnector is large, which is inconvenient for disassembly and assembly, resulting in increased production costs and a certain impact on the overall insulation performance. Utility Model Content

[0005] In order to solve the problem that most double-break disconnectors in the prior art are in the form of double-break linear arrangement, and adopt the transmission form of gear rack and ball screw, which will cause the two moving contacts to be staggered, the overall structure is relatively complex, and the installation process requirements are high; in addition, the overall size of the linear arrangement double-break disconnector is large, which is inconvenient for disassembly and assembly, resulting in increased production costs, the utility model provides a double-break isolating grounding switch and a combination switch.

[0006] On the one hand, the utility model is realized by the following technical solutions:

[0007] A double-break isolating grounding switch comprises an insulating shell of a cross-four-way structure, in which a conductive shell-shaped isolating moving contact seat is positioned and installed; a double-joint crank arm bent at a right angle is connected and installed in the isolating moving contact seat through a rotating shaft, and the rotating shaft is driven by a power device; isolating static contacts are positioned and installed at two adjacent ports of the shell, two isolating conductive seats corresponding to the two isolating static contacts are connected and installed on the isolating moving contact seat, a moving contact capable of being connected and disconnected with the isolating static contact is slid and electrically connected in the isolating conductive seat, and one end of the moving contact away from the isolating static contact is connected to the end of the double-joint crank arm through a connecting rod; a connecting conductor connected and installed with the isolating moving contact seat is positioned and installed at a port of the shell opposite to an isolating conductive seat; a grounding moving contact assembly component capable of being connected and disconnected with the isolating moving contact seat is positioned and installed at a port of the shell opposite to an isolating static contact.

[0008] A further improvement of the utility model is that the grounding movable contact assembly component and the connecting conductor are arranged at different ports of the housing, and a grounding static contact corresponding to the grounding movable contact assembly component is positioned and installed on the housing.

[0009] A further improvement of the utility model is that the grounding movable contact assembly component and the connecting conductor are arranged at the same port of the housing, and the grounding movable contact assembly component can be connected to or disconnected from the connecting conductor.

[0010] A further improvement of the utility model is that the connecting conductor and the two isolating static contacts are respectively positioned and installed on the housing through insulators.

[0011] A further improvement of the utility model is that the middle part of the shell is a spherical shell structure.

[0012] A further improvement of the utility model is that a guide ring and conductive contact fingers are installed in the isolation conductive seat.

[0013] A further improvement of the utility model is that the rotating shaft is a non-circular shaft and is positioned and inserted with the double-joint crank arm.

[0014] A further improvement of the utility model is that an output shaft is rotatably mounted on the housing, and the output shaft is connected to the rotating shaft through an insulating torsion bar.

[0015] A further improvement of the utility model is that the power device includes a transmission shaft and an operating mechanism capable of driving the transmission shaft to rotate, the transmission shaft is connected to a driving crank arm, the output shaft is connected to an output shaft crank arm, and the driving crank arm and the output shaft crank arm are connected by a connecting rod.

[0016] Another aspect of the utility model is achieved through the following technical solutions:

[0017] A combination switch comprises three double-break isolating grounding switches as described above; three driving crank arms are connected to a transmission shaft.

[0018] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0019] The power device drives the rotating shaft to rotate, so that the double-joint crank arm drives the two moving contacts to expand and contract in the isolated conductive seat through two connecting rods at the same time, so that the two pairs of moving contacts and the isolated static contacts can be connected and disconnected, so as to realize the convenient connection and disconnection of the two electrical circuits; when the two electrical circuits are disconnected, the grounding moving contact in the grounding moving contact assembly is connected with the isolated moving contact seat, so as to achieve grounding. The overall structure is simple, with a right-angle bent double-joint crank arm, and the centers of the two moving contacts are arranged in the same plane (vertically set), which can ensure the coaxiality of the conductor and the shell, improve the insulation performance and movement efficiency, and can realize the convenient connection and disconnection of the two circuits at the same time, and realize the compactness of the arrangement of each component, so that the overall size is reduced, and the flexibility of the equipment layout is improved. It does not require high installation technology, is convenient to disassemble and assemble, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0022] Figure 2 This is a schematic diagram of the connection of a double-joint crank arm, a connecting rod, and a moving contact according to a specific implementation manner of the utility model.

[0023] Figure 3 It is a schematic diagram of the transmission structure of a double-joint crank arm according to a specific implementation mode of the utility model.

[0024] Figure 4 It is a schematic diagram of the structure of a power device according to a specific implementation mode of the utility model.

[0025] Figure 5 It is a schematic top view of a power device according to a specific implementation mode of the utility model.

[0026] Figure 6 It is a schematic diagram of the arrangement of the grounding moving contact assembly components in another embodiment of the specific implementation of the utility model.

[0027] Figure 7 It is a schematic diagram of the shell structure of a specific implementation method of the utility model.

[0028] In the attached drawings: 1. housing; 2. insulator; 3. isolating static contact; 4. isolating moving contact seat; 5. isolating conductive seat; 6. double joint arm; 7. connecting rod; 8. moving contact; 9. connecting pin; 10. first bearing; 11. rotating shaft; 12. insulating torsion bar; 13. output shaft; 14. rotating seal assembly; 15. output shaft arm; 16. connecting rod; 17. second bearing; 18. transmission shaft; 19. bearing seat; 20. operating mechanism; 21. grounding static contact; 22. grounding moving contact assembly; 23. guide ring; 24. conductive contact finger, 25. connecting conductor. DETAILED DESCRIPTION

[0029] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0030] like Figure 1 , 2 As shown in Figures 3, 6 and 7, the utility model discloses a double-break isolating grounding switch, comprising an insulating housing 1 of a cross-four-way structure, wherein a conductive housing-shaped isolating moving contact seat 4 is positioned and installed in the housing 1; a double-joint crank arm 6 bent at a right angle is connected and installed in the isolating moving contact seat 4 through a rotating shaft 11 in the front-to-back direction, and the rotating shaft 11 is driven to rotate by a power device; two adjacent ports (the right port and the lower port) of the housing 1 are respectively positioned and installed with isolating static contacts 3, and two isolating conductive seats 5 (the right side of the isolating moving contact seat 4) corresponding to the two isolating static contacts 3 are connected and installed on the isolating moving contact seat 4. and lower side), a moving contact 8 (conductive) that can be connected and disconnected with the isolating static contact 3 slides in and is electrically connected to the isolating conductive seat 5 (conductive), and the end of the moving contact 8 away from the isolating static contact 3 is connected to the end of the double-joint crank arm 6 through a connecting rod 7, and both ends of the connecting rod 7 are rotatably connected through a connecting pin 9, and a connecting conductor 25 connected and installed with the isolating dynamic contact seat 4 is positioned and installed at the port (left port) of the shell 1 opposite to an isolating conductive seat 5; a grounding moving contact assembly component 22 that can be connected and disconnected with the isolating dynamic contact seat 4 is positioned and installed at the port (left port or upper port) of the shell 1 opposite to an isolating static contact 3.

[0031] The connecting conductor 25 is connected to one end of the electric circuit, and the two isolating static contacts 3 are respectively connected to the other end of the electric circuit; the rotating shaft 11 is driven to rotate by the power device, so that the double-joint crank arm 6 drives the two moving contacts 8 to extend and retract in the isolating conductive seat 5 through the two connecting rods 7 at the same time, so that the two pairs of moving contacts 8 and the isolating static contacts 3 can be connected and disconnected, thereby realizing the convenient connection and disconnection of the two electric circuits; when the two electric circuits are disconnected, the grounding moving contact in the grounding moving contact assembly 22 is connected to the isolating moving contact seat 4, so as to achieve grounding. The overall structure is simple, and a right-angle bent double-joint crank arm 6 is adopted. The centers of the two moving contacts 8 are arranged in the same plane (vertically set), which can ensure the coaxiality of the conductor and the housing 1, improve the insulation performance and movement efficiency, and can realize the convenient connection and disconnection of the two circuits at the same time, and realize the compactness of the arrangement of each component, so that the overall size is reduced, and the flexibility of the equipment arrangement is improved. The requirements for the installation process are not high, and the disassembly and assembly are convenient, which reduces the cost.

[0032] Among them, the front and rear sides of the isolating movable contact seat 4 are provided with through-going circular holes, which can facilitate the disassembly and installation of the connecting pin 9 and the disassembly and assembly of the connecting rod 7.

[0033] In one embodiment, if Figure 2 As shown, the grounding moving contact assembly 22 and the connecting conductor 25 are arranged at different ports of the housing 1, that is, the connecting conductor 25 is arranged at the left port of the housing 1, and the grounding moving contact assembly 22 is arranged at the upper port of the housing 1. The grounding static contact 21 corresponding to the grounding moving contact assembly 22 is positioned and installed on the upper side of the housing 1. A mounting boss is installed on the upper side of the housing 1 for mounting the grounding static contact 21 to improve the integration. Components are arranged at all four ports, the structure is more symmetrical, and the layout is more balanced.

[0034] In another embodiment, if Figure 6 As shown, the grounding moving contact assembly 22 and the connecting conductor 25 are arranged at the same port of the housing 1, that is, both are arranged at the left port of the housing 1, and the grounding moving contact assembly 22 can be connected or disconnected with the connecting conductor 25. The structure is more compact, a cover plate is installed on the upper port of the housing 1, and nitrogen is filled in the housing 1 to ensure the sealing performance inside the housing 1 and the reliability of the disconnector; a shield is installed above the moving contact 8 to ensure a uniform internal electric field.

[0035] Among them, Figure 1 As shown, the connecting conductor 25 and the two isolating static contacts 3 are respectively positioned and installed with the housing 1 through the insulator 2 to ensure the insulation performance with the housing 1.

[0036] Among them, Figure 7 As shown, the middle part of the shell 1 is a spherical shell structure, which effectively expands the inner cavity space, ensures that the internal components have a sufficient insulation distance from the shell 1, and ensures the safety of use.

[0037] Furthermore, the middle part of the isolating movable contact seat 4 is an outwardly convex arc surface structure, and is in line with the movement trajectory of the double joint crank arm 6 and the connecting rod 7. It ensures that the size is small and interference is avoided.

[0038] Further, such as Figure 1 , 3 As shown, a notch is provided on the upper side of the isolating movable contact seat 4, so as to facilitate the disassembly and assembly of the double-joint crank arm 6 and observe the internal transmission connection conditions.

[0039] The cylindrical structure is extended in the left, right and downward directions to install the connecting conductor 25 and the two isolated conductive seats 5.

[0040] like Figure 2 As shown, a guide ring 23 and a conductive contact finger 24 are installed in the isolation conductive seat 5. The guide ring 23 and the conductive contact finger 24 can realize electrical connection and guidance with the moving contact 8.

[0041] The rotating shaft 11 is a non-circular shaft, preferably a hexagonal shaft, and the rotating shaft 11 is positioned and inserted with the double-joint crank arm 6. Both ends of the rotating shaft 11 are rotatably connected and installed with the isolation movable contact seat 4 through the first bearing 10. The reliability of the positioning and insertion of the rotating shaft 11 and the double-joint crank arm 6 is ensured to avoid relative sliding.

[0042] The housing 1 is rotatably mounted with an output shaft 13 via a rotating seal assembly 14, and the output shaft 13 is connected to the rotating shaft 11 via an insulating torsion bar 12. The rotating seal assembly 14 includes an end cover, a sealing ring, and a bearing to ensure the sealing and insulation of the transmission link.

[0043] Among them, Figure 4-5 As shown, the power device includes a transmission shaft 18 and an operating mechanism 20 capable of driving the transmission shaft 18 to rotate. A driving crank arm is connected to the transmission shaft 18, and an output shaft crank arm 15 is connected to the output shaft 13. The driving crank arm and the output shaft crank arm 15 are connected by a connecting rod 16. The output shaft 13 (insulating torsion bar 12, rotating shaft 11, double joint crank arm 6) is driven to rotate by the crank arm connecting rod structure, which has a simple structure and is easy to adjust.

[0044] like Figure 4-5 As shown, the utility model also discloses a combination switch, including three double-break isolating grounding switches; three driving arms are connected to a transmission shaft 18, three housings 1 are equipped with bearing seats 19, and a second bearing 17 supporting the transmission shaft 18 is installed in the bearing seat 19. The three-phase mechanical linkage operation is adopted to achieve synchronous driving of the three isolating switches through a transmission shaft 18, and the overall structure is simple and compact.

[0045] The double-break isolating grounding switch and combination switch drive the rotating shaft 11 to rotate through the power device, so that the double-joint crank arm 6 drives the two moving contacts 8 to extend and retract in the isolating conductive seat 5 through the two connecting rods 7 at the same time, so that the two pairs of moving contacts 8 and the isolating static contact 3 can be connected and disconnected, thereby realizing the convenient connection and disconnection of the two electrical circuits; when the two electrical circuits are disconnected, the grounding moving contact in the grounding moving contact assembly 22 is connected with the isolating moving contact seat 4, so as to realize grounding. The overall structure is simple, and the double-joint crank arm 6 with a right-angle bend is adopted. The centers of the two moving contacts 8 are arranged in the same plane (vertically set), which can ensure the coaxiality of the conductor and the housing 1, improve the insulation performance and movement efficiency, and can realize the convenient connection and disconnection of the two circuits at the same time, and realize the compactness of the arrangement of each component, so that the overall size is reduced, and the flexibility of the equipment arrangement is improved. It has low requirements for the installation process, is convenient for disassembly and assembly, and reduces costs.

[0046] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0047] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-break isolating grounding switch, characterized in that: The invention comprises an insulating housing (1) of a cross-shaped four-way structure, wherein a conductive housing-shaped isolating movable contact seat (4) is positioned and installed in the housing (1); a right-angle-bent double-joint crank arm (6) is connected and installed in the isolating movable contact seat (4) via a rotating shaft (11), and the rotating shaft (11) is driven by a power device; isolating stationary contacts (3) are respectively positioned and installed at two adjacent ports of the housing (1), and two isolating conductive seats (5) corresponding to the two isolating stationary contacts (3) are connected and installed on the isolating movable contact seat (4), and the isolating conductive seat (5) A movable contact (8) capable of being connected and disconnected with the isolating static contact (3) is slidably disposed inside and electrically connected thereto; one end of the movable contact (8) away from the isolating static contact (3) is connected to the end of the double-joint crank arm (6) via a connecting rod (7); a connecting conductor (25) connected and installed with the isolating movable contact seat (4) is positioned and installed at a port of the housing (1) opposite to an isolating conductive seat (5); and a grounding movable contact assembly component (22) capable of being connected and disconnected with the isolating movable contact seat (4) is positioned and installed at a port of the housing (1) opposite to an isolating static contact (3).

2. The double-break isolating and grounding switch according to claim 1, characterized in that: The grounding movable contact assembly component (22) and the connecting conductor (25) are arranged at different ports of the housing (1), and a grounding stationary contact (21) corresponding to the grounding movable contact assembly component (22) is positioned and mounted on the housing (1).

3. The double-break isolating and grounding switch according to claim 1, characterized in that: The grounding movable contact assembly component (22) and the connecting conductor (25) are arranged at the same port of the housing (1), and the grounding movable contact assembly component (22) can be connected to or disconnected from the connecting conductor (25).

4. The double-break isolating and grounding switch according to claim 1, characterized in that: The connecting conductor (25) and the two isolating static contacts (3) are respectively positioned and installed on the housing (1) via the insulator (2).

5. The double-break isolating and grounding switch according to claim 1, characterized in that: The middle part of the shell (1) is a spherical shell structure.

6. The double-break isolating and grounding switch according to claim 1, characterized in that: A guide ring (23) and a conductive contact finger (24) are installed in the isolation conductive seat (5).

7. The double-break isolating and grounding switch according to claim 1, characterized in that: The rotating shaft (11) is a non-circular shaft and is positioned and inserted with the double-joint crank arm (6).

8. The double-break isolating and grounding switch according to claim 1, characterized in that: An output shaft (13) is rotatably mounted on the housing (1), and the output shaft (13) is connected to the rotating shaft (11) via an insulating torsion bar (12).

9. The double-break isolating and grounding switch according to claim 8, characterized in that: The power device comprises a transmission shaft (18) and an operating mechanism (20) capable of driving the transmission shaft (18) to rotate; a driving crank arm is connected to and mounted on the transmission shaft (18); an output shaft crank arm (15) is connected to and mounted on the output shaft (13); and the driving crank arm and the output shaft crank arm (15) are connected via a connecting rod (16).

10. A combination switch, characterized in that: It comprises three double-break isolating and grounding switches as claimed in claim 9; the three driving crank arms are connected to a transmission shaft (18).

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