High-voltage isolating switch contact

Abstract

The utility model relates to the technical field of high-voltage alternating-current disconnecting switches, in particular to a high-voltage disconnecting switch contact, which comprises a first base and a second base, a connecting block is arranged at the top end of the first base, a connecting shaft is arranged on the connecting block, two sides of the connecting shaft are movably connected with disconnecting link pieces, and the two disconnecting link pieces are provided with the same bolt. A bolt penetrates through the two disconnecting link pieces, one end of the bolt is connected with a compression nut through threads, a spring is installed between the compression nut and one disconnecting link piece, connecting contacts are fixedly arranged on the sides, close to each other, of the two disconnecting link pieces, and a check block fixedly connected with the disconnecting link piece is arranged at the bottom of each connecting contact. Chamfers are arranged at the top and the bottom of each check block, a connecting plate is arranged on the second base, through grooves matched with the check blocks are formed in the connecting plate, the thickness of the check blocks is larger than that of the connecting contacts, and the thickness of the two connecting contacts and the thickness of the connecting plate are larger than that of the two check blocks.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage AC isolating switches, in particular to a high-voltage isolating switch contact. Background Art

[0002] As we all know, an isolating switch is a switching device that has an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts when in the open position; and can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time when in the closed position.

[0003] Disconnectors generally refer to high-voltage disconnectors, i.e. disconnectors with rated voltages of 1kV and above, usually referred to as disconnectors. They are the most commonly used type of high-voltage switchgear. Their working principle and structure are relatively simple, but due to their large usage and high requirements for working reliability, they have a great impact on the design, establishment and safe operation of substations and power plants. The main feature of disconnectors is that they have no arc extinguishing capability and can only open and close circuits without load current. Disconnectors are used at all levels of voltage to change circuit connections or isolate lines or equipment from power supplies. They have no current-breaking capability and can only be operated after disconnecting the line with other equipment. They are generally equipped with an interlocking device to prevent misoperation of the switch when it is under load, and sometimes a pin is required to prevent the switch from being disconnected under the magnetic force of a large fault.

[0004] The connection ends of the existing disconnectors need to be tightly attached together, so the contacts and connection plates on the high-voltage disconnectors rub against each other during the opening and closing process. Frequent opening and closing of the disconnectors will cause wear on the connection contacts, reducing the service life of the connection contacts. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-voltage disconnect switch contact, which can effectively prevent the wear of the connecting contact during the process of opening and closing the disconnect switch, thereby increasing the service life of the connecting contact.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-voltage isolating switch contact, comprising a first base and a second base, a connecting block is arranged at the top of the first base, a connecting shaft is arranged on the connecting block, knife gate pieces are movably connected on both sides of the connecting shaft, the same bolt is installed on the two knife gate pieces, the bolt passes through the two knife gate pieces, one end of the bolt is connected with a clamping nut through a thread, a spring is installed between the clamping nut and one of the knife gate pieces, a connecting contact is fixedly arranged on one side of the two knife gate pieces close to each other, a stopper fixedly connected to the knife gate piece is arranged at the bottom of each connecting contact, and chamfers are arranged on the top and bottom of each stopper, a connecting plate is arranged on the second base, and a through groove matching the stopper is arranged on the connecting plate.

[0009] Furthermore, the thickness of the stopper is greater than the thickness of the connecting contact, and the thickness of the two connecting contacts and the connecting plate is greater than the thickness of the two stoppers.

[0010] Furthermore, chamfers are provided on both sides of the top of the connecting plate.

[0011] Furthermore, both of the two knife gate pieces are provided with through holes for installing bolts.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a high-voltage isolating switch contact having the following

[0014] Beneficial effects:

[0015] The high-voltage isolating switch contact has a stopper and a through groove, wherein the thickness of the stopper is greater than the thickness of the connecting contact, and the thickness of the two connecting contacts and the connecting plate is greater than the thickness of the two stops. During the process of opening and closing the isolating switch, the friction between the stopper and the connecting plate replaces the friction between the connecting contacts and the connecting plate. Frequent opening and closing of the isolating switch will not cause wear to the connecting contacts, thereby increasing the service life of the connecting contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0018] Figure 3 This is a front view structural schematic diagram of the utility model;

[0019] Figure 4 For this utility model Figure 2 A schematic cross-sectional view of AA shown in FIG.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the gate opening of the utility model;

[0021] Figure 6 It is a schematic diagram of the top view of the gate opening of the utility model.

[0022] In the figure: 1. first base; 2. second base; 3. connecting block; 4. connecting shaft; 5. knife plate; 6. bolt; 7. clamping nut; 8. spring; 9. connecting contact; 10. stop block; 11. connecting plate; 12. through groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-6 The utility model discloses a high-voltage isolating switch contact, comprising a first base 1 and a second base 2. A connecting block 3 is arranged at the top of the first base 1, a connecting shaft 4 is arranged on the connecting block 3, knife gate pieces 5 are movably connected on both sides of the connecting shaft 4, the same bolt 6 is installed on the two knife gate pieces 5, the bolt 6 passes through the two knife gate pieces 5, one end of the bolt 6 is connected with a clamping nut 7 by threading, and the clamping force of the spring 8 can be adjusted by rotating the clamping nut 7. A spring 8 is installed between the clamping nut 7 and one of the knife gate pieces 5, so that the connecting contact 9 and the connecting plate 11 can be closely fitted, and a connecting contact 9 is fixedly arranged on one side of the two knife gate pieces 5 close to each other, and a stopper 10 fixedly connected to the knife gate piece 5 is arranged at the bottom of each connecting contact 9, and chamfers are arranged on the top and bottom of each stopper 10, a connecting plate 11 is arranged on the second base 2, and a through groove 12 matching the stopper 10 is arranged on the connecting plate 11.

[0025] The thickness of the stopper 10 is greater than the thickness of the connecting contact 9 , and the thickness of the two connecting contacts 9 and the connecting plate 11 is greater than the thickness of the two stoppers 10 .

[0026] Wherein, both sides of the top of the connecting plate 11 are provided with chamfers.

[0027] Wherein, through holes for installing bolts 6 are provided on the two knife gate pieces 5 .

[0028] To sum up, when this high-voltage disconnect switch contact is in use, during the closing process, the block 10 first contacts the connecting plate 11, and the friction between the block 10 and the connecting plate 11 replaces the friction between the connecting contact 9 and the connecting plate 11. The block 10 moves into the through groove 12, and the connecting contact 9 and the connecting plate 11 contact. During the opening process, the block 10 also replaces the friction between the connecting contact 9 and the connecting plate 11.

[0029] The technical terms or scientific terms used in the description of this application should be the common meanings understood by ordinary technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate relative directions or positional relationships, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance.

[0030] The words "one", "an" or "the" and the like used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The words "include" or "comprise" and the like used in the description of this application mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage disconnect switch contact, comprising a first base (1) and a second base (2), characterized in that: A connecting block (3) is arranged at the top of the first base (1), a connecting shaft (4) is arranged on the connecting block (3), knife gate pieces (5) are movably connected to the two sides of the connecting shaft (4), the two knife gate pieces (5) are installed with the same bolt (6), the bolt (6) passes through the two knife gate pieces (5), one end of the bolt (6) is connected with a clamping nut (7) by threading, a spring (8) is installed between the clamping nut (7) and one of the knife gate pieces (5), a connecting contact (9) is fixedly arranged on the side where the two knife gate pieces (5) are close to each other, a stopper (10) fixedly connected to the knife gate piece (5) is arranged at the bottom of each connecting contact (9), and the top and bottom of each stopper (10) are chamfered, and a connecting plate (11) is arranged on the second base (2), and a through groove (12) matching the stopper (10) is arranged on the connecting plate (11).

2. A high-voltage isolating switch contact according to claim 1, characterized in that: The thickness of the stopper (10) is greater than the thickness of the connecting contact (9), and the thickness of the two connecting contacts (9) and the connecting plate (11) is greater than the thickness of the two stoppers (10).

3. A high-voltage isolating switch contact according to claim 1, characterized in that: Both sides of the top of the connecting plate (11) are provided with chamfers.

4. A high-voltage disconnect switch contact according to claim 1, characterized in that: Through holes for installing bolts (6) are provided on the two knife gate pieces (5).

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