Isolating switch

Abstract

The utility model discloses an isolating switch, which comprises a rack, a main shaft rotatably arranged on the rack, a grounding contact fixedly arranged at the front part of the rack, and an isolating contact arranged at the rear part of the rack, the isolating contact is sleeved on the outer side of the main shaft, and three moving contact assemblies are arranged on the outer side of the main shaft at equal intervals. The moving contact assembly comprises two moving contact pieces and two transmission pieces which are arranged on the main shaft in a sleeving mode, the two moving contact pieces are located between the two transmission pieces, the adjacent moving contact pieces are tightly attached to the adjacent transmission pieces, and second bolts are arranged between the two moving contact pieces and the two transmission pieces in a penetrating mode. According to the utility model, the second bolt is used to drive the moving contact to act through the transmission sheet, a plastic housing is not used to drive the moving contact to act, most of the moving contact is exposed, the transmission sheet is made of aluminum alloy, and the heat conduction speed between the transmission sheet and the moving contact is fast, so that the heat dissipation capability of the moving contact is improved, and the service life of the moving contact is prolonged. The temperature of the moving contact is prevented from being too high.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, specifically to a disconnecting switch. Background Technology

[0002] Disconnect switches are an important electrical device in power systems. Their function is to completely isolate equipment from the power source during equipment inspection, maintenance, or fault handling, preventing accidental power supply and providing safety for maintenance personnel.

[0003] In existing disconnect switches, the moving contact is usually installed inside a plastic housing. The main shaft rotates the plastic housing, and the plastic housing causes the moving contact to move. For example, Chinese utility model patent application number 201922466045.9 discloses a disconnect switch in which the moving contact is installed inside a transmission housing. However, due to the obstruction of the plastic housing, the moving contact is difficult to dissipate heat, resulting in excessively high temperature of the moving contact, accelerated surface oxidation, and shortened service life. Utility Model Content

[0004] The purpose of this invention is to provide an isolating switch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a disconnecting switch, comprising a frame, a main shaft rotatably mounted on the frame, a grounding contact fixedly mounted at the front of the frame, and an isolation contact disposed at the rear of the frame. The isolation contact is sleeved on the outside of the main shaft. Three moving contact assemblies are equally spaced on the outside of the main shaft. Each moving contact assembly includes two moving contact pieces and two transmission pieces sleeved on the main shaft. The two moving contact pieces are located between the two transmission pieces. A second bolt passes through the two moving contact pieces and the two transmission pieces. One end of the second bolt is threadedly connected to a second nut. A first bolt is installed between the two moving contact pieces. Two elastic elements are sleeved on the outside of the first bolt. One end of the first bolt is threadedly connected to a first nut. A limiting sleeve is provided in the middle of both the second bolt and the first bolt. A pin hole is opened on the transmission piece. A cylindrical pin is installed inside the pin hole. Multiple heat dissipation grooves are opened at one end of the moving contact piece. Conductive elements are installed on adjacent sides of the two moving contact pieces.

[0006] In a preferred embodiment of this utility model, the adjacent moving contact piece and the adjacent transmission piece are in close contact.

[0007] As a preferred embodiment of this utility model, both the moving contact piece and the transmission piece are provided with hexagonal holes.

[0008] As a preferred embodiment of this utility model, the movable contact piece is provided with a connecting hole, the first bolt passes through the connecting hole, and both the transmission piece and the movable contact piece are provided with through holes, the second bolt passes through the through holes.

[0009] As a preferred embodiment of this utility model, a positioning hole corresponding to the pin hole is provided through the main shaft.

[0010] As a preferred embodiment of this utility model, the outer side of the main shaft is provided with a plurality of insulating skirts along the length direction.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a transmission plate to drive the moving contact plate through a second bolt, eliminating the need for a plastic shell to drive the moving contact plate. This exposes most of the moving contact plate, and the transmission plate is made of aluminum alloy, resulting in fast heat conduction between the transmission plate and the moving contact plate, thereby improving the heat dissipation capacity of the moving contact plate. At the same time, the heat dissipation grooves further enhance the heat dissipation capacity of the moving contact plate, preventing the moving contact plate from overheating. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 This is a schematic diagram of the moving contact assembly of this utility model;

[0015] Figure 4 This is a schematic diagram of the main shaft of this utility model;

[0016] Figure 5 This is an exploded view of the moving contact assembly of this utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the isolation contact of this utility model.

[0018] In the diagram: 1. Frame; 2. Spindle; 3. Isolating contact; 4. Grounding contact; 5. Insulating skirt; 6. Moving contact assembly; 61. Moving contact piece; 62. Transmission piece; 63. Limiting sleeve; 64. First nut; 65. Heat dissipation groove; 66. Cylindrical pin; 67. Second bolt; 68. Elastic element; 69. First bolt; 610. Second nut; 611. Conductive element; 612. Pin hole; 7. Positioning hole; 8. Hexagonal hole; 9. Through hole; 10. Connecting hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 6This utility model provides a technical solution: a disconnecting switch, including a frame 1, a main shaft 2 rotatably mounted on the frame 1, a grounding contact 4 fixedly mounted on the front of the frame 1, and an disconnecting contact 3 disposed at the rear of the frame 1. The disconnecting contact 3 is sleeved on the outside of the main shaft 2. Three moving contact assemblies 6 are equally spaced on the outside of the main shaft 2. Each moving contact assembly 6 includes two moving contact pieces 61 and two transmission pieces 62 sleeved on the main shaft 2. The moving contact pieces 61 are made of copper alloy, and the transmission pieces 62 are made of aluminum alloy. The strength of aluminum alloy is much higher than that of the plastic shell in the prior art, which improves the reliability of the structure. The transmission pieces 62 are... The second bolt 67 can drive the movable contact 61 to rotate, eliminating the need for a plastic shell to rotate the movable contact 61. This exposes most of the movable contact 61. Furthermore, the transmission plate 62 is made of aluminum alloy, allowing for rapid heat conduction between the transmission plate 62 and the movable contact 61, thus significantly improving the heat dissipation capacity of the movable contact 61 and preventing overheating. Two movable contacts 61 are located between two transmission plates 62, and a second bolt 67 passes between them. The second bolt 67 and the second nut 610 are used to fix the transmission plate 62 and the movable contact 61. One end of the second bolt 67 is threaded with a second nut. Two nuts 610 are used. A first bolt 69 is installed between the two moving contact pieces 61. Two elastic elements 68, which can be disc springs, are sleeved on the outside of the first bolt 69. The elastic elements 68 are used to provide continuous pressure to the moving contact pieces 61, thereby ensuring stable contact between the moving contact pieces 61 and the grounding contact 4. One end of the first bolt 69 is threaded to the first nut 64. A limiting sleeve 63 is provided in the middle of both the second bolt 67 and the first bolt 69. The limiting sleeve 63 is used to block the two moving contact pieces 61 from getting too close. A pin hole 612 is opened on the transmission plate 62. A cylindrical pin 66 is installed inside the pin hole 612. Pin 66 is inserted into cylindrical pin 66 and positioning hole 7 to fix moving contact 61 on spindle 2, so that moving contact 61 cannot slide on spindle 2, ensuring that moving contact 61 is firmly installed. Multiple heat dissipation grooves 65 are opened at one end of moving contact 61, which can improve the heat dissipation capacity of moving contact 61. Conductive element 611 is installed on the adjacent side of two moving contact 61. Conductive element 611 can be spring contact finger. Grooves for accommodating conductive element 611 are opened on both moving contact 61 and isolation contact 3. One side of conductive element 611 is close to moving contact 61, and the other side of conductive element 611 is close to isolation contact 3 to achieve conductivity.

[0021] The adjacent moving contact 61 is in close contact with the adjacent transmission plate 62 so that some of the heat from the moving contact 61 can be transferred to the transmission plate 62 for heat dissipation.

[0022] Both the moving contact plate 61 and the transmission plate 62 are provided with hexagonal holes 8, and the transmission plate 62 can rotate together with the main shaft 2 through the hexagonal holes 8.

[0023] The movable contact piece 61 has a connecting hole 10, and the first bolt 69 passes through the connecting hole 10. The connecting hole 10 allows the first bolt 69 to pass through the movable contact piece 61 for fixing. The transmission piece 62 and the movable contact piece 61 both have through holes 9, which allow the second bolt 67 to pass through the movable contact piece 61 and the transmission piece 62 for fixing. The second bolt 67 passes through the through hole 9.

[0024] The main shaft 2 has a positioning hole 7 corresponding to the pin hole 612. The cylindrical pin 66 passes through the pin hole 612 and is inserted into the positioning hole 7 to fix the transmission plate 62 to the main shaft 2.

[0025] The main shaft 2 has multiple insulating skirts 5 along its length on its outer side, and there is at least one insulating skirt 5 between two adjacent moving contact assemblies 6. The insulating skirts 5 are used to enhance insulation performance and improve safety.

[0026] Specifically, during operation, the external operating mechanism causes the main shaft 2 to rotate, and the main shaft 2 causes the transmission plate 62 to rotate through the hexagonal hole 8. The transmission plate 62 drives the moving contact plate 61 to rotate through the second bolt 67, thereby causing the moving contact plate 61 to perform an action.

[0027] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0028] Furthermore, the terms "first," "second," "third," and "fourth" 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," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A disconnecting switch, comprising a frame (1), a main shaft (2) rotatably mounted on the frame (1), a grounding contact (4) fixedly mounted on the front of the frame (1), and an isolation contact (3) disposed at the rear of the frame (1), wherein the isolation contact (3) is sleeved on the outside of the main shaft (2), characterized in that: Three movable contact assemblies (6) are equally spaced on the outer side of the main shaft (2). Each movable contact assembly (6) includes two movable contact pieces (61) and two transmission pieces (62) sleeved on the main shaft (2). The two movable contact pieces (61) are located between the two transmission pieces (62). A second bolt (67) passes between the two movable contact pieces (61) and the two transmission pieces (62). One end of the second bolt (67) is threaded with a second nut (610). A first bolt (69) is installed between the two movable contact pieces (61). Two elastic elements (68) are sleeved on the outside of the first bolt (69). One end of the first bolt (69) is threaded to the first nut (64). The second bolt (67) and the first bolt (69) are both provided with a limiting sleeve (63) in the middle. The transmission plate (62) is provided with a pin hole (612). A cylindrical pin (66) is installed inside the pin hole (612). One end of the moving contact plate (61) is provided with a plurality of heat dissipation grooves (65). A conductive element (611) is installed on the adjacent side of the two moving contact plates (61).

2. The disconnecting switch according to claim 1, characterized in that: The adjacent moving contact piece (61) is in close contact with the adjacent transmission piece (62).

3. The disconnecting switch according to claim 1, characterized in that: Both the moving contact plate (61) and the transmission plate (62) are provided with hexagonal holes (8).

4. A disconnecting switch according to claim 1, characterized in that: The movable contact piece (61) has a connecting hole (10), and the first bolt (69) passes through the connecting hole (10). Both the transmission piece (62) and the movable contact piece (61) have through holes (9), and the second bolt (67) passes through the through holes (9).

5. A disconnecting switch according to claim 1, characterized in that: The main shaft (2) has a positioning hole (7) that corresponds to the pin hole (612).

6. A disconnecting switch according to claim 1, characterized in that: The outer side of the main shaft (2) is provided with multiple insulating skirts (5) along the length direction.

Images