Single-phase three-position switch structure

Abstract

The utility model relates to the technical field of switches, and discloses a single-phase three-position switch structure, which comprises a switch shell, a moving contact assembly component is arranged at the left end in the switch shell, a static contact component is arranged at the right end in the switch shell, a grounding contact seat component is arranged at the upper part in the switch shell, and the grounding contact seat component is arranged at the lower part in the switch shell. And the moving contact assembling component comprises a basin-type insulator. The single-phase three-position switch structure is used for on-site acceptance of withstand voltage of a GIS for an electric power system, because the on-site acceptance of the withstand voltage value of the body is higher than that of a voltage transformer, the voltage transformer and the body are not allowed to carry out on-site withstand voltage together, and the connection mode of the single-phase three-position switch structure is adopted. The voltage transformer can be disconnected from the interval body through the internal structure of the three-position switch, so that the voltage transformer does not need to be disassembled and assembled, the risk of discharge caused by dust entering during disassembly and assembly is avoided, and the power transmission time is shortened and the installation efficiency is improved due to the fact that disassembly and assembly are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, and more specifically to a single-phase three-position switch structure. Background Art

[0002] 126kV combined electrical equipment is a new type of high-voltage power equipment. Based on the advantages of GIS combined electrical equipment such as compactness, high reliability, and low operation and maintenance workload, the busbars installed and connected to GIS on site are retained as conventional AIS layouts. At the same time, the shortcomings of the original conventional AIS equipment, such as large floor space, many connection links, and large maintenance workload, are cleverly solved. It is used in power transmission and distribution systems such as power plants, substations, stations and docks, and large industrial and mining enterprises, and is especially suitable for projects with limited land such as mountain substations and urban substations. It can be installed indoors, outdoors, or on roofs.

[0003] With the rapid development of my country's power industry and the continuous rise in urban land prices, the increase in the voltage level entering the city, the continuous increase in the capacity and load of the power grid, the market demand for 126kV combined electrical appliances will maintain a steady and rapid upward trend. As a result, a new type of GIS insulation technology product has also emerged. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a single-phase three-position switch structure to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a single-phase three-position switch structure, comprising a switch housing, a moving contact assembly component is installed at the left end inside the switch housing, a static contact component is installed at the right end inside the switch housing, a grounding contact seat component is installed above the inside of the switch housing, the moving contact assembly component comprises a basin insulator, the basin insulator is fixedly installed at the left end inside the switch housing, a moving contact support seat is fixedly installed on the right side of the basin insulator, a moving conductive rod is slidably connected to the inside of the moving contact support seat, a rack is fixedly connected to the inside below the moving conductive rod through an expansion pin, a transmission gear is provided inside the moving contact support seat, the top of the transmission gear is meshed with the bottom of the rack, the grounding contact seat component comprises a grounding insulator, the grounding insulator is fixedly installed above the inside of the switch housing, the bottom of the grounding insulator is fixedly connected to the grounding support seat, and the static contact assembly comprises a static contact seat, which is fixedly installed at the right end inside the switch housing.

[0006] Furthermore, No. 1 conductive contact grease is provided at both ends of the moving contact support seat, a No. 1 guide sleeve is fixedly embedded in the moving contact support seat, and the outer wall of the moving conductive rod is slidably connected to the inside of the No. 1 guide sleeve.

[0007] Furthermore, the left end of the movable conductive rod is movably inserted into the interior of the lower right side of the grounding support seat, a No. 2 conductive contact grease is provided in the interior of the lower right side of the grounding support seat, a No. 2 guide sleeve is fixedly embedded in the interior of the lower right side of the grounding support seat, and the left end of the rack is movably sleeved in the interior of the No. 2 guide sleeve.

[0008] Furthermore, a No. 3 conductive contact grease is provided inside the upper left side of the static contact seat, and a No. 3 guide sleeve is fixedly embedded inside the upper left side of the static contact seat.

[0009] Furthermore, a bearing is fixedly installed inside the front side of the switch housing, a rotating shaft is rotatably connected inside the bearing, one end of the rotating shaft extends to the outside of the switch housing, an oil seal is installed inside the front side of the switch housing, and the oil seal is sleeved on the outer wall of the rotating shaft.

[0010] Furthermore, the other end of the rotating shaft is fixedly connected to an insulating shaft, and one end of the insulating shaft is fixedly connected to one side of the transmission gear.

[0011] Technical effects and advantages of the utility model:

[0012] 1. The utility model is used for the on-site acceptance of withstand voltage of GIS for power system. Since the withstand voltage value of the main body on-site acceptance must be higher than the withstand voltage value of the voltage transformer, the voltage transformer and the main body are not allowed to withstand voltage on-site together. By adopting the connection mode of the single-phase three-position switch structure, the voltage transformer can be disconnected from the interval main body through the internal structure of the three-position switch, so there is no need to disassemble the voltage transformer, avoiding the risk of discharge caused by dust entering during disassembly and assembly. Since disassembly and assembly are not required, the power supply time is shortened and the installation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0015] Figure 3 It is a schematic cross-sectional view of the overall side structure of the utility model.

[0016] The accompanying drawings are marked as follows: 1. Moving contact assembly; 11. Basin insulator; 12. Moving contact support seat; 13. Moving conductive rod; 14. Conductive contact grease No. 1; 15. Guide sleeve No. 1; 2. Grounding contact seat assembly; 21. Grounding insulator; 22. Grounding support seat; 23. Conductive contact grease No. 2; 24. Guide sleeve No. 2; 3. Switch housing; 4. Stationary contact assembly; 41. Stationary contact seat; 42. Conductive contact grease No. 3; 43. Guide sleeve No. 3; 5. Rack; 6. Transmission gear; 61. Rotating shaft; 62. Bearing; 63. Insulating shaft; 64. Oil seal. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The single-phase three-position switch structure involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0018] Embodiment 1:

[0019] like Figure 1-3As shown, a single-phase three-position switch structure includes a switch housing 3, a moving contact assembly component 1 is installed at the left end inside the switch housing 3, a static contact assembly 4 is installed at the right end inside the switch housing 3, a grounding contact seat assembly 2 is installed above the switch housing 3, the moving contact assembly component 1 includes a pot-type insulator 11, the pot-type insulator 11 is fixedly installed at the left end inside the switch housing 3, a moving contact support seat 12 is fixedly installed on the right side of the pot-type insulator 11, a moving conductive rod 13 is slidably connected to the inside of the moving contact support seat 12, a rack 5 is fixedly connected to the inside of the moving conductive rod 13 through an expansion pin, a transmission gear 6 is provided inside the moving contact support seat 12, the top of the transmission gear 6 is meshed with the bottom of the rack 5, a No. 1 conductive contact grease 14 is provided at both ends of the moving contact support seat 12, a No. 1 guide sleeve 15 is fixedly inlaid inside the moving contact support seat 12, and the outer wall of the moving conductive rod 13 is slidably connected to the No. 1 guide sleeve 1 5, the grounding contact seat assembly 2 includes a grounding insulator 21, which is fixedly installed on the upper part of the switch housing 3, and the bottom of the grounding insulator 21 is fixedly connected to a grounding support seat 22, the left end of the movable conductive rod 13 is movably inserted into the interior of the lower right side of the grounding support seat 22, and the interior of the lower right side of the grounding support seat 22 is provided with a No. 2 conductive contact grease 23, and the interior of the lower right side of the grounding support seat 22 is fixedly inlaid with a No. 2 guide sleeve 24, the left end of the rack 5 is movably sleeved in the interior of the No. 2 guide sleeve 24, and a bearing 62 is fixedly installed inside the front of the switch housing 3, and a rotating shaft 61 is rotatably connected inside the bearing 62, and one end of the rotating shaft 61 extends to the outside of the switch housing 3, and an oil seal 64 is installed inside the front of the switch housing 3, and the oil seal 64 is sleeved on the outer wall of the rotating shaft 61, and the other end of the rotating shaft 61 is fixedly connected to an insulating shaft 63, and one end of the insulating shaft 63 is fixedly connected to one side of the transmission gear 6.

[0020] In this embodiment, the setting of the rotating shaft 61 and the insulating shaft 63 makes it convenient for the user to rotate the transmission gear 6. The rotation of the transmission gear 6 facilitates the driving of the rack 5 to move. At this time, the force is transformed from circular motion to linear motion. The rack 5 is tightly connected to the moving conductive rod 13 through the expansion pin, thereby driving the moving conductive rod 13 to move left and right. When the moving conductive rod 13 moves to the left, the moving contact support seat 12 is connected to the grounding contact seat assembly 2 through the moving conductive rod 13, so that the moving contact support seat 12 and the grounding contact seat assembly 2 can be turned on. At this time, the grounding circuit is connected. When the moving conductive rod 13 moves to the right, the moving conductive rod 13 is retracted into the moving contact support seat 12. At this time, the state is the isolation and grounding state.

[0021] Embodiment 2:

[0022] like Figure 1-3As shown, the stationary contact assembly 4 includes a stationary contact seat 41, which is fixedly installed at the right end of the switch housing 3. A No. 3 conductive contact grease 42 is provided inside the upper left side of the stationary contact seat 41, and a No. 3 guide sleeve 43 is fixedly embedded inside the upper left side of the stationary contact seat 41.

[0023] In this embodiment, when the moving conductive rod 13 continues to move to the right, the right end of the moving conductive rod 13 comes out from the moving contact support seat 12 and is connected to the static contact seat 41 on the right, so that the moving contact support seat 12 and the static contact seat 41 can be conductive, and the isolation and closing process can be completed.

[0024] In summary, if Figure 1-3 As shown, this single-phase three-position switch structure, when in use, the grounding circuit:

[0025] The single-phase three-position switch structure adopts manually rotating the rotating shaft 61 as the power source, so that the rotation of the rotating shaft 61 drives the insulating shaft 63 and the transmission gear 6 to rotate, and the transmission gear 6 rotates, thereby driving the rack 5 to move, and the rack 5 drives the moving conductive rod 13 to move left and right. When the left end of the moving conductive rod 13 moves to the lower right side of the grounding support seat 22 of the grounding contact seat assembly 2, the moving contact support seat 12 is connected to the grounding contact seat assembly 2 through the moving conductive rod 13. Because the moving conductive rod 13 can exert a certain pressure through the No. 2 conductive contact grease 23 and the No. 1 conductive contact grease 14, the moving contact support seat 12 and the grounding contact seat assembly 2 can be connected, avoiding the virtual connection phenomenon. At this time, the grounding circuit is connected;

[0026] Ground disconnect, isolation disconnect circuit:

[0027] Rotate the rotating shaft 61 in the opposite direction, and drive the movable conductive rod 13 to move rightward in the same way. When the left end of the movable conductive rod 13 is separated from the grounding contact seat assembly 2, and the movable conductive rod 13 is retracted into the movable contact support seat 12, the state at this time is the isolation and grounding opening state;

[0028] Isolation closing, grounding opening status:

[0029] This state is also called the state in normal operation. When the moving conductive rod 13 continues to move to the right, the right end of the moving conductive rod 13 comes out from the moving contact support seat 12 and moves to the upper left side of the static contact seat 41, so as to be connected with the static contact seat 41. Since the moving conductive rod 13 can exert a certain pressure and tension through the No. 3 conductive contact grease 42 and the No. 1 conductive contact grease 14, the moving contact support seat 12 and the static contact seat 41 can be connected, so they can contact each other well, and the isolation closing process is completed at this time;

[0030] The movement in each of the above states is that the transmission gear 6 and the rack 5 drive the moving conductive rod 13 to do reciprocating motion in the moving contact support seat 12. This movement is converted into the linear motion of the moving rack 5 and the moving conductive rod 13 through the rotational motion of the transmission gear 6, thereby completing the three states of isolation open - isolation grounding open - grounding closed, commonly known as the three positions of the three-position switch.

[0031] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0032] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A single-phase three-position switch structure, comprising a switch housing (3), characterized in that: A moving contact assembly component (1) is installed at the left end of the switch housing (3), a stationary contact component (4) is installed at the right end of the switch housing (3), a grounding contact seat component (2) is installed above the switch housing (3), the moving contact assembly component (1) comprises a pot-type insulator (11), the pot-type insulator (11) is fixedly installed at the left end of the switch housing (3), a moving contact support seat (12) is fixedly installed on the right side of the pot-type insulator (11), a moving conductive rod (13) is slidably connected to the inside of the moving contact support seat (12), and the moving conductive rod (13) is connected to the grounding contact seat. ) is fixedly connected to a rack (5) through an expansion pin inside the moving contact support seat (12), a transmission gear (6) is provided inside the moving contact support seat (12), the top of the transmission gear (6) is meshed with the bottom of the rack (5), the grounding contact seat assembly (2) includes a grounding insulator (21), the grounding insulator (21) is fixedly installed above the inside of the switch housing (3), the bottom of the grounding insulator (21) is fixedly connected to a grounding support seat (22), and the static contact assembly (4) includes a static contact seat (41), and the static contact seat (41) is fixedly installed at the right end inside the switch housing (3).

2. A single-phase three-position switch structure according to claim 1, characterized in that: A No. 1 conductive contact grease (14) is provided at both ends of the interior of the moving contact support seat (12), a No. 1 guide sleeve (15) is fixedly embedded in the interior of the moving contact support seat (12), and the outer wall of the moving conductive rod (13) is slidably connected to the interior of the No. 1 guide sleeve (15).

3. A single-phase three-position switch structure according to claim 1, characterized in that: The left end of the movable conductive rod (13) is movably inserted into the interior of the lower right side of the grounding support seat (22); a No. 2 conductive contact grease (23) is provided in the interior of the lower right side of the grounding support seat (22); a No. 2 guide sleeve (24) is fixedly embedded in the interior of the lower right side of the grounding support seat (22); and the left end of the rack (5) is movably sleeved in the interior of the No. 2 guide sleeve (24).

4. A single-phase three-position switch structure according to claim 1, characterized in that: A No. 3 conductive contact grease (42) is provided inside the upper left side of the static contact seat (41), and a No. 3 guide sleeve (43) is fixedly embedded inside the upper left side of the static contact seat (41).

5. A single-phase three-position switch structure according to claim 1, characterized in that: A bearing (62) is fixedly installed inside the front side of the switch housing (3); a rotating shaft (61) is rotatably connected inside the bearing (62); one end of the rotating shaft (61) extends to the outside of the switch housing (3); an oil seal (64) is installed inside the front side of the switch housing (3); and the oil seal (64) is sleeved on the outer wall of the rotating shaft (61).

6. A single-phase three-position switch structure according to claim 5, characterized in that: The other end of the rotating shaft (61) is fixedly connected to an insulating shaft (63), and one end of the insulating shaft (63) is fixedly connected to one side of the transmission gear (6).

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