Disconnecting switch of power distribution cabinet

Abstract

The utility model discloses an isolating switch of a power distribution cabinet, which relates to the field of isolating switches and comprises a shell, and static contacts are arranged on symmetrical sides of the shell. The sliding shell horizontally slides in the outer shell, and a carrying frame elastically ascends, descends and slides in the sliding shell through a spring; the movable contact piece is fixedly connected with the carrier frame; the swing mechanism is used for driving the sliding shell to slide in the outer shell, so that the movable contact piece and the static contact piece are aligned or staggered, a movable inclined block is fixed to the surface of the carrier, a static inclined block is fixed to the inner wall of the outer shell, and when the movable contact piece and the static contact piece move to be aligned, the movable inclined block and the static inclined block extrude to enable the carrier to descend, and the movable contact piece extrudes and makes contact with the static contact piece. According to the utility model, the switch of the circuit is controlled by moving the movable contact piece left and right, and the movable contact piece and the static contact piece are close to each other in the closing process through the contact between the movable inclined block and the inclined surface of the static inclined block, so that the movable contact piece and the static contact piece have stronger contact pressure, the connection resistance is reduced, and the heat generation is reduced.

Description

Technical Field

[0001] The utility model relates to the field of isolating switches, in particular to an isolating switch for a power distribution cabinet. Background Art

[0002] The isolating switch is arranged in the power distribution cabinet to cut off the circuit. By separating the moving and static contacts of the isolating switch, the circuit is kept safely cut off, which facilitates the maintenance and overhaul of the power distribution cabinet equipment and other safe operations. The isolating switch separates the moving and static contacts by dislocation. When closing the circuit, the moving and static contacts need to be fitted together. However, the fitting parts of the moving and static contacts of the traditional isolating switch lack external pressure, the fitting tightness is not high, and the fitting parts of the moving and static contacts are prone to heat up. Utility Model Content

[0003] The utility model aims to provide an isolating switch for a power distribution cabinet, and solves the following technical problems: how to keep the moving and static contacts of the isolating switch in a closed state in close contact.

[0004] In order to solve the problems existing in the prior art, the technical solution adopted by the utility model is as follows:

[0005] The housing has a symmetrical side provided with a static contact piece;

[0006] A sliding shell slides horizontally in the outer shell, and a carrier is arranged in the sliding shell through elastic lifting and sliding of a spring;

[0007] A moving contact piece, the moving contact piece is fixedly connected to the carrier;

[0008] The swing mechanism is used to drive the sliding shell to slide in the outer shell so that the moving contact piece and the static contact piece are aligned or misaligned. A moving bevel block is fixed on the surface of the carrier, and a static bevel block is fixed on the inner wall of the outer shell. When the moving contact piece and the static contact piece move and align, the moving bevel block and the static bevel block squeeze the carrier to descend and the moving contact piece squeezes and contacts the static contact piece.

[0009] Preferably, the swing mechanism includes a swing arm and a limit column, two limit columns are fixed on the surface of the sliding shell, one end of the swing arm rotates with the outer shell, the free end of the swing arm passes through between the limit columns, an elastic telescopic arm is rotatably arranged on the surface of the outer shell at a symmetrical position of the swing arm, the elastic telescopic arm is rotatably connected to the free end of the swing arm, and the handle coaxially fixes the swing arm.

[0010] Preferably, the elastic telescopic arm comprises a telescopic cylinder and a telescopic rod which are slidably connected, a spring is connected between the telescopic cylinder and the telescopic rod, the telescopic cylinder is rotatably connected to the shell, and the telescopic rod is rotatably connected to the swing arm.

[0011] Preferably, the swing mechanism is externally encapsulated with a shell, the handle is placed outside the shell, and a switch mark is provided on the surface of the shell.

[0012] Preferably, a plurality of pairs of stationary contact pieces are arranged on the symmetrical sides of the housing, and a plurality of moving contact pieces are connected to the carrier together.

[0013] Preferably, the housing is formed by sealing and pasting two upper and lower parts.

[0014] Compared with the related art, the utility model has the following beneficial effects:

[0015] The utility model controls the switch of the circuit by moving the moving contact piece left and right. The moving inclined block and the static inclined block are in contact with each other, so that the moving contact piece and the static contact piece are close to each other during the closing process, so that the moving contact piece and the static contact piece have a strong contact pressure, the connection resistance is reduced, and the heat generation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the distribution structure of the static contact piece and the dynamic contact piece of the utility model;

[0018] Figure 3 This is a schematic diagram of the mounting structure of the carrier of the utility model;

[0019] Figure 4 It is a schematic diagram of the alignment structure of the dynamic bevel block and the static bevel block of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the swing mechanism of the utility model.

[0021] Figure numerals: 1, outer shell; 2, static contact piece; 3, sliding shell; 31, linear groove; 4, moving contact piece; 5, handle; 51, shell; 52, switch mark; 53, swing arm; 54, limit column; 55, telescopic cylinder; 56, telescopic rod; 6, carrier; 7, dynamic inclined block; 71, static inclined block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-4 As shown, the power distribution cabinet isolating switch has a housing 1, a plurality of groups of static contacts 2 are installed on the front and rear symmetrical sides of the housing 1, a sliding housing 3 slides horizontally in the housing 1, a carrier 6 slides vertically in the sliding housing 3, and a spring is used to support the carrier 6 upward, a plurality of groups of moving contacts 4 are fixed through the surface of the carrier 6, and the two ends of the moving contacts 4 are aligned with the static contacts 2 distributed front and back;

[0024] like Figure 4As shown, the upper surface of the sliding shell 3 is provided with a straight groove 31 running through the left and right sides, the upper surface of the carrier 6 is located in the straight groove 31 to fix the dynamic bevel block 7, and the inner top surface of the housing 1 is fixed with a static bevel block 71, and the static bevel block 71 is aligned with the dynamic bevel block 7;

[0025] like Figure 1 , 5 As shown, the swing mechanism includes a swing arm 53 and a limit column 54. Two limit columns 54 are fixed on the surface of the sliding shell 3. One end of the swing arm 53 rotates with the shell 1. The free end of the swing arm 53 passes through between the limit columns 54. The elastic telescopic arm includes a telescopic cylinder 55 and a telescopic rod 56 that are slidably plugged. A spring is connected between the telescopic cylinder 55 and the telescopic rod 56. The telescopic cylinder 55 is rotatably connected to the shell 1, and the rotating part is symmetrical with the rotating part of the swing arm 53. The telescopic rod 56 is rotatably connected to the swing arm 53, and the handle 5 coaxially fixes the swing arm 53.

[0026] The aligned static contact pieces 2 are connected to the same circuit. When the circuit is closed, the handle 5 is held and the swing arm 53 is rotated to push the limit column 54 to drive the carrier 6 to slide leftward, so that the moving contact piece 4 is close to the static contact piece 2. When the left and right positions of the moving contact piece 4 and the static contact piece 2 are nearly aligned, the moving inclined block 7 and the static inclined block 71 are in contact with each other, so that the carrier 6 drives the moving contact piece 4 to overcome the elastic force and descend. The moving contact piece 4 is aligned with the static contact piece 2 and presses downward to contact the static contact piece 2 tightly, so that the circuit is connected.

[0027] When the swing arm 53 is swung by holding the handle 5, the distance between the swing arm 53, the telescopic rod 56 and the telescopic cylinder 55 is the shortest when they form a straight line. Therefore, when the swing arm 53 deviates to both sides, the elastic extension of the telescopic rod 56 and the telescopic cylinder 55 can resist the swing arm 53 to maintain the deflected state, which has a locking effect on the connection or separation of the moving contact piece 4 and the static contact piece 2.

[0028] like Figure 1 As shown, the swing mechanism is encapsulated with a shell 51 outside, the handle 5 is placed outside the shell 51, and a switch mark 52 is provided on the surface of the shell 51. By aligning the handle 5 with the switch mark 52, it can be determined whether the moving contact piece 4 and the stationary contact piece 2 are in a closed or disconnected state;

[0029] The housing 1 is formed by sealing and laminating two parts made of upper and lower insulating materials, and the edges are fixed with screws. The screws can be removed later to open the parts and inspect and maintain the internal components of the housing 1.

[0030] 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 power distribution cabinet isolating switch, characterized in that: include: A housing (1), wherein a stationary contact piece (2) is provided on a symmetrical side of the housing (1); A sliding shell (3), the sliding shell (3) slides horizontally in the outer shell (1), and a carrier (6) is provided in the sliding shell (3) to slide and elevate elastically through a spring; A movable contact piece (4), the movable contact piece (4) being fixedly connected to the carrier (6); The swing mechanism is used to drive the sliding shell (3) to slide in the outer shell (1) so that the moving contact piece (4) and the static contact piece (2) are aligned or misaligned. A moving inclined block (7) is fixed on the surface of the carrier (6), and a static inclined block (71) is fixed on the inner wall of the outer shell (1). When the moving contact piece (4) and the static contact piece (2) are moved and aligned, the moving inclined block (7) and the static inclined block (71) squeeze the carrier (6) to descend, and the moving contact piece (4) squeezes and contacts the static contact piece (2).

2. The power distribution cabinet isolating switch according to claim 1, characterized in that: The swing mechanism comprises a swing arm (53) and a limiting column (54); two limiting columns (54) are fixed on the surface of the sliding shell (3); one end of the swing arm (53) rotates with the outer shell (1); the free end of the swing arm (53) passes through between the limiting columns (54); an elastic telescopic arm is rotatably arranged on the surface of the outer shell (1) at a symmetrical position of the swing arm (53); the elastic telescopic arm is rotatably connected to the free end of the swing arm (53); and the handle (5) coaxially fixes the swing arm (53).

3. The power distribution cabinet isolating switch according to claim 2, characterized in that: The elastic telescopic arm comprises a telescopic cylinder (55) and a telescopic rod (56) which are slidably plugged in, a spring is connected between the telescopic cylinder (55) and the telescopic rod (56), the telescopic cylinder (55) is rotatably connected to the housing (1), and the telescopic rod (56) is rotatably connected to the swing arm (53).

4. The power distribution cabinet isolating switch according to claim 2, characterized in that: The swing mechanism is encapsulated externally with a housing (51), the handle (5) is placed outside the housing (51), and a switch mark (52) is provided on the surface of the housing (51).

5. The power distribution cabinet isolating switch according to claim 1, characterized in that: A plurality of pairs of stationary contact pieces (2) are arranged on symmetrical sides of the housing (1), and a plurality of moving contact pieces (4) are commonly connected to a carrier (6).

6. The power distribution cabinet isolating switch according to claim 1, characterized in that: The housing (1) is formed by sealingly fitting two parts, upper and lower.

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