Structure for improving 500KV disconnecting switch VFTO

Abstract

The utility model provides a structure for improving a 500KV disconnecting switch VFTO. The structure comprises a shell and a static contact body, the static contact body is arranged on one side of the shell, a first contact and a dynamic contact body are arranged in the static contact body, the dynamic contact body is arranged in the shell, and a second contact is arranged in the dynamic contact body. According to the structure for improving the 500KV disconnecting switch VFTO, the dynamic contact body moves towards one side to drive the second contact and the first contact of the static contact body to be extruded for use, and the connection of the two ends of the contact is changed from a plug-in type to a contact type, so that the curvature of the moving contact is reduced, the electric field intensity is reduced, and the service life of the moving contact is prolonged. And arc extinguishing is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of disconnecting switches, in particular to a structure for improving a 500KV disconnecting switch VFTO. Background Art

[0002] An isolating switch is a switching device that is mainly used for "isolating power supply, switching operation, and connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts. When it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time.

[0003] The disconnector operates slowly. During the process of closing and breaking the small capacitance current, dozens or even hundreds of reignitions will occur, causing the reflection and refraction components of the step voltage traveling wave to be continuously superimposed, forming a steep wave head and high-frequency steep wave front overvoltage. The steep wave front overvoltage is divided into internal transient and external transient. The former is commonly known as ultra-fast transient overvoltage, which may cause main insulation breakdown, short circuit to ground, main insulation damage of transformer and other accidents. When VFTO propagates to the bushing in a traveling wave manner, an external transient is formed, which may endanger secondary equipment and adjacent high-voltage equipment. The current contact electric field strength is large and it is not easy to extinguish the arc. During the movement of the moving contact part, the arc moves from the broken arc contact to the shielding cover. The arc moving to the shielding cover generates a high electric field and causes ground breakdown.

[0004] Therefore, it is necessary to provide a structure that improves the 500KV disconnector VFTO to solve the above technical problems. Utility Model Content

[0005] The utility model provides a structure for improving the VFTO of a 500KV isolating switch, which solves the problem that the voltage difference at both ends of the contacts of the existing isolating switch causes the contact gap to break down, resulting in an ultra-fast transient overvoltage VFTO and generating an arc.

[0006] In order to solve the above technical problems, the utility model provides a structure for improving a 500KV disconnector VFTO, comprising:

[0007] case;

[0008] A static contact body, wherein the static contact body is arranged at one side of the housing, and a first contact is arranged inside the static contact body;

[0009] A dynamic contact body is arranged inside the shell, and a second contact is arranged inside the dynamic contact body.

[0010] Preferably, a rotating rod is provided inside the shell, and a mounting frame is fixedly connected to one side of the rotating rod.

[0011] Preferably, a limiting groove is provided inside the rotating rod, and a limiting block is slidably connected inside the limiting groove.

[0012] Preferably, a limiting spring is arranged on one side of the limiting block and inside the limiting groove, two sliding grooves are arranged inside the rotating rod, and sliding blocks are slidably connected inside the two sliding grooves.

[0013] Preferably, one end of the two sliding blocks is fixedly connected to the top and the bottom of the limiting block respectively, and one end of the two sliding blocks is fixedly connected to the limiting sleeve.

[0014] Preferably, a positioning piece is provided inside the limiting sleeve, and the positioning piece comprises a positioning hole, and a positioning pin is threadedly connected inside the positioning hole.

[0015] Preferably, a fixing hole is provided inside the shell, and a fixing pin is slidably connected inside the fixing hole.

[0016] Compared with the related art, the structure of improving the 500KV isolating switch VFTO provided by the utility model has the following beneficial effects:

[0017] The utility model provides an improved structure of a 500KV disconnector VFTO, in which a dynamic contact body is moved to one side to drive a second contact and a first contact of a static contact body to be extruded for use, and the connection at both ends of the contact is changed from an insertion type to a contact type, thereby reducing the curvature of the moving contact and lowering the electric field strength, which is conducive to extinguishing the arc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a first embodiment of a 500KV disconnector VFTO structure improvement provided by the utility model;

[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the original static contact body is shown;

[0020] Figure 3 for Figure 1 The structural schematic diagram of the working state of the improved static contact body and the improved dynamic contact body shown;

[0021] Figure 4 for Figure 2 A structural schematic diagram of the working states of the original static contact body and the original dynamic contact body shown;

[0022] Figure 5 A schematic diagram of the structure of a second embodiment of a 500KV disconnector VFTO provided by the utility model;

[0023] Figure 6 for Figure 5 An enlarged schematic diagram of part A is shown.

[0024] Numbers in the figure: 1, housing, 2, static contact body, 3, first contact, 4, dynamic contact body, 5, second contact, 6, rotating rod, 7, limiting groove, 71, limiting block, 72, limiting spring, 73, limiting sleeve, 8, fixing hole, 81, fixing pin, 9, mounting bracket, 10, positioning piece, 11, sliding groove, 12, sliding block. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0026] First embodiment

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A schematic structural diagram of a first embodiment of a 500KV disconnector VFTO structure improvement provided by the utility model; Figure 2 for Figure 1 The schematic diagram of the structure of the original static contact body is shown; Figure 3 for Figure 1 The structural schematic diagram of the working state of the improved static contact body and the improved dynamic contact body shown; Figure 4 for Figure 2 A structural diagram of the working state of the original static contact body and the original dynamic contact body is shown. A structure for improving the 500KV disconnector VFTO includes:

[0028] Shell 1;

[0029] A static contact body 2, wherein the static contact body 2 is disposed on one side of the housing 1, and a first contact 3 is disposed inside the static contact body 2;

[0030] The dynamic contact body 4 is arranged inside the housing 1 , and a second contact 5 is arranged inside the dynamic contact body 4 .

[0031] The working principle of the structure of a 500KV isolating switch VFTO provided by the utility model is as follows:

[0032] When in use, the dynamic contact body 4 moves to one side to drive the second contact 5 and the first contact 3 of the static contact body 2 to be squeezed out for use.

[0033] Figure 2The first contact 3 of the original static contact body 2 and the second contact 5 of the dynamic contact body 4 are changed to Figure 1 The first contact 3 of the static contact body 2 and the second contact 5 of the dynamic contact body 4 are changed from the insertion type to the contact type, so that the curvature of the dynamic contact is reduced, the electric field strength is reduced, and it is beneficial to extinguish the arc.

[0034] Compared with the related art, the structure of improving the 500KV isolating switch VFTO provided by the utility model has the following beneficial effects:

[0035] The utility model provides a structure for improving a 500KV disconnector VFTO, wherein a dynamic contact body 4 is moved to one side to drive a second contact 5 and a first contact 3 of a static contact body 2 to be extruded for use, and the connection at both ends of the contact is changed from an insertion type to a contact type, thereby reducing the curvature of the moving contact and lowering the electric field strength, which is conducive to extinguishing the arc.

[0036] Second embodiment

[0037] Please refer to Figure 5 and Figure 6 Based on the structure of improving the 500KV disconnector VFTO provided by the first embodiment of the present application, the second embodiment of the present application proposes another structure of improving the 500KV disconnector VFTO. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0038] Specifically, the second embodiment of the present application provides an improved structure of a 500KV disconnector VFTO, which is different in that a rotating rod 6 is provided inside the shell 1, and a mounting bracket 9 is fixedly connected to one side of the rotating rod 6.

[0039] The top and the bottom of the mounting frame 9 are both fixedly connected with the rotating rod 6 , and the interior of the mounting frame 9 is fixedly mounted with the static contact body 2 .

[0040] The interior of the rotating rod 6 is provided with a limiting groove 7 , and the interior of the limiting groove 7 is slidably connected to a limiting block 71 .

[0041] A limiting spring 72 is disposed on one side of the limiting block 71 and inside the limiting groove 7 . Two sliding grooves 11 are formed inside the rotating rod 6 . Sliding blocks 12 are slidably connected inside the two sliding grooves 11 .

[0042] The rotating rod 6 is provided with two limiting grooves 7 , and the interiors of the two limiting grooves 7 are both slidably connected to limiting blocks 71 and are both provided with limiting springs 72 .

[0043] Sliding grooves 11 are provided at the top and bottom of the two limit grooves 7, and sliding blocks 12 are slidably connected inside the four sliding grooves 11. The tops and bottoms of the four sliding blocks 12 are respectively fixedly connected to the tops and bottoms of the two limit blocks 71, and the other ends are respectively fixedly connected to the surfaces of the inner walls of the two limit sleeves 73.

[0044] One end of the two sliding blocks 12 is fixedly connected to the top and bottom of the limiting block 71 , respectively. One end of the two sliding blocks 12 is fixedly connected to the limiting sleeve 73 .

[0045] A positioning member 10 is disposed inside the limiting sleeve 73 . The positioning member 10 includes a positioning hole. A positioning pin is threadedly connected inside the positioning hole.

[0046] The four limiting sleeves 73 are provided with positioning holes matched with the positioning pins, and the two rotating rods 6 are provided with four positioning holes matched with the positioning pins, which are used to limit the four limiting sleeves 73 after the four positioning pins are installed in the positioning holes.

[0047] The positioning pin is a bolt, and the positioning hole is a threaded hole matched with the positioning pin.

[0048] A fixing hole 8 is defined inside the housing 1 , and a fixing pin 81 is slidably connected inside the fixing hole 8 .

[0049] Four fixing holes 8 are provided inside the shell 1, and fixing pins 81 are slidably connected inside the four fixing holes 8. The four fixing pins 81 are respectively fixedly connected to one side of the four limit blocks 71. The fixing pins 81 are round rods, and the fixing holes 8 are round holes matched with the fixing pins 81, which are used to limit the rotating rod 6 while allowing the rotating rod 6 to rotate to one side.

[0050] The working principle of the structure of a 500KV isolating switch VFTO provided by the utility model is as follows:

[0051] When in use, the two limiting sleeves 73 are moved to one side, driving the four sliding blocks 12 to move to one side inside the four sliding grooves 11 respectively, thereby driving the limiting block 71 to move to one side inside the limiting groove 7 while squeezing the limiting spring 72.

[0052] When the two limit blocks 71 move to one side, the two fixing pins 81 are driven to move to one side inside the two fixing holes 8 respectively. When the two fixing pins 81 are separated from the inside of the two fixing holes 8, the two limit sleeves 73 are moved to one side to drive the mounting frame 9 connected to the rotating rod 6 connected to the two fixing pins 81 to rotate to one side to open for inspection. At the same time, the rotating rod 6 below can also be removed, the mounting frame 9 can be removed, and the static contact body 2 can be removed for replacement and repair.

[0053] Compared with the related art, the structure of improving the 500KV isolating switch VFTO provided by the utility model has the following beneficial effects:

[0054] The utility model provides an improved structure of a 500KV disconnector VFTO, by moving two limit sleeves 73 to one side, driving four sliding blocks 12 connected to two limit blocks 71 to move to one side, thereby driving two fixing pins 81 to separate inside two fixing holes 8 respectively, so that the mounting frame 9 is disassembled, thereby facilitating the disassembly of the static contact body 2 for maintenance or replacement.

[0055] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A structure for improving the 500KV disconnector VFTO, characterized in that: include: case; A static contact body, wherein the static contact body is arranged at one side of the housing, and a first contact is arranged inside the static contact body; A dynamic contact body, wherein the dynamic contact body is arranged inside the housing, and a second contact is arranged inside the dynamic contact body; The housing is provided with a rotating rod, one side of which is fixedly connected to a mounting bracket, a limiting slot is provided inside the rotating rod, a limiting block is slidably connected inside the limiting slot, a limiting spring is provided on one side of the limiting block and inside the limiting slot, two sliding slots are provided inside the rotating rod, sliding blocks are slidably connected inside the two sliding slots, and one end of the two sliding blocks is fixedly connected to a limiting sleeve; A fixing hole is provided inside the shell, and a fixing pin is slidably connected inside the fixing hole.

2. The structure of improving the 500KV disconnector VFTO according to claim 1 is characterized in that: One end of the two sliding blocks is fixedly connected to the top and bottom of the limiting block respectively.

3. The structure of improving the 500KV disconnector VFTO according to claim 1 is characterized in that: A positioning piece is arranged inside the limiting sleeve, and the positioning piece includes a positioning hole, and a positioning pin is threadedly connected inside the positioning hole.

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