disconnector main contactor

Abstract

The utility model relates to a disconnecting switch main switch blade, relate to disconnecting switch technical field, for solving the problem that the main switch blade of existing disconnecting switch exists, cannot satisfy the problem of sufficient insulation distance and small space occupation simultaneously, including main switch blade frame, crank arm support, crank arm, pull rod and conducting pipe, the first end of main switch blade frame has wiring board, its characterized in be including elastic soft connecting piece, the first end of crank arm is rotatably connected with main switch blade frame, the first end rotatably installed with conducting pipe pedestal of conducting pipe, conducting pipe pedestal is rotatably connected with the second end of main switch blade frame, the first end of pull rod is hinged with the second end of crank arm, the second end of pull rod is hinged with conducting pipe first end, the second end of conducting pipe has the contact board for with the static contact of disconnecting switch contact realizes closing, the first end of soft connecting piece is fixedly connected with main switch blade frame, the second end of soft connecting piece is fixedly connected with conducting pipe pedestal, realizes the electric connection of wiring board and conducting pipe pedestal through soft connecting piece.

Description

Technical Field

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

[0002] With the large-scale construction of ultra-high voltage (UHV) power grids, stringent requirements are placed on disconnecting switches for both "sufficient insulation distance" and "minimal space occupation." For double-column horizontal rotary disconnecting switches, the electric field distribution at the horizontal break is uneven, and the insulation efficiency of the air gap is much lower than that at the vertical break. To meet UHV insulation requirements, the horizontal distance needs to be further increased, which exacerbates the space occupation problem. For single-column vertical telescopic disconnecting switches, although the lateral footprint is small, the single-column support causes the conductive rod to be subjected to concentrated bending moments, which are prone to bending and deformation over long-term operation, resulting in a hidden reduction in insulation distance. Moreover, the insulating rod of the telescopic mechanism must withstand tension and bending moments, accelerating insulation aging and drastically increasing maintenance costs. The vertical telescopic stroke is structurally limited, making it difficult to stably achieve the ultra-long break distance required for UHV. Summary of the Invention

[0003] The purpose of this invention is to provide a disconnecting switch main switch that solves the problem that the main switch of existing disconnecting switches cannot simultaneously satisfy the requirements of sufficient insulation distance and small space occupation.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a disconnecting switch main knife, including a main knife frame, a crank arm bracket, a crank arm, a pull rod, and a conductive tube. The first end of the main knife frame has a terminal block and also includes an elastic flexible connector. The first end of the crank arm is rotatably connected to the main knife frame. The first end of the conductive tube is rotatably mounted with a conductive tube base. The conductive tube base is rotatably connected to the second end of the main knife frame. The first end of the pull rod is hinged to the second end of the crank arm, and the second end of the pull rod is hinged to the first end of the conductive tube. The second end of the conductive tube has a contact plate for contacting the stationary contact of the disconnecting switch to achieve closing. The first end of the flexible connector is fixedly connected to the main knife frame, and the second end of the flexible connector is fixedly connected to the conductive tube base. The electrical connection between the terminal block and the conductive tube base is achieved through the flexible connector.

[0005] Furthermore, the main switch frame also includes angle aluminum and conductive base. The angle aluminum consists of two parallel pieces. The first end of the angle aluminum is fixedly connected to the terminal block, and the second end of the angle aluminum is fixedly connected to the conductive base.

[0006] Furthermore, the flexible connector includes a fixing clip, a guide plate, a steel sheet, and an aluminum sheet. There are two fixing clips, two steel sheets, and several aluminum sheets disposed between the two steel sheets. Two guide plates are fixed on the fixing clip. The ends of the aluminum sheets and steel sheets extend into the space between the two guide plates on the corresponding side fixing clip and are fixedly connected to the guide plates.

[0007] Furthermore, a spring sleeve is provided between the conductive tube base and the main switch frame. The spring sleeve extends under external tension and returns to its original shape after the external tension is removed. The first end of the spring sleeve is hinged to the main switch frame, and the second end of the spring sleeve is hinged to the conductive tube base.

[0008] Furthermore, the spring sleeve includes a sleeve body, a spring rod, a spring mounting plate, and a first spring. The first end of the sleeve body is hinged to the main gate frame. The first end of the spring rod is located inside the sleeve body. The second end of the spring rod is hinged to the conductive tube base. The spring mounting plate is fixed to the first end of the spring rod. The first spring is located between the spring mounting plate and the second end of the sleeve body.

[0009] Furthermore, the inner side of the first spring has a second spring, the first end of the second spring is in contact with the spring mounting plate, and the second end of the second spring is in contact with the second end of the sleeve body.

[0010] Furthermore, the inner wall of the conductive tube base has watch strap fingers, the first end of the conductive tube has a conductive cylinder, the conductive cylinder extends into the inner side of the conductive tube base and is rotatably connected to the conductive tube base, and the conductive cylinder is in contact with the inner wall of the watch strap fingers.

[0011] Furthermore, the crank arm includes a first connector, a second connector, and a connecting plate. The first connector is fixed to a first end of the connecting plate, the second connector is fixed to a second end of the connecting plate, a rotating shaft is fixed to the first connector, a crank arm bracket is fixed to the main gate frame, and the rotating shaft is rotatably connected to the crank arm bracket. The connecting plate is in an inclined state, and the first connector is lower than the second connector.

[0012] Furthermore, the pull rod includes a fork and a telescopic connecting frame, the first end of the connecting frame is hinged to the second end of the crank arm, the second end of the connecting frame is fixedly connected to the first end of the fork, and the second end of the fork is hinged to the first end of the conductive tube.

[0013] Furthermore, the connecting frame includes a U-shaped frame, a screw, and an adjusting nut. The U-shaped frame is hinged to the second connecting head, the screw passes through the U-shaped frame and is rotatably connected to it, the adjusting nut is fixedly connected to the first end of the fork, and the adjusting nut is threadedly connected to the screw.

[0014] Furthermore, the connecting plate includes a straight plate and a bent plate, wherein the straight plate passes through the bent plate and the two are arranged perpendicularly.

[0015] Furthermore, the conductive base has a transition bracket, which is fixedly connected to the supporting insulator, and the transition bracket has a grounding stationary contact.

[0016] The beneficial effects of this invention are as follows: the combined rotation of the conductive tube, the conductive tube base, and the main switch frame, along with the linkage of the crank arm and the pull rod, balances the insulation distance and space occupation; the conductive tube's rotation through the conductive tube base disperses the bending moment, and the inclined design of the crank arm and the optimized force distribution of the pull rod improve stability; the close contact between the conductive cylinder and the inner wall of the conductive tube base with the surface-mounted contact fingers ensures the reliability of the dynamic electrical connection when the conductive components move relative to each other, reducing contact failures; compared with the existing main switch structure, the insulation distance is greater, the space occupation is smaller, the movement is smoother, and the service life is longer. Attached Figure Description

[0017] Figure 1 This is a three-dimensional diagram of the present invention; Figure 2 This is one of the three-dimensional views of the components on the main gate frame of the present invention; Figure 3 This is the second three-dimensional view of the components on the main gate frame of the present invention; Figure 4 This is a top view of the components on the main gate frame of the present invention; Figure 5 This is a front view of the components on the main gate frame of the present invention; Figure 6 This is a cross-sectional assembly drawing of the conductive base and the conductive tube base; Figure 7 This is a cross-sectional view of the spring sleeve; Figure 8 for Figure 4 Enlarged view of section A in the image; Figure 9 This is a 3D diagram of the conductive tube; Figure 10 This is a three-dimensional spatial diagram showing the positions of the buffer block and the base ear plate. Figure 11 This is the front view of the flexible connector; Figure 12 This is a 3D diagram of the crank arm; Figure 13 This is the front view of the crank arm; Figure 14 This is a 3D diagram of the tie rod; In the diagram: 1. Main switch frame; 11. Terminal block; 12. Angle aluminum; 13. Conductive base; 131. Limiting plate; 132. Buffer block; 2. Crank arm bracket; 21. Crank arm support cylinder; 3. Crank arm; 31. Connecting plate; 311. Straight plate; 312. Bending plate; 32. First connector; 33. Second connector; 34. Rotating shaft; 4. Pull rod; 41. Side rod; 42. Connecting block; 43. Connecting frame; 431. U-shaped frame; 432. Screw; 433. Positioning nut; 434. Adjusting nut; 5. Conductive tube; 51. Conductive tube ear plate; 52. Contact plate; 53. Arc-starting ball; 531. Ball seat; 54. First equalizing ring; 55. Contact plate clamp. 551 Slot, 552 Bolt, 56 Conductive Cylinder, 6 Conductive Pipe Base, 61 Base Ear Plate, 62 Skeleton Oil Seal, 63 Rolling Bearing, 64 Watch Strap Finger, 65 Composite Bushing, 7 Spring Sleeve, 71 Sleeve Body, 72 Pressure Plate, 73 Spring Pressure Rod, 74 Spring Mounting Plate, 75 First Spring, 76 Second Spring, 8 Sleeve Mounting Plate, 9 Flange, 10 Second Equalizing Ring, 14 Flexible Connector, 141 Fixing Clip, 142 Steel Sheet, 143 Aluminum Sheet, 144 Guide Plate, 15 Grounding Static Contact, 16 Rod, 17 Transition Bracket, 171 Transition Flange, 172 Transition Plate. Detailed Implementation

[0018] like Figures 1 to 14 As shown, the present invention includes a main switch frame 1, a crank arm bracket 2, a crank arm 3, a pull rod 4, a conductive tube 5, a conductive tube base 6, a spring sleeve 7, a sleeve mounting plate 8, a flexible connector 14, and a grounding stationary contact 15. The structure and working principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] like Figure 2 , Figure 5 As shown, the main switch frame 1 includes a terminal block 11, angle aluminum brackets 12, and a conductive base 13. The angle aluminum brackets 12 are two parallel brackets. The terminal block 11 is located between the first ends of the two angle aluminum brackets 12, and the terminal block 11 is fixedly connected to the angle aluminum brackets 12 by bolts. The conductive base 13 is located between the second ends of the two angle aluminum brackets 12, and the conductive base 13 is also fixedly connected to the angle aluminum brackets 12 by bolts. The main switch frame 1 is the basic structure of the main switch, used for installing and supporting other components. The main switch frame 1 is directly installed on the insulator of the disconnecting switch, thereby realizing the assembly of the main switch.

[0020] like Figure 1 , Figure 3 As shown, a transition bracket 17 is fixed to the bottom of the conductive base 13. The transition bracket 17 is used for fixed connection with the insulator of the disconnecting switch. The transition bracket 17 includes a transition flange 171 and a transition plate 172. The first end of the transition plate 172 is fixedly connected to the top of the transition flange 171, and the first end of the transition plate 172 is fixedly connected to the bottom of the conductive base 13. A grounding stationary contact 15 is fixed to the second end of the transition plate 172.

[0021] like Figure 2 As shown, a crank arm bracket 2 and a sleeve mounting plate 8 are arranged vertically between the first ends of the two angle aluminum members 12. The crank arm bracket 2 is rectangular in shape. The first end of the crank arm bracket 2 overlaps the top surface of the first angle aluminum member 12, and the second end of the crank arm bracket 2 overlaps the top surface of the second angle aluminum member 12. The crank arm bracket 2 and the angle aluminum members 12 are fixedly connected by bolts. The crank arm bracket 2 is essentially a metal plate. A cylindrical crank arm support tube 21 is fixed to the top of the crank arm bracket 2. The crank arm support tube 21 is perpendicular to the crank arm bracket 2. Reinforcing ribs are welded between the side wall of the crank arm support tube 21 and the top surface of the crank arm bracket 2 to ensure the stability of the connection between the crank arm bracket 2 and the crank arm support tube 21. The function of the crank arm bracket 2 is to assemble the crank arm 3.

[0022] like Figure 2 As shown, the sleeve mounting plate 8 is shaped like a "]", and is located between the two angle aluminum members 12 and fixedly connected to them with bolts. The sleeve mounting plate 8 serves three purposes: first, it enhances the stability of the connection between the two angle aluminum members 12; second, it provides auxiliary support for the crank arm 3; and third, it is used to install the spring sleeve 7.

[0023] like Figure 2 , Figure 12 and Figure 13 As shown, the crank arm 3 includes a connecting plate 31, a first connecting head 32, a second connecting head 33, and a rotating shaft 34. The first connecting head 32 and the second connecting head 33 are fixedly connected by the connecting plate 31, making the entire crank arm 3 a single unit. The connecting plate 31 includes a straight plate 311 and a bent plate 312, with the straight plate 311 passing through the bent plate 312 and the two being perpendicular to each other. The first ends of the straight plate 311 and the bent plate 312 are fixedly connected to the first connecting head 32, and the second ends of the straight plate 311 and the bent plate 312 are fixedly connected to the second connecting head 33. The setting of the straight plate 311 is equivalent to adding reinforcing ribs between the bent plate 312 and the first connecting head 32, and between the bent plate 312 and the second connecting head 33. The structure of the entire connecting plate 31 greatly increases its strength against torque. In use, the two connecting heads are positioned one above the other, with the first connecting head 32 lower and the second connecting head 33 higher, thus placing the connecting plate 31 in an inclined state. A rotating shaft 34 is fixed to the bottom of the first connector 32. The upper end of the rotating shaft 34 extends into the crank arm support cylinder 21, and the rotating shaft 34 is rotatably connected to the crank arm support cylinder 21, thereby realizing the rotatable connection between the entire crank arm 3 and the crank arm bracket 2. The lower end of the rotating shaft 34 extends downward from top to bottom through the crank arm bracket 2 and the sleeve mounting plate 8, as shown below. Figure 1 and Figure 3As shown, a flange 9 is fixed to the lower end of the rotating shaft 34. The flange 9 is used to connect with the output shaft of the drive insulator or operating mechanism of the disconnecting switch. The rotational motion of the output shaft of the drive insulator or operating mechanism is transmitted to the rotating shaft 34 through the flange 9, so that the crank arm 3 rotates.

[0024] like Figure 1 , Figure 9 As shown, the conductive tube 5 has a cylindrical structure. A conductive cylinder 56 is welded to the first end of the conductive tube 5. The conductive cylinder 56 is coaxially arranged with the conductive tube 5, and its diameter is smaller than that of the conductive tube 5. A portion of the conductive cylinder 56 extends into the conductive tube 5, and the remaining portion is used for assembly with the conductive tube base 6. The outer wall of the first end of the conductive tube 5 has a conductive tube ear plate 51. The second end of the conductive tube 5 is fixed with a first equalizing ring 54 and a contact plate clamp 55. The function of the first equalizing ring 54 is to prevent discharge. The contact plate clamp 55 has a cylindrical structure. The first end of the contact plate clamp 55 extends into the conductive tube 5 and is welded and fixed to the conductive tube 5. The second end of the contact plate clamp 55 has a slot 551. A contact plate 52 is inserted into the slot 551, and the width of the contact plate 52 is larger than the diameter of the contact plate clamp 55. Both ends of the contact plate 52 extend out of the slot 551 in the width direction. A bolt 552 is installed on the contact plate clamp 55, passing through the contact plate 52 and fixing the contact plate 52 to the contact plate clamp 55 together. An arc-inducing ball 53 is installed at the second end of the conductive tube 5. The arc-inducing ball 53 has a T-shaped ball seat 531, which is essentially a combination of a metal plate and a metal rod. The metal plate and metal rod are perpendicularly arranged and fixedly connected. The metal plate part of the ball seat 531 is fixedly connected to the second end of the conductive tube 5 by bolts, and the metal rod part of the ball seat 53 is fixedly connected to the arc-inducing ball 53, thus indirectly contacting the contact plate 52. The function of the contact plate 52 is to contact the contact finger on the disconnecting switch, thereby achieving closing. A conductive tube ear plate 51 is fixed to the first end of the conductive tube 5. The function of the conductive tube ear plate 51 is to be hinged to the pull rod 4, thereby realizing the assembly of the conductive tube 5 and the pull rod 4.

[0025] like Figure 2 and Figure 4 As shown, the pull rod 4 includes a fork and a connecting bracket 43, as... Figure 14 As shown, the fork includes two side bars 41 and connecting blocks 42. The side bars 41 are symmetrically arranged. Multiple connecting blocks 42 are arranged between the two side bars 41, with the length of the connecting blocks 42 gradually increasing along the arrangement direction. The ends of the connecting blocks 42 are welded and fixed to the corresponding side bars 41, thus forming a tapered shape for the entire fork. The larger end of the fork is used for hinged connection with the conductive tube lug 51, such as... Figure 4 , Figure 8As shown, the lower end of the fork is used to install the connecting frame 43, which includes a U-shaped frame 431, a screw 432, a positioning nut 433, and an adjusting nut 434. The second connecting head 33 of the crank arm 3 extends into the U-shaped frame 431 and is hinged to it. The first end of the screw 432, which has a nut, is rotatably connected to the U-shaped frame 431. To limit the movement of the screw 432, a positioning nut 433 is provided at the first end of the screw 432. The middle part of the U-shaped frame 431 is sandwiched between the positioning nut 433 and the nut of the screw 432. The second end of the screw 432 is threadedly fitted with an adjusting nut 434, such as... Figure 14 As shown, the adjusting nut 434 is located between the two side rods 41 and at the small end of the fork. The adjusting nut 434 is welded and fixed to the side rods 41. When the screw 432 is rotated, the relative position of the screw 432 and the adjusting nut 434 can be adjusted, thereby adjusting the distance between the U-shaped frame 431 and the fork. The function of the connecting frame 43 is to adjust the distance between the pull rod 4 and the second connecting head 33 of the crank arm 3 to meet assembly requirements. When the crank arm 3 rotates in the horizontal plane, it pushes and pulls the conductive tube 5 through the pull rod 4, causing the conductive tube 5 to rotate relative to the conductive base 13. When the crank arm 3 rotates clockwise, it pushes the conductive tube 5 through the pull rod 4, causing the conductive tube 5 to fall; when the crank arm 3 rotates counterclockwise, it pulls the conductive tube 5 upward through the pull rod 4.

[0026] like Figure 6 As shown, the conductive tube base 6 has a cylindrical structure. Both ends of the conductive tube base 6 have internal skeleton oil seals 62. The first end of the conductive tube base 6 has an internal rolling bearing 63, with the outer ring of the rolling bearing 63 fixedly connected to the inner wall of the conductive tube base 6. The second end of the conductive tube base 6 has two watch strap fingers 64 and a composite bushing 65. The watch strap fingers 64 are rotatably connected to the inner wall of the conductive tube base 6, and the composite bushing 65 is also rotatably connected to the inner wall of the conductive tube base 6, located between the watch strap fingers 64 and the skeleton oil seals 62 at the second end of the conductive tube base 6. The conductive tube 56 at the first end of the conductive tube 5 extends into the conductive tube base 6 and is fixedly connected to the inner ring of the rolling bearing 63. The outer wall of the conductive tube 56 contacts the watch strap fingers 64. Furthermore, the conductive cylinder 56 is electrically connected to the conductive tube base 6 via the watch strap contact finger 64, and the conductive cylinder 56 is rotatably connected to the conductive tube 5 via the rolling bearing 63. The outer wall of the conductive tube base 6 has a base ear plate 61, which is rotatably connected to the conductive base 13 via a hinge shaft 66. The conductive tube 5 is rotatably connected to the conductive tube base 6, and the conductive tube base 6 is rotatably connected to the conductive base 13, thus the conductive tube 5 can rotate around its own axis and swing relative to the conductive base 13.

[0027] To achieve an electrical connection between the terminal block 11 and the conductive tube 5, such as Figure 4As shown, a flexible connector 14 is provided between the main switch frame 1 and the conductive tube 5. The first end of the flexible connector 14 is fixedly connected to the angle aluminum 12 by bolts, and the second end of the flexible connector 14 is fixedly connected to the first end of the conductive tube base 6 by bolts. The flexible connector 14 has extensibility and elasticity. The terminal block 11 is fixed in contact with the angle aluminum 12, the angle aluminum 12 is fixed in contact with the flexible connector 14, and the flexible connector 14 is fixed in contact with the conductive tube base 6. The conductive tube base 6 is electrically connected to the conductive tube 5, thereby realizing the electrical connection between the conductive tube 5 and the terminal block 11. There are two flexible connectors 14, and the two flexible connectors 14 are symmetrically arranged. Specifically, as shown... Figure 11 As shown, the flexible connector 14 includes a fixing clip 141, a steel sheet 142, and an aluminum sheet 143. There are two fixing clips 141, and guide plates 144 are welded and fixed to each fixing clip 141. Each fixing clip 141 has two guide plates 144, which are symmetrically arranged on the fixing clip 141. There are two steel sheets 142 and several aluminum sheets 143, located between the two steel sheets 142. The ends of the steel sheets 142 and aluminum sheets 143 extend into the space between the two guide plates 144 on the corresponding side fixing clip 141 and are welded and fixed to the guide plates 144. Thus, the entire flexible connector 14 becomes a single unit and has extensibility and elasticity. The fixing clip 141 at the first end of the flexible connector 14 is fixedly connected to the angle aluminum 12 by bolts, and the fixing clip 141 at the second end of the flexible connector 14 is fixedly connected to the conductive tube base 6 by bolts. The angle aluminum 12 is fixed, while the conductive tube base 6 rotates with the conductive tube 5 relative to the conductive base 13. The distance between the conductive tube base 6 and the angle aluminum 12 changes, and the structure of the flexible connector 14 can adapt to this change.

[0028] When the conductive tube base 6 rotates relative to the conductive base 13, in order to limit the position of the conductive tube base 6, such as... Figure 3 As shown, a limiting plate 131 is fixed on the upper part of the conductive base 13, and two buffer blocks 132 are symmetrically arranged on the limiting plate 131. The buffer blocks 132 are rubber parts. Figure 10 As shown, the base ear plate 61 has two sides, and each side corresponds to one of the two buffer blocks 132. During the rotation of the conductive tube base 6 relative to the conductive base 13, when the buffer block 132 contacts the corresponding side of the base ear plate 61, it limits the rotation of the conductive tube base 6, that is, it restricts the rotation range of the conductive tube base 6.

[0029] To ensure a smooth descent of the conductive tube 5, a spring sleeve 7 is provided between the conductive tube base 5 and the sleeve mounting plate 8. For example... Figure 7As shown, the spring sleeve 7 includes a sleeve body 71, a pressure plate 72, a spring rod 73, a first spring 75, and a second spring 76. The sleeve body 71 has a cylindrical structure, and pressure plates 72 are fixed inside both ends of the sleeve body 71. The pressure plate 72 at the first end of the sleeve body 71 has an ear plate, and the pressure plate 72 at the second end of the sleeve body 71 has a through hole. The first end of the spring rod 73 has a spring mounting plate 74 located inside the sleeve body 71. The second end of the spring rod 73 extends out of the sleeve body 71. The first spring 75 and the second spring 76 are positioned between the spring mounting plate 74 and the pressure plate 72 at the second end of the sleeve body 71. The first spring 75 and the second spring 76 are positioned inside and outside each other, and in their natural state, they have the same length. The second spring 76 is located inside the first spring 75. Under the action of the first spring 75 and the second spring 76, the spring rod 73 extends to its maximum length inside the sleeve body 71. Under the coordinated action of the first spring 75 and the second spring 76, the spring rod 73 smoothly moves out of the sleeve body 71. The nested arrangement of the second spring 76 and the first spring 75 strengthens the elastic force. When the crank arm 3 rotates in the opposite direction, causing the conductive tube 5 to rise, the first spring 75 and the second spring 76 exert a strong pulling force on the spring mounting plate 74, making the rising process of the conductive tube 5 relatively smooth. The function of the spring sleeve 7 is to provide tension and elasticity for the rising process of the conductive tube 5, ensuring the smoothness of the rising process of the conductive tube 5.

[0030] Two symmetrically arranged second equalizing rings 10 are provided around the periphery of the main switch frame 1. The second equalizing rings 10 are designed to prevent discharge. The entire main switch frame 1 is located between the two second equalizing rings 10. Figure 3 As shown, the second equalizing ring 10 is fixedly connected to the angle aluminum 12 via the rod 16.

[0031] The working principle of this invention is described below: (1) Installation: During installation, the flange 9 is fixedly connected to the output shaft or operating insulator of the operating mechanism of the disconnector, and the transition flange 171 of the transition bracket 17 is fixedly connected to the support insulator of the disconnector.

[0032] (2) Closing: Before closing, the conductive tube 5 is in a vertical position; when closing, the flange 9 is rotated clockwise by the output shaft of the operating mechanism or the operating insulator. At this time, the crank arm 3 rotates clockwise, and the conductive tube 5 is pushed downward by the pull rod 4, i.e., it falls; until the contact plate 52 on the conductive tube 5 extends into the stationary contact of the disconnecting switch and contacts the contact finger to achieve closing. At the same time, the relative position and angle between the conductive tube base 6 and the angle aluminum 12 change, and the flexible connector 14 adapts to the swinging needs of the conductive tube base 6 by telescoping and deforming. During the rotation of the conductive tube base 6, the spring pull rod 73 in the spring sleeve 7 swings with the conductive tube base 6 and moves outward relative to the sleeve body 71, so that the conductive tube 5 falls smoothly.

[0033] (3) Opening: When opening, the flange 9 is rotated counterclockwise by the output shaft of the operating mechanism or the operating insulator. At this time, the crank arm 3 rotates counterclockwise, and the conductive tube 5 is pulled upward by the pull rod 4, i.e., it rises. At this time, the contact plate 52 on the conductive tube 5 gradually separates from the contact finger in the stationary contact of the disconnecting switch until the conductive tube returns to the vertical state. At the same time, the relative position and angle between the conductive tube base 6 and the angle aluminum 12 change, and the flexible connector 14 adapts to the swinging needs of the conductive tube base 6 by telescoping and deforming. During the rotation of the conductive tube base 6, the spring pull rod 73 in the spring sleeve 7 swings with the conductive tube base 6 and moves inward relative to the sleeve body 71, so that the conductive tube 5 rises smoothly.

[0034] The advantages of the main disconnect switch of this invention are as follows: the combined rotation of the conductive tube 5, the conductive tube base 6, and the main disconnect frame 1, in conjunction with the linkage of the crank arm 3 and the pull rod 4, balances the insulation distance and space occupation; the double spring design of the spring sleeve 7 provides buffer for the swing of the conductive tube 5, the rotation of the conductive tube 5 through the conductive tube base 6 disperses the bending moment, and the inclined design of the crank arm 3 and the pull rod 4 optimize the force distribution and improve stability; the close contact between the conductive tube 56 and the inner wall of the conductive tube base 6 with the surface-mounted contact finger 64 ensures the reliability of the dynamic electrical connection when the conductive components move relative to each other, reducing contact failures; compared with the existing main disconnect structure, the insulation distance is larger, the space occupation is smaller, the movement is smoother, and the service life is longer.

Claims

1. A disconnector main switch, comprising a main switch frame, a crank arm bracket, a crank arm, a pull rod, and a conductive tube, wherein the first end of the main switch frame has a terminal block, characterized in that, It also includes a flexible connector. The first end of the crank arm is rotatably connected to the main switch frame. The first end of the conductive tube is rotatably mounted with a conductive tube base. The conductive tube base is rotatably connected to the second end of the main switch frame. The first end of the pull rod is hinged to the second end of the crank arm. The second end of the pull rod is hinged to the first end of the conductive tube. The second end of the conductive tube has a contact plate for contacting the stationary contact of the disconnecting switch to achieve closing. The first end of the flexible connector is fixedly connected to the main switch frame. The second end of the flexible connector is fixedly connected to the conductive tube base. The electrical connection between the terminal block and the conductive tube base is achieved through the flexible connector. A spring sleeve is provided between the conductive tube base and the main switch frame. The spring sleeve extends under external tension and returns to its original shape after the external tension is removed. The first end of the spring sleeve is hinged to the main switch frame, and the second end of the spring sleeve is hinged to the conductive tube base.

2. The main disconnector switch according to claim 1, characterized in that, The main switch frame also includes angle aluminum and conductive base. The angle aluminum consists of two parallel pieces. The first end of the angle aluminum is fixedly connected to the terminal block, and the second end of the angle aluminum is fixedly connected to the conductive base.

3. The main disconnector switch according to claim 1, characterized in that, The flexible connector includes a fixing clip, a guide plate, a steel sheet, and an aluminum sheet. There are two fixing clips, two steel sheets, and several aluminum sheets disposed between the two steel sheets. Two guide plates are fixed on the fixing clip. The ends of the aluminum sheets and steel sheets extend into the space between the two guide plates on the corresponding side fixing clip and are fixedly connected to the guide plates.

4. The main disconnector switch according to claim 1, characterized in that, The spring sleeve includes a sleeve body, a spring rod, a spring mounting plate, and a first spring. The first end of the sleeve body is hinged to the main gate frame. The first end of the spring rod is located inside the sleeve body. The second end of the spring rod is hinged to the conductive tube base. The spring mounting plate is fixed to the first end of the spring rod. The first spring is located between the spring mounting plate and the second end of the sleeve body.

5. The main disconnector switch according to claim 4, characterized in that, The first spring has a second spring on its inner side, the first end of the second spring is in contact with the spring mounting plate, and the second end of the second spring is in contact with the second end of the sleeve body.

6. The main disconnector switch according to claim 1, characterized in that, The inner wall of the conductive tube base has watch strap fingers, and the first end of the conductive tube has a conductive cylinder. The conductive cylinder extends into the inner side of the conductive tube base and is rotatably connected to the conductive tube base, and the conductive cylinder is in contact with the inner wall of the watch strap fingers.

7. The main disconnector switch according to claim 1, characterized in that, The crank arm includes a first connector, a second connector, and a connecting plate. The first connector is fixed to the first end of the connecting plate, and the second connector is fixed to the second end of the connecting plate. A rotating shaft is fixed to the first connector. A crank arm bracket is fixed to the main switch frame. The rotating shaft is rotatably connected to the crank arm bracket. The connecting plate is inclined and the first connector is lower than the second connector.

8. The main disconnector switch according to claim 7, characterized in that, The pull rod includes a fork and a telescopic connecting frame. The first end of the connecting frame is hinged to the second end of the crank arm, the second end of the connecting frame is fixedly connected to the first end of the fork, and the second end of the fork is hinged to the first end of the conductive tube.

9. The main disconnector switch according to claim 8, characterized in that, The connecting frame includes a U-shaped frame, a screw, and an adjusting nut. The U-shaped frame is hinged to the second connecting head. The screw passes through the U-shaped frame and is rotatably connected to it. The adjusting nut is fixedly connected to the first end of the fork and is threadedly connected to the screw.

10. The main disconnector switch according to claim 7, characterized in that, The connecting plate includes a straight plate and a bent plate, wherein the straight plate passes through the bent plate and the two are arranged perpendicularly.

11. The main disconnector switch according to claim 2, characterized in that, The conductive base has a transition bracket, which is fixedly connected to the supporting insulator, and the transition bracket has a grounding stationary contact.

Images