An outdoor high voltage inverted AC isolating switch

Abstract

The present invention relates to an outdoor high-voltage inverted AC disconnector, comprising an isolating switch unit, wherein the isolating switch unit comprises three isolating switch bodies, the isolating switch body comprises a base, an insulator column, an inter-pole pull rod, a terminal seat, a contact side conductive arm, a contact finger side conductive arm, a contact, and a contact finger, wherein the contact side conductive arm and the contact finger side conductive arm swing under the pull of the inter-pole pull rod to realize the opening and closing of the contact and the contact finger; two adjacent isolating switch bodies are connected by an inter-phase pull rod to realize synchronous action, and a main knife pull rod arranged horizontally outward is also connected to an isolating switch body located on the outside; and an operating unit drives the isolating switch unit to act. The isolating switch of the present invention adopts an inverted isolating switch to cooperate with a substation, and can use the lower space of the transmission tower beam to install the isolating switch, while ensuring the normal operation of the isolating switch, which greatly reduces the height of the isolating switch after installation.

Description

Technical Field

[0001] The invention relates to the field of isolating switches, in particular to an outdoor high-voltage inverted AC isolating switch. Background Art

[0002] GW4-420D(W) outdoor high-voltage AC disconnector is a three-phase AC rated frequency of 50 / 60Hz and rated voltage of 400kV outdoor high-voltage power transmission equipment. It is used to disconnect or connect high-voltage lines under no-load conditions to convert high-voltage lines, change operating modes, and implement safe electrical isolation of high-voltage electrical equipment such as busbars and circuit breakers under maintenance.

[0003] At present, with the development of urban construction, urban land and farmland are becoming increasingly scarce. Saving the land occupied by substations can make site planning and general layout more flexible, and it plays a very significant role in site selection under the conditions of small sites and crowded outgoing line corridors. Therefore, how to reduce the area occupied by substations, make full use of limited land resources, and reasonably arrange the electrical general layout has become one of the important research topics of the power sector.

[0004] When designing the existing substation, the lines in the substation are distributed into two layers, upper and lower, taking into account the layout in the substation, convenient routing, and saving space. The connection between the upper and lower lines needs to be achieved through outdoor high-voltage AC disconnectors. In this process, the installation of outdoor high-voltage AC disconnectors is relatively troublesome. Since the outdoor high-voltage AC disconnectors are suitable for connecting the upper and lower lines, a certain safety distance needs to be left between the lower disconnectors and the upper lines. Therefore, there are certain requirements for the height of the outdoor high-voltage AC disconnectors. If they are installed by setting up another bracket, the floor area of ​​the entire substation will be increased. If the transmission tower in the original substation is used for installation, the general disconnectors are installed in a normal manner, and the disconnectors and the grounding poles of the transmission towers need to maintain a certain insulation safety distance, which leads to the height of the transmission towers needing to be increased, which is even more troublesome. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an outdoor high-voltage inverted AC isolating switch which is easy to install, reduces the area occupied by a transformer substation and can reduce the installation height.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an outdoor high-voltage flip-down AC disconnector, the innovation of which is that the outdoor high-voltage flip-down AC disconnector is flip-down mounted on a beam of a transmission tower, and the outdoor high-voltage flip-down AC disconnector includes

[0007] The isolating switch unit comprises three isolating switch bodies arranged in parallel, the isolating switch body comprises a base, an insulator column is connected to both sides of the bottom end surface of the base respectively, the two insulator columns are connected to each other on one side close to the base through an inter-pole pull rod, a wiring seat is connected to the bottom end of the insulator column, a contact-side conductive arm is connected to one of the wiring seats, a contact-finger-side conductive arm is connected to the other wiring seat, a contact is installed at the end of the contact-side conductive arm, and a contact finger is installed at the end of the contact-finger-side conductive arm, the contact-side conductive arm and the contact-finger-side conductive arm swing under the pulling of the inter-pole pull rod to realize the opening and closing of the contact and the contact finger;

[0008] Two adjacent isolating switch bodies are connected by an interphase pull rod to achieve synchronous action, and a main switch pull rod arranged horizontally outward is also connected to an isolating switch body located on the outside;

[0009] The operating unit drives the isolating switch unit to operate, and the operating unit includes an operating mechanism box. The upper end of the operating mechanism box is connected to the main knife pull rod through a vertically arranged connecting rod assembly, and drives the main knife pull rod to operate to realize the opening and closing of the three isolating switch bodies.

[0010] Furthermore, the cooperation between the inter-pole pull rod and the conductive arm on the contact side and the conductive arm on the contact finger side is as follows: the two insulator columns are respectively mounted on the base through the cooperation of a bearing seat, and the bearing seat and the base are movably connected through the cooperation of the bearing, the two bearing seats are respectively defined as the active side bearing seat and the passive side bearing seat, and the two sides of the inter-pole pull rod are respectively hinged to the active side bearing seat and the passive side bearing seat;

[0011] The synchronization between the two adjacent isolating switch bodies is as follows: an interphase tie rod joint is further provided on the active side bearing seat of each isolating switch body, and both sides of the interphase tie rod are respectively hinged to the interphase tie rod joints on the active side bearing seats of the two adjacent isolating switch bodies, thereby realizing the synchronous action of the two adjacent isolating switch bodies;

[0012] A main pull rod joint is also provided on the active side bearing seat of the isolating switch body connected to the main knife pull rod. The main knife pull rod and the main pull rod joint are hinged, and pull the active side bearing seat to rotate, thereby realizing the opening and closing of the contacts and contact fingers of all the isolating switch bodies.

[0013] Furthermore, the cooperation between the bearing seat and the base is as follows: a flange shaft is installed on the base, two sides of the flange shaft extend from two sides of the base respectively, and one side of the flange shaft is connected to the bearing seat, and the other side is connected to the auxiliary rotating assembly;

[0014] The flange shaft is composed of a flange inner shaft and a flange outer shaft which are coaxially arranged inside and outside, and the side of the flange shaft connected to the bearing seat is defined as the first side, and the side connected to the auxiliary rotating assembly is defined as the second side;

[0015] The connection between the flange shaft and the bearing seat is as follows: a through hole for accommodating the flange shaft to pass through is opened in the middle position of the bearing seat, the bearing seat is directly mounted on the outer side of the flange shaft, a first deep groove ball bearing is also arranged between the bearing seat and the flange shaft, the inner wall of the bearing seat is stepped, which is sequentially a first step section, a second step section and a third step section, and the diameters of the first step section and the third step section are larger than the diameter of the second step section, the outer wall of the flange outer shaft on the first side has a fourth step section that fits with the inner wall of the first step section and a fifth step section that fits with the inner wall of the second step section, the outer wall of the flange inner shaft on the first side has a sixth step section that cooperates with the inner wall of the third step section to form a cavity for accommodating the installation of the first deep groove ball bearing, and a first ring-shaped gasket is also arranged on the side of the bearing seat close to the base, and the first gasket is fixed to the base by bolts;

[0016] The auxiliary rotating assembly includes a second deep groove ball bearing, a thrust bearing, a shaft cover, a shaft sleeve, a bearing seat sealing plate, a bearing seat sealing cover and a base mounting plate. The flange inner shaft and the flange outer shaft are located at the second side and have a cavity for accommodating the installation of the second deep groove ball bearing and the thrust bearing. The outer wall of the flange inner shaft at the second side is stepped, and is sequentially a seventh step section and an eighth step section, and the seventh step section is located on the side close to the sixth step section. The diameter of the seventh step section is greater than the diameter of the eighth step section. The inner wall of the flange outer shaft at the second side is also stepped, and is sequentially a ninth step section and a tenth step section. The ninth step section cooperates with the seventh step section to form a cavity for accommodating the installation of the second deep groove ball bearing, and the tenth step section cooperates with the eighth step section to form a cavity for accommodating the installation of the thrust bearing.

[0017] One end portion of the flange inner shaft on the second side is fixedly connected to the shaft cover by bolts, and one end portion of the flange outer shaft on the second side is fixed to the bearing seat sealing cover by bolts. A shaft sleeve is also mounted on the outside of the flange outer shaft, and the shaft sleeve is fixed to the flange outer shaft by bolts. A ring-shaped second gasket is also provided on the side of the shaft sleeve close to the base, and the second gasket is fixed to the base by bolts. A base mounting plate covering the shaft sleeve is also provided on the outside of the shaft sleeve, and a bearing seat sealing plate is fixed to the end of the base mounting plate.

[0018] Furthermore, the connecting rod assembly includes a vertical connecting rod arranged vertically, on which a plurality of vertical connecting rod brackets and vertical connecting rod connecting clamps are arranged, and the top end of the vertical connecting rod is connected to the main knife pull rod through the main crank arm bearing seat.

[0019] Furthermore, the main crank arm bearing seat includes a main crank arm bearing seat body, a main crank arm shaft, a crank arm connecting shaft, a main pull rod joint and a switch opening and closing limit assembly;

[0020] The crank arm connecting shaft is vertically arranged on the main crank arm bearing seat body, and the upper and lower sides of the crank arm connecting shaft extend from the upper and lower sides of the main crank arm bearing seat body respectively. A bearing seat sleeve is also arranged between the crank arm connecting shaft and the main crank arm bearing seat body. The lower side of the crank arm connecting shaft is fixed to the vertical connecting rod through the cooperation of the connecting pin. The upper side of the crank arm connecting shaft is connected to the horizontally arranged main crank arm shaft, and drives the main crank arm shaft to swing. A main pull rod joint is also hinged on the main crank arm shaft, and the main pull rod joint is connected to the main knife pull rod.

[0021] The opening and closing limit assembly includes an opening and closing bracket and an opening limit bolt and a closing limit bolt installed on both sides of the opening and closing bracket. The opening and closing bracket is fixed on the main crank arm bearing seat body and is arranged beside the main crank arm shaft, and the opening limit bolt and the closing limit bolt are both arranged on the side of the opening and closing bracket adjacent to the main crank arm shaft.

[0022] Furthermore, a voltage grading ring is provided on the upper side of the terminal block, and the voltage grading ring surrounds the outer side of the insulator column.

[0023] Furthermore, a shielding cover is provided on one side of the contact finger on the conductive arm of the contact finger. There are four shielding covers in total, namely an upper shielding cover located on the upper and lower sides of the contact finger, a lower shielding cover, and side shielding covers located on the left and right sides of the contact finger. In the closed state, each shielding cover covers both the contact finger and the contact.

[0024] The advantages of the present invention are as follows: the isolating switch of the present invention adopts an inverted isolating switch to cooperate with the substation, can be installed using the original transmission tower in the substation, and can use the lower space of the transmission tower beam to install the isolating switch, while ensuring the normal operation of the isolating switch, greatly reducing the height of the isolating switch after installation.

[0025] For the coordination between the bearing seat and the base, a plurality of different step designs and the coordination between the first deep groove ball bearing, the second deep groove ball bearing and the thrust bearing are adopted, so that the bearing seat can rotate more smoothly and avoid undesirable phenomena such as jamming, which also provides an excellent foundation for the smooth opening and closing of the subsequent contacts and contact fingers, and avoids the phenomena of jamming or inadequate opening and closing.

[0026] The design of the main crank arm bearing seat adopts the cooperation of the main crank arm shaft, crank arm connecting shaft and other components to effectively convert the vertical rotation of the vertical connecting rod into horizontal movement, thereby providing a good transfer basis for the drive cooperation between the vertical connecting rod and the main knife pull rod; and the design of the opening and closing limit assembly, through the cooperation of the opening limit bolt and the closing limit bolt, achieves a hard limit on the opening and closing action of the main knife pull rod, thereby avoiding the phenomenon of over-limit opening and closing of the contact fingers.

[0027] As for the design of the shielding cover, a shielding cover is designed to cover the contact fingers and contacts in four directions: up, down, left, and right. This can shield the interference of external electrical signals on the contact fingers after closing the circuit, thereby better protecting the contacts and contact fingers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of an outdoor high-voltage inverted AC isolating switch of the present invention.

[0029] Figure 2 It is a front view of the outdoor high-voltage inverted AC disconnect switch of the present invention.

[0030] Figure 3 It is a schematic diagram of the isolating switch body in the present invention.

[0031] Figure 4 It is a schematic diagram of the cooperation between the bearing seat and the base in the present invention.

[0032] Figure 5 It is a schematic diagram from another angle showing the cooperation between the bearing seat and the base in the present invention.

[0033] Figure 6 It is a cross-sectional view of the cooperation between the bearing seat and the base in the present invention.

[0034] Figure 7 for Figure 6 A magnified schematic diagram of part A.

[0035] Figure 8 It is a schematic diagram of the main crank arm bearing seat in the present invention.

[0036] Fig. 9 It is a front view of the main crank arm bearing seat in the present invention.

[0037] Fig.10 It is a top view of the main crank arm bearing seat in the present invention. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0039] like Figure 1-Figure 10 The outdoor high-voltage inverted AC isolating switch is inverted on a beam of a transmission tower. The outdoor high-voltage inverted AC isolating switch includes

[0040] The isolating switch unit 1 includes three isolating switch bodies arranged in parallel, such as Figure 4 As shown in the schematic diagram, the isolating switch body includes a base 11, and an insulator column 12 is connected to both sides of the bottom end surface of the base 11, and the umbrella skirt structure of the insulator column 12 adopts a conical structure with a small top and a large bottom, so that rainwater can flow smoothly and avoid accumulation. The two insulator columns 12 are connected by an inter-pole pull rod 13 on the side close to the base 11. A terminal block 14 is connected to the bottom end of the insulator column 12, and a terminal board 15 is also connected to the bottom end of the terminal block 14. A grading ring 121 is also provided on the upper side of the terminal block 14, and the grading ring 121 surrounds the outside of the insulator column 12. The design of the grading ring 121 is used to improve the voltage distribution of the insulator column 12.

[0041] A contact-side conductive arm 16 is connected to one of the wiring seats 14, and a contact-finger-side conductive arm 17 is connected to the other wiring seat 14. A contact is installed at the end of the contact-side conductive arm 16, and a contact finger is installed at the end of the contact-finger-side conductive arm 17. The contact-side conductive arm 16 and the contact-finger-side conductive arm 17 swing under the pull of the inter-pole pull rod 13 to realize the opening and closing of the contacts and contact fingers.

[0042] Two adjacent isolating switch bodies are connected via an interphase pull rod 18 to achieve synchronous action, and a main switch pull rod 19 horizontally arranged outward is also connected to one of the isolating switch bodies located on the outside.

[0043] The cooperation between the interpole pull rod 13 and the conductive arm 16 on the contact side and the conductive arm 17 on the contact finger side is as follows: the two insulator columns 12 are respectively installed on the base 11 through the cooperation of a bearing seat 101, and the bearing seat 101 and the base 11 are movably connected through the cooperation of the bearing. The top of the insulator column 12 is fixedly connected to the bearing seat 101 through the cooperation of bolts and nuts, and rotates with the bearing seat 101, thereby realizing the swing of the conductive arm 16 on the contact side and the conductive arm 17 on the contact finger side. The two bearing seats 101 are respectively defined as the active side bearing seat and the passive side bearing seat, and the two sides of the interpole pull rod 13 are respectively hinged to the active side bearing seat and the passive side bearing seat.

[0044] The cooperation between the bearing seat 101 and the base 11 is as follows: Figure 7As can be seen from the schematic diagram shown, a flange shaft is installed on the base 11, and both sides of the flange shaft extend from both sides of the base 11 respectively, and one side of the flange shaft is connected to the bearing seat 101, and the other side of the flange shaft is connected to the auxiliary rotating assembly. A rain cover is also arranged between the bearing seat 101 and the base 11.

[0045] The flange shaft is composed of a flange inner shaft 102 and a flange outer shaft 103 which are coaxially arranged inside and outside. A through hole for inserting and moving the flange inner shaft 102 is opened in the middle of the flange outer shaft 103. The side where the flange shaft is connected to the bearing seat 101 is defined as the first side, and the side where the flange shaft is connected to the auxiliary rotating component is defined as the second side.

[0046] The connection between the flange shaft and the bearing seat 101 is as follows: a through hole for accommodating the flange shaft to pass through is opened in the middle position of the bearing seat 101, and the bearing seat 101 is directly mounted on the outer side of the flange shaft. A first deep groove ball bearing 104 is also arranged between the bearing seat 101 and the flange shaft. The inner wall of the bearing seat 101 is stepped, which is the first step section, the second step section and the third step section in sequence, and the diameters of the first step section and the third step section are larger than the diameter of the second step section. The first step section is located on the side close to the base 11, and the outer wall of the flange outer shaft 103 on the first side has a fourth step section that fits with the inner wall of the first step section. And a fifth step section that fits with the inner wall of the second step section. The outer wall of the inner shaft 102 on the first side of the flange has a sixth step section that cooperates with the inner wall of the third step section to form a cavity for installing the first deep groove ball bearing 104. A first annular pad 105 is also provided on the side of the bearing seat 101 close to the base 11. The first pad 105 is fixed to the base 11 by bolts and nuts. An annular notch is also provided on the outer wall of the bearing seat 101 close to the base 11 to accommodate the positioning and installation of the first pad 105, so as to realize the positioning and installation between the bearing seat 101 and the first pad 105.

[0047] The auxiliary rotating assembly includes a second deep groove ball bearing 106, a thrust bearing 107, a shaft cover 108, a shaft sleeve 109, a bearing seat cover plate 110, a bearing seat sealing cover 111 and a base mounting plate 112. The flange inner shaft 102 and the flange outer shaft 103 are located on the second side and have a cavity for installing the second deep groove ball bearing 106 and the thrust bearing 107. The outer wall of the flange inner shaft 102 at the second side is stepped, and is successively the seventh step section and the eighth step section, and the seventh step section is located on the side close to the sixth step section, and the diameter of the seventh step section is greater than the diameter of the eighth step section. The inner wall of the flange outer shaft 103 at the second side is also stepped, and is successively the ninth step section and the tenth step section. The ninth step section cooperates with the seventh step section to form a cavity for installing the second deep groove ball bearing 106, and the tenth step section cooperates with the eighth step section to form a cavity for installing the thrust bearing 107.

[0048] One end of the flange inner shaft 102 on the second side is fixedly connected to the shaft cover 108 by bolts, and the end of the shaft cover 108 fits with the end of the thrust bearing 107, so as to achieve the limited fixation of the thrust bearing 107. One end of the flange outer shaft 103 on the second side is fixed to the bearing seat sealing cover 111 by bolts, and the bearing seat sealing cover 111 is used to seal the end of the flange outer shaft 103 on the second side. A sleeve 109 is also mounted on the outside of the flange outer shaft 103. The sleeve 109 is fixed to the flange outer shaft 103 by bolts, and the sleeve 109 covers both the flange inner shaft 102 and the flange outer shaft 103 on the second side. A ring-shaped second gasket 113 is also arranged on the side of the sleeve 109 close to the base, and the second gasket 113 is mounted on the sleeve 109. At the outer wall of the outer circle, the second pad 113 is also fixed on the base 11 by the cooperation of bolts and nuts, and the second pad 113 and the first pad 105 are fixed to the base 11 by using the same set of bolts and nuts.

[0049] A base mounting plate 112 is provided on the outer side of the sleeve 109 to cover the sleeve 109, a through hole is provided in the middle of the base mounting plate 112 at the position of the sleeve 109 to avoid the sleeve 109, and a bearing seat sealing plate 110 is fixed at the end of the base mounting plate 112 to seal the through hole of the base mounting plate 112.

[0050] As for the cooperation between the bearing seat 101 and the base 11, through the design of different step sections of the bearing seat 101, the flange inner shaft 102 and the flange outer shaft 103, and the mutual cooperation of the first deep groove ball bearing 104, the second deep groove ball bearing 106 and the thrust bearing 107, it can not only ensure that the position of the bearing seat 101 after installation is limited to avoid the relative movement of the bearing seat 101 relative to the base 11, but also enable the bearing seat 101 to rotate more smoothly to avoid jamming and other adverse phenomena, thus providing an excellent foundation for the smooth opening and closing of the subsequent contacts and contact fingers, avoiding the phenomenon of jamming or inadequate opening and closing.

[0051] The synchronous coordination between two adjacent isolating switch bodies is as follows: a phase-to-phase tie rod joint is also provided on the active side bearing seat of each isolating switch body, and the two sides of the phase-to-phase tie rod 18 are respectively hinged to the phase-to-phase tie rod joints on the active side bearing seats of the two adjacent isolating switch bodies, thereby realizing the synchronous action of the two adjacent isolating switch bodies.

[0052] A main pull rod joint is also provided on the active side bearing seat of the isolating switch body connected to the main knife pull rod 19. The main knife pull rod 19 is hinged to the main pull rod joint, and pulls the active side bearing seat to rotate, thereby realizing the opening and closing of all contacts and contact fingers of the isolating switch body.

[0053] A shielding cover 171 is also provided on one side of the contact finger at the conductive arm 17 on the contact finger side. There are four shielding covers 171, namely, an upper shielding cover located on the upper and lower sides of the contact finger, a lower shielding cover, and side shielding covers located on the left and right sides of the contact finger. In the closed state, each shielding cover 171 cooperates with each other to cover both the contact finger and the contact head. For the design of the shielding cover 171, shielding covers covering the contact finger and the contact head are designed in the four directions of the upper, lower, left and right of the contact finger, so as to shield the interference of external electrical signals on the contact finger after the switch is closed, so as to better protect the contact head and the contact finger.

[0054] The operating unit 2 drives the isolating switch unit to operate, and the operating unit 2 includes an operating mechanism box 21. The upper end of the operating mechanism box 21 is connected to the main knife pull rod 19 through a vertically arranged connecting rod assembly, and drives the main knife pull rod 19 to operate to realize the opening and closing of the three isolating switch bodies. The vertical connecting rod 22 is driven by the operating mechanism box 21 to rotate.

[0055] The connecting rod assembly includes a vertical connecting rod 22, on which a plurality of vertical connecting rod brackets and vertical connecting rod connecting clamps are arranged. Each vertical connecting rod bracket and vertical connecting rod connecting clamp is sequentially distributed on the outer wall of the vertical connecting rod 22 from top to bottom, and the top end of the vertical connecting rod is connected to the main knife pull rod 19 through the main crank arm bearing seat 23. Through the cooperation between the vertical connecting rod bracket and the vertical connecting rod connecting clamp, since the length of the vertical connecting rod 22 is relatively long, the additional vertical connecting rod bracket and the vertical connecting rod connecting clamp play a stabilizing role for the vertical connecting rod 22, avoiding the vertical connecting rod 22 from shaking and other undesirable phenomena, which affects the stability of the subsequent transmission.

[0056] like Figure 8-Figure 10 As shown in the schematic diagram, the main crank arm bearing seat 23 includes a main crank arm bearing seat body 231, a main crank arm shaft 235, a crank arm connecting shaft 232, a main pull rod joint 236 and a switch opening and closing limit assembly.

[0057] The main crank arm bearing seat body 231 is a U-shaped structural plate formed by connecting a pair of horizontal plates and a vertical plate.

[0058] The crank arm connecting shaft 232 is vertically arranged on the main crank arm bearing seat body 231, and the upper and lower sides of the crank arm connecting shaft 232 extend from the upper and lower sides of the two horizontal plates of the main crank arm bearing seat body 231 respectively. A bearing seat sleeve 233 is also arranged between the crank arm connecting shaft 232 and the main crank arm bearing seat body 231, and a bearing is also arranged in the bearing seat sleeve 233, so as to realize the free rotation between the crank arm connecting shaft 232 and the main crank arm bearing seat body 231.

[0059] The lower side of the crank arm connecting shaft 232 is fixed to the vertical connecting rod 22 by the cooperation of the connecting pin 234. The upper side of the vertical connecting rod 22 is provided with a groove for inserting and installing the crank arm connecting shaft 232. After the lower side of the crank arm connecting shaft 232 is inserted into the groove of the vertical connecting rod 22, the connecting pin 234 passes through the vertical connecting rod 22 and the crank arm connecting shaft 232 in sequence to achieve relative fixation between the vertical connecting rod 22 and the crank arm connecting shaft 232, so that when the vertical connecting rod 22 rotates, the crank arm connecting shaft 232 can be driven to rotate synchronously.

[0060] The main crank arm shaft 235 is arranged above the main crank arm bearing seat body 231, and the upper side of the crank arm connecting shaft 232 is connected to the horizontally arranged main crank arm shaft 235, and drives the main crank arm shaft 235 to swing. A main pull rod joint 236 is also hinged on the main crank arm shaft 235, and the main pull rod joint 236 is connected to the main knife pull rod 19.

[0061] The opening and closing limit assembly includes an opening and closing bracket 237 and an opening limit bolt 238 and a closing limit bolt 239 installed on both sides of the opening and closing bracket 237. The opening and closing bracket 237 is fixed to the upper end surface of the main crank arm bearing seat body 231 by the cooperation of bolts and nuts, and the opening and closing bracket 237 is arranged beside the main crank arm shaft 235, and the opening limit bolt 238 and the closing limit bolt 239 are both arranged on the side of the opening and closing bracket 237 adjacent to the main crank arm shaft 235.

[0062] The design of the main crank arm bearing seat 23 adopts the cooperation of the main crank arm shaft 235, the crank arm connecting shaft 232 and other components, which can well convert the vertical rotation of the vertical connecting rod 22 into horizontal movement, thereby providing a good transfer basis for the drive cooperation between the vertical connecting rod 22 and the main knife pull rod 19; and the design of the opening and closing limit assembly is to achieve a hard limit on the swing of the main crank arm shaft 235 through the cooperation of the opening limit bolt 238 and the closing limit bolt 239, thereby achieving the purpose of hard limiting the opening and closing action of the main knife pull rod 19, avoiding the phenomenon of over-limit opening and closing of the contact fingers.

[0063] Working principle: When opening and closing the switch, the operating mechanism box 21 works to drive the vertical connecting rod 22 to rotate, and the rotation of the vertical connecting rod 22 will pull the main knife pull rod 19 to perform horizontal movement through the cooperation of the main crank arm bearing seat 23, and the movement of the main knife pull rod 19 will drive the active side bearing seat of the closest isolating pipe body to rotate, and the rotation of the active side bearing seat will pull the driven side bearing seat of the same isolating switch body to rotate synchronously through the cooperation of the inter-pole pull rod 13, and the rotation of the active side bearing seat and the driven side bearing seat will drive the two insulator columns 12 to rotate synchronously, and the corresponding contact finger side conductive arm 17 and contact side conductive arm 16 will also swing synchronously, thereby realizing the opening and closing of the contacts and contacts of the isolating switch body. In addition, the active side bearing seat connected to the main knife pull rod 19 will also pull the active side bearing seat of the adjacent isolating switch body to rotate synchronously through the cooperation of the phase-to-phase pull rod 18, and finally realize the synchronous opening and closing of the contacts and fingers of the three isolating switch bodies.

[0064] The outdoor high-voltage inverted AC disconnector of the present invention adopts an inverted design to cooperate with the substation through the cooperation of the inverted base 11 and the insulator column 12 and other components. The disconnector can be installed by utilizing the lower space of the original transmission tower beam in the substation, while ensuring the normal operation of the disconnector, thereby greatly reducing the height of the disconnector after installation.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An outdoor high-voltage inverted AC isolating switch, characterized in that: The outdoor high-voltage flip-down AC disconnector is flipped on a crossbeam of a transmission tower, the outdoor high-voltage flip-down AC disconnector comprises a disconnector unit, the disconnector unit comprises three disconnector bodies arranged in parallel, the disconnector body comprises a base, an insulator column is connected to both sides of the bottom end surface of the base respectively, the two insulator columns are connected to each other on one side close to the base through an inter-pole pull rod, a wiring seat is connected to the bottom end of the insulator column, a contact-side conductive arm is connected to one of the wiring seats, a contact-finger-side conductive arm is connected to the other wiring seat, a contact is installed at the end of the contact-side conductive arm, a contact finger is installed at the end of the contact-finger-side conductive arm, the contact-side conductive arm and the contact-finger-side conductive arm swing under the pull of the inter-pole pull rod to realize the opening and closing of the contacts and the contact fingers; Two adjacent isolating switch bodies are connected by an interphase pull rod to achieve synchronous action, and a main switch pull rod arranged horizontally outward is also connected to an isolating switch body located on the outside; An operating unit for driving the isolating switch unit to operate, the operating unit comprising an operating mechanism box, the upper end of which is connected to the main knife pull rod through a vertically arranged connecting rod assembly, and drives the main knife pull rod to operate, thereby realizing the opening and closing of the three isolating switch bodies; The cooperation between the inter-pole pull rod and the conductive arm on the contact side and the conductive arm on the contact finger side is as follows: the two insulator columns are respectively mounted on the base through the cooperation of a bearing seat, and the bearing seat and the base are movably connected through the cooperation of the bearing, the two bearing seats are respectively defined as the active side bearing seat and the passive side bearing seat, and the two sides of the inter-pole pull rod are respectively hinged with the active side bearing seat and the passive side bearing seat; The synchronization between the two adjacent isolating switch bodies is as follows: an interphase tie rod joint is further provided on the active side bearing seat of each isolating switch body, and both sides of the interphase tie rod are respectively hinged to the interphase tie rod joints on the active side bearing seats of the two adjacent isolating switch bodies, thereby realizing the synchronous action of the two adjacent isolating switch bodies; A main pull rod joint is also provided on the active side bearing seat of the isolating switch body connected to the main knife pull rod. The main knife pull rod and the main pull rod joint are hinged and pull the active side bearing seat to rotate, thereby realizing the opening and closing of all contacts and contact fingers of the isolating switch body. The cooperation between the bearing seat and the base is as follows: a flange shaft is installed on the base, two sides of the flange shaft extend from two sides of the base respectively, and one side of the flange shaft is connected to the bearing seat, and the other side is connected to the auxiliary rotating assembly; The flange shaft is composed of a flange inner shaft and a flange outer shaft which are coaxially arranged inside and outside, and the side of the flange shaft connected to the bearing seat is defined as the first side, and the side connected to the auxiliary rotating assembly is defined as the second side; The connection between the flange shaft and the bearing seat is as follows: a through hole for accommodating the flange shaft to pass through is opened in the middle position of the bearing seat, the bearing seat is directly mounted on the outer side of the flange shaft, a first deep groove ball bearing is also arranged between the bearing seat and the flange shaft, the inner wall of the bearing seat is stepped, which is sequentially a first step section, a second step section and a third step section, and the diameters of the first step section and the third step section are larger than the diameter of the second step section, the outer wall of the flange outer shaft on the first side has a fourth step section that fits with the inner wall of the first step section and a fifth step section that fits with the inner wall of the second step section, the outer wall of the flange inner shaft on the first side has a sixth step section that cooperates with the inner wall of the third step section to form a cavity for accommodating the installation of the first deep groove ball bearing, and a first ring-shaped gasket is also arranged on the side of the bearing seat close to the base, and the first gasket is fixed to the base by bolts; The auxiliary rotating assembly includes a second deep groove ball bearing, a thrust bearing, a shaft cover, a shaft sleeve, a bearing seat sealing plate, a bearing seat sealing cover and a base mounting plate. The flange inner shaft and the flange outer shaft are located at the second side and have a cavity for accommodating the installation of the second deep groove ball bearing and the thrust bearing. The outer wall of the flange inner shaft at the second side is stepped, and is sequentially a seventh step section and an eighth step section, and the seventh step section is located on the side close to the sixth step section. The diameter of the seventh step section is greater than the diameter of the eighth step section. The inner wall of the flange outer shaft at the second side is also stepped, and is sequentially a ninth step section and a tenth step section. The ninth step section cooperates with the seventh step section to form a cavity for accommodating the installation of the second deep groove ball bearing, and the tenth step section cooperates with the eighth step section to form a cavity for accommodating the installation of the thrust bearing. One end portion of the flange inner shaft on the second side is fixedly connected to the shaft cover by bolts, and one end portion of the flange outer shaft on the second side is fixed to the bearing seat sealing cover by bolts. A shaft sleeve is also mounted on the outside of the flange outer shaft, and the shaft sleeve is fixed to the flange outer shaft by bolts. A ring-shaped second gasket is also provided on the side of the shaft sleeve close to the base, and the second gasket is fixed to the base by bolts. A base mounting plate covering the shaft sleeve is also provided on the outside of the shaft sleeve, and a bearing seat sealing plate is fixed to the end of the base mounting plate.

2. The outdoor high-voltage flip-chip AC disconnect switch according to claim 1 is characterized in that: The connecting rod assembly includes a vertical connecting rod arranged vertically, on which a plurality of vertical connecting rod brackets and vertical connecting rod connecting clamps are arranged, and the top end of the vertical connecting rod is connected to the main knife pull rod through the main crank arm bearing seat.

3. The outdoor high-voltage inverted AC disconnector according to claim 2 is characterized in that: The main crank arm bearing seat comprises a main crank arm bearing seat body, a main crank arm shaft, a crank arm connecting shaft, a main pull rod joint and a switch opening and closing limit assembly; The crank arm connecting shaft is vertically arranged on the main crank arm bearing seat body, and the upper and lower sides of the crank arm connecting shaft extend from the upper and lower sides of the main crank arm bearing seat body respectively. A bearing seat sleeve is also arranged between the crank arm connecting shaft and the main crank arm bearing seat body. The lower side of the crank arm connecting shaft is fixed to the vertical connecting rod through the cooperation of the connecting pin. The upper side of the crank arm connecting shaft is connected to the horizontally arranged main crank arm shaft, and drives the main crank arm shaft to swing. A main pull rod joint is also hinged on the main crank arm shaft, and the main pull rod joint is connected to the main knife pull rod. The opening and closing limit assembly includes an opening and closing bracket and an opening limit bolt and a closing limit bolt installed on both sides of the opening and closing bracket. The opening and closing bracket is fixed on the main crank arm bearing seat body and is arranged beside the main crank arm shaft, and the opening limit bolt and the closing limit bolt are both arranged on the side of the opening and closing bracket adjacent to the main crank arm shaft.

4. The outdoor high-voltage inverted AC disconnector according to claim 1 is characterized in that: A voltage grading ring is also arranged on the upper side of the wiring seat, and the voltage grading ring surrounds the outer side of the insulator column.

5. The outdoor high-voltage flip-chip AC disconnector according to claim 1 is characterized in that: The conductive arm on the contact finger side is also provided with a shielding cover on one side of the contact finger. There are four shielding covers in total, namely an upper shielding cover located on the upper and lower sides of the contact finger, a lower shielding cover, and side shielding covers located on the left and right sides of the contact finger. In the closed state, each shielding cover covers both the contact finger and the contact.

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