An ultra-high voltage disconnector main knife lever protection device and disconnector

Abstract

A kind of extra-high voltage isolating switch main knife lever protection device, comprising: anti-rotation part, is set to the front end of auxiliary movable contact;Limiting mechanism has the guide groove allowing anti-rotation part to follow auxiliary movable contact horizontal rotation, and the stroke of guide groove is consistent with auxiliary movable contact horizontal rotation stroke, the caliber of guide groove is used to prevent anti-rotation part from overturning;Fixed support, set to the side where the main static contact of isolating switch is, for fixing limiting mechanism.The present application can realize the limitation of the movement track of auxiliary movable contact by anti-rotation part and limiting mechanism, prevent auxiliary movable contact from overturning before anti-rotation part completely passes through guide groove, and then realize the limitation of the movement track of the main knife lever of isolating switch, finally realize the effect of preventing the main knife lever from overturning in advance.Through fixed support, flexible installation of limiting mechanism can be realized, and at the same time, flexible disassembly of fixed support itself and limiting mechanism can also be realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of disconnectors, in particular to a UHV disconnector main pole protection device and a disconnector. BACKGROUND

[0002] With the development of power grid industry and power transmission engineering, some UHV three-column horizontal rotary turnover disconnectors with high parameter bus switching breaking capacity have been put into operation. The high parameter bus switching breaking capacity needs to increase a small vacuum circuit breaker on a main conductive loop of a UHV three-column horizontal rotary turnover disconnector, so that the small vacuum circuit breaker can be driven to close by the main pole of the UHV three-column horizontal rotary turnover disconnector. Since the closing of the UHV three-column horizontal rotary turnover disconnector is completed by two steps of horizontal rotary motion of the main pole and turnover of the main pole around its own axis, if the main pole starts to turn around the axis before the horizontal rotary motion of the main pole is completed (the two ends of the main pole are completely in the main static contact), the two ends of the main pole will be stuck in the outer port of the main static contact, resulting in closing failure. Under normal circumstances, after the horizontal rotary motion of the main pole is completed, the two ends of the main pole will be limited by resistance after colliding with the innermost limiting pad of the main static contact on both sides, and then the main pole turnover self-holding force spring in the main pole turnover transmission box will be compressed, and the two-step closing will be completed.

[0003] When the main pole of the UHV three-column horizontal rotary turnover disconnector with high parameter bus switching breaking capacity is horizontally rotated to be close to the main static contact, the auxiliary moving contact arranged at the front end of the main static contact needs to drive the small circuit breaker in the auxiliary loop to close first, and then the main moving contact at the front end of the main pole will enter the main static contact to perform turnover action. However, since the force required to drive the small circuit breaker to close may increase after the disconnector is used for a long time, at the same time, the turnover holding force of the main pole may decrease, the UHV three-column horizontal rotary turnover disconnector may be prematurely turned due to the increase of resistance or the decrease of the turnover holding force of the main pole when the small circuit breaker is driven to close, which will seriously affect the reliable operation of the power grid. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a UHV disconnector main pole protection device, which has a simple structure and solves the problem of premature turnover of the UHV three-column horizontal rotary turnover disconnector. The present application also proposes a disconnector.

[0005] According to the first aspect of the present application, the main knife lever protection device of the UHV disconnector has the following technical effects: the movement track of the auxiliary moving contact is limited by the anti-rotation part and the limiting mechanism, the auxiliary moving contact is prevented from being turned over before passing through the guide groove completely, the movement track of the main knife lever of the disconnector is limited, and the main knife lever is prevented from being turned over in advance. The limiting mechanism is installed flexibly by the fixing support, and the fixing support and the limiting mechanism can be disassembled flexibly.

[0006] According to the first aspect of the present application, the main knife lever protection device of the UHV disconnector has the following technical effects: the movement track of the auxiliary moving contact is limited by the anti-rotation part and the limiting mechanism, the auxiliary moving contact is prevented from being turned over before passing through the guide groove completely, the movement track of the main knife lever of the disconnector is limited, and the main knife lever is prevented from being turned over in advance. The limiting mechanism is installed flexibly by the fixing support, and the fixing support and the limiting mechanism can be disassembled flexibly.

[0007] According to some embodiments of the present application, the anti-rotation part has a plate structure.

[0008] According to some embodiments of the present application, the limiting mechanism has a channel steel or a U-shaped plate.

[0009] According to some embodiments of the present application, the limiting mechanism has an upper clamping plate and a lower clamping plate arranged on the upper side and the lower side respectively, and the upper clamping plate and the lower clamping plate are used to adjust the width of the guide groove.

[0010] According to some embodiments of the present application, the fixing support includes a mounting column fixed to the side where the main static contact is located, a connecting part with one end fixed to the mounting column, and a fixing part connected to the other end of the connecting part and used to fix the limiting mechanism.

[0011] According to some embodiments of the present application, the connecting part includes a clamping part, a connecting column, and a connecting seat connected in sequence, the clamping part is connected to the mounting column, and the connecting seat is used to mount the fixing part.

[0012] According to some embodiments of the present application, the mounting column is provided with an adjusting bolt, and the adjusting bolt is used to adjust the length of the mounting column.

[0013] According to some embodiments of the present application, the fixing part has a mechanical clamp jaw, and the mechanical clamp jaw is fixed to the connecting part.

[0014] The disconnecting switch according to the second aspect of the present application comprises: the UHV disconnecting switch main pole protection device; and a rotary insulator, a turnover transmission box and a main pole connected in sequence, the rotary insulator is used to drive the main pole to rotate horizontally through the turnover transmission box, the turnover transmission box is also used to rotate the main pole around its axis, a main movable contact is arranged at both ends of the main pole, an auxiliary movable contact is arranged at the front end of the main movable contact, a main stationary contact is used to control the on-off of a main power supply loop together with the main movable contact, and an auxiliary stationary contact is used to control the on-off of an auxiliary loop together with the auxiliary movable contact.

[0015] The disconnecting switch according to the second aspect of the present application comprises: the UHV disconnecting switch main pole protection device; and a rotary insulator, a turnover transmission box and a main pole connected in sequence, the rotary insulator is used to drive the main pole to rotate horizontally through the turnover transmission box, the turnover transmission box is also used to rotate the main pole around its axis, a main movable contact is arranged at both ends of the main pole, an auxiliary movable contact is arranged at the front end of the main movable contact, a main stationary contact is used to control the on-off of a main power supply loop together with the main movable contact, and an auxiliary stationary contact is used to control the on-off of an auxiliary loop together with the auxiliary movable contact.

[0016] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a front view of the disconnecting switch of the present application (only one side of the main pole is shown);

[0019] Figure 2 is Figure 1 is an enlarged schematic view of the partial position A in

[0020] Figure 3-1 is a schematic view of the auxiliary movable contact of the present application in the limiting mechanism;

[0021] Figure 3-2 is a schematic view of the main movable contact of the present application just moving to the main stationary contact;

[0022] Figure 3-3 is a schematic view of the main movable contact and the main stationary contact of the present application closing.

[0023] Reference Signs:

[0024] anti-rotation part 100,

[0025] limiting mechanism 200, upper clamping plate 210, lower clamping plate 220,

[0026] The fixed support 300, the mounting column 310, the adjusting bolt 311, the connecting component 320, the clamping portion 321, the connecting column 322, the connecting seat 323, the fixed component 330,

[0027] The rotating insulator 400,

[0028] The overturning transmission case 500,

[0029] The active contact 600,

[0030] The auxiliary active contact 700,

[0031] The main inactive contact 800,

[0032] The auxiliary inactive contact 900. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, if the first, second, third, fourth, and the like are described, they are only for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0035] In the description of the present application, unless otherwise explicitly limited, the words such as setting, connecting, and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0036] The following refers to Figures 1 to 3-3 The main knife lever protection device of the extra-high voltage disconnector according to the first aspect of the present application is described.

[0037] The main knife lever protection device of the extra-high voltage disconnector according to the first aspect of the present application comprises: an anti-rotation part 100, a limiting mechanism 200, and a fixed support 300. The anti-rotation part 100 is arranged at the front end of the auxiliary active contact 700. The limiting mechanism 200 has a guide groove allowing the anti-rotation part 100 to rotate horizontally with the auxiliary active contact 700, and the stroke of the guide groove is consistent with the horizontal rotation stroke of the auxiliary active contact 700. The caliber of the guide groove is used to prevent the anti-rotation part 100 from overturning. The fixed support 300 is arranged on the side where the main inactive contact 800 of the disconnector is located, and is used to fix the limiting mechanism 200.

[0038] Reference is made to Figures 1 to 3-3The anti-rotation part 100 has a guide groove in the limiting mechanism 200, when the anti-rotation part 100 does not overturn, the guide groove allows the anti-rotation part 100 to pass, and after the anti-rotation part 100 overturns, the anti-rotation part 100 cannot pass through the guide groove. When the disconnecting switch starts to close, the main knife lever drives the main movable contact 600 and the auxiliary movable contact 700 to move, and then drives the anti-rotation part 100 at the front end of the auxiliary movable contact 700 to move. When the anti-rotation part 100 moves to the limiting mechanism 200, the anti-rotation part 100 will pass through the guide groove, but the caliber width of the guide groove is limited, and only allows the anti-rotation part 100 to pass without overturning, so only when the anti-rotation part 100 moves out of the limiting mechanism 200, the anti-rotation part 100 can overturn, thereby limiting the rotation of the auxiliary contact, the main contact and the main knife lever, and achieving the purpose of resisting early overturning.

[0039] According to the UHV disconnecting switch main knife lever protection device provided by the embodiment of the application, the anti-rotation part 100 and the limiting mechanism 200 can limit the movement track of the auxiliary movable contact 700, prevent the auxiliary movable contact 700 from overturning before the anti-rotation part 100 completely passes through the guide groove, limit the movement track of the main knife lever of the disconnecting switch, and finally prevent the main knife lever from overturning in advance. The fixed support 300 can be flexibly installed on the limiting mechanism 200, and the fixed support 300 and the limiting mechanism 200 can also be flexibly disassembled.

[0040] In some embodiments of the application, with reference to Figure 2 The anti-rotation part 100 adopts a plate structure. The plate structure can make the width of the guide groove narrower, and because the plate structure itself is an elongated structure, the combination of the two can further reduce the possibility of the anti-rotation part 100 overturning when passing through the guide groove.

[0041] In some embodiments of the application, with reference to Figure 2 The limiting mechanism 200 adopts a channel steel or a U-shaped plate. The channel steel or the U-shaped plate structure can limit the anti-rotation part 100. The gap between the upper and lower sides of the channel steel or the U-shaped plate can be used as the guide groove. In theory, the higher the matching degree of the width of the guide groove and the thickness of the anti-rotation part 100, the better. However, considering the actual installation and corrosion problems in later use, the width of the guide groove is usually slightly wider than the thickness of the anti-rotation part 100, which can also ensure that the anti-rotation part 100 passes through the guide groove smoothly, and can prevent the anti-rotation part 100 from overturning in advance.

[0042] In some embodiments of the application, with reference to Figure 2The upper and lower sides of the limiting mechanism 200 are respectively provided with an upper clamping plate 210 and a lower clamping plate 220, and the upper clamping plate 210 and the lower clamping plate 220 are used for adjusting the caliber width of the guide groove. The upper clamping plate 210 and the lower clamping plate 220 can be connected to the upper and lower sides of the limiting mechanism 200 by welding. By adjusting the positions of the upper clamping plate 210 and the lower clamping plate 220 on the upper and lower sides of the limiting mechanism 200, the guide groove surrounded by the upper clamping plate 210 and the lower clamping plate 220 can be adjusted. In this way, the application range of the limiting mechanism 200 can be larger, and more models of disconnectors can be used.

[0043] In some embodiments of the present application, reference is made to Figure 2 The fixing support 300 comprises a mounting column 310, a connecting component 320 and a fixing component 330. The mounting column 310 is fixed to one side of the main static contact 800. One end of the connecting component 320 is fixed to the mounting column 310. The fixing component 330 is connected to the other end of the connecting component 320 and is used for fixing the limiting mechanism 200. Through the joint action of the mounting column 310 and the connecting component 320, the fixing component 330 can be arranged at a suitable position, and then the limiting mechanism 200 is fixed at a suitable position through the fixing component 330.

[0044] In some embodiments of the present application, reference is made to Figure 2 The connecting component 320 comprises a clamping part 321, a connecting column 322 and a connecting seat 323 connected in sequence. The clamping part 321 is connected to the mounting column 310. The connecting seat 323 is used for mounting the fixing component 330. Generally, in order to ensure the assembly of the clamping part 321 and the mounting column 310, a circular through hole matched with the mounting column 310 is arranged in the clamping part 321, and an opening is arranged on one side of the clamping part 321, so that the clamping part 321 can be tightly assembled with the mounting column 310. In addition, a bolt hole can be arranged on one side of the opening of the clamping part 321, so as to facilitate the subsequent locking of the clamping part 321 by using a bolt. The connecting seat 323 mainly provides a mounting base for the limiting mechanism 200. Generally, a through hole is arranged on the connecting seat 323, so as to facilitate the subsequent assembly of the limiting mechanism 200 and the connecting seat 323 by using a bolt or other components. The connecting column 322 is used for connecting the clamping part 321 and the connecting seat 323.

[0045] In some embodiments of the present application, the mounting column 310 is provided with an adjusting bolt 311; the adjusting bolt 311 is used to adjust the length of the mounting column 310. The adjusting bolt 311 is used to adjust the length of the mounting column 310. For different types of disconnectors, the installation environment of the main static contact 800 will be different, and even for the same type of disconnector, there will be some errors in the installation position, for example, the distance between the two side grading rings of the main static contact 800 will have some errors, and at the same time, the mounting column 310 itself will also have errors. Through the adjusting bolt 311, the problem of these small errors can be effectively solved.

[0046] In some embodiments of the present application, the fixing component 330 adopts a mechanical clamp jaw; the mechanical clamp jaw is fixed to the connecting component 320. The mechanical clamp jaw can make the limiting mechanism 200 and the fixing component 330 more stable and firm. In some embodiments, a screw rod will be connected to the rear of the fixing component 330, and through the screw rod, the assembly between the fixing component 330 and the connecting component 320 can be facilitated.

[0047] According to the disconnector of the second aspect of the embodiments of the present application, the disconnector comprises: an extra-high voltage disconnector main knife lever protection device, a rotating insulator 400, a turnover transmission box 500, a main knife lever, a main movable contact 600, an auxiliary movable contact 700, a main static contact 800, and an auxiliary static contact 900. The extra-high voltage disconnector main knife lever protection device is used to limit the turnover of the main knife lever; the rotating insulator 400 is used to drive the main knife lever to rotate horizontally through the turnover transmission box 500; the turnover transmission box 500 is also used to make the main knife lever rotate around its own axis; the main movable contact 600 is arranged at both ends of the main knife lever; the auxiliary movable contact 700 is arranged at the front end of the main movable contact 600; the main static contact 800 is used to control the on-off of the main power supply circuit together with the main movable contact 600; and the auxiliary static contact 900 is used to control the on-off of the auxiliary circuit together with the auxiliary movable contact 700.

[0048] Reference Figures 1 to 3-3 The rotation of the rotating insulator 400 will drive the turnover transmission box 500 to operate, and in turn drive the main knife lever to rotate horizontally. The main knife lever will not turn over in the process of horizontal rotation due to the holding force of the turnover transmission box 500. In the process of closing, the main knife lever will not turn over in advance due to the presence of the extra-high voltage disconnector main knife lever protection device. Therefore, the normal closing of the main movable contact 600 and the main static contact 800 can be ensured.

[0049] According to the disconnector of the embodiments of the present application, by adding the extra-high voltage disconnector main knife lever protection device, the function of preventing the main knife lever from turning over in advance can be realized. Through the turnover transmission box 500, the turning-over action of the main knife lever around the axis can be realized. In addition, through the rotating insulator 400, the device for providing external power can be more conveniently connected.

[0050] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present application are described in detail above in combination with the drawings, the present application is not limited to the above embodiments, and it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and the spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A UHV disconnector main shank protection device, characterized in that: include: An anti-rotation portion (100) is provided at the front end of the auxiliary moving contact (700); the anti-rotation portion (100) adopts a plate-shaped structure; A limiting mechanism (200) having a guide groove that allows the anti-rotation portion (100) to follow the horizontal rotation of the auxiliary moving contact (700), wherein the stroke of the guide groove is consistent with the horizontal rotation stroke of the auxiliary moving contact (700), and the diameter of the guide groove is used to prevent the anti-rotation portion (100) from turning over; A fixing bracket (300) is provided on a side where the main static contact (800) of the isolating switch is located, and is used to fix the limiting mechanism (200).

2. The UHV disconnector main shank protection device according to claim 1, characterized in that: The limiting mechanism (200) is made of channel steel or U-shaped plate.

3. The UHV disconnector main shank protection device according to claim 1, characterized in that: An upper clamping plate (210) and a lower clamping plate (220) are respectively provided on the upper and lower sides of the limiting mechanism (200), and the upper clamping plate (210) and the lower clamping plate (220) are used to adjust the caliber width of the guide groove.

4. The UHV disconnector main shank protection device according to claim 1, characterized in that: The fixing bracket (300) comprises: A mounting post (310) is fixed to the side where the main static contact (800) is located; a connecting component (320), one end of which is fixed to the mounting post (310); A fixing component (330) is connected to the other end of the connecting component (320) and is used to fix the limiting mechanism (200).

5. The UHV disconnector main shank protection device according to claim 4, characterized in that: The connecting component (320) comprises a clamping portion (321), a connecting column (322), and a connecting seat (323) connected in sequence; the clamping portion (321) is connected to the mounting column (310); and the connecting seat (323) is used to mount the fixing component (330).

6. The UHV disconnector main shank protection device according to claim 4, characterized in that: An adjusting bolt (311) is provided on the installation column (310); the adjusting bolt (311) is used to adjust the length of the installation column (310).

7. The UHV disconnector main shank protection device according to claim 4, characterized in that: The fixing component (330) is a mechanical clamp; the mechanical clamp is fixed on the connecting component (320).

8. An isolating switch, characterized in that: include: The UHV disconnect switch main shank protection device according to any one of claims 1 to 7; as well as A rotating insulator (400), a flip transmission box (500), and a main cutter bar are sequentially connected; the rotating insulator (400) is used to drive the main cutter bar to rotate horizontally through the flip transmission box (500); the flip transmission box (500) is also used to make the main cutter bar rotate around its own axis; Active contacts (600) are arranged at both ends of the main tool rod; An auxiliary moving contact (700) is provided at the front end of the active contact (600); A main static contact (800), used to control the on / off of the main power supply circuit together with the active contact (600); The auxiliary static contact (900) is used to control the on / off of the auxiliary circuit together with the auxiliary moving contact (700).

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