Abstract
A three-position vacuum switch for realizing external grounding of a load side by using a bridge switch overcomes the problems in the prior art that load side grounding is realized depending on the opening and closing of a vacuum arc extinguishing chamber, a misoperation easily occurs because an operator cannot see the grounding situation intuitively, and when an operating mechanism machine has a problem, it needs to have a grounding line plugged in externally, which cause inconvenient operations with huge safety risks, a complicated structure and relatively high cost, characterized in that a bridge grounding switch is provided on the other side of the three-position vacuum switch to realize external grounding of the load side via the bridge grounding switch.
Claims
1. A three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch comprising the line buses (1), a vacuum interrupter (2), an operating mechanism (3) and the load buses (5), wherein the vacuum interrupter (1) is driven by the operating mechanism (3) to realize the breaking of the line buses (1), and the vacuum interrupter (2) rotates to realize the closing disconnection and load-side grounding, is characterized in that: the other side of the three-position vacuum switch composing of the line buses (1), a vacuum interrupter (2), an operating mechanism (3) and the load buses (5) is provided with a bridge switch (4) to realize the visual grounding of load buses (5) by bridge switch.
2. A three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 1 is characterized in that: The bridge switch (4) is composed of a grounding static conductor (4-1) and a rotating grounding bridge arm (4-2a); the static conductor (4-1) is provided with the grounding static contacts (4-1-1); the bridge arm contacts (4-2-1) are welded on the rotating grounding bridge arm (4-2a).
3. A three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 1 is characterized in that: The bridge grounding switch (4) is composed of a grounding static conductor (4-1) and a straight grounding bridge arm (4-2b); the grounding static conductor (4-1-1) is provided with the grounding static contacts (4-1-1), and the bridge arm contacts (4-2-1) are welded on the straight grounding bridge arm (4-2b).
4. A three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 2 is characterized in that: When the static conductor contacts (2-1-1) on the static conductor (2-1) of the vacuum interrupter (2) are positioned between the line contacts (1-1) on the line buses (1) and the grounding static contacts (4-1-1) on the grounding static conductor (4-1), an isolation position and a grounding position are formed on the three-position switch, and a visual grounding fracture is formed on the three-position switch between the static conductor contacts (2-1-1) on the static conductor (2-1) and the grounding static contacts (4-1-1) on the grounding static conductor (4-1); the static conductor contacts (2-1-1) on the static conductor (2-1) are contacted with the grounding static contacts (4-1-1) on the wounding static conductor (4-1), to realize the grounding closing position of the three-position switch; driven by the bridge grounding switch driving mechanism, the rotating grounding arm (4-2a) on the bridge grounding switch (4) rotates to the bridge arm contacts (4-2-1) on the rotating grounding bridge arm (4-2a) around the bridge grounding switch driving points (6) and contacted with the moving conductor contacts (2-3-1) on the moving conductor (2-3), to realize the visual load bus (5) side external grounding.
5. A three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 3 is characterized that: driven by the switch driving mechanism with the bridge grounding switch driving point (6) as the driving point, the straight grounding bridge arm (4-2b) on the bridge grounding switch (4) moves to the bridge arm contacts (4-2-1) on the straight bridge arm (4-2b) in a straight line and contacts with the moving conductor contacts (2-3-1) on the moving conductor (2-3), to realize the visual load bus (5) side external grounding.
6. The three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 4 is characterized in that: The vacuum interrupter (2) is to only withstand the breaking process; the vacuum interrupter (2) and the insulating gas are to only jointly withstand the power frequency and lightning impulse withstand voltage after breaking.
7. The three-position vacuum switch for realizing load-side external grounding utilizing a bridge switch of claim 2 is characterized in that: The rotating grounding bridge arm (4-2a) is composed of two straight bridge arms mutually perpendicular to each other and integrally.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a diagram of the line conducting structure of the invention;
[0019] FIG. 2 is a top view of FIG. 1;
[0020] FIG. 3 is a diagram of the lines of the invention in breaking and in the isolated closing position;
[0021] FIG. 4 is a diagram of the lines of the invention in breaking and in the middle position (isolated position, grounding position);
[0022] FIG. 5 is a diagram of the lines of the invention in breaking and in the grounding closing position;
[0023] FIG. 6 is a diagram of the lines of the invention in breaking and in the grounding position and in the load grounding.
[0024] FIG. 7 is a diagram of another embodiment of the invention of the line breaking, grounding and grounding in the load diagram.
[0025] As shown in FIGS:
[0026] 1. Line bus; 1-1. Line contacts;
[0027] 2. Vacuum interrupter;
[0028] 2-1. Static conductor; 2-1-1. Static conductor contacts;
[0029] 2-2. Static contacts;
[0030] 2-3. Moving conductor; 2-3-1. Moving conductor contacts;
[0031] 2-4. Moving contacts;
[0032] 2-5. Insulating cylinder;
[0033] 2-6. Static cover;
[0034] 2-7. Moving cover;
[0035] 2-8. Bellows,
[0036] 3. Operating mechanism;
[0037] 4. Bridge grounding switch;
[0038] 4-1. Static grounding conductor; 4-1-1 Ground static contacts;
[0039] 4-2a. Rotating grounding bridge arm;
[0040] 4-2b. Straight grounding bridge arm:
[0041] 4-2-1. Bridge arm contacts;
[0042] 5. Load buses;
[0043] 6. Bridge grounding switch driving point.
DETAILED DESCRIPTION OF THE INVENTION
[0044] The embodiments of the invention are given in FIGS.
[0045] Embodiment 1
[0046] As shown in FIG. 1 and FIG. 2, the invention comprises the line buses 1, a vacuum interrupter 2, an operating mechanism 3 and the load buses 5; the line buses are provided with line contacts 1-1; the vacuum interrupter 2 is composed of a moving conductor 2-3 and the moving contacts 2-4, a static conductor 2-1, a static contact 2-2, an insulation tube 2-5, a static cover 2-6, a moving cover 2-7, and bellows 2-8; the static conductor 2-1 is provided with the static conductor contacts 2-1-1; the moving conductor 2-3 and the moving contacts 2-4 are welded into a whole, and the part of moving conductor 2-3 is exposed outside the insulating cylinder 2-5; the moving conductor contacts 2-3-1 are welded at the top of the section outside the insulating cylinder 2-5 exposed to the moving conductor 2-3; the section of the moving conductor 2-3 welded with the moving contacts 2-4 is positioned in the insulating cylinder 2-5; the moving cover 2-7 is welded at the lower end of the insulating cylinder 2-5; also the bellow 2-8 are welded between the moving cover 2-7 and the moving conductor 2-3 to form a sealing structure; the static conductor 2-1 and the static contacts 2-2 are welded into a whole; and the part of the static conductor 2 is exposed outside the insulating cylinder 2-5; the static conductor contacts 2-1-1 are welded at the top of the section outside the insulating cylinder 2-5 exposed to the static conductor 2-1; the section of static conductor 2-1 welded with the static contacts 2-2 is positioned in the sealing insulating cylinder 2-5; the static cover 2-6 is welded at the upper end of the insulating cylinder 2-5; the static conductor 2-1 is welded on the central bore of the static cover 2-6 to form a sealing structure; the insulating cylinder 2-5 is in vacuum state when using; the moving contacts 2-4 move in the insulating cylinder 2-5 in a straight line driven by the moving conductor 2-3, to realize line breaking and conducting; the other side of the three-position vacuum switch composing of the bus line 1, the vacuum interrupter 2, the operating mechanism 3 and 5 load bus is provided with the bridge grounding switch 4; the bridge grounding switch 4 is composed of a grounding static conductor 4-1 and rotating grounding bridge arm 4-2a; the grounding static conductor 4-1 is provided with the grounding static contacts 4-1-1; the rotating grounding bridge arm 4-2a is composed by two straight-line bridge arms vertical to each other and welded into a whole; the bridge arm contacts 4-2-1 are welded on the rotating grounding bridge arm 4-2a; the bridge ground in switch driving points 6 are provided between the grounding static conductor 4-1 and the rotating grounding bridge arm 4-2a.
[0047] As shown in FIG. 4, an isolating fracture is formed on the three-position switch between the line contacts 1-1 on the line buses 1 and the static conductor contacts 2-1-1 on the static conductor 2-1; when the static conductor contacts 2-1-1 on the static conductor 2-1 are positioned between the line contacts 1-1 on the line buses 1 and the grounding static contacts 4-1-1 on the grounding static conductor 4-1, a middle position (i.e. an isolation position and a grounding position) is formed on the three-position switch; a visual grounding fracture is formed on the three-position switch between the, static conductor contacts 2-1-1 on the static conductor 2-1 and the grounding static contacts 4-1-1 on the grounding static conductor 4-1.
[0048] As shown in FIG. 5, the static conductor contacts 2-1-1 on the static conductor 2-1 are contacted with the grounding static contacts 4-1-1 on the grounding static conductor 4-1, to realize the grounding closing position of the three-position switch; meanwhile, the grounding static contacts 4-1-1 on the grounding static conductor 4-1 has a fixation role on the vacuum interrupter 2.
[0049] As shown in FIG. 6, driven by the switch driving mechanism, the rotating grounding arm 4-2a on the bridge grounding switch 4 rotates to the bridge arm contacts 4-2-1 on the rotating grounding bridge arm 4-2a around the bridge grounding switch driving points 6, to realize the visual load bus side external grounding 5.
[0050] The vacuum interrupter is to only withstand the breaking process. The vacuum interrupter and the insulating gas are to only jointly withstand the power frequency and lightning impulse withstand voltage after breaking.
[0051] Utilizing procedures are described as below:
[0052] Step 1 in FIG. 1 shows line conducting state; the vacuum interrupter 2 in the closing position, the line contacts 1-1 on the line buses 1 are contacted with the static conductor contacts 2-1-1 on the and static conductor 2-1, to realize the three-position switch isolating and closing position;
[0053] Step 2 in FIG. 3 shows a line breaking state; the moving conductor 2-3 moves driven by the moving conductor 2-3, to realize the vacuum interrupter 2 breaking, so that the lines are in breaking; the load buses 5 is not charged, three-position switch is still in the isolating and closing position;
[0054] Step 3 in FIG. 4 shows a line breaking state, the operating mechanism 3 rotates to the middle position driven by the vacuum interrupter 2, then the vacuum interrupter 2 is still in position, while the line contacts 1-1 on the line buses 1 is separated from the static conductor contacts 2-1-1 on the static conductor 2-1, to realize the three-position switch isolation and position, that is middle position, also is the grounding position, forming a significant fracture to improve is security;
[0055] Step 4 FIG. 5 shows a line breaking state 4, the operating mechanism 3 rotates to the static conductor contacts 2-1-1 on the static conductor 2-1 driven by the vacuum interrupter 2 and contacted with the grounding static contacts 4-1-1 on the grounding conductor 4-1, to realize the grounding closing position of the three-position switch; meanwhile, the grounding static contacts 4-1-1 on the grounding static conductor 4-1 has a fixation role on the vacuum interrupter 2.
[0056] Step 5 in FIG. 6 shows a line breaking state; then the vacuum interrupter 2 is still in position; the three-position switch is in the grounding closing position ; driven by the bridge grounding switch driving mechanism, the rotating grounding arm 4-2a on the bridge grounding switch 4 rotates to the bridge arm contacts 4-2-1 on the rotating grounding bridge arm 4-2a around the bridge grounding switch driving points 6 and contacted with the moving conductor contacts 2-3-1 on the moving conductor 2-3, to realize the load bus 5 side external grounding; the rotating grounding bridge arm 4-2a is positioned outside the vacuum interrupter 2, and its closing or breaking can be visually seen by the operator, so that the equipment operation is more convenient with higher safety factor; meanwhile, the grounding static contacts 4-1-1 on the grounding static conductor 4-1 has a fixation role on the vacuum interrupter 2. So the vacuum interrupter 2 will not appear shocks when it is broken and closed, so that the invention is safer and more reliable and its structure simple.
[0057] Embodiment 2
[0058] As shown in FIG. 7, same as specific embodiment 1, the differences are that the bridge grounding switch 4 is composed of the grounding static conductor 4-1 and the straight grounding bridge arm 4-2b; the bridge arm contacts 4-2-1 are welded on the straight grounding bridge arm 4-2b; FIG. 7 shows a line breaking state; at this time, the vacuum interrupter 2 is in position; three-position switch is in the isolation position (i.e. the middle position; driven by the switch driving mechanism with the bridge grounding switch driving point 6 as the driving point, the straight grounding bridge arm 4-2b on the bridge grounding switch 4 moves to the bridge arm contacts 4-2-1 on the straight bridge arm 4-2b in a straight line and contacts with the moving conductor contacts 2-3-1 on the moving conductor 2-3, to realize the visual load bus 5 side external grounding; the rotating grounding bridge arm 4-2b is positioned outside the vacuum interrupter 2, and its dosing or breaking can be visually seen by the operator, so that the equipment operation is more convenient with higher safety factor; meanwhile, the grounding static contacts 4-1-1 on the grounding static conductor 4-1 has a fixation role on the vacuum interrupter 2. So the vacuum interrupter 2 will not appear shocks when it is broken and dosed, so that the invention is safe and reliable and its structure is simple.
[0059] The line bus 1, line contacts 1-1, static conductor 2-1 and static conductor contact 2-1-1, static contacts 2-2, moving conductor 2-3, moving contact 2-4, bridge grounding switch 4 and load bus 5 are all good load bus conductors.
