CN101226846B - Gas-insulated switch - Google Patents
Gas-insulated switch Download PDFInfo
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- CN101226846B CN101226846B CN2008100009119A CN200810000911A CN101226846B CN 101226846 B CN101226846 B CN 101226846B CN 2008100009119 A CN2008100009119 A CN 2008100009119A CN 200810000911 A CN200810000911 A CN 200810000911A CN 101226846 B CN101226846 B CN 101226846B
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Abstract
The invention provides a gas insulated switchgear, capable of preventing the diameter from enlarging in simple structure and rotating the arc with good efficiency and realizing the downsizing and light-weighting in low operating physical force. The opposite side insulating parts (17a) are set at the opposite surface of the non-contact depressed part (22) in the spiral electrodes (15a,15b), in addition a rear-face side insulator (17b) having an equivalent or greater diameter is arranged at a rear face side of the spiral electrodes (15a, 15b). Thus even thought part of the periphery of the arc (26) leaves the arc moving part (23) and protrudes from the non-contact depressed part (22) side or the arc moving part (23), the insulating parts (17a,17b) can still prevent part of the current flowing through the arc (26) from spanning the groove (26b) and flowing through the non-contact depressed part (22) or flowing through the rear-face side of the spiral electrodes (15a,15b), therefore the action to the arc (26) can be stably performed for a long time, depending on the total shape of the groove and the electromagnetic force of the current.
Description
Technical field
The present invention relates to a kind of gas-insulated switch, particularly a kind of have a gas-insulated switch that electrically contacts mutually and make the arc contact of electric arc build-up of luminance when electrode disconnects when electrode is closed.
Background technology
Usually, in gas-insulated switch, the electric arc that produces when disconnecting by electrode in order to restrain damages energising with contact or seal, is provided with arc contact.Promptly, the structure of known gas-insulated switch is: the antagonism of the regulation of being separated by is arranged fixation side conductor and movable side conductor apart from ground, on this fixation side conductor, arc contact is set, simultaneously, on movable side conductor, movable piece is set, front end at arc contact or movable piece is provided with elastic contacting part, makes between movable piece and the arc contact by this elastic contacting part to be electrically connected.
In addition, for example the structure of known gas-insulated switch is in Japan Patent open communique 2003-346611 number (document 1): the central part at arc contact is provided with permanent magnet, or be provided with the cyclic arc moving part of the smooth and continuous that is easy to realize that electric arc rotates at the leading section of arc contact, make the electric arc that when electrode disconnects, produces at this electric arc moving part build-up of luminance, simultaneously, make the electric arc rotational motion to improve the current chopping performance by permanent magnet.
In addition, for example the structure of known gas-insulated switch is in the Japan Patent open clear 58-204429 of communique number (document 2): be provided with the electric arc moving coil in the movable piece front, utilization makes the electric arc rotational motion and carries out arc extinguishing at short notice by electric current formed flux that flows through this electric arc moving coil when the current chopping and the electric current formed electromagnetic force that flows through electric arc.
These gas-insulated switchs are compared with jet-propelled or high speed clean cut system, can reduce operating physical force, and, can realize the miniaturization and of operating means, in addition, by reducing the operating physical force of operating means, the reliability of device and economy are also good.
But the known gas-insulated switch of the electric arc type of drive that realizes by electromagnetic force had following problem in the past.For example, under the situation of the electric arc type of drive of using permanent magnet, the permanent magnet that the temperature that the electric current that flows through when design must be considered owing to running changes causes is aging, and, the degree of aging that work that the needs cost is a large amount of and time are estimated permanent magnet.In addition, blocking under the situation of alternating current,, therefore, be not suitable for rotating drive electric arc effectively on the principle because electric arc can reverse in every half period rotation direction.
In addition, using under the situation of electric arc driving with the known gas-insulated switch of the electric arc drive-type of coil, must adopt the electric arc drive coil is arranged near the electric arc generating unit, under the steady running state, electric current does not flow through the insulation system of this electric arc drive coil, therefore, complex structure of this part and external diameter are also bigger, thereby can hinder the miniaturization of device.
Summary of the invention
The object of the present invention is to provide a kind of gas-insulated switch, it can prevent enlarged diameter with simple structure, and efficient makes the electric arc rotational motion well, realizes miniaturization and with low operating physical force.
Another object of the present invention is to provide a kind of gas-insulated switch, its by qualification be arranged on the fixation side high-pressure conductor arc contact and with the shift position of the movable piece of arc contact contact separation, can improve and block performance.
To achieve these goals, gas-insulated switch of the present invention is characterised in that: in the closed container of enclosing insulating properties gas, be provided with spaced movable side and fixation side high-pressure conductor, be arranged on the arc contact on the high-pressure conductor of said fixing side, surround the fixation side contact that above-mentioned arc contact is arranged, and movable piece, this movable piece is arranged on the high-pressure conductor of above-mentioned movable side when contacting with said fixing side contacts part and above-mentioned arc contact, and this movable piece with separate with said fixing side contacts part before the electrode of above-mentioned arc contact disconnects, be provided with screw electrode on the phase opposite side front end of at least one in above-mentioned movable piece and above-mentioned arc contact, this screw electrode has the cyclic arc moving part that is positioned at peripheral part, be positioned at above-mentioned electric arc moving part inboard and be formed with the noncontact recess, has helicla flute from above-mentioned electric arc moving part to above-mentioned noncontact recess, the phase opposite side surfaces of above-mentioned noncontact recess is provided with phase opposite side insulating element, based on above-mentioned phase opposite side insulating element, a part that prevents to result from the electric arc of above-mentioned electric arc moving part strides across the groove that is formed on the above-mentioned noncontact recess.
In addition, in order to realize above-mentioned other purpose, gas-insulated switch of the present invention is characterised in that: in the closed container of enclosing insulating properties gas, be provided with spaced movable side and fixation side high-pressure conductor, be arranged on the arc contact on the high-pressure conductor of said fixing side, surround the fixation side contact that above-mentioned arc contact is arranged, and movable piece, this movable piece is arranged on the high-pressure conductor of above-mentioned movable side when contacting with said fixing side contacts part and above-mentioned arc contact, and this movable piece with separate with said fixing side contacts part before the electrode of above-mentioned arc contact disconnects, being respectively equipped with electric field in the relative portion of the high-pressure conductor of above-mentioned movable side and fixation side relaxes and uses seal, be provided with screw electrode on the phase opposite side front end of at least one in above-mentioned movable piece and above-mentioned arc contact, above-mentioned screw electrode has the cyclic arc moving part that is positioned at peripheral part, be positioned at above-mentioned electric arc moving part inboard and be formed with the noncontact recess, has helicla flute from above-mentioned electric arc moving part to above-mentioned noncontact recess, the phase opposite side surfaces of above-mentioned noncontact recess is provided with phase opposite side insulating element, based on above-mentioned phase opposite side insulating element, a part that prevents to result from the electric arc of above-mentioned electric arc moving part strides across the groove that is formed on the above-mentioned noncontact recess, the above-mentioned electric field that the front end of above-mentioned arc contact will be limited to the final position that above-mentioned movable piece separates than fixation side relaxes the more close inboard of leading section of using seal, the position of the front end of above-mentioned movable piece during with current chopping is limited to above-mentioned electric field and relaxes with relaxing between the seal and at the above-mentioned electric field of fixation side and use the seal side, simultaneously, above-mentioned movable side and the screw electrode of the fixation side electric field that stops at above-mentioned movable side and fixation side respectively relaxes the position that the leading section of opposite side mutually with seal retreats to the inside.
Best, it is characterized in that: above-mentioned screw electrode with the opposite side of opposite side insulating element mutually is set, be provided with and possess identical or with the insulant of the side opposite of top external diameter with the phase opposite side with above-mentioned screw electrode.
On the phase opposite side surfaces of gas-insulated switch of the present invention by the noncontact recess in screw electrode phase opposite side insulating element is set, can prevent that the part of the electric arc that produces from striding across the groove of noncontact recess in the electric arc moving part of screw electrode, thereby can prevent reliably under the situation of the groove that strides across the noncontact recess, pass through the electromagnetic force of electric arc moving part rotating drive electric arc because of the bigger reduction of bigger variation of current circuit, therefore, can obtain the stable performance of blocking.And, owing to needn't as in the past, the Electromagnetic Drive coil must be set, and therefore, can not make near the increasing of electric arc generating unit, can prevent from enlarged diameter and drive electric arc effectively to rotate with simple structure, thereby can realize realizing small-sized and lightweight gas-insulated switch with low operating physical force.
In addition, in gas-insulated switch of the present invention, because being arranged on final position that the front end of the arc contact on the high-pressure conductor of fixation side will separate with movable piece is limited to electric field than fixation side and relaxes the more close inboard of leading section with seal, the final position of opening circuit of movable piece is limited in the more close inboard of leading section of using seal than the electric field mitigation of movable side, therefore, can reduce the electric field of arc contact front end and movable piece front end, thereby keep insulation well.In addition, because being limited to the electric field of fixation side and movable side, the position of the movable piece front end during with current chopping relaxes with between the seal and in the electric field mitigation seal side of fixation side, therefore, can make the electric arc cooling by insulating gas, need not to have air jet system and just can carry out more effective current chopping, therefore, can realize to improve the gas-insulated switch that blocks performance.
In addition, in gas-insulated switch of the present invention, by phase opposite side at screw electrode, be provided with and possess identical or with the insulant of the side opposite of top external diameter with the phase opposite side with above-mentioned screw electrode, thus can prevent to reach behind the peripheral part of a part by the electric arc moving part of the electric arc that the electric arc moving part at screw electrode produces screw electrode with the opposite side of opposite side mutually.Though when the part of electric arc reaches side screw electrode and that opposite side is opposite mutually, the electromagnetic force that the current circuit that is formed by helicla flute produces reduces the amount corresponding with its electric current composition, but, can guarantee to prevent this phenomenon for a long time, prevent enlarged diameter and make the electric arc rotational motion effectively with simple structure, thereby can realize realizing small-sized and lightweight gas-insulated switch with low operating physical force.
Description of drawings
Fig. 1 is the integrally-built profile of its demonstration as the gas-insulated switch of one embodiment of the invention;
Fig. 2 is the profile of the electrode closure state of demonstration gas-insulated switch shown in Figure 1;
Fig. 3 disconnects the profile of midvoyage condition for the electrode that shows gas-insulated switch shown in Figure 1;
Fig. 4 is the profile of the electrode off-state of demonstration gas-insulated switch shown in Figure 1;
Fig. 5 is the front elevation as the screw electrode of the major part of gas-insulated switch shown in Figure 1;
Fig. 6 is a front elevation, and it has shown phase opposite side insulant is installed in state on the screw electrode shown in Figure 5;
Fig. 7 is the profile of screw electrode shown in Figure 5;
Fig. 8 is the front elevation of screw electrode of major part of the gas-insulated switch of another embodiment of the present invention;
Fig. 9 is the front elevation of screw electrode of major part of the gas-insulated switch of yet another embodiment of the invention;
Figure 10 is a profile, and its electrode that has shown the gas-insulated switch of another embodiment of the present invention disconnects midvoyage condition;
Figure 11 is the profile of the electrode off-state of demonstration gas-insulated switch shown in Figure 10;
Figure 12 is a profile, and it has shown the profile of a screw electrode of gas-insulated switch shown in Figure 10;
Figure 13 is the profile of another screw electrode of demonstration gas-insulated switch shown in Figure 10.
Embodiment
Below, at first utilizing Fig. 1, Fig. 2 and Fig. 5 describe the gas-insulated switch as an example of the present invention.
The electrode closure state that in the profile of Fig. 1, has shown gas-insulated switch of the present invention.In closed container 1, form gas zones, in this gas zones,, be packaged with SF as insulating gas by insulating washer 20
6Gas etc. angrily body, dry air, nitrogen, carbon dioxide, contain the angrily SF of body
6/ N
2Mist, do not contain the angrily N of body
2/ O
2Mist etc.
In the conductor that the central part of insulating washer 20 is buried underground, with the state of closed container 1 electric insulation under, the movable side and the fixation side high-pressure conductor 11,12 of be separated by regulation insulation distance and phase opposite disposed are being fixed in supporting respectively, be respectively equipped with electric field and relax with seal 7,8 on mutually opposed of these high-pressure conductors 11,12.
The movable piece 2 that is arranged on high-pressure conductor 11 sides is by the external operation device (not shown), can move on its axis by insulating bar 3.In addition, be provided with movable side contacts part 6 in the inside of high-pressure conductor 11, by this movable side contacts part 6, the 2 normal phases of movable piece keep the electric contact state with high-pressure conductor 11.
As shown in the major part enlarged drawing of Fig. 2, be fixed with arc contact support 9 in high-pressure conductor 12 sides, the arc contact 5 that in this arc contact support 9, is provided with spring 10 and can promotes to movable piece 2 side shifting certain distance ground by this spring 10.Between arc contact support 9 and the electric field that surrounds its peripheral part relax with seal 8, be provided with fixation side contact 4, between the leading section of the movable piece under the electrode closure state 2 and arc contact support 9, form and be electrically connected.
Though having omitted detailed accompanying drawing shows, but, by spring 10, arc contact 5 is moved a certain distance in arc contact support 9, in sliding part, be provided with the current collection element, even so that in this moves, still can between arc contact 5 and arc contact support 9, keep electric contact state well.
Phase opposite side front end at movable piece 2 and arc contact 5 is respectively equipped with the back with the screw electrode 15a, the 15b that describe in detail.These screw electrodes 15a, 15b be for roughly discoideus, its external diameter less than the external diameter of movable piece 2 so that can be because of not stoping mobile with contacting of fixation side contact 4.
In addition, after the phase opposite side leading section of arc contact 5 forms the minor diameter part 5a that external diameter reduces, screw electrode 15a is installed, same, after the phase opposite side leading section of movable piece 2 forms the minor diameter part 2a that external diameter reduces, screw electrode 15b is installed.
Under the electrode closure state of gas-insulated switch, movable piece 2 makes its phase opposite side front end enter to the electric field mitigation with contacting in the seal 8 and with fixation side contact 4, simultaneously, the screw electrode 15b that is arranged on its phase opposite side front end is pressed against on the screw electrode 15a.At this moment, by the spring 10 that loads by arc contact 5, between the screw electrode 15a on the screw electrode 15b and the front end of opposite side mutually that is arranged on arc contact 5 that are arranged on the phase opposite side front end of movable piece 2, keep suitable contact pressure.
Under the state of electrode closure, form the current channel of so-called high-pressure conductor 11 → movable side contacts part 6 → movable piece 2 → fixation side contact 4 → arc contact support 9 → high-pressure conductor 12 and the current channel of so-called high-pressure conductor 11 → movable side contacts part 6 → movable piece 2 → screw electrode 15b → screw electrode 15a → arc contact 5 → current collection element 16 → arc contact support 9 → high-pressure conductor 12.Therefore, compare with the situation that arc contact 5 is not set, the temperature in order to restrain the energising that produces because of contact resistance the time rises, and can make the external diameter of movable piece 2 thinner than in the past.
Below, the concrete structure of screw electrode 15a, 15b is elaborated.Because screw electrode 15a, 15b all adopt roughly the same structure, therefore, utilize the plane graph of Fig. 5 that screw electrode 15b is described herein.
On the noncontact recess 22 of the phase opposite side of this screw electrode 15b and electric arc moving part 23, form near continuous 3 helicla flutes 24 of outer peripheral face minor diameter part 2a.
Because these 3 helicla flutes 24 are roughly the same shape, therefore, only one of them are described.Helicla flute 24 is by the groove 24a that tilts to cut electric arc moving part 23 in the mode that has the angle of inclination with respect to the imaginary line that forms screw electrode 15b radius and intersect from its peripheral part, be formed at the groove 24b of the noncontact recess 22 at electric arc moving part 23 adjoining position places and with specific length with the arcuation of specific length and be formed at along the groove 24d of the position of the minor diameter part 2a periphery of noncontact recess 22, the groove 24c of link slot 24b and groove 24d forms a series of continuous grooves.
The fan-shaped angle α of this helicla flute 24, that is, the center that connects screw electrode 15b forms about 180 degree with the imaginary line of the outer circumference end of helicla flute 24 with the fan-shaped angle [alpha] of the imaginary line of the interior Zhou Duan of center that is connected screw electrode 15b and helicla flute 24.
The screw electrode 15a paired with screw electrode 15b also adopted identical structure.Under the situation that does not have above-mentioned a series of helicla flute 24, though radial direction along screw electrode 15a, 15b, to the arcing electromagnetic actuation force that between the A point of the relative portion of two screw electrode 15a, 15b, produces, but, by above-mentioned electrode shape and helicla flute 24, can increase the circumferencial direction composition of the electromagnetic actuation force that acts on electric arc, thus can be along the electric arc moving part 23 rotating drive electric arcs of ring-type.
Fig. 6 and Fig. 7 are for arranging phase opposite side insulant 17a plane graph and profile afterwards in the noncontact recess 22 on the phase opposite side that is formed at screw electrode 15b shown in Figure 5.
From this figure as can be known, the phase opposite side of screw electrode 15b is except cyclic arc moving part 23, and the almost whole of noncontact recess 22 covers by phase opposite side insulant 17a.By this phase opposite side insulant 17a, can make in the part of the peripheral part of the electric arc that produces on the electric arc moving part 23 and can not easily cross the helicla flute 24 that is formed on the noncontact recess 22 and switch on.
Can consider the installation method of various phase opposite side insulant 17a.The arrangement of Cai Yonging is in the present example: the central part at phase opposite side insulant 17a forms through hole, by phase opposite side from screw electrode 15b, being screwed into screw 25 through through hole to minor diameter part 2a side fixes, even under state of contact between the electric arc moving part 23 of paired screw electrode 15a and screw electrode 15b, this phase opposite side insulant 17a still is in contactless state, so that mechanical strength can not increase.
As the electrode material that forms screw electrode 15a, 15b, can consider to use having copper and tungsten for arc heat against power, or copper and chromium, perhaps copper and aluminium oxide are the alloy of main component.In addition, as the insulating element of phase opposite side insulant 17a, the insulating properties gas in closed container 1 is SF
6Under the situation of gas, can use PTFE, insulating paper, nylon, aluminium oxide etc., and for the insulating properties gas that contains aerobic, then can adopt flame retardant materials such as PTFE.
Below, action describes to the current chopping of above-mentioned gas insulated switch.
If the electrode closure state from Fig. 1 rotates insulating bar 3 to apply electrode closed procedure power along clockwise direction by the external operation device (not shown), then movable piece 2 edges electrodes disconnection direction to the right moves.At first, movable piece 2 leaves fixation side contact 4 shown in Figure 2, thereby blocks the current channel that flows through by this contact site.
But, because under the electrode closure state, arc contact 5 is under compression spring 10 and the state to its loading, therefore, be between screw electrode 15a, the 15b under the state of crimping, disconnecting direction along electrode and move, thus the current channel that maintenance is flow through by this contact site.At this moment, because the screw electrode 15b that screw electrode 15a follows movable piece 2 sides by spring 10 moves a certain distance so that electrode disconnects hysteresis, therefore, fixation side contact 4 not can and himself between produce electric arc, because the influence that can not bear its heat, therefore, often the phase keeps stable energising performance.
Afterwards, as shown in Figure 3, relax the position that the leading section with seal 8 moves back after a while, then stop the mobile of arc contacts 5 by arc contact support 9 if screw electrode 15a only moves to than electric field.Like this, will follow the position of leading section of moving of movable piece 2 and the arc contact 5 that moves stop to move to be limited to by arc contact support 9 and relax the more close inboard of leading section with seal 8 than electric field.
And the electrode of the movable piece 2 by after this disconnects action, disconnects between screw electrode 15a, the 15b, produces electric arc 26 between both electric arc moving parts 23.This electric arc 26 bears electromagnetic force by structure and the cut-off current of above-mentioned paired screw electrode 15a, 15b, when cyclic arc moving part 23 is rotated, accepts the influence of insulating properties gas, carries out arc extinguishing and current chopping at the current zero place and finishes.For the screw electrode 15b on the leading section that is arranged on this movable piece 2, because being limited to the electric field of movable side and fixation side, the position during with current chopping relaxes with between the seal 7,8, therefore, electric arc between two screw electrode 15a, 15b is present in a large amount of insulating gas atmosphere, thereby can cool off effectively by insulating gas, so that combine the promotion current chopping with the effect of screw electrode 15a, 15b, block performance with raising.
Under the end-of-job state that electrode disconnects, as shown in Figure 4, movable piece 2 relaxes with moving in the seal 7 at the electric field of movable side, and the screw electrode 15b of its phase opposite side front end forms than electric field and relaxes the position relation that retreats slightly with seal 7. Screw electrode 15a, 15b compare with the front end of opposite side mutually of movable piece 2, form the shape that electric field is easy to concentrate.But under the state that electrode disconnects, two screw electrode 15a, 15b stop at respectively than electric field and relax the position that the phase opposite side leading section with seal 7,8 retreats slightly to the inside.Thus, electric field can be reduced and restrain, thereby insulation can be kept between electrode well at the phase opposite side of screw electrode 15a, 15b.
, electric arc 26 shown in Figure 3 has certain size, and has near the characteristic that current density is higher and current density reduces along with leaving its central authorities its central authorities.Therefore, even for the electric arc that produces between electric arc moving part 23, its integral body is not to be positioned on the electric arc moving part 23, and its peripheral part leaves the electric arc moving part 23 of screw electrode 15a, 15b slightly.For example, all can widen until noncontact recess 22 sides that are positioned at electric arc moving part 23 inboards.Therefore, if there is not phase opposite side insulant 17a, a part that then flows through the electric current of electric arc 26 also can flow through noncontact recess 22.For example, even on noncontact recess 22 sides of the groove 24b that strides across helicla flute 24, also can flow through the part of electric current.In this case, it is big that the current circuit that is formed by helicla flute 24 becomes, and depends on that the helicla flute electrode shape that comprises helicla flute 24 and the electromagnetic force of size of current can reduce.
But as mentioned above, the phase opposed faces side of the noncontact recess 22 of screw electrode 15a, 15b is provided with phase opposite side insulant 17a.Therefore, even the peripheral part of electric arc 26 is side-prominent to noncontact recess 22 from electric arc moving part 23, stop by this phase opposite side insulant 17a, a part that flows through the electric current of electric arc 26 can not stride across screw electrode 15a, 15b yet and flow through at noncontact recess 22.
Therefore, can stably act on the shape that depends on groove integral body and the electromagnetic force of size of current to the 26 normal phases of electric arc, and, can force electric arc 26 to rotate in the insulating gas high speed, and be easy to eliminate electric arc 26 by the cooling effect in this rotation, thereby often the phase keeps stable current chopping performance.Like this, the diameter that reduces the operating physical force of operating means and dwindle movable piece 2 that can pass is realized small-sized and lightweight gas-insulated switch.
Though explanation recited above is carried out at screw electrode 15b side, but, because the structure of the screw electrode 15b that the mode that overlaps with each other helicla flute 24 under contact condition forms also is identical, therefore, can obtain identical effect in the both sides of screw electrode 15a, 15b.In addition, in other embodiments, only any one in movable piece 2 and arc contact 5 used screw electrode, and 17a can expect to obtain roughly the same effect by phase opposite side insulant.
The phase opposite side insulant 17a that is separately positioned on the opposite face side of the noncontact recess 22 among screw electrode 15a, the 15b must be arranged on the whole noncontact recess 22, as long as can not cross the groove 24b of noncontact recess 22 in the part of the electric arc 26 of 23 generations of electric arc moving part.
For example, also phase opposite side insulant 17a can only be set on the peripheral part of the noncontact recess 22 that is positioned at electric arc moving part 23 sides.This be since with the noncontact recess 22 at electric arc moving part 23 adjoining position places in be formed with the groove 24b that forms with specific length circular-arcly, the groove 24b that this arcuation ground forms also can be as the phase opposite side insulant 17a that is arranged on above-mentioned noncontact recess 22 peripheral parts under the situation of leaving 23 formation of electric arc moving part slightly.
In this case, the reason that the part of electric arc 26 flows into by noncontact recess 22 is to exist the slot part of the groove 24a that connects above-mentioned arcuation groove 24b and electric arc moving part 23, therefore, as long as phase opposite side insulant 17a is set near this slot part at least.In addition, as phase opposite side insulant 17a, also can be the insulant of other parts on the phase opposite side that is arranged on noncontact recess 22 in the above described manner, also can be with the Unitarily molded formed insulant covering of the phase opposite side of noncontact recess 22.
In addition, do not cross the groove 24b of noncontact recess 22, can consider to make the width of helicla flute 24 to arrive to a certain degree size yet for the part of the electric arc 26 of 23 generations of electric arc moving part.But, in this case, since the metallic vapour of considering the part by helicla flute 24 back electric arcs or producing by electric arc etc. can by screw electrode 15a, 15b with the opposite side of opposite side mutually, therefore, hope is arranged on noncontact recess 22 with phase opposite side insulant 17a, and to make the width of helicla flute 24 be below the 10mm.
In Fig. 8, shown screw electrode 15b as the gas-insulated switch of other embodiment of the present invention.This screw electrode 15b forms 2 helicla flutes 24 with roughly the same shape.Helicla flute 24 by with have angle of inclination and the mode of intersecting with respect to the imaginary line that forms screw electrode 15b radius, from the tilt groove 24a of incision electric arc moving part 23 of its peripheral part, with the boundary portion of electric arc moving part 23 near noncontact recess 22 in form a series of continuous grooves with the groove 24b of the circular-arc formation longer and sentencing groove 24d that specific length forms and the groove 24c of link slot 24b and groove 24d along the noncontact recess 22 of the position of minor diameter part 3a periphery than Fig. 5.
The fan-shaped angle α of this helicla flute 24, that is, the center that connects screw electrode 15b forms about 240 degree with the imaginary line of the outer circumference end of helicla flute 24 with the fan-shaped angle α of the imaginary line of the interior Zhou Duan of center that is connected screw electrode 15b and helicla flute 24.Because therefore fan-shaped angle α, can further increase the electromagnetic force of the circumferencial direction composition that acts on the electric arc greater than 180 degree of Fig. 3.
In Fig. 9, shown the screw electrode 15b of the gas-insulated switch of other embodiment among the present invention.This screw electrode 15b only has 1 helicla flute 24.Helicla flute 24 by with have angle of inclination and the mode of intersecting with respect to the imaginary line that constitutes screw electrode 15b radius, from the tilt groove 24a of incision electric arc moving part 23 of its peripheral part, with the boundary portion of electric arc moving part 23 near noncontact recess 22 in than Fig. 8 longer form a series of continuous grooves near the groove 24b of the circular-arc formation in a week and sentencing groove 24d that the length that is longer than Fig. 8 forms and the groove 24c of link slot 24b and groove 24d along the noncontact recess 22 of the position of minor diameter part 3a periphery.
The fan-shaped angle α of this helicla flute 24 is more than 360 degree.In this embodiment, because fan-shaped angle α greater than Fig. 3 and Fig. 8, therefore, can further increase the electromagnetic force of the circumferencial direction composition that acts on the electric arc.
As can learning,, can further increase the electromagnetic force of the circumferencial direction composition that acts on the electric arc by increasing the length or the fan-shaped angle α of helicla flute 24 by the explanation of above-mentioned each embodiment.According to experimental result, wish that fan-shaped angle α is more than 180 degree.Because by increasing this fan-shaped angle α, paired screw electrode 15a, 15b can provide contact to press and be crimped on together under the state of electrode closure, therefore, should be taken into account the problem on the mechanical strength.
Because groove 24b, 24c, 24d are covered by phase opposite side insulant 17a, therefore, the part of electric arc can not crossed these grooves 24b～24d, so, make groove width below 10mm, can prevent that mechanical strength from reducing.In addition, except electric arc moving part 23, also can so that they form integrative-structure spare, thereby improve mechanical strength by side noncontact recess 22, helicla flute 24 and screw electrode and that opposite side is opposite mutually is molded with insulant.
Figure 10 has shown that the electrode of the gas-insulated switch of other embodiment among the present invention disconnects the state in the way, and the parts identical with enforcement shown in Figure 2 have adopted identical label, the Therefore, omited to their explanation.
On the screw electrode 15b that is installed on the movable piece 2, the phase opposite side insulant 17a on being arranged on the noncontact recess 22 that is formed at its phase opposite side, insulant 17b with the side that opposite side is opposite mutually also is installed at its phase opposite side.Amplify show shown in Figure 12 as major part, on movable piece 2, form minor diameter part 2a, this minor diameter part has external diameter less than the noncontact recess 22 of screw electrode 15b at its leading section, in this minor diameter part 2a, insert the centre bore of the insulant 17b of discoideus and the side that opposite side is opposite mutually, simultaneously, it is clamped between movable piece 2 and the screw electrode 15b.Should with the insulant 17b of the side that opposite side is opposite mutually have with screw electrode 15b about equally or greater than the external diameter of this screw electrode.
In addition, on the screw electrode 15a that is installed on the arc contact 5, the phase opposite side insulant 17a on being arranged on the noncontact recess 22 that is formed at its phase opposite side, the insulant 17b of a side opposite with the phase opposite side is installed also in itself and the side that opposite side is opposite mutually.
Amplify show shown in Figure 13 as major part, on arc contact 5, form minor diameter part 5a, this minor diameter part has external diameter less than the noncontact recess 22 of screw electrode 15a at its leading section, inserts in this minor diameter part 5a and the centre bore of fixed disc shape and the insulant 17b of the side that opposite side is opposite mutually.Should with the insulant 17b of the side that opposite side is opposite mutually have with screw electrode 15b about equally or greater than the external diameter of this screw electrode.These insulant 17b with the side that opposite side is opposite mutually can adopt other various structures to install.
The opposite side of phase at least that relaxes with seal 8 at the electric field of the peripheral part setting of surrounding screw electrode 15a is provided with covering or molded its surperficial insulant 18a, in addition, relax the opposite side of phase at least with seal 7 at the electric field of the peripheral part setting of surrounding screw electrode 15b and be provided with covering or molded its surperficial insulant 18b.Can improve two electric fields by these insulants 18a, 18b and relax, and the insulation distance that can dwindle between relative portion diminishes to make movable piece 2 vertically with the dielectric voltage withstand ability between the relative portion of seal 7,8.The leading section of the phase opposite side that is in two screw electrode 15a, 15b under the electrode off-state is stopped at from these electric fields relax the position that the phase opposite side leading section with seal 7,8 retreats slightly.
For as mentioned above for the electric arc 26 of 23 generations of electric arc moving part of screw electrode 15a, 15b, though its centre on electric arc moving part 23, its peripheral part also can leave electric arc moving part 23.The part of electric arc 26 than electric arc moving part 23 more under the situation that periphery is left, between the inside of the large-diameter portion 5b of screw electrode 15a and arc contact 5 side that opposite side is opposite mutually and electric arc moving part 23 or between the inside of the large-diameter portion 2b of the movable piece 2 of the screw electrode side that 15b's is opposite with the phase opposite side and electric arc moving part 23, its electric current composition directly flows through.
When described electric current composition flows through, switch on by the minor diameter part 2a of movable piece 2 and the minor diameter part 5a of arc contact 5 with original, compare thereby utilize helicla flute 24 to obtain desirable electromagnetic force, the same with above-mentioned phenomenon at noncontact recess 22, can reduce electromagnetic force.
Yet, as shown in figure 12, on the minor diameter part 2a of movable piece 2, so that the mode that shields between the large-diameter portion 2b of screw electrode 15b and movable piece 2 is provided with the insulant 17b with the side that opposite side is opposite mutually, in addition, as shown in figure 13, on the minor diameter part 5a of arc contact 5, so that the mode that shields between the large-diameter portion 5b of screw electrode 15a and arc contact 5 is provided with the insulant 17b with the side that opposite side is opposite mutually.Therefore, even the part of electric arc 26 is more side-prominent to periphery than the electric arc moving part 23 of screw electrode 15a, 15b, by this shielding, can prevent from directly to switch on the side that opposite side is opposite mutually at the peripheral part of screw electrode 15a, 15b with the insulant 17b of the side that opposite side is opposite mutually.
Therefore, whole electric current composition flows through by minor diameter part 2a, 5a usually, can utilize helicla flute 24 to obtain desirable electromagnetic force, in insulating gas, force to make electric arc 26 high speed rotating, be easy to eliminate electric arc 26 by the cooling effect in this rotation, thereby often the phase keeps stable current chopping performance.
In addition, the external diameter of insulant 17b by making this side opposite with the phase opposite side reach external diameter with screw electrode 15a, 15b identical or more than, can prevent the plasma that produces by electric arc 26 or the leading section of metallic vapour damage movable piece 2 or arc contact 5.
In addition, can improve two electric fields by insulant 18a, 18b and relax dielectric voltage withstand between with seals 7,8 mutually opposed, and the phase opposite side leading section that can make two screw electrode 15a, 15b relaxes distance that the phase opposite side front end with seal 7,8 retreats less than Fig. 1 from two electric fields.Therefore, can shorten the movable piece 2 that contains screw electrode 15a, 15b and the length of arc contact 5, so that the further miniaturization of implement device.
The gas-insulated switch of the invention described above also can easily be used for the gas-insulated switch beyond the structure shown in Figure 1.
Claims (4)
1. gas-insulated switch, in the closed container of enclosing insulating properties gas, be provided with spaced movable side and fixation side high-pressure conductor, be arranged on the arc contact on the high-pressure conductor of said fixing side, surround the fixation side contact that above-mentioned arc contact is arranged, and movable piece, this movable piece is arranged on the high-pressure conductor of above-mentioned movable side when contacting with said fixing side contacts part and above-mentioned arc contact, and this movable piece with separate with said fixing side contacts part before the electrode of above-mentioned arc contact disconnects, it is characterized in that: the phase opposite side front end of at least one in above-mentioned movable piece and the above-mentioned arc contact is provided with screw electrode, above-mentioned screw electrode has the cyclic arc moving part that is positioned at peripheral part, be positioned at above-mentioned electric arc moving part inboard and be formed with the noncontact recess, has helicla flute from above-mentioned electric arc moving part to above-mentioned noncontact recess, the phase opposite side surfaces of above-mentioned noncontact recess is provided with phase opposite side insulating element, described phase opposite side insulating element, the part that can prevent to result from the electric arc of described electric arc moving part strides across the helicla flute that is formed on the described noncontact recess.
2. gas-insulated switch according to claim 1 is characterized in that: above-mentioned screw electrode with the opposite side of the above-mentioned insulating element of opposite side mutually is set, be provided with the insulant that possesses the external diameter identical or above with above-mentioned screw electrode.
3. gas-insulated switch, in the closed container of enclosing insulating properties gas, be provided with spaced movable side and fixation side high-pressure conductor, be arranged on the arc contact on the high-pressure conductor of said fixing side, surround the fixation side contact that above-mentioned arc contact is arranged, and movable piece, this movable piece is arranged on the high-pressure conductor of above-mentioned movable side when contacting with said fixing side contacts part and above-mentioned arc contact, and this movable piece with separate with said fixing side contacts part before the electrode of above-mentioned arc contact disconnects, being respectively equipped with electric field in the relative portion of the high-pressure conductor of above-mentioned movable side and fixation side relaxes and uses seal, it is characterized in that: the phase opposite side front end of at least one in above-mentioned movable piece and the above-mentioned arc contact is provided with screw electrode, above-mentioned screw electrode has the cyclic arc moving part that is positioned at peripheral part, be positioned at above-mentioned electric arc moving part inboard and be formed with the noncontact recess, has helicla flute from above-mentioned electric arc moving part to above-mentioned noncontact recess, the phase opposite side surfaces of above-mentioned noncontact recess is provided with phase opposite side insulating element, described phase opposite side insulating element, the part that can prevent to result from the electric arc of described electric arc moving part strides across the helicla flute that is formed on the described noncontact recess, the above-mentioned electric field that the front end of above-mentioned arc contact will be limited to the final position that above-mentioned movable piece separates than fixation side relaxes the more close inboard of leading section of using seal, the position of the front end of above-mentioned movable piece during with current chopping is limited to above-mentioned electric field and relaxes with relaxing between the seal and at the above-mentioned electric field of fixation side and use the seal side, simultaneously, above-mentioned movable side and the screw electrode of the fixation side electric field that stops at above-mentioned movable side and fixation side respectively relaxes the position that the leading section of opposite side mutually with seal retreats to the inside.
4. gas-insulated switch according to claim 3 is characterized in that: above-mentioned screw electrode with the opposite side of the above-mentioned insulating element of opposite side mutually is set, be provided with the insulant that possesses the external diameter identical or above with above-mentioned screw electrode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-006749 | 2007-01-16 | ||
| JP2007006749 | 2007-01-16 | ||
| JP2007006749A JP4852434B2 (en) | 2007-01-16 | 2007-01-16 | Gas insulated switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101226846A CN101226846A (en) | 2008-07-23 |
| CN101226846B true CN101226846B (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100009119A Active CN101226846B (en) | 2007-01-16 | 2008-01-07 | Gas-insulated switch |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4852434B2 (en) |
| CN (1) | CN101226846B (en) |
| TW (1) | TWI345254B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102187537B (en) | 2008-11-26 | 2013-11-27 | 株式会社日立制作所 | Gas-insulated switching device |
| US8878092B2 (en) | 2009-06-25 | 2014-11-04 | Mitsubishi Electric Corporation | Gas-insulated switchgear |
| JP5434406B2 (en) * | 2009-09-09 | 2014-03-05 | 株式会社日立製作所 | Disconnector |
| CN102290278B (en) * | 2011-08-04 | 2015-04-22 | 中国西电电气股份有限公司 | Arc striking device for electric switch equipment |
| JP5961564B2 (en) * | 2013-01-28 | 2016-08-02 | 株式会社日立製作所 | Gas insulated switch |
| JP2014235954A (en) * | 2013-06-05 | 2014-12-15 | 株式会社日立製作所 | Gas insulation switch |
| JP6975111B2 (en) * | 2018-09-14 | 2021-12-01 | 株式会社日立製作所 | Gas insulation switchgear |
| CN113574652B (en) * | 2019-03-18 | 2023-09-01 | 日本碍子株式会社 | Electrostatic Chuck |
| JP2021064441A (en) * | 2019-10-10 | 2021-04-22 | 株式会社日立製作所 | Disconnector and gas-insulation switchgear |
| JP7492376B2 (en) * | 2020-05-28 | 2024-05-29 | 株式会社日立製作所 | Switchgear |
| JP7393310B2 (en) * | 2020-08-24 | 2023-12-06 | 株式会社日立製作所 | gas insulated switchgear |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57141823A (en) * | 1981-02-25 | 1982-09-02 | Takamatsu Electric Works Ltd | Electrode structure for switch |
| JPS60181835A (en) * | 1984-02-29 | 1985-09-17 | Toshiba Corp | Information processor |
| DE3444829A1 (en) * | 1984-12-08 | 1986-06-12 | Robert Bosch Gmbh, 7000 Stuttgart | BRAKE POWER AMPLIFIER |
| JP4197406B2 (en) * | 2002-05-23 | 2008-12-17 | 三菱電機株式会社 | Gas insulated switch |
-
2007
- 2007-01-16 JP JP2007006749A patent/JP4852434B2/en active Active
- 2007-12-14 TW TW96147822A patent/TWI345254B/en active
-
2008
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4852434B2 (en) | 2012-01-11 |
| JP2008176942A (en) | 2008-07-31 |
| TW200832478A (en) | 2008-08-01 |
| TWI345254B (en) | 2011-07-11 |
| CN101226846A (en) | 2008-07-23 |
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