WO2018086350A1 - 灭弧栅片和包含该灭弧栅片的灭弧装置及包含该灭弧装置的开关 - Google Patents

灭弧栅片和包含该灭弧栅片的灭弧装置及包含该灭弧装置的开关 Download PDF

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Publication number
WO2018086350A1
WO2018086350A1 PCT/CN2017/088881 CN2017088881W WO2018086350A1 WO 2018086350 A1 WO2018086350 A1 WO 2018086350A1 CN 2017088881 W CN2017088881 W CN 2017088881W WO 2018086350 A1 WO2018086350 A1 WO 2018086350A1
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WO
WIPO (PCT)
Prior art keywords
arc
extinguishing
receiving portion
arc extinguishing
channel
Prior art date
Application number
PCT/CN2017/088881
Other languages
English (en)
French (fr)
Inventor
龚柱
Original Assignee
龚柱
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 龚柱 filed Critical 龚柱
Priority to PCT/CN2017/088881 priority Critical patent/WO2018086350A1/zh
Priority to GB1914037.5A priority patent/GB2577635B/en
Priority to US16/624,992 priority patent/US10818445B2/en
Priority to CN201780015276.9A priority patent/CN109314002B/zh
Publication of WO2018086350A1 publication Critical patent/WO2018086350A1/zh
Priority to CN201880031415.1A priority patent/CN111033662A/zh
Priority to PCT/CN2018/100912 priority patent/WO2018228611A1/zh
Priority to PCT/CN2018/101206 priority patent/WO2018228612A2/zh
Priority to CN201880031404.3A priority patent/CN111052289B/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H2009/365—Metal parts using U-shaped plates

Definitions

  • the present invention relates to the field of power equipment, and in particular, to an arc chute.
  • the arc extinguishing device is a grid arc extinguishing cover, which is used to extinguish the arc by dividing the arc into a plurality of short arcs connected in series.
  • the arc heats the surrounding gas, causing the gas to rapidly expand and expand.
  • the expanded gas enters the arc extinguishing device and is finally discharged from the air outlet of the arc chute.
  • the arc is a bundle of free gas, extremely light in weight and easily deformed. Under the action of gas or liquid flow or electromagnetic force, the arc can move rapidly, stretch or bend.
  • the arc Due to the electromagnetic force or other external force (airflow, liquid flow), the arc is introduced into the metal grid, and a long arc is divided into a plurality of short arcs connected in series by a plurality of metal grids. If the sum of the initial dielectric strengths of all series short arc cathode regions is always greater than the applied voltage between the contacts, the arc will not reignite and extinguish, that is, if the single arc gap voltage is less than the dielectric recovery strength, then a single arc gap The arc is no longer re-ignited. If the arc of each arc gap is no longer re-ignited, the arc in the entire arc extinguishing device is extinguished.
  • the voltage of the single arc gap will be smaller, and the more the arc is re-ignited. Due to the limitation of the overall size of the gate, the number of arc-extinguishing grids is not so large. Therefore, the number of short arcs that can be divided is not much. The total number of short arcs divided is the number of arc-extinguishing grids minus one.
  • the object of the present invention is to solve the above problems, and to provide an arc extinguishing grid and an arc extinguishing device for the arc extinguishing grid to increase the number of short arcs that are divided, thereby improving the arc extinguishing effect of the arc extinguishing device.
  • the present invention provides an arc chute having a mounting portion for mounting and a receiving portion for receiving an arc, the receiving portion being provided with a diverting portion for dividing the arc, and the diverting portion including the through receiving portion a through hole and a tongue of the protruding receiving portion, the oblique tongue is disposed on a side of the through hole away from the arc inlet end and extends toward the arc inlet end, the angle between the oblique tongue and the surface of the receiving portion is an acute angle, the root of the oblique tongue and the receiving portion Continuously, the receiving portion is provided with one or more diverters along the direction of propagation of the arc.
  • the present invention also provides an arc extinguishing device comprising the above arc extinguishing grid sheet, which has a plurality of arc extinguishing grid sheets and an insulating support member for mounting the arc extinguishing grid sheets, and the adjacent arc extinguishing grid sheets are separated from each other.
  • the crucible forms an arc passage for receiving an arc
  • the arc chute has a mounting portion for mounting and a receiving portion for receiving an arc
  • the receiving portion is provided with a diverting portion for dividing the arc
  • the diverting portion includes a through hole penetrating the receiving portion
  • a tongue protruding from the receiving portion the oblique tongue is disposed on a side of the through hole away from the arc inlet end and extends toward the arc inlet end, the angle between the oblique tongue and the surface of the receiving portion is an acute angle
  • the root of the inclined tongue is continuous with the receiving portion, and is received
  • the portion is provided with one or more shunts along the direction of propagation of the arc.
  • the oblique tongue of the first arc-extinguishing grid is staggered and disposed opposite to the oblique tongue of the second arc-extinguishing grid.
  • the present invention also provides a switch including the above-mentioned arc extinguishing device, which has a movable contact, a static contact, and an arc extinguishing device for receiving an arc of the moving and static contact, which is extinguished.
  • the arc device has a plurality of arc extinguishing grids and an insulating support member for mounting the arc extinguishing grid sheets, and the adjacent arc extinguishing grid sheets are mutually separated to form an arc passage for receiving an arc, and the arc extinguishing grid sheets are provided for mounting.
  • the receiving portion is provided with a diverting portion for dividing the arc, the diverting portion comprising a through hole penetrating the receiving portion and a tongue of the protruding receiving portion, the oblique tongue being disposed at the through hole A side away from the inlet end of the arc and extending toward the arc inlet end, the angle between the oblique tongue and the surface of the receiving portion is an acute angle, the root of the inclined tongue is continuous with the receiving portion, and the receiving portion is provided with one or more diverting portions in the direction of propagation of the arc.
  • the oblique tongue of the first arc extinguishing grid is staggered and disposed opposite to the oblique tongue of the second arc extinguishing grid.
  • the arc extinguishing grid and the arc extinguishing device using the present invention can bring the following beneficial effects:
  • the shunt portion can be completed together in the arc-cutting grid punching and bending process, with little increase in cost.
  • FIG. 1 is a perspective view of a conventional arc extinguishing grid
  • FIG. 2 is a perspective view of a first arc extinguishing grid in the first to fourth embodiments of the present invention.
  • FIG. 3 is a perspective view of a second arc extinguishing grid of Embodiment 2 of the present invention and Embodiment 4; [0021] FIG.
  • Figure 4 is a partial cross-sectional view taken along line A-A of Figure 2;
  • Figure 5 is a cutaway perspective view of Figure 1;
  • Figure 6 is a cutaway perspective view of Figure 2 taken along the line A-A;
  • Figure 7 is a cutaway perspective view of Figure 3;
  • FIG. 8 is a perspective view of a conventional arc extinguishing device
  • FIG. 9 is a perspective view of a second arc extinguishing device in the second embodiment.
  • Figure 10 is a cutaway perspective view taken along line B-B of Figure 8.
  • Figure 11 is a front elevational view of Figure 10;
  • Figure 12 is a cutaway perspective view of the first arc extinguishing device in the first embodiment
  • Figure 13 is a front elevational view of Figure 12;
  • FIG. 14 is a cutaway perspective view of the second arc extinguishing device in the second embodiment
  • Figure 15 is a front elevational view of Figure 14;
  • FIG. 16 is a cutaway perspective view of a third arc extinguishing device in the third embodiment; [0034] FIG. Figure 17 is a front elevational view of Figure 16;
  • FIG. 18 is a cutaway perspective view of a fourth arc extinguishing device in the fourth embodiment.
  • Figure 19 is a front elevational view of Figure 18;
  • FIG. 20 is a perspective view of a conventional arc extinguishing device
  • FIG. 21 is a perspective view of a conventional arc extinguishing grid
  • FIG. 22 is a perspective view of a third arc extinguishing grid in Embodiment 5 and Embodiment 6 of the present disclosure. [0040] FIG.
  • FIG. 23 is a perspective view of a fourth arc chute in the sixth embodiment of the present disclosure.
  • Figure 24 is a cutaway perspective view of Figure 21;
  • Figure 25 is a cutaway perspective view of Figure 22;
  • FIG. 26 is a cutaway perspective view of FIG. 23;
  • Figure 27 is a partially cutaway perspective view of Figure 20;
  • FIG. 28 is a front elevational view of FIG. 27;
  • FIG. 29 is a cutaway perspective view of a fifth arc extinguishing device in Embodiment 5; [0047] FIG.
  • Figure 30 is a front elevational view of Figure 29;
  • FIG. 31 is a cutaway perspective view of the sixth arc extinguishing device in the sixth embodiment.
  • Figure 32 is a front elevational view of Figure 31;
  • 33-40 is a schematic sectional view showing the arc of the first arc extinguishing device in the first embodiment
  • FIG. 41-45 is a schematic diagram showing the number of segments of the first arc extinguishing device after the segmentation of the arc in the first embodiment
  • FIGS. 45-51 are fragmentary schematic views of the arc of the second arc extinguishing device in the second embodiment
  • FIG. 53-57 is a schematic diagram showing the number of segments after the arcing of the second arc extinguishing device in the second embodiment
  • FIG. 1 is a perspective view of a conventional arc chute having a mounting portion for mounting and a receiving portion for receiving an arc, the mounting portion being four convex and for embedding an insulating support Lobe of the piece, as shown
  • the left side position is shown with an arc inlet end, and the arc moves from the arc inlet end and then moves at the receiving portion.
  • FIG. 2 is a perspective view of a first arc chute 4 of the present invention having a mounting portion for mounting and a receiving portion for receiving an arc, the mounting portion being four convex and
  • the lug for embedding the insulating support is provided with an arc inlet end as shown in the left position, and the arc moves from the arc inlet end to move at the receiving portion, and the receiving portion is provided with a diverting portion 1 for dividing the arc, the receiving portion
  • the number of the branching portions 1 is set in accordance with the length of the receiving portion. In the present embodiment, three branching portions 1 are provided.
  • FIG. 4 is a partial cross-sectional view of the diverting portion 1 including a through hole 3 penetrating the receiving portion and a tongue 2 protruding from the receiving portion, the tongue 2 being disposed at a distance of the through hole 3 away from the arc inlet end
  • the side extends toward the arc inlet end, and the angle between the tongue 2 and the surface of the receiving portion is an acute angle.
  • the angle of the embodiment is 35 degrees.
  • the root of the tongue 2 is continuous with the receiving portion, and is connected by a circular arc.
  • the distance of the end of the tongue 2 for dividing the arc from the projection of the receiving portion to the arc inlet end is smaller than the distance from the edge of the through hole 3 to the arc inlet end, such that the arc first contacts the oblique tongue 2, is further divided, and finally enters Hole 3.
  • the first arc-extinguishing grid 4 is different from the conventional arc-extinguishing grid in that the receiving portion is obtained by processing the diverting portion 1 at the receiving portion of the existing arc-extinguishing grid.
  • An arc extinguishing grid 4, the diverting portion 1 can be formed by, but not limited to, a punch forming process.
  • FIGS. 8, 10, and 11 show a conventional arc extinguishing device having eight arc extinguishing grids and two insulating supports for mounting the arc extinguishing grid, and two insulating support clips.
  • Holding 8 arc chutes, adjacent arc chutes are spaced apart from each other to form an arc channel for receiving an arc.
  • the mounting portion of the arc chute is embedded in the insulating support member and fastened to the insulating support member.
  • the arc extinguishing grating plates are insulated from each other and arranged in parallel, and the distance between the adjacent arc extinguishing grating plates is the same.
  • FIGS. 12 and 13 show a first arc extinguishing device of the present invention having eight arc extinguishing grids and two insulating supports for mounting the arc extinguishing grid, and two insulating supports.
  • the arc chute 4, adjacent arc chutes are spaced apart from each other to form an arc passage for receiving an arc.
  • the mounting portion of the arc chute is embedded in the insulating support and fastened to the insulating support, and the arc extinguishing gratings are insulated from each other and arranged in parallel.
  • the expanded gas enters the arc channel, it is shunted by the splitting portion 1, a part of the gas continues to move along the current arc channel, and another part of the gas is introduced into the through hole under the action of the oblique tongue 2. 3 and enter the adjacent arc channel.
  • After a long arc enters from the inlet end of the arc extinguishing device it is divided into 7 small arcs by 8 arc extinguishing grids, and the divided small arc continues to propagate forward in the arc channel.
  • the small arc When the small arc encounters the diverter 1 That is, due to the action of the electromagnetic force or the air flow, the small arc is divided into two segments by the oblique tongue 2 of the diverting portion 1, and a portion moves along the upper surface of the oblique tongue 2 to continue moving forward in the current arc passage. The other section moves forward along the lower surface of the slanting tongue 2 through the through hole 3 into the adjacent arc passage. The shunted arc continues to move within the arc passage, and when the arc encounters the split portion 1 again during the movement, the arc is again split according to the aforementioned division rule.
  • 33-40 are schematic sectional views of the arc of the first arc extinguishing device, and the arc channels are named A, B, C, D, E, F, G from top to bottom.
  • the black short line indicates the arc, and the order of the front and the rear does not represent the true order of the real arc.
  • the passage A is first taken as an example.
  • the arc is located at the inlet end of the channel A.
  • the arc is split into two segments for the first time in channel A, one segment continuing in channel A and the other segment in channel B, as shown in FIG.
  • the arc is split into two segments for the second time in channel A, one segment continuing in channel A and the other segment in channel B, as shown in FIG.
  • the arc is divided into two segments in the channel A for the third time, one segment continues in the channel A, and the other segment in the channel B, as shown in FIG. 36, there is a section of arc in the channel A, channel B There are 3 arcs inside.
  • the second arc in channel B in Fig. 36 is divided into two segments, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the first arc in channel B in Fig. 37 is divided into two segments, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the first arc in channel B in Fig. 38 is divided into two segments, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the first arc in channel C in FIG. 39 is divided into two segments, one segment continuing in channel C and the other segment in channel D, as shown in FIG. 40, which is initially located at the inlet end of channel A.
  • the arc is divided, and the number of segments is counted as: one arc in channel A, three arcs in channel B, one arc in channel C, and one arc in channel D.
  • the combination of letters and numbers indicates the division.
  • the front letter represents the arc channel where the arc at the inlet end of the arc extinguishing device is located, and the latter number represents the current channel. The number of short arcs.
  • the segmentation condition after a section of the arc passes through the channel D is: Dl, D3, D3, Dl, as shown in FIG.
  • the segmentation condition after an arc passing through the channel E is: El, E3, E3, El, as shown in FIG. 43
  • the segmentation of an arc after passing through the channel F is: Fl , F3, F3, Fl, as shown in Figure 43
  • the segmentation of an arc after passing through the channel G is: Gl, G3, G3, Gl, as shown in FIG.
  • the total number of short arcs per channel is summarized to obtain the final short arc number of the entire arc extinguishing device.
  • the arc extinguishing performance of the first arc extinguishing device is more than six times that of the existing arc extinguishing device.
  • the arc is no longer re-ignited and extinguished, that is, if the single arc gap voltage is less than the dielectric recovery strength, then The arc of a single arc gap is no longer re-ignited. If the arc of each arc gap is no longer re-ignited, the arc in the entire arc extinguishing device is extinguished. Therefore, if a long arc can be divided into more short arcs, the voltage of the single arc gap will be smaller, and the more the arc is re-ignited.
  • the first arc extinguishing device replaces the arc extinguishing grating piece between the first and second arc extinguishing grating pieces in the existing arc extinguishing device with the first arc extinguishing grating piece 4, the total arc extinguishing grating piece and the arc channel.
  • the number remains the same, the number of arc chutes is eight, the number of arc chutes is seven, and the overall dimensions of the arc extinguishing device remain unchanged.
  • a long arc is divided into 44 short arcs after passing through the first arc extinguishing device, and the existing arc extinguishing device can only be divided into 7 short arcs.
  • the short arc of each section of the arc extinguishing device is subjected to different electromagnetic forces, and the moving speed of each short arc is different, which is advantageous.
  • the short arc after the arc in the arc passage is divided by the branching portion 1 is prevented from being merged with the short arc divided by the branching portion 1 in the adjacent arc passage.
  • FIG. 3 and FIG. 7 are a perspective view and a partially cutaway perspective view of a second arc extinguishing grid 5 of the present invention, and the second arc extinguishing grid 5 is the first arc extinguishing in the first embodiment.
  • the three shunts 1 on the grid 4 are moved by a certain distance in the arc propagation direction, and the moving distance is about the distance between the half adjacent shunts 1 for the purpose of making the first arc chute 4 and the first
  • the two arc extinguishing grids 5 are disposed opposite to each other, and the diverting portion 1 on the first arc extinguishing grid 4 and the diverting portion 1 on the second arc extinguishing grid 5 are interdigitated.
  • FIG. 9 is a perspective view of a second arc extinguishing device of the present disclosure.
  • the second arc extinguishing device is the first arc extinguishing grating 4 of the first arc extinguishing device of the first embodiment.
  • the second arc extinguishing grid 5 is replaced with the second arc extinguishing grid 5 and the second arc extinguishing grid 5 are alternately disposed.
  • the slanting tongue 2 of the first arc extinguishing grid 4 and the slanting tongue 2 of the second arc extinguishing grid 5 are staggered and opposed to each other.
  • FIGS. 46-57 are schematic diagrams of the arcing of the second arc extinguishing device, and the arc channels are named A, B, C, D, E, F, G from top to bottom.
  • the black short line indicates the arc, and the order of the front and the back does not represent the true order of the real arc.
  • the arc is first passed through the passage A and an arc. Take channel B as an example.
  • the arc is located at the inlet end of the channel A, and the arc is located at the inlet end of the channel B.
  • the arc in channel A is not split directly through, and the arc in channel B is split into two segments for the first time, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the arc in channel C is not split directly through, and the arc in channel B is divided into two segments by the ground twice, one segment continuing in channel B and the other segment in channel A, as shown in FIG.
  • the arc in channel A is not split directly through, and the arc in channel B is divided into two segments by the ground three times, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the arc in channel C is not split directly through, and the arc in channel B is divided into two segments four times, one segment continuing in channel B and the other segment in channel A, as shown in FIG.
  • the arc in channel A is not split directly through, and the arc in channel B is divided into two segments by ground five times, one segment continuing in channel B and the other segment in channel C, as shown in FIG.
  • the arc in the channel C is not directly passed through, and the arc in the channel B is divided into two segments by the ground six times, one segment continues in the channel B, and the other segment is in the channel A, as shown in FIG. ⁇ , the arc at the entrance end of channel B is initially divided.
  • the number of segments is counted as three arcs in channel A, one arc in channel B, and three arcs in channel C.
  • the arc at the inlet end of channel A is directly passed through channel A because it is not split. Therefore, in the last channel A, there are 1 segment of channel A with undivided arc and 3 segments with segment B divided by arc.
  • the division is represented by a combination of letters and numbers.
  • the former letter represents the arc path where the arc at the entrance end of the arc extinguishing device is located, and the latter number represents the number of short arcs of the current channel.
  • the segmentation of an arc passing through the channel A and an arc passing through the channel B is: Al, B3, Bl, B3, as shown in FIG.
  • the set of arrays with a dashed box, as shown in Figure 54.
  • the arc extinguishing performance of the second arc extinguishing device is more than three times that of the existing arc extinguishing device.
  • the third arc extinguishing device is the number of the first arc extinguishing grating 4 in the first arc extinguishing device in the first embodiment. It is reduced from 6 to 4, and the distance between adjacent arc extinguishing grids is different. Since the distance between the adjacent arc extinguishing grids is different, the arc enters the arc inlet end of the third arc extinguishing device and is divided into five short arcs of different lengths.
  • the electromagnetic force of each arc is different, which causes the moving speed of each short arc to be different, which is beneficial to avoid short arc and adjacent arc after the arc in the arc channel is divided by the diverting part 1.
  • the short arc is divided by the shunt portion 1 in the arc passage.
  • the fourth arc extinguishing device is the first arc extinguishing grating 4 of the third arc extinguishing device of the third embodiment.
  • the first arc extinguishing grid 4 and the second arc extinguishing grid 5 are alternately disposed, and the oblique tongue 2 of the first arc extinguishing grid 4 and the second arc extinguishing grid 5 are inclined. Tongue 2 is staggered and facing each other.
  • FIG. 20 shows another conventional arc extinguishing device for large current switching, in which a plurality of moving contacts collectively complete the breaking or closing of a phase current.
  • the arc extinguishing grid is as shown in FIG. 21, and has a mounting portion for mounting and a receiving portion for receiving an arc, and the mounting portions at both ends are respectively embedded in the grooves provided on the corresponding insulating support members, as shown in FIG.
  • the left side position is shown with an arc inlet end, and the arc moves from the arc inlet end and then moves at the receiving portion.
  • FIG. 22 is a perspective view of the first arc extinguishing grid 4 of the present invention having a mounting portion for mounting and a receiving portion for receiving an arc, the mounting portions at both ends being respectively embedded with corresponding insulation
  • the left side position shown in FIG. 22 is provided with an arc inlet end, and the arc moves from the arc inlet end to move in the receiving portion, and the receiving portion is provided with a diverting portion 1 for dividing the arc, the receiving portion
  • the number of the branching portions 1 is set in accordance with the length of the receiving portion. In the present embodiment, three branching portions 1 are provided.
  • the first arc-extinguishing grid 4 is different from the conventional arc-extinguishing grid in that the receiving portion is obtained by processing the diverting portion 1 at the receiving portion of the existing arc-extinguishing grid.
  • An arc extinguishing grid 4, the diverting portion 1 can be formed by, but not limited to, a punch forming process.
  • FIG. 27 and 28 show another conventional arc extinguishing device shown in FIG. 20, which has eight arc extinguishing grids and two insulating supports for mounting the arc extinguishing grid, one of which The insulating support has been removed, and two insulating supports hold eight arc chutes, and adjacent arc chutes are spaced apart from each other to form an arc passage for receiving an arc.
  • the mounting portions at both ends are respectively embedded in the recesses provided in the corresponding insulating support members, and the two insulating members are fastened by screws to fix the arc extinguishing grids in the corresponding grooves.
  • the arc extinguishing grids are insulated from each other, and the angle between adjacent arc extinguishing grids is the same.
  • 29 and 30 show a fifth arc extinguishing device of the present invention having eight arc extinguishing grids and two insulating supports for mounting the arc extinguishing grid, wherein one insulating support member Removed, 2 insulating supports hold 8 arc-extinguishing grids, 6 of which are third arc-extinguishing grids 6, the other 2 are existing arc-extinguishing grids, and 2 existing arc-extinguishing grids
  • Six third arc chute sheets 6 are disposed between the sheets, and adjacent arc chute sheets are spaced apart from each other to form an arc passage for receiving an arc.
  • the mounting portions at the two ends are respectively embedded in the grooves provided on the corresponding insulating support members, and the two insulating support members are fastened by screws to fix the arc extinguishing grating pieces in the corresponding grooves.
  • the small arc When the small arc encounters the diverter 1 That is, due to the action of the electromagnetic force or the air flow, the small arc is divided into two segments by the oblique tongue 2 of the diverting portion 1, and a portion moves along the upper surface of the oblique tongue 2 to continue moving forward in the current arc passage. The other section moves forward along the lower surface of the slanting tongue 2 through the through hole 3 into the adjacent arc passage.
  • the shunted arc continues to move within the arc channel, and when the arc encounters the diverter 1 ⁇ again during the movement, the arc is again segmented according to the aforementioned segmentation rules.
  • FIG. 23 and FIG. 26 are a perspective view and a partially cutaway perspective view of a fourth arc extinguishing grid 7 of the present invention, and the fourth arc extinguishing grid 7 is the third arc extinguishing in the fifth embodiment.
  • the six shunts 1 on the grid 6 are moved a certain distance in the arc propagation direction, and the moving distance is the distance between the half adjacent shunts 1 for the purpose of making the third arc chute 6 and the fourth
  • the arc chute sheets 7 are disposed opposite to each other, and the shunt portions 1 on the third arc chute grid 6 and the shunt portions 1 on the fourth arc chute grid 7 are interdigitated.
  • the sixth arc extinguishing device is the third third arc extinguishing grating 6 of the fifth arc extinguishing device of the fifth embodiment.
  • the fourth arc extinguishing grid piece 7 and the fourth arc extinguishing grid piece 7 are alternately disposed, and the oblique tongue 2 of the third arc extinguishing grid piece 6 and the fourth arc extinguishing grid piece 7 are inclined. Tongue 2 is staggered and facing each other.
  • the arc-extinguishing grid and the arc extinguishing device of the present invention can also be used for the arc generated by the dynamic and static contact of the liquid in the liquid.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

一种灭弧栅片，属于电力设备领域，其具有用于安装的安装部和用于接纳电弧的接纳部，接纳部设置有用于分割电弧的分流部（1），分流部（1）包括贯穿接纳部的通孔（3）和凸出接纳部的斜舌（2），斜舌（2）设置在通孔（3）远离电弧入口端的一侧且朝电弧入口端延伸，斜舌（2）与接纳部表面的夹角为锐角，斜舌（2）的根部与接纳部连续，接纳部沿电弧的传播方向设置一个或者多个分流部（1）。该方案的有益效果：1.相同的空间内一束长弧被分割出更多的短弧；2.弧隙电压锐减，大大地降低了弧隙电弧重燃的机会；3.只需在灭弧栅片上加工分流部（1）而无需增加其他灭弧零件即可实现开关的高效灭弧性能；4.分流部（1）可在灭弧栅片冲裁成型工艺中一起完成，几乎不增加成本；5.无需改变现有开关整体尺寸即可完成开关灭弧性能的升级。

Description

灭弧栅片和包含该灭弧栅片的灭弧装置及包含该灭弧装 置的幵关 技术领域
[0001] 本发明涉及电力设备领域， 具体涉及一种灭弧栅片。
背景技术
[0002] 在电力幵关领域， 当幵关的动静触头彼此分幵吋， 会在动静触头之间形成电弧 ， 电弧是具有危害性的， 因此， 幵关中会配置用于熄灭电弧的灭弧装置， 灭弧 装置是一个栅片灭弧罩， 利用将电弧分为多个串联的短弧的方法来灭弧。 电弧 会加热周围的气体， 使气体迅速受热膨胀， 膨胀的气体进入灭弧装置， 最后从 灭弧罩的出气口排出。 电弧是一束游离的气体， 质量极轻， 容易变形， 在气体 或者液体的流动作用下或者电磁力的作用下， 电弧能迅速移动， 伸长或者弯曲
。 由于受到电磁力或者其他外力 （气流、 液流） 的作用， 电弧被引入到金属栅 片内， 一束长电弧就被多个金属栅片分割成多个串联的短电弧。 如果所有串联 短电弧阴极区的起始介质强度总和永远大于触头间的外施电压， 电弧就不再重 燃而熄灭， 也就是说， 若单个弧隙电压小于介质恢复强度， 则单个弧隙的电弧 就不再重燃， 若每个弧隙的电弧都不再重燃， 则整个灭弧装置内的电弧被熄灭 。 因此， 一束长电弧若能被分割出更多的短电弧， 则单个弧隙的电压也就越小 ， 越不利电弧重燃。 由于受到幵关整体尺寸的限制， 灭弧栅片的数量不会很多 ， 因此， 能分割出来的短电弧数量也不会很多， 分割出来的短电弧总数量为灭 弧栅片数量减去 1。
技术问题
[0003] 如何增加分割出来的短电弧数量来提高灭弧装置的灭弧效果， 但不增加灭弧栅 片数量， 进而不增大幵关的整体尺寸。
问题的解决方案
技术解决方案 [0004] 本发明的目的在于解决上述问题， 并提供一种灭弧栅片以及包含给灭弧栅片的 灭弧装置以增加分割出来的短电弧数量， 进而提高灭弧装置的灭弧效果。
[0005] 为此， 本发明提供一种灭弧栅片， 其具有用于安装的安装部和用于接纳电弧的 接纳部， 接纳部设置有用于分割电弧的分流部， 分流部包括贯穿接纳部的通孔 和凸出接纳部的斜舌， 斜舌设置在通孔远离电弧入口端的一侧且朝电弧入口端 延伸， 斜舌与接纳部表面的夹角为锐角， 斜舌的根部与接纳部连续， 接纳部沿 电弧的传播方向设置一个或者多个分流部。
[0006] 本发明还提供一种包含上述灭弧栅片的灭弧装置， 其具有多个灭弧栅片和用于 安装灭弧栅片的绝缘支撑件， 相邻的灭弧栅片相互隔幵形成用于接纳电弧的电 弧通道， 灭弧栅片具有用于安装的安装部和用于接纳电弧的接纳部， 接纳部设 置有用于分割电弧的分流部， 分流部包括贯穿接纳部的通孔和凸出接纳部的斜 舌， 斜舌设置在通孔远离电弧入口端的一侧且朝电弧入口端延伸， 斜舌与接纳 部表面的夹角为锐角， 斜舌的根部与接纳部连续， 接纳部沿电弧的传播方向设 置一个或者多个分流部。
[0007] 可选地， 第一灭弧栅片的斜舌与第二灭弧栅片的斜舌交错且相向设置。
[0008] 本发明还提供一种包含上述灭弧装置的幵关， 其具有动触头、 静触头和用于接 纳动、 静触头分幵吋产生电弧的灭弧装置， 所述的灭弧装置具有多个灭弧栅片 和用于安装灭弧栅片的绝缘支撑件， 相邻的灭弧栅片相互隔幵形成用于接纳电 弧的电弧通道， 灭弧栅片具有用于安装的安装部和用于接纳电弧的接纳部， 其 特征在于， 接纳部设置有用于分割电弧的分流部， 分流部包括贯穿接纳部的通 孔和凸出接纳部的斜舌， 斜舌设置在通孔远离电弧入口端的一侧且朝电弧入口 端延伸， 斜舌与接纳部表面的夹角为锐角， 斜舌的根部与接纳部连续， 接纳部 沿电弧的传播方向设置一个或者多个分流部。
[0009] 可选地， 第一灭弧栅片的斜舌与第二灭弧栅片的斜舌交错且相向设置。
发明的有益效果
有益效果
[0010] 采用本发明公幵的灭弧栅片及灭弧装置可带来如下有益效果：
[0011] 1.相同的空间内， 一束长电弧被分割出更多的短电弧， 短电弧数量剧增。 [0012] 2.电弧的总长度变长， 增加电弧与周围介质的接触面积， 加强冷却和扩散作用
， 有利于灭弧。
[0013] 3.电弧的总长度变长， 电阻变大， 不利于电弧的重燃， 有利于灭弧。
[0014] 4.弧隙电压锐减， 大大地降低了弧隙电弧重燃的机会。
[0015] 5.只需在现有幵关的灭弧栅片上加工分流部而无需增加其他的灭弧零件即可实 现幵关的高效灭弧性能。
[0016] 6.分流部可以在灭弧栅片冲裁折弯工艺中一起完成， 几乎不增加成本。
[0017] 7.无需改变现有幵关的整体尺寸即可完成幵关灭弧性能的升级。
对附图的简要说明
附图说明
[0018] 在下面参照附图对作为非限制性实施例给出的实施方式的说明中， 本发明及其 优越性将得到更好的理解， 附图如下：
[0019] 图 1是现有一种灭弧栅片的立体图；
[0020] 图 2是本发明公幵的实施例一至实施例四中的第一灭弧栅片的立体图；
[0021] 图 3是本发明公幵的实施例二和实施例四中的第二灭弧栅片的立体图；
[0022] 图 4是图 2中沿 A-A方向的局部剖视图；
[0023] 图 5是图 1的剖切立体图；
[0024] 图 6是图 2沿 A-A方向的剖切立体图；
[0025] 图 7是图 3的剖切立体图；
[0026] 图 8是现有一种灭弧装置的立体图；
[0027] 图 9是实施例二中的第二灭弧装置的立体图；
[0028] 图 10是图 8中沿 B-B方向的剖切立体图；
[0029] 图 11是图 10的正视图；
[0030] 图 12是实施例一中的第一灭弧装置的剖切立体图；
[0031] 图 13是图 12的正视图；
[0032] 图 14是实施例二中的第二灭弧装置的剖切立体图；
[0033] 图 15是图 14的正视图；
[0034] 图 16是实施例三中的第三灭弧装置的剖切立体图； [0035] 图 17是图 16的正视图；
[0036] 图 18是实施例四中的第四灭弧装置的剖切立体图；
[0037] 图 19是图 18的正视图；
[0038] 图 20是现有一种灭弧装置的立体图；
[0039] 图 21是现有一种灭弧栅片的立体图；
[0040] 图 22是本发明公开的实施例五和实施例六中的第三灭弧栅片的立体图；
[0041] 图 23是本发明公开的实施例六中的第四灭弧栅片的立体图；
[0042] 图 24是图 21的剖切立体图；
[0043] 图 25是图 22的剖切立体图；
[0044] 图 26是图 23的剖切立体图；
[0045] 图 27是图 20的局部剖切立体图；
[0046] 图 28是图 27的正视图；
[0047] 图 29是实施例五中的第五灭弧装置的剖切立体图；
[0048] 图 30是图 29的正视图；
[0049] 图 31是实施例六中的第六灭弧装置的剖切立体图；
[0050] 图 32是图 31的正视图；
[0051] 图 33-40是实施例一中的第一灭弧装置对电弧的分段示意图；
[0052] 图 41-45是实施例一中的第一灭弧装置对电弧的分段后的数量统计示意图；
[0053] 图 45-51是实施例二中的第二灭弧装置对电弧的分段示意图；
[0054] 图 53-57是实施例二中的第二灭弧装置对电弧的分段后的数量统计示意图；
[0055] 附图标记说明
[0056] 1.分流部； 2.斜舌； 3.通孔； 4.第一灭弧栅片； 5.第二灭弧栅片； 6.第三灭弧栅 片； 7.第四灭弧栅片。
本发明的实施方式
[0057] 实施例一
[0058] 图 1所示的是现有一种灭弧栅片的立体图， 其具有用于安装的安装部和用于接 纳电弧的接纳部， 安装部为四个凸出的且用于嵌入绝缘支撑件的凸耳， 如图所 示的左侧位置设置有电弧入口端， 电弧从电弧入口端进入后在接纳部移动。
[0059] 图 2所示的是本发明公幵的第一灭弧栅片 4的立体图， 其具有用于安装的安装部 和用于接纳电弧的接纳部， 安装部为四个凸出的且用于嵌入绝缘支撑件的凸耳 ， 如图所示的左侧位置设置有电弧入口端， 电弧从电弧入口端进入后在接纳部 移动， 接纳部设置有用于分割电弧的分流部 1， 接纳部沿电弧的传播方向设置， 分流部 1的数量根据接纳部的长度选取， 本实施例设置 3个分流部 1。
[0060] 图 4所示的是分流部 1的局部剖视图， 分流部 1包括贯穿接纳部的通孔 3和凸出接 纳部的斜舌 2， 斜舌 2设置在通孔 3远离电弧入口端的一侧且朝电弧入口端延伸， 斜舌 2与接纳部表面的夹角为锐角， 本实施例的夹角采用 35度， 斜舌 2的根部与 接纳部连续， 采用圆弧过渡连接， 设置在斜舌 2上用于分割电弧的端部在接纳部 的投影到电弧入口端的距离小于通孔 3边缘到电弧入口端的距离， 这样的设置使 得电弧先接触到斜舌 2， 进而被分割， 最后进入通孔 3。
[0061] 如图 5-6所示， 第一灭弧栅片 4与现有灭弧栅片的区别在于接纳部， 通过在现有 灭弧栅片的接纳部加工分流部 1即可获得第一灭弧栅片 4， 分流部 1可通过但不限 于冲裁折弯成型工艺形成。
[0062] 图 8， 10， 11所示的是一种现有灭弧装置， 其具有 8个灭弧栅片和 2个用于安装 灭弧栅片的绝缘支撑件， 2个绝缘支撑件夹持着 8个灭弧栅片， 相邻的灭弧栅片 相互隔幵形成用于接纳电弧的电弧通道。 灭弧栅片的安装部嵌入绝缘支撑件， 并与绝缘支撑件紧固连接， 各灭弧栅片之间相互绝缘且平行设置， 相邻灭弧栅 片之间的距离相同。 一束长电弧从灭弧装置的入口端进入后， 被 8个灭弧栅片分 割成 7段小电弧， 分割后的小电弧在各自的电弧通道内继续向前传播。
[0063] 图 12， 13所示的是本发明公幵的第一灭弧装置， 其具有 8个灭弧栅片和 2个用于 安装灭弧栅片的绝缘支撑件， 2个绝缘支撑件夹持着 8个灭弧栅片， 其中 6个为第 一灭弧栅片 4， 另外 2个为现有的灭弧栅片， 2个现有的灭弧栅片之间设置 6个第 一灭弧栅片 4， 相邻的灭弧栅片相互隔幵形成用于接纳电弧的电弧通道。 灭弧栅 片的安装部嵌入绝缘支撑件， 并与绝缘支撑件紧固连接， 各灭弧栅片之间相互 绝缘且平行设置。 当膨胀的气体进入电弧通道后， 会被分流部 1分流， 一部分气 体继续沿着当前的电弧通道移动， 另一部分气体则在斜舌 2的作用下被导入通孔 3并进入到相邻的电弧通道。 一束长电弧从灭弧装置的入口端进入后， 被 8个灭 弧栅片分割成 7段小电弧， 分割后的小电弧在电弧通道内继续向前传播， 当小电 弧遇到分流部 1吋， 由于电磁力或者气流的作用， 小电弧被分流部 1的斜舌 2分割 成两段， 一段沿着斜舌 2的上表面移动， 继续在当前的电弧通道向前移动。 另一 段则沿着斜舌 2的下表面穿过通孔 3进入相邻的电弧通道向前移动。 被分流后的 电弧继续在电弧通道内移动， 当电弧在移动过程中再次遇到分流部 1吋， 电弧再 次按照前述的分割规则被分割。
[0064] 图 33-40是第一灭弧装置对电弧的分段示意图， 电弧通道从上到下依次命名为 A ， B， C， D， E， F， G。 以黑色的短线表示电弧， 其前后顺序不代表真实电弧的 真实顺序， 仅为方便统计短电弧的数量， 先以一段电弧通过通道 A为例。
[0065] 图 33所示， 电弧位于通道 A入口端。
[0066] 电弧在通道 A内第一次被分割成两段， 一段继续在通道 A内， 另一段在通道 B内 ， 图 34所示。
[0067] 电弧在通道 A内第二次被分割成两段， 一段继续在通道 A内， 另一段在通道 B内 ， 如图 35所示。
[0068] 电弧在通道 A内第三次被分割成两段， 一段继续在通道 A内， 另一段在通道 B内 ， 如图 36所示， 此吋， 通道 A内有 1段电弧， 通道 B内有 3段电弧。
[0069] 图 36中的通道 B内的第二段电弧被分割成两段， 一段继续在通道 B内， 另一段 在通道 C内， 如图 37所示。
[0070] 图 37中的通道 B内的第一段电弧被分割成两段， 一段继续在通道 B内， 另一段 在通道 C内， 如图 38所示。
[0071] 图 38中的通道 B内的第一段电弧被分割成两段， 一段继续在通道 B内， 另一段 在通道 C内， 如图 39所示。
[0072] 图 39中的通道 C内的第一段电弧被分割成两段， 一段继续在通道 C内， 另一段 在通道 D内， 如图 40所示， 此吋， 起初位于通道 A入口端的电弧被分割完毕， 分 割段数统计为， 通道 A内有 1段电弧， 通道 B内有 3段电弧， 通道 C内有 1段电弧， 通道 D内有 1段电弧。 为了便于分析， 用字母与数字的组合表示分割情况， 前面 的字母代表灭弧装置入口端的电弧所在的电弧通道， 后面的数字代表当前通道 的短电弧数量。
[0073] 因此， 一段电弧通过通道 A后的分段情况为： Al， A3， A3， Al。 如图 41所示
， 为了便于观察分析， 用虚线框将这组数组围住， 如图 42所示。
[0074] 同样地， 一段电弧通过通道 B后的分段情况为： Bl， B3， B3， Bl， 如图 42所 示。
[0075] 同样地， 一段电弧通过通道 C后的分段情况为： Cl， C3， C3， CI , 如图 43所 示。
[0076] 同样地， 一段电弧通过通道 D后的分段情况为： Dl， D3， D3， Dl， 如图 43所 示。
[0077] 同样地， 一段电弧通过通道 E后的分段情况为： El， E3， E3， El , 如图 43所示 [0078] 同样地， 一段电弧通过通道 F后的分段情况为： Fl， F3， F3， Fl， 如图 43所示
[0079] 同样地， 一段电弧通过通道 G后的分段情况为： Gl， G3， G3， Gl， 如图 43所 示。
[0080] 由于， 通道 G下面没有其他通道， 所以将位于通道外的字母数字组合去除， 保 留位于通道内的字母数字组合， 如图 44所示。
[0081] 最后， 将每个通道内的数字相加， 即可得到每个通道内的短电弧总数量， 如图
45所示， 再将每个通道的短电弧总数量汇总， 即可得到整个灭弧装置最终的短 电弧数量。
[0082] 通过上述分析统计可知， 一束长电弧通过第一灭弧装置后将被分割成 44段短电 弧。 而现有的灭弧装置， 只能将一束长电弧分割成 7段短电弧， 第一灭弧装置分 割出的短电弧数量是现有灭弧装置分割出的短电弧数量的 6倍多， 分割出的短电 弧的数量剧增可带来如下有益效果。 1.短电弧的数量越多， 电弧的总长度越长， 电阻越大， 越不利于电弧的重燃， 越有利于灭弧。 2.短电弧数量越多， 电弧的总 长度越长， 增加电弧与周围介质的接触面积， 加强冷却和扩散作用， 有利于灭 弧。 3.短电弧数量越多， 弧隙电压越小， 大大地降低了弧隙电弧重燃的机会。 第 一灭弧装置的灭弧性能是现有灭弧装置的灭弧性能的 6倍多。 [0083] 如果所有串联短电弧阴极区的起始介质强度总和永远大于触头间的外施电压， 电弧就不再重燃而熄灭， 也就是说， 若单个弧隙电压小于介质恢复强度， 则单 个弧隙的电弧就不再重燃， 若每个弧隙的电弧都不再重燃， 则整个灭弧装置内 的电弧被熄灭。 因此， 一束长电弧若能被分割出更多的短电弧， 则单个弧隙的 电压也就越小， 越不利电弧重燃。
[0084] 第一灭弧装置是将现有灭弧装置中位于首尾两片灭弧栅片之间的灭弧栅片替换 成第一灭弧栅片 4， 总的灭弧栅片和电弧通道数量保持不变， 灭弧栅片数量是 8 个， 电弧通道数量是 7个， 整个灭弧装置的外形尺寸保持不变。 一束长电弧通过 第一灭弧装置后被分割成 44段短电弧， 而现有的灭弧装置只能分割成 7段短电弧
[0085] 由于磁场分布不均匀或者说电弧受到非匀强磁场的作用， 因此， 灭弧装置的入 口端的各段短电弧所受到的电磁力不同， 各段短电弧的移动速度也不同， 有利 于避免电弧通道内的电弧被分流部 1分割后的短电弧与相邻电弧通道内被分流部 1分割后的短电弧融合。
[0086] 实施例二
[0087] 图 3和图 7所示的是本发明公幵的第二灭弧栅片 5的立体图和局部剖切立体图， 第二灭弧栅片 5是将实施例一中的第一灭弧栅片 4上的 3个分流部 1往电弧传播方 向移动一定距离得到的， 移动的距离约为半个相邻分流部 1之间的距离， 目的是 为了使第一灭弧栅片 4与第二灭弧栅片 5相对设置吋， 第一灭弧栅片 4上的分流部 1与第二灭弧栅片 5上的分流部 1相互交错。
[0088] 图 9所示的是本发明公幵的第二灭弧装置的立体图， 第二灭弧装置是将实施例 一中的第一灭弧装置中的 3个第一灭弧栅片 4替换成第二灭弧栅片 5， 使第一灭弧 栅片 4和第二灭弧栅片 5交替设置。
[0089] 图 14， 15所示的第二灭弧装置， 第一灭弧栅片 4的斜舌 2与第二灭弧栅片 5的斜 舌 2交错且相向设置。
[0090] 图 46-57是第二灭弧装置对电弧的分段示意图， 电弧通道从上到下依次命名为 A ， B， C， D， E， F， G。 以黑色的短线表示电弧， 其前后顺序不代表真实电弧的 真实顺序， 仅为方便统计短电弧的数量， 先以一段电弧通过通道 A及一段电弧 通过通道 B为例。
[0091] 图 46所示， 电弧位于通道 A入口端， 电弧位于通道 B入口端。
[0092] 通道 A内的电弧没有被分割直接通过， 通道 B内电弧第一次被分割成两段， 一 段继续在通道 B内， 另一段在通道 C内， 图 47所示。
[0093] 通道 C内的电弧没有被分割直接通过， 通道 B内的电弧被地二次被分割成两段 ， 一段继续在通道 B内， 另一段在通道 A内， 如图 48所示。
[0094] 通道 A内的电弧没有被分割直接通过， 通道 B内的电弧被地三次被分割成两段 ， 一段继续在通道 B内， 另一段在通道 C内， 如图 49所示。
[0095] 通道 C内的电弧没有被分割直接通过， 通道 B内的电弧被地四次被分割成两段 ， 一段继续在通道 B内， 另一段在通道 A内， 如图 50所示。
[0096] 通道 A内的电弧没有被分割直接通过， 通道 B内的电弧被地五次被分割成两段 ， 一段继续在通道 B内， 另一段在通道 C内， 如图 51所示。
[0097] 通道 C内的电弧没有被分割直接通过， 通道 B内的电弧被地六次被分割成两段 ， 一段继续在通道 B内， 另一段在通道 A内， 如图 52所示， 此吋， 起初位于通道 B入口端的电弧被分割完毕， 分割段数统计为， 通道 A内有 3段电弧， 通道 B内有 1段电弧， 通道 C内有 3段电弧。 而起初位于通道 A入口端的电弧由于没有被分割 而直接通过通道 A， 所以最后通道 A内有 1段通道 A未经分割的电弧和 3段由通道 B 分割后的电弧。 为了便于分析， 用字母与数字的组合表示分割情况， 前面的字 母代表灭弧装置入口端的电弧所在的电弧通道， 后面的数字代表当前通道的短 电弧数量。
[0098] 因此， 一段电弧通过通道 A及一段电弧通过通道 B后的分段情况为： Al， B3， Bl， B3， 如图 53所示。 为了便于观察分析， 用虚线框将这组数组围住， 如图 54 所示。
[0099] 同样地， 一段电弧通过通道 C及一段电弧通过通道 D后的分段情况为： Cl， D3
， Dl， D3， 如图 54所示。
[0100] 同样地， 一段电弧通过通道 E及一段电弧通过通道 F后的分段情况为： El， F3
， Fl， F3， 如图 55所示。
[0101] 同样地， 一段电弧通过通道 G及一段电弧通过通道 H后的分段情况为： Gl， H3 ， HI , H3， 如图 55所示。
[0102] 由于， 通道 G下面没有其他通道， 所以将位于通道外的字母数字组合去除， 保 留位于通道内的字母数字组合， 如图 56所示。
[0103] 最后， 将每个通道内的数字相加， 即可得到每个通道内的短电弧总数量， 如图
57所示， 再将每个通道的短电弧总数量汇总， 即可得到整个灭弧装置最终的短 电弧数量。
[0104] 通过上述分析统计可知， 一束长电弧通过第二灭弧装置后将被分割成 25段短电 弧。 而现有的灭弧装置， 只能将一束长电弧分割成 7段短电弧， 第二灭弧装置分 割出的短电弧数量是现有灭弧装置分割出的短电弧数量的 3倍多， 分割出的短电 弧的数量剧增可带来如下有益效果。 1.短电弧的数量越多， 电弧的总长度越长， 电阻越大， 越不利于电弧的重燃， 越有利于灭弧。 2.短电弧数量越多， 电弧的总 长度越长， 增加电弧与周围介质的接触面积， 加强冷却和扩散作用， 有利于灭 弧。 3.短电弧数量越多， 弧隙电压越小， 大大地降低了弧隙电弧重燃的机会。 第 二灭弧装置的灭弧性能是现有灭弧装置的灭弧性能的 3倍多。
[0105] 实施例三
[0106] 图 16， 17所示的是本发明公幵的第三灭弧装置， 第三灭弧装置是将实施例一中 的第一灭弧装置中的第一灭弧栅片 4的数量由 6个减少为 4个， 同吋使相邻灭弧栅 片之间的距离不同。 由于相邻灭弧栅片之间的距离不同， 所以电弧进入第三灭 弧装置的电弧入口端后就会被分割成 5段不同长度的短电弧。 由于各段短电弧的 长度不同， 所以每段电弧受到的电磁力也不同， 造成每段短电弧的移动速度也 不同， 有利于避免电弧通道内的电弧被分流部 1分割后的短电弧与相邻电弧通道 内被分流部 1分割后的短电弧融合。
[0107] 实施例四
[0108] 图 18， 19所示的是本发明公幵的第四灭弧装置， 第四灭弧装置是将实施例三中 的第三灭弧装置中的 2个第一灭弧栅片 4替换成第二灭弧栅片 5， 使第一灭弧栅片 4和第二灭弧栅片 5交替设置， 第一灭弧栅片 4的斜舌 2与第二灭弧栅片 5的斜舌 2 交错且相向设置。
[0109] 实施例五 [0110] 图 20所示的是另一种现有的灭弧装置， 其用于大电流幵关， 多片动触头共同完 成一相电流的幵断或者闭合。 其灭弧栅片如图 21所示， 其具有用于安装的安装 部和用于接纳电弧的接纳部， 两端的安装部各自嵌入对应的绝缘支撑件上设置 的凹槽内， 如图 21所示的左侧位置设置有电弧入口端， 电弧从电弧入口端进入 后在接纳部移动。
[0111] 图 22所示的是本发明公幵的第一灭弧栅片 4的立体图， 其具有用于安装的安装 部和用于接纳电弧的接纳部， 两端的安装部各自嵌入对应的绝缘支撑件上设置 的凹槽内， 如图 22所示的左侧位置设置有电弧入口端， 电弧从电弧入口端进入 后在接纳部移动， 接纳部设置有用于分割电弧的分流部 1， 接纳部沿电弧的传播 方向设置， 分流部 1的数量根据接纳部的长度选取， 本实施例设置 3个分流部 1。
[0112] 如图 24-25所示， 第一灭弧栅片 4与现有灭弧栅片的区别在于接纳部， 通过在现 有灭弧栅片的接纳部加工分流部 1即可获得第一灭弧栅片 4， 分流部 1可通过但不 限于冲裁折弯成型工艺形成。
[0113] 图 27， 28所示的是图 20所示另一种现有的灭弧装置， 其具有 8个灭弧栅片和 2个 用于安装灭弧栅片的绝缘支撑件， 其中一个绝缘支撑件已撤去， 2个绝缘支撑件 夹持着 8个灭弧栅片， 相邻的灭弧栅片相互隔幵形成用于接纳电弧的电弧通道。 两端的安装部各自嵌入对应的绝缘支撑件上设置的凹槽内， 通过螺钉紧固 2个绝 缘支撑件使灭弧栅片固定在对应的凹槽内。 各灭弧栅片之间相互绝缘， 相邻灭 弧栅片之间的夹角相同。 一束长电弧从灭弧装置的入口端进入后， 被 8个灭弧栅 片分割成 7段小电弧， 分割后的小电弧在各自的电弧通道内继续向前传播。
[0114] 图 29， 30所示的是本发明公幵的第五灭弧装置， 其具有 8个灭弧栅片和 2个用于 安装灭弧栅片的绝缘支撑件， 其中一个绝缘支撑件已撤去， 2个绝缘支撑件夹持 着 8个灭弧栅片， 其中 6个为第三灭弧栅片 6， 另外 2个为现有的灭弧栅片， 2个现 有的灭弧栅片之间设置 6个第三灭弧栅片 6， 相邻的灭弧栅片相互隔幵形成用于 接纳电弧的电弧通道。 两端的安装部各自嵌入对应的绝缘支撑件上设置的凹槽 内， 通过螺钉紧固 2个绝缘支撑件使灭弧栅片固定在对应的凹槽内。 当膨胀的气 体进入电弧通道后， 会被分流部 1分流， 一部分气体继续沿着当前的电弧通道移 动， 另一部分气体则在斜舌 2的作用下被导入通孔 3并进入到相邻的电弧通道。 一束长电弧从灭弧装置的入口端进入后， 被 8个灭弧栅片分割成 7段小电弧， 分 割后的小电弧在电弧通道内继续向前传播， 当小电弧遇到分流部 1吋， 由于电磁 力或者气流的作用， 小电弧被分流部 1的斜舌 2分割成两段， 一段沿着斜舌 2的上 表面移动， 继续在当前的电弧通道向前移动。 另一段则沿着斜舌 2的下表面穿过 通孔 3进入相邻的电弧通道向前移动。 被分流后的电弧继续在电弧通道内移动， 当电弧在移动过程中再次遇到分流部 1吋， 电弧再次按照前述的分割规则被分割
[0115] 实施例六
[0116] 图 23和图 26所示的是本发明公幵的第四灭弧栅片 7的立体图和局部剖切立体图 ， 第四灭弧栅片 7是将实施例五中的第三灭弧栅片 6上的 6个分流部 1往电弧传播 方向移动一定距离得到的， 移动的距离为半个相邻分流部 1之间的距离， 目的是 为了使第三灭弧栅片 6与第四灭弧栅片 7相对设置吋， 第三灭弧栅片 6上的分流部 1与第四灭弧栅片 7上的分流部 1相互交错。
[0117] 图 31， 32所示的是本发明公幵的第六灭弧装置， 第六灭弧装置是将实施例五中 的第五灭弧装置中的 3个第三灭弧栅片 6替换成第四灭弧栅片 7， 使第三灭弧栅片 6和第四灭弧栅片 7交替设置， 第三灭弧栅片 6的斜舌 2与第四灭弧栅片 7的斜舌 2 交错且相向设置。
[0118] 本发明公幵的灭弧栅片、 灭弧装置也可用于处在液体中的动静触头分幵吋产生 的电弧。

Claims

权利要求书
一种灭弧栅片， 其具有用于安装的安装部和用于接纳电弧的接纳部， 其特征在于， 接纳部设置有用于分割电弧的分流部 (1)， 分流部 (1)包 括贯穿接纳部的通孔 (3)和凸出接纳部的斜舌 (2)， 斜舌 (2)设置在通孔 ( 3)远离电弧入口端的一侧且朝电弧入口端延伸， 斜舌 (2)与接纳部表面 的夹角为锐角， 斜舌 (2)的根部与接纳部连续， 接纳部沿电弧的传播 方向设置一个或者多个分流部 (1)。
一种灭弧装置， 其具有多个灭弧栅片和用于安装灭弧栅片的绝缘支撑 件， 相邻的灭弧栅片相互隔幵形成用于接纳电弧的电弧通道， 其特征 在于， 所述的灭弧栅片为权利要求 1中所述的灭弧栅片。
根据权利要求 2所述的一种灭弧装置， 其特征在于， 第一灭弧栅片 (4) 的斜舌 (2)与第二灭弧栅片 (5)的斜舌 (2)交错且相向设置。
根据权利要求 2所述的一种灭弧装置， 其特征在于， 第三灭弧栅片 (6) 的斜舌 (2)与第四灭弧栅片 (7)的斜舌 (2)交错且相向设置。
一种幵关， 其具有动触头、 静触头和用于接纳动、 静触头分幵吋产生 电弧的灭弧装置， 其特征在于， 所述的灭弧装置为权利要求 2-4中任 一项所述的灭弧装置。
PCT/CN2017/088881 2017-06-17 2017-06-17 灭弧栅片和包含该灭弧栅片的灭弧装置及包含该灭弧装置的开关 WO2018086350A1 (zh)

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